Dry ice cleaning device for shoe mold

Abstract

The invention relates to a dry ice cleaning device for a shoe mold in the technical field of dry ice cleaning, which comprises a mounting box, a device for driving dry ice particles and high-pressure air to be mixed and sprayed is arranged in the mounting box, the device is communicated with a supporting pipe, and the supporting pipe extends to the outside of the mounting box and is communicated with a conveying hose for spraying; the end, away from the supporting pipe, of the conveying hose communicates with a fixing pipe, a plurality of cooling pipes are evenly arranged in the fixing pipe in a circumferential split mode around the central axis of the fixing pipe, one end of each cooling pipe communicates with the conveying hose, and the other end of each cooling pipe communicates with a capillary pipe with the inner diameter smaller than that of the corresponding cooling pipe. One end of the fixing pipe is communicated with the capillary tubes, the other end of the fixing pipe is communicated with a second mixing pipe with a conical structure, and the inner diameter of one end of the second mixing pipe away from the fixing pipe is smaller than that of one end close to the fixing pipe. The capillary tube is arranged, so that the dry ice particles and the high-pressure airflow mixture are further cooled and accelerated by utilizing the Joule-Thomson effect when entering the capillary tube.

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 is 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 the 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 (from solid state → gaseous state), with its volume expanding by about 800 times, stripping the dirt, and the temperature difference effect makes the dirt brittle and easier to detach. 2 From solid state → gaseous state), the volume expands by about 800 times, stripping the dirt, and 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 generated 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 in 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 ejected 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. A device for driving the mixing and spraying of dry ice particles and high-pressure air is arranged inside the installation box, and 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. 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. 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, 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. A number of spiral grooves are evenly formed around the central axis inside the second mixing pipe.

[0005] As a further improvement of this technical solution, a dry ice storage box is arranged at the bottom of the installation box. A dry ice granulation device and an air compression device that are interconnected are arranged inside the installation box. A dry ice particle and high-pressure air mixing system is also arranged on one side of the air compression device, and the support pipe is fixedly arranged on one side of the installation box and is connected to the mixing system of the air compression device.

[0006] As a further improvement of the technical solution, an installation clamping ring is fixedly provided at one end of the conveying hose away from the support pipe. The conveying hose is communicated 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 inside the installation clamping ring. A plurality of the cooling pipes are fixedly connected to the installation disc.

[0007] As a further improvement of the technical solution, a vortex tube is fixedly provided inside the fixed pipe. The vortex tube divides the fixed pipe into a cooling chamber and a first mixing chamber. Wherein the vortex tube has a conical structure, and the narrower end of the vortex tube is communicated 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.

[0008] 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 attached to the inner wall of the vortex tube. 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.

[0009] 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. 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.

[0010] 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.

[0011] 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 inside the vortex tube is adapted to the spiral direction of the spiral grooves.

[0012] Preferably, the inner diameter of the end of the cold flow pipe away from the capillary tube is larger than the inner diameter of the capillary tube.

[0013] 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.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the dry ice cleaning device of the shoe mold provided by the present invention, through the combination of the cooling pipe and the capillary tube, the mixture of dry ice particles and high-pressure air flow with a decreased temperature and a reduced speed after being transported through the long pipe increases its flow rate after entering the cooling pipe, and further cools down and accelerates when passing through the capillary tube by using the Joule-Thomson effect, effectively compensating for the losses of flow rate and temperature during the transportation process, which is beneficial to maintaining the expansion ratio and kinetic energy of the dry ice particles, thereby improving the cleaning effect; 2. In the dry ice cleaning device of the shoe mold provided by the present invention, through the vortex structure cold flow pipe 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 power of the air flow and dry ice particles, thereby providing stronger power for the subsequent cleaning work; 3. In the dry ice cleaning device of the shoe mold provided by the present invention, through the connection of 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 air flow and dry ice particles during forward movement and increasing their kinetic energy through the guidance of the spiral groove, thereby further improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the internal structure of the installation box of the present invention; Figure 3 is a sectional view of the structure of the delivery hose of the present invention; Figure 4 is a partial sectional view of the structure of the installation snap ring of the present invention; Figure 5 is a schematic diagram of the internal structure of the cooling chamber of the present invention; Figure 6 is a schematic diagram of the structure of the cooling pipe of the present invention; Figure 7 is a schematic diagram of the structure of the vortex tube of the present invention; Figure 8 is a front view of the structure of the vortex tube of the present invention; Figure 9 is a sectional view of the structure of the vortex tube of the present invention; Figure 10 is a sectional view of the structure of the first mixing chamber of the present invention; Figure 11 is a sectional view of the structure of the second mixing chamber of the present invention.

[0016] The meanings of the reference numerals in the figure are as follows: 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 plate; 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 implementation mode

[0017] 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.

[0018] 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.

[0019] Therefore, the present invention provides a dry ice cleaning device for shoe molds. Refer to Figures 1 - 2 As shown, it 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 connected to 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. A support pipe 5 communicating with the mixing system of the air compression device 4 is fixedly arranged on one side of the installation box 1.

