Material mixing and feeding system for PVC-U pipe production

Abstract

The utility model provides a material mixing and feeding system for PVC-U pipe production. The material mixing and feeding system comprises a raw material lifting device, a material mixing device, a cooling device, a material storage bin and a plurality of material conveying devices, a cooling device is arranged below the mixing device, a storage bin is arranged below the cooling device, raw materials are lifted by the raw material lifting device and then conveyed into the mixing device, the mixed materials are discharged into the cooling device by the mixing device, and the cooled mixed materials are discharged into the storage bin by the cooling device. A discharging port of each conveying device is communicated with a feeding port of the conical double-screw-rod extruder on the corresponding PVC-U pipe production line, a feeding port of each conveying device is communicated with the storage bin, and each conveying device conveys a mixture in the storage bin into the conical double-screw-rod extruder of the corresponding PVC-U pipe production line; the transfer work of manual bagging or trolley loading is not needed, the labor intensity is reduced, meanwhile, the harm of flying dust to the body of an operator is avoided, and the automatic production degree is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC-U pipe production equipment, in particular to a material mixing and feeding system for PVC-U pipe production. Background Art

[0002] PVC-U pipe is made of amorphous thermoplastic resin made by polymerization of vinyl chloride monomer and certain additives (such as stabilizer, lubricant, filler, etc.). In addition to additives, it is also blended with other resins to make it have obvious practical value.

[0003] The traditional PVC-U pipe production process is as follows: the required amorphous thermoplastic resin and various additives are weighed manually; the weighed amorphous thermoplastic resin and various additives are added to a mixer for mixing and stirring to form a mixture; the mixture is then added to a screw extruder for heating and extrusion to form the mixture; the formed pipe after extrusion is sequentially pulled, cut, expanded, tied and packaged to form the finished product.

[0004] Since there are multiple PVC-U pipe production lines and there is only one existing mixer, operators use bags or carts to add the mixed materials mixed by the mixer to the silo of each production line. First, the mixed materials need to be loaded into bags or carts, and then the bagged or loaded mixtures in the carts are transported to the silo of the production line, and finally the mixed materials are poured into the silo of the production line. This manual operation method results in a high labor intensity for the operators and a low degree of automated production. In addition, the multiple loading and pouring processes generate a lot of dust, which seriously threatens the health of the operators. Utility Model Content

[0005] In view of this, the utility model provides a mixing and feeding system for PVC-U pipe production to solve the problems described in the prior art.

[0006] A mixing and feeding system for PVC-U pipe production comprises a raw material lifting device, a mixing device, a cooling device, a storage bin and a plurality of feeding devices; a cooling device is arranged below the mixing device, a storage bin is arranged below the cooling device, the raw material lifting device lifts the raw material and conveys it to the mixing device, the mixing device discharges the mixed mixture into the cooling device, the cooling device discharges the cooled mixture into the storage bin, the discharge port of each feeding device is connected to the feed port of a conical twin-screw extruder on a corresponding PVC-U pipe production line, the feed port of each feeding device is connected to the storage bin, and each feeding device conveys the mixture in the storage bin to the conical twin-screw extruder of the corresponding PVC-U pipe production line.

[0007] Preferably, the feed end of the raw material lifting device is arranged on the workshop platform, the raw material lifting device and the mixing device are connected through a first conveying pipe, the raw material lifting device adds the raw materials for PVC-U pipe production into the mixing device, a first discharge pipe is arranged at the bottom of the mixing device, a first solenoid valve is arranged on the first discharge pipe, a first feed pipe is arranged on the top of the cooling device, the first discharge pipe and the first feed pipe are connected to each other, and the mixed material in the mixing device can flow into the cooling device after the first solenoid valve is opened; a second discharge pipe is arranged at the bottom of the cooling device, a second solenoid valve is arranged on the second discharge pipe, a second feed pipe is arranged on the top of the storage bin, the second discharge pipe and the second feed pipe are connected to each other; a plurality of second conveying pipes are arranged at the bottom of the storage bin, the number of the second conveying pipes is consistent with the number of conveying devices, and the outlet of each second conveying pipe is connected to the feed inlet of a conveying device.

