Main material and auxiliary material conveying, weighing and mixing system

Abstract

The utility model discloses a main material and auxiliary material conveying, weighing and blending system which comprises a main material feeding area, an auxiliary material feeding area, a blending area, a material mixing and storing area and an extrusion area. Two groups of main material feeding bins and two groups of ground powder feeding bins are arranged in the main material feeding area; two groups of multi-component auxiliary material formulating machines are arranged in the auxiliary material feeding area; two groups of blending units are arranged in the blending area; at least two groups of material mixing and storing units are arranged in the material mixing and storing area; and a plurality of groups of extrusion units are arranged in the extrusion area. The whole production line is formed by automatically feeding main materials, automatically feeding auxiliary materials, conveying, weighing, mixing and extruding, so that the production efficiency is greatly improved, and the production cost is reduced; in addition, the problem that materials with poor fluidity are difficult to convey in a long distance is solved.

Description

Technical Field

[0001] This utility model relates to a mixing and extrusion production line, and more particularly to a main material and auxiliary material conveying, weighing and mixing system. Background Technology

[0002] Currently, in compound extrusion production lines, the weighing and batching of main and auxiliary materials is done manually. This manual weighing method has several major drawbacks: First, manual operation carries the possibility of weighing errors, thus compromising product quality stability. Second, it involves high labor intensity, high labor costs, and low work efficiency. Third, some small amounts of dust and other fine particles can affect human health, and long-term exposure to this work may lead to occupational diseases such as respiratory illnesses and pneumoconiosis. Furthermore, in compound extrusion production lines, materials with poor flowability present challenges for long-distance transport. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a main material and auxiliary material conveying, weighing and mixing system that integrates main material feeding, auxiliary material feeding, conveying, weighing, mixing and extrusion into a whole production line.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a main material and auxiliary material conveying, weighing and mixing system, comprising: a main material feeding area, an auxiliary material feeding area, a mixing and batching area, a mixing and storage area and an extrusion area; the main material feeding area is provided with a first main material feeding bin, a second main material feeding bin, a first grinding material feeding bin and a second grinding material feeding bin; the auxiliary material feeding area is provided with a first multi-component auxiliary material formulater and a second multi-component auxiliary material formulater;

[0005] The mixing and batching area is provided with a first mixing unit and a second mixing unit; the inlet of the first mixing unit is connected to the outlet of the first main material feeding hopper, the outlet of the second main material feeding hopper, and the outlet of the first multi-component auxiliary material formulater through a first pipeline system; the inlet of the second mixing unit is connected to the outlet of the first grinding material feeding hopper, the outlet of the second grinding material feeding hopper, and the outlet of the second multi-component auxiliary material formulater through a second pipeline system.

[0006] At least two sets of mixing and storage units are provided in the mixing and storage area; several sets of extrusion units are provided in the extrusion area; the outlet of the first mixing unit is connected to the inlet of each set of mixing and storage units and the inlet of each extrusion unit through a third pipeline system; the outlet of the second mixing unit is connected to the inlet of each set of mixing and storage units and the inlet of each extrusion unit through a fourth pipeline system; and the outlet of each set of mixing and storage units is connected to the inlet of each extrusion unit through a fifth pipeline system.

[0007] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing, and mixing system, an auxiliary material reserve area is also provided. The auxiliary material reserve area includes a first auxiliary material reserve feeding bin and a second auxiliary material reserve feeding bin. The inlet of the first mixing unit is connected via a first pipeline system to the outlets of the first main material feeding bin, the second main material feeding bin, the first multi-component auxiliary material formulater, and the first auxiliary material reserve feeding bin. The inlet of the second mixing unit is connected via a second pipeline system to the outlets of the first grinding material feeding bin, the second grinding material feeding bin, the second multi-component auxiliary material formulater, and the second auxiliary material reserve feeding bin.

