A device for conveying flour

Abstract

This application relates to the field of material conveying technology, and in particular to a device for conveying flour. The device includes a workbench with a main spiral conveying pipe, a secondary spiral conveying pipe, and a weighing device. The main spiral conveying pipe has a larger diameter than the secondary spiral conveying pipe, and both are connected to a guide pipe at their discharge ends. The guide pipe has a closing mechanism, including movable baffles and a hydraulic drive mechanism. The discharge ends of the main and secondary spiral conveying pipes can be flexibly sealed via first and second movable baffles to meet different conveying needs. The lower end of the guide pipe is connected to a cover plate with a pressure relief port via a corrugated flexible pipe. The pressure relief port is covered with a dustproof bag, and the discharge port is equipped with a gate valve. A protective shell forms an annular cavity around the guide pipe. The weighing device is an electronic scale, with a receiving bucket placed below. This device, through the coordinated operation of multiple components, can efficiently and accurately complete flour conveying and weighing, while also providing dustproof and stable conveying functions, improving the reliability and practicality of flour conveying operations.

Description

Technical Field

[0001] This application relates to the field of material conveying technology, and in particular to an apparatus for conveying flour. Background Technology

[0002] In the food processing industry, the preparation of flour places extremely high demands on the ingredients, as this directly affects the quality and consistency of the product's taste. With the continuous development of the food industry, higher standards are being set for the performance of flour conveying devices. How to achieve high-precision flour conveying while ensuring efficiency has become a key issue of ongoing concern within the industry.

[0003] Existing flour conveying devices mostly employ a single spiral conveyor structure. While using large-diameter spiral conveyor pipes results in high conveying efficiency, the error in the weight of flour delivered is significant, making it difficult to meet the demands of precision production. Conversely, using small-diameter spiral conveyor pipes allows for precise delivery of the required flour weight, but the conveying efficiency is low, impacting production schedules. Furthermore, traditional devices lack conveying path switching mechanisms, making it difficult to adapt to diverse production scenarios. Additionally, the lack of effective pressure relief structures in existing devices easily leads to pressure imbalances in the receiving hopper and difficulty in flour falling. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this application provides a flour conveying device that combines efficient conveying with minimal error in the required flour weight.

[0005] This application is achieved through the following technical solution:

[0006] A flour conveying device includes a workbench with a main spiral conveying pipe, a secondary spiral conveying pipe, and a weighing device. The diameter of the main spiral conveying pipe is larger than that of the secondary spiral conveying pipe, and the discharge ends of both the main and secondary spiral conveying pipes are connected to guide pipes. The guide pipes are equipped with a closing mechanism for sealing the discharge ends of either the main or secondary spiral conveying pipes. A cover plate is connected to the lower discharge port of the guide pipes via a flexible pipe, and the cover plate has a pressure relief port. The weighing device is located below the cover plate and has a receiving bucket on it.

[0007] By adopting the above technical solution, the main and auxiliary spiral conveyor pipes have different diameters and are equipped with a closing mechanism. When efficient flour conveying is required, the main spiral conveyor pipe can be used quickly to complete the task. When the main spiral conveyor pipe has conveyed a certain weight of flour, it switches to the auxiliary spiral conveyor pipe for further delivery until the required weight of flour is delivered, reducing flour delivery errors. This satisfies both conveying efficiency and the error in delivering the required flour weight, achieving the needs of refined production. A weighing device and a receiving hopper are installed below the discharge path. After the flour is conveyed and falls into the receiving hopper, the weighing device can accurately weigh the flour in real time, ensuring that the amount of flour conveyed in each batch meets the standard, providing a precise material basis for subsequent production stages. The discharge port at the lower end of the guide pipe is connected to a cover plate via a flexible pipe, which facilitates the movement of the cover plate. The pressure relief port on the cover plate enhances the airflow in the receiving hopper, allowing the flour to fall more easily into the receiving hopper.

[0008] Optionally, the closing mechanism includes a movable baffle and a driving mechanism. The movable baffle is adapted to the discharge end of the main spiral conveying pipe or the auxiliary spiral conveying pipe, and the driving mechanism is used to drive the movable baffle to move to the discharge end of the main spiral conveying pipe or the auxiliary spiral conveying pipe.

