Particle raw material centralized conveying device for plastic pipe production

Abstract

The utility model relates to the technical field of plastic pipe production, in particular to a granular raw material centralized conveying device for plastic pipe production, which comprises a raw material bin, a movable feeding assembly, a conveying assembly and an output assembly, a movable feeding assembly is installed on the outer side of the raw material bin, a conveying assembly is installed at the outer end of the raw material bin, and an output assembly is installed on the outer side of the conveying assembly. The conveying assembly comprises a conical discharging frame, an electronic scale storage barrel, a first electromagnetic valve, a vacuum suction machine, a vacuum suction pipe, a driving motor, a spiral stirring barrel, a batching bin, a suction pipe, a drying box, a photoelectric correlation module, an extruder, a vacuum header pipe, a second electromagnetic valve and an auxiliary pipe. An electronic scale storage barrel is arranged below the conical discharging frame, a first electromagnetic valve is arranged between the electronic scale storage barrel and the conical discharging frame, and a PLC control panel is arranged on the outer wall of the raw material bin. The first electromagnetic valve is adopted to control raw materials to fall into the electronic scale storage barrel for weighing.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe production, in particular to a centralized conveying device for granular raw materials used in plastic pipe production. Background Art

[0002] Plastic pipes are chemical building materials composed of high-tech composites. With their superior properties such as hygiene, environmental protection, and low consumption, they are widely accepted by users. The main types of plastic pipes include UPVC drain pipes, UPVC water supply pipes, aluminum-plastic composite pipes, polyethylene (PE) water supply pipes, polypropylene PPR hot water pipes, etc. The granules for plastic pipe production refer to the raw materials used to make plastic pipes, mainly in the form of semi-finished plastics. After specific process treatments such as melting and extrusion, plastic pipes of various shapes and sizes are formed. When producing plastic pipes, a centralized conveying device for granular raw materials is required to accurately convey them to each processing station to achieve continuous supply of the plastic raw materials required for production.

[0003] In the existing conveying device, during the conveying process, the materials are usually uniformly added to the raw material tank and conveyed using a vacuum pump. Since the amounts of raw materials in different production batches of plastic pipes are different, uniformly adding the materials for conveying treatment easily leads to confusion between the raw materials, making production scheduling complex and difficult and affecting the product quality.

[0004] Therefore, in view of the problem that the existing conveying device uniformly adds materials for conveying treatment during the conveying process, which easily leads to confusion between the raw materials and reduces the product quality, a centralized conveying device for granular raw materials used in plastic pipe production can be designed to separately feed different raw materials into the corresponding raw material bins to ensure the use of the correct raw materials during production and avoid raw material confusion. Content of the Utility Model

[0005] In order to overcome the problem that the existing conveying device uniformly adds materials for conveying treatment during the conveying process, which easily leads to confusion between the raw materials and reduces the product quality.

[0006] The technical solution of the present utility model is: a centralized conveying device for granular raw materials used in the production of plastic pipes, including a raw material bin, a mobile feeding component, a conveying component, and an output component; a mobile feeding component is installed on the outer side of the raw material bin, a conveying component is installed at the outer end of the raw material bin, and an output component is installed on the outer side of the conveying component. The conveying component includes a conical feeding frame, an electronic scale storage barrel, a first electromagnetic valve, a vacuum suction machine, a vacuum suction pipe, a driving motor, a spiral stirring barrel, a batching bin, a suction pipe, a drying box, a photoelectric pair-emitting module, an extruder, a vacuum main pipe, a second electromagnetic valve, and a sub-pipe. The conical feeding frame is located at the lower end of the raw material bin, an electronic scale storage barrel is arranged below the conical feeding frame, a first electromagnetic valve is arranged between the electronic scale storage barrel and the conical feeding frame, and a PLC control panel is arranged on the outer wall of the raw material bin.

