Plastic wood product production system device

Abstract

The utility model discloses a plastic wood product production system device which comprises a main material storage and conveying area, an auxiliary material feeding and weighing area and at least one mixed material conveying, extruding and feeding area. A CaCO3 main material storage and conveying unit, a CaCO3 transition unit, two groups of PVC main material storage and conveying units and a wood powder main material storage and conveying unit are arranged in the main material storage and conveying area; a group of auxiliary material pouring bin dedusting and weighing units are arranged in the auxiliary material feeding and weighing area; a mixing unit, a mixture conveying unit and a mixture storage and extrusion feeding unit are arranged in the mixture conveying, extruding and feeding area. The device has the advantages of being efficient in operation, high in weighing precision, good in mixing effect, remarkable in energy conservation, environmentally friendly, high in automation degree and the like.

Description

Technical Field

[0001] This utility model relates to the field of composite material production technology, and in particular to a system device for producing wood-plastic composite products. Background Technology

[0002] Wood-plastic composites (WPC) are a new type of composite material that has emerged rapidly in recent years both domestically and internationally. They have fire-resistant properties, with a fire rating of A1 (non-combustible building materials), are truly formaldehyde-free and environmentally friendly, and possess high performance characteristics such as waterproof and moisture-resistant properties, air purification, humidity regulation, sound insulation, heat insulation, antibacterial and mildew prevention. They also combine the properties and characteristics of wood and plastic, and can replace wood and plastic.

[0003] WPC wall and flooring, made from WPC material, can replace other types of wall and flooring products due to the excellent properties of WPC. Compared with other wall and flooring materials, WPC wall and flooring is superior in both price and performance, and has a broad market prospect.

[0004] There is an urgent need for a wood-plastic composite product production system that is highly efficient, has high weighing accuracy, good mixing effect, significant energy saving, is environmentally friendly, and has a high degree of automation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plastic wood product production system device, which has the advantages of high efficiency, high weighing accuracy, good mixing effect, significant energy saving, green environmental protection and high degree of automation.

[0006] This utility model adopts a multidisciplinary research method and technical means to analyze, design and study the raw material conveying, metering and weighing, mixing and blending, high-efficiency dust removal and intelligent system control, and designs a plastic wood product production system device.

[0007] The technical solution adopted by this utility model is as follows: a plastic wood product production system device, comprising: a main material storage and conveying area, an auxiliary material feeding and weighing area, and at least one mixing, conveying, and extrusion feeding area; characterized in that: the main material storage and conveying area is provided with a CaCO3 main material storage and conveying unit, a CaCO3 transition unit, two sets of PVC main material storage and conveying units, and a wood flour main material storage and conveying unit; the auxiliary material feeding and weighing area is provided with an auxiliary material unloading hopper dust removal and weighing unit; the mixing, conveying, and extrusion feeding area is provided with a mixing unit, a mixed material conveying unit, and a mixed material storage and extrusion feeding unit;

[0008] The outlet of the CaCO3 main material storage and conveying unit is connected to the inlet of the CaCO3 transition unit via a first conveying pipeline. The outlet of the CaCO3 transition unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a second conveying pipeline. The outlet of each group of PVC main material storage and conveying units is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a third conveying pipeline. The outlet of the wood flour main material storage and conveying unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a fourth conveying pipeline.

[0009] The auxiliary material unloading hopper dust removal and weighing unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding area through the fifth conveying pipeline; a first pneumatic ball valve is installed on the fifth conveying pipeline;

[0010] The discharge port of the mixing unit is connected to the inlet of the mixing conveying unit through the sixth conveying pipeline, and the discharge port of the mixing conveying unit is connected to the inlet of the mixing storage and extrusion feeding unit through the seventh conveying pipeline.

[0011] Furthermore, in the aforementioned plastic wood product production system device, the structure of the CaCO3 main material storage and conveying unit is as follows: it includes a CaCO3 silo, a first pulse dust collector installed on the top of the CaCO3 silo, and a first vibrating unloader installed at the discharge port at the bottom of the CaCO3 silo. The discharge port at the bottom of the first vibrating unloader is connected to the inlet of a first pneumatic butterfly valve through a first pipe. The outlet of the first pneumatic butterfly valve is connected to the inlet of a pressure conveying tank device through a second pipe. The discharge port of the pressure conveying tank device is connected to the inlet of the CaCO3 transition unit through a first conveying pipeline.

[0012] The structure of the CaCO3 transition unit includes: a CaCO3 transition hopper, a second pulse dust collector installed at the top of the CaCO3 transition hopper, and a second vibrating unloader installed at the discharge port at the bottom of the CaCO3 transition hopper. The inlet of the CaCO3 transition hopper is the inlet of the CaCO3 transition unit. The discharge port at the bottom of the second vibrating unloader is connected to the inlet of a first manual butterfly valve via a third pipe. The outlet of the first manual butterfly valve is connected to two first branch pipes, and a first rotary valve is installed on each first branch pipe. Each first rotary valve corresponds to a mixing, conveying, extrusion, and feeding area. The second conveying pipe is composed of two second branch pipes. The outlet of each first rotary valve is connected to the inlet of the mixing unit in the corresponding mixing, conveying, extrusion, and feeding area via a second branch pipe. A second pneumatic ball valve is installed on each second branch pipe.

[0013] The structure of each PVC main material storage and conveying unit is as follows: it includes a PVC silo, a third pulse dust collector installed on the top of the PVC silo, the discharge port at the bottom of the PVC silo is connected to the inlet of the second manual butterfly valve through a fourth pipe, and the outlet of the second manual butterfly valve is connected to the inlet of the first suction hopper through a fifth pipe; the third conveying pipeline consists of two third branch pipes, the outlet of the first suction hopper is connected to the two third branch pipes respectively, each third branch pipe corresponds to a mixing conveying extrusion feeding area, and each third branch pipe is connected to the inlet of the mixing unit in the corresponding mixing conveying extrusion feeding area; a third pneumatic ball valve is provided at the inlet end of each third branch pipe, a first air intake regulating valve and a first pneumatic cleaning valve are connected to each third branch pipe, and a fourth pneumatic ball valve is provided at the outlet of each third branch pipe;

[0014] The structure of the wood flour main material storage and conveying unit is as follows: it includes a wood flour silo, a fourth pulse dust collector installed on the top of the wood flour silo, and a third vibrating unloader installed at the discharge port at the bottom of the wood flour silo. The discharge port at the bottom of the third vibrating unloader is connected to the inlet of a third manual butterfly valve through a sixth pipe. The outlet of the third manual butterfly valve is connected to the inlet of a second suction hopper through a seventh pipe. The fourth conveying pipeline consists of two fourth branch pipes. The outlet of the second suction hopper is connected to the two fourth branch pipes respectively. Each fourth branch pipe corresponds to a mixing conveying extrusion feeding area. Each fourth branch pipe is connected to the inlet of the mixing unit in the corresponding mixing conveying extrusion feeding area. A fifth pneumatic ball valve is provided at the inlet end of each fourth branch pipe. A second air intake regulating valve and a second pneumatic cleaning valve are connected to each fourth branch pipe. A sixth pneumatic ball valve is provided at the outlet of each fourth branch pipe.

[0015] The structure of the auxiliary material feeding hopper dust removal and weighing unit is as follows: it includes several auxiliary material feeding hoppers, each with a central dust collector at the top, a screw metering feeder connected to the bottom outlet of each auxiliary material feeding hopper, and the outlet of each screw metering feeder connected to the inlet of the auxiliary material electronic weighing hopper via a corresponding first auxiliary material feeding pipe. A first auxiliary material pneumatic butterfly valve is installed on each first auxiliary material feeding pipe. The outlet at the bottom of the auxiliary material electronic weighing hopper is connected to the electronic scale transition hopper via a second auxiliary material feeding pipe, and a second auxiliary material pneumatic butterfly valve is installed on the second auxiliary material feeding pipe. The outlet at the bottom of the electronic scale transition hopper is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a fifth conveying pipeline.

