Dry ice cleaning device for a shoe mold

Abstract

The present invention relates to a dry ice cleaning device for a shoe mold in the technical field of dry ice cleaning. It includes an installation box, and a device for driving the mixing and spraying of dry ice particles and high-pressure air is arranged in the installation box. This device is connected to a support pipe, and the support pipe extends outside the installation box and is connected to a delivery hose for spraying; one end of the delivery hose away from the support pipe is connected to a fixed pipe, and a plurality of cooling pipes are evenly arranged in a circumferential split manner around the central axis in the fixed pipe. One end of the cooling pipe is connected to the delivery hose, and the other end is connected to a capillary tube with an inner diameter smaller than that of the cooling pipe; one end of the fixed pipe is connected to a plurality of capillary tubes, and the other end is connected to a second mixing pipe with a conical structure, and the inner diameter of the end of the second mixing pipe away from the fixed pipe is smaller than the inner diameter of the end adjacent to the fixed pipe. By setting the capillary tube, the mixture of dry ice particles and high-pressure air flow is further cooled and accelerated when entering the capillary tube by using the Joule-Thomson effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dry ice cleaning, and more specifically, to a dry ice cleaning device for shoe molds. Background Art

[0002] After a shoe mold has been used for a period of time, it needs to be cleaned and maintained to increase its service life. Generally, the cleaning of the mold is carried out by a dry ice cleaning device, which impacts surface dirt with dry ice particles at supersonic speed, generating a micro-explosion (kinetic impact). When dry ice contacts a high-temperature surface, it sublimates instantly (CO2 changes from solid to gas), with its volume expanding by about 800 times, stripping the dirt. Moreover, the temperature difference effect makes the dirt brittle and easier to detach.

[0003] In actual use, the dry ice device mixes high-pressure air with dry ice particles produced by a dry ice granulation device through an air compression device and sprays them onto the mold through a spray gun. However, since the spray gun needs to be connected to a long pipe, when the dry ice particles and high-pressure air exchange heat during the transportation through the long pipe and reach the spraying end, the temperature of the mixture of high-pressure air and dry ice particles will rise, thereby affecting the cleaning effect. Moreover, after being transported through the long pipe, the speed of the dry ice particles and high-pressure air sprayed out through the spray gun also decreases, further affecting the cleaning effect. Summary of the Invention

[0004] To solve the problems raised in the background art, the present invention provides a dry ice cleaning device for shoe molds, which includes an installation box. Inside the installation box, there is a device for driving the mixing and spraying of dry ice particles and high-pressure air. This device is connected to a support pipe, and the support pipe extends outside the installation box and is connected to a delivery hose for spraying.

[0005] One end of the delivery hose away from the support pipe is connected to a fixed pipe. Inside the fixed pipe, a number of cooling pipes are evenly arranged in a circumferential split manner around its central axis. One end of the cooling pipe is connected to the delivery hose, and the other end is connected to a capillary tube much smaller in inner diameter than the cooling pipe.

[0006] One end of the fixed pipe is connected to a number of the capillary tubes, and the other end is connected to a second mixing pipe with a conical structure. Moreover, the inner diameter of the end of the second mixing pipe away from the fixed pipe is smaller than the inner diameter of the end adjacent to the fixed pipe.

[0007] A number of spiral grooves are evenly formed around the central axis inside the second mixing pipe.

[0008] As a further improvement of the technical solution, a dry ice storage box is provided at the bottom of the installation box. A dry ice granulation device and an air compression device that communicate with each other are provided in the installation box. A dry ice particle and high-pressure air mixing system is further provided on one side of the air compression device. The support pipe is fixedly arranged on one side of the installation box and communicates with the mixing system of the air compression device.

[0009] As a further improvement of the technical solution, an installation clamping ring is fixedly arranged at one end of the conveying hose away from the support pipe. The conveying hose communicates with the fixed pipe through the installation clamping ring. An installation disc adapted to the inner diameter of the installation clamping ring is fixedly connected in the installation clamping ring. A plurality of cooling pipes are fixedly connected to the installation disc.