[0009] By adopting the above technical solution, the movable baffle is correspondingly set with the discharge ends of the main and auxiliary spiral conveying pipes. The drive mechanism can drive it to move, blocking the discharge end of one of the conveying pipes, ensuring that flour is only output from the selected conveying pipe, thereby reducing delivery errors. In actual production, the movable baffle can be controlled by the drive mechanism to switch between the main and auxiliary spiral conveying pipes according to the flour conveying volume requirements.

[0010] Optionally, the driving mechanism includes a hydraulic telescopic rod, the output end of which is fixedly connected to a movable baffle, and the fixed end of which is fixed to a guide tube.

[0011] By adopting the above technical solution, the hydraulic telescopic rod drives the movable baffle to move, which can stably and effectively control the movable baffle to the discharge end of the main spiral conveying pipe or the auxiliary spiral conveying pipe, thereby flexibly adjusting the flour conveying source and further ensuring small error and high efficiency in flour conveying.

[0012] Optionally, the movable baffle includes a first movable baffle and a second movable baffle. The first movable baffle is adapted to the main spiral conveying pipe, and the second movable baffle is adapted to the discharge end of the auxiliary spiral conveying pipe. The first movable baffle and the second movable baffle are ball-jointed at both ends of the connecting rod. The middle part of the connecting rod is hinged to a fixed rod fixed in the guide pipe, and the output end of the hydraulic telescopic rod is hinged to the connecting rod.

[0013] By adopting the above technical solution, the first movable baffle is adapted to the main spiral conveying pipe, and the second movable baffle is adapted to the auxiliary spiral conveying pipe, which can respectively block the discharge end of the corresponding conveying pipe. According to the flour conveying volume requirements, the connecting rod is driven by the hydraulic telescopic rod to drive the different baffles to move, realizing flexible switching between large-diameter rapid conveying and small-diameter conveying, ensuring that the flour conveying matches the production rhythm. The first and second movable baffles are connected to both ends of the connecting rod by ball joint, and the middle of the connecting rod is hinged to the fixed rod. The hydraulic telescopic rod is hinged to the connecting rod. This structure forms a lever linkage. When the hydraulic telescopic rod extends or retracts, the lever principle is used to rotate the connecting rod, realizing fast and flexible switching of the conveying pipe. The switching process is smooth, requiring no complicated operation, and effectively improving the conveying efficiency. The ball joint connection method allows the movable baffle to adaptively adjust the discharge port of the conveying pipe during the movement process, so as to better achieve the sealing of the discharge port.

[0014] Optionally, the guide tube has a threaded hole on the tube wall near the outlet for fixing the flexible tube, and a fastening bolt is threaded into the threaded hole.

[0015] By adopting the above technical solution, the threaded hole and fastening bolt work together to firmly fix the flexible tube at the outlet of the guide tube, ensuring that the flexible tube will not fall off or loosen due to flour impact or equipment vibration during flour conveying, thus ensuring the integrity of the flour conveying path and maintaining stable operation of the device. Using a threaded connection, installing the flexible tube simply requires screwing the bolt into the threaded hole and tightening it, making the operation simple and convenient. When the flexible tube needs to be replaced due to wear or aging, the bolt can be quickly unscrewed, easily disassembling the flexible tube, significantly shortening equipment maintenance time and improving work efficiency. After tightening the fastening bolt, the flexible tube and the outlet of the guide tube are tightly fitted, effectively preventing flour leakage from the connection point during conveying, avoiding dust flying, ensuring a clean working environment, reducing material waste, and lowering safety hazards caused by flour leakage. The design of the threaded hole and fastening bolt allows for adjustment of the tightening force according to different specifications and wall thicknesses of the flexible tube, providing strong versatility and facilitating the selection of appropriate flexible tubes according to actual production needs, improving the applicability and flexibility of the device.

[0016] Optionally, the wall of the flexible tube has a corrugated structure.

[0017] By adopting the above technical solution, the corrugated structure gives the flexible tube good elastic deformation capability. When flour impacts the flexible tube quickly during the conveying process, the corrugations can absorb the impact force through compression and extension, reduce the vibration transmission to the flour conveying device, effectively reduce the operating noise of the equipment, and at the same time avoid damage caused by rigid impact, thus extending the service life of the equipment.

