Granular dry ice machine and dry ice blasting apparatus

Abstract

The utility model relates to pellet dry ice machine technical field discloses a kind of pellet dry ice machine and dry ice injection equipment, wherein, pellet dry ice machine includes shell assembly and mill assembly, shell assembly has the processing cavity and discharge cavity being connected along vertical direction, mill assembly includes mill part and filter part, filter part is blocked between processing cavity and discharge cavity, multiple screen holes are spaced apart and arranged on filter part, screen hole is arranged through filter part;Mill part is located above filter part, mill part is located above filter part, mill part includes shaft and multiple mill gears, shaft is movably arranged in processing cavity, multiple mill gears are arranged on shaft, and are arranged side by side along the axial direction of shaft, shaft can drive multiple mill gears synchronous rotation around the axial direction of shaft, so that multiple mill gears can mill dry ice retained on filter part, so that granular dry ice after milling can enter discharge cavity through screen hole.The utility model can improve the processing accuracy of pellet dry ice machine.

Description

Technical Field

[0001] This utility model relates to the field of granular dry ice machine technology, and in particular to a granular dry ice machine and a dry ice spraying device. Background Technology

[0002] Currently, dry ice blasting equipment breaks down blocky dry ice into granules using a granular dry ice machine. These granules are then propelled at high speed by high-pressure air onto the surface of the workpiece to be cleaned, removing foreign matter. During the cleaning process, the granular dry ice sublimates directly from a solid to a gaseous state, thus avoiding secondary waste. However, current granular dry ice machines have relatively low particle crushing precision, typically producing only coarse particles with larger diameters. This can easily damage the appearance of the workpiece during the cleaning process. Utility Model Content

[0003] To address the shortcomings of the existing technology, the purpose of this utility model is to provide a granular dry ice machine and a dry ice blasting device, which aims to improve the granule crushing accuracy of the granular dry ice machine.

[0004] To achieve the above objectives, this utility model provides a pellet dry ice machine, including a shell assembly and a grinding assembly. The shell assembly has a processing chamber and a discharge chamber connected in a vertical direction, with the processing chamber located on the top side of the discharge chamber. The grinding assembly includes: A filtration section is positioned between the processing chamber and the discharge chamber. The filtration section has multiple sieve holes spaced apart and extending through it. The grinding section is located above the filtering section. The grinding section includes a rotating shaft and multiple grinding gears. The rotating shaft is movably inserted into the processing chamber. The multiple grinding gears are located on the rotating shaft and arranged side by side along the axial direction of the rotating shaft. The rotating shaft can drive the multiple grinding gears to rotate synchronously around the axial direction of the rotating shaft, so that the multiple grinding gears can grind the dry ice trapped on the filtering section, thereby allowing the ground granular dry ice to pass through the sieve holes and enter the discharge chamber.

[0005] In one embodiment, the grinding assembly has a groove with a top opening, the bottom of the groove having the filter portion formed therein, the grinding portion being movably disposed within the groove and spaced apart from the groove wall.

[0006] In one embodiment, the groove has a semi-circular cross-section in the radial direction of the rotating shaft.

[0007] In one embodiment, the grinding gear has a plurality of teeth along its circumference, the teeth having an arcuate concave surface and an arcuate convex surface arranged opposite to each other.

[0008] In one embodiment, a plurality of teeth are spaced apart circumferentially along the grinding gear, and the teeth of two adjacent gears are misaligned.

[0009] In one embodiment, the processing cavity includes: The mounting cavity is connected above the discharge cavity, the filter section is located on the bottom side of the mounting cavity, and the mounting cavity is sized to match the grinding assembly; and The feeding chamber is connected above the mounting chamber. The top side of the feeding chamber has a feed port for dry ice to enter. The inner wall of the feeding chamber has a guide surface that can guide the dry ice downward into the grinding assembly.

[0010] In one embodiment, the discharge chamber includes a first connecting chamber and a second connecting chamber that are connected in a vertical direction, wherein the first connecting chamber is connected to the lower part of the processing chamber; The pellet dry ice machine also includes a feeding assembly, which has a roller that is movably disposed between the first connecting cavity and the second connecting cavity. The roller has a feeding groove in its circumferential direction and can rotate around its axial direction so that the feeding groove sequentially docks with the first connecting cavity and the second connecting cavity, thereby driving the dry ice to transfer from the first connecting cavity to the second connecting cavity.

