Polygonal pipeline screw conveyor and control system thereof

Abstract

The invention relates to the technical field of spiral conveyors, in particular to a polygonal pipeline spiral conveyor and a control system thereof, the polygonal pipeline spiral conveyor comprises a material conveying pipe main body, the material conveying pipe main body is composed of an upper cover and a lower cover, one end of the material conveying pipe main body is connected with a driving mechanism, and the output end of the driving mechanism is connected with the end part of a spiral material conveying shaft in the material conveying pipe main body. The conveyor pipeline is of a hexagonal structure which can be detached up and down, the conveyor pipeline can be completely opened, the interior is more convenient to clean, a quick access hole can be formed in any position of the side edge of the pipeline, the strength of the pipeline body is not affected, and the front end and the rear end of the conveying pipe body can be separated from each other and adjusted through flanges. The direction of an outlet is convenient to adjust in the vertical conveying field; and the control system is arranged to be matched with the material adjusting mechanism, the viscosity and humidity of the materials and the rotating speed of the equipment can be monitored and controlled in a trial mode, the equipment is made to be at the optimal conveying speed, and therefore the conveying efficiency of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screw conveyors, and specifically relates to a polygonal pipe screw conveyor and its control system. Background Art

[0002] A screw conveyor is a machine that uses an electric motor to drive a screw to rotate and push materials to achieve the purpose of conveying. It can convey horizontally, obliquely or vertically, and has the advantages of simple structure, small cross-sectional area, good sealing performance, convenient operation, easy maintenance, and convenient enclosed transportation.

[0003] The existing screw conveyor pipe bodies are mostly circular and integral structures, making it difficult to thoroughly clean and maintain the interior. Also, when the existing screw conveyor conveys fluid materials, its conveying speed is affected by the viscosity and humidity of the materials. The higher the viscosity and humidity, the worse the fluidity of the materials, and the easier they are to adhere to and block. Therefore, it is necessary to reduce the rotational speed of the screw to ensure smooth conveying. However, reducing the rotational speed will affect the conveying efficiency, so improvements are needed in this regard. Summary of the Invention

[0004] The purpose of the present invention is to provide a polygonal pipe screw conveyor and its control system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A polygonal pipe screw conveyor includes a main material conveying pipe, the main material conveying pipe is composed of an upper cover and a lower cover. A driving mechanism is connected to one end of the main material conveying pipe, and the output end of the driving mechanism is connected to the end of the screw conveyor shaft inside the main material conveying pipe. An inspection opening is provided on the main material conveying pipe. An interface is opened on the upper cover, and the interface is connected to a feeding hopper. A feeding pipe is arranged above the feeding hopper, and the bottom of the feeding pipe is fixedly connected to the feeding hopper through a docking cover. A material adjusting mechanism is arranged on the feeding pipe.

[0006] Preferably, the main material conveying pipe is a hexagonal pipe. Since the upper cover and the lower cover can be separated by bolt connection, cleaning is more convenient. The front and rear ends of the main material conveying pipe are separable structures, and the front and rear ends are connected by flanges.

[0007] Preferably, the driving mechanism is a driving motor equipped with a speed reducer.

[0008] Preferably, the inspection opening can be arranged on the upper cover or the lower cover. A separable section is provided on the lower cover, and the inspection opening is opened on the separable section. A sealing structure (for increasing the sealing performance at the gap) is arranged at the connection between the separable section and other sections of the lower cover. The separable section and the rest are both fixedly connected to the upper cover by bolts. A sealing plate is arranged at the opening of the inspection opening, and the sealing plate is fixed at the opening by bolts.

