Freeze-drying equipment for milk powder production and processing technology of freeze-drying equipment

Abstract

The invention discloses freeze-drying equipment for milk powder production and a processing technology thereof, and relates to the technical field of milk powder drying. The device comprises a milk tank, the outer wall of the milk tank is connected with a film filter through a pipeline, the top of the right end of the film filter is provided with a U-shaped pipe, the right side of the U-shaped pipe is provided with a liquid nitrogen barrel, the bottom of the liquid nitrogen barrel is provided with a heating assembly, the bottom of the heating assembly is provided with a cooling mechanism, and the cooling mechanism is internally provided with a refining device for refining milk powder. An anti-pollution device for preventing external cold air from polluting milk powder is arranged in the refining device, and an electric sliding rail is fixedly installed on the top of the inner wall of the liquid nitrogen barrel. According to the invention, the trapezoidal block can be driven to horizontally slide to distinguish up-to-standard milk powder from non-up-to-standard milk powder, so that the problem that the quality of the milk powder is difficult to detect in the production and discharging process of the milk powder is avoided, synchronous discharging of the milk powder with difference in quality and deficiency is prevented, the condition that the non-up-to-standard milk powder is mixed with good milk powder is avoided, and the overall quality of a finished product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of milk powder drying, and specifically relates to a freeze-drying device for milk powder production and its processing technology. Background Art

[0002] Milk powder is a reconstituted food made from fresh milk, goat milk, camel milk, mare's milk and other special milks as raw materials. By using freezing or heating methods, most of the water in the milk is removed, and appropriate amounts of vitamins, minerals, etc. are added after drying. With the development of animal husbandry, the cost of milk powder has gradually decreased and it has become popular, becoming one of the important sources for people to obtain nutrition.

[0003] The patent with the patent announcement number CN221059465U discloses a milk powder processing and drying device, including a bottom bearing platform. On the top of the raw material barrel support for milk, a concentrated milk liquid raw material barrel is installed. On one side of the raw material barrel support for milk, a booster pump is provided. At the middle position on the top of the bottom bearing platform, a drying cylinder is fixedly connected. At the bottom of the drying cylinder, a rapid powder dropping and anti-adhesion mechanism is provided. By setting a receiving funnel, a stainless steel tubular shell, a maintenance cover, a servo motor and an eccentric wheel, when in use, the receiving funnel receives the dropped milk powder, the servo motor in the stainless steel tubular shell starts, and the eccentric wheel at the end of the servo motor rotates at a high speed to form vibration. The vibration is transmitted to the receiving funnel through the stainless steel tubular shell, and the vibration accelerates the sliding of the milk powder and reduces the probability of its adhesion, realizing the function of reducing milk powder adhesion through internal vibration, and solving the problem that the device does not have the function of reducing milk powder adhesion through internal vibration.

[0004] However, this device still has deficiencies: Although this device reduces the adhesion of milk powder through vibration, it is difficult to detect the quality of milk powder during the production and discharging process of milk powder, resulting in the synchronous discharging of milk powder with different qualities, and it is easy to reduce the overall quality of the finished product when non-compliant milk powder is mixed with good-quality milk powder, which is likely to cause economic losses. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a freeze-drying device for milk powder production and its processing technology, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A freeze-drying device for milk powder production, including a milk tank, the outer wall of the milk tank is connected to a membrane filter through a pipeline, the top of the right end of the membrane filter is provided with a U-shaped pipe, a liquid nitrogen tank is arranged on the right side of the U-shaped pipe, a heating component is arranged at the bottom of the liquid nitrogen tank, a cooling mechanism is arranged at the bottom of the heating component, a delicate device for refining milk powder is arranged inside the cooling mechanism, and an anti-pollution device for preventing external cold air from contaminating the milk powder is arranged inside the delicate device. A motorized slide rail is fixedly installed at the top inner wall of the liquid nitrogen tank, two vertical rods are symmetrically and slidably installed inside the motorized slide rail, an expanding arc plate is fixedly installed on one side of the two vertical rods close to the center of the liquid nitrogen tank, a rotating ring is fixedly installed at the bottom of the vertical rod, a number of inclined mesh plates are equidistantly and fixedly installed on the inner wall of the rotating ring, one end of the number of inclined mesh plates away from the rotating ring is fixedly installed with a transmission rod, a sliding ring is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the transmission rod, two cross bars are symmetrically and fixedly installed on the outer wall of the sliding ring, and a collecting hopper is fixedly installed at one end of the cross bar away from the sliding ring.