[0007] Preferably, the first electromagnetic valve is used to control the raw materials to fall into the electronic scale storage barrel for weighing, accurately controlling the inflow of the raw materials, so that the raw materials fall into the electronic scale storage barrel accurately according to the preset flow rate or time, improving the accuracy of weighing, realizing automatic control, reducing manual intervention, and the accurate weighing can reduce the waste of materials caused by excess or deficiency, ensuring that the amount of raw materials input each time meets the production requirements. Use the PLC control panel to input the weights of various raw materials and the stirring time to realize the four-cycle actions of automatic control of feeding, weighing, feeding, stirring and drying, and feeding into the batching storage bin. Use the vacuum suction machine to connect the vacuum suction machine to send the materials into the spiral stirring barrel for stirring. The vacuum suction machine can form a closed conveying environment, effectively reducing the diffusion and pollution of dust, maintaining the cleanliness of the production workshop. At the same time, the materials are transported into the spiral stirring barrel to realize the continuous transportation and stirring of the materials, fully stirring and mixing the materials to make the materials reach the required uniformity. Use the PLC control panel to input the weights of various raw materials and the stirring time to realize the four-cycle actions of automatic control of feeding, weighing, feeding, stirring and drying, and feeding into the batching storage bin.

[0008] As a preference, a vacuum suction machine is arranged at the outer end of the electronic scale storage barrel, a vacuum suction pipe is arranged at one end of the vacuum suction machine, a spiral stirring barrel is arranged on the outer side of the raw material bin, and the electronic scale storage barrel is connected to the spiral stirring barrel through the vacuum suction pipe. Use the vacuum suction machine to connect the vacuum suction pipe to send the materials into the spiral stirring barrel for stirring. The vacuum suction machine can form a closed conveying environment, effectively reducing the diffusion and pollution of dust, maintaining the cleanliness of the production workshop. At the same time, the materials are transported into the spiral stirring barrel to realize the continuous transportation and stirring of the materials, fully stirring and mixing the materials to make the materials reach the required uniformity.

[0009] Preferably, a batching bin is provided outside the spiral stirring barrel. The spiral stirring barrel is communicated with the batching bin through a vacuum suction pipe. Two groups of suction pipes are provided at the lower end of the batching bin. Two groups of drying boxes are provided outside the batching bin. The two groups of suction pipes extend through the drying boxes to the inside. An extruder is provided at the lower end of the drying box. An optoelectronic pair-emitting module is provided at the outer end of the drying box. By using the optoelectronic pair-emitting module to control the material to enter the drying box for processing, the position of the material is monitored in real time, the conveying speed of the material is controlled, and the uniform distribution of the material during the drying process is ensured, avoiding material accumulation or idling, and improving the drying efficiency.

[0010] Preferably, a vacuum main pipe is provided at the upper end of the drying box. A sub-pipe is provided on one side of the drying box away from the vacuum main pipe. The sub-pipe is communicated with the vacuum main pipe. Second electromagnetic valves are provided at the outer ends of the sub-pipe and the vacuum main pipe. A filter screen is provided between the drying box and the vacuum main pipe. By installing a filter screen at the connection between the drying box and the vacuum main pipe and the sub-pipe, raw materials are isolated from entering the inside of the vacuum main pipe, preventing raw materials from accumulating or blocking in the vacuum pipe, and protecting the normal operation of the vacuum system.

[0011] Preferably, the mobile feeding assembly includes a material box, a screw conveyor pipe, a discharge pipe and universal wheels. The material box is located outside the raw material bin. A screw conveyor pipe is provided inside the material box. A driver is provided at one end of the screw conveyor pipe. A discharge pipe is provided at the lower end of the screw conveyor pipe. The universal wheels are located at the lower corners of the material box. By using the universal wheels to support the movement of the material box and feeding the corresponding grade raw materials into the raw material bin through the screw conveyor pipe, the material box can move in different directions and angles, easily move to any position on the production line, meet different production requirements, and feed different grades of raw materials into the corresponding raw material bins respectively, which can ensure the use of the correct raw materials during the production process, avoid raw material confusion, and improve the product quality.

[0012] Preferably, the output assembly includes a dust filter box, an output pipe, a vacuum gas storage cylinder, a connecting pipe and a Roots vacuum pump. The dust filter box is located outside the drying box. The dust filter box is communicated with the drying box through the vacuum main pipe. By using the dust filter box to filter the gas output from the vacuum main pipe and remove the dust particles therein, preventing the dust from leaking into the environment during the conveying process and causing pollution, and at the same time avoiding the dust from entering the subsequent operating equipment, reducing the wear and blockage of the equipment, and prolonging its service life.

[0013] Preferably, a vacuum gas storage cylinder is provided on one side of the dust filter box. An output pipe is provided between the vacuum gas storage cylinder and the dust filter box. A connecting pipe is provided at the outer end of the vacuum gas storage cylinder. A Roots vacuum pump is provided at one end of the connecting pipe. The gas is output by connecting the Roots vacuum pump through the vacuum gas storage cylinder. The vacuum gas storage cylinder serves as a buffer device to ensure the stable air pressure in the conveying device, reduce the failure rate and maintenance cost of the vacuum pump, ensure the smooth gas conveying, and improve the output efficiency.

