A silica pneumatic conveying system
By using a silica pneumatic conveying system, a closed conveying system is achieved through a vacuum buffer chamber and a screw conveyor, which solves the problems of low silica conveying efficiency and dust pollution, realizes high-precision, continuous and stable material conveying, and reduces labor intensity and environmental pollution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- COFCO TUNHE TOMATO CO LTD
- Filing Date
- 2025-09-20
- Publication Date
- 2026-07-31
AI Technical Summary
In the tomato powder production process, the low conveying efficiency of silica leads to dust pollution, affects workers' health, increases labor intensity, and lacks metering accuracy, making it difficult to achieve high-precision, continuous and stable mass flow output.
The system employs a silica pneumatic conveying system, including a feeding station, storage tank, and vacuum buffer chamber. It achieves closed conveying through an air extraction assembly and suction pipes, and combines a screw conveyor and weighing sensors for automated control to ensure accurate material measurement.
It achieves efficient conveying without dust, reduces environmental pollution, lowers labor intensity, ensures accurate material metering, and enables continuous and stable mass flow output.
Smart Images
Figure CN224577569U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of silica conveying technology, and in particular to a silica airflow conveying system. Background Technology
[0002] In the production of tomato powder, adding food-grade silica as an anti-caking agent is a key step in ensuring the anti-caking properties of the tomato powder. Currently, silica is typically transported by workers to storage tanks, which then transfer it to the corresponding production equipment. However, silica transportation generates dust, causing significant environmental pollution. Workers inhaling the dust can also experience health problems, making it unsuitable for use. Furthermore, since the feed inlets of the production equipment are not on the same floor, manual feeding requires workers to transport the material to different floors, increasing their workload. In addition, there are issues with insufficient metering accuracy and large fluctuations in the amount added, making it difficult to achieve high-precision, continuous, and stable mass flow output. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of current silica conveying systems, such as low efficiency and the generation of large amounts of dust during feeding, which affects the health of workers. Therefore, a silica pneumatic conveying system is proposed.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A silica pneumatic conveying system includes a feeding station and a storage tank. The storage tank is equipped with a vacuum buffer chamber, which is connected to the feeding station via a connecting pipe. The vacuum buffer chamber is connected to a suction pipe, which is connected to an air extraction component. A screw conveyor is connected to the lower end of the storage tank.
[0005] Materials are fed into the feeding station, and then transported to the vacuum buffer chamber through the air extraction components and suction pipes, and then to the storage tank. This allows for rapid material transport, and the entire feeding process is fully enclosed, with no dust flying during the feeding process, thus improving the conveying efficiency.
[0006] Preferably, the storage tank includes a tank body, a stirring shaft connected to the side wall of the tank body, multiple stirring blades provided on the stirring shaft, a first motor connected to the lower end of the tank body, the first motor connected to the stirring shaft, the discharge port of the tank body connected to the inlet of the screw conveyor, and multiple air replenishment filter elements connected to the top of the tank body.
[0007] The mixing shaft and mixing blades allow for rapid mixing of the lower part of the tank, preventing material blockage. Meanwhile, the storage tank transports the material to the corresponding production equipment via a screw conveyor.
[0008] Preferably, vibrators are installed at the bottom of the tank and on the screw conveyor.
[0009] Preferably, it also includes a support frame with two load cells mounted on it, and an angle steel plate on the tank body with the lower surface of the angle steel plate abutting against the load cells.
[0010] The weighing sensor can display and record the different weights of the tank each time, record the amount of material conveyed each time, and measure the material conveyed each time.
[0011] Preferably, the vacuum buffer chamber includes a chamber body, the outlet of the chamber body is correspondingly set to the inlet of the tank body, a third filter element is connected to the top of the chamber body, an air suction pipe is connected to the top of the chamber body, a rotary cylinder is connected to the bottom of the chamber body, a discharge plate is hinged to the outlet of the chamber body, the rotary cylinder is connected to the discharge plate, and a feed pipe is connected to the middle of the chamber body, the feed pipe is connected to the end of the connecting pipe.
[0012] The vacuum buffer chamber is connected to the air extraction component, which extracts air from the chamber to create negative pressure, allowing the gas in the feeding station to be transported into the chamber, and then the material to be transported into the tank.
[0013] Preferably, a reversing valve and a second pulse valve are respectively connected to the outer wall of the chamber, the outlet of the air intake pipe is connected to the reversing valve, and the second air bag is connected to the second pulse valve.