[0010] As a further improvement of the technical solution, a vortex tube is fixedly arranged in the fixed pipe. The vortex tube divides the fixed pipe into a cooling chamber and a first mixing chamber;

[0011] Wherein the vortex tube has a conical structure, and the narrower end of the vortex tube communicates with the capillary tube. The wider end of the vortex tube is arranged away from the capillary tube and its outer diameter is adapted to the inner diameter of the fixed pipe.

[0012] Preferably, a plurality of cold flow pipes are fixedly arranged in a vortex structure around the center of the narrower end of the vortex tube, and the ports of the cold flow pipes away from the narrower end of the vortex tube are in contact with the inner wall of the vortex tube;

[0013] The ports of a plurality of the cold flow pipes near the narrower end of the vortex tube extend to the outside of the vortex tube and are correspondingly communicated with the capillary tube one by one.

[0014] As a further improvement of the technical solution, a second mixing chamber is formed in the second mixing pipe through a plurality of the spiral grooves;

[0015] One end of the first mixing chamber is communicated with the wider end of the vortex tube, and the other end is communicated with the second mixing chamber. The first mixing chamber has a cylindrical structure. A plurality of spiral grooves adapted to the spiral direction of the spiral grooves in the second mixing chamber are uniformly formed around the central axis in the first mixing chamber.

[0016] Preferably, a spray pipe is arranged at one end of the second mixing pipe away from the fixed pipe. One end of the spray pipe is communicated with the second mixing chamber, and the other end is arranged away from the second mixing pipe to form a rectangular spray port, and the area of the spray port is smaller than the area of the narrower end of the second mixing chamber.

[0017] As a further improvement of the technical solution, the vortex direction of the vortex structure formed by the ends of a plurality of the cold flow pipes located in the vortex tube is adapted to the spiral direction of the spiral grooves.

[0018] Preferably, the inner diameter of the end of the cold flow tube away from the capillary tube is greater than the inner diameter of the capillary tube.

[0019] As a further improvement of the technical solution, the length of the first mixing chamber is longer than the length of the second mixing chamber, and the inner wall of the wider end of the vortex tube is attached to the inner wall of the first mixing chamber.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the dry ice cleaning device for shoe molds provided by the present invention, by setting the combination of the cooling tube and the capillary tube, the mixture of dry ice particles and high-pressure air flow, whose temperature has decreased and speed has decreased after being transported through the long tube, increases its flow rate after entering the cooling tube, and further cools down and speeds up by using the Joule-Thomson effect when passing through the capillary tube, effectively making up for the loss of flow rate and temperature during the transportation process, being beneficial to maintaining the expansion ratio and kinetic energy of the dry ice particles, thereby improving the cleaning effect;

[0022] 2. In the dry ice cleaning device for shoe molds provided by the present invention, through the vortex structure cold flow tube arranged inside the vortex tube, the high-pressure air flow and dry ice particles after being processed by the capillary tube can form a vortex, which not only enhances the mixing effect of the air flow and dry ice particles, but also the formation of the vortex is beneficial to increasing the impact force and penetration force of the air flow and dry ice particles, thereby providing stronger power for the subsequent cleaning work;

[0023] 3. In the dry ice cleaning device for shoe molds provided by the present invention, by setting the connection between the first mixing chamber and the second mixing chamber, the air flow and dry ice particles after being processed by the vortex tube can be further rotated and mixed, which not only improves the mixing uniformity of the air flow and dry ice particles, but also is beneficial to maintaining the stability of the forward movement of the air flow and dry ice particles and increasing their kinetic energy through the guidance of the spiral groove, thereby further enhancing the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic diagram of the internal structure of the installation box of the present invention;

[0026] Figure 3 is a sectional view of the structure of the delivery hose of the present invention;