[0009] Preferably, the material regulating mechanism includes a regulating part arranged in the middle of the feeding pipe. A rotating block is rotatably arranged inside the regulating part. The lower section of the upper inclined surface of the rotating block fits against the inner upper side wall of the regulating part. There is an evenly divided space between the upper section of the upper inclined surface of the rotating block and the inner upper side wall of the regulating part. Several material dropping holes are formed in the rotating block. The upper openings of the material dropping holes are located at the bottom of the evenly divided space, and the lower openings of the material dropping holes are located at the bottom of the rotating block. A spiral shaft is rotatably arranged in the material dropping holes. The bottom of the spiral shaft is rotatably inserted into the cavity inside the rotating block and the bottom end is connected with a first gear. A fixing frame is installed inside the regulating part. The upper end of the fixing frame is rotatably inserted into the cavity. A second gear is arranged at the top of the fixing frame. The second gear is meshed and connected with the adjacent first gear. The top of the rotating block is connected with a connecting shaft. The connecting shaft is driven by a motor control. An adding component is arranged on the upper side wall of the regulating part.

[0010] Preferably, the adding component includes a convex ring. An annular cavity is arranged in the convex ring. Several adding pipes communicating with the annular cavity are arranged at the top of the convex ring. Several inner pipes are rotatably arranged in the annular cavity. The upper ends of the inner pipes are open, and the lower ends extend into the evenly divided space. Material discharging ports are formed in the side walls at the bottom ends of the inner pipes. A fixing rod is arranged inside the inner pipes. The top end of the fixing rod is fixed on the convex ring. A side rod is arranged at the bottom of the fixing rod. The end of the side rod is inserted into the material discharging port. An external tooth ring is arranged on the upper side wall of the upper end of the inner pipes. A rotating ring is arranged at the top of the convex ring. A driving tooth ring is connected to the bottom of the rotating ring. The driving tooth ring is meshed and connected with the external tooth ring. An external tooth ring is connected to the top of the rotating ring.

[0011] Preferably, the external tooth ring is used for being meshed and connected with the gear equipped with an adjusting motor installed outside the regulating part.

[0012] A control system of a polygonal pipeline screw conveyor includes a processing module, an acquisition module and an adjustment module. The output end of the acquisition module is connected to the input end of the processing module. The output end of the processing module is connected to the input end of the adjustment module;

[0013] The acquisition module is used for acquiring the viscosity and humidity data of the conveyed material and transmitting the acquired material viscosity and humidity data to the processing module;

[0014] The processing module is used for calculating the optimal equipment rotation speed according to the viscosity and humidity or calculating the appropriate humidity and viscosity of the material according to the optimal equipment rotation speed, and then outputting the calculated result to the adjustment module;

[0015] The adjustment module includes a material adjustment module and a rotation speed adjustment module. After receiving the data transmitted by the processing module, the adjustment module adjusts the equipment rotation speed or the material viscosity and humidity according to the received data.

[0016] Preferably, the calculation formula for the optimal rotational speed, material humidity, and viscosity by the processing module is as follows:

[0017]

[0018] where n opt is the optimal rotational speed, w is the material humidity, μ is the material viscosity, k0 is the reference rotational speed constant, which is related to the geometric parameters of the screw conveyor and the material type, k1 is the humidity influence coefficient, indicating the sensitivity of humidity to the rotational speed, and k2 is the viscosity influence coefficient, indicating the sensitivity of viscosity to the rotational speed.

[0019] Preferably, the material adjustment module adjusts the viscosity and humidity of the material through a material adjustment mechanism, and the rotational speed adjustment module adjusts the equipment rotational speed by controlling the drive motor connected to the screw conveyor.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] A polygonal pipe screw conveyor and its control system proposed by the present invention. The conveyor pipe adopts a hexagon structure that can be split up and down, can be fully opened, and it is more convenient to clean the inside. Moreover, quick maintenance openings can be opened at any position on the side of the pipe without affecting the strength of the pipe body. The front and rear ends of the main body of the material conveying pipe can be separated from each other and adjusted through flanges, which is convenient for adjusting the outlet direction in the vertical conveying field. And by setting up a control system in cooperation with the material adjustment mechanism, it is possible to monitor and control the viscosity, humidity of the material, and the rotational speed of the equipment, so that the equipment is at the optimal conveying speed, thereby improving the conveying efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the device of the present invention.