[0014] Preferably, a dust removal fan is connected to the top of the feeding station, and the feeding station and the dust removal fan are set accordingly. A first pulse valve is connected to the feeding station, and a first air manifold is connected to the first pulse valve. A discharge pipe is connected to the lower end of the feeding station, and the end of the connecting pipe is connected to the discharge pipe. A straight discharge screen is connected to the middle of the feeding station, and a vibration motor is connected to the lower part of the feeding station.
[0015] The direct discharge screen first screens the input material and then discharges it through the discharge pipe. At the same time, the vibrating motor vibrates the area below the feeding station to prevent material blockage. Preferably, the air extraction assembly includes a fan, the outlet of which is connected to a filter assembly, which is connected to an air intake pipe.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up a feeding station, storage tank and vacuum buffer chamber, silica is conveyed, realizing automated feeding. The feeding process is completely sealed, with no dust flying during the feeding process, no environmental pollution, and no damage to the material form. In addition, the vacuum buffer chamber adsorbs silica, with strong conveying capacity, feeding 10-20kg per minute, reducing the intensity of manual labor. At the same time, the filter element and pulse valve are set to ensure the separation effect of powder and air, and it is not easy to clog. Attached Figure Description
[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.
[0019] Figure 2 This is a schematic diagram of the structure inside the feeding station in a specific embodiment of this utility model.
[0020] Figure 3 This is a schematic diagram of the connection between the storage tank and the vacuum buffer chamber in a specific embodiment of this utility model.
[0021] Figure 4 This is a schematic diagram of the structure of the vacuum buffer chamber in a specific embodiment of this utility model.
[0022] Figure 5 This is a schematic diagram of the material feeding plate on the vacuum buffer chamber in a specific embodiment of this utility model.
[0023] In the diagram: 1. Feeding station; 2. Connecting pipe; 3. Storage tank; 4. Vacuum buffer chamber; 11. Dust removal fan; 12. First pulse valve; 13. First air tank; 14. Vibration motor; 15. Gas spring; 16. First filter element; 17. Second filter element; 18. Discharge pipe; 31. Tank body; 32. Feed pipe; 33. Conveying pipe; 34. Weighing sensor; 35. Screw conveyor; 36. Agitator shaft; 37. Vibrator; 38. Air replenishment filter element; 41. Bin body; 42. Suction pipe; 43. Fan; 44. Third filter element; 45. Rotary cylinder; 46. Filter assembly; 47. Air exchange bag; 48. Discharge plate; 401. Reversing valve; 402. Second pulse valve; 403. Second air tank. Detailed Implementation
[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0025] Reference Figures 1-5A silica pneumatic conveying system includes a feeding station 1 and a storage tank 3. A vacuum buffer chamber 4 is installed on the storage tank 3. The vacuum buffer chamber 4 and the feeding station 1 are connected by a connecting pipe 2. Multiple storage tanks 3 and vacuum buffer chambers 4 can be installed according to site requirements. Each feeding station 1 is connected to a corresponding PLC control box on each vacuum buffer chamber 4. The control box should display the start / stop and status of each device, feed metering data signals back to a touch screen, and have a network interface to facilitate data interaction between the controller or HMI and the DCS system. The field control box is equipped with an emergency stop button and can be adjusted as needed. Different storage tanks 3 with varying capacities are set up to meet different needs. Corresponding valves are installed on the connecting pipe 2 to control the conveying of each storage tank 3. A suction pipe 42 is connected to the vacuum buffer chamber 4, and an air extraction assembly is connected to the suction pipe 42. A screw conveyor 35 is connected to the lower end of the storage tank 3. Vibrators 37 are installed on both the lower part of the tank body 31 and the screw conveyor 35. Multiple vibrators 37 can be installed on the lower part of the tank body 31 as needed to prevent material accumulation inside. Workers first place materials in the feeding station 1. When conveying to different locations is required, the corresponding valves on the connecting pipe 2 are opened. The vacuum buffer chamber 4 generates negative pressure, and the material in the feeding station 1 is transported to the corresponding vacuum buffer chamber 4. The vacuum buffer chamber 4 then transports the material to the storage tank 3, and then the screw conveyor 35 transports the material to the corresponding production equipment. Based on the hourly production volume, the screw conveyor 35 is set to a fixed frequency for quantitative addition, ensuring continuous online addition of silica. After the material tank is fed, the entire system operates normally with weighing. The screw conveyor 35 is connected to a second motor and a worm gear reducer, and also includes a support frame with two weighing sensors 34. The tank body 31 is equipped with… An angle steel is provided, and the lower surface of the angle steel abuts against the weighing sensor 34. The weighing sensor 34 can detect the weight of the material in the storage tank 3. The weighing sensor 34 is installed on the bracket of the tank body 31. The weighing sensor 34 can record the output of the screw conveyor 35, and the record can be viewed on the control cabinet of each device. It converts the weight of the material into an electrical signal, receives the sensor signal, and the material enters the tank 31. The weighing sensor 34 monitors the weight change in real time and transmits the signal to the control system to calculate and display the weight of the material. The material is temporarily stored in the silo, and the weighing system continuously monitors the weight to record the storage amount.