[0007] According to the above technical solution, the top of the liquid nitrogen tank is arranged at the right end of the top of the U-shaped pipe, the liquid nitrogen tank is fixed by an external support component, a discharge mechanism is arranged at the bottom of the cooling mechanism, a sensor is arranged inside the discharge mechanism, a trapezoidal block is arranged inside the discharge mechanism, two conveying platforms are symmetrically arranged below the discharge mechanism, the top of the expanding arc plate is located inside the feeding end of the liquid nitrogen tank, the outer wall of the rotating ring is slidably installed on the inner wall of the liquid nitrogen tank, the bottom end of the transmission rod penetrates through the heating component and the inside of the cooling mechanism, and a reciprocating spiral groove is arranged on the outer wall of the transmission rod. The bottom outer wall of the collecting hopper is in contact with the inner wall of the heating component. The milk tank transports the milk source through a pipeline to the inside of the membrane filter for membrane filtration to remove impurities, and then transports the filtered milk source to the inside of the liquid nitrogen tank through the U-shaped pipe, and is sprayed in the form of a spray inside the liquid nitrogen tank. The liquid nitrogen inside the interlayer of the liquid nitrogen tank realizes low-temperature drying and cooling of the milk source, removes moisture and increases the dry matter content, ensuring the retention of low-temperature heat-sensitive nutrients. Then the milk powder falls into the heating component and the cooling mechanism for subsequent processing; Start the motorized slide rail, the motorized slide rail drives the vertical rod to revolve, and the vertical rod drives the expanding arc plate to revolve inside the feeding end of the liquid nitrogen tank; then the vertical rod drives the rotating ring to revolve along the inner wall of the liquid nitrogen tank, and the rotating ring drives the inclined mesh plates to move synchronously. The inclined mesh plates drive the transmission rod to rotate. At this time, the inclined mesh plates disperse and differentiate the falling milk source by rotating it twice through the mesh holes on its own surface. Then when the transmission rod rotates on its own, due to the restriction of the built-in block of the sliding ring by the reciprocating spiral groove on its own surface, the rotating transmission rod drives the sliding ring to slide downward and reset reciprocally along its own outer wall through the reciprocating spiral groove. The sliding ring drives the cross bar to move synchronously, and the cross bar drives the collecting hopper to slide synchronously along the inner wall of the liquid nitrogen tank. During the movement of the collecting hopper, it continuously scrapes the inner wall of the heating component.

[0008] According to the above technical solution, the delicate device includes a conical block, which is internally penetrated and fixedly installed on the outer wall of the bottom end of the transmission rod. Two elastic telescopic rods are symmetrically and fixedly installed on the outer wall of the conical block. The top of the telescopic end of the elastic telescopic rod is fixedly installed with a sieve barrel. A number of arc-shaped plates are equidistantly and fixedly installed at the bottom of the sieve barrel. A contact block is fixedly installed on the inner wall of the heating component.

[0009] According to the above technical solution, the conical block is located inside the cooling mechanism. The outer wall of the sieve barrel is in contact with the inner wall of the heating component. The top of the contact block is located on the movement trajectory of the bottom arc surface of the arc-shaped plate. When the transmission rod rotates, it drives the conical block to rotate. When the conical block rotates, it drives the elastic telescopic rod to revolve. The elastic telescopic rod drives the sieve barrel to rotate along the inner wall of the heating component. The sieve barrel screens the milk powder contained inside itself through the sieve holes on its own surface and the centrifugal force of rotation. At the same time, the sieve barrel drives the arc-shaped plate to revolve. During the revolution of the arc-shaped plate, it contacts the arc surface of the contact block to generate a contact force. With the help of the contact of the contact block, a force for the arc-shaped plate to move upward is generated. At this time, the arc-shaped plate pushes the sieve barrel upward. The sieve barrel pulls the telescopic end of the elastic telescopic rod to extend synchronously. Then the sieve barrel is reset by the spring force of the elastic telescopic rod. Repeating like this, it enables the sieve barrel to move up and down reciprocally.

[0010] According to the above technical solution, two hollow plates are symmetrically and fixedly installed at the bottom of the conical block. A U-shaped groove is opened at one end of the hollow plate close to the inner wall of the cooling mechanism. A brush plate is fixedly installed at the bottom edge of the hollow plate. The inclined surface of the brush plate is in contact with the inner wall of the cooling mechanism. The conical block drives the hollow plate to revolve inside the cooling mechanism. When the hollow plate revolves, it drives the brush plate to revolve and brush along the inner wall inclined surface of the cooling mechanism close to the discharging mechanism end to ensure the cleanliness inside the cooling mechanism.

[0011] According to the above technical solution, the anti-pollution device includes an I-shaped roller. Both ends of the I-shaped roller are rotatably installed inside the U-shaped groove of the hollow plate. A reciprocating spiral groove is opened on the outer wall of the middle end of the I-shaped roller. A square frame is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the I-shaped roller. Two guide plates are symmetrically and hinged to the outer wall of the top of the hollow plate through torsion springs.

[0012] According to the above technical solution, the outer walls of both ends of the I-shaped roller are in contact with the inner wall of the cooling mechanism. The inner wall of the square frame is slidably connected to the outer wall of the hollow plate. The side of the guide plate close to the hollow plate is located on the movement trajectory of the square frame. The hollow plate drives the I-shaped roller to revolve. When the I-shaped roller contacts the inner wall of the cooling mechanism, it generates frictional force and starts to rotate. When the I-shaped roller rotates, it drives the square frame to slide up and down reciprocally along the outer wall of the hollow plate through the reciprocating spiral groove. When the square frame moves upward, it will contact the guide plate to generate a contact force. At this time, the guide plate starts to turn upward around the hinge axis. Then the guide plate is automatically reset by the torsion spring. Repeating like this.