[0018] Optionally, a slide valve is provided at the outlet of the guide tube.

[0019] By adopting the above technical solution, closing the gate valve before the flour conveying begins can prevent flour from flowing out prematurely and causing waste; closing the valve at the end of the conveying can cut off the flour flow in time, avoid over-conveying, and ensure the accuracy and controllability of the flour conveying volume.

[0020] Optionally, a dustproof bag is fitted over the pressure relief port.

[0021] By adopting the above technical solution, the dustproof bag has a fine mesh structure, which can efficiently intercept and filter flour particles discharged during pressure relief, allowing only air to pass through while trapping flour dust inside the bag. This not only prevents flour dust from drifting into the working environment and reducing dust pollution, but also prevents dust accumulation from causing explosion hazards, thus ensuring a safe production environment.

[0022] Optionally, the weighing device is an electronic scale.

[0023] By adopting the above technical solution, the electronic scale can display the flour weight data in real time. During the flour conveying process, the operator can intuitively and timely understand the amount of flour conveyed; the electronic scale's operating interface is simple and easy to understand.

[0024] Optionally, the main spiral conveying pipe, the auxiliary spiral conveying pipe, and the guide pipe are provided with a protective shell on their outer periphery.

[0025] By adopting the above technical solution, the protective shell can form a heat insulation cavity around the conveying pipeline, and the protective shell can be equipped with an air inlet, on which a fan can be installed to enhance the air circulation in the heat insulation cavity, reduce the temperature of the conveying pipeline, and also reduce the noise generated by the device during the flour conveying process.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The flour conveying device of this application achieves efficient flour conveying and reduces the error in the weight of flour required for delivery, which can meet the needs of refined production.

[0028] 2. This application utilizes a closed mechanism where a movable baffle works in conjunction with the drive mechanism to flexibly seal the discharge ends of the main and auxiliary spiral conveying pipes. By effectively controlling the movement of the baffle, rapid switching between conveying pipes of different diameters can be achieved, meeting the needs of large-volume flour conveying or reducing errors, effectively avoiding flour conveying chaos, and improving the flexibility and accuracy of the conveying system.

[0029] 3. This application uses threaded holes in the guide tube wall and fastening bolts to fix the flexible tube, which can achieve stable installation of the flexible tube and prevent it from falling off due to vibration and pressure during flour conveying. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the flour conveying device described in Embodiment 1;

[0031] Figure 2 This is a schematic diagram of the closing mechanism described in Embodiment 1;

[0032] Figure 3 This is a schematic diagram of the feed hopper described in Embodiment 1;

[0033] Figure 4 This is a schematic diagram of the slide gate valve described in Embodiment 1;

[0034] Figure 5 This is a schematic diagram of the installation structure of the pressure relief port and the dustproof bag as described in Embodiment 1;

[0035] Figure 6 This is a schematic diagram of the installation structure of the guide tube and the flexible tube described in Embodiment 1;

[0036] Figure 7 This is a schematic diagram of the internal structure of the flour conveying device described in Embodiment 2;

[0037] Figure 8 This is a schematic diagram of the closing mechanism described in Embodiment 2;

[0038] Figure 9 This is a schematic diagram of the protective shell described in Embodiment 2.

[0039] In the diagram: 1. Workbench; 2. Main spiral conveyor pipe; 21. Discharge end; 22. Guide pipe; 221. Flexible pipe; 222. Protective shell; 223. Feed hopper; 23. Closing mechanism; 231. Movable baffle; 2311. First movable baffle; 2312. Second movable baffle; 232. Drive mechanism; 2321. Hydraulic telescopic rod; 2322. Output end; 2323. Fixed end; 233. Connecting rod; 234. Fixed rod; 3. Secondary spiral conveyor pipe; 31. Discharge port; 311. Threaded hole; 3111. Fastening bolt; 312. Slide valve; 4. Weighing device; 41. Receiving bucket; 5. Cover plate; 51. Pressure relief port; 511. Dustproof bag. Detailed Implementation