[0011] In one embodiment, the second connecting cavity is provided with a partition plate extending in a vertical direction. The partition plate can divide the first connecting cavity into a first chamber and a second chamber. The tops of the first chamber and the second chamber are respectively connected to the first connecting cavity. The wall of the first chamber is provided with an airflow inlet, and the wall of the second chamber is provided with a jet outlet.

[0012] In one embodiment, the pellet dry ice machine further includes a drive assembly, the drive assembly comprising: A drive mechanism, comprising a drive element and a drive shaft, wherein the drive shaft is coaxially arranged with and connected to the rotating shaft, and the drive element is used to drive the drive shaft to rotate axially thereon, thereby causing the rotating shaft to rotate synchronously; and The transmission mechanism includes a transmission shaft, a first transmission gear, and a second transmission gear. The transmission shaft is coaxially arranged with the roller. The first transmission gear and the second transmission gear are respectively located on the drive shaft and the transmission shaft, and the first transmission gear and the second transmission gear are meshed together so that the drive shaft can drive the transmission shaft and the roller to rotate synchronously.

[0013] This utility model also proposes a dry ice blasting device, including an air compressor, a blasting mechanism, and any one of the aforementioned granular dry ice machines. The blasting mechanism has a blasting channel, and the air compressor, the discharge chamber, and the blasting channel are connected in sequence. The air compressor can drive the dry ice in the discharge chamber to be output outward through the blasting channel.

[0014] This utility model provides a pellet dry ice machine and a dry ice blasting device, which have the following advantages compared with the prior art: The dry ice pellet machine of this utility model embodiment includes a grinding assembly disposed in a processing chamber. The grinding part of the grinding assembly includes a rotating shaft and a plurality of grinding gears disposed on the rotating shaft. By driving the rotating shaft to rotate axially, the plurality of grinding gears can be driven to rotate simultaneously, thereby enabling the dry ice entering the processing chamber to be cyclically crushed and ground by the grinding gears. Furthermore, the grinding assembly also includes a filter part located at least partially below the grinding part. Since the filter part is separated between the processing chamber and the discharge chamber below it, and the filter part is provided with a sieve hole, when the dry ice pellets in the processing chamber are too large to pass through the sieve hole, they can be intercepted by the filter part in the processing chamber and continue to be crushed and ground by the grinding part. When the dry ice pellets in the processing chamber are smaller than the sieve hole diameter, they can pass through the sieve hole and enter the discharge chamber downward. This configuration ensures that the dry ice particles entering the discharge chamber are all small-sized particles, thus giving the dry ice machine high particle crushing precision. As a result, when the dry ice particles are sprayed at high speed onto the surface of the workpiece to be cleaned, the impact force on the workpiece is relatively small, reducing the risk of damage to the workpiece's appearance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the granular dry ice machine described in this embodiment of the present invention; Figure 2 This is a side view of the granular dry ice machine described in this embodiment of the utility model; Figure 3 This is a utility model Figure 2 Sectional view of section AA; Figure 4 This is a utility model Figure 3 A magnified view of point A in the image; Figure 5 This is a partial structural schematic diagram of the granular dry ice machine described in an embodiment of the present invention; Figure 6 This is a partial exploded view of the granular dry ice machine described in this embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the grinding assembly described in an embodiment of this utility model.

[0016] In the diagram, 100 is a pellet dry ice machine; 10 is an outer shell assembly; 11 is a processing chamber; 111 is an installation chamber; 112 is a feeding chamber; 1121 is a feeding inlet; 1122 is a guide surface; 12 is a discharging chamber; 121 is a first connecting chamber; 122 is a second connecting chamber; 1221 is a first chamber; 1221a is an airflow inlet; 1222 is a second chamber; 1222a is a jet outlet; 1123 is a partition plate; 20 is a grinding assembly; 21 is a grinding section; 21 1. Rotating shaft; 212. Grinding gear; 2121. Tooth; 2121a. Arc-shaped concave surface; 2121b. Arc-shaped convex surface; 22. Filtering section; 221. Groove; 2211. Screen hole; 30. Feeding assembly; 31. Roller; 311. Feeding trough; 40. Drive assembly; 41. Drive mechanism; 411. Drive component; 412. Drive shaft; 42. Transmission mechanism; 421. Transmission shaft; 422. First transmission gear; 423. Second transmission gear. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0018] It should be understood that the terms "before" and "after" are used in this utility model to describe various types of information, but these terms should not be limited to them. These terms are only used to distinguish information of the same type from each other. For example, "before" information can also be called "after" information, and "after" information can also be called "before" information, without departing from the scope of this utility model.