[0013] According to the above technical solution, a square block is fixedly installed inside the middle end of the square frame. Two activated carbon plates are symmetrically and slidably installed inside the hollow plate through springs. One end of the activated carbon plate close to the center of the hollow plate is in contact with the corner of the square block through an inclined surface, and activated carbon particles are arranged inside the activated carbon plate. A disturbance plate is penetrated and slidably installed inside the activated carbon plate. One end of the disturbance plate away from the activated carbon plate is in contact with the inner wall of the hollow plate. The square frame drives the square block to move up and down. During the movement of the square block, it touches the inclined surface of the activated carbon plate to generate a contact force. The activated carbon plate is pushed by the contact of the square block to slide away from the center of the hollow plate. Then the activated carbon plate is reset by the spring. During the sliding process of the activated carbon plate, the disturbance plate is driven to move synchronously. The disturbance plate is limited by the inner wall of the hollow plate and will disturb the activated carbon particles inside the activated carbon plate.

[0014] A processing technology of a freeze-drying device for milk powder production includes the following steps: S1: The milk tank transports the milk source through a pipeline to the inside of the membrane filter for membrane filtration to remove impurities. Then, the filtered milk source is transported to the inside of the liquid nitrogen tank through a U-shaped pipe and sprayed in the form of a spray inside the liquid nitrogen tank. The liquid nitrogen inside the interlayer of the liquid nitrogen tank realizes low-temperature drying and cooling of the milk source. Then, the milk powder falls into the heating component and the cooling mechanism for subsequent processing; S2: Start the electric slide rail. The electric slide rail drives the vertical rod to revolve. The vertical rod drives the expansion arc plate to revolve inside the feeding end of the liquid nitrogen tank; S3: The vertical rod drives the rotating ring to revolve along the inner wall of the liquid nitrogen tank. The rotating ring drives the inclined mesh plate to move synchronously. The inclined mesh plate drives the transmission rod to rotate. At this time, the inclined mesh plate rotates and disperses and differentiates the falling milk source through the mesh holes on its own surface for the second time; S4: Then, when the transmission rod rotates, through the restriction of the reciprocating spiral groove on its own surface on the clamping block inside the sliding ring, the rotating transmission rod drives the sliding ring to slide downward and reset reciprocally along its own outer wall through the reciprocating spiral groove. The sliding ring drives the cross bar to move synchronously. The cross bar drives the aggregate hopper to slide synchronously along the inner wall of the liquid nitrogen tank.

[0015] The present invention provides a freeze-drying device for milk powder production and its processing technology. It has the following beneficial effects: (1) Through the cooperation of the membrane filter, U-shaped pipe, liquid nitrogen tank, heating component, cooling mechanism, discharging mechanism and trapezoidal block, the present invention can drive the trapezoidal block to slide horizontally to distinguish qualified and unqualified milk powder, avoid the problem that it is difficult to detect the quality of milk powder during the production and discharging process of milk powder, prevent the synchronous discharging of milk powder with different qualities, ensure that the situation of mixing unqualified milk powder and good-quality milk powder does not occur, and improve the overall quality of the finished product; Through the coordination of electric slide rails, vertical rods, expansion arc plates, swivels, inclined mesh plates, transmission rods, sliding rings, cross rods and collecting hoppers, the inner wall of the expansion arc plate is relied on to effectively expand the spray range of the milk source, so that the milk source can be quickly dispersed and dried inside the liquid nitrogen barrel, and the drying and molding speed of the milk powder is improved; at the same time, the inclined mesh plate is relied on to enable the milk source to be quickly molded in a more dispersed posture inside the liquid nitrogen barrel, so that the milk source can fully contact the low temperature inside the liquid nitrogen barrel to retain nutrients, and at the same time, the collecting hopper can realize the rapid collection and falling of the molded milk powder, so as to prevent the milk powder from adhering to the inner wall of the liquid nitrogen barrel, and scrape the inner wall of the heating component to prevent the milk powder from secondary adhesion to the inner wall of the heating component during vacuum drying.

[0016] (2) The present invention sets a fine device, and cooperates with a transmission rod, a conical block, an elastic telescopic rod, a sieve barrel, a curved plate, a resistance block, a hollow plate and a brush plate to enable the sieve barrel to move up and down, so that the milk powder received inside the sieve barrel is distributed more evenly. At the same time, the sieve barrel revolves to sieve the milk powder so that the agglomerated parts generated by the alternation of hot and cold are dispersed in time, thereby improving the overall fineness of the milk powder production process and ensuring that the overall average size of the milk powder is relatively uniform; and the hollow plate and the conical block cooperate to expand the falling range of the milk powder after entering the cooling mechanism, thereby improving the cooling speed of the milk powder inside the cooling mechanism and preventing the residual heat of the milk powder from affecting the subsequent discharge and transportation.