[0023] Figure 2 is a schematic structural diagram of the bottom of the device of the present invention.

[0024] Figure 3 is a schematic structural diagram of the material adjustment mechanism of the present invention.

[0025] Figure 4 is a schematic structural diagram of the adjustment part of the present invention.

[0026] Figure 5 is a schematic structural diagram of the convex ring of the present invention.

[0027] Figure 6 is a top view of the fixed rod connection structure of the present invention.

[0028] Figure 7 is a schematic structural diagram of the control system of the present invention.

[0029] In the figure: upper cover 1, lower cover 2, docking port 3, drive mechanism 4, maintenance port 5, feeding hopper 6, docking cover 7, feeding pipe 8, adjustment part 9, connecting shaft 10, rotating block 11, blanking hole 12, spiral shaft 13, first gear 14, fixing bracket 15, second gear 16, convex ring 17, inner pipe 18, fixing rod 19, side rod 20, external gear ring 21, rotating ring 22, drive gear ring 23, external gear ring 24, adding pipe 25. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a polygonal pipeline screw conveyor, including a main material conveying pipe. The main material conveying pipe is composed of an upper cover 1 and a lower cover 2. The main material conveying pipe is a hexagonal pipeline. Since the upper cover 1 and the lower cover 2 can be separated by bolt connection, cleaning is more convenient. The front and rear ends of the main material conveying pipe are separable structures and are connected by flanges, which can be disassembled and connected. In the field of vertical conveying, two main material conveying pipes can be connected, and the orientation of the outlet can be adjusted by 360°.

[0032] A drive mechanism 4 is connected to one end of the main material conveying pipe. The drive mechanism 4 is a drive motor equipped with a reducer. The output end of the drive mechanism 4 is connected to the end of the screw conveyor shaft inside the main material conveying pipe. A maintenance port 5 is provided on the main material conveying pipe. A docking port 3 is opened on the upper cover 1. The docking port 3 is connected to a feeding hopper 6. When the docking port 3 is connected to the feeding hopper 6, it is used as a feeding port. The docking port 3 can also be connected to a docking pipe and then a flange is set to be vertically docked with other conveyors, enabling vertical material transfer. Only the end of another conveyor needs to be equipped with a flange that can be docked. The size of the docking port 3 and the installed device can be adjusted adaptively according to production requirements. This solution is described by taking the use as a feeding port for improvement. If it is only used for docking with other conveyors, the following structure is not required. A feeding pipe 8 is provided above the feeding hopper 6. The bottom of the feeding pipe 8 is fixedly connected to the feeding hopper 6 through a docking cover 7. A material adjustment mechanism is provided on the feeding pipe 8.

[0033] The maintenance opening 5 can be provided on the upper cover 1 or the lower cover 2. A separable section is provided on the lower cover 2 or the upper cover 1. The maintenance opening 5 is opened on the separable section. A sealing structure (for increasing the sealing performance at the gap) is provided at the connection between the separable section and other sections of the lower cover 2. The separable section and the rest are fixedly connected to the upper cover 1 through bolts. A sealing plate is provided at the opening of the maintenance opening 5, and the sealing plate is fixed at the opening through bolts. Similarly, the maintenance opening 5 provided on the upper cover 1 is also arranged through the same structure. The maintenance opening 5 can be provided at any position of the main body of the material conveying pipe.