[0008] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing and mixing system, dust removal devices are respectively installed on the first main material feeding bin, the second main material feeding bin, the first grinding material feeding bin, the second grinding material feeding bin, the first multi-component auxiliary material formulater, the second multi-component auxiliary material formulater, the first auxiliary material spare feeding bin and the second auxiliary material spare feeding bin.

[0009] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing and mixing system, the first mixing unit and the second mixing unit have the same structure, both including: a weighing hopper with an electronic scale for the main material, a liquid stabilizer silo, a liquid stabilizer weighing hopper with an electronic scale, a hot mixer, a cold mixer, a first transition silo and a second transition silo.

[0010] The inlet of the weighing hopper is the inlet of the first mixing unit or the second mixing unit. A first vacuum pump is provided on the weighing hopper to draw the material into the weighing hopper. The outlet of the weighing hopper is connected to the inlet of the hot mixer through a first pipeline.

[0011] The outlet of the liquid stabilizer silo is connected to the inlet of the liquid stabilizer weighing hopper via a second pipeline, and the outlet of the liquid stabilizer weighing hopper is connected to the liquid stabilizer inlet of the hot mixer via a third pipeline.

[0012] The outlet of the hot mixer is connected to the inlet of the cold mixer via a fourth pipeline. The outlet of the cold mixer is connected to the inlet of the first transition silo via a fifth pipeline. The outlet of the first transition silo is connected to the inlet of the second transition silo via a sixth pipeline. The outlet of the second transition silo is the outlet of either the first or the second mixing unit.

[0013] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing, and mixing system, the mixing and storage unit includes: a vacuum hopper, a storage silo, and a suction hopper; the inlet of the vacuum hopper is the inlet of the mixing and storage unit; a second vacuum pump is installed on the vacuum hopper to draw materials into it; the outlet of the vacuum hopper is connected to the inlet of the storage silo via a seventh pipeline; the outlet of the storage silo is connected to the inlet of the suction hopper via an eighth pipeline; and the outlet of the suction hopper is the outlet of the mixing and storage unit.

[0014] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing, and mixing system, the extrusion unit includes: a first vacuum hopper, a second vacuum hopper, a main hopper, and an extruder. A third vacuum pump is installed on the first vacuum hopper and the second vacuum hopper to draw material into the first vacuum hopper and / or the second vacuum hopper. The outlet of the first vacuum hopper is connected to the inlet of the main hopper through a ninth pipeline, the outlet of the second vacuum hopper is connected to the inlet of the main hopper through a tenth pipeline, and the outlet of the main hopper is connected to the inlet of the extruder.

[0015] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing and mixing system, the two or three sets of extrusion units share the same third vacuum pump.

[0016] Furthermore, in the aforementioned main material and auxiliary material conveying, weighing, and mixing system, a first suction hopper is provided at the outlet of the first main material feeding hopper, a second suction hopper is provided at the outlet of the second main material feeding hopper, a third suction hopper is provided at the outlet of the first grinding material feeding hopper, and a seventh hopper is provided at the outlet of the second grinding material feeding hopper; the outlets of the first and second suction hoppers are connected to the inlet of the first mixing unit through a first pipeline system, and the outlets of the third and seventh suction hoppers are connected to the inlet of the second mixing unit through a second pipeline system.

[0017] The beneficial effects of this utility model are: it integrates automatic feeding of main materials, automatic feeding of auxiliary materials, conveying, weighing, mixing and extrusion into a complete production line, which greatly improves production efficiency and reduces production costs; in addition, it solves the problem of materials with poor flowability being difficult to transport over long distances. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the division and labeling of various areas in a main material and auxiliary material conveying, weighing and mixing system according to this utility model.

[0019] Figure 2 This is a schematic diagram of the process of conveying, weighing and mixing main and auxiliary materials according to the present invention.

[0020] Figure 3This is a flowchart illustrating the process of the main ingredient delivery area.

[0021] Figure 4 This is a flowchart illustrating the process of the auxiliary material delivery area.

