Crushing and screening device for food-grade disodium dihydrogen pyrophosphate
By installing a combination of a sealing cover and a bellows at the crusher feed port, the problem of dust overflow from the crusher is solved, ensuring a clean production environment and stable operation of the equipment.
Patent Information
- Application Number
- CN202422590597.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The dust generated during the operation of the crusher can easily overflow from the cavity between the discharge pipe and the crusher outlet, affecting the production environment and workers' health.
A discharge pipe is installed at the end of the lower hopper of the bucket elevator, and a sealing cover is set between the discharge pipe and the crusher feed port. A bellows is installed in the middle of the sealing cover to achieve sealing and prevent dust from spreading.
It effectively seals the crusher input end to prevent dust from overflowing, thus improving the working environment and equipment operation condition.
Smart Images
Figure CN223417419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crushing and screening devices, in particular to a crushing and screening device for food-grade disodium dihydrogen pyrophosphate. Background Art
[0002] At present, the crushing and screening device of disodium dihydrogen pyrophosphate usually includes the following steps: 1. Preliminary screening: The coarse disodium dihydrogen pyrophosphate particles are preliminarily screened through a screen to separate particles of different sizes. 2. Gradual crushing: The particles of different sizes after preliminary screening are sent to different crushing equipment for graded crushing to ensure that the particles in each particle size range can reach the required fineness. 3. Re-screening: The particles after graded crushing are screened again through a screen to ensure that all particles meet the required particle size standards. 4. Finished product collection: The particles that finally meet the particle size standards are collected and processed or packaged as qualified products.
[0003] During the screening and crushing process of powdered materials, the elevator's discharge pipe is connected to the crusher's inlet to ensure smooth material flow into the crusher for processing. However, the crusher continuously vibrates during operation, generating significant dust. Despite installing a dust extraction duct on the elevator's inlet, it was unable to fully absorb the generated dust. This problem not only impacted the production environment but also adversely affected worker health and the normal operation of the equipment. Summary of the Invention
[0004] The technical problem to be solved by the utility model is that the cavity between the feeding pipe and the crusher outlet easily causes the dust in the crusher to overflow.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a crushing and screening device for food-grade disodium dihydrogen pyrophosphate, including a mounting pipe connected to the output end of the lower hopper at the top of the bucket elevator, the bottom end of the mounting pipe is connected to a discharge pipe, the bottom end of the discharge pipe is located in the feed channel of the crusher, a sealing cover is arranged between the discharge pipe and the feed port of the crusher, and a buffer structure is arranged in the middle of the sealing cover.
[0006] Preferably, the sealing cover includes a bellows and a fixed cover connected to one end of the bellows, the other end of the bellows is connected to the feed port of the crusher, and the movable end of the fixed cover is fixedly connected to the middle of the discharge pipe through a flange plate.
[0007] Preferably, both ends of the corrugated pipe are provided with PVC flanges, and the fixed cover and the crusher are connected through the PVC flanges, and the feed port of the crusher is fixedly provided with a PVC flange.
[0008] Preferably, the discharge pipe is a round tube, the top of the discharge pipe is provided with a reducing end, the reducing section is a rectangular connecting pipe, the bottom end of the mounting pipe is fixedly connected to the top of the connecting pipe through a flange structure, and reinforcing ribs are provided between the mounting pipe and the connecting pipe and the flange structure.
[0009] Preferably, a spiral metal reinforcement layer is embedded inside the outer wall of the corrugated tube.
[0010] The utility model provides a crushing and screening device for food-grade disodium dihydrogen pyrophosphate. A discharge pipe is installed at the end of the lower hopper of a bucket elevator. A sealing cover is installed on the discharge pipe, which is connected to the input end of a crusher through the sealing cover. A bellows is installed in the sealing cover. This ensures that the material is fully transported and the input end of the crusher is sealed, ensuring that dust generated in the crusher cannot overflow from the top input end, thereby avoiding the spread of dust. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0012] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.
[0013] Figure 2 It is a schematic structural diagram of the discharge circular tube in the embodiment of the present utility model.
[0014] In the figure: 1. Bucket elevator; 2. Lower hopper; 3. Mounting pipe; 4. Connecting pipe; 5. Discharge pipe; 6. Fixed cover; 7. Bellows; 8. Crusher; 9. Flange plate. DETAILED DESCRIPTION
[0015] like Figure 1 and Figure 2 As shown, the utility model discloses a crushing and screening device for food-grade disodium dihydrogen pyrophosphate, including a mounting pipe 3 connected to the output end of the lower hopper 2 at the top of the bucket elevator 1, the bottom end of the mounting pipe 3 is connected to the discharge pipe 5, the bottom end of the discharge pipe 5 is located in the feed channel of the crusher 8, a sealing cover is provided between the discharge pipe 5 and the feed port of the crusher 8, and a buffer structure is provided in the middle of the sealing cover.