[0027] Figure 4 is a partial sectional view of the structure of the installation snap ring of the present invention;

[0028] Figure 5 is a schematic diagram of the internal structure of the cooling chamber of the present invention;

[0029] Figure 6 Schematic structural diagram of the cooling pipe of the present invention;

[0030] Figure 7 Schematic structural diagram of the vortex tube of the present invention;

[0031] Figure 8 Front view of the structural diagram of the vortex tube of the present invention;

[0032] Figure 9 Cross-sectional view of the structural diagram of the vortex tube of the present invention;

[0033] Figure 10 Cross-sectional view of the structural diagram of the first mixing chamber of the present invention;

[0034] Figure 11 Cross-sectional view of the structural diagram of the second mixing chamber of the present invention.

[0035] The meanings of each label in the figure are as follows:

[0036] 1. Installation box; 2. Dry ice storage box; 3. Dry ice granulation device; 4. Air compression device; 5. Support pipe; 6. Delivery hose; 7. Installation clamping ring; 8. Fixed pipe; 9. Second mixing pipe; 10. Spray pipe; 11. Cooling pipe; 12. Installation disc; 13. Capillary tube; 14. Cold flow pipe; 15. Vortex tube; 16. Cooling chamber; 17. First mixing chamber; 18. Spiral groove; 19. Second mixing chamber. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] In the existing dry ice cleaning technology during the long pipe transmission process, due to heat exchange, the temperature of the mixture rises and the speed decreases, thus affecting the cleaning effect.

[0039] Therefore, the present invention provides a dry ice cleaning device for shoe molds, as shown in Figures 1 - 2 shown, which includes an installation box 1, a dry ice storage box 2 is arranged at the bottom of the installation box 1, a dry ice granulation device 3 and an air compression device 4 that are interconnected are arranged in the installation box 1, a dry ice particle and high-pressure air mixing system is also arranged on one side of the air compression device 4, and a support pipe 5 connected to the mixing system of the air compression device 4 is fixedly arranged on one side of the installation box 1.

[0040] When the device is in use, the dry ice in the dry ice storage box 2 can be granulated by the dry ice granulation device 3, and then mixed with the high-pressure air flow generated by the air compression device 4 and sprayed out at high speed through the support pipe 5. The above is the existing mature technology and will not be elaborated here.

[0041] Specifically, as shown in Figure 3 and Figure 4 As shown, the support pipe 5 extends to the outside of the installation box 1 and is connected to a delivery hose 6. One end of the delivery hose 6 away from the support pipe 5 is fixedly provided with an installation clamping ring 7. The delivery hose 6 is connected to a fixed pipe 8 through the installation clamping ring 7. An installation disk 12 adapted to the inner diameter of the installation clamping ring 7 is fixedly connected inside the installation clamping ring 7. A number of cooling pipes 11 are evenly arranged in a circumferential split manner around the central axis on the installation disk 12. One end of the cooling pipe 11 is connected to the delivery hose 6, and the other end is connected to a capillary 13 much smaller than the inner diameter of the cooling pipe 11.

[0042] Among them, when the dry ice particles and the high-pressure air flow sprayed through the support pipe 5 reach the position of the installation clamping ring 7 after being transported through the long delivery hose 6, the temperature decreases and the speed also decreases. According to the principle of dry ice cleaning, when the temperature drops and the speed decreases, the expansion ratio and kinetic energy of the dry ice particles will correspondingly decrease. Therefore, the cleaning effect will decrease. When the mixture of the high-pressure air flow and the dry ice particles is transported to the position of the installation disk 12, due to the sealing of the installation disk 12, the air flow carrying the dry ice particles will enter through the cooling pipes 11. Since there are a number of cooling pipes 11 on the installation disk 12, the contact between the air flow and the particles and other places can be minimized as much as possible, and they can enter directly through the cooling pipes 11 as much as possible. At the same time, the inner diameter of the cooling pipe 11 is definitely smaller than that of the delivery hose 6. Therefore, the air flow speed in the cooling pipe 11 will increase at this time. When the air flow and the dry ice particle mixture in the cooling pipe 11 flow through the capillary 13, according to the Joule-Thomson effect, when the gas passes through the throttling device, due to the sudden drop in pressure, the temperature will drop sharply, and the flow rate will further increase. Thus, in this scenario, by means of the flow rate of the high-pressure air flow in the delivery hose 6 itself, after passing through the cooling pipe 11 and the capillary 13, while the flow rate is increased, the temperature of the high-pressure air flow passing through the capillary 13 is also reduced, so as to further reduce the temperature of the dry ice particles, and thus make up for the loss of flow rate and temperature caused by the transportation of the delivery hose 6.