[0008] Preferably, the feeding device includes a first negative pressure feeding assembly, a first storage tank and a first bracket, the first storage tank is installed on the first bracket, the first negative pressure feeding assembly includes a first negative pressure tank, a first feeding pipe, a first air pipe and a first negative pressure pump, the discharge end of the first negative pressure tank is connected to the feed end of the first storage tank, the first negative pressure tank is located above the first storage tank, the discharge end of the first feeding pipe is connected to the feed port of the first negative pressure tank, the feed end of the first feeding pipe is placed in the storage bin, one end of the first air pipe is connected to the air outlet of the first negative pressure tank, and the other end of the first air pipe is connected to the first negative pressure pump.

[0009] Preferably, the raw material lifting device includes a raw material warehouse, a second negative pressure feeding assembly, a second storage tank and a second bracket, the second storage tank is installed on the second bracket, the second negative pressure feeding assembly includes a second negative pressure tank, a second feed pipe, a second air pipe and a second negative pressure pump, the discharge end of the second negative pressure tank is connected to the feed end of the second storage tank, the second negative pressure tank is located above the second storage tank, the discharge end of the second feed pipe is connected to the feed port of the second negative pressure tank, the feed end of the second feed pipe is placed in the raw material warehouse, one end of the second air pipe is connected to the air outlet of the second negative pressure tank, and the other end of the second air pipe is connected to the second negative pressure pump; the first delivery pipe is arranged at the bottom of the second storage tank, and a third solenoid valve is arranged on the first delivery pipe. After the third solenoid valve is opened, the raw material in the second storage tank is discharged into the mixing device.

[0010] Preferably, the mixing device includes a third bracket, a vertical tank and a first motor, the third bracket is located below the second bracket, the vertical tank and the first motor are both arranged on the third bracket, the vertical tank is located directly below the second storage tank, the feed port of the vertical tank is located at the top of the vertical tank, the discharge port of the second storage tank is located at the bottom of the second storage tank, the feed port of the vertical tank and the discharge port of the second storage tank are connected through a first conveying pipe, the first motor is located on one side of the vertical tank, a first stirring impeller is arranged in the vertical tank, the rotating shaft of the first stirring impeller extends in the vertical direction, and the first motor and the first stirring impeller in the vertical tank are connected through gears or belts.

[0011] Preferably, the cooling device includes a horizontal tank and a stirring assembly, the horizontal tank includes an outer shell and an inner shell, the inner shell is arranged in the outer shell, a cavity is formed between the inner shell and the outer shell, a liquid inlet pipe is arranged on the outer shell, the liquid inlet pipe and the cavity are connected, and the first feed pipe is connected to the inner shell after passing through the outer shell; the stirring assembly includes a left stirring impeller, a right stirring impeller, a rotating shaft and a second motor, the left stirring impeller and the right stirring impeller are symmetrically arranged on the rotating shaft, the rotating shaft is transversely arranged in the inner shell, one end of the rotating shaft is connected to the second motor, the second discharge pipe is connected to the bottom of the inner shell, and the second discharge pipe is arranged at a position between the left stirring impeller and the right stirring impeller where they are close to each other.

[0012] In the mixing and feeding system for the production of the PVC-U pipe, the raw material is lifted by the raw material lifting device and then added to the mixing device, and then the raw materials are evenly mixed in the mixing device to form a mixture, and the mixing device discharges the evenly mixed mixture into the cooling device for cooling, and the cooled mixture is again discharged by the cooling device into the storage bin, and each feeding device conveys the mixture in the storage bin to the conical twin-screw extruder of the corresponding PVC-U pipe production line. In the above system, the mixture can be automatically added to the conical twin-screw extruder of each PVC-U pipe production line, without the need for manual bagging or transportation by loading into a trolley, which reduces the labor intensity, avoids the physical harm of the operator caused by dust, and also improves the degree of automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a stereogram of the utility model.

