A screening device for milk powder production

Abstract

The utility model relates to the field of milk powder production screening, specifically disclose a screening device for milk powder production, including milk powder work cylinder, the milk powder work cylinder inside swing is provided with rotary screening cylinder, between rotary screening cylinder and milk powder work cylinder, at the both sides symmetry of rotary screening cylinder is provided with a pair of drive mechanism, the lower side of rotary screening cylinder is equipped with conical screening hopper, the lower side of conical screening hopper is equipped with sieve out milk powder guide output mechanism and non - sieve out milk powder discharge mechanism, through conical screening hopper solves the problem of rotary drum flat bottom residue, connects conical screening hopper at rotary screening cylinder bottom, replaces rotary drum flat bottom structure, avoids milk powder to remain in cavity bottom corner, through the lateral output of sieve out milk powder guide output mechanism optimization output structure, non - sieve out milk powder is exported from the milk powder work cylinder side portion discharge pipe through screw feeder, and sieve out milk powder is discharged from the bottom discharge port, replaces single bottom outlet design, realizes quick switching, and greatly improves overall production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of milk powder production screening, specifically a screening device for milk powder production. Background Technology

[0002] Screening devices in milk powder production are key equipment in the milk powder processing flow. They are mainly used to separate impurities or clumps from milk powder that do not meet particle size requirements, ensuring that the finished milk powder has uniform particle size and meets quality standards. They are widely used in the milk powder refining process of dairy processing plants. Their screening efficiency, milk powder residue control, material output convenience, and hygiene protection performance directly affect milk powder production efficiency, raw material utilization, and food safety.

[0003] For example, Chinese utility model patent CN 216261827 U discloses a screening device for milk powder production, including a screening box. A discharge sleeve is fixedly connected to the lower end of the screening box. The discharge sleeve has a conical structure. A rotating drum is rotatably connected inside the screening box. A set of sieve holes are evenly opened on the side wall of the rotating drum. A driving mechanism is set between the upper end of the side wall of the screening box and the rotating drum. The rotating drum can be driven to rotate at high speed by the drive shaft of the driving mechanism and the transmission of the active bevel gear and the driven bevel gear. This causes the milk powder semi-finished product in the rotating drum to generate centrifugal force. Finally, the sieve holes can be used to screen out the clumps of milk powder, thereby improving the screening efficiency in the milk powder production process.

[0004] However, the screening device for milk powder production in the aforementioned patent has the following shortcomings: First, the rotating drum has a flat-bottom structure, which makes it easy for milk powder to remain in the corners of the chamber after screening. This not only wastes raw materials but also requires additional manual cleaning, increasing operating costs. Second, the material output switching is cumbersome. The output structure adopts a single bottom outlet design, requiring qualified milk powder and unqualified milk powder to share the same outlet. Downstream receiving equipment also needs to share the same output position, which easily occupies space during installation. Switching between receiving different materials requires repeated disassembly and reinstallation of pipelines, making it impossible to switch quickly and resulting in prolonged production interruption time, affecting overall production efficiency. Third, the hygiene protection and material guiding effect are poor. There is a lack of targeted protective material guiding structure. During the screening process, milk powder can easily come into direct contact with the internal components of the equipment (such as solenoid valves and conveying components). This may not only cause milk powder to accumulate and block during the discharge process due to the lack of a guiding structure but may also mix in contaminants from the outer shell of the components, affecting the stability of equipment operation and posing food safety hazards. Utility Model Content

[0005] The purpose of this invention is to provide a screening device for milk powder production to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screening device for milk powder production, comprising a milk powder working cylinder, a rotating screening cylinder movably disposed inside the milk powder working cylinder, a pair of driving mechanisms symmetrically disposed on both sides of the rotating screening cylinder between the rotating screening cylinder and the milk powder working cylinder, a conical screening hopper disposed below the rotating screening cylinder, and a milk powder discharge mechanism and a non-milk powder discharge mechanism disposed below the conical screening hopper.

[0007] In a preferred embodiment of this invention, the top of the rotating screening cylinder is connected to the milk powder working cylinder via a sleeved rotating bearing, allowing the rotating screening cylinder to rotate relative to the milk powder working cylinder. A conical screening hopper is connected to the bottom of the rotating screening cylinder, and a rotating conveying connector is connected to the bottom of the conical screening hopper. Several support rods are connected between the rotating conveying connector and the milk powder working cylinder.