[0040] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Example 1

[0042] Reference Figures 1-3This application discloses a flour conveying device, including a workbench 1, on which a main spiral conveying pipe 2, a secondary spiral conveying pipe 3, and a weighing device 4 are provided; the conveying pipe diameter of the main spiral conveying pipe 2 is larger than that of the secondary spiral conveying pipe 3, and the discharge ends 21 of the main spiral conveying pipe 2 and the secondary spiral conveying pipe 3 are connected to a guide pipe 22; the guide pipe 22 is provided with a closing mechanism 23 for sealing the discharge ends 21 of the main spiral conveying pipe 2 or the secondary spiral conveying pipe 3; a cover plate 5 is connected to the lower discharge port 31 of the guide pipe 22 through a flexible pipe 221, and the cover plate 5 is provided with a pressure relief port 51; the weighing device 4 is located below the cover plate 5, and a receiving bucket 41 is provided on the weighing device 4.

[0043] Specifically, refer to Figure 1 The guide pipe 22 is equipped with a feed hopper 223, which is used to feed flour into the main and auxiliary spiral conveying pipes 3. The centralized feeding design of the feed hopper 223 can conveniently convey flour to the main and auxiliary spiral conveying pipes 3 simultaneously, improving feeding efficiency. The feed hopper 223 can be made of stainless steel, which has the characteristics of corrosion resistance, high strength, and non-adhesion of flour, making it easy to clean and maintain. The main and auxiliary spiral conveying pipes 3 can also be made of stainless steel to ensure hygiene during flour conveying and the durability of the pipes. The weighing device 4 is an electronic scale. Using an electronic scale as the weighing device 4 has the characteristics of high precision, sensitive response, and intuitive display. It can quickly and accurately measure the weight of flour in the receiving hopper 41, providing reliable data support for the precise control of flour conveying volume and facilitating automated production. The electronic scale can be equipped with a data transmission interface to facilitate the real-time transmission of weighing data to the control system for automated control.

[0044] Reference Figure 2 The closing mechanism 23 includes a movable baffle 231 and a drive mechanism 232. The movable baffle 231 corresponds to the discharge end 21 of the main spiral conveying pipe 2 or the auxiliary spiral conveying pipe 3. The drive mechanism 232 drives the movable baffle 231 to move to the discharge end 21 of the main spiral conveying pipe 2 or the auxiliary spiral conveying pipe 3. The drive mechanism 232 includes a hydraulic telescopic rod 2321. The output end 2322 of the hydraulic telescopic rod 2321 is fixedly connected to the movable baffle 231, and the fixed end 2323 of the hydraulic telescopic rod 2321 is fixed to the guide pipe 22. The movable baffle 231 can be made of stainless steel or aluminum alloy, and its surface is polished to reduce flour adhesion while ensuring sufficient strength. A limit block can be set inside the guide pipe 22 to limit the movement stroke of the movable baffle 231, ensuring accurate positioning and avoiding damage caused by excessive movement.

[0045] Reference Figure 4A slide gate valve 312 is installed at the outlet 31 of the guide pipe 22. The valve body of the slide gate valve 312 can be made of stainless steel, which has high strength and can withstand wear and environmental factors during flour conveying, while meeting food hygiene standards. The slide gate valve 312 can be designed for manual or electric operation. The manual slide gate valve 312 is suitable for small conveying devices or applications with low operating frequency, with lower cost and simpler operation; the electric slide gate valve 312 is suitable for highly automated production lines, enabling remote control and automated operation, and improving production efficiency. In addition, a sealing rubber gasket can be installed at the connection between the slide gate valve 312 and the guide pipe 22 to enhance sealing and prevent flour leakage; graduations or markings can also be set on the surface of the slide gate to allow operators to intuitively understand the opening and closing degree of the slide gate, achieving more accurate flow control.

[0046] Reference Figure 5 A dustproof bag 511 is fitted onto the pressure relief port 51. The dustproof bag 511 has a fine mesh structure, which can efficiently intercept and filter flour particles discharged during pressure relief, allowing only air to pass through while trapping flour dust inside the bag. The dustproof bag 511 is made of food-grade polyester fiber, which has good filtration and air permeability, effectively intercepting flour dust, and has good wear resistance, making it suitable for flour conveying environments. Alternatively, polypropylene can be used, which has excellent antistatic properties, preventing dust adsorption, and is relatively inexpensive, offering good economic benefits. The dustproof bag 511 can be tightly fitted onto the pressure relief port 51 using elastic rings or clamps for easy disassembly and replacement; alternatively, threads can be provided on the edge of the pressure relief port 51 for threaded connection to secure the bag and enhance sealing. The bag volume and diameter are rationally designed according to the size of the pressure relief port 51 and the expected pressure release of the device to ensure both pressure relief requirements and effective dust prevention.