[0016] Furthermore, in the aforementioned plastic wood product production system device, the CaCO3 silo, PVC silo, and wood powder silo are supplied by manual feeding or by canned truck feeding.

[0017] Furthermore, in the aforementioned plastic wood product production system device, the manual feeding method adopts a manual feeding device; when the manual feeding device is adopted, the PVC silos in the two sets of PVC main material storage and conveying units share one manual feeding device;

[0018] The structure of the manual feeding equipment includes: a manual feeding hopper, a fifth pulse dust collector installed on the top of the manual feeding hopper, the discharge port at the bottom of the manual feeding hopper being connected to the inlet of a second rotary valve through a first feeding pipe, the outlet of the second rotary valve being connected to an air duct through a second feeding pipe, one end of the air duct being connected to the feeding port of a CaCO3 silo, a PVC silo, or a wood powder silo, and the other end of the air duct being connected to a Roots blower;

[0019] The wood-plastic composite production system also includes a centralized control area, where a control system controls the operation of the manual feeding equipment. The manual feeding process is as follows: a bag containing CaCO3, PVC, or wood powder is placed into the corresponding manual hopper. The control system starts the Roots blower for a set time 'a' minutes, then starts the second rotary valve. The CaCO3, PVC, or wood powder output from the outlet of the second rotary valve is conveyed by the Roots blower under positive pressure into the corresponding CaCO3 silo, PVC silo, or wood powder silo. Simultaneously with the start of the second rotary valve, the control system starts the fifth pulse dust collector. After feeding is completed, the control system first closes the second rotary valve. The Roots blower shuts down after a set delay of 'b' minutes after the second rotary valve closes, and the fifth pulse dust collector shuts down after a set delay of 'c' minutes after the Roots blower shuts down.

[0020] Furthermore, in the aforementioned plastic wood product production system device, the structure of the mixing unit is as follows: it includes a weighing hopper with an electronic scale and a sixth pulse dust collector installed on the top of the weighing hopper. The inlet of the weighing hopper is the inlet of the mixing unit in the mixing conveying extrusion feeding area. A first Roots vacuum pump is installed on the weighing hopper to draw materials from the CaCO3 transition unit, the PVC main material storage and conveying unit, and the wood powder main material storage and conveying unit into the weighing hopper. The outlet at the bottom of the weighing hopper is connected to the inlet of a second pneumatic butterfly valve through an eighth pipe. The outlet of the second pneumatic butterfly valve is connected to the inlet of a high-speed mixer through a ninth pipe. The outlet of the high-speed mixer is connected to the inlet of a cooling mixer through a tenth pipe. The outlet of the cooling mixer is connected to the inlet of a third pneumatic butterfly valve through an eleventh pipe. The outlet of the third pneumatic butterfly valve is connected to the inlet of the mixing conveying unit through a sixth conveying pipeline.

[0021] The structure of the mixture conveying unit is as follows: it includes a transition hopper, the inlet of which is the inlet of the mixture conveying unit; the outlet at the bottom of the transition hopper is connected to the inlet of the first screw feeder, the outlet of the first screw feeder is connected to the inlet of the transition hopper, the outlet at the bottom of the transition hopper is connected in sequence to the fourth manual butterfly valve, the third rotary valve, and the inlet of the scraper conveyor through the twelfth pipe, and the outlet of the scraper conveyor is connected to the inlet of the mixture storage and extrusion feeding unit through the seventh conveying pipeline;

[0022] The structure of the mixture storage and extrusion feeding unit is as follows: it includes a dry mixture silo, the inlet of which is the inlet of the mixture storage and extrusion feeding unit; the bottom outlet of the dry mixture silo is connected in sequence to the inlet of the fifth manual butterfly valve, the fourth rotary valve, and the second screw feeder via the thirteenth pipe; the outlet of the second screw feeder is connected to several fifth branch pipes, each fifth branch pipe is connected to an extruder, and a fourth pneumatic butterfly valve is installed on the fifth branch pipe.

[0023] Furthermore, in the aforementioned plastic wood product production system device, a manual feeding port is provided on the high-speed mixer, the discharge port at the bottom of the manual feeding hopper is connected to the inlet of the sixth manual butterfly valve through the fourteenth pipe, and the outlet of the sixth manual butterfly valve is connected to the manual feeding port through the fifteenth pipe.

[0024] Furthermore, in the aforementioned plastic wood product production system device, an overflow recovery unit is also provided in the mixed material storage and extrusion feeding unit; the structure of the overflow recovery unit includes: an overflow hopper, the overflow port of the second screw feeder is connected to the inlet of the overflow hopper through a first overflow pipe, the outlet of the overflow hopper is connected to the inlet of a fifth pneumatic butterfly valve through a second overflow pipe, the outlet of the fifth pneumatic butterfly valve is connected to the inlet of a vacuum suction hopper through a third overflow pipe, a replenishing air valve and a third pneumatic cleaning valve are connected to the third overflow pipe, the outlet of the vacuum suction hopper is connected to the inlet of a sixth pneumatic butterfly valve through a fourth overflow pipe; an overflow recovery port is provided on the dry mixed material silo, the outlet of the sixth pneumatic butterfly valve is connected to the overflow recovery port of the dry mixed material silo through a fifth overflow pipe, and a second Roots vacuum pump is provided on the vacuum suction hopper to suck the overflow into the vacuum suction hopper.

[0025] Furthermore, the aforementioned plastic wood product production system device further includes: a centralized control area, wherein a control system is provided in the central control area, the control system including a PLC control and computer monitoring system, the control system controls the automatic valves and automatic electrical equipment of each component in the plastic wood product production system device, and displays the control results on the display screen of the PLC control and computer monitoring system;

[0026] The CaCO3 main material batching control process is as follows: The control system starts the pressure conveying tank device, the first pulse dust collector, and the first vibrating unloader, opens the first pneumatic butterfly valve, and vibrates and unloads the CaCO3 output from the outlet of the first pneumatic butterfly valve through the pressure conveying tank device into the CaCO3 transition hopper; The control system starts the first Roots vacuum pump in any mixing, conveying, extrusion feeding area, manually opens the first manual butterfly valve, starts the second vibrating unloader, and starts the first rotary valve to rotate at conveying speed A. The CaCO3 in the CaCO3 transition hopper passes through the first rotary valve and enters the weighing hopper in the corresponding mixing, conveying, extrusion feeding area under the suction of the first Roots vacuum pump; When the electronic scale displays a value close to the CaCO3 weight, the control system causes the first rotary valve to rotate at conveying speed B, where conveying speed A is greater than conveying speed B. When the electronic scale displays the CaCO3 weight target value, the control system closes the first rotary valve and the first Roots vacuum pump;

[0027] The PVC main material batching control process is as follows: First, the control system starts the first pneumatic cleaning valve to clean the material in the pipeline and suck out all the material in the pipeline; then, the control system starts the first Roots vacuum pump in any mixing, conveying, extrusion feeding area, manually opens the second manual butterfly valve, and the control system starts the third and fourth pneumatic ball valves. Under the suction of the first Roots vacuum pump, the PVC in the PVC hopper first enters the first suction hopper, and then enters the weighing hopper in the corresponding mixing, conveying, extrusion feeding area.