[0014] Figure 2 It is a front view of the utility model after partial assembly.

[0015] Figure 3 yes Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0016] Figure 4 It is a right side view of the utility model after partial assembly.

[0017] Figure 5 yes Figure 4Three-dimensional cross-sectional view at the middle BB.

[0018] Figure 6 It is a three-dimensional diagram of the feeding device.

[0019] In the figure: a raw material lifting device 10, a raw material bin 11, a second negative pressure feeding assembly 12, a second negative pressure tank 121, a second material delivery pipe 122, a second air delivery pipe 123, a second negative pressure pump 124, a second storage tank 13, a second bracket 14, a mixing device 20, a first discharge pipe 21, a first solenoid valve 22, a third bracket 23, a vertical tank 24, a first motor 25, a cooling device 30, a first feed pipe 31, a second discharge pipe 32, a second solenoid valve 33, a horizontal tank 34, a housing 341, an inlet Liquid pipe 3411, inner shell 342, cavity 343, stirring assembly 35, left stirring impeller 351, right stirring impeller 352, rotating shaft 353, second motor 354, storage bin 40, second feeding pipe 41, second conveying pipe 42, feeding device 50, first negative pressure feeding assembly 51, first negative pressure tank 511, first conveying pipe 512, first air pipe 513, first negative pressure pump 514, first storage tank 52, first bracket 53, first stirring impeller 26, first conveying pipe 60. DETAILED DESCRIPTION

[0020] The technical solution and technical effects of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0021] Please see Figures 1 to 6 The mixing and feeding system for PVC-U pipe production includes a raw material lifting device 10, a mixing device 20, a cooling device 30, a storage bin 40 and a plurality of feeding devices 50; the cooling device 30 is arranged below the mixing device 20, and the storage bin 40 is arranged below the cooling device 30. The mixed material of the mixing device 20 is discharged to the cooling device 30 by the principle of self-weight, and the mixed material cooled in the cooling device is discharged into the storage bin 40 by the principle of self-weight. The raw material lifting device 10 lifts the raw material and transports it to the mixing device 20. 0, the mixing device 20 discharges the mixed mixture into the cooling device 30, the cooling device 30 discharges the cooled mixture into the storage bin 40, the discharge port of each feeding device 50 is connected to the feed port of the conical twin-screw extruder 200 on the corresponding PVC-U pipe production line, the feed port of each feeding device 50 is connected to the storage bin 40, and each feeding device 50 conveys the mixture in the storage bin 40 to the conical twin-screw extruder 200 of the corresponding PVC-U pipe production line.

[0022] Furthermore, the feed end of the raw material lifting device 10 is arranged on the workshop platform, the raw material lifting device 10 and the mixing device 20 are connected through the first conveying pipe 60, the raw material lifting device 10 adds the raw material for PVC-U pipe production into the mixing device 20, the first discharge pipe 21 is arranged at the bottom of the mixing device 20, the first solenoid valve 22 is arranged on the first discharge pipe 21, the first feed pipe 31 is arranged on the top of the cooling device 30, the first discharge pipe 21 and the first feed pipe 31 are connected to each other, and the first solenoid valve 22 can be opened to The mixed material in the mixing device 20 flows into the cooling device 30; a second discharge pipe 32 is arranged at the bottom of the cooling device 30, a second solenoid valve 33 is arranged on the second discharge pipe 32, a second feed pipe 41 is arranged at the top of the storage bin 40, and the second discharge pipe 32 and the second feed pipe 41 are connected to each other; a plurality of second conveying pipes 42 are arranged at the bottom of the storage bin 40, the number of the second conveying pipes 42 is consistent with the number of the conveying devices 50, and the outlet of each second conveying pipe 42 is connected to the feed port of a conveying device 50.

