Closed negative pressure conveying device for flour

Abstract

The utility model relates to the technical field of conveying devices, in particular to a closed type negative pressure conveying device for flour. The closed type negative pressure conveying device comprises a vertically-arranged frame body, a feeding bin used for receiving and temporarily storing flour to be conveyed is arranged at the top of the frame body, and a discharging bin connected with downstream production equipment or a storage container and used for outputting the flour is arranged at the bottom of the frame body. A charging barrel used for forming a closed conveying channel is connected between the feeding bin and the discharging bin, a discharging assembly for closed discharging is arranged on the upper portion of the charging barrel, and the discharging assembly is divided into an upper discharging piece and a lower discharging piece which are arranged between the feeding bin and the charging barrel and between the charging barrel and the discharging bin respectively. According to the closed type negative pressure conveying device, due to the fact that the upper unloading piece and the lower unloading piece are designed, effective negative pressure conveying operation of flour can be achieved under the closed condition through alternate opening and closing of the upper unloading piece and the lower unloading piece, and the flour back leakage and damp conditions are avoided.

Description

Technical Field

[0001] This application relates to the field of conveying device technology, and in particular to a closed negative pressure conveying device for flour. Background Technology

[0002] In existing flour conveying technology, screw conveyors are mainly used for conveying. However, due to the small particle size of flour, it is easy for flour to leak back along the gap between the screw blades and the outer shell, resulting in a decrease in the conveying efficiency of the screw conveyor. In addition, since the screw conveyor is a non-enclosed structure, the flour is prone to jamming between the screw blades and the outer shell after it comes into contact with the outside air and becomes damp. Utility Model Content

[0003] The problem this application aims to solve is that when flour is transported using a screw conveyor, the flour, due to its small particle size, leaks back along the gap between the screw blades and the outer shell, and the flour is prone to getting damp and jamming the screw blades in non-enclosed screw conveyors.

[0004] To solve the above-mentioned technical problems, this application provides a closed negative pressure conveying device for flour, including a vertically arranged frame. The top of the frame is provided with a feeding hopper for receiving and temporarily storing flour to be conveyed, and the bottom of the frame is provided with a discharging hopper that is connected to downstream production equipment or storage containers and is responsible for outputting flour. A material cylinder is connected between the feeding hopper and the discharging hopper to form a closed conveying channel. The upper part of the material cylinder is provided with a closed unloading component, which is divided into an upper unloading component and a lower unloading component, which are respectively arranged between the feeding hopper and the material cylinder, and between the material cylinder and the discharging hopper.

[0005] Because the closed negative pressure conveying device of this application is designed with upper and lower unloading parts, the flour can be effectively conveyed under closed conditions by alternating opening and closing of the upper and lower unloading parts. This avoids flour backflow and moisture absorption, and solves the problems of flour backflow along the gap between the spiral blades and the outer shell when the flour is conveyed by the screw conveyor in the prior art, due to its small particle size, and flour easily getting damp and jamming the spiral blades in non-closed screw conveyors. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural diagram of an embodiment.

[0007] Figure 2 This is a front view structural diagram of an embodiment.

[0008] Figure 3 This is a side view of the structure of an embodiment.

[0009] Figure 4 This is a cross-sectional structural diagram of the loading and unloading component.

[0010] Figure 5 This is a schematic diagram of the first shaft and tie plate structure.

[0011] Figure 6 This is a three-dimensional structural diagram of the unloading component.

[0012] Figure 7 This is a structural schematic diagram of the second shaft, the second connecting plate, the cover plate, and the second cover plate.

[0013] Figure 8 This is a schematic diagram of the bushing structure.

[0014] In the diagram: 1. Feed hopper; 2. Upper and lower unloading components; 3. Frame; 4. Material cylinder; 5. Lower unloading components; 6. Discharge hopper; 7. Air pipe; 8. First material channel; 9. First cylinder; 10. First shaft; 11. First connecting plate; 12. First cover plate; 13. First cylinder; 14. Pull plate; 15. Second cylinder; 16. Second cylinder; 17. Second shaft; 18. Second connecting plate; 19. Cover plate; 20. Second cover plate; 21. Bushing. Detailed Implementation

[0015] The technical solutions of the 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.

[0016] This application relates to a closed negative pressure conveying device for flour, such as... Figure 1-8 As shown, the conveying device includes a vertically arranged frame 3. The top of the frame 3 is equipped with a feed hopper 1 for receiving and temporarily storing flour to be conveyed. The bottom of the frame 3 is equipped with a discharge hopper 6, which is connected to downstream production equipment or storage containers and is responsible for outputting the flour. A material cylinder 4 connects the feed hopper 1 and the discharge hopper 6 to form a closed conveying channel, ensuring the flour is sealed during conveying. The upper part of the material cylinder 4 is equipped with a sealed discharge assembly, which consists of an upper discharge component 2 and a lower discharge component 5, respectively arranged in the feed hopper. When the upper unloading component 2 is opened, flour is allowed to enter the feed cylinder 4 from the feed hopper 1; the lower unloading component 5 controls the flour to enter the discharge hopper 6 from the feed cylinder 4. Both are designed to be airtight to reduce leakage. The discharge hopper 6 and the feed hopper 1 are connected by an external air pipe 7. The bottom of the discharge hopper 6 is also connected to a negative pressure air pump. The negative pressure airflow generated by the negative pressure air pump promotes the smooth flow of flour in the feed cylinder 4, while maintaining the negative pressure state inside the system to prevent flour from leaking out.