[0008] As a preferred embodiment of this utility model, the driving mechanism includes a driving motor, which is connected to the outer wall of the milk powder working cylinder via a bolt mounting plate. The output end of the driving motor is connected to a rotating shaft, which extends into the inside of the milk powder working cylinder. One end of the rotating shaft extending into the inside of the milk powder working cylinder is provided with a driving bevel gear, and the top of the rotating screening cylinder is provided with a driven bevel gear ring. The driving bevel gear meshes with the driven bevel gear ring.

[0009] As a preferred embodiment of this utility model, the milk powder screening and feeding mechanism includes a solenoid valve, the input end of which is connected to the bottom end of the rotary feeding connector, a feeding pipe is connected below the solenoid valve, a screw conveyor is connected to the bottom end of the feeding pipe, the screw conveyor extends to the outside of the milk powder working cylinder, and a discharge pipe is connected to the output end of the screw conveyor.

[0010] As a preferred embodiment of this utility model, the non-screened milk powder discharge mechanism includes a protective guide shell, which is disposed inside the milk powder working cylinder and sleeved on the outside of the solenoid valve, the conveying pipe and the screw conveyor. Several support rods are connected between the protective guide shell and the milk powder working cylinder, and the bottom of the milk powder working cylinder is provided with a discharge port.