[0022] Figure 5 This is a flowchart of the first mixing unit.

[0023] Figure 6 This is a flow chart of the mixing and storage unit.

[0024] Figure 7 This is a schematic diagram of a process where two extrusion units share the same third vacuum pump. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," "third," "fourth," and "fifth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The main material and auxiliary material conveying, weighing and mixing system described in this embodiment, such as Figure 1 As shown, it includes: a main material feeding area 100, an auxiliary material feeding area 200, a mixing and batching area 400, a mixing and storage area 500, and an extrusion area 600. Figure 3 As shown, the main material feeding area 100 is equipped with a first main material feeding bin 1, a second main material feeding bin 2, a first grinding material feeding bin 3, and a second grinding material feeding bin 4. During PVC material production, PVC is fed into the first main material feeding bin 1 and the second main material feeding bin 2, while the first grinding material feeding bin 3 and the second grinding material feeding bin 4 contain grinding materials recycled from production waste. Figure 4 As shown, the auxiliary material feeding area 200 is equipped with a first multi-component auxiliary material formulating machine 10 and a second multi-component auxiliary material formulating machine 9. The first multi-component auxiliary material formulating machine 10 and the second multi-component auxiliary material formulating machine 9 are multi-component auxiliary material formulating machines with built-in weighing function available on the market.

[0028] like Figure 2As shown, the mixing and batching area 400 is provided with a first mixing unit 401 and a second mixing unit 402. The inlet of the first mixing unit 401 is connected to the outlet of the first main material feeding bin 1, the outlet of the second main material feeding bin 2, and the outlet of the first multi-component auxiliary material formulater 10 through a first pipeline system; the inlet of the second mixing unit 402 is connected to the outlet of the first grinding material feeding bin 3, the outlet of the second grinding material feeding bin 4, and the outlet of the second multi-component auxiliary material formulater 9 through a second pipeline system.

[0029] In actual production, to ensure preparedness, the main material and auxiliary material conveying, weighing, and mixing system described in this embodiment also includes an auxiliary material reserve area 300, which contains a first auxiliary material reserve feeding bin 29 and a second auxiliary material reserve feeding bin 30; for example... Figure 2 and 5 As shown, the inlet of the first mixing unit 401 is connected via a first pipeline system not only to the outlets of the first main material feeding hopper 1, the second main material feeding hopper 2, and the first multi-component auxiliary material formulater 10, but also to the outlet of the first auxiliary material reserve feeding hopper 29. Similarly, the inlet of the second mixing unit 402 is connected via a second pipeline system not only to the outlets of the first grinding material feeding hopper 3, the second grinding material feeding hopper 4, and the second multi-component auxiliary material formulater 9, but also to the outlet of the second auxiliary material reserve feeding hopper 30. When the types of auxiliary materials required for production exceed the maximum mixing ratio of the multi-component auxiliary material formulater, or when auxiliary materials need to be added from other channels in other situations, they can be added through the first auxiliary material reserve feeding hopper 29 and the second auxiliary material reserve feeding hopper 30.

[0030] To control dust leakage in the auxiliary material feeding area 200, the main material feeding area 100, and the auxiliary material reserve area 300, this embodiment provides dust removal devices 31 for the first main material feeding silo 1, the second main material feeding silo 2, the first grinding material feeding silo 3, the second grinding material feeding silo 4, the first multi-component auxiliary material formulater 10, the second multi-component auxiliary material formulater 9, the first auxiliary material reserve feeding silo 29, and the second auxiliary material reserve feeding silo 30. The dust removal devices 31 can be high-efficiency pulse dust collectors. These devices effectively control dust leakage and ensure that the environmental dust concentration is controlled at 5 mg / m³. 3 Within this area, the work environment is friendly, achieving clean production.