[0028] The main material batching control process for wood flour is as follows: First, the control system starts the second pneumatic cleaning valve to clean the material in the pipeline, sucking out all the material in the pipeline; then, the control system starts the first Roots vacuum pump in any mixing, conveying, extrusion feeding area, manually opens the third manual butterfly valve, and the control system starts the third vibrating unloader, the fifth pneumatic ball valve, and the sixth pneumatic ball valve. Under the suction of the first Roots vacuum pump, the wood flour in the wood flour silo first enters the second suction hopper, and then enters the weighing hopper in the corresponding mixing, conveying, extrusion feeding area.

[0029] Furthermore, in the aforementioned plastic wood product production system device, a first rotary paddle level gauge and a second rotary paddle level gauge are installed on the CaCO3 silo in the upper limit region of the CaCO3 silo. The first rotary paddle level gauge is located at the high point of the upper limit region of the CaCO3 silo, and the second rotary paddle level gauge is located at the low point of the upper limit region of the CaCO3 silo.

[0030] A third rotary paddle level gauge and a fourth rotary paddle level gauge are installed on the CaCO3 silo in the lower limit area of ​​the CaCO3 silo. The third rotary paddle level gauge is located at the high point of the lower limit area of ​​the CaCO3 silo, and the fourth rotary paddle level gauge is located at the low point of the lower limit area of ​​the CaCO3 silo.

[0031] A fifth rotary paddle level gauge is installed on the CaCO3 transition hopper at the upper limit position of the CaCO3 transition hopper, and a sixth rotary paddle level gauge is installed on the CaCO3 transition hopper at the lower limit position of the CaCO3 transition hopper.

[0032] Each PVC silo is equipped with a seventh and an eighth rotary level gauge located in the upper limit area of ​​the PVC silo, and a ninth and a tenth rotary level gauge located in the lower limit area of ​​the PVC silo. The ninth rotary level gauge is located at the high point of the upper limit area of ​​the PVC silo, and the tenth rotary level gauge is located at the low point of the upper limit area of ​​the PVC silo.

[0033] An eleventh rotary level gauge is installed on the wood powder silo at the upper limit position, a twelfth rotary level gauge is installed on the wood powder silo at the middle position, and a thirteenth rotary level gauge is installed on the wood powder silo at the lower limit position.

[0034] The signal lines of the thirteen rotary level gauges (first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, and thirteenth) are all connected to the control system. These thirteen rotary level gauges can feed back signals to the control system, which then processes the signals.

[0035] During the process of adding material to the CaCO3 silo, when the material in the CaCO3 silo reaches the second rotary paddle level gauge, the control system controls the alarm light to flash and displays the first warning that the CaCO3 silo is full on the display screen; when the material in the CaCO3 silo reaches the first rotary paddle level gauge, the control system controls the alarm light to flash and displays the second warning that the CaCO3 silo is full on the display screen.

[0036] During the process of conveying CaCO3 from the CaCO3 silo to the CaCO3 transition hopper, when the material in the CaCO3 silo reaches the third rotary paddle level gauge, the control system controls the alarm light to flash and displays the first warning of low material in the CaCO3 silo on the display screen; when the material in the CaCO3 silo reaches the fourth rotary paddle level gauge, the control system controls the alarm light to flash and displays the second warning of low material in the CaCO3 silo on the display screen.

[0037] During the process of conveying CaCO3 from the CaCO3 silo to the CaCO3 transition hopper, when the material in the CaCO3 transition hopper reaches the fifth rotary paddle level gauge, the control system controls the alarm light to flash and displays a full CaCO3 transition hopper reminder on the display screen.

[0038] During the process of conveying CaCO3 from the CaCO3 transition hopper to the weighing hopper, when the material in the CaCO3 transition hopper reaches the sixth rotary level gauge, the control system controls the alarm light to flash and displays a reminder that the CaCO3 transition hopper is low on material on the display screen.

[0039] During the process of adding material to the PVC silo, when the material in the PVC silo reaches the eighth rotary paddle level gauge, the control system controls the alarm light to flash and displays the first reminder that the PVC silo is full on the display screen; when the material in the PVC silo reaches the seventh rotary paddle level gauge, the control system controls the alarm light to flash and displays the second reminder that the PVC silo is full on the display screen.

[0040] During the process of conveying PVC from the PVC silo to the weighing hopper, when the material in the PVC silo reaches the ninth rotary paddle level gauge, the control system controls the alarm light to flash and displays the first reminder of PVC silo material shortage on the display screen; when the material in the PVC silo reaches the tenth rotary paddle level gauge, the control system controls the alarm light to flash and displays the second reminder of PVC silo material shortage on the display screen.

[0041] During the process of adding material to the wood powder silo, when the material in the silo reaches the eleventh rotary level gauge, the control system controls the alarm light to flash and displays a full silo warning on the screen; when the material in the silo reaches the twelfth rotary level gauge, the control system controls the alarm light to flash and displays a half-filled silo warning on the screen; when the material in the silo reaches the thirteenth rotary level gauge, the control system controls the alarm light to flash and displays a low material warning on the screen.

[0042] The beneficial effects of this utility model are: ① The device has the advantages of high efficiency, high weighing accuracy, good mixing effect, significant energy saving, green environmental protection, and high degree of automation; ② In the process of conveying CaCO3 from the CaCO3 main material storage and conveying unit to the mixing unit, by adding a CaCO3 transition unit and supplementing it with vibration unloading and positive pressure conveying by the pressure conveying tank device, the problem of poor fluidity and difficulty in long-distance conveying of CaCO3 is solved; ③ The setting of the first pulse dust collector, the second pulse dust collector, the third pulse dust collector, the fourth pulse dust collector, the fifth pulse dust collector, the sixth pulse dust collector, and the seventh pulse dust collector, as well as the setting of pulse dust collectors on the high-speed mixer, the cooling mixer, and the transition material box, effectively controls the dust leakage during the operation of each unit in the device, ensuring that the environmental dust concentration is controlled at 5mg / m³. 3 Within this range, the working environment is friendly, achieving clean production; ④ The setting of the first rotary valve, the second rotary valve, the third rotary valve, and the fourth rotary valve can achieve uniform unloading of the corresponding units and prevent clogging problems. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the process of a wood-plastic composite product production system according to the present invention.

[0044] Figure 2 yes Figure 1 A partial flow diagram of the main material storage and transportation area.

[0045] Figure 3 yes Figure 2 A partial flow diagram of the CaCO3 main material storage and conveying unit.

[0046] Figure 4 yes Figure 2 A partial flow diagram of the CaCO3 transition unit.

[0047] Figure 5 This is a partial flow diagram of two sets of PVC main material storage and conveying units.

[0048] Figure 6 yes Figure 5 A partially enlarged schematic diagram of any one of the PVC main material storage and conveying units.

[0049] Figure 7 yes Figure 2 A partial flow diagram of the main raw material storage and conveying unit for wood flour.

[0050] Figure 8 This is a partial process diagram of two mixing, conveying, extrusion, and feeding areas.

[0051] Figure 9 yes Figure 8A partially enlarged schematic diagram of any mixing, conveying, extrusion, and feeding area.

[0052] Figure 10 yes Figure 9 A partial flow diagram of the intermediate mixing unit.

[0053] Figure 11 yes Figure 9 A partial flow diagram of the medium-mixed material conveying unit.

[0054] Figure 12 yes Figure 9 A partial flow diagram of the mixed feed storage and extrusion feeding unit.

[0055] Figure 13 yes Figure 1 A partial flow diagram of the dust removal and weighing unit in the auxiliary material unloading silo. Detailed Implementation

[0056] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0057] 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.

