Flour conveying adjusting device

Abstract

The utility model discloses a flour conveying adjusting device which comprises a machine frame, a control unit, an auger conveying device and a material pipe, a sealing plate is arranged at the connecting position of the auger conveying device and the material pipe, and the sealing plate is connected with the end of the corresponding auger conveying device through an elastic reset assembly. A material level sensor is arranged in the end, corresponding to the material pipe, of the auger conveying device, and a displacement sensor is arranged on the outer side wall of the auger conveying device. And the accurate recognition capability of the blockage and the sensitivity of monitoring and early warning are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of flour conveying equipment, and in particular to a flour conveying adjustment device. Background Technology

[0002] Flour production is a complex process involving multiple coordinated steps, including grinding, sieving, mixing, conveying, and packaging. Among these, the powder conveying equipment acts as the "artery" connecting these steps, directly impacting production efficiency, product quality, and safety. Currently, the mainstream conveying technologies in the industry mainly include mechanical conveying and pneumatic conveying. Mechanical conveying technology, represented by screw conveyors, uses rotating helical blades to propel powder along a pipeline, featuring simple structure, low cost, and good sealing. Pneumatic conveying technology utilizes the negative or positive pressure created by airflow within a closed pipeline to transport powder, and can be categorized into dilute phase, dense phase, and ultra-dense phase conveying.

[0003] While the aforementioned technologies meet production needs to some extent, their inherent shortcomings are becoming increasingly apparent with the large-scale and intelligent development of flour processing. Chinese patent application number "2021204242448" discloses an automatic intelligent anti-blocking system for flour packaging. This system uses a PLC control system electrically connected to a flour discharge switch and a variable frequency motor, allowing the screw conveyor to adjust its speed according to the packaging workers' speed, effectively preventing blockages in the flour conveying channel. A resistive diaphragm pressure sensor is also included; when the pressure reaches the set value of the PLC control system, the system stops the variable frequency motor, further preventing blockages. However, in actual production, the system relies on a single pressure sensor and lacks a buffer device between the screw conveyor and the pipeline, making it impossible to quantify the degree of powder accumulation in real time and accurately identify blockages. Clearing blockages requires manual disassembly of the pipeline, resulting in complex and inefficient operations. Utility Model Content

[0004] The purpose of this invention is to provide a flour conveying adjustment device, which not only has an adjustment buffer device on the conveying device to facilitate manual clearing of blockages, but also adds a material level sensor and a displacement sensor to the conveying device to improve the accuracy of blockage identification and the sensitivity of monitoring and early warning, thereby solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A flour conveying and regulating device includes a frame, a control unit located on one side of the frame, an auger conveyor on the frame, and a material pipe connected to the discharge end of the auger conveyor. A sealing plate is provided at the connection between the auger conveyor and the material pipe. The sealing plate is connected to the corresponding end of the auger conveyor via an elastic reset component. A material level sensor is provided inside one end of the auger conveyor corresponding to the material pipe, and a displacement sensor is provided on the outer wall of the auger conveyor.

[0007] Furthermore, the elastic reset assembly includes several sleeves disposed on the closed plate, several guide rods disposed on the pipe wall of the auger conveyor and passing through the corresponding sleeves, and elastic elements disposed inside the corresponding sleeves. Each elastic element is sleeved on the outside of the corresponding guide rod. A limiting cap is provided at one end of the guide rod near the sleeve. One end of the elastic element abuts against the inner wall of the sleeve, and the other end abuts against the limiting cap.

[0008] Furthermore, the sealing plate is a prototype thick plate, and several sleeves are evenly distributed on the outer circular end face of the sealing plate along the center direction of the sealing plate.

[0009] Furthermore, the displacement sensor is a linear displacement sensor, the measuring component of the linear displacement sensor is located on the pipe wall of the auger conveyor, the reading head of the linear displacement sensor is located on the outer circular end face of the closed plate, and the displacement sensor is electrically connected to the control unit.

[0010] Furthermore, the level sensor is a rotary paddle level sensor, the detection end of the level sensor extends to the feed inlet of the feed pipe, and the trigger threshold of the level sensor matches the maximum allowable displacement of the sealing plate.