[0031] The first mixing unit 401 and the second mixing unit 402 have the same structure, such as Figure 5As shown, each component includes: a weighing hopper 13 with a main material electronic scale 131, a liquid stabilizer silo 14, a liquid stabilizer weighing hopper 15 with an electronic scale 151, a hot mixer 16, a cold mixer 17, a first transition silo 18, and a second transition silo 19. The inlet of the weighing hopper 13 is the inlet of either the first mixing unit 401 or the second mixing unit 402. A first vacuum pump 12 is installed on the weighing hopper 13 to draw material into it. The outlet of the weighing hopper 13 is connected to the inlet of the hot mixer 16 via a first pipeline. The outlet of the liquid stabilizer silo 14 is connected to the inlet of the liquid stabilizer weighing hopper 15 via a second pipeline, and the outlet of the liquid stabilizer weighing hopper 15 is connected to the liquid stabilizer inlet of the hot mixer 16 via a third pipeline. The outlet of the hot mixer 16 is connected to the inlet of the cold mixer 17 via a fourth pipeline. The outlet of the cold mixer 17 is connected to the inlet of the first transition silo 18 via a fifth pipeline. The outlet of the first transition silo 18 is connected to the inlet of the second transition silo 19 via a sixth pipeline. The outlet of the second transition silo 19 is the outlet of either the first mixing unit 401 or the second mixing unit 402.

[0032] The first pipeline system consists of a first feed pipeline 101, a second feed pipeline 102, a third feed pipeline 103, and a fourth feed pipeline 104. The outlet of the first main material feeding bin 1 is connected to the inlet of the weighing hopper 13 in the first mixing unit 401 through the first feed pipeline 101. The outlet of the second main material feeding bin 2 is connected to the inlet of the weighing hopper 13 in the first mixing unit 401 through the second feed pipeline 102. The outlet of the first multi-component auxiliary material formulater 10 is connected to the inlet of the weighing hopper 13 in the first mixing unit 401 through the third feed pipeline 103. The outlet of the first auxiliary material spare feeding bin 29 is connected to the inlet of the weighing hopper 13 in the first mixing unit 401 through the fourth feed pipeline 104.

[0033] Valves, such as solenoid valves and electric valves, are installed on the first feed pipe 101, the second feed pipe 102, the third feed pipe 103, and the fourth feed pipe 104 to control the flow or obstruction of the pipes. In actual production, when the main material from the first main material feeding bin 1 and the second main material feeding bin 2 needs to enter the weighing hopper 13 in the first mixing unit 401, the valves on the first feed pipe 101 and the second feed pipe 102 are opened to ensure the flow of the pipes. Then, the main material from the first main material feeding bin 1 and the second main material feeding bin 2 is sucked into the weighing hopper 13 in the first mixing unit 401 by the first vacuum pump 12. When the auxiliary materials from the first multi-component auxiliary material formulating machine 10 need to enter the weighing hopper 13 of the first mixing unit 401, the valve on the third feed pipe 103 is opened to ensure unobstructed flow. Then, the auxiliary materials from the first multi-component auxiliary material formulating machine 10 are drawn into the weighing hopper 13 of the first mixing unit 401 by the first vacuum pump 12. When the auxiliary materials from the first auxiliary material reserve feeding bin 29 need to enter the weighing hopper 13 of the first mixing unit 401, the valve on the fourth feed pipe 104 is opened to ensure unobstructed flow. Then, the auxiliary materials from the first auxiliary material reserve feeding bin 29 are drawn into the weighing hopper 13 of the first mixing unit 401 by the first vacuum pump 12.

[0034] Similarly, the second pipeline system consists of a fifth feed pipeline 105, a sixth feed pipeline 106, a seventh feed pipeline 107, and an eighth feed pipeline 108. The outlet of the first grinding material feeding hopper 3 is connected to the inlet of the weighing hopper 13 in the second mixing unit 402 through the seventh feed pipeline 107. The outlet of the second grinding material feeding hopper 4 is connected to the inlet of the weighing hopper 13 in the second mixing unit 402 through the sixth feed pipeline 106. The outlet of the second multi-component auxiliary material formulater 9 is connected to the inlet of the weighing hopper 13 in the second mixing unit 402 through the seventh feed pipeline 107. The outlet of the second auxiliary material spare feeding hopper 30 is connected to the inlet of the weighing hopper 13 in the second mixing unit 402 through the eighth feed pipeline 108.