[0043] That is to say, the capillary 13 cools down through throttling. When the high-pressure air flow carrying the dry ice particles enters the capillary 13 through the cooling pipe 11, the Joule-Thomson effect is utilized to achieve a sudden drop in pressure, a sharp drop in the air flow temperature (compensating for the temperature rise during transmission), and an increase in the flow rate (compensating for the kinetic energy loss).

[0044] Furthermore, as shown in Figure 4 and Figure 5As shown, an eddy current tube 15 is fixedly arranged in a fixed tube 8. The eddy current tube 15 divides the fixed tube 8 into a cooling chamber 16 and a first mixing chamber 17. One end of the first mixing chamber 17 is communicated with the eddy current tube 15, and the other end is communicated with a second mixing tube 9 having a conical structure. The inner diameter of the end of the second mixing tube 9 far from the fixed tube 8 is smaller than that of the end adjacent to the fixed tube 8.

[0045] Among them, as Figure 5 , Figures 7 - 9 shown, the eddy current tube 15 has a conical structure. A plurality of cold flow tubes 14 are fixedly arranged in a vortex structure around the center of the narrower end of the eddy current tube 15. The port of the cold flow tube 14 far from the narrower end of the eddy current tube 15 is attached to the inner wall of the eddy current tube 15. The ports of the plurality of cold flow tubes 14 adjacent to the narrower end of the eddy current tube 15 extend outside the eddy current tube 15 and are correspondingly communicated with capillary tubes 13 one by one. Moreover, the inner diameter of the end of the cold flow tube 14 far from the capillary tube 13 is larger than that of the capillary tube 13. Through the design that the inner diameter of the cold flow tube 14 is larger than that of the capillary tube 13, the throttling pressure drop and the eddy current resistance are balanced to avoid air flow oscillation.

[0046] That is to say, through cold flow concentration in the eddy current tube 15, the cooled mixed fluid flows into the eddy current tube 15 through the cold flow tube 14. The vortex structure of the cold flow tube 14 guides the air flow to spiral along the inner wall of the eddy current tube 15, forming a low-temperature vortex, enhancing the concentration of low-temperature gas and the mixing efficiency.

[0047] It can be seen that after the high-pressure air flow and dry ice particles are cooled and the flow rate is increased through the capillary tube 13 and then pass through a plurality of cold flow tubes 14 with a vortex structure, and then by virtue of the structure of the eddy current tube 15 itself, a vortex will be formed. Because a plurality of cold flow tubes 14 have a vortex structure and the injection end is attached to the inner wall of the eddy current tube 15, the air flow will spiral forward along the inner wall of the eddy current tube 15.

[0048] Furthermore, referring to Figures 10 - 11 shown, a second mixing chamber 19 is formed in the second mixing tube 9 through a plurality of spiral grooves 18; and one end of the first mixing chamber 17 is communicated with the wider end of the eddy current tube 15, and the other end is communicated with the second mixing chamber 19. The first mixing chamber 17 has a cylindrical structure. A plurality of spiral grooves 18 adapted to the spiral direction of the spiral grooves 18 in the second mixing chamber 19 are uniformly opened around the central axis in the first mixing chamber 17;

[0049] Among them, the vortex direction of the vortex structure formed by the ends of the plurality of cold flow tubes 14 located in the eddy current tube 15 is adapted to the spiral direction of the spiral grooves 18. The length of the first mixing chamber 17 is longer than that of the second mixing chamber 19, which can provide space and time for the mixing of the air flow and dry ice particles, compensate for the insufficient mixing in the eddy current tube 15, and the inner wall of the wider end of the eddy current tube 15 is attached to the inner wall of the first mixing chamber 17.