[0014] Advantages of the utility model:

[0015] 1. Compared with traditional conveying devices, by using the first electromagnetic valve to control the raw materials to fall into the weighing bucket of the electronic scale for weighing, the inflow of raw materials is accurately controlled, so that the raw materials fall into the weighing bucket of the electronic scale precisely according to the preset flow rate or time, realizing automatic control, reducing manual intervention, and accurate weighing can reduce material waste caused by overage or shortage, ensuring that the amount of raw materials input each time meets the production requirements. The vacuum feeder is used to connect the vacuum feeder to send the materials into the spiral stirring bucket for stirring. The vacuum feeder can form a closed conveying environment, effectively reducing the diffusion and pollution of dust, maintaining the cleanliness of the production workshop. At the same time, the materials are transported into the spiral stirring bucket to realize continuous transportation and stirring of the materials, fully stirring and mixing the materials to make the materials reach the required uniformity. The PLC control panel is used to input the weights of various raw materials and the stirring time to realize four cyclic actions of automatic control of discharging, weighing, feeding, stirring and drying, and feeding into the batching storage bin;

[0016] 2. By using the photoelectric pair-emission module to control the materials to enter the drying oven for treatment, the position of the materials is monitored in real time, the conveying speed of the materials is controlled, and the uniform distribution of the materials during the drying process is ensured, avoiding material accumulation or idling. A filter screen is installed at the connection between the drying oven and the vacuum main pipe and the auxiliary pipe to isolate the raw materials from entering the vacuum main pipe, preventing the raw materials from accumulating or blocking in the vacuum pipe, protecting the normal operation of the vacuum system. Secondly, the universal wheels support the movement of the material box, and the material is sent into the corresponding grade raw material bin through the auger transmission pipe, enabling the material box to move in different directions and angles, easily moving to any position on the production line to meet different production requirements. Sending different grades of raw materials into the corresponding raw material bins can ensure the use of the correct raw materials during the production process, avoid raw material confusion, and improve the product quality;

[0017] 3. By using the dust filter box to filter the gas output from the vacuum main pipe, removing the dust particles therein, preventing the dust from leaking into the environment during the conveying process and causing pollution, and at the same time avoiding the dust from entering the subsequent operating equipment, reducing wear and blockage of the equipment, and prolonging its service life. The vacuum air storage cylinder is used to connect the Roots vacuum pump to output the gas. The vacuum air storage cylinder serves as a buffer device to ensure the stable air pressure in the conveying device, reduce the failure rate and maintenance cost of the vacuum pump, ensure the smooth gas conveying, and improve the output efficiency. Description of the drawings

[0018] Figure 1 Shows the overall structural schematic diagram of the utility model;

[0019] Figure 2 Shows the bottom structural schematic diagram of the weighing bucket of the electronic scale of the utility model;

[0020] Figure 3 The schematic structural diagram of the spiral stirring barrel of the present utility model is shown;

[0021] Figure 4 The schematic structural diagram of the output component of the present utility model is shown.

[0022] Explanation of reference numerals in the drawings: 1, raw material bin; 201, material box; 202, auger transfer pipe; 203, discharge pipe; 204, universal wheel; 301, conical blanking frame; 302, electronic scale storage barrel; 303, first electromagnetic valve; 304, vacuum suction machine; 305, vacuum suction pipe; 306, drive motor; 307, spiral stirring barrel; 308, batching bin; 309, suction pipe; 310, drying oven; 311, photoelectric pair emission module; 312, extruder; 313, vacuum main pipe; 314, second electromagnetic valve; 315, auxiliary pipe; 401, dust filter box; 402, output pipe; 403, vacuum gas storage cylinder; 404, connecting pipe; 405, Roots vacuum pump. Specific embodiments

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] Please refer to Figures 1-4 , the present utility model provides an embodiment: a centralized conveying device for granular raw materials used in the production of plastic pipes, including a raw material bin 1, a mobile feeding component, a conveying component and an output component; a mobile feeding component is installed on the outer side of the raw material bin 1, a conveying component is installed at the outer end of the raw material bin 1, and an output component is installed on the outer side of the conveying component. The conveying component includes a conical blanking frame 301, an electronic scale storage barrel 302, a first electromagnetic valve 303, a vacuum suction machine 304, a vacuum suction pipe 305, a drive motor 306, a spiral stirring barrel 307, a batching bin 308, a suction pipe 309, a drying oven 310, a photoelectric pair emission module 311, an extruder 312, a vacuum main pipe 313, a second electromagnetic valve 314, and an auxiliary pipe 315. The conical blanking frame 301 is located at the lower end of the raw material bin 1, an electronic scale storage barrel 302 is provided below the conical blanking frame 301, a first electromagnetic valve 303 is provided between the electronic scale storage barrel 302 and the conical blanking frame 301, and a PLC control panel is provided on the outer wall of the raw material bin 1.