[0035] Valves, such as solenoid valves and electric valves, are installed on the fifth feed pipe 105, the sixth feed pipe 106, the seventh feed pipe 107, and the eighth feed pipe 108 to control the flow or obstruction of the pipes. In actual production, when the main material from the first grinding powder feeding bin 3 and the second grinding powder feeding bin 4 needs to enter the weighing hopper 13 in the second mixing unit 402, the valves on the fifth feed pipe 105 and the sixth feed pipe 106 are opened to ensure the flow of the pipes. Then, the main material from the first grinding powder feeding bin 3 and the second grinding powder feeding bin 4 is sucked into the weighing hopper 13 in the second mixing unit 402 by the first vacuum pump 12. When the auxiliary materials from the second multi-component auxiliary material formulater 9 need to enter the weighing hopper 13 of the second mixing unit 402, the valve on the seventh feed pipe 107 is opened to ensure unobstructed flow. Then, the auxiliary materials from the second multi-component auxiliary material formulater 9 are drawn into the weighing hopper 13 of the second mixing unit 402 by the first vacuum pump 12. When the auxiliary materials from the second auxiliary material reserve feeding bin 30 need to enter the weighing hopper 13 of the second mixing unit 402, the valve on the eighth feed pipe 108 is opened to ensure unobstructed flow. Then, the auxiliary materials from the second auxiliary material reserve feeding bin 30 are drawn into the weighing hopper 13 of the second mixing unit 402 by the first vacuum pump 12.

[0036] In this embodiment, a first suction hopper 5 is provided at the outlet of the first main material feeding hopper 1, a second suction hopper 6 is provided at the outlet of the second main material feeding hopper 2, a third suction hopper 7 is provided at the outlet of the first grinding material feeding hopper 3, and a seventh hopper 8 is provided at the outlet of the second grinding material feeding hopper 4. Figure 3 As shown, the discharge ports of the first suction hopper 5 and the second suction hopper 6 are connected to the inlet of the first mixing unit 401 via a first pipeline system. The discharge ports of the third suction hopper 7 and the seventh hopper 8 are connected to the inlet of the second mixing unit 402 via a second pipeline system. The first suction hopper 5, the second suction hopper 6, the third suction hopper 7, and the seventh hopper 8 serve as transfer stations for materials with poor flowability during the transport from the auxiliary material feeding area 200, the main material feeding area 100, and the auxiliary material reserve area 300 to the mixing and batching area 400. This solves the problem of transporting materials with poor flowability over long distances.

[0037] It should be noted that the distances between the devices shown in the accompanying diagrams do not represent the actual distances between the devices; the diagrams are merely for illustrating the connection relationships between the devices.

[0038] The mixing and storage area 500 is provided with at least two sets of mixing and storage units 501. The extrusion area 600 is provided with several sets of extrusion units 601. Figure 2The diagram shows a setup of six extrusion units 601, but this is only an illustration. In actual production, the number of extrusion units 601 is arranged according to actual needs.

[0039] The discharge port of the first mixing unit 401 is connected to the inlet of each group of mixing and storage units 501 and the inlet of each group of extrusion units 601 through a third pipeline system. The discharge port of the second mixing unit 402 is connected to the inlet of each group of mixing and storage units 501 and the inlet of each group of extrusion units 601 through a fourth pipeline system. The discharge port of each group of mixing and storage units 501 is connected to the inlet of each group of extrusion units 601 through a fifth pipeline system.