[0011] The beneficial effects of this utility model are as follows: By installing a sealing plate at the connection between the auger conveyor and the material pipe, and by matching the elastic reset component with the sealing plate to form a mechanical feedback structure, this utility model achieves more reliable and low-maintenance blockage monitoring. At the same time, by adding a material level sensor and a displacement sensor to the conveyor, the power unit of the auger conveyor is controlled to start and stop through the control unit by the signal feedback from the material level sensor and the displacement sensor, thereby improving the accurate identification of blockages and the sensitivity of monitoring and early warning. Attached Figure Description

[0012] Figure 1 Overall structural diagram of the flour conveying and regulating device provided by this utility model;

[0013] Figure 2 This is a front view of the flour conveying and adjusting device provided by this utility model;

[0014] Figure 3 A partial sectional view of the flour conveying and adjusting device provided by this utility model;

[0015] Figure 4 A cross-sectional view of the elastic reset component provided by this utility model.

[0016] The diagram shows the following labels: 100, frame; 200, control unit; 300, auger conveyor; 400, material pipe; 500, sealing plate; 600, elastic reset assembly; 610, sleeve; 620, guide rod; 621, limit cap; 630, elastic element; 700, material level sensor; 800, displacement sensor; 900, inspection screen device. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The following is an example:

[0020] A flour conveying and regulating device includes a frame 100, a control unit 200 mounted on one side of the frame 100, an auger conveyor 300 fixed to the frame 100 by bolts, and a material pipe 400 communicating with the discharge end of the auger conveyor 300. The material pipe 400 is connected to the discharge end of the auger conveyor 300 via a flange. A sealing plate 500 is installed at the connection between the auger conveyor 300 and the material pipe 400. The sealing plate 500 is connected to the corresponding end of the auger conveyor 300 via an elastic reset component 600. A material level sensor 700 is installed inside the end of the auger conveyor 300 corresponding to the material pipe 400 by bolts. A displacement sensor 800 is provided on the outer wall of the auger conveyor 300. Specifically, the auger conveyor structure is similar to that of the screw conveyor disclosed in Chinese Patent Application No. "2021204242448". The same applies, which is common knowledge in this field and will not be elaborated here. The servo motor driving the auger conveyor 300 is electrically connected to the control unit 200. The displacement sensor 800 is a KTC-100 linear displacement sensor 800. The calibrating component of the linear displacement sensor 800 is located on the pipe wall of the auger conveyor 300, and the reading head of the linear displacement sensor 800 is located on the outer circular end face of the sealing plate 500. The displacement sensor 800 is electrically connected to the control unit 200. The level sensor 700 is a KSE2018 rotary paddle level controller. The blades and contact parts of the rotary paddle level controller are made of 316L stainless steel with a surface roughness Ra≤0.8μm, which is not only corrosion-resistant and non-leaching, but also easy to clean. The bearing adopts a fully sealed design and uses food-grade fluororubber seals to prevent flour intrusion. The lubricating oil complies with NSF standards. H1 certification allows for occasional food contact, thus meeting food safety requirements for detecting flour level in flour production. The detection end of the level sensor 700 extends to the feed inlet of the feed pipe 400. The trigger threshold of the level sensor 700 matches the maximum allowable displacement of the sealing plate 500. The servo motors of the level sensor 700 and the auger conveyor 300 are both electrically connected to the control unit 200.

[0021] To avoid frequent replacement or cleaning of the rotary paddle level controller's components, the level sensor 700 can be replaced with a capacitive level sensor. In this embodiment, the capacitive level sensor is a VEGACAP66 capacitive proximity switch. The probe of this capacitive level sensor is made of pure PTFE. Therefore, the capacitive level sensor is installed on the side wall of the feed inlet of the feed pipe 400, which meets the food-grade design requirements for flour processing.

[0022] When the inspection sieve device 900 malfunctions or the feed pipe 400 becomes blocked, the flour pressure will push the sealing plate 500 to move. The displacement sensor 800 detects the displacement of the sealing plate 500 in real time and feeds it back to the control unit 200. When the displacement of the sealing plate 500 reaches the maximum allowable displacement, the control unit 200 receives the signal from the displacement sensor 800 and sends a command to the servo motor to shut down the auger conveyor 300, thereby stopping the flour conveying operation.