[0025] Please refer to Figures 1-2, in this embodiment, a vacuum feeder 304 is provided at the outer end of the electronic scale storage bin 302. One end of the vacuum feeder 304 is provided with a vacuum suction pipe 305. A spiral stirring barrel 307 is provided outside the raw material bin 1. The electronic scale storage bin 302 is connected to the spiral stirring barrel 307 through the vacuum suction pipe 305. By using the vacuum feeder 304 connected to the vacuum suction pipe 305 to send the material into the spiral stirring barrel 307 for stirring, the vacuum feeder 304 can form a closed conveying environment, effectively reducing the diffusion and pollution of dust and maintaining the cleanliness of the production workshop. At the same time, the material is transported into the spiral stirring barrel 307 to realize the continuous transportation and stirring of the material, fully stirring and mixing the material to make the material reach the required uniformity. A batching bin 308 is provided outside the spiral stirring barrel 307. The spiral stirring barrel 307 is connected to the batching bin 308 through the vacuum suction pipe 305. Two sets of suction pipes 309 are provided at the lower end of the batching bin 308. Two sets of drying boxes 310 are provided outside the batching bin 308. The two sets of suction pipes 309 extend through the drying boxes 310 to the inside. An extruder 312 is provided at the lower end of the drying boxes 310. A photoelectric pair-emission module 311 is provided at the outer end of the drying boxes 310. By using the photoelectric pair-emission module 311 to control the material to enter the drying boxes 310 for treatment, the position of the material is monitored in real time, the conveying speed of the material is controlled, and the uniform distribution of the material during the drying process is ensured, avoiding material accumulation or idling and improving the drying efficiency.

[0026] Please refer to Figures 1-3 , in this embodiment, a vacuum main pipe 313 is provided at the upper end of the drying boxes 310. A sub-pipe 315 is provided on one side of the drying boxes 310 away from the vacuum main pipe 313. The sub-pipe 315 is connected to the vacuum main pipe 313. A second electromagnetic valve 314 is provided at the outer ends of the sub-pipe 315 and the vacuum main pipe 313. A filter screen is provided between the drying boxes 310 and the vacuum main pipe 313. By installing a filter screen at the connection between the drying boxes 310 and the vacuum main pipe 313 and the sub-pipe 315, raw materials are isolated from entering the interior of the vacuum main pipe 313, preventing raw materials from accumulating or blocking in the vacuum pipe and protecting the normal operation of the vacuum system. The mobile feeding assembly includes a material box 201, a screw conveyor pipe 202, a discharge pipe 203, and universal wheels 204. The material box 201 is located outside the raw material bin 1. A screw conveyor pipe 202 is provided inside the material box 201. A driver is provided at one end of the screw conveyor pipe 202. A discharge pipe 203 is provided at the lower end of the screw conveyor pipe 202. The universal wheels 204 are located at the lower corners of the material box 201. By using the universal wheels 204 to support the movement of the material box 201 and sending the corresponding grade raw materials into the raw material bin 1 through the screw conveyor pipe 202, the material box 201 can move in different directions and angles and easily move to any position on the production line to meet different production requirements. Sending different grades of raw materials into the corresponding raw material bins 1 respectively can ensure the use of the correct raw materials during the production process, avoid raw material confusion, and improve the product quality.