[0017] During operation, all unloading components are first shut down, and the negative pressure air pump is started to create a negative pressure environment inside the system. Then, the upper unloading component 2 is opened, and the flour enters the feed cylinder 4 from the feed hopper 1 under the action of gravity and negative pressure airflow. As the negative pressure air pump continues to work, the flour is sucked in and moves downward along the feed cylinder 4, and finally enters the discharge hopper 6 through the opened lower unloading component 5, completing the entire conveying process. Throughout the process, the flour leakage problem is effectively avoided because the system maintains a negative pressure state.

[0018] The loading and unloading component 2 includes a first cylinder 9, a first feed channel 8, a first cylinder 13, a first connecting plate 11, a first shaft 10, a pull plate 14, and a first cover plate 12. The first cylinder 9 adopts a square structure and is installed vertically, which not only provides sufficient strength to support the internal components, but also facilitates the interface docking with the feed hopper 1 and the feed cylinder 4, ensuring the sealing of the connection. The first feed channel 8 is vertically arranged inside the first cylinder 9 and is the main channel for flour to enter the feed cylinder 4 from the feed hopper 1. Its design should ensure that the inner wall is smooth to reduce frictional resistance and residue during flour conveying. The first shaft 10 is placed horizontally inside the first cylinder 9 and serves as the fulcrum for the rotation of the first cover plate 12. The two ends of the first shaft 10 are fixed to the inner side wall of the first cylinder 9 to ensure stable rotation. The pull plate 14 is symmetrically arranged at both ends of the first shaft 10 and connected to the first cover plate 12. The pull plate 14 should be designed to have a certain rigidity and strength. So that the first cover plate 12 can be accurately and quickly pulled open and close under the drive of the cylinder. The first cover plate 12 is connected to the first shaft 10 through the pull plate 14 and can rotate around the first shaft 10 at the end of the first material channel 8. When closed, it can effectively prevent flour leakage; when open, it allows flour to flow smoothly into the material cylinder 4. The first connecting plate 11 is arranged at one end of the outside of the first cylinder 9 and is fixedly connected to the first cylinder 9. The first connecting plate 11 serves as a transmission bridge between the cylinder and the first cover plate 12, converting the linear motion of the cylinder into the rotational motion of the first cover plate 12. The first cylinder 13 is installed outside the first cylinder 9 and is connected to the first connecting plate 11 through the piston rod. The first cylinder 13 is the power source for driving the opening and closing of the first cover plate 12. It is stable and reliable in operation and can accurately perform telescopic movement according to the control signal, thereby controlling the opening and closing of the first cover plate 12.

[0019] When flour needs to be conveyed, the control system sends an open signal to the first cylinder 13. The piston rod of the first cylinder 13 extends and drives the pull plate 14 and the first cover plate 12 to rotate around the first shaft 10 through the first connecting plate 11. This causes the first cover plate 12 to move away from the end of the first material channel 8, exposing the channel and allowing flour to flow from the feed hopper 1 into the feed cylinder 4. When the flour conveying is completed, the control system sends a close signal to the first cylinder 13. The piston rod of the first cylinder 13 retracts and drives the pull plate 14 and the first cover plate 12 to rotate in the opposite direction through the first connecting plate 11. This causes the first cover plate 12 to fit tightly against the inner wall of the first material channel 8, sealing the channel and preventing flour leakage.

[0020] The unloading component 5 includes a second cylinder 16, a second cylinder 15, a second shaft 17, a bushing 21, a second connecting plate 18, a second cover plate 20, and a cover plate 19. The second cylinder 16 is vertically arranged in a straight cylindrical shape at the bottom end of the material cylinder 4, serving as the main support structure of the unloading component 5. The inner diameter of the second cylinder 16 matches that of the material cylinder 4, ensuring that the flour can flow smoothly from the material cylinder 4 into the unloading component 5. The cover plate 19 is fixedly arranged at the bottom center of the second cylinder 16, and is circular or square in shape, designed according to actual needs. The main function of the cover plate 19 is to shield and guide, ensuring that the flour can accurately fall into the discharge hopper 6 during the unloading process. The second cover plate 20 is symmetrically arranged below the cover plate 19 and can rotate around the second shaft 17. The design of the second cover plate 20 should fit tightly against the edge of the cover plate 19, effectively preventing flour leakage when closed; when open, it allows flour to flow out from below the cover plate 19. The second shaft 17 is arranged horizontally. Below the second cylinder 16, the second shaft 17 is the fulcrum for the rotation of the second cover plate 20. Its design should ensure flexible and stable rotation. The bushing 21 is fitted on the upper part of the second shaft 17 and connected to the second cover plate 20. The main function of the bushing 21 is to transmit the driving force of the second cylinder 15, so that the second cover plate 20 can rotate around the second shaft 17. The second connecting plate 18 is arranged on the outside of the second cylinder 16 and connected to both ends of the second shaft 17. The second connecting plate 18 serves as a transmission bridge between the second cylinder 15 and the second shaft 17, converting the linear motion of the second cylinder 15 into the rotational motion of the second shaft 17. The second cylinder 15 is installed on the outside of the second cylinder 16 and connected to the second connecting plate 18 through the piston rod. The second cylinder 15 is the power source for driving the opening and closing of the second cover plate 20. Its operation is stable and reliable, and it can accurately perform telescopic movement according to the control signal, thereby controlling the opening and closing of the second cover plate 20.