[0034] The material regulating mechanism includes a regulating part 9 provided in the middle of the feeding pipe 8. A rotating block 11 is rotatably provided inside the regulating part 9. The lower section of the upper inclined surface of the rotating block 11 is attached to the inner upper side wall of the regulating part 9. There is an evenly divided space between the upper section of the upper inclined surface of the rotating block 11 and the inner upper side wall of the regulating part 9. Several material dropping holes 12 are opened in the rotating block 11. The upper opening of the material dropping hole 12 is located at the bottom of the evenly divided space, and the lower opening of the material dropping hole 12 is located at the bottom of the rotating block 11. A spiral shaft 13 is rotatably provided in the material dropping hole 12. The bottom of the spiral shaft 13 is rotatably inserted into the cavity inside the rotating block 11 and the bottom end is connected with a first gear 14. A fixing frame 15 is installed inside the regulating part 9. The upper end of the fixing frame 15 is rotatably inserted into the cavity. A second gear 16 is provided at the top of the fixing frame 15. The second gear 16 is meshed and connected with the first gear 14 on the side. The top of the rotating block 11 is connected with a connecting shaft 10, and the connecting shaft 10 is driven by a motor control. An adding component is provided on the upper side wall of the regulating part 9.

[0035] The adding component includes a convex ring 17. An annular cavity is provided in the convex ring 17. Several adding pipes 25 communicating with the annular cavity are provided at the top of the convex ring 17. Several inner pipes 18 (which can be installed through bearings) are rotatably provided in the annular cavity. The upper end of the inner pipe 18 is open, and the lower end extends into the evenly divided space. A discharge port is opened on the side wall at the bottom end of the inner pipe 18. A fixing rod 19 is provided inside the inner pipe 18. The top end of the fixing rod 19 is fixed on the convex ring 17. A side rod 20 is provided at the bottom of the fixing rod 19, and the end of the side rod 20 is inserted into the discharge port. An external toothed ring 21 is provided on the upper side wall of the inner pipe 18. A rotating ring 22 is provided at the top of the convex ring 17. A driving toothed ring 23 is connected to the bottom of the rotating ring 22. The driving toothed ring 23 is meshed and connected with the external toothed ring 21. An external toothed ring 24 is connected to the top of the rotating ring 22. The external toothed ring 24 is used to be meshed with the gear equipped with an adjusting motor installed outside the regulating part 9, which is not shown in the figure here. The installation position of the adjusting motor is determined according to the actual installation requirements of the equipment, as long as the controllable adjustment of the external toothed ring 24 can be satisfied.

[0036] The material regulating mechanism is used to regulate the viscosity and humidity of the material. The material is divided into thin portions from the upper end of the feeding pipe 8 and enters the equalizing space in the regulating part 9. If it is detected that the material needs to have its viscosity or humidity regulated, agents that can change the viscosity or humidity (such as thickeners, viscosity reducers, water, and other additives that do not affect the service performance of the material) can be added to the material through the adding component. Then, the connecting shaft 10 and the rotating block 11 are driven to rotate by the motor. The first gear 14 rotates around the second gear 16, which can drive the screw shaft 13 to rotate. The screw shaft 13 conveys the material to the blanking hole 12, stirs and mixes it, and then conveys it downward. Then, the material falls into the feeding hopper 6 and enters the main body of the conveying pipe.

[0037] When the adding component adds the agent, the agent is injected into the annular cavity through the adding pipe 25, and then the agent enters the inner pipe 18. At this time, when the outer tooth ring 24 is controlled to rotate, it drives the driving tooth ring 23 and the outer tooth ring 21 to rotate accordingly. The inner pipe 18 rotates, causing the side rod 20 to be withdrawn from the discharge hole, and the agent then flows into the material. The pressure is greater than the pressure of the external material, so the material will not enter the inner pipe 18. To increase the dosing efficiency, one or more groups of adding components can be set. When dosing is not required, the outer tooth ring 24 is controlled to rotate in the reverse direction, causing the inner pipe 18 to rotate. The side rod 20 is inserted into the discharge hole at the bottom of the inner pipe 18 to block it, preventing the material from blocking the discharge hole.

[0038] A control system for a polygonal pipe screw conveyor includes a processing module, an acquisition module, and an adjustment module. The output end of the acquisition module is connected to the input end of the processing module, and the output end of the processing module is connected to the input end of the adjustment module. The acquisition module is used to acquire the viscosity and humidity data of the conveyed material and transmit the acquired material viscosity and humidity data to the processing module. The acquisition module provides an operation interface, through which the viscosity and humidity of the material can be input, and other relevant data can also be input. The methods for acquiring the viscosity and humidity of the material include sensor detection and experimental detection by taking a material sample from the sampling port, and the sampling port is arranged on the side wall of the feeding pipe 8.