[0058] The wood-plastic composite production system described in this embodiment has advantages such as high efficiency, high weighing accuracy, good mixing effect, significant energy saving, green environmental protection, and high degree of automation. Its structure is as follows: Figure 1 As shown, it includes: a main material storage and conveying area 100, an auxiliary material feeding and weighing area 200, and at least one mixing, conveying, extrusion, and feeding area 300. Among them, as... Figure 2 As shown, the main material storage and conveying area 100 is equipped with a CaCO3 main material storage and conveying unit 10, a CaCO3 transition unit 40, two sets of PVC main material storage and conveying units 20, and a wood flour main material storage and conveying unit 30. Among them, as... Figure 1 As shown, the auxiliary material feeding and weighing area 200 is equipped with an auxiliary material unloading hopper dust removal and weighing unit. Among them, as... Figure 8 As shown, the mixing, conveying, extrusion, and feeding area 300 is equipped with a mixing unit 50, a mixed material conveying unit 60, and a mixed material storage and extrusion feeding unit 70.

[0059] The outlet of the CaCO3 main material storage and conveying unit 10 is connected to the inlet of the CaCO3 transition unit 40 through the first conveying pipeline 101. The outlet of the CaCO3 transition unit 40 is connected to the inlet of the mixing unit 50 in each group of mixing conveying extrusion feeding area 300 through the second conveying pipeline. The outlet of each group of PVC main material storage and conveying unit 20 is connected to the inlet of the mixing unit 50 in each group of mixing conveying extrusion feeding area 300 through the third conveying pipeline 103. The outlet of the wood flour main material storage and conveying unit 30 is connected to the inlet of the mixing unit 50 in each group of mixing conveying extrusion feeding area 300 through the fourth conveying pipeline 104.

[0060] The auxiliary material unloading hopper dust removal and weighing unit is connected to the inlet of the mixing unit 50 in each group of mixing conveying extrusion feeding area 300 through the fifth conveying pipeline 105; a first pneumatic ball valve 401 is provided on the fifth conveying pipeline 105.

[0061] The discharge port of the mixing unit 50 is connected to the inlet of the mixing material conveying unit 60 through the sixth conveying pipeline 106, and the discharge port of the mixing material conveying unit 60 is connected to the inlet of the mixing material storage and extrusion feeding unit 70 through the seventh conveying pipeline 107.

[0062] like Figure 3 As shown, the structure of the CaCO3 main material storage and conveying unit 10 in this embodiment is as follows: it includes a CaCO3 silo 11, a first pulse dust collector 12 installed on the top of the CaCO3 silo 11, and a first vibrating unloader 13 installed at the discharge port at the bottom of the CaCO3 silo 11. The discharge port at the bottom of the first vibrating unloader 13 is connected to the inlet of a first pneumatic butterfly valve 14 through a first pipe 201. The outlet of the first pneumatic butterfly valve 14 is connected to the inlet of a pressure conveying tank device 15 through a second pipe 202. The discharge port of the pressure conveying tank device 15 is connected to the inlet of the CaCO3 transition unit 40 through a first conveying pipeline 101. The pressure conveying tank device 15 is a mature technology and will not be described in detail here.

[0063] like Figure 4As shown, the structure of the CaCO3 transition unit 40 in this embodiment is as follows: it includes a CaCO3 transition hopper 21, a second pulse dust collector 22 installed on the top of the CaCO3 transition hopper 21, and a second vibrating unloader 23 installed at the discharge port at the bottom of the CaCO3 transition hopper 21. The inlet of the CaCO3 transition hopper 21 is the inlet of the CaCO3 transition unit 40. The discharge port at the bottom of the second vibrating unloader 23 is connected to the inlet of the first manual butterfly valve 24 through a third pipe 203. The outlet of 24 is connected to two first branch pipes 301 respectively. A first rotary valve 25 is installed on each first branch pipe 301. Each first rotary valve 25 corresponds to a mixing conveying extrusion feeding area 300. The second conveying pipe is composed of two second branch pipes 302. The outlet of each first rotary valve 25 is connected to the inlet of the mixing unit 50 in the corresponding mixing conveying extrusion feeding area 300 through a second branch pipe 302. A second pneumatic ball valve 402 is provided on each second branch pipe 302.

[0064] In the process of conveying CaCO3 from the CaCO3 main material storage and conveying unit 10 to the mixing unit 50, the problem of poor fluidity and difficulty in long-distance conveying of CaCO3 is solved by adding a CaCO3 transition unit 40 and supplementing it with vibration unloading and positive pressure conveying by the pressure conveying tank device 15.

[0065] like Figure 6 As shown, the structure of each PVC main material storage and conveying unit 20 in this embodiment is as follows: it includes a PVC silo 31, a third pulse dust collector 32 installed on the top of the PVC silo 31, the discharge port at the bottom of the PVC silo 31 is connected to the inlet of the second manual butterfly valve 33 through a fourth pipe 204, and the outlet of the second manual butterfly valve 33 is connected to the inlet of the first suction hopper 34 through a fifth pipe 205; the third conveying pipeline 103 is composed of two third branch pipes 303, and the outlet of the first suction hopper 34 is respectively connected to... Two third branch pipes 303 are connected, each third branch pipe 303 corresponds to a mixing conveying extrusion feeding area 300, and each third branch pipe 303 is connected to the inlet of the mixing unit 50 in the corresponding mixing conveying extrusion feeding area 300; a third pneumatic ball valve 403 is provided at the inlet end of each third branch pipe 303, a first air intake regulating valve 35 and a first pneumatic cleaning valve 36 are connected to each third branch pipe 303, and a fourth pneumatic ball valve 404 is provided at the outlet of each third branch pipe 303.

[0066] like Figure 7As shown, the structure of the wood flour main material storage and conveying unit 30 in this embodiment is as follows: it includes a wood flour silo 41, a fourth pulse dust collector 42 installed on the top of the wood flour silo 41, and a third vibrating unloader 43 installed at the discharge port at the bottom of the wood flour silo 41. The discharge port at the bottom of the third vibrating unloader 43 is connected to the inlet of a third manual butterfly valve 44 through a sixth pipe 206. The outlet of the third manual butterfly valve 44 is connected to the inlet of a second suction hopper 45 through a seventh pipe 207. The fourth conveying pipeline 104 consists of two fourth branch pipes 304. The second suction hopper 45... The outlet is connected to two fourth branch pipes 304 respectively. Each fourth branch pipe 304 corresponds to a mixing conveying extrusion feeding area 300. Each fourth branch pipe 304 is connected to the inlet of the mixing unit 50 in the corresponding mixing conveying extrusion feeding area 300. A fifth pneumatic ball valve 405 is provided at the inlet end of each fourth branch pipe 304. A second air intake regulating valve 46 and a second pneumatic cleaning valve 47 are connected to each fourth branch pipe 304. A sixth pneumatic ball valve 406 is provided at the outlet of each fourth branch pipe 304.

[0067] The CaCO3 silo 11, PVC silo 31, and wood powder silo 41 are supplied by manual feeding or by being pumped in by a tanker truck 400. Manual feeding utilizes a manual feeding device. When using a manual feeding device, the PVC silos 31 in the two main PVC material storage and conveying units 20 share a single manual feeding device.

[0068] like Figure 5 As shown, the structure of the manual feeding equipment in this embodiment includes: a manual feeding hopper 91, a fifth pulse dust collector 92 installed on the top of the manual feeding hopper 91, the discharge port at the bottom of the manual feeding hopper 91 being connected to the inlet of a second rotary valve 93 through a first feeding pipe 901, the outlet of the second rotary valve 93 being connected to an air duct 903 through a second feeding pipe 902, one end of the air duct 903 being connected to the feeding port of a CaCO3 silo 11, a PVC silo 31, or a wood powder silo 41, and the other end of the air duct 903 being connected to a Roots blower 94.