[0050] That is, through the double-stage mixing chamber (the first mixing chamber 17 and the second mixing chamber 19), the first mixing chamber 17 guides the rotating air flow output from the vortex tube 15 through the spiral groove 18 to further mix with the dry ice particles, increasing the uniformity; the conical structure of the second mixing chamber 19 accelerates the flow rate of the mixture. The direction of the spiral groove 18 is consistent with the vortex direction of the vortex tube 15, avoiding centrifugal dispersion and maintaining the linear impact kinetic energy.

[0051] Combined with the above, since the mixing of dry ice particles and air flow will change after being transported through the delivery hose 6, in order to improve the cleaning effect, it is necessary to further increase the mixing of dry ice particles and air flow. The air flow and dry ice particles ejected from the vortex tube 15 will form a vortex. When this vortex passes through the first mixing chamber 17, it is equivalent to a bullet entering the rifling and will further rotate. Then the high-pressure air flow and dry ice will also rotate forward. Inside the first mixing chamber 17, the air flow and dry ice particles rotate simultaneously, which is equivalent to stirring the air flow and dry ice particles. (The main mixing is concentrated inside the vortex tube 15). Since the length of the first mixing chamber 17 is not too long, and the forward flow rates of the air flow and dry ice particles are extremely high, the rotation speed of the air flow and dry ice particles will not be too fast, and the centrifugal force will not be too large either. Therefore, in this stage, only the mixing state of the air flow and dry ice particles will be increased, and the dry ice particles will not be thrown towards the inner wall of the first mixing chamber 17. In this way, on the one hand, the mixing of the air flow and dry ice particles can be improved, and on the other hand, the stability of the forward movement of the air flow and dry ice particles can be enhanced, enabling a linear impact and increasing their kinetic energy, thereby increasing the cleaning effect.

[0052] Similarly, when the air flow and dry ice particles are rotationally mixed through the first mixing chamber 17 and then further rotationally mixed after passing through the second mixing chamber 19, the conical structure of the second mixing chamber 19 further increases the flow rate of the air flow and dry ice particles.

[0053] In addition, a spray pipe 10 is provided at one end of the second mixing pipe 9 away from the fixed pipe 8. One end of the spray pipe 10 is connected to the second mixing chamber 19, and the other end is set away from the second mixing pipe 9 to form a rectangular spray port, and the area of the spray port is smaller than the area of the narrower end of the second mixing chamber 19 and finally passes through the narrower through-port of the spray pipe 10. Finally, the air flow and dry ice particles accelerated by the second mixing chamber 19 are sprayed onto the mold for cleaning through the smaller spray port of the spray pipe 10.

[0054] That is, through the terminal kinetic energy focusing of the spray pipe 10, after the mixture flows through the second mixing chamber 19 and is accelerated, it enters the spray pipe 10 through the conical second mixing pipe 9. The rectangular spray port realizes a secondary increase in the jet velocity through cross-sectional compression, and at the same time expands the cleaning coverage area.