[0011] As a preferred embodiment of this utility model, the top of the rotating screening cylinder is sealed with a sealing cap, the screw conveyor is provided with a threaded connecting pipe, one end of the threaded connecting pipe extends into the inside of the protective guide shell, the other end of the threaded connecting pipe extends into the outside of the milk powder working cylinder, the solenoid valve is electrically connected to an external controller through the threaded connecting pipe, and a support frame is provided outside the milk powder working cylinder.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: 1. The conical screening bucket solves the problem of residue on the flat bottom of the rotating drum. The conical screening bucket is connected to the bottom of the rotating screening drum to replace the flat bottom structure. The conical design can guide the non-screened milk powder to naturally collect to the bottom, avoiding milk powder residue in the corners of the chamber, reducing raw material waste and equipment cleaning costs. 2. The output structure is optimized by using a side-output sieved milk powder guiding and output mechanism. Non-sieved milk powder is output from the side discharge pipe of the milk powder working cylinder via a screw conveyor, while sieved milk powder is discharged from the bottom discharge port. This replaces the single bottom outlet design, enabling rapid switching and significantly improving overall production efficiency. 3. The protective and guiding functions are improved by adding a protective guide shell. The protective guide shell is placed on the outside of the component. It can isolate the contaminants that may be generated by non-food grade components, prevent the milk powder from being mixed in and ensure food safety. At the same time, the upper conical structure guides the screened milk powder to slide down the outside of the shell, avoiding the accumulation and blockage of milk powder during discharge, improving the smoothness of the guiding, reducing downtime maintenance caused by blockage, and ensuring stable operation of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model; Figure 2 This is a three-dimensional cross-sectional view of the milk powder working cylinder of this utility model; Figure 3 This is a half-section front view of the milk powder working cylinder of this utility model; Figure 4 This is a schematic diagram of the overall half-section three-dimensional structure of this utility model; Figure 5 This is a schematic diagram of the overall half-section front view of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Milk powder working cylinder; 2. Rotary screening cylinder; 3. Support rod 1; 4. Rotary bearing; 5. Conical screening hopper; 6. Rotary conveying joint; 7. Drive mechanism; 8. Driven mechanism; 9. Driven motor; 10. Bolt mounting plate; 11. Rotary shaft; 12. Driven bevel gear; 13. Driven bevel gear ring; 14. Screened milk powder guide and output mechanism; 15. Solenoid valve; 16. Conveying pipe; 17. Screw conveyor; 18. Discharge pipe; 19. Non-screened milk powder discharge mechanism; 20. Protective guide shell; 21. Support rod 2; 32. Discharge port; 43. Sealing cover; 54. Threading pipe; 65. Support frame; 76. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-5 This utility model provides a technical solution: a screening device for milk powder production, including a milk powder working cylinder 1, a rotating screening cylinder 2 movably arranged inside the milk powder working cylinder 1, a pair of drive mechanisms 3 symmetrically arranged on both sides of the rotating screening cylinder 2 between the rotating screening cylinder 2 and the milk powder working cylinder 1, a conical screening bucket 203 is provided below the rotating screening cylinder 2, and a milk powder discharge mechanism 4 and a non-screened milk powder discharge mechanism 5 are provided below the conical screening bucket 203; The top of the rotating screening cylinder 2 is connected to the milk powder working cylinder 1 through a sleeved rotating bearing 202, so that the rotating screening cylinder 2 can rotate relative to the milk powder working cylinder 1. The bottom of the rotating screening cylinder 2 is connected to a conical screening bucket 203. Compared with the flat bottom structure, the conical screening bucket 203 can help to remove milk powder residue. The bottom of the conical screening bucket 203 is connected to a rotating conveying joint 204. Several support rods 201 are connected between the rotating conveying joint 204 and the milk powder working cylinder 1. The drive mechanism 3 includes a drive motor 301, which is connected to the outer wall of the milk powder working cylinder 1 via a bolt mounting plate 302. The output end of the drive motor 301 is connected to a rotating shaft 303, which extends into the milk powder working cylinder 1. One end of the rotating shaft 303 extending into the milk powder working cylinder 1 is provided with a drive bevel gear 304. The top of the rotating screening cylinder 2 is provided with a driven bevel gear ring 305, and the drive bevel gear 304 meshes with the driven bevel gear ring 305. The milk powder feeding and output mechanism 4 includes a solenoid valve 401. The input end of the solenoid valve 401 is connected to the bottom end of the rotary conveyor 204. A conveying pipe 402 is connected below the solenoid valve 401. A screw conveyor 403 is connected to the bottom end of the conveying pipe 402. The screw conveyor 403 extends to the outside of the milk powder working cylinder 1. The output end of the screw conveyor 403 is connected to the discharge pipe 404. The milk powder feeding and output mechanism 4 can output the unscreened milk powder from the side of the milk powder working cylinder 1 through the screw conveyor 403, avoiding both screened and unscreened milk powder from the bottom of the milk powder working cylinder 1. This can significantly save operation time and prevent the downstream processing equipment that receives two types of milk powder from having only one common outlet at the bottom of the milk powder screening equipment. This would not only cause the equipment to occupy space during installation, but also require the removal of the currently connected pipeline and reinstallation to another device when switching receiving materials, making it impossible to achieve rapid switching. The non-screened milk powder discharge mechanism 5 includes a protective guide shell 501, which is located inside the milk powder working cylinder 1. The upper part of the protective guide shell 501 has a conical structure. When screening milk powder, the screened milk powder can be guided by the conical top of the protective guide shell 501 to reduce milk powder residue during the discharge process. The protective guide shell 501 is sleeved on the outside of the solenoid valve 401, the conveying pipe 402 and the screw conveyor 403 to prevent milk powder from directly contacting the components during the screening process and affecting the operation of the equipment. It can also isolate non-food grade components such as the solenoid valve shell from possible contaminants, preventing such contaminants from falling off and mixing into the milk powder. Several support rods 502 are connected between the protective guide shell 501 and the milk powder working cylinder 1. The support rods 502 can provide support for the protective guide shell 501. The bottom of the milk powder working cylinder 1 is provided with a discharge port 503. The top of the rotary screening cylinder 2 is sealed with a sealing cap 6. The screw conveyor 403 is equipped with a wire connecting pipe 7. One end of the wire connecting pipe 7 extends into the inside of the protective guide shell 501, and the other end of the wire connecting pipe 7 extends into the outside of the milk powder working cylinder 1. The solenoid valve 401 is electrically connected to the external controller through the wire connecting pipe 7. The outside of the milk powder working cylinder 1 is equipped with a support frame 8.