[0019] like Figures 1 to 7 As shown, a pellet dry ice machine 100 according to an embodiment of the present invention includes a housing assembly 10 and a grinding assembly 20. The housing assembly 10 has a processing chamber 11 and a discharge chamber 12 connected in a vertical direction. The processing chamber 11 is located on the top side of the discharge chamber 12. The grinding assembly 20 includes a grinding section 21 and a filtering section 22. The filtering section 22 is separated between the processing chamber 11 and the discharge chamber 12. The filtering section 22 is provided with a plurality of sieve holes 2211 at intervals, and the sieve holes 2211 pass through the filtering section 22. The grinding section 21 is located on the top side of the discharge chamber 12. Above the filter section 22, the grinding section 21 includes a rotating shaft 211 and a plurality of grinding gears 212. The rotating shaft 211 is movably inserted into the processing chamber 11. The plurality of grinding gears 212 are disposed on the rotating shaft 211 and arranged side by side along the axial direction of the rotating shaft 211. The rotating shaft 211 can drive the plurality of grinding gears 212 to rotate synchronously around the axial direction of the rotating shaft 211, so that the plurality of grinding gears 212 can grind the dry ice trapped on the filter section 22, so that the ground granular dry ice can enter the discharge chamber 12 through the sieve hole 2211.

[0020] The rotating shaft 211 of the crushing component can be connected to the driving component 40 for transmission, so that it can rotate along its axial direction under the drive of the driving component 40; by controlling the rotation speed of the rotating shaft 211 of the crushing part, the crushing efficiency of the crushing component for dry ice particles can be adjusted.

[0021] It is understood that the dry ice pellet machine 100 of this utility model embodiment can drive the rotating shaft 211 to rotate along its axial direction, thereby driving multiple grinding gears 212 to rotate simultaneously, so as to circulately crush and grind the dry ice entering the processing chamber 11 through the grinding gears 212; furthermore, since the filter section 22 is separated between the processing chamber 11 and the discharge chamber 12 below it, and the filter section 22 is provided with a through-hole sieve 2211, when the dry ice pellets in the processing chamber 11 are too large to pass through the sieve 2211, they can be intercepted by the filter section 22 in the processing chamber 11 and continue to be crushed and ground by the grinding section 21. When the dry ice pellets in the processing chamber 11 are smaller than the aperture of the sieve 2211, they can pass through the sieve 2211 and enter the discharge chamber 12 downwards. This configuration ensures that the granular dry ice entering the discharge chamber 12 consists of small particles, with a particle size of less than 1 mm. This results in the granular dry ice machine 100 having high particle crushing precision. Consequently, when the granular dry ice is sprayed at high speed onto the surface of the workpiece to be cleaned, the impact force on the workpiece is relatively small, reducing the risk of damage to the workpiece's appearance.

[0022] Specifically, in one feasible embodiment, the sieve holes 2211 on the filter section 22 are circular, and the vertical distance between the grinding gear 212 and the filter section 22 is smaller than the inner diameter of the sieve holes 2211, so as to ensure that the grinding gear 212 can grind the dry ice trapped above the filter section 22 into granular dry ice particles smaller than the inner diameter of the sieve holes 2211. Of course, the technical solution of this utility model is not limited to this. In other embodiments, the sieve holes 2211 on the filter section 22 may also be triangular, square, or other shapes. In this case, the vertical distance between the grinding gear 212 and the filter section 22 may be smaller than the minimum aperture of the sieve holes 2211. The specific implementation can be set according to actual needs and is not limited here.

[0023] like Figures 3 to 4 and Figure 7 As shown, the grinding assembly 20 of this embodiment has a groove 221 with a top opening. A filter section 22 is formed at the bottom of the groove 221. The grinding section 21 is movably disposed within the groove 221 and spaced apart from the groove wall of the groove 221. With this arrangement, dry ice entering the processing chamber 11 can fall into the groove 221 of the grinding assembly 20, allowing the dry ice to be subjected to stronger compression and shearing action between the grinding gear 212 and the groove wall, which is beneficial to further ensure the crushing effect of the grinding section on the dry ice.

[0024] Furthermore, in this embodiment of the invention, the groove 221 has a semi-circular cross-section in the radial direction of the rotating shaft 211. This arrangement allows the shape of the groove 221 to match the shape of the grinding gear 212, and the groove wall of the groove 221 can surround the bottom of the grinding gear 212, thereby facilitating the cooperation between the groove wall of the groove 221 and the grinding gear 212 to crush dry ice.