[0017] (3) The present invention adopts the setting of anti-pollution device, and cooperates with hollow plate, I-shaped roller, square frame, guide plate, square block, activated carbon plate and disturbance plate. The guide plate continuously changes the contact posture between the hollow plate and the airflow inside the cooling mechanism during the revolution, thereby accelerating the exchange frequency of the upper and lower airflows inside the cooling mechanism, preventing the top of the cooling mechanism from being radiated by the heat of the heating component to form an upper and lower temperature difference, causing the milk powder before discharge to generate a certain amount of water vapor, thereby reducing the drying efficiency; at the same time, the activated carbon particles are actively volatilized inside the activated carbon plate, and quickly diffused into the cooling mechanism during the revolution, and the external air source drawn into the cooling mechanism is purified by the activated carbon plate, thereby preventing the external air source from eroding and contaminating the finished milk powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 It is a cross-sectional schematic diagram of the present invention as a whole; Figure 3 This is a schematic diagram of the peripheral structure of the liquid nitrogen barrel of the present invention; Figure 4 This is a schematic diagram of the internal structure of the liquid nitrogen barrel of the present invention; Figure 5 This is a schematic cross-sectional view of the internal structure of the liquid nitrogen barrel of the present invention; Figure 6 It is a schematic diagram of the delicate device of the present invention; Figure 7Schematic diagram of the bottom view of the delicate device of the present invention; Figure 8 Schematic diagram of the anti-pollution device of the present invention; Figure 9 Overall enlarged schematic diagram of the anti-pollution device of the present invention.

[0019] In the figure: 1. Milk tank; 2. Membrane filter; 3. U-shaped tube; 4. Liquid nitrogen tank; 5. Heating component; 6. Cooling mechanism; 7. Discharging mechanism; 8. Trapezoidal block; 9. Conveyor table; 10. Electric slide rail; 11. Vertical rod; 12. Expanding arc plate; 13. Rotating ring; 14. Inclined mesh plate; 15. Transmission rod; 16. Sliding ring; 17. Cross bar; 18. Aggregate hopper; 19. Delicate device; 191. Conical block; 192. Elastic telescopic rod; 193. Sieve barrel; 194. Arc panel; 195. Contact block; 196. Hollow plate; 197. Brush plate; 20. Anti-pollution device; 201. I-shaped roller; 202. Square frame; 203. Deflector; 204. Square block; 205. Activated carbon plate; 206. Disturbing plate. Detailed implementation manners

[0020] 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.

[0021] Please refer to Figures 1-9 , one embodiment of the present invention is: A freeze-drying device for milk powder production, including a milk tank 1. The outer wall of the milk tank 1 is connected to a membrane filter 2 through a pipeline. The top of the right end of the membrane filter 2 is provided with a U-shaped tube 3. A liquid nitrogen tank 4 is arranged on the right side of the U-shaped tube 3. A heating component 5 is arranged at the bottom of the liquid nitrogen tank 4. A cooling mechanism 6 is arranged at the bottom of the heating component 5. A delicate device 19 for refining milk powder is arranged inside the cooling mechanism 6. An anti-pollution device 20 for preventing external cold air from polluting the milk powder is arranged inside the delicate device 19. An electric slide rail 10 is fixedly installed at the top of the inner wall of the liquid nitrogen tank 4. Two vertical rods 11 are symmetrically and slidably installed inside the electric slide rail 10. An expanding arc plate 12 is fixedly installed on one side of the two vertical rods 11 close to the center of the liquid nitrogen tank 4. A rotating ring 13 is fixedly installed at the bottom of the vertical rod 11. A plurality of inclined mesh plates 14 are equidistantly and fixedly installed on the inner wall of the rotating ring 13. One end of the plurality of inclined mesh plates 14 away from the rotating ring 13 is fixedly installed with a transmission rod 15. A sliding ring 16 is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the transmission rod 15. Two cross bars 17 are symmetrically and fixedly installed on the outer wall of the sliding ring 16. One end of the cross bar 17 away from the sliding ring 16 is fixedly installed with an aggregate hopper 18.

[0022] The top of the liquid nitrogen tank 4 is set at the right end of the top of the U-shaped tube 3. The liquid nitrogen tank 4 is fixed by an external support assembly. At the bottom of the cooling mechanism 6, there is a discharging mechanism 7. Inside the discharging mechanism 7, there is a sensor. Inside the discharging mechanism 7, there is a trapezoidal block 8. Symmetrically arranged below the discharging mechanism 7 are two conveying platforms 9. The top of the expansion arc plate 12 is located inside the feeding end of the liquid nitrogen tank 4. The outer wall of the rotating ring 13 is slidably installed on the inner wall of the liquid nitrogen tank 4. The bottom end of the transmission rod 15 penetrates through the heating assembly 5 and into the cooling mechanism 6, and a reciprocating spiral groove is formed on the outer wall of the transmission rod 15. The bottom outer wall of the aggregate hopper 18 contacts the inner wall of the heating assembly 5. By detecting the quality of the milk powder through the sensor inside the discharging mechanism 7, the trapezoidal block 8 is driven to slide horizontally to distinguish the qualified and unqualified milk powder, avoiding the problem that it is difficult to detect the quality of the milk powder during the production and discharging process of the milk powder, preventing the synchronous discharging of milk powder with advantages and disadvantages, ensuring that the situation of mixing unqualified milk powder and good-quality milk powder does not occur, and improving the overall quality of the finished product; Through the above cooperation, relying on the inner wall of the expansion arc plate 12, the spraying range of the milk source is effectively expanded, so that the milk source can be quickly dispersed and dried inside the liquid nitrogen tank 4, improving the drying and forming speed of the milk powder; Through the above cooperation, relying on the inclined mesh plate 14, the milk source can be quickly formed in a more dispersed state inside the liquid nitrogen tank 4, enabling the milk source to fully contact the low temperature inside the liquid nitrogen tank 4 to retain nutrients. At the same time, the aggregate hopper 18 realizes the rapid collection and falling of the formed milk powder, preventing the milk powder from adhering to the inner wall of the liquid nitrogen tank 4 and scraping the inner wall of the heating assembly 5, avoiding secondary adhesion between the milk powder and the inner wall of the heating assembly 5 during vacuum drying.