[0055] Combined with the above, the temperature and velocity compensation are first achieved: Firstly, the throttling effect of the capillary tube 13 realizes a sudden drop in the temperature of the air flow (compensating for the temperature rise during transmission) and an increase in the flow velocity (compensating for the kinetic energy loss) through the Joule-Thomson effect; Secondly, the concentration and mixing of the cold flow in the vortex tube 15: The cold flow tube 14 guides the low-temperature air flow to spiral along the inner wall of the vortex tube, enhancing the concentration of the low-temperature gas and the subsequent mixing of the air flow with the dry ice particles. Secondly, the mixing enhancement mechanism is achieved: Firstly, the double-stage mixing chamber, the spiral groove 18 of the first mixing chamber 17 and the conical acceleration structure of the second mixing chamber 19 form a rotating mixing flow field, improving the uniformity and kinetic energy density of the dry ice particles and the air flow; Secondly, the vortex synergy effect, the vortex direction of the cold flow tube 14 is consistent with the direction of the spiral groove of the mixing chamber, avoiding the particle dispersion caused by the centrifugal force and maintaining the linear impact kinetic energy; Finally, the terminal kinetic energy focusing is achieved: The cross-section of the injection tube 10 is optimized, and the rectangular injection port realizes a secondary increase in the jet velocity through area compression, while the rectangular cross-section expands the cleaning coverage.

[0056] That is to say, aiming at the problems of temperature rise and kinetic energy attenuation caused by long-tube transmission, a closed-loop solution is formed through a three-stage compensation mechanism (throttling and cooling of the capillary tube 13, vortex mixing of the vortex tube 15, and kinetic energy enhancement of the mixing chamber), and then combined with the cooling tube 11 and the capillary tube 13 to form a flow velocity-temperature joint adjustment module, and the vortex tube 15 and the mixing chamber form a kinetic energy gradient enhancement system.

[0057] To sum up, through long-tube transmission temperature rise / kinetic energy loss → capillary tube 13 throttling compensation → vortex tube 15 mixing → double-stage mixing chamber kinetic energy enhancement → terminal jet focusing, that is, by means of gradually progressive physical effects (throttling expansion, vortex mixing, spiral kinetic energy enhancement), the full-process compensation of energy loss is realized, and then the problem that the existing dry ice cleaning technology affects the cleaning effect due to the increase in the temperature and the decrease in the speed of the mixture caused by heat exchange during the long-tube transmission process is effectively solved.

[0058] Working principle:

[0059] The dry ice in the dry ice storage box 2 is granulated by the dry ice granulation device 3 and mixed with the high-pressure air flow generated by the air compression device 4 in the mixing system. When the mixture is transported to the installation snap ring 7 through the delivery hose 6, its temperature and speed decrease. At this time, the mixture enters the cooling pipe 11, and then throttles through the capillary 13. The Joule-Thomson effect is utilized to achieve a sudden temperature drop and a flow rate increase, compensating for the temperature rise and kinetic energy loss during the transmission process. The mixture passing through the capillary 13 enters the cold flow pipe 14 with a vortex structure and then enters the vortex tube 15 to form a vortex. The design of the vortex tube 15 enables the mixture to spiral forward along the inner wall, enhancing the concentration of the low-temperature gas and the mixing effect; the mixture enters the first mixing chamber 17, and its spiral groove 18 and the conical acceleration structure of the second mixing chamber 19 form a rotating mixing flow field, improving the uniformity and kinetic energy density of the dry ice particles and the air flow. At the same time, the vortex direction of the cold flow pipe 14 is consistent with the spiral groove direction of the mixing chamber, and the overall length is relatively short, avoiding the particle dispersion caused by the centrifugal force; the mixture strengthened by the double-stage mixing chamber is ejected through the rectangular ejection port of the ejection pipe 10. The area of the ejection port is smaller than the area of the narrower end of the second mixing chamber 19, realizing a secondary increase in the jet velocity and expanding the cleaning coverage range.