[0026] Reference Figure 3The storage tank 3 includes a tank body 31. A stirring shaft 36 is connected to the side wall of the tank body 31. Multiple stirring blades are provided on the stirring shaft 36. A first motor is connected to the lower end of the tank body 31. The first motor is connected to the stirring shaft 36. The first motor and the stirring shaft 36 are connected through a worm gear reducer. The discharge port of the tank body 31 is connected to the inlet of the screw conveyor 35. Multiple air replenishment filter elements 38 are connected to the top of the tank body 31. A conveying pipe 33 is connected to the bottom of the discharge port of the screw conveyor 35. The conveying pipe 33 is connected to the production equipment to convey materials.
[0027] Reference Figures 3-5 The vacuum buffer chamber 4 includes a chamber body 41, the outlet of which corresponds to the inlet of the tank body 31. A ventilation bag 47 is installed on the chamber body 41. A third filter element 44 is connected to the top of the chamber body 41. An air suction pipe 42 is connected to the top of the chamber body 41. When negative pressure is needed to adsorb materials, the air suction pipe 42 draws air from the chamber body 41. At this time, some material accumulates on the third filter element 44. Then, the second pulse valve 402 backflushes, blowing away the material on the third filter element 44. A rotary cylinder 45 is connected to the bottom of the chamber body 41 and is connected to the outer wall of the chamber body 41. A discharge plate 48 is hinged to the outlet of the chamber body 41. The rotary cylinder 45 is connected to the discharge plate 48, and the rotary cylinder 45 controls the discharge plate 48 to rotate. At this time, the discharge plate 48 opens, and some material is discharged through the chamber body 41. An inlet pipe 32 is connected to the middle of the chamber body 41. The end of the material pipe 32 is connected to the end of the connecting pipe 2. A reversing valve 401 and a second pulse valve 402 are respectively connected to the outer wall of the silo 41. The outlet of the suction pipe 42 is connected to the reversing valve 401. The second air bag 403 is connected to the second pulse valve 402 to realize automated feeding, real-time monitoring, automatic data recording and storage, remote operation, fault diagnosis and early warning, automatic quantitative addition, improve the intelligence level of the control system, reduce manual labor intensity, eliminate dust generated during feeding, and improve the working environment. At the same time, a sensor is installed in the silo 41 to detect the material level in the silo 41. When the material level is lower than the detection point, the sensor sends a feeding request to the controller. The controller controls the opening of the corresponding solenoid valve, and the vacuum buffer silo 4 starts feeding. After feeding for a certain period of time, the solenoid valve is closed to stop feeding; the discharge door is opened to discharge into the storage tank 3, and the filter is backflushed to clean it. At this time, the sensor detects that the material cancels the feeding request, and the controller controls the feeder to enter the waiting state until it receives a feeding request signal from the material level sensor.
[0028] Reference Figure 2A dust collector fan 11 is connected to the top of the feeding station 1. The feeding station 1 and the dust collector fan 11 are set up correspondingly. A first pulse valve 12 is connected to the feeding station 1, and a first air tank 13 is connected to the first pulse valve 12. Before operation, the material is placed on the feeding station 1. The side wall of the feeding station 1 is hinged with a cover, which is connected to a gas spring 15. When the material is conveyed into the feeding station 1, the dust collector fan 11 is turned on, forming a negative pressure. Some of the dust is blocked and filtered by the second filter element 17, effectively controlling the spread of dust. When the feeding is finished, the gas spring 15 closes the cover. The system is sealed to prevent contamination of the workshop. After a period of time, the first pulse valve 12 and the first air tank 13 backflush, blowing the material on the second filter element 17 back onto the material, causing it to fall into the feeding station 1. The lower end of the feeding station 1 is connected to the discharge pipe 18, and the end of the connecting pipe 2 is connected to the discharge pipe 18. The other end of the discharge pipe 18 is connected to the first filter element 16. A straight discharge screen is connected in the middle of the feeding station 1, and a vibration motor 14 is connected to the lower part of the feeding station 1. When adding material, it is only necessary to feed the material into the feeding station 1, reducing the labor intensity of the workers.