[0023] Furthermore, the feeding device 50 includes a first negative pressure feeding assembly 51, a first storage tank 52 and a first bracket 53. The first storage tank 52 is installed on the first bracket 53. The first negative pressure feeding assembly 51 includes a first negative pressure tank 511, a first feeding pipe 512, a first air pipe 513 and a first negative pressure pump 514. The discharge end of the first negative pressure tank 511 is connected to the feed end of the first storage tank 52. The first negative pressure tank 511 is located above the first storage tank 52. The discharge end of the first feeding pipe 512 is connected to the feed port of the first negative pressure tank 511. The feed end of the first feeding pipe 512 is placed in the storage bin 40. One end of the first air pipe 513 is connected to the air outlet of the first negative pressure tank 511, and the other end of the first air pipe 513 is connected to the first negative pressure pump 514. The first negative pressure pump 514 works to form negative pressure in the first negative pressure tank 511 and the first delivery pipe 512. After the feed port of the first delivery pipe 512 forms negative pressure, the mixed material in the storage bin 40 continuously enters the first delivery pipe 512, and the mixed material enters the first negative pressure tank 511 along the first delivery pipe 512. The mixed material in the first negative pressure tank 511 enters the first storage tank 52 again. The structure and working principle of the delivery device 50 are the same as those of the Chinese application No. 202222421096.1, and will not be described in detail here.

[0024] Furthermore, the raw material lifting device 10 includes a raw material bin 11, a second negative pressure feeding assembly 12, a second storage tank 13 and a second bracket 14, the second storage tank 13 is installed on the second bracket 14, the second negative pressure feeding assembly 12 includes a second negative pressure tank 121, a second material delivery pipe 122, a second air delivery pipe 123 and a second negative pressure pump 124, the discharge end of the second negative pressure tank 121 is connected to the feed end of the second storage tank 13, the second negative pressure tank 121 is located above the second storage tank 13, and the second material delivery pipe 122 is connected to the feed end of the second storage tank 13. 2 is connected to the feed port of the second negative pressure tank 121, the feed end of the second delivery pipe 122 is placed in the raw material warehouse 11, one end of the second air delivery pipe 123 is connected to the air outlet of the second negative pressure tank 121, and the other end of the second air delivery pipe 123 is connected to the second negative pressure pump 124; the first delivery pipe 60 is arranged at the bottom of the second storage tank 13, and the third solenoid valve 61 is arranged on the first delivery pipe 60. After the third solenoid valve 61 is opened, the raw materials in the second storage tank 13 are discharged into the mixing device 20. The second negative pressure pump 124 works to sequentially form negative pressure in the second air pipe 123, the second negative pressure tank 121, and the second material pipe 122. The raw materials in the raw material warehouse 11 enter the second material pipe 122 under negative pressure, and enter the second negative pressure tank 121 along the second material pipe 122. The connecting point between the second material pipe 122 and the second negative pressure tank 121 is lower than the connecting point between the second air pipe 123 and the second negative pressure tank 121, so that the raw materials enter the second negative pressure tank 121 and first fall to the bottom of the second negative pressure tank 121 due to their own weight.

[0025] Further, the mixing device 20 includes a third bracket 23, a vertical tank 24 and a first motor 25. The third bracket 23 is located below the second bracket 14. The vertical tank 24 and the first motor 25 are both arranged on the third bracket 23. The vertical tank 24 is located directly below the second storage tank 13. The feed port of the vertical tank 24 is located at the top of the vertical tank 24. The discharge port of the second storage tank 13 is located at the bottom of the second storage tank 13. The feed port of the vertical tank 24 and the discharge port of the second storage tank 13 are connected through a first conveying pipe 60. The first motor 25 is located on one side of the vertical tank 24. A first stirring impeller 26 is arranged in the vertical tank 24. The extension direction of the rotating shaft 353 of the first stirring impeller 26 is vertical. The first motor 25 and the first stirring impeller 26 in the vertical tank 24 are connected through gears or belts. The first motor 25 drives the first stirring impeller 26 to rotate rapidly to mix the various raw materials in the vertical tank 24 evenly, and generates heat during the stirring process to melt the wax in the raw materials. The melted wax is easier to achieve the effect of even mixing.