[0023] During use, the milk can 1 transports the milk source to the inside of the membrane filter 2 through a pipeline for membrane filtration to remove impurities, and then transports the filtered milk source to the inside of the liquid nitrogen tank 4 through the U-shaped tube 3. It is sprayed in the form of a spray inside the liquid nitrogen tank 4. The liquid nitrogen inside the sandwich of the liquid nitrogen tank 4 realizes the low-temperature drying and cooling of the milk source, removing moisture and increasing the dry matter content, ensuring the retention of low-temperature heat-sensitive nutrients. Then the milk powder falls into the heating assembly 5 and the cooling mechanism 6 for subsequent processing. By detecting the quality of the milk powder through the sensor inside the discharging mechanism 7, the trapezoidal block 8 is driven to slide horizontally to distinguish the qualified and unqualified milk powder, avoiding the problem that it is difficult to detect the quality of the milk powder during the production and discharging process of the milk powder, preventing the synchronous discharging of milk powder with advantages and disadvantages, ensuring that the situation of mixing unqualified milk powder and good-quality milk powder does not occur, and improving the overall quality of the finished product; Start the electric slide rail 10. The electric slide rail 10 drives the vertical rod 11 to revolve. The vertical rod 11 drives the expanding arc plate 12 to revolve inside the feeding end of the liquid nitrogen tank 4. Through the above cooperation, relying on the inner wall of the expanding arc plate 12, the milk source spraying range is effectively enlarged, so that the milk source can be quickly dispersed and dried inside the liquid nitrogen tank 4, improving the drying and forming speed of the milk powder. Then, the vertical rod 11 drives the rotating ring 13 to revolve along the inner wall of the liquid nitrogen tank 4. The rotating ring 13 drives the inclined mesh plate 14 to move synchronously. The inclined mesh plate 14 drives the transmission rod 15 to rotate. At this time, the inclined mesh plate 14 rotates and disperses the falling milk source for the second time through the mesh holes on its own surface. Then, when the transmission rod 15 rotates, through the restriction of the reciprocating spiral groove on its own surface on the built-in block of the sliding ring 16, the rotating transmission rod 15 drives the sliding ring 16 to slide downward and reset reciprocally along its own outer wall through the reciprocating spiral groove. The sliding ring 16 drives the cross bar 17 to move synchronously. The cross bar 17 drives the collecting hopper 18 to slide synchronously along the inner wall of the liquid nitrogen tank 4. During the movement of the collecting hopper 18, it continuously scrapes the inner wall of the heating component 5. Through the above cooperation, relying on the inclined mesh plate 14, the milk source can be quickly formed in a more dispersed state inside the liquid nitrogen tank 4, so that the milk source can fully contact the low temperature inside the liquid nitrogen tank 4 to retain nutrients. At the same time, the collecting hopper 18 realizes the rapid collection and falling of the formed milk powder, preventing the milk powder from adhering to the inner wall of the liquid nitrogen tank 4, and scraping the inner wall of the heating component 5, preventing the milk powder from adhering to the inner wall of the heating component 5 again during vacuum drying.

[0024] Please refer to Figures 1-9 , on the basis of the above embodiment, in another embodiment of the present invention, a delicate device 19 is further included; The delicate device 19 includes a conical block 191. The conical block 191 penetrates and is fixedly installed on the outer wall of the bottom end of the transmission rod 15. Two elastic telescopic rods 192 are symmetrically and fixedly installed on the outer wall of the conical block 191. The top of the telescopic end of the elastic telescopic rod 192 is fixedly installed with a sieve barrel 193. A number of arc-shaped plates 194 are equidistantly and fixedly installed at the bottom of the sieve barrel 193. A contact block 195 is fixedly installed on the inner wall of the heating component 5.

[0025] The conical block 191 is located inside the cooling mechanism 6. The outer wall of the sieve barrel 193 is in contact with the inner wall of the heating component 5. The top of the contact block 195 is located on the movement track of the bottom arc surface of the arc-shaped plate 194. Through the above cooperation, the sieve barrel 193 is promoted to move up and down, so that the milk powder received inside it is more evenly distributed. At the same time, the sieve barrel 193 revolves and sieves the milk powder to timely disperse the caked part caused by the cold and heat alternation, improving the overall fineness during the milk powder production process and ensuring that the overall average particle size of the milk powder is relatively uniform.

[0026] Two hollow plates 196 are symmetrically and fixedly installed at the bottom of the conical block 191. A U-shaped groove is opened at one end of the hollow plate 196 close to the inner wall of the cooling mechanism 6. A brush plate 197 is fixedly installed at the bottom edge of the hollow plate 196. The inclined surface of the brush plate 197 is in contact with the inner wall of the cooling mechanism 6. Through the above cooperation, the hollow plate 196 and the conical block 191 are promoted to cooperate to expand the falling range of the milk powder after entering the cooling mechanism 6, thereby improving the cooling speed of the milk powder in the cooling mechanism 6 and preventing the residual heat of the milk powder from affecting the subsequent discharge and transportation.