[0040] For mixtures with good flowability, they can usually be directly distributed from the mixing and batching area 400 to each extrusion unit 601. However, when the mixing and batching area 400 and the extrusion area 600 are far apart, for mixtures with poor flowability that are difficult to transport over long distances, the material output from the mixing and batching area 400 is first sucked into each group of mixing and storage units 501, and then distributed to each extrusion unit 601 through each group of mixing and storage units 501. This solves the problem of poorly flowable materials being difficult to transport over long distances.

[0041] like Figure 6 As shown, the mixing and storage unit 501 includes: a vacuum hopper 21, a storage bin 22, and a suction hopper 23; the inlet of the vacuum hopper 21 is the inlet of the mixing and storage unit 501, and a second vacuum pump 20 is provided on the vacuum hopper 21 to suck the material into the vacuum hopper 21; the outlet of the vacuum hopper 21 is connected to the inlet of the storage bin 22 through a seventh pipeline, and the outlet of the storage bin 22 is connected to the inlet of the suction hopper 23 through an eighth pipeline; the outlet of the suction hopper 23 is the outlet of the mixing and storage unit 501.

[0042] like Figure 2 and Figure 7 As shown, the extrusion unit 601 includes: a first vacuum hopper 24, a second vacuum hopper 25, a main hopper 26, and an extruder 27. A third vacuum pump 28 is installed on the first vacuum hopper 24 and the second vacuum hopper 25 to draw material into them. The outlet of the first vacuum hopper 24 is connected to the inlet of the main hopper 26 via a ninth pipe, and the outlet of the second vacuum hopper 25 is connected to the inlet of the main hopper 26 via a tenth pipe. The outlet of the main hopper 26 is connected to the inlet of the extruder 27. In actual use, the two or three sets of extrusion units 601 can share the same third vacuum pump 28.

[0043] The main material and auxiliary material conveying, weighing and mixing system described in this embodiment is also provided with a control area. The centralized control is provided with a PLC controller, and the control mode is fully automatic, semi-automatic or manual. It provides contact signals including: control signals, status signals and coordination control signals for each area, and manages the temperature, pressure and process parameters in the system.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A main material and auxiliary material conveying, weighing and mixing system, comprising: The facility comprises a main material feeding area, an auxiliary material feeding area, a mixing and batching area, a mixing and storage area, and an extrusion area; characterized in that: the main material feeding area is provided with a first main material feeding silo, a second main material feeding silo, a first grinding material feeding silo, and a second grinding material feeding silo; the auxiliary material feeding area is provided with a first multi-component auxiliary material formulating machine and a second multi-component auxiliary material formulating machine; The mixing and batching area is provided with a first mixing unit and a second mixing unit; the inlet of the first mixing unit is connected to the outlet of the first main material feeding hopper, the outlet of the second main material feeding hopper, and the outlet of the first multi-component auxiliary material formulater through a first pipeline system; the inlet of the second mixing unit is connected to the outlet of the first grinding material feeding hopper, the outlet of the second grinding material feeding hopper, and the outlet of the second multi-component auxiliary material formulater through a second pipeline system. At least two sets of mixing and storage units are provided in the mixing and storage area; several sets of extrusion units are provided in the extrusion area; the outlet of the first mixing unit is connected to the inlet of each set of mixing and storage units and the inlet of each extrusion unit through a third pipeline system; the outlet of the second mixing unit is connected to the inlet of each set of mixing and storage units and the inlet of each extrusion unit through a fourth pipeline system; and the outlet of each set of mixing and storage units is connected to the inlet of each extrusion unit through a fifth pipeline system.

2. The main material and auxiliary material conveying, weighing and mixing system according to claim 1, characterized in that: An auxiliary material reserve area is also provided, which includes a first auxiliary material reserve feeding bin and a second auxiliary material reserve feeding bin. The inlet of the first mixing unit is connected to the outlet of the first main material feeding bin, the outlet of the second main material feeding bin, the outlet of the first multi-component auxiliary material formulater, and the outlet of the first auxiliary material reserve feeding bin via a first pipeline system. The inlet of the second mixing unit is connected to the outlet of the first grinding material feeding bin, the outlet of the second grinding material feeding bin, the outlet of the second multi-component auxiliary material formulater, and the outlet of the second auxiliary material reserve feeding bin via a second pipeline system.