[0026] Furthermore, the cooling device 30 includes a horizontal tank 34 and a stirring assembly 35. The horizontal tank 34 includes an outer shell 341 and an inner shell 342. The horizontal tank 34 refers to a tank body placed horizontally. The inner shell 342 is arranged in the outer shell 341. A cavity 343 is formed between the inner shell 342 and the outer shell 341. A liquid inlet pipe 3411 is arranged on the outer shell 341. The liquid inlet pipe 3411 is connected to the cavity 343. The coolant is injected into the cavity 343 through the liquid inlet pipe 3411 to the inner shell 342. The mixed material in the cooling device is cooled, and the first feeding pipe 31 passes through the outer shell 341 and is connected to the inner shell 342; the stirring assembly 35 includes a left stirring impeller 351, a right stirring impeller 352, a rotating shaft 353 and a second motor 354, the left stirring impeller 351 and the right stirring impeller 352 are symmetrically arranged on the rotating shaft 353, the rotating shaft 353 is transversely arranged in the inner shell 342, one end of the rotating shaft 353 is connected to the second motor 354, and the second discharge pipe 32 and the inner shell 34 2, the second discharge pipe 32 is arranged at a position between the left stirring impeller 351 and the right stirring impeller 352 where they are close to each other; when the second motor drives the rotating shaft 353 to rotate clockwise, the left stirring impeller 351 pushes the mixed material entering the inner shell 342 from the first feeding pipe 31 toward the left side of the horizontal tank 34, and the right stirring impeller 352 pushes the mixed material entering the inner shell 342 from the first feeding pipe 31 toward the right side of the horizontal tank 34, so that the mixed material is spread and contacts with the inner shell 342 for heat dissipation; when the second motor drives the rotating shaft 353 to rotate counterclockwise, the left stirring impeller 351 pushes the mixed material in the inner shell 342 toward the middle of the horizontal tank 34, and the right stirring impeller 352 pushes the mixed material in the inner shell 342 toward the middle of the horizontal tank 34. At this time, the second discharge pipe 32 is opened, and the mixed material in the inner shell 342 is discharged into the storage bin 40 in the process of the left stirring impeller 351 and the right stirring impeller 352 gathering the mixed material toward the middle.

Claims

1. A mixing and feeding system for PVC-U pipe production, characterized in that: It includes a raw material lifting device, a mixing device, a cooling device, a storage bin and multiple feeding devices; a cooling device is arranged below the mixing device, a storage bin is arranged below the cooling device, the raw material lifting device lifts the raw material and conveys it to the mixing device, the mixing device discharges the mixed mixture into the cooling device, the cooling device discharges the cooled mixture into the storage bin, the discharge port of each feeding device is connected to the feed port of a corresponding conical twin-screw extruder on a PVC-U pipe production line, the feed port of each feeding device is connected to the storage bin, and each feeding device conveys the mixture in the storage bin to the conical twin-screw extruder of the corresponding PVC-U pipe production line.

2. The mixing and feeding system for PVC-U pipe production according to claim 1, characterized in that: The feeding end of the raw material lifting device is arranged on the workshop platform, the raw material lifting device and the mixing device are connected through a first conveying pipe, the raw material lifting device adds the raw materials for PVC-U pipe production into the mixing device, a first discharge pipe is arranged at the bottom of the mixing device, a first solenoid valve is arranged on the first discharge pipe, a first feed pipe is arranged on the top of the cooling device, the first discharge pipe and the first feed pipe are connected with each other, and the mixed material in the mixing device can flow into the cooling device after the first solenoid valve is opened; a second discharge pipe is arranged at the bottom of the cooling device, a second solenoid valve is arranged on the second discharge pipe, a second feed pipe is arranged on the top of the storage bin, the second discharge pipe and the second feed pipe are connected with each other; a plurality of second conveying pipes are arranged at the bottom of the storage bin, the number of the second conveying pipes is consistent with the number of the conveying devices, and the outlet of each second conveying pipe is connected with the feed inlet of a conveying device.