[0023] If the displacement sensor 800 malfunctions and cannot be used, when the feed pipe 400 is blocked, the flour level in the feed pipe 400 will continue to rise. When the level rises to the detection end of the level sensor 700, the flour will generate resistance and prevent the blades of the level sensor 700 from rotating. Then, the level sensor 700 sends a signal to the control unit 200, and the control unit 200 sends a command to the servo motor to shut down the auger conveyor 300, thereby stopping the flour conveying operation. The principle of early warning feedback through the displacement sensor 800 when the level sensor 700 malfunctions is as described above.

[0024] Compared with existing technologies, this technical solution achieves more reliable and low-maintenance blockage monitoring by installing a sealing plate 500 at the connection between the auger conveyor 300 and the material pipe 400, and by matching the elastic reset component 600 and the sealing plate 500 to form a mechanical feedback structure. In addition, not only does the displacement sensor 800 monitor the displacement of the sealing plate 500 to reflect the pressure of the blocked flour in the material pipe 400, but the detection section of the material level sensor 700 is also installed at the inlet of the material pipe 400 to directly monitor the material level height. Thus, multiple sensors work together to provide early warning of flour blockage in the material pipe 400.

[0025] As a further technical solution in this embodiment, the elastic reset assembly 600 includes four sleeves 610 welded to the closed plate 500, four guide rods 620 fastened to the pipe wall of the auger conveyor 300 by double nuts and passing through the corresponding sleeves 610, and elastic elements 630 installed in the corresponding sleeves 610. The elastic elements 630 are compression springs. Each elastic element 630 is sleeved on the outside of the corresponding guide rod 620. A limiting cap 621 is provided at one end of the guide rod 620 near the sleeve 610. One end of the elastic element 630 abuts against the inner wall of the sleeve 610, and the other end abuts against the limiting cap 621. The closed plate 500 is a circular thick plate. The four sleeves 610 are evenly distributed on the outer circular end face of the closed plate 500 along the center direction of the closed plate 500. A limiting sliding wing 510 is welded to one side of the closed plate 500 corresponding to the auger conveyor 300 to ensure that the closed plate 500 can move in a straight line.

[0026] The sealing plate 500 is located at the connection between the discharge end of the auger conveyor 300 and the material pipe 400, and is connected to the end of the auger conveyor 300 through the elastic reset component 600. When the material pipe 400 is blocked, the flour pressure pushes the sealing plate 500 to move, and the displacement sensor 800 detects the displacement in real time and feeds it back to the control unit 200. The degree of blockage is reflected directly by the physical displacement, rather than relying on the electronic pressure sensing of the inner wall of the pipe, which further improves the ability to accurately identify blockages.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flour conveying and regulating device, comprising a frame, a control unit disposed on one side of the frame, an auger conveyor disposed on the frame, and a material pipe communicating with the discharge end of the auger conveyor, characterized in that: The connection between the auger conveyor and the material pipe is provided with a sealing plate. The sealing plate is connected to the end of the corresponding auger conveyor through an elastic reset component. A material level sensor is provided inside one end of the auger conveyor corresponding to the material pipe, and a displacement sensor is provided on the outer wall of the auger conveyor.

2. The flour conveying and regulating device according to claim 1, characterized in that: The elastic reset assembly includes several sleeves on the closed plate, several guide rods on the pipe wall of the auger conveyor and passing through the corresponding sleeves, and elastic elements inside the corresponding sleeves. Each elastic element is sleeved on the outside of the corresponding guide rod. A limiting cap is provided at one end of the guide rod near the sleeve. One end of the elastic element abuts against the inner wall of the sleeve, and the other end abuts against the limiting cap.

3. The flour conveying and regulating device according to claim 2, characterized in that: The sealing plate is a prototype thick plate, and several sleeves are evenly distributed on the outer circular end face of the sealing plate along the center direction of the sealing plate.

4. The flour conveying and regulating device according to claim 1, characterized in that: The displacement sensor is a linear displacement sensor. The fixed-length component of the linear displacement sensor is located on the pipe wall of the auger conveyor. The reading head of the linear displacement sensor is located on the outer circular end face of the closed plate. The displacement sensor is electrically connected to the control unit.

5. The flour conveying and regulating device according to claim 1, characterized in that: The level sensor is a rotary paddle level sensor, and the detection end of the level sensor extends to the feed inlet of the feed pipe. The trigger threshold of the level sensor is matched with the maximum allowable displacement of the sealing plate.

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