3. The main material and auxiliary material conveying, weighing and mixing system according to claim 2, characterized in that: Dust removal devices are respectively installed on the first main material feeding bin, the second main material feeding bin, the first grinding material feeding bin, the second grinding material feeding bin, the first multi-component auxiliary material formulating machine, the second multi-component auxiliary material formulating machine, the first auxiliary material spare feeding bin, and the second auxiliary material spare feeding bin.

4. A main material and auxiliary material conveying, weighing, and mixing system according to claim 1, 2, or 3, characterized in that: The first mixing unit and the second mixing unit have the same structure, both including: a weighing hopper with an electronic scale for the main material, a liquid stabilizer silo, a liquid stabilizer weighing hopper with an electronic scale, a hot mixer, a cold mixer, a first transition silo, and a second transition silo; The inlet of the weighing hopper is the inlet of the first mixing unit or the second mixing unit. A first vacuum pump is provided on the weighing hopper to draw the material into the weighing hopper. The outlet of the weighing hopper is connected to the inlet of the hot mixer through a first pipeline. The outlet of the liquid stabilizer silo is connected to the inlet of the liquid stabilizer weighing hopper via a second pipeline, and the outlet of the liquid stabilizer weighing hopper is connected to the liquid stabilizer inlet of the hot mixer via a third pipeline. The outlet of the hot mixer is connected to the inlet of the cold mixer via a fourth pipeline. The outlet of the cold mixer is connected to the inlet of the first transition silo via a fifth pipeline. The outlet of the first transition silo is connected to the inlet of the second transition silo via a sixth pipeline. The outlet of the second transition silo is the outlet of either the first or the second mixing unit.

5. The main material and auxiliary material conveying, weighing and mixing system according to claim 1, characterized in that: The mixing and storage unit includes a vacuum hopper, a storage bin, and a suction hopper. The inlet of the vacuum hopper is the inlet of the mixing and storage unit. A second vacuum pump is installed on the vacuum hopper to draw materials into it. The outlet of the vacuum hopper is connected to the inlet of the storage bin via a seventh pipeline. The outlet of the storage bin is connected to the inlet of the suction hopper via an eighth pipeline. The outlet of the suction hopper is the outlet of the mixing and storage unit.

6. The main material and auxiliary material conveying, weighing and mixing system according to claim 1, characterized in that: The extrusion unit includes: a first vacuum hopper, a second vacuum hopper, a main hopper, and an extruder. A third vacuum pump is installed on the first vacuum hopper and the second vacuum hopper to draw material into the first vacuum hopper and / or the second vacuum hopper. The discharge port of the first vacuum hopper is connected to the feed port of the main hopper through a ninth pipeline. The discharge port of the second vacuum hopper is connected to the feed port of the main hopper through a tenth pipeline. The discharge port of the main hopper is connected to the feed port of the extruder.

7. The main material and auxiliary material conveying, weighing and mixing system according to claim 6, characterized in that: The two or three sets of extrusion units share the same third vacuum pump.

8. The main material and auxiliary material conveying, weighing and mixing system according to claim 1, characterized in that: A first suction hopper is provided at the discharge port of the first main material feeding hopper, a second suction hopper is provided at the discharge port of the second main material feeding hopper, a third suction hopper is provided at the discharge port of the first grinding material feeding hopper, and a seventh hopper is provided at the discharge port of the second grinding material feeding hopper; the discharge ports of the first and second suction hoppers are connected to the inlet of the first mixing unit through a first pipeline system, and the discharge ports of the third and seventh hoppers are connected to the inlet of the second mixing unit through a second pipeline system.

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