[0020] 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.

[0021] Specifically, refer to 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. An installation clamping ring 7 is fixedly arranged at one end of the delivery hose 6 away from the support pipe 5. The delivery hose 6 is connected to a fixed pipe 8 through the installation clamping ring 7. An installation plate 12 adapted to the inner diameter of the installation clamping ring 7 is fixedly connected in the installation clamping ring 7. A plurality of cooling pipes 11 are evenly arranged in a circumferential split manner around the central axis on the installation plate 12. One end of the cooling pipe 11 is connected to the delivery hose 6, and the other end is connected to a capillary tube 13 much smaller than the inner diameter of the cooling pipe 11.

[0022] Among them, when the dry ice particles and high-pressure air flow ejected through the support pipe 5 reach the position of the mounting collar 7 after being transported through the long pipe conveying hose 6, the temperature drops 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 decline. When the mixture of high-pressure air flow and dry ice particles is transported to the position of the mounting plate 12, due to the sealing of the mounting plate 12, the air flow carrying the dry ice particles will enter through the cooling pipe 11. Since there are several cooling pipes 11 provided on the mounting plate 12, the contact between the air flow and the particles with other places can be minimized as much as possible, and they can enter directly through the cooling pipe 11 as much as possible. At the same time, the inner diameter of the cooling pipe 11 is definitely smaller than that of the conveying 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 conveying 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, thereby further reducing the temperature of the dry ice particles, and thus making up for the loss of flow rate and temperature caused by the transportation of the conveying hose 6.

[0023] That is to say, the capillary 13 cools down through throttling. When the high-pressure air flow carries the dry ice particles and 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 at the same time an increase in the flow rate (compensating for the kinetic energy loss).

[0024] Furthermore, as Figure 4 and Figure 5 shown, a vortex tube 15 is fixedly arranged in the fixed tube 8. The vortex 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 connected to the vortex tube 15, and the other end is connected to a second mixing tube 9 with a conical structure. The inner diameter of the end of the second mixing tube 9 far from the fixed tube 8 is smaller than the inner diameter of the end adjacent to the fixed tube 8; Among them, as Figure 5 、 Figures 7 - 9As shown, the vortex tube 15 has a conical structure. Inside the narrower end of the vortex tube 15, several cold flow tubes 14 are fixedly arranged in a vortex structure around its center. The port of the cold flow tube 14 far from the narrower end of the vortex tube 15 is fitted to the inner wall of the vortex tube 15. The ports of several cold flow tubes 14 near the narrower end of the vortex tube 15 extend outside the vortex tube 15 and are respectively connected to the capillary tubes 13. Moreover, the inner diameter of the end of the cold flow tube 14 far from the capillary tube 13 is larger than the inner diameter 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 vortex resistance are balanced to avoid air flow oscillation.

[0025] That is to say, through cold flow concentration in the vortex tube 15, the cooled mixture flows through the cold flow tube 14 and enters the vortex tube 15. The vortex structure of the cold flow tube 14 guides the air flow to spiral along the inner wall of the vortex tube 15, forming a low-temperature vortex, enhancing the concentration of low-temperature gas and the mixing efficiency.

[0026] It can be seen from this that after the high-pressure air flow and dry ice particles that have increased in flow rate and cooled through the capillary tube 13 pass through several cold flow tubes 14 with a vortex structure, and then by virtue of the structure of the vortex tube 15 itself, a vortex will be formed. Because several cold flow tubes 14 have a vortex structure and the injection end is attached to the inner wall of the vortex tube 15, the air flow will spiral forward along the inner wall of the vortex tube 15.

[0027] Furthermore, referring to Figures 10 - 11 As shown, a second mixing chamber 19 is formed in the second mixing tube 9 through several spiral grooves 18. One end of the first mixing chamber 17 is connected to the wider end of the vortex tube 15, and the other end is connected to the second mixing chamber 19. The first mixing chamber 17 has a cylindrical structure, and several spiral grooves 18 that are adapted to the spiral direction of the spiral grooves 18 in the second mixing chamber 19 are evenly opened around its central axis in the first mixing chamber 17. Among them, the vortex direction of the vortex structure formed by the ends of several cold flow tubes 14 located inside the vortex 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 vortex tube 15, and the inner wall of the wider end of the vortex tube 15 is fitted to the inner wall of the first mixing chamber 17.

[0028] That is to say, through the double-stage mixing chambers (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 grooves 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, and the direction of the spiral grooves 18 is the same as the vortex direction of the vortex tube 15, avoiding centrifugal dispersion and maintaining the linear impact kinetic energy.

[0029] 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 through 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 (where the main mixing is concentrated in the vortex tube 15). Since the length of the first mixing chamber 17 is not too long and the forward flow velocity of the air flow and dry ice particles is 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 straight impact to increase their kinetic energy and thus enhancing the cleaning effect. 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 flow velocity of the air flow and dry ice particles is further increased through the conical structure of the second mixing chamber 19.