[0047] Reference Figure 6The guide tube 22 has a threaded hole 311 on its wall near the outlet 31 for fixing the flexible tube 221. A fastening bolt 3111 is threaded into the threaded hole 311. The wall of the flexible tube 221 has a corrugated structure. The cooperation between the threaded hole 311 and the fastening bolt 3111 can tightly fix the flexible tube 221 at the outlet 31 of the guide tube 22, ensuring that the flexible tube 221 will not fall off or loosen due to flour impact or equipment vibration during flour conveying, ensuring the integrity of the flour conveying path and maintaining stable operation of the device. The guide tube 22 can be made of stainless steel, which has high strength and can adapt to the flour conveying environment. The fastening bolt 3111 can be made of stainless steel or high-strength alloy steel with rust-proof treatment to ensure the reliability and durability of the connection. The flexible tube 221 is made of food-grade rubber or silicone, which meets food hygiene requirements and has good flexibility and wear resistance. At the connection between the flexible tube 221 and the guide tube 22, a sealing gasket, such as a food-grade silicone gasket, can be added to further enhance the sealing of the connection and prevent flour from leaking from the connection.

[0048] The implementation principle of this embodiment is as follows: the main spiral conveying pipe 2 and the auxiliary spiral conveying pipe 3 use the rotation of the spiral blades to propel the flour forward, thus conveying the flour. Since the conveying diameter of the main spiral conveying pipe 2 is larger than that of the auxiliary spiral conveying pipe 3, the main spiral conveying pipe 2 can be used for conveying large volumes of flour, while the auxiliary spiral conveying pipe 3 can be used for conveying relatively small volumes of flour with reduced error, thus meeting different conveying needs. The closing mechanism 23 in the guide pipe 22 can seal the discharge end 21 of either the main spiral conveying pipe 2 or the auxiliary spiral conveying pipe 3 as needed. During the conveying process, the flour may create pressure within the pipe. A cover plate 5 is connected to the discharge port 31 at the lower end of the guide pipe 22 via a flexible pipe 221. The cover plate 5 has a pressure relief port 51, which allows the pressure within the pipe to be released. Simultaneously, the flexible pipe 221 can mitigate the impact of pressure changes to a certain extent. The weighing device 4 is located below the cover plate 5, and the receiving bucket 41 is placed on the weighing device 4. When the flour falls into the receiving bucket 41 through the guide pipe 22 and the flexible pipe 221, the weighing device 4 can measure the weight of the flour in the receiving bucket 41 in real time, thereby accurately measuring the amount of flour conveyed, so as to accurately control the conveying process.

[0049] Example 2

[0050] Reference Figures 7-9The difference between this embodiment and Embodiment 1 is that the movable baffle 231 includes a first movable baffle 2311 and a second movable baffle 2312. The first movable baffle 2311 is adapted to the main spiral conveying pipe 2, and the second movable baffle 2312 is adapted to the discharge end 21 of the auxiliary spiral conveying pipe 3. The first movable baffle 2311 and the second movable baffle 2312 are ball-jointed at both ends of the connecting rod 233. The middle part of the connecting rod 233 is hinged to a fixed rod 234 fixed in the guide pipe 22, and the output end 2322 of the hydraulic telescopic rod 2321 is hinged to the connecting rod 233. The guide pipe 22 is provided with a protective shell 222 on its outer periphery, and the protective shell 222 and the guide pipe 22 form an annular cavity. The protective shell 222 on the outer periphery of the guide pipe 22 to form an annular cavity can effectively prevent flour leakage during the conveying process and avoid dust flying. This not only ensures the cleanliness of the working environment but also reduces flour waste and lowers the safety hazard of dust explosion. The annular cavity can be provided with exhaust holes to connect to dust removal equipment to further purify the exhaust air and reduce dust emissions.