[0069] The aforementioned plastic wood product production system also includes: a centralized control area 400, which is equipped with a PLC control and computer monitoring system. For ease of description, the PLC control and computer monitoring system is referred to as the control system. The control system controls the operation of the manual feeding equipment. The manual feeding process is as follows: a space bag containing CaCO3, PVC, or wood powder is put into the corresponding manual feeding hopper 91. The control system controls the Roots blower 94 to start for a set time a minutes. Then, the control system controls the second rotary valve 93 to start working. The CaCO3, PVC, or wood powder output from the outlet of the second rotary valve 93 is conveyed by the Roots blower 94 under positive pressure into the corresponding CaCO3 silo 11, PVC silo 31, or wood powder silo 41. Simultaneously with the activation of the second rotary valve 93, the control system activates the fifth pulse dust collector 92. After feeding is complete, the control system first closes the second rotary valve 93. The Roots blower 94 then shuts down after a set delay of b minutes following the closure of the second rotary valve 93. The fifth pulse dust collector 92 shuts down after a set delay of c minutes following the closure of the Roots blower 94. The specific values ​​for a, b, and c are set according to actual design requirements.

[0070] like Figure 13 As shown, the structure of the auxiliary material feeding hopper dust removal and weighing unit in this embodiment is as follows: it includes several auxiliary material feeding hoppers 601, a central dust collector 602 is provided at the top of each auxiliary material feeding hopper 601, and a corresponding screw metering feeder 603 is connected to the discharge port at the bottom of each auxiliary material feeding hopper 601. The discharge port of each screw metering feeder 603 is connected to the inlet of the auxiliary material electronic weighing hopper 606 through its corresponding first auxiliary material feeding pipe 604. Each auxiliary material feeding pipe 604 is equipped with a first auxiliary material pneumatic butterfly valve 605; the discharge port at the bottom of the auxiliary material electronic weighing hopper 606 is connected to the electronic weighing transition hopper 609 through the second auxiliary material feeding pipe 607, and a second auxiliary material pneumatic butterfly valve 608 is installed on the second auxiliary material feeding pipe 607; the discharge port at the bottom of the electronic weighing transition hopper 609 is connected to the inlet of the mixing unit 50 in each group of mixing conveying extrusion feeding area 300 through the fifth conveying pipe 105.

[0071] like Figure 9 and Figure 10As shown, the structure of the mixing unit 50 in this embodiment is as follows: it includes a weighing hopper 51 with an electronic scale 54, a sixth pulse dust collector 52 installed on the top of the weighing hopper 51, the inlet of the weighing hopper 51 being the inlet of the mixing unit 50 in the mixing conveying extrusion feeding area 300, and a first Roots vacuum pump 53 installed on the weighing hopper 51 to draw materials from the CaCO3 transition unit 40, the PVC main material storage and conveying unit 20, and the wood flour main material storage and conveying unit 30 into the weighing hopper 51; the bottom of the weighing hopper 51... The discharge port is connected to the inlet of the second pneumatic butterfly valve 55 through the eighth pipe 208. The outlet of the second pneumatic butterfly valve 55 is connected to the inlet of the high-speed mixer 56 through the ninth pipe 209. The discharge port of the high-speed mixer 56 is connected to the inlet of the cooling mixer 57 through the tenth pipe 210. The discharge port of the cooling mixer 57 is connected to the inlet of the third pneumatic butterfly valve 58 through the eleventh pipe 211. The outlet of the third pneumatic butterfly valve 58 is connected to the inlet of the mixture conveying unit 60 through the sixth conveying pipeline 106.

[0072] The sensor in the auxiliary material electronic scale hopper 606 uses a Tolly multi-force sensor from the United States, and the sensor in the electronic scale 54 uses a Tolly multi-force sensor from the United States. This ensures high accuracy requirements for main material metering: dynamic ≤5‰, static ≤3‰, and high accuracy requirements for auxiliary material metering: dynamic ≤2-3‰, static ≤0.15‰.

[0073] like Figure 9 and Figure 11 As shown, the structure of the mixing material conveying unit 60 in this embodiment is as follows: it includes a transition material box 61, the inlet of which is the inlet of the mixing material conveying unit 60; the outlet at the bottom of the transition material box 61 is connected to the inlet of the first screw feeder 62, the outlet of the first screw feeder 62 is connected to the inlet of the transition hopper 63, the outlet at the bottom of the transition hopper 63 is connected to the inlet of the fourth manual butterfly valve 64, the third rotary valve 65, and the scraper conveyor 66 in sequence through the twelfth pipe 212, and the outlet of the scraper conveyor 66 is connected to the inlet of the mixing storage and extrusion feeding unit 70 through the seventh conveying pipeline 107.

[0074] like Figure 9 and Figure 12As shown, the structure of the mixture storage and extrusion feeding unit 70 in this embodiment is as follows: it includes a dry mixture silo 71, the inlet of which is the inlet of the mixture storage and extrusion feeding unit 70; the bottom outlet of the dry mixture silo 71 is connected to the inlet of the fifth manual butterfly valve 72, the fourth rotary valve 73, and the second screw feeder 74 in sequence through the thirteenth pipe 213; the outlet of the second screw feeder 74 is connected to several fifth branch pipes 305; each fifth branch pipe 305 is connected to an extruder 76; and a fourth pneumatic butterfly valve 75 is provided on the fifth branch pipe 305.

[0075] The lower section of the transition hopper 61 is a tapered structure with a gradually decreasing diameter, and a pusher motor is installed on this tapered structure. The lower section of the transition hopper 63 is also a tapered structure with a gradually decreasing diameter, and a first anti-bridging device is installed on this tapered structure. The lower section of the dry mix hopper 71 is also a tapered structure with a gradually decreasing diameter, and a second anti-bridging device is installed on this tapered structure. The first and second anti-bridging devices have the same structure, both consisting of a vibrating hammer 601 and a jetting device 602. Here, the pusher motor, the first anti-bridging device, and the second anti-bridging device promote the flow and conveying of materials.

[0076] In actual production, the transition hopper 61 is usually located in a pit, which is about 4 to 5 meters deep, while the transition hopper 63 is usually located on the ground. Multiple scraper conveyors can be connected to form a long conveyor line, thus achieving long-distance conveying. The actual required conveying length is usually around 30 meters. The calcium carbonate in the mixture output from the cooling mixer 56 has poor flowability and is prone to stratification. Here, a first screw feeder 62, a scraper conveyor 66, and a second screw feeder 74 are used to efficiently convey the mixture, thus helping to solve the problem of poor flowability and difficulty in long-distance material conveying.

[0077] In addition, the configuration of the first rotary valve 25, the second rotary valve 93, the third rotary valve 65, and the fourth rotary valve 73 can achieve uniform unloading of the corresponding units. If other ordinary valves are used to replace the first rotary valve 25, the second rotary valve 93, the third rotary valve 65, and the fourth rotary valve 73, the material is likely to get stuck in the ordinary valves, causing a blockage problem.

[0078] Furthermore, the high-speed mixer 56 adopts a thermal mixer with a guide structure, a side propeller structure, and a main propeller structure. The guide structure adopts the structure disclosed in Chinese invention patent application No. 2018112359259, and the side propeller structure and main propeller structure adopt the structure disclosed in Chinese utility model patent No. 2018217181718. The cooling mixer 57 adopts a new type of 1500 / 4500 large-scale horizontal mixing unit composed of high wear resistance, high corrosion resistance, multi-slurry multi-dimensional composite stirring, multi-enhanced multi-guide flow, and dual-cooling dual-combination high-efficiency cooling, achieving efficient mixing, energy saving and consumption reduction, and a mixing uniformity of 99.999%, meeting the advanced requirements of high-performance materials in the products.