3. The mixing and feeding system for PVC-U pipe production according to claim 2, characterized in that: The feeding device includes a first negative pressure feeding assembly, a first storage tank and a first bracket. The first storage tank is installed on the first bracket. The first negative pressure feeding assembly includes a first negative pressure tank, a first feeding pipe, a first air pipe and a first negative pressure pump. The discharge end of the first negative pressure tank is connected to the feed end of the first storage tank. The first negative pressure tank is located above the first storage tank. The discharge end of the first feeding pipe is connected to the feed port of the first negative pressure tank. The feed end of the first feeding pipe is placed in the storage bin. One end of the first air pipe is connected to the air outlet of the first negative pressure tank, and the other end of the first air pipe is connected to the first negative pressure pump.

4. The mixing and feeding system for PVC-U pipe production according to claim 1, characterized in that: The raw material lifting device includes a raw material warehouse, a second negative pressure feeding assembly, a second storage tank and a second bracket. The second storage tank is installed on the second bracket. The second negative pressure feeding assembly includes a second negative pressure tank, a second feed pipe, a second air pipe and a second negative pressure pump. The discharge end of the second negative pressure tank is connected to the feed end of the second storage tank. The second negative pressure tank is located above the second storage tank. The discharge end of the second feed pipe is connected to the feed port of the second negative pressure tank. The feed end of the second feed pipe is placed in the raw material warehouse. One end of the second air pipe is connected to the air outlet of the second negative pressure tank, and the other end of the second air pipe is connected to the second negative pressure pump. The first delivery pipe is arranged at the bottom of the second storage tank. A third solenoid valve is arranged on the first delivery pipe. After the third solenoid valve is opened, the raw material in the second storage tank is discharged into the mixing device.

5. The mixing and feeding system for PVC-U pipe production according to claim 4, characterized in that: The mixing device includes a third bracket, a vertical tank and a first motor. The third bracket is located below the second bracket. The vertical tank and the first motor are both arranged on the third bracket. The vertical tank is located directly below the second storage tank. The feed port of the vertical tank is located at the top of the vertical tank. The discharge port of the second storage tank is located at the bottom of the second storage tank. The feed port of the vertical tank and the discharge port of the second storage tank are connected through a first conveying pipe. The first motor is located on one side of the vertical tank. A first stirring impeller is arranged in the vertical tank. The extension direction of the rotating shaft of the first stirring impeller is vertical. The first motor and the first stirring impeller in the vertical tank are connected through gears or belts.

6. The mixing and feeding system for PVC-U pipe production according to claim 5, characterized in that: The cooling device includes a horizontal tank and a stirring assembly. The horizontal tank includes an outer shell and an inner shell. The inner shell is arranged in the outer shell. A cavity is formed between the inner shell and the outer shell. A liquid inlet pipe is arranged on the outer shell. The liquid inlet pipe is connected to the cavity. The first feed pipe is connected to the inner shell after passing through the outer shell; the stirring assembly includes a left stirring impeller, a right stirring impeller, a rotating shaft and a second motor. The left stirring impeller and the right stirring impeller are symmetrically arranged on the rotating shaft. The rotating shaft is transversely arranged in the inner shell. One end of the rotating shaft is connected to the second motor. The second discharge pipe is connected to the bottom of the inner shell. The second discharge pipe is arranged at a position between the left stirring impeller and the right stirring impeller where they are close to each other.

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