[0027] Please refer to Figures 2-4 Figures 2-4 , in this embodiment, the output assembly includes a dust filtration box 401, an output pipe 402, a vacuum storage cylinder 403, a connecting pipe 404, and a Roots vacuum pump 405. The dust filtration box 401 is located outside the drying box 310. The dust filtration box 401 is communicated with the drying box 310 through a vacuum main pipe 313. By using the dust filtration box 401 to filter the gas output from the vacuum main pipe 313, the dust particles therein are removed, preventing dust from leaking into the environment during transportation and causing pollution. At the same time, it avoids dust from entering the subsequent operating equipment, reducing wear and blockage of the equipment and extending its service life. One side of the dust filtration box 401 is provided with a vacuum storage cylinder 403. An output pipe 402 is provided between the vacuum storage cylinder 403 and the dust filtration box 401. The outer end of the vacuum storage cylinder 403 is provided with a connecting pipe 404. One end of the connecting pipe 404 is provided with a Roots vacuum pump 405. The output gas is connected to the Roots vacuum pump 405 through the vacuum storage cylinder 403. The vacuum storage cylinder 403 serves as a buffer device to ensure the stable air pressure in the conveying device, reduce the failure rate and maintenance cost of the vacuum pump, ensure the smooth gas transportation, and improve the output efficiency.

[0028] When working, first use the universal wheels 204 to support the movement of the material box 201, and send it into the corresponding grade raw material bin 1 through the auger transfer pipe 202, so that the material box 201 can move in different directions and angles, easily move to any position on the production line, meet different production requirements, and send raw materials of different grades into the corresponding raw material bins 1 respectively, which can ensure the use of the correct raw materials during production and avoid raw material confusion. Use the first electromagnetic valve 303 to control the raw materials to fall into the electronic scale storage barrel 302 for weighing, accurately control the inflow of raw materials, so that the raw materials fall into the electronic scale storage barrel 302 precisely according to the preset flow rate or time, realizing automatic control, reducing manual intervention, and accurate weighing can reduce material waste caused by excess or deficiency, ensuring that the amount of raw materials input each time meets the production requirements. Use the vacuum feeder 304 to connect the vacuum feeder 304 to send the materials into the spiral stirring barrel 307 for stirring. The vacuum feeder 304 can form a closed conveying environment, effectively reducing the diffusion and pollution of dust, maintaining the cleanliness of the production workshop. At the same time, the materials are transported into the spiral stirring barrel 307, realizing continuous transportation and stirring of the materials, fully stirring and mixing the materials, and making the materials reach the required uniformity.

[0029] After the material enters the internal part of the screw stirring barrel, the photoelectric pair-emitting module 311 is used to control the material to enter the drying oven 310 for treatment, monitor the position of the material in real time, control the conveying speed of the material and ensure the uniform distribution of the material during the drying process, avoid material accumulation or idling, discharge the treated material into the extruder 312 for treatment. At the same time, a filter screen is installed at the connection of the drying oven 310 with the vacuum main pipe 313 and the auxiliary pipe 315 to isolate the raw materials from entering the interior of the vacuum main pipe 313, prevent the raw materials from accumulating or blocking in the vacuum pipe, and protect the normal operation of the vacuum system. The vacuum main pipe 313 is connected to the auxiliary pipe 315 to extract the gas inside the filter box. The gas output by the vacuum main pipe 313 after being filtered by the dust filter box 401 removes the dust particles therein, prevents the dust from leaking into the environment during the conveying process and causing pollution, and at the same time avoids the dust from entering the subsequent operating equipment and reducing the wear and blockage of the equipment. The gas passes through the vacuum storage cylinder 403 and is connected to the Roots vacuum pump 405 to output the gas. The vacuum storage cylinder 403 serves as a buffer device to ensure the stable air pressure in the conveying device, reduce the failure rate and maintenance cost of the vacuum pump, and ensure the smooth gas conveying. The PLC control panel is used to input the weights of various raw materials, the stirring time, the drying time and the gas discharge to realize the centralized output of the raw materials for plastic pipe production.

[0030] Through the above steps, the first electromagnetic valve 303 is adopted to control the raw materials to fall into the electronic scale storage barrel 302 for weighing, accurately control the inflow of the raw materials, so that the raw materials accurately fall into the electronic scale storage barrel 302 according to the preset flow rate or time, improve the accuracy of weighing, realize automatic control, reduce manual intervention, and the accurate weighing can reduce the material waste caused by excess or deficiency, and ensure that the amount of raw materials input each time meets the production requirements. The PLC control panel is used to input the weights of various raw materials and the stirring time to realize the four cyclic actions of automatic control of discharging, weighing, feeding, stirring and drying, and feeding into the batching storage bin. The vacuum feeder 304 is connected to the vacuum feeder 304 to send the material into the screw stirring barrel 307 for stirring. The vacuum feeder 304 can form a closed conveying environment, effectively reduce the diffusion and pollution of dust, and maintain the cleanliness of the production workshop. At the same time, the material is transported to the interior of the screw stirring barrel 307 to realize the continuous conveying and stirring of the material, fully stir and mix the material, and make the material reach the required uniformity. The PLC control panel is used to input the weights of various raw materials and the stirring time to realize the four cyclic actions of automatic control of discharging, weighing, feeding, stirring and drying, and feeding into the batching storage bin.