[0025] like Figure 7 As shown, the grinding gear 212 of this embodiment of the present invention has a plurality of teeth 2121 along its circumference. The teeth 2121 have arc-shaped concave surfaces 2121a and arc-shaped convex surfaces 2121b arranged opposite to each other. This arrangement is beneficial for the teeth 2121 to smoothly cut dry ice and for reducing the wear rate of the grinding gear 212.

[0026] Furthermore, in this embodiment of the invention, multiple teeth 2121 are arranged at intervals along the circumference of the grinding gear 212, and the teeth 2121 of adjacent gears are staggered. This arrangement allows the teeth 2121 of adjacent gears to work together to crush and grind dry ice, which is beneficial to improving the crushing effect of the grinding assembly 20 on dry ice.

[0027] In one feasible embodiment, bearings are provided at both ends of the groove 221, and the two ends of the rotating shaft 211 are movably mounted on the bearings, thereby enabling the rotating shaft 211 to connect and cooperate with the filter section 22. This allows the grinding section 21 and the filter section 22 to be combined and connected into a single structure, which improves the ease of assembly and disassembly of the grinding assembly 20 within the housing assembly 10. One end of the rotating shaft 211 can pass through the side of the filter section 22 and extend outward, thereby facilitating the docking and cooperation between the rotating shaft 211 and the drive mechanism 41 outside the grinding assembly 20, enabling it to rotate under the drive of the drive mechanism 41.

[0028] like Figures 3 to 5 As shown, the processing cavity 11 of this utility model embodiment includes a mounting cavity 111 and a feeding cavity 112. The mounting cavity 111 is connected above the discharging cavity 12, and the filter part 22 is located on the bottom side of the mounting cavity 111. The mounting cavity 111 matches the size of the grinding assembly 20. The feeding cavity 112 is connected above the mounting cavity 111. The top side of the feeding cavity 112 has a feed port 1121 for dry ice to enter. The inner wall of the feeding cavity 112 has a guide surface 1122 that can guide the dry ice downward into the grinding assembly 20. With this configuration, blocky dry ice can first enter the feeding chamber 112 through the feed port 1121 at the top of the outer shell assembly 10. Then, the dry ice can move downward under the action of gravity and the guidance of the guide surface 1122 and enter the grinding assembly 20 installed in the mounting cavity 111. Thus, the grinding assembly 20 in the mounting cavity 111 can crush and grind the blocky dry ice to obtain granular dry ice with a smaller particle size.

[0029] Specifically, in this embodiment, the guide surface 1122 can be arranged in two inclined sections, having a first guide section and a second guide section inclined relative to the vertical direction, and the angle between the first guide section and the vertical direction can be smaller than the angle between the second guide section and the vertical direction. Of course, the technical solution of this utility model is not limited to this. In other embodiments, the guide surface 1122 can also be arranged in one inclined section, or the guide surface 1122 can also be arranged in an arc shape, etc. The specific implementation can be set according to actual needs and is not limited here.

[0030] like Figures 3 to 4 As shown, the discharge chamber 12 of this embodiment includes a first connecting chamber 121 and a second connecting chamber 122 connected vertically. The first connecting chamber 121 is connected to the lower part of the processing chamber 11. The granular dry ice machine 100 also includes a feeding assembly 30, which has a roller 31. The roller 31 is movably disposed between the first connecting chamber 121 and the second connecting chamber 122. The roller 31 has a feeding groove 311 circumferentially provided. The roller 31 can rotate around its axial direction so that the feeding groove 311 sequentially docks with the first connecting chamber 121 and the second connecting chamber 122, thereby driving the dry ice to transfer from the first connecting chamber 121 to the second connecting chamber 122. This arrangement helps to avoid blockage and accumulation of granular dry ice in the discharge chamber 12, and helps to ensure the smooth discharge of granular dry ice.

[0031] The roller 31 of the feeding assembly 30 can be connected to the drive assembly 40 for transmission, so that it can rotate along its axial direction under the drive of the drive assembly 40; by controlling the rotation speed of the roller 31, the feeding speed of the granular dry ice to the discharge chamber 12 can be adjusted.