[0027] During use, the transmission rod 15 drives the conical block 191 to rotate when it rotates, and the conical block 191 drives the elastic telescopic rod 192 to revolve when it rotates. The elastic telescopic rod 192 drives the sieve barrel 193 to rotate along the inner wall of the heating component 5, and the sieve barrel 193 sieves the milk powder received inside itself through the sieve holes on its surface and the centrifugal force of rotation. At the same time, the sieve barrel 193 drives the arc panel 194 to revolve, and the arc panel 194 contacts the arc surface of the resistance block 195 during the revolution to generate a resistance force, and the resistance of the resistance block 195 causes the arc panel 194 to generate a force to move upward, at this time, the arc panel 194 pushes the sieve barrel 193 to move upward, and the sieve barrel 193 pulls the telescopic end of the elastic telescopic rod 192 to extend synchronously, and then the sieve barrel 193 is reset by the spring force of the elastic telescopic rod 192, and this is repeated, so that the sieve barrel 193 can reciprocate up and down. The above cooperation causes the sieve barrel 193 to move up and down, so that the milk powder received inside the sieve barrel 193 is distributed more evenly. At the same time, the sieve barrel 193 revolves to sieve the milk powder so that the agglomerated parts caused by the alternation of hot and cold are dispersed in time, thereby improving the overall fineness of the milk powder production process and ensuring that the overall average size of the milk powder is relatively uniform; the conical block 191 drives the hollow plate 196 to revolve inside the cooling mechanism 6, and when the hollow plate 196 revolves, it drives the brush plate 197 to revolve and brush along the inner wall slope of the inner wall of the cooling mechanism 6 close to one end of the discharging mechanism 7, so as to ensure the cleanliness of the inside of the cooling mechanism 6. The above cooperation causes the hollow plate 196 and the conical block 191 to cooperate to expand the falling range of the milk powder after entering the cooling mechanism 6, thereby improving the cooling speed of the milk powder inside the cooling mechanism 6 and preventing the residual heat of the milk powder from affecting the subsequent discharging and transportation.

[0028] See also Figures 1-9 , based on the above embodiment, another embodiment of the present invention further includes an anti-pollution device 20; The anti-pollution device 20 includes an I-shaped roller 201, both ends of which are rotatably installed inside the U-shaped groove of the hollow plate 196. A reciprocating spiral groove is opened on the outer wall of the middle end of the I-shaped roller 201. A square frame 202 is penetrated and movably installed on the outer wall of the reciprocating spiral groove of the I-shaped roller 201. The outer wall of the top end of the hollow plate 196 is symmetrically and hingedly connected to two guide plates 203 through a torsion spring.

[0029] The outer walls at both ends of the I-shaped roller 201 are in contact with the inner wall of the cooling mechanism 6. The inner wall of the square frame 202 is slidably connected to the outer wall of the hollow plate 196. One side of the flow guide plate 203 close to the hollow plate 196 is located on the movement track of the square frame 202. Through the above cooperation, the contact posture between the hollow plate 196 and the internal air flow of the cooling mechanism 6 during the revolution is continuously changed by relying on the flow guide plate 203, the exchange frequency of the upper and lower air flows inside the cooling mechanism 6 is accelerated, and the top of the cooling mechanism 6 is prevented from being radiated by the heat of the heating component 5 to form an upper and lower temperature difference, so that a certain amount of water vapor is generated in the milk powder before discharging, thereby reducing the drying efficiency.

[0030] A square block 204 is fixedly installed inside the middle end of the square frame 202. Two activated carbon plates 205 are symmetrically and slidably installed inside the hollow plate 196 through springs. The inclined surface at one end of the activated carbon plate 205 close to the center of the hollow plate 196 is in contact with the corner of the square block 204, and activated carbon particles are arranged inside the activated carbon plate 205. A disturbance plate 206 is installed inside the activated carbon plate 205 through penetration and sliding. One end of the disturbance plate 206 away from the activated carbon plate 205 is in contact with the inner wall of the hollow plate 196. Through the above cooperation, the activated carbon particles can actively volatilize inside the activated carbon plate 205 and quickly diffuse into the cooling mechanism 6 during the revolution. The activated carbon plate 205 is relied on to purify the external air source drawn into the cooling mechanism 6, and the finished milk powder is prevented from being eroded and polluted by the external air source.