[0039] The processing module is used to calculate the optimal equipment rotation speed based on the viscosity and humidity or calculate the appropriate humidity and viscosity of the material based on the optimal equipment rotation speed, and then output the calculated result to the adjustment module. The calculation formulas for the processing module to calculate the optimal rotation speed and the material humidity and viscosity are:

[0040]

[0041] where, n optLet \(n\) be the optimal rotational speed (in rpm), \(w\) be the material humidity, \(\mu\) be the material viscosity (in Pa·s), \(k_0\) be the reference rotational speed constant, which is related to the geometric parameters of the screw conveyor (such as screw diameter, pitch) and the material type, \(k_1\) be the humidity influence coefficient, representing the sensitivity of humidity to rotational speed, \(k_2\) be the viscosity influence coefficient, representing the sensitivity of viscosity to rotational speed. The latter two coefficients are usually greater than 0. The formula reflects the trend that the rotational speed decreases non-linearly with humidity and viscosity, which is in line with actual engineering experience (wet and sticky materials need to be conveyed at low speeds to avoid blockage). From the above formula, when the humidity \(w\) and viscosity \(\mu\) increase, the denominators \((1 + k_1w)\) and \((1 + k_2\mu)\) increase, resulting in a decrease in \(n\). opt This reduces the conveying efficiency. Therefore, in order to ensure stable conveying efficiency, it is also necessary to adjust the viscosity and humidity of the material;

[0042] In a specific embodiment, \(k_0\), \(k_1\), and \(k_2\) are 30, 5, and 10 respectively, the humidity is 0.2, and the viscosity is 0.05. Here, the calculated optimal rotational speed is:

[0043]

[0044] This formula is a semi-empirical model. In practical applications, three coefficients need to be calibrated according to experiments, and for other factors (such as screw filling rate, material density), correction terms (such as multiplying by \(\rho\) -0.5 or \(\varphi\) -1 ) may need to be introduced.

[0045] The three coefficients \(k_0\), \(k_1\), and \(k_2\) are very important for the correct calculation of the formula. Among them, \(k_0\) is the reference rotational speed under ideal conditions (i.e., when the material humidity and viscosity are both zero), and it mainly depends on the geometric parameters (such as screw diameter, pitch) and design parameters of the screw conveyor. Therefore, the standard rotational speed can be selected as \(k_0\) according to the design manual of the screw conveyor or the data provided by the manufacturer. Assuming that the standard rotational speed recommended by the screw conveyor design manual is 60 rpm, then \(k_0\) is 60 rpm.

[0046] \(k_1\) reflects the sensitivity of material humidity to the optimal rotational speed and is usually obtained by fitting experimental data. Here, an experiment is designed: under the condition of fixed viscosity, change the material humidity \(w\) and measure the optimal rotational speed \(n\) at different humidities opt , and then substitute the experimental data \((w, n\) opt ) into the following formula to obtain \(k_1\) through non-linear regression fitting:

[0047]

[0048] In the experimental data, \(w\) and \(n\) opt are 0.1, 0.2, 0.3 and 55, 45, 37 respectively; thus, \(k_1\) is obtained as 2.5 by fitting.

[0049] k2 reflects the sensitivity of the material viscosity to the optimal rotational speed. The acquisition method is similar to that of k1. Here, an experiment is designed: under the condition of fixed humidity, change the material viscosity μ and measure the optimal rotational speed n at different viscosities. opt , and then substitute the experimental data (μ, n opt ) into the following formula, and obtain k2 through non-linear regression fitting:

[0050]

[0051] In the experimental data, μ and n opt are respectively: 0.01, 0.05, 0.1 and 58, 40, 30; thus, the fitted k2 is 15.