[0032] In some embodiments, the roller 31 may be provided with a plurality of feeding grooves 311 in the circumferential direction. The feeding grooves 311 extend along the axial direction of the roller 31, and the plurality of feeding grooves 311 are arranged at intervals in the circumferential direction of the roller 31. This arrangement is beneficial to improving the feeding efficiency of the roller 31 for granular dry ice.

[0033] like Figures 3 to 4 As shown, the second connecting cavity 122 of this utility model embodiment is provided with a partition plate 1123 extending in the vertical direction. The partition plate 1123 can divide the first connecting cavity 121 into a first chamber 1221 and a second chamber 1222. The tops of the first chamber 1221 and the second chamber 1222 are respectively connected to the first connecting cavity 121. The cavity wall of the first chamber 1221 is provided with an airflow inlet 1221a, and the cavity wall of the second chamber 1222 is provided with a jet outlet 1222a.

[0034] The air inlet 1221a can be connected to the input end of the air compressor, and the spray outlet 1222a can be connected to the spray channel of the spray mechanism. With this configuration, the air compressor can input high-pressure air into the first chamber 1221 through the air inlet 1221a. When the feeding trough 311 is connected to the first chamber 1221 and the second chamber 1222 respectively, the high-pressure air can flow sequentially through the first chamber 1221 and the second chamber 1222, thereby mixing the high-pressure air with the granular dry ice in the second connecting chamber 122. This mixture then drives the granular dry ice from the spray outlet 1222a into the spray channel of the spray mechanism, and subsequently sprays it at high speed onto the surface of the workpiece to be cleaned, removing foreign matter from the workpiece surface.

[0035] It should be noted that, since the dry ice pellet machine 100 of this invention can produce dry ice pellets with small particle sizes, it is beneficial to reduce the requirements of the dry ice pellet machine 100 for air pressure and airflow. In one feasible embodiment, the dry ice pellet machine 100 of this invention can operate in an air pressure range of 0.1 to 0.8 Pa, making it highly adaptable.

[0036] like Figure 2 As shown, the dry ice machine 100 of this utility model embodiment further includes a drive assembly 40, which includes a drive mechanism 41 and a transmission mechanism 42. The drive mechanism 41 includes a drive member 411 and a drive shaft 412. The drive shaft 412 is coaxially arranged with and connected to the rotating shaft 211. The drive member 411 is used to drive the drive shaft 412 to rotate along its axial direction, so as to drive the rotating shaft 211 to rotate synchronously. The transmission mechanism 42 includes a transmission shaft 421, a first transmission gear 422 and a second transmission gear 423. The transmission shaft 421 is coaxially arranged with the roller 31. The first transmission gear 422 and the second transmission gear 423 are respectively arranged on the drive shaft 412 and the transmission shaft 421, and the first transmission gear 422 and the second transmission gear 423 are meshed and connected so that the drive shaft 412 can drive the transmission shaft 421 and the roller 31 to rotate synchronously.

[0037] The drive shaft 412 and the rotating shaft 211 can be connected coaxially by inserting their ends together, or by a coupling, but not limited to this connection. Similarly, the transmission shaft 421 and the roller 31 can be connected coaxially by inserting their ends together, or by a coupling, but not limited to this connection. The drive element 411 can be, but not limited to, a drive motor. Specifically, when the drive shaft 412 rotates under the drive of the drive element 411, it drives the first transmission gear 422 to rotate, which in turn drives the second transmission gear 423 meshing with it to rotate, and then the second transmission gear 423 drives the transmission shaft 421 and the roller 31 mating with the transmission shaft 421 to rotate. Therefore, the technical solution of this utility model only requires a single drive element 411 to drive the rotating shaft 211 and the roller 31 to rotate synchronously. Furthermore, the technical solution of this utility model can also control the transmission ratio between the first transmission gear 422 and the second transmission gear 423 to make the rotation speed of the rotating shaft 211 and the roller 31 the same or in a preset ratio.

[0038] Of course, the technical solution of this utility model is not limited to this. In other embodiments, the drive mechanism 41 may also be provided with two drive members 411 to drive the rotating shaft 211 and the roller 31 to rotate respectively, so as to control the rotation speed of the rotating shaft 211 and the roller 31 respectively. This allows for the separate adjustment of the grinding component 20's particle crushing efficiency of dry ice and the feeding component 30's feeding efficiency of granular dry ice.