[0031] During use, the hollow plate 196 drives the I-shaped roller 201 to revolve. When the I-shaped roller 201 contacts the inner wall of the cooling mechanism 6, frictional force is generated and the I-shaped roller 201 starts to rotate. When the I-shaped roller 201 rotates, it drives the square frame 202 to slide reciprocally up and down along the outer wall of the hollow plate 196 through the reciprocating spiral groove. During the upward movement of the square frame 202, it will contact the deflector plate 203 to generate a contact force. At this time, the deflector plate 203 starts to turn upward with the hinge axis as the center, and then the deflector plate 203 automatically resets through the torsion spring. This process repeats. Through the above cooperation, relying on the deflector plate 203, the contact posture between the hollow plate 196 and the internal air flow of the cooling mechanism 6 during the revolution is continuously changed, accelerating the exchange frequency of the upper and lower air flows inside the cooling mechanism 6, preventing the top of the cooling mechanism 6 from being radiated by the heat of the heating component 5 to form an upper and lower temperature difference, resulting in a certain amount of water vapor in the milk powder before discharging and thus reducing the drying efficiency; the square frame 202 drives the square block 204 to move up and down. During the movement of the square block 204, it contacts the inclined surface of the activated carbon plate 205 to generate a contact force. The activated carbon plate 205 is urged by the contact of the square block 204 to slide away from the center of the hollow plate 196. Then the activated carbon plate 205 resets through the spring. During the sliding process of the activated carbon plate 205, the disturbance plate 206 moves synchronously. The disturbance plate 206 is limited by the inner wall of the hollow plate 196 and will disturb the activated carbon particles inside the activated carbon plate 205. Through the above cooperation, the activated carbon particles can actively volatilize inside the activated carbon plate 205 and quickly diffuse into the cooling mechanism 6 during the revolution. Relying on the activated carbon plate 205 to purify the external air source drawn into the cooling mechanism 6, avoiding the erosion and pollution of the finished milk powder by the external air source.

[0032] A processing technology for a freeze-drying device for milk powder production includes the following steps: S1: The milk tank 1 transports the milk source through a pipeline to the inside of the membrane filter 2 for membrane filtration to remove impurities, and then transports the filtered milk source to the inside of the liquid nitrogen tank 4 through the U-shaped pipe 3. In the liquid nitrogen tank 4, it is sprayed in a spray form. The liquid nitrogen in the interlayer of the liquid nitrogen tank 4 realizes the low-temperature drying and cooling of the milk source. Then the milk powder falls into the heating component 5 and the cooling mechanism 6 for subsequent processing; S2: Start the electric slide rail 10. The electric slide rail 10 drives the vertical rod 11 to revolve, and the vertical rod 11 drives the expansion arc plate 12 to revolve inside the feeding end of the liquid nitrogen tank 4; S3: The vertical rod 11 drives the rotating ring 13 to revolve along the inner wall of the liquid nitrogen tank 4. The rotating ring 13 drives the inclined mesh plate 14 to move synchronously. The inclined mesh plate 14 drives the transmission rod 15 to rotate. At this time, the inclined mesh plate 14 performs secondary rotation and dispersion of the falling milk source through the mesh holes on its own surface; S4: After that, when the transmission rod 15 rotates on its own axis, through the restriction of the reciprocating spiral groove on its surface on the built-in block of the sliding ring 16, the rotating transmission rod 15 drives the sliding ring 16 to slide reciprocally downward along its outer wall and reset through the reciprocating spiral groove. The sliding ring 16 drives the cross bar 17 to move synchronously, and the cross bar 17 drives the aggregate hopper 18 to slide synchronously along the inner wall of the liquid nitrogen barrel 4.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A freeze-drying device for producing milk powder, comprising a milk tank (1), characterized in that: The outer wall of the milk tank (1) is connected to a membrane filter (2) through a pipeline, a U-shaped tube (3) is arranged at the top of the right end of the membrane filter (2), a liquid nitrogen barrel (4) is arranged on the right side of the U-shaped tube (3), a heating component (5) is arranged at the bottom of the liquid nitrogen barrel (4), a cooling mechanism (6) is arranged at the bottom of the heating component (5), a fine device (19) for refining milk powder is arranged inside the cooling mechanism (6), an anti-pollution device (20) for preventing external cold air from contaminating the milk powder is arranged inside the fine device (19), an electric slide rail (10) is fixedly installed on the top of the inner wall of the liquid nitrogen barrel (4), and the electric slide rail (10) is symmetrically and slidably installed inside. There are two vertical rods (11), and expansion arc plates (12) are fixedly installed on one side of the two vertical rods (11) close to the center of the liquid nitrogen barrel (4). A rotating ring (13) is fixedly installed at the bottom of the vertical rod (11). A plurality of inclined mesh plates (14) are fixedly installed on the inner wall of the rotating ring (13) at equal distances. A transmission rod (15) is fixedly installed on one end of the plurality of inclined mesh plates (14) away from the rotating ring (13). A sliding ring (16) is movably installed on the outer wall of the reciprocating spiral groove of the transmission rod (15). Two cross rods (17) are symmetrically and fixedly installed on the outer wall of the sliding ring (16). A collecting hopper (18) is fixedly installed on the end of the cross rod (17) away from the sliding ring (16).

2. A freeze-drying device for milk powder production according to claim 1, characterized in that: The top of the liquid nitrogen barrel (4) is arranged at the right end of the top of the U-shaped tube (3), the liquid nitrogen barrel (4) is fixed by an external support assembly, a discharging mechanism (7) is arranged at the bottom of the cooling mechanism (6), a sensor is arranged inside the discharging mechanism (7), a trapezoidal block (8) is arranged inside the discharging mechanism (7), two conveying platforms (9) are symmetrically arranged below the discharging mechanism (7), the top of the expansion arc plate (12) is located inside the feeding end of the liquid nitrogen barrel (4), the outer wall of the rotating ring (13) is slidably installed on the inner wall of the liquid nitrogen barrel (4), the bottom end of the transmission rod (15) passes through the heating assembly (5) and the cooling mechanism (6), and the outer wall of the transmission rod (15) is provided with a reciprocating spiral groove, and the outer wall of the bottom end of the collecting hopper (18) contacts the inner wall of the heating assembly (5).