[0029] Reference Figure 4 The air extraction assembly includes a blower 43, and the outlet of the blower 43 is connected to a filter assembly 46. The filter assembly 46 is connected to the air extraction pipe 42. The use of the blower 43 is set according to the volume of the storage tank 3 and the vacuum buffer chamber 4 and the distance from the feeding station 1. Vortex blowers and Roots blowers can be used for air extraction.
[0030] In operation, materials are fed into the feeding station 1 and screened for impurities. Simultaneously, the blower 43 on the vacuum buffer chamber 4 starts working, creating a negative pressure inside the chamber. Material is then drawn in through the connecting pipe 2 into the chamber 41 within the vacuum buffer chamber 4, where gas and material are separated. Once the material in the chamber 41 is exhausted, the discharge plate 48 is continuously opened and closed by the rotary cylinder 45. The material is then transported through the chamber 41 to the storage tank 31. A screw conveyor 35 is installed below the storage tank 3, conveying the material from the storage tank 3 to the screw conveyor 35, which then transports the material to the processing equipment.
[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A silica pneumatic conveying system, characterized in that: It includes a feeding station (1) and a storage tank (3). A vacuum buffer chamber (4) is provided on the storage tank (3). The vacuum buffer chamber (4) and the feeding station (1) are connected by a connecting pipe (2). A suction pipe (42) is connected to the vacuum buffer chamber (4). An air extraction component is connected to the suction pipe (42). A screw conveyor (35) is connected to the lower end of the storage tank (3).
2. The silica pneumatic conveying system according to claim 1, characterized in that: The storage tank (3) includes a tank body (31), a stirring shaft (36) is connected to the side wall inside the tank body (31), a plurality of stirring blades are provided on the stirring shaft (36), a first motor is connected to the lower end of the tank body (31), the first motor is connected to the stirring shaft (36), the discharge port of the tank body (31) is connected to the inlet of the screw conveyor (35), and a plurality of air replenishment filter elements (38) are connected to the top of the tank body (31).
3. The silica pneumatic conveying system according to claim 2, characterized in that: Vibrators (37) are installed on the lower part of the tank (31) and on the screw conveyor (35).
4. The silica pneumatic conveying system according to claim 2, characterized in that: It also includes a support frame with two load cells (34) mounted on it, and an angle steel is mounted on the tank body (31), with the lower surface of the angle steel abutting against the load cells (34).
5. The silica pneumatic conveying system according to claim 2, characterized in that: The vacuum buffer chamber (4) includes a chamber body (41), the outlet of the chamber body (41) is correspondingly set to the inlet of the tank body (31), a third filter element (44) is connected to the top of the chamber body (41), an air suction pipe (42) is connected to the top of the chamber body (41), a rotary cylinder (45) is connected to the bottom of the chamber body (41), a discharge plate (48) is hinged to the outlet of the chamber body (41), the rotary cylinder (45) is connected to the discharge plate (48), an inlet pipe (32) is connected to the middle of the chamber body (41), and the end of the inlet pipe (32) is connected to the connecting pipe (2).
6. The silica pneumatic conveying system according to claim 5, characterized in that: A reversing valve (401) and a second pulse valve (402) are respectively connected to the outer wall of the chamber (41). The outlet of the air intake pipe (42) is connected to the reversing valve (401), and the second air bag (403) is connected to the second pulse valve (402).
7. The silica pneumatic conveying system according to claim 1, characterized in that: A dust removal fan (11) is connected to the top of the feeding station (1). The feeding station (1) and the dust removal fan (11) are set up in correspondence. A first pulse valve (12) is connected to the feeding station (1). A first air bag (13) is connected to the first pulse valve (12). A discharge pipe (18) is connected to the lower end of the feeding station (1). The end of the connecting pipe (2) is connected to the discharge pipe (18). A straight discharge screen is connected to the middle part of the feeding station (1). A vibration motor (14) is connected to the lower part of the feeding station (1).
8. The silica pneumatic conveying system according to claim 1, characterized in that: The air extraction assembly includes a fan (43), the outlet of which is connected to a filter assembly (46), which is connected to an air intake pipe (42).