[0021] When the unloading component 5 needs to unload, the control system sends an opening signal to the second cylinder 15. The piston rod of the second cylinder 15 extends and drives the second shaft 17 and the second cover plate 20 to rotate through the second connecting plate 18, causing the second cover plate 20 to move away from under the cover plate 19, exposing the unloading port and allowing flour to flow into the discharge hopper 6 from under the cover plate 19. After unloading is completed, the control system sends a closing signal to the second cylinder 15. The piston rod of the second cylinder 15 retracts and drives the second shaft 17 and the second cover plate 20 to rotate in opposite directions through the second connecting plate 18, so that the second cover plate 20 fits tightly against the edge of the cover plate 19, sealing the unloading port and preventing flour leakage.

[0022] During operation, turn on the blower switch to create negative pressure in the conveying pipeline, ensuring that materials such as flour can be smoothly sucked in and conveyed along the pipeline. Pour the flour or other materials into the material cylinder 4, carefully controlling the feeding speed to avoid adding too much material at once, which could cause blockage or overflow. Monitor parameters such as negative pressure, conveying speed, and motor current in real time through the control system or on-site observation to ensure the equipment is in normal working condition. When unloading is required, send a signal to the second cylinder 15 of the lower unloading component 5 through the control system, causing it to drive the second cover plate 20 to open, allowing the flour or other materials to fall into the discharge hopper 6. After unloading is completed, send a signal again to close the second cover plate 20 to ensure sealing. When the conveying task is completed, first stop the feeding operation, then turn off the fan switch to gradually stop the equipment. Through the control system or manual operation, ensure that the residual material in the conveying pipe and the material cylinder 4 is completely emptied to avoid material accumulation causing blockage or deterioration. Thoroughly clean the conveying pipe, material cylinder 4, unloading part 5 and other components to remove the material and dust attached to the surface and prepare for the next use. After cleaning, disconnect the power and air supply of the equipment to ensure that the equipment is in a safe state.

[0023] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0024] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0025] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0026] 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 scope of the technical solutions of the embodiments of this application.

Claims

1. A closed negative pressure conveying device for flour, comprising a vertically arranged frame, characterized in that: The top of the frame is equipped with a feeding hopper for receiving and temporarily storing flour to be conveyed, and the bottom of the frame is equipped with a discharging hopper that is connected to downstream production equipment or storage containers and is responsible for outputting flour. A material cylinder is connected between the feeding hopper and the discharging hopper to form a closed conveying channel. The upper part of the material cylinder is equipped with a sealed unloading assembly, which is divided into an upper unloading component and a lower unloading component, which are respectively arranged between the feeding hopper and the material cylinder, and between the material cylinder and the discharging hopper.

2. The closed negative pressure conveying device for flour according to claim 1, characterized in that: The loading and unloading components include a first cylinder, a first material channel, and a first shaft. The first cylinder has a square structure and is arranged vertically. The first material channel is arranged vertically inside the first cylinder. The first shaft is placed horizontally inside the first cylinder and can rotate around it.

3. The closed negative pressure conveying device for flour according to claim 2, characterized in that: The loading and unloading components include a pull plate and a first cover plate. The pull plates are symmetrically arranged at both ends of the first shaft. The end of the pull plate is connected to the first cover plate, which can rotate around the end of the first material channel. The first cylinder is installed on the outside of the first cylinder and is connected to the first connecting plate through a piston rod.

4. The closed negative pressure conveying device for flour according to claim 1, characterized in that: The unloading component includes a second cylinder, a cover plate, and a second cover plate. The second cylinder is a straight cylinder arranged vertically at the bottom of the material cylinder. The cover plate is fixedly arranged at the center of the bottom of the second cylinder, and the second cover plate is symmetrically arranged below the cover plate.

5. The closed negative pressure conveying device for flour according to claim 4, characterized in that: The unloading component includes a second shaft and a bushing. The second shaft is horizontally arranged below the second cylinder, and the bushing is fitted on the upper part of the second shaft and connected to the second cover plate.

6. The closed negative pressure conveying device for flour according to claim 4, characterized in that: The unloading component includes a second connecting plate and a second cylinder. The second connecting plate is arranged on the outside of the second cylinder and connected to both ends of the second shaft. The second cylinder is installed on the outside of the second cylinder and connected to the second connecting plate through a piston rod.

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