3. A freeze-drying device for milk powder production according to claim 2, characterized in that: The fine-grained device (19) comprises a conical block (191), the interior of the conical block (191) penetrates through and is fixedly mounted on the outer wall of the bottom end of the transmission rod (15), the outer wall of the conical block (191) is symmetrically and fixedly mounted with two elastic telescopic rods (192), a sieve barrel (193) is fixedly mounted on the top of the telescopic end of the elastic telescopic rod (192), a plurality of arc panels (194) are equidistantly and fixedly mounted on the bottom of the sieve barrel (193), and a resistance block (195) is fixedly mounted on the inner wall of the heating component (5).

4. A freeze-drying device for milk powder production according to claim 3, characterized in that: The conical block (191) is located inside the cooling mechanism (6), the outer wall of the screen barrel (193) contacts the inner wall of the heating component (5), and the top of the abutment block (195) is located on the arc surface motion trajectory of the bottom of the arc panel (194).

5. A freeze-drying device for producing milk powder according to claim 4, characterized in that: The conical block (191) has two hollow plates (196) symmetrically and fixedly mounted on the bottom, a U-shaped groove being provided at one end of the hollow plate (196) close to the inner wall of the cooling mechanism (6), a brush plate (197) being fixedly mounted at the bottom edge of the hollow plate (196), the inclined surface of the brush plate (197) being in contact with the inner wall of the cooling mechanism (6).

6. A freeze-drying device for producing milk powder according to claim 5, characterized in that: The anti-pollution device (20) comprises an I-shaped roller (201), both ends of the I-shaped roller (201) are rotatably mounted inside a U-shaped groove of a hollow plate (196), a reciprocating spiral groove is provided on the outer wall of the middle end of the I-shaped roller (201), a square frame (202) is penetrated and movably mounted on the outer wall of the reciprocating spiral groove of the I-shaped roller (201), and two guide plates (203) are symmetrically and hingedly connected to the outer wall of the top end of the hollow plate (196) via a torsion spring.

7. A freeze-drying device for producing milk powder according to claim 6, characterized in that: The outer walls at both ends of the I-shaped roller (201) are in contact with the inner wall of the cooling mechanism (6), the inner wall of the square frame (202) is slidably connected to the outer wall of the hollow plate (196), and the guide plate (203) is located on the movement track of the square frame (202) on a side close to the hollow plate (196).

8. A freeze-drying device for producing milk powder according to claim 7, characterized in that: A square block (204) is fixedly installed inside the middle end of the square frame (202), and two activated carbon plates (205) are symmetrically and slidably installed inside the hollow plate (196) via springs, and the inclined surface of one end of the activated carbon plate (205) close to the center of the hollow plate (196) contacts the corner of the square block (204), and activated carbon particles are arranged inside the activated carbon plate (205), and a disturbance plate (206) is penetrated and slidably installed inside the activated carbon plate (205), and the end of the disturbance plate (206) away from the activated carbon plate (205) contacts the inner wall of the hollow plate (196).

9. A processing technology for freeze-drying equipment for milk powder production, using the freeze-drying equipment for milk powder production according to claim 8, characterized in that: The following steps are involved: S1: The milk tank (1) transports the milk source through a pipeline to the inside of the membrane filter (2) for membrane filtration to remove impurities, and then transports the filtered milk source to the inside of the liquid nitrogen barrel (4) through the U-shaped tube (3), and sprays it out in the liquid nitrogen barrel (4) in the form of a spray. The liquid nitrogen in the interlayer of the liquid nitrogen barrel (4) realizes low-temperature drying and cooling of the milk source, and then the milk powder falls into the heating component (5) and the cooling mechanism (6) for subsequent processing; S2: starting the electric slide rail (10), the electric slide rail (10) drives the vertical rod (11) to revolve, and the vertical rod (11) drives the expansion arc plate (12) to revolve inside the feeding end of the liquid nitrogen barrel (4); S3: The vertical rod (11) drives the rotating ring (13) to revolve along the inner wall of the liquid nitrogen barrel (4), the rotating ring (13) drives the inclined mesh plate (14) to move synchronously, and the inclined mesh plate (14) drives the transmission rod (15) to rotate. At this time, the inclined mesh plate (14) performs secondary rotation to disperse and differentiate the falling milk source through the mesh holes on its surface; S4: Thereafter, when the transmission rod (15) rotates, the reciprocating spiral groove on its surface restricts the built-in block of the sliding ring (16). The rotating transmission rod (15) drives the sliding ring (16) to slide downward along its own outer wall and reset through the reciprocating spiral groove. The sliding ring (16) drives the cross bar (17) to move synchronously. The cross bar (17) drives the collecting hopper (18) to slide synchronously along the inner wall of the liquid nitrogen barrel (4).

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