Claims

1. A centralized conveying device for granular raw materials used in the production of plastic pipes, comprising a raw material bin (1); characterized in that: It also includes a mobile feeding component, a conveying component, and an output component; a mobile feeding component is installed outside the raw material bin (1), a conveying component is installed at the outer end of the raw material bin (1), and an output component is installed outside the conveying component. The conveying component includes a conical blanking frame (301), an electronic scale storage barrel (302), a first electromagnetic valve (303), a vacuum suction machine (304), a vacuum suction pipe (305), a driving motor (306), a spiral stirring barrel (307), a batching bin (308), a suction pipe (309), a drying oven (310), a photoelectric pair emission module (311), an extruder (312), a vacuum main pipe (313), a second electromagnetic valve (314), and a sub-pipe (315). The conical blanking frame (301) is located at the lower end of the raw material bin (1), an electronic scale storage barrel (302) is provided below the conical blanking frame (301), a first electromagnetic valve (303) is provided between the electronic scale storage barrel (302) and the conical blanking frame (301), and a PLC control panel is provided on the outer wall of the raw material bin (1).

2. The centralized conveying device for granular raw materials used in plastic pipe production according to claim 1, characterized in that: A vacuum suction machine (304) is provided at the outer end of the electronic scale storage barrel (302), a vacuum suction pipe (305) is provided at one end of the vacuum suction machine (304), a spiral stirring barrel (307) is provided outside the raw material bin (1), and the electronic scale storage barrel (302) is communicated with the spiral stirring barrel (307) through the vacuum suction pipe (305).

3. The centralized conveying device for granular raw materials used in plastic pipe production according to claim 2, characterized in that: A batching bin (308) is provided outside the spiral stirring barrel (307), the spiral stirring barrel (307) is communicated with the batching bin (308) through the vacuum suction pipe (305), two groups of suction pipes (309) are provided at the lower end of the batching bin (308), two groups of drying ovens (310) are provided outside the batching bin (308), the two groups of suction pipes (309) pass through the drying ovens (310) and extend to the inside, an extruder (312) is provided at the lower end of the drying ovens (310), and a photoelectric pair emission module (311) is provided at the outer end of the drying ovens (310).

4. The centralized conveying device for granular raw materials used in plastic pipe production according to claim 3, wherein: A vacuum main pipe (313) is provided at the upper end of the drying ovens (310), a sub-pipe (315) is provided on one side of the drying ovens (310) away from the vacuum main pipe (313), the sub-pipe (315) is communicated with the vacuum main pipe (313), second electromagnetic valves (314) are provided at the outer ends of the sub-pipe (315) and the vacuum main pipe (313), and a filter screen is provided between the drying ovens (310) and the vacuum main pipe (313).

5. The centralized conveying device for granular raw materials used in plastic pipe production according to claim 1, characterized in that: The mobile feeding component includes a material box (201), a auger transmission pipe (202), a discharge pipe (203), and a universal wheel (204). The material box (201) is located outside the raw material bin (1), an auger transmission pipe (202) is provided inside the material box (201), a driver is provided at one end of the auger transmission pipe (202), a discharge pipe (203) is provided at the lower end of the auger transmission pipe (202), and the universal wheel (204) is located at the lower corner of the material box (201).

6. The centralized conveying device for granular raw materials used in plastic pipe production according to claim 4, characterized in that: The output component includes a dust filter box (401), an output pipe (402), a vacuum storage cylinder (403), a connecting pipe (404) and a Roots vacuum pump (405). The dust filter box (401) is located outside the drying box (310), and the dust filter box (401) is communicated with the drying box (310) through a vacuum main pipe (313).

7. A centralized conveying device for granular raw materials used in plastic pipe production according to claim 6, characterized in that: A vacuum storage cylinder (403) is provided on one side of the dust filter box (401). An output pipe (402) is provided between the vacuum storage cylinder (403) and the dust filter box (401). A connecting pipe (404) is provided at the outer end of the vacuum storage cylinder (403), and a Roots vacuum pump (405) is provided at one end of the connecting pipe (404).

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