[0052] In an embodiment, the three coefficients k0, k1 and k2 obtained above are 60, 2.5 and 15 respectively. For the material with a humidity of 0.2 and a viscosity of 0.05, the optimal rotational speed is calculated as follows:

[0053]

[0054]

[0055] Therefore, the optimal rotational speed is 22.86 rpm. If the rotational speed is not this value, the rotational speed needs to be adjusted. If the rotational speed needs to be increased to improve the conveying efficiency, then the viscosity or humidity of the material needs to be adjusted. It should be noted that the experimental conditions should be as close as possible to the actual working conditions. For different materials, the coefficients may vary greatly and need to be calibrated separately; during long-term operation, factors such as equipment wear and material property changes may require recalibration of the coefficients; through the above method, the key coefficients in the optimal rotational speed formula of the screw conveyor can be obtained for optimizing the design and operation control.

[0056] The adjustment module includes a material adjustment module and a rotational speed adjustment module. After receiving the data transmitted by the processing module, the adjustment module adjusts the rotational speed of the equipment or the viscosity and humidity of the material according to the received data. The material adjustment module adjusts the viscosity and humidity of the material through a material adjustment mechanism. The rotational speed adjustment module adjusts the rotational speed of the equipment by controlling the driving motor connected to the screw conveyor, that is, controls the driving power of the driving mechanism 4 to adjust the rotational speed of the equipment.

[0057] A polygonal pipeline screw conveyor and its control system proposed by the present invention. The conveyor pipeline adopts a hexagonal structure that can be disassembled up and down, can be completely opened, and is more convenient for cleaning the inside. Moreover, quick maintenance openings can be opened at any part on the side of the pipeline without affecting the strength of the pipeline body. The front and rear ends of the main body of the material conveying pipe can be separated from each other and adjusted through flanges, which is convenient for adjusting the outlet direction in the vertical conveying field. And by setting up a control system in cooperation with a material regulating mechanism, the viscosity, humidity of the material and the rotation speed of the equipment can be monitored and controlled, so that the equipment is at the best conveying speed, thereby improving the conveying efficiency of the equipment.

[0058] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polygonal pipe screw conveyor, comprising a main material conveying pipe, characterized in that: The main body of the feeding pipe is composed of an upper cover and a lower cover. A driving mechanism is connected to one end of the main body of the feeding pipe. The output end of the driving mechanism is connected to the end of the screw feeding shaft inside the main body of the feeding pipe. An inspection opening is provided on the main body of the feeding pipe. An interface is opened on the upper cover, and a feeding hopper is connected to the interface. A feeding pipe is arranged above the feeding hopper. The bottom of the feeding pipe is fixedly connected to the feeding hopper through a docking cover. A material adjusting mechanism is arranged on the feeding pipe.

2. The polygonal pipe screw conveyor according to claim 1, characterized in that: The main body of the feeding pipe is a hexagonal pipe. Since the upper cover and the lower cover can be separated by bolt connection, it is more convenient to clean. The front and rear ends of the main body of the feeding pipe are separable structures and are connected by flanges.

3. A polygonal pipe screw conveyor according to claim 1, characterized in that: The driving mechanism is a driving motor equipped with a speed reducer.

4. A polygonal pipe screw conveyor according to claim 1, characterized in that: The inspection opening can be arranged on the upper cover or the lower cover. A separable section is arranged on the lower cover, and the inspection opening is opened on the separable section. A sealing structure is arranged at the connection between the separable section and other sections of the lower cover. The separable section and the rest are both fixedly connected to the upper cover by bolts. A sealing plate is arranged at the opening of the inspection opening, and the sealing plate is fixed at the opening by bolts.