[0051] The implementation principle of this embodiment is as follows: the first movable baffle 2311 and the second movable baffle 2312 are connected by a ball joint and a hinge structure to form a linkage mechanism. The ball joint and hinge parts can use self-lubricating bearings to reduce frictional resistance and ensure smooth operation of the mechanism. The movable baffle 231 is moved by the hydraulic telescopic rod 2321, which can selectively block the discharge end 21 of the main spiral conveying pipe 2 or the auxiliary spiral conveying pipe 3, achieving flexible switching of the flour conveying path. When a large amount of flour needs to be conveyed quickly, the main spiral conveying pipe 2 is opened; when a small amount of conveying error needs to be controlled, the auxiliary spiral conveying pipe 3 is switched to meet different production needs. The protective shell 222 forms a heat insulation cavity around the conveying pipe, which can reduce the temperature of the conveying pipe and also reduce the noise generated by the device during flour conveying.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A device for conveying flour, characterized in that: The system includes a workbench (1), on which a main spiral conveying pipe (2), a secondary spiral conveying pipe (3), and a weighing device (4) are provided. The conveying pipe diameter of the main spiral conveying pipe (2) is larger than that of the secondary spiral conveying pipe (3), and the discharge ends (21) of the main spiral conveying pipe (2) and the secondary spiral conveying pipe (3) are connected to a guide pipe (22). The guide pipe (22) is provided with a closing mechanism (23) for sealing the discharge end (21) of the main spiral conveying pipe (2) or the secondary spiral conveying pipe (3). The lower end discharge port (31) of the guide pipe (22) is connected to a cover plate (5) through a flexible pipe (221), and the cover plate (5) is provided with a pressure relief port (51). The weighing device (4) is located below the cover plate (5), and the weighing device (4) is provided with a receiving bucket (41).

2. The flour conveying device according to claim 1, characterized in that: The closing mechanism (23) includes a movable baffle (231) and a driving mechanism (232). The movable baffle (231) is adapted to the discharge end (21) of the main spiral conveying pipe (2) or the auxiliary spiral conveying pipe (3). The driving mechanism (232) is used to drive the movable baffle (231) to move to the discharge end (21) of the main spiral conveying pipe (2) or the auxiliary spiral conveying pipe (3).

3. The flour conveying device according to claim 2, characterized in that: The drive mechanism (232) includes a hydraulic telescopic rod (2321), the output end (2322) of the hydraulic telescopic rod (2321) is fixedly connected to the movable baffle (231), and the fixed end (2323) of the hydraulic telescopic rod (2321) is fixed on the guide tube (22).

4. The flour conveying device according to claim 3, characterized in that: The movable baffle (231) includes a first movable baffle (2311) and a second movable baffle (2312). The first movable baffle (2311) is adapted to the main spiral conveying pipe (2), and the second movable baffle (2312) is adapted to the discharge end (21) of the auxiliary spiral conveying pipe (3). The first movable baffle (2311) and the second movable baffle (2312) are ball-jointed at both ends of the connecting rod (233). The middle part of the connecting rod (233) is hinged to a fixed rod (234) fixed in the guide pipe (22), and the output end (2322) of the hydraulic telescopic rod (2321) is hinged to the connecting rod (233).

5. The flour conveying device according to claim 1, characterized in that: The guide tube (22) has a threaded hole (311) on the tube wall near the outlet (31) for fixing the flexible tube (221), and a fastening bolt (3111) is threaded into the threaded hole (311).

6. The flour conveying device according to claim 5, characterized in that: The flexible tube (221) has a corrugated wall structure.

7. The flour conveying device according to claim 1, characterized in that: A slide valve (312) is provided at the outlet (31) of the guide tube (22).

8. The flour conveying device according to claim 1, characterized in that: A dustproof cloth bag (511) is fitted over the pressure relief port (51).

9. The flour conveying device according to claim 1, characterized in that: The weighing device (4) is an electronic scale.

10. The flour conveying device according to claim 1, characterized in that: The outer periphery of the main spiral conveying pipe (2), the auxiliary spiral conveying pipe (3) and the guide pipe (22) is provided with a protective shell (222).

Images