[0016] Food-grade disodium dihydrogen pyrophosphate powder is transported to the bucket elevator 1 through the feeding pipe. After the bucket elevator 1 lifts the material to the top, the powder is discharged from the lower hopper 2 and enters the installation pipe 3. Then, the powder enters the crusher 8 through the discharge pipe 5. The cam in the crusher 8 is driven by the motor to rotate, and the powder is squeezed and crushed. After the powder is crushed, it enters the screening device for screening. After screening, the large-particle powder is transported to the bucket elevator 1 for re-lifting and crushing to ensure the quality of the discharge.
[0017] During the discharge of the powder from the discharge pipe 5, the sealing cover cooperates with the discharge pipe 5 to seal the input end of the crusher 8, so that the dust generated during the crushing of the powder cannot overflow from the input end of the crusher 8, ensuring the environmental friendliness of the working environment.
[0018] like Figure 1 and Figure 2 As shown. The sealing cover includes a bellows 7 and a fixed cover 6 connected to one end of the bellows 7. The other end of the bellows 7 is connected to the feed port of the crusher 8. The movable end of the fixed cover 6 is fixedly connected to the middle of the discharge pipe 5 via a flange plate 9. The outer diameter of the bellows 7 is larger than that of the discharge pipe 5. The flange plate 9 is coaxially fixedly mounted in the middle of the discharge pipe 5. The fixed cover 6 is then attached to the discharge pipe 5 using bolts on the flange plate 9. The fixed cover 6 is then connected to the bellows 7 to complete the installation of one end of the bellows 7. The other end of the bellows 7 is then installed on the output end of the crusher 8 to seal the crusher 8 input end.
[0019] like Figure 1 and Figure 2 As shown. PVC flanges are installed at both ends of the bellows 7, connecting the fixed cover 6 and the crusher 8 via the PVC flanges. A PVC flange is also fixed to the feed port of the crusher 8. Using PVC flanges for the installation of the bellows 7 reduces its weight and the load-bearing capacity of the discharge pipe 5.
[0020] like Figure 1 As shown, the discharge pipe 5 is a circular tube with a reducing end at its top. The reducing section is a rectangular connecting pipe 4. The bottom end of the mounting pipe 3 is fixedly connected to the top of the connecting pipe 4 via a flange structure. Reinforcing ribs are provided between the mounting pipe 3, the connecting pipe 4, and the flange structure. The connecting pipe 4, with its reducing structure, provides a stable connection with the bottom end of the mounting pipe 3. The reinforcing ribs ensure the strength of the connection structure, thereby improving the stability of the discharge pipe 5.
[0021] As a preferred embodiment of the present invention, a spiral metal reinforcement layer is embedded inside the outer wall of the bellows 7. By adding the metal reinforcement layer inside the bellows 7, the bellows 7 is ensured to have sufficient structural strength, thereby preventing the bellows 7 from deforming during the powder transportation process and causing powder accumulation.
Claims
1. A crushing and screening device for food-grade disodium dihydrogen pyrophosphate, characterized by: The invention comprises a mounting pipe (3) connected to the output end of the lower hopper (2) at the top of the bucket elevator (1), the bottom end of the mounting pipe (3) is connected to a discharge pipe (5), the bottom end of the discharge pipe (5) is located in the feed channel of the crusher (8), a sealing cover is provided between the discharge pipe (5) and the feed port of the crusher (8), and a buffer structure is provided in the middle of the sealing cover.
2. A crushing and screening device for food-grade disodium dihydrogen pyrophosphate as claimed in claim 1, characterized in that: The sealing cover comprises a bellows (7) and a fixed cover (6) connected to one end of the bellows (7), the other end of the bellows (7) is connected to the feed port of the crusher (8), and the movable end of the fixed cover (6) is fixedly connected to the middle of the discharge pipe (5) through a flange plate (9).
3. A crushing and screening device for food-grade disodium dihydrogen pyrophosphate as claimed in claim 2, characterized in that: Both ends of the corrugated pipe (7) are provided with PVC flanges, and the fixed cover (6) and the crusher (8) are connected via the PVC flanges. The feed port of the crusher (8) is fixedly provided with a PVC flange.
4. A crushing and screening device for food-grade disodium dihydrogen pyrophosphate as claimed in claim 2, characterized in that: The discharge pipe (5) is a circular pipe, the top end of the discharge pipe (5) is provided with a reducing end, the reducing section is a rectangular connecting pipe (4), the bottom end of the mounting pipe (3) is fixedly connected to the top end of the connecting pipe (4) through a flange structure, and reinforcing ribs are provided between the mounting pipe (3), the connecting pipe (4) and the flange structure.
5. A crushing and screening device for food-grade disodium dihydrogen pyrophosphate as claimed in claim 2, characterized in that: A spiral metal reinforcement layer is embedded inside the outer wall of the bellows (7).