[0079] To recover residual material in the second screw feeder 74, a more preferable embodiment is to further include an overflow recovery unit in the mixture storage and extrusion feeding unit 70; such as... Figure 12 As shown, the structure of the overflow recovery unit is as follows: it includes an overflow hopper 81, the overflow port of the second screw feeder 74 is connected to the inlet of the overflow hopper 81 through a first overflow pipe 801, the outlet of the overflow hopper 81 is connected to the inlet of the fifth pneumatic butterfly valve 82 through a second overflow pipe 802, the outlet of the fifth pneumatic butterfly valve 82 is connected to the inlet of the vacuum suction hopper 85 through a third overflow pipe 803, and a [missing information - likely a device or component] is connected to the third overflow pipe 803. The vacuum hopper 85 is equipped with an air supply valve 83 and a third pneumatic cleaning valve 84. The outlet of the vacuum hopper 85 is connected to the inlet of the sixth pneumatic butterfly valve 86 through the fourth overflow pipe 804. The outlet of the sixth pneumatic butterfly valve 86 is connected to the overflow recovery port of the dry mixture silo 71 through the fifth overflow pipe 805. A second Roots vacuum pump 87 is installed on the vacuum hopper 85 to suck the overflow into the vacuum hopper 71. A seventh pulse dust collector 88 is also installed on the vacuum hopper 85.

[0080] A more preferred embodiment is that pulse dust collectors are respectively installed on the high-speed mixer 56, the cooling mixer 57, and the transition hopper 61. Through the installation of the first pulse dust collector 12, the second pulse dust collector 22, the third pulse dust collector 32, the fourth pulse dust collector 42, the fifth pulse dust collector 92, the sixth pulse dust collector 52, and the seventh pulse dust collector 88, as well as the pulse dust collectors on the high-speed mixer 56, the cooling mixer 57, and the transition hopper 61, dust leakage during the operation of each unit in the device is effectively controlled, ensuring that the ambient dust concentration is controlled at 5 mg / m³. 3 Within this area, the work environment is friendly, achieving clean production.

[0081] A more preferred solution is to install a manual feeding port on the high-speed mixer 56. The discharge port at the bottom of the manual feeding hopper 59 is connected to the inlet of the sixth manual butterfly valve 5 via the fourteenth pipe 214, and the outlet of the sixth manual butterfly valve 5 is connected to the manual feeding port via the fifteenth pipe 215. In actual production, when it is necessary to add micro-materials or preparatory materials other than the auxiliary material discharge bin dust removal and weighing unit, CaCO3 bin 11, PVC bin 31, and wood powder bin 41 to the high-speed mixer 56, they can be added through the manual feeding hopper 59.

[0082] The aforementioned wood-plastic composite production system further includes a centralized control area 400, which is equipped with a PLC control and computer monitoring system. The control system controls the automatic valves and automatic electrical equipment of each component in the wood-plastic composite production system and displays the control results on the display screen of the PLC control and computer monitoring system.

[0083] The CaCO3 main material batching control process is as follows: The control system starts the pressure conveying tank device 15, the first pulse dust collector 12 and the first vibrating unloader 13, opens the first pneumatic butterfly valve 14, vibrates and unloads the material, and sends the CaCO3 output from the outlet of the first pneumatic butterfly valve 14 through the pressure conveying tank device 15 into the CaCO3 transition hopper 21. The control system starts the first Roots vacuum pump 53 in any mixing, conveying, extrusion feeding area 300, manually opens the first manual butterfly valve 24, starts the second vibrating unloader 23, and starts the first rotary valve 25 to rotate at conveying speed A. The CaCO3 in the CaCO3 transition hopper passes through the first rotary valve 25 and enters the weighing hopper 51 in the corresponding mixing, conveying, extrusion feeding area 300 under the suction of the first Roots vacuum pump 53. When the electronic scale 54 displays a value close to the CaCO3 weight, the control system causes the first rotary valve 25 to rotate at conveying speed B. The conveying speed A is greater than the conveying speed B. When the electronic scale 54 displays the CaCO3 weight target value, the control system closes the first rotary valve 25 and the first Roots vacuum pump 53.

[0084] The PVC main material batching control process is as follows: First, the control system starts the first pneumatic cleaning valve 36 to clean the material in the pipeline and suck out the material in the pipeline; then, the control system starts the first Roots vacuum pump 53 in any mixing, conveying, extrusion feeding area 300, manually opens the second manual butterfly valve 33, and the control system starts the third pneumatic ball valve 403 and the fourth pneumatic ball valve 404. Under the suction of the first Roots vacuum pump 53, the PVC in the PVC hopper 31 first enters the first suction hopper 34, and then enters the weighing hopper 51 in the corresponding mixing, conveying, extrusion feeding area 300.

[0085] The main material batching control process of wood flour is as follows: First, the control system starts the second pneumatic cleaning valve 47 to clean the material in the pipeline and suck out the material in the pipeline; then, the control system starts the first Roots vacuum pump 53 in any mixing, conveying, extrusion feeding area 300, manually opens the third manual butterfly valve 44, and the control system starts the third vibrating unloader 43, the fifth pneumatic ball valve 405 and the sixth pneumatic ball valve 406. Under the suction of the first Roots vacuum pump 53, the wood flour in the wood flour silo 41 first enters the second suction hopper 45, and then enters the weighing hopper 51 in the corresponding mixing, conveying, extrusion feeding area 300.

[0086] In this embodiment, a more preferred approach is to install a first rotary level gauge 501 and a second rotary level gauge 502 on the CaCO3 silo 11, both located in the upper limit region of the CaCO3 silo 11. The first rotary level gauge 501 is located at a high point in the upper limit region of the CaCO3 silo 11, and the second rotary level gauge 502 is located at a low point in the upper limit region of the CaCO3 silo 11. Additionally, a third rotary level gauge 503 and a fourth rotary level gauge 504 are installed on the CaCO3 silo 11, both located in the lower limit region of the CaCO3 silo 11. The third rotary level gauge 503 is located at a high point in the lower limit region of the CaCO3 silo 11, and the fourth rotary level gauge 504 is located at a low point in the lower limit region of the CaCO3 silo 11.

[0087] A fifth rotary paddle level gauge 505 is installed on the CaCO3 transition hopper 21 at the upper limit position of the CaCO3 transition hopper 21, and a sixth rotary paddle level gauge 506 is installed on the CaCO3 transition hopper 21 at the lower limit position of the CaCO3 transition hopper 21.

[0088] Each PVC silo 31 is equipped with a seventh rotary level gauge 507 and an eighth rotary level gauge 508 located in the upper limit region of the PVC silo 31. The PVC silo 31 is also equipped with a ninth rotary level gauge 509 and a tenth rotary level gauge 510 located in the lower limit region of the PVC silo 31. The ninth rotary level gauge 509 is located at the high point of the upper limit region of the PVC silo 31, and the tenth rotary level gauge 510 is located at the low point of the upper limit region of the PVC silo 31.

[0089] An eleventh rotary level gauge 511 is installed on the wood powder silo 41 at the upper limit position of the wood powder silo 41, a twelfth rotary level gauge 512 is installed on the wood powder silo 41 at the middle position of the wood powder silo 41, and a thirteenth rotary level gauge 513 is installed on the wood powder silo 41 at the lower limit position of the wood powder silo 41.

[0090] The signal lines of the thirteen rotary level gauges 501 (first), 502 (second), 503 (third), 504 (fourth), 505 (fifth), 506 (sixth), 507 (seventh), 508 (eighth), 509 (ninth), 510 (tenth), 511 (eleventh), 512 (twelfth), and 513 (thirteenth) are all connected to the control system. These thirteen rotary level gauges can feed back signals to the control system, which then processes the signals.