[0039] This utility model also proposes a dry ice blasting device, which includes an air compressor, a blasting mechanism, and a granular dry ice machine 100. The specific structure of the granular dry ice machine 100 is as described in the above embodiments. Since this dry ice blasting device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0040] In some embodiments, the spraying mechanism may also be equipped with a flow valve at the spraying channel to control the amount of dry ice sprayed by the dry ice spraying device.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A pellet dry ice machine, characterized in that, The assembly includes a housing assembly and a grinding assembly. The housing assembly has a processing chamber and a discharge chamber that are connected in a vertical direction. The processing chamber is located on the top side of the discharge chamber. The grinding assembly includes: A filtration section is positioned between the processing chamber and the discharge chamber. The filtration section has multiple sieve holes spaced apart and extending through it. The grinding section is located above the filtering section. The grinding section includes a rotating shaft and multiple grinding gears. The rotating shaft is movably inserted into the processing chamber. The multiple grinding gears are located on the rotating shaft and arranged side by side along the axial direction of the rotating shaft. The rotating shaft can drive the multiple grinding gears to rotate synchronously around the axial direction of the rotating shaft, so that the multiple grinding gears can grind the dry ice trapped on the filtering section, thereby allowing the ground granular dry ice to pass through the sieve holes and enter the discharge chamber.

2. The granular dry ice machine according to claim 1, characterized in that, The grinding assembly has a groove with a top opening, and the filter part is formed at the bottom of the groove. The grinding part is movably disposed in the groove and spaced apart from the groove wall.

3. The granular dry ice machine according to claim 2, characterized in that, The groove has a semi-circular cross-section in the radial direction of the rotating shaft.

4. The granular dry ice machine according to claim 1, characterized in that, The grinding gear has multiple teeth along its circumference, and the teeth have arc-shaped concave surfaces and arc-shaped convex surfaces arranged opposite to each other.

5. The granular dry ice machine according to claim 4, characterized in that, Multiple teeth are spaced apart along the circumference of the grinding gear, and the teeth of two adjacent gears are staggered.

6. The pellet dry ice machine according to any one of claims 1 to 5, characterized in that, The processing cavity includes: The mounting cavity is connected above the discharge cavity, the filter section is located on the bottom side of the mounting cavity, and the mounting cavity is sized to match the grinding assembly; and The feeding chamber is connected above the mounting chamber. The top side of the feeding chamber has a feed port for dry ice to enter. The inner wall of the feeding chamber has a guide surface that can guide the dry ice downward into the grinding assembly.

7. The pellet dry ice machine according to any one of claims 1 to 5, characterized in that, The discharge chamber includes a first connecting chamber and a second connecting chamber that are connected vertically, and the first connecting chamber is connected to the lower part of the processing chamber; The granular dry ice machine also includes a feeding assembly, which has a roller that is movably disposed between the first connecting cavity and the second connecting cavity. The roller has a feeding groove in its circumferential direction and can rotate around its axial direction so that the feeding groove sequentially docks with the first connecting cavity and the second connecting cavity, thereby driving the granular dry ice to transfer from the first connecting cavity to the second connecting cavity.

8. The granular dry ice machine according to claim 7, characterized in that, The second connecting cavity is provided with a partition plate extending in a vertical direction. The partition plate can divide the first connecting cavity into a first chamber and a second chamber. The tops of the first chamber and the second chamber are respectively connected to the first connecting cavity. The cavity wall of the first chamber is provided with an airflow inlet, and the cavity wall of the second chamber is provided with a jet outlet.

9. The granular dry ice machine according to claim 7, characterized in that, The granular dry ice machine also includes a drive assembly, which comprises: A drive mechanism, comprising a drive element and a drive shaft, wherein the drive shaft is coaxially arranged with and connected to the rotating shaft, and the drive element is used to drive the drive shaft to rotate axially thereon, thereby causing the rotating shaft to rotate synchronously; and The transmission mechanism includes a transmission shaft, a first transmission gear, and a second transmission gear. The transmission shaft is coaxially arranged with the roller. The first transmission gear and the second transmission gear are respectively located on the drive shaft and the transmission shaft, and the first transmission gear and the second transmission gear are meshed together so that the drive shaft can drive the transmission shaft and the roller to rotate synchronously.

10. A dry ice blasting device, characterized in that, The invention includes an air compressor, a spraying mechanism, and a pellet dry ice machine according to any one of claims 1 to 9, wherein the spraying mechanism has a spraying channel, the air compressor, the discharge chamber, and the spraying channel are sequentially connected, and the air compressor is capable of driving the dry ice in the discharge chamber to be output outward through the spraying channel.

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