5. A polygonal pipe screw conveyor according to claim 1, characterized in that: The material adjusting mechanism includes an adjusting part arranged in the middle of the feeding pipe. A rotating block is rotatably arranged inside the adjusting part. The lower section of the upper inclined surface of the rotating block fits against the inner side wall at the upper end of the adjusting part. There is an evenly divided space between the upper section of the upper inclined surface of the rotating block and the inner side wall at the upper end of the adjusting part. Several material dropping holes are opened in the rotating block. The upper opening of the material dropping hole is located at the bottom of the evenly divided space, and the lower opening of the material dropping hole is located at the bottom of the rotating block. A spiral shaft is rotatably arranged in the material dropping hole. The bottom of the spiral shaft is rotatably inserted into the cavity inside the rotating block and the bottom end is connected to a first gear. A fixing frame is installed inside the adjusting part, and the upper end of the fixing frame is rotatably inserted into the cavity. A second gear is arranged at the top of the fixing frame, and the second gear is meshed and connected with the first gear on the side. The top of the rotating block is connected with a connecting shaft, and the connecting shaft is driven by a motor control. An adding component is arranged on the side wall at the upper end of the adjusting part.

6. A polygonal pipe screw conveyor according to claim 5, characterized in that: The adding component includes a convex ring. An annular cavity is arranged in the convex ring. Several adding pipes communicating with the annular cavity are arranged at the top of the convex ring. Several inner pipes are rotatably arranged in the annular cavity. The upper end of the inner pipe is open, and the lower end extends into the evenly divided space. A discharge port is opened on the side wall at the bottom end of the inner pipe. A fixing rod is arranged inside the inner pipe, and the top end of the fixing rod is fixed on the convex ring. A side rod is arranged at the bottom of the fixing rod, and the end of the side rod is inserted into the discharge port. An external tooth ring is arranged on the side wall at the upper end of the inner pipe. A rotating ring is arranged at the top of the convex ring. The bottom of the rotating ring is connected with a driving tooth ring, and the driving tooth ring is meshed and connected with the external tooth ring. The top of the rotating ring is connected with an external tooth ring.

7. A polygonal pipe screw conveyor according to claim 6, characterized in that: The external tooth ring is used to be meshed and connected with the gear equipped with the adjusting motor installed outside the adjusting part.

8. A control system for a polygonal pipeline screw conveyor according to any one of claims 1-7, characterized in that: It includes a processing module, an acquisition module and an adjustment module. The output end of the acquisition module is connected to the input end of the processing module, and the output end of the processing module is connected to the input end of the adjustment module; The acquisition module is used to acquire the viscosity and humidity data of the conveyed material and transmit the acquired material viscosity and humidity data to the processing module; The processing module is used to calculate the optimal equipment rotation speed based on the viscosity and humidity or calculate the appropriate humidity and viscosity of the material based on the optimal equipment rotation speed, and then output the calculated result to the adjustment module; The adjustment module includes a material adjustment module and a rotation speed adjustment module. After receiving the data transmitted by the processing module, the adjustment module adjusts the equipment rotation speed or the material viscosity and humidity according to the received data.

9. The control system of a polygonal pipe screw conveyor according to claim 8, characterized in that: The acquisition module provides an operation interface. Through the operation interface, the viscosity and humidity of the material are input. The acquisition methods of the material viscosity and humidity include sensor detection and experimental detection by taking out a material sample from the material taking port.

10. The control system of a polygonal pipeline screw conveyor according to claim 8, characterized in that: The calculation formulas of the processing module for calculating the optimal rotation speed and the material humidity and viscosity are: where n opt is the optimal rotational speed, w is the moisture content of the material, μ is the viscosity of the material, k0 is the reference rotational speed constant, which is related to the geometric parameters of the screw conveyor and the type of material, k1 is the moisture influence coefficient, indicating the sensitivity of the rotational speed to the moisture, and k2 is the viscosity influence coefficient, indicating the sensitivity of the rotational speed to the viscosity.

11. The control system of a polygonal pipeline screw conveyor according to claim 8, characterized in that: The material adjustment module adjusts the viscosity and humidity of the material through a material adjustment mechanism, and the rotation speed adjustment module adjusts the equipment rotation speed by controlling the drive motor connected to the screw conveyor.

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