[0091] During the process of adding material to CaCO3 silo 11, when the material in CaCO3 silo 11 reaches the second rotary paddle level gauge 502, the control system controls the alarm light to flash and displays the first warning that the CaCO3 silo is full on the display screen; when the material in CaCO3 silo 11 reaches the first rotary paddle level gauge 501, the control system controls the alarm light to flash and displays the second warning that the CaCO3 silo is full on the display screen.

[0092] During the process of conveying CaCO3 from CaCO3 silo 11 to CaCO3 transition hopper 21, when the material in CaCO3 silo 11 reaches the third rotary paddle level gauge 503, the control system controls the alarm light to flash and displays the first reminder of CaCO3 silo material shortage on the display screen; when the material in CaCO3 silo 11 reaches the fourth rotary paddle level gauge 504, the control system controls the alarm light to flash and displays the second reminder of CaCO3 silo material shortage on the display screen.

[0093] During the process of conveying CaCO3 from CaCO3 silo 11 to CaCO3 transition hopper 21, when the material in CaCO3 transition hopper 21 reaches the fifth rotary paddle level gauge 504, the control system controls the alarm light to flash and displays a full material reminder for CaCO3 transition hopper 21 on the display screen. During the process of conveying CaCO3 from CaCO3 transition hopper 21 to weighing hopper 51, when the material in CaCO3 transition hopper 21 reaches the sixth rotary paddle level gauge 506, the control system controls the alarm light to flash and displays a low material reminder for CaCO3 transition hopper on the display screen.

[0094] During the process of adding material to PVC silo 31, when the material in PVC silo 31 reaches the eighth rotary paddle level gauge 508, the control system controls the alarm light to flash and displays the first reminder that the PVC silo is full on the display screen; when the material in PVC silo 31 reaches the seventh rotary paddle level gauge 507, the control system controls the alarm light to flash and displays the second reminder that the PVC silo is full on the display screen.

[0095] During the process of conveying PVC from PVC silo 31 to weighing hopper 51, when the material in PVC silo 31 reaches the ninth rotary paddle level gauge 509, the control system controls the alarm light to flash and displays the first reminder of PVC silo material shortage on the display screen; when the material in PVC silo 31 reaches the tenth rotary paddle level gauge 510, the control system controls the alarm light to flash and displays the second reminder of PVC silo material shortage on the display screen.

[0096] During the process of adding material to the wood powder silo 41, when the material in the wood powder silo 41 reaches the eleventh rotary level gauge 511, the control system controls the alarm light to flash and displays a wood powder silo full reminder on the display screen; when the material in the wood powder silo 41 reaches the twelfth rotary level gauge 512, the control system controls the alarm light to flash and displays a wood powder half-filled reminder on the display screen; when the material in the wood powder silo 41 reaches the thirteenth rotary level gauge 513, the control system controls the alarm light to flash and displays a wood powder silo low reminder on the display screen.

[0097] 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 plastic-wood product production system apparatus comprising: The facility comprises a main material storage and conveying area, an auxiliary material feeding and weighing area, and at least one mixing, conveying, and extrusion feeding area; characterized in that: the main material storage and conveying area is equipped with a CaCO3 main material storage and conveying unit, a CaCO3 transition unit, two sets of PVC main material storage and conveying units, and a wood flour main material storage and conveying unit; the auxiliary material feeding and weighing area is equipped with an auxiliary material unloading hopper and dust removal weighing unit; and the mixing, conveying, and extrusion feeding area is equipped with a mixing unit, a mixed material conveying unit, and a mixed material storage and extrusion feeding unit; The outlet of the CaCO3 main material storage and conveying unit is connected to the inlet of the CaCO3 transition unit via a first conveying pipeline. The outlet of the CaCO3 transition unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a second conveying pipeline. The outlet of each group of PVC main material storage and conveying units is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a third conveying pipeline. The outlet of the wood flour main material storage and conveying unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a fourth conveying pipeline. The auxiliary material unloading hopper dust removal and weighing unit is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding area through the fifth conveying pipeline; a first pneumatic ball valve is installed on the fifth conveying pipeline; The discharge port of the mixing unit is connected to the inlet of the mixing conveying unit through the sixth conveying pipeline, and the discharge port of the mixing conveying unit is connected to the inlet of the mixing storage and extrusion feeding unit through the seventh conveying pipeline.

2. The system for producing a plastic-wood product according to claim 1, wherein: The structure of the CaCO3 main material storage and conveying unit is as follows: it includes a CaCO3 silo, a first pulse dust collector installed on the top of the CaCO3 silo, and a first vibrating unloader installed at the discharge port at the bottom of the CaCO3 silo. The discharge port at the bottom of the first vibrating unloader is connected to the inlet of a first pneumatic butterfly valve through a first pipe. The outlet of the first pneumatic butterfly valve is connected to the inlet of a pressure conveying tank device through a second pipe. The discharge port of the pressure conveying tank device is connected to the inlet of the CaCO3 transition unit through a first conveying pipeline. The structure of the CaCO3 transition unit includes: a CaCO3 transition hopper, a second pulse dust collector installed at the top of the CaCO3 transition hopper, and a second vibrating unloader installed at the discharge port at the bottom of the CaCO3 transition hopper. The inlet of the CaCO3 transition hopper is the inlet of the CaCO3 transition unit. The discharge port at the bottom of the second vibrating unloader is connected to the inlet of a first manual butterfly valve via a third pipe. The outlet of the first manual butterfly valve is connected to two first branch pipes, and a first rotary valve is installed on each first branch pipe. Each first rotary valve corresponds to a mixing, conveying, extrusion, and feeding area. The second conveying pipe is composed of two second branch pipes. The outlet of each first rotary valve is connected to the inlet of the mixing unit in the corresponding mixing, conveying, extrusion, and feeding area via a second branch pipe. A second pneumatic ball valve is installed on each second branch pipe. The structure of each PVC main material storage and conveying unit is as follows: it includes a PVC silo, a third pulse dust collector installed on the top of the PVC silo, the discharge port at the bottom of the PVC silo is connected to the inlet of the second manual butterfly valve through a fourth pipe, and the outlet of the second manual butterfly valve is connected to the inlet of the first suction hopper through a fifth pipe; the third conveying pipeline consists of two third branch pipes, the outlet of the first suction hopper is connected to the two third branch pipes respectively, each third branch pipe corresponds to a mixing conveying extrusion feeding area, and each third branch pipe is connected to the inlet of the mixing unit in the corresponding mixing conveying extrusion feeding area; a third pneumatic ball valve is provided at the inlet end of each third branch pipe, a first air intake regulating valve and a first pneumatic cleaning valve are connected to each third branch pipe, and a fourth pneumatic ball valve is provided at the outlet of each third branch pipe; The structure of the wood flour main material storage and conveying unit is as follows: it includes a wood flour silo, a fourth pulse dust collector installed on the top of the wood flour silo, and a third vibrating unloader installed at the discharge port at the bottom of the wood flour silo. The discharge port at the bottom of the third vibrating unloader is connected to the inlet of a third manual butterfly valve through a sixth pipe. The outlet of the third manual butterfly valve is connected to the inlet of a second suction hopper through a seventh pipe. The fourth conveying pipeline consists of two fourth branch pipes. The outlet of the second suction hopper is connected to the two fourth branch pipes respectively. Each fourth branch pipe corresponds to a mixing conveying extrusion feeding area. Each fourth branch pipe is connected to the inlet of the mixing unit in the corresponding mixing conveying extrusion feeding area. A fifth pneumatic ball valve is installed at the inlet end of each fourth branch pipe. A second air intake regulating valve and a second pneumatic cleaning valve are connected to each fourth branch pipe. A sixth pneumatic ball valve is installed at the outlet of each fourth branch pipe.