[0060] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry ice cleaning device for a shoe mold, which comprises an installation box (1). A device for driving the mixing and spraying of dry ice particles and high-pressure air is arranged in the installation box (1). The device is communicated with a support pipe (5). The support pipe (5) extends to the outside of the installation box (1) and is communicated with a delivery hose (6) for spraying. It is characterized in that: One end of the delivery hose (6) far from the support pipe (5) is communicated with a fixed pipe (8). A plurality of cooling pipes (11) are evenly arranged in a circumferentially split manner around the central axis of the fixed pipe (8). One end of the cooling pipe (11) is communicated with the delivery hose (6), and the other end is communicated with a capillary pipe (13); One end of the fixed pipe (8) is communicated with a plurality of the capillary pipes (13). The other end of the fixed pipe (8) is communicated with a second mixing pipe (9) with a conical structure. The inner diameter of the end of the second mixing pipe (9) far from the fixed pipe (8) is smaller than the inner diameter of the end adjacent to the fixed pipe (8); A plurality of spiral grooves (18) are evenly formed around the central axis of the second mixing pipe (9); An eddy current tube (15) is fixedly arranged in the fixed pipe (8). The eddy current tube (15) divides the fixed pipe (8) into a cooling chamber (16) and a first mixing chamber (17). The eddy current tube (15) has a conical structure. The narrower end of the eddy current tube (15) is communicated with the capillary pipe (13). The wider end of the eddy current tube (15) is arranged far from the capillary pipe (13) and its outer diameter is adapted to the inner diameter of the fixed pipe (8); A plurality of cold flow pipes (14) are fixedly arranged in a vortex structure around the center of the narrower end of the eddy current tube (15). The ports of the cold flow pipes (14) far from the narrower end of the eddy current tube (15) are attached to the inner wall of the eddy current tube (15). The ports of a plurality of the cold flow pipes (14) adjacent to the narrower end of the eddy current tube (15) extend to the outside of the eddy current tube (15) and are respectively communicated with the capillary pipes (13); A second mixing chamber (19) is formed in the second mixing pipe (9) through a plurality of the spiral grooves (18). One end of the first mixing chamber (17) is communicated with the wider end of the eddy current tube (15). The other end of the first mixing chamber (17) is communicated with the second mixing chamber (19). The first mixing chamber (17) has a cylindrical structure. A plurality of spiral grooves (18) are evenly formed around the central axis of the first mixing chamber (17). The spiral grooves (18) in the first mixing chamber (17) are adapted to the spiral direction of the spiral grooves (18) in the second mixing chamber (19).

2. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: A dry ice storage box (2) is arranged at the bottom of the installation box (1). A dry ice granulation device (3) and an air compression device (4) which are communicated with each other are arranged in the installation box (1). A dry ice particle and high-pressure air mixing system is also arranged on one side of the air compression device (4). The support pipe (5) is fixedly arranged on one side of the installation box (1) and is communicated with the mixing system of the air compression device (4).

3. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: One end of the conveying hose (6) far from the support pipe (5) is fixedly provided with an installation clamping ring (7). The conveying hose (6) is communicated with a fixed pipe (8) through the installation clamping ring (7). An installation disc (12) adapted to the inner diameter of the installation clamping ring (7) is fixedly connected inside the installation clamping ring (7). A plurality of the cooling pipes (11) are fixedly connected to the installation disc (12).

4. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: One end of the second mixing pipe (9) far from the fixed pipe (8) is provided with a spray pipe (10). One end of the spray pipe (10) is communicated with the second mixing chamber (19), and the other end is far from the second mixing pipe (9) to form a spray port with a rectangular structure, and the area of the spray port is smaller than the area of the narrower end of the second mixing chamber (19).

5. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: The vortex direction of the vortex structure formed by one ends of a plurality of the cold flow pipes (14) located inside the vortex tube (15) is adapted to the spiral direction of the spiral groove (18).

6. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: The inner diameter of one end of the cold flow pipe (14) far from the capillary tube (13) is larger than the inner diameter of the capillary tube (13).

7. The dry ice cleaning device for the shoe mold according to claim 1, characterized in that: The length of the first mixing chamber (17) is longer than the length of the second mixing chamber (19), and the inner wall of the wider end of the vortex tube (15) is attached to the inner wall of the first mixing chamber (17).

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