[0017] The principle and usage process of this utility model: Open the sealing cover 6 at the top of the rotary screening cylinder 2, pour the milk powder to be screened into the rotary screening cylinder 2 at a uniform speed, and close the sealing cover 6 to prevent dust leakage; start the drive motor 301, the drive motor 301 drives the active bevel gear 304, the active bevel gear 304 drives the driven bevel gear ring 305, when the rotary screening cylinder 2 is driven to rotate by the driven bevel gear ring 305, the screened milk powder that meets the particle size requirements falls into the milk powder working cylinder 1 through the screen holes in the cylinder wall, is guided by the upper conical structure of the protective guide shell 501, slides down the outside of the protective guide shell 501 to the bottom of the milk powder working cylinder 1, and is discharged from the discharge port 503 and enters the downstream screened milk powder receiving equipment.

[0018] Non-screened milk powder that does not meet the particle size requirements remains in the rotary screening cylinder 2 and gradually gathers downwards into the conical screening hopper 203 as it rotates. The operator opens the solenoid valve 401 through the external controller, and the non-screened milk powder enters the screw conveyor 403 through the rotary conveyor joint 204, the solenoid valve 401, and the conveying pipe 402. The screw conveyor 403 then transports the milk powder from the discharge pipe 404 on the side of the milk powder working cylinder 1 to the non-screened milk powder receiving equipment, thus achieving separate output of the two types of milk powder.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening device for milk powder production, characterized in that: The device includes a milk powder working cylinder (1), a rotating screening cylinder (2) is movably arranged inside the milk powder working cylinder (1), a pair of drive mechanisms (3) are symmetrically arranged on both sides of the rotating screening cylinder (2) between the rotating screening cylinder (2) and the milk powder working cylinder (1), a conical screening bucket (203) is provided below the rotating screening cylinder (2), and a milk powder discharge mechanism (4) and a non-sifted milk powder discharge mechanism (5) are provided below the conical screening bucket (203).

2. The screening device for milk powder production according to claim 1, characterized in that: The top of the rotating screening cylinder (2) is connected to the milk powder working cylinder (1) through a sleeved rotating bearing (202), so that the rotating screening cylinder (2) can rotate relative to the milk powder working cylinder (1). The bottom of the rotating screening cylinder (2) is connected to a conical screening bucket (203), and the bottom of the conical screening bucket (203) is connected to a rotating conveying connector (204). Several support rods (201) are connected between the rotating conveying connector (204) and the milk powder working cylinder (1).

3. The screening device for milk powder production according to claim 2, characterized in that: The driving mechanism (3) includes a drive motor (301), which is connected to the outer wall of the milk powder working cylinder (1) by a bolt mounting plate (302). The output end of the drive motor (301) is connected to a rotating shaft (303), which extends into the milk powder working cylinder (1). One end of the rotating shaft (303) extending into the milk powder working cylinder (1) is provided with an active bevel gear (304). The top of the rotating screening cylinder (2) is provided with a driven bevel gear ring (305), and the active bevel gear (304) meshes with the driven bevel gear ring (305).

4. The screening device for milk powder production according to claim 3, characterized in that: The milk powder feeding and output mechanism (4) includes a solenoid valve (401). The input end of the solenoid valve (401) is connected to the bottom end of the rotary feeding joint (204). A feeding pipe (402) is connected below the solenoid valve (401). A screw conveyor (403) is connected to the bottom end of the feeding pipe (402). The screw conveyor (403) extends to the outside of the milk powder working cylinder (1). The output end of the screw conveyor (403) is connected to the discharge pipe (404).

5. A screening device for milk powder production according to claim 4, characterized in that: The non-screened milk powder discharge mechanism (5) includes a protective guide shell (501), which is located inside the milk powder working cylinder (1) and is fitted outside the solenoid valve (401), the conveying pipe (402) and the screw conveyor (403). Several support rods (502) are connected between the protective guide shell (501) and the milk powder working cylinder (1). The bottom of the milk powder working cylinder (1) is provided with a discharge port (503).

6. A screening device for milk powder production according to claim 5, characterized in that: The top of the rotating screening cylinder (2) is sealed with a sealing cap (6). The screw conveyor (403) is provided with a wire connecting pipe (7). One end of the wire connecting pipe (7) extends into the protective guide shell (501), and the other end of the wire connecting pipe (7) extends into the outside of the milk powder working cylinder (1). The solenoid valve (401) is electrically connected to an external controller through the wire connecting pipe (7). The outside of the milk powder working cylinder (1) is provided with a support frame (8).

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