3. A wood-plastic composite product manufacturing system according to claim 1 or 2, characterized in that: The structure of the auxiliary material feeding hopper dust removal and weighing unit is as follows: it includes several auxiliary material feeding hoppers, each with a central dust collector at the top, a screw metering feeder connected to the bottom outlet of each auxiliary material feeding hopper, and the outlet of each screw metering feeder connected to the inlet of the auxiliary material electronic weighing hopper via a corresponding first auxiliary material feeding pipe. A first auxiliary material pneumatic butterfly valve is installed on each first auxiliary material feeding pipe. The outlet at the bottom of the auxiliary material electronic weighing hopper is connected to the electronic scale transition hopper via a second auxiliary material feeding pipe, and a second auxiliary material pneumatic butterfly valve is installed on the second auxiliary material feeding pipe. The outlet at the bottom of the electronic scale transition hopper is connected to the inlet of the mixing unit in each group of mixing conveying extrusion feeding areas via a fifth conveying pipeline.

4. The plastic-wood product production system device according to claim 2, characterized in that: The CaCO3 silo, PVC silo, and wood powder silo are also equipped with corresponding silo feeding areas, which are equipped with manual feeding equipment or tank trucks; and the PVC silos in the two sets of PVC main material storage and conveying units share one manual feeding equipment. The structure of the manual feeding equipment includes: a manual feeding hopper, a fifth pulse dust collector installed on the top of the manual feeding hopper, the discharge port at the bottom of the manual feeding hopper being connected to the inlet of a second rotary valve through a first feeding pipe, the outlet of the second rotary valve being connected to an air duct through a second feeding pipe, one end of the air duct being connected to the feeding port of a CaCO3 silo, a PVC silo, or a wood powder silo, and the other end of the air duct being connected to a Roots blower; The wood-plastic composite production system also includes a centralized control area, where manual feeding equipment is controlled by a control system within the centralized control area.

5. The plastic-wood product production system device according to claim 3, characterized in that: The structure of the mixing unit is as follows: it includes a weighing hopper with an electronic scale and a sixth pulse dust collector installed on the top of the weighing hopper. The inlet of the weighing hopper is the inlet of the mixing unit in the mixing conveying extrusion feeding area. A first Roots vacuum pump is installed on the weighing hopper to suck materials from the CaCO3 transition unit, the PVC main material storage and conveying unit, and the wood flour main material storage and conveying unit into the weighing hopper. The outlet at the bottom of the weighing hopper is connected to the inlet of the second pneumatic butterfly valve through an eighth pipe. The outlet of the second pneumatic butterfly valve is connected to the inlet of the high-speed mixer through a ninth pipe. The outlet of the high-speed mixer is connected to the inlet of the cooling mixer through a tenth pipe. The outlet of the cooling mixer is connected to the inlet of the third pneumatic butterfly valve through an eleventh pipe. The outlet of the third pneumatic butterfly valve is connected to the inlet of the mixing conveying unit through a sixth conveying pipeline. The structure of the mixture conveying unit is as follows: it includes a transition hopper, the inlet of which is the inlet of the mixture conveying unit; the outlet at the bottom of the transition hopper is connected to the inlet of the first screw feeder, the outlet of the first screw feeder is connected to the inlet of the transition hopper, the outlet at the bottom of the transition hopper is connected in sequence to the fourth manual butterfly valve, the third rotary valve, and the inlet of the scraper conveyor through the twelfth pipe, and the outlet of the scraper conveyor is connected to the inlet of the mixture storage and extrusion feeding unit through the seventh conveying pipeline; The structure of the mixture storage and extrusion feeding unit is as follows: it includes a dry mixture silo, the inlet of which is the inlet of the mixture storage and extrusion feeding unit; the bottom outlet of the dry mixture silo is connected in sequence to the inlet of the fifth manual butterfly valve, the fourth rotary valve, and the second screw feeder via the thirteenth pipe; the outlet of the second screw feeder is connected to several fifth branch pipes, each fifth branch pipe is connected to an extruder, and a fourth pneumatic butterfly valve is installed on the fifth branch pipe.

6. The plastic-wood product production system device according to claim 5, characterized in that: The high-speed mixer is a thermal mixer structure with a flow guide structure, a side paddle structure, and a main paddle structure. A manual feeding port is provided on the high-speed mixer. The discharge port at the bottom of the manual feeding hopper is connected to the inlet of the sixth manual butterfly valve through the fourteenth pipe. The outlet of the sixth manual butterfly valve is connected to the manual feeding port through the fifteenth pipe.

7. The plastic-wood product production system apparatus according to claim 5, characterized in that: An overflow recovery unit is also provided in the mixed material storage and extrusion feeding unit; the structure of the overflow recovery unit is as follows: it includes an overflow hopper, the overflow port of the second screw feeder is connected to the inlet of the overflow hopper through a first overflow pipe, the outlet of the overflow hopper is connected to the inlet of the fifth pneumatic butterfly valve through a second overflow pipe, the outlet of the fifth pneumatic butterfly valve is connected to the inlet of the vacuum suction hopper through a third overflow pipe, a make-up air valve and a third pneumatic cleaning valve are connected to the third overflow pipe, the outlet of the vacuum suction hopper is connected to the inlet of the sixth pneumatic butterfly valve through a fourth overflow pipe; an overflow recovery port is provided on the dry mixed material silo, the outlet of the sixth pneumatic butterfly valve is connected to the overflow recovery port of the dry mixed material silo through a fifth overflow pipe, and a second Roots vacuum pump is provided on the vacuum suction hopper to suck the overflow into the vacuum suction hopper.

8. The plastic-wood product production system apparatus according to claim 5, characterized in that: The wood-plastic composite production system also includes: a centralized control area, which is equipped with a control system, including a PLC control and a computer monitoring system; the automatic valves and automatic electrical equipment of each component in the wood-plastic composite production system are all controlled by the control system.

9. The plastic-wood product production system apparatus according to claim 8, characterized in that: A first rotary paddle level gauge and a second rotary paddle level gauge are installed on the CaCO3 silo in the upper limit area of ​​the CaCO3 silo. The first rotary paddle level gauge is located at the high point of the upper limit area of ​​the CaCO3 silo, and the second rotary paddle level gauge is located at the low point of the upper limit area of ​​the CaCO3 silo. A third rotary paddle level gauge and a fourth rotary paddle level gauge are installed on the CaCO3 silo in the lower limit area of ​​the CaCO3 silo. The third rotary paddle level gauge is located at the high point of the lower limit area of ​​the CaCO3 silo, and the fourth rotary paddle level gauge is located at the low point of the lower limit area of ​​the CaCO3 silo. A fifth rotary paddle level gauge is installed on the CaCO3 transition hopper at the upper limit position of the CaCO3 transition hopper, and a sixth rotary paddle level gauge is installed on the CaCO3 transition hopper at the lower limit position of the CaCO3 transition hopper. Each PVC silo is equipped with a seventh and an eighth rotary level gauge located in the upper limit area of ​​the PVC silo, and a ninth and a tenth rotary level gauge located in the lower limit area of ​​the PVC silo. The ninth rotary level gauge is located at the high point of the upper limit area of ​​the PVC silo, and the tenth rotary level gauge is located at the low point of the upper limit area of ​​the PVC silo. An eleventh rotary level gauge is installed on the wood powder silo at the upper limit position, a twelfth rotary level gauge is installed on the wood powder silo at the middle position, and a thirteenth rotary level gauge is installed on the wood powder silo at the lower limit position. The signal lines of the thirteen rotary level gauges—the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, and thirteenth—are all connected to the control system.

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