[0030] 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.

[0031] That is to say, through the terminal kinetic energy focusing of the spray pipe 10, after the mixture is accelerated by passing through the second mixing chamber 19, 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 range.

[0032] 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 air flow temperature (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 cold flow concentration and mixing of 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 mixing of the subsequent 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.

[0033] 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 strengthening 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.

[0034] 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 strengthening → terminal jet focusing, that is, by means of gradually progressive physical effects (throttling expansion, vortex mixing, spiral kinetic energy strengthening), 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 mixture temperature and the decrease in the speed caused by heat exchange during the long-tube transmission process is effectively solved.

[0035] Working principle: 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 clamping 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 an increase in flow rate, 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 advance spirally 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.

[0036] 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 the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A dry ice cleaning device for shoe molds, comprising an installation box (1), wherein a device for driving dry ice particles to be mixed with high-pressure air for spraying is arranged inside the installation box (1), the device is connected to a support pipe (5), and the support pipe (5) extends to the outside of the installation box (1) and is connected to a delivery hose (6) for spraying, characterized in that: One end of the delivery hose (6) away from the support tube (5) is connected to the fixed tube (8), and a plurality of cooling tubes (11) are evenly arranged in a circular split manner around the central axis of the fixed tube (8), one end of the cooling tube (11) is connected to the delivery hose (6), and the other end is connected to the capillary tube (13); One end of the fixed tube (8) is connected to the plurality of capillaries (13), and the other end of the fixed tube (8) is connected to a second mixing tube (9) having a conical structure, wherein the inner diameter of the end of the second mixing tube (9) away from the fixed tube (8) is smaller than the inner diameter of the end adjacent to the fixed tube (8); A plurality of spiral grooves (18) are evenly arranged in the second mixing tube (9) around its central axis.

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

3. The dry ice cleaning device for shoe molds according to claim 1, characterized in that: A mounting clamp (7) is fixedly provided at one end of the delivery hose (6) away from the support tube (5); the delivery hose (6) is connected to the fixed tube (8) via the mounting clamp (7); a mounting plate (12) having an inner diameter matching the inner diameter of the mounting clamp (7) is fixedly connected inside the mounting clamp (7); and a plurality of the cooling tubes (11) are fixedly connected to the mounting plate (12).

4. The dry ice cleaning device for shoe molds according to claim 1, characterized in that: A vortex tube (15) is fixedly arranged in the fixed tube (8), and the vortex tube (15) divides the fixed tube (8) into a cooling chamber (16) and a first mixing chamber (17); The vortex tube (15) is of a conical structure, and the narrower end of the vortex tube (15) is connected to the capillary tube (13), and the wider end of the vortex tube (15) is arranged away from the capillary tube (13) and has an outer diameter that matches the inner diameter of the fixed tube (8).

5. The dry ice cleaning device for shoe molds according to claim 4, characterized in that: A plurality of cold flow tubes (14) are fixedly arranged in a vortex structure around the center of a narrow end of the vortex tube (15), and a port of the cold flow tube (14) away from the narrow end of the vortex tube (15) is in contact with the inner wall of the vortex tube (15); Ports of a plurality of the cold flow tubes (14) adjacent to a narrower end of the vortex tube (15) extend to the outside of the vortex tube (15) and are connected to the capillaries (13) in a one-to-one correspondence.

6. The dry ice cleaning device for shoe molds according to claim 5, characterized in that: A second mixing chamber (19) is formed in the second mixing tube (9) by a plurality of the spiral grooves (18); One end of the first mixing chamber (17) is connected to the wider end of the vortex tube (15), and the other end of the first mixing chamber (17) is connected to the second mixing chamber (19). The first mixing chamber (17) is a cylindrical structure, and a plurality of spiral grooves (18) are evenly arranged around the axis of the first mixing chamber (17). The spiral directions of the spiral grooves (18) in the first mixing chamber (17) and the spiral grooves (18) in the second mixing chamber (19) are adapted to each other.

7. The dry ice cleaning device for shoe molds according to claim 6, characterized in that: An injection pipe (10) is provided at one end of the second mixing pipe (9) away from the fixed pipe (8); one end of the injection pipe (10) is connected to the second mixing chamber (19); the other end of the injection pipe (10) is away from the second mixing pipe (9) and is provided with an injection port in a rectangular structure, wherein the area of ​​the injection port is smaller than the area of ​​the narrower end of the second mixing chamber (19).

8. The dry ice cleaning device for shoe molds according to claim 5, characterized in that: The vortex direction of the vortex structure formed by one end of the plurality of cold flow tubes (14) located inside the vortex tube (15) matches the spiral direction of the spiral groove (18).

9. The dry ice cleaning device for shoe molds according to claim 5, characterized in that: The inner diameter of one end of the cold flow tube (14) away from the capillary tube (13) is greater than the inner diameter of the capillary tube (13).

10. The dry ice cleaning device for shoe molds according to claim 6, 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) fits the inner wall of the first mixing chamber (17).

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