Anti-aging PP particle raw material mixing equipment and mixing method

Abstract

The invention discloses anti-aging PP particle raw material mixing equipment and a mixing method.The mixing equipment comprises an equipment body, a hopper and a vane pump feeding module are arranged in the equipment body, a gear feeding module is installed in the hopper, and the gear feeding module comprises a meshing gear set and a driving shaft; the meshing gear set comprises a driving wheel and a driven wheel, the meshing gear set conveys solid powder raw materials downwards from a tooth gap through mutual meshing, the driving shaft is connected with the driving wheel, and the driving wheel is connected with an external motor through the driving shaft to achieve driving rotation; the vane pump feeding module comprises a vane pump and a transmission shaft, the transmission shaft is connected with a rotor of the vane pump to drive the vane pump to operate, a first transmission chain is arranged between the transmission shaft and the driving shaft, and the transmission shaft and the driving shaft are in transmission connection through the first transmission chain. And the vane pump can adjust the flow of the output liquid raw material according to the rotating speed of the driving wheel.

Description

Technical Field

[0001] The invention relates to the technical field of mixing equipment, in particular to an anti-aging PP particle raw material mixing equipment and a mixing method. Background Art

[0002] The production process of PP (polypropylene) granule raw materials mainly includes three stages: monomer polymerization, granulation and modified mixing. First, propylene monomer is polymerized under the action of a catalyst by a bulk method, a gas phase method or a slurry method to generate a basic PP resin. The bulk method has become the mainstream process due to its simple process and low energy consumption. Its core is to complete polymerization in liquid propylene, and then melt extrude it after flash evaporation to remove unreacted monomers; the gas phase method directly generates PP powder through a fluidized bed reactor, which is more flexible. Subsequently, the base resin needs to be mixed and modified with various additives, melt blended and pelletized by a twin-screw extruder, and finally form PP particles with specific properties. Among them, the mixing of PP raw materials directly determines the performance uniformity and reliability of its final product. The mixing process needs to achieve uniform dispersion of multi-scale materials from nanometer to millimeter level. If the trace additives are unevenly distributed, it will lead to accelerated local thermal oxidation aging; large-scale filler agglomeration will cause a sharp drop in mechanical properties. In addition, the directional distribution of functional additives has a significant impact on key indicators such as transparency and surface resistance. The quality of the mixing process is directly related to the product yield, life and production cost.

[0003] For the mixing of PP raw materials, the existing mixing equipment has the following shortcomings: First, traditional high-speed mixers rely on experience-based operation, and solid-solid mixing with large density differences is prone to stratification; second, when mixing solids and liquids, liquid additives are mostly added by gravity or sprayed manually, and the response lag causes ratio fluctuations, and insufficient atomization easily forms local agglomerates; third, the equipment has a low degree of intelligence, lacks real-time mixing quality monitoring and adjustment of each mixing component, and abnormal operating conditions rely on manual intervention.

[0004] In view of this, the present invention provides an anti-aging PP particle raw material mixing device and a mixing method. The present invention relates the added amount of solid powder raw material and liquid raw material to the mixing stirring speed through a three-stage linkage transmission structure, and has real-time self-adjustment capability according to the real-time raw material addition amount. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an anti-aging PP particle raw material mixing equipment and a mixing method. In the technical scheme of the present invention, the amount of solid powder raw material and liquid raw material added are associated with the mixing stirring speed through the three-stage linkage transmission structure of the mixing equipment, and it has real-time self-adjustment ability according to the real-time raw material addition amount.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a mixing device on the one hand. In the technical solution of the present invention, the mixing device includes a device body, a hopper and a vane pump feeding module are arranged inside the device body, the hopper is used to add solid powder raw materials, a gear feeding module is installed inside the hopper, the gear feeding module includes at least one pair of meshing gear sets and a driving shaft, the meshing gear set includes a driving wheel and a driven wheel, the meshing gear set realizes the downward conveying of solid powder raw materials from the tooth gap by mutual engagement, the driving shaft is connected to the driving wheel, and the driving wheel is connected to an external motor through the driving shaft to realize driving rotation; the vane pump feeding module is used to add liquid raw materials, the vane pump feeding module includes at least one set of vane pumps and a transmission shaft, the transmission shaft is connected to the rotor of the vane pump to drive the vane pump to operate, a first transmission chain is arranged between the transmission shaft and the driving shaft, and the transmission shaft and the driving shaft are connected through the first transmission chain, that is, the vane pump can adjust the output liquid raw material flow according to the rotation speed of the driving wheel in the meshing gear set.

[0007] Furthermore, in the technical solution of the present invention, a mixing cavity is also provided inside the equipment body, and the mixing cavity is located below the hopper.

[0008] Furthermore, in the technical solution of the present invention, a stirring module is also installed inside the mixing chamber to stir the solid powder raw materials and liquid raw materials entering the mixing chamber, and the stirring module includes stirring blades and a rotating shaft, and the rotating shaft is used to drive the stirring blades to rotate and stir, and a second transmission chain is arranged between the rotating shaft and the driving shaft, and the rotating shaft and the driving shaft are connected to each other through the second transmission chain, that is, the stirring module can adjust the stirring speed according to the rotation speed of the driving wheel in the meshing gear group.

[0009] Furthermore, in the technical solution of the present invention, a vibrator is also provided in the hopper to prevent the solid powder raw materials in the hopper from agglomerating and clogging.

[0010] Furthermore, in the technical solution of the present invention, the gear feeding module is installed at the lower end of the hopper, the solid powder raw material in the hopper enters the interior of the mixing chamber through the gear feeding module, the driving wheel and the driven wheel are symmetrically arranged, and the driving wheel and the driven wheel are respectively provided with a plurality of groups of gear teeth, and the driving wheel and the driven wheel transport the solid powder raw material downward through the gap between the gear teeth.

[0011] Furthermore, in the technical solution of the present invention, the vane pump feeding module is arranged on one side of the mixing chamber, and the vane pump feeding module also includes a storage bin and a discharge nozzle, the storage bin is used to store liquid raw materials, the discharge nozzle is located inside the mixing chamber, and the discharge nozzle is connected to the discharge port of the vane pump to spray the pumped liquid raw materials.

[0012] In the technical solution of the present invention, on the other hand, a mixing method is also proposed, using a mixing device according to the above, specifically comprising the following steps: S1. Add solid powder raw materials into the hopper to drive the meshing gear set to rotate. The driving wheel and the driven wheel in the meshing gear set convey the solid powder raw materials to the mixing chamber below through the gap between the gear teeth. The speed of driving the meshing gear set to rotate can be adjusted according to the amount of solid powder raw materials and environmental process conditions. S2, when the meshing gear set rotates, the rotor of the vane pump in the vane pump feeding module is driven to rotate through the first transmission chain on the driving shaft, and the vane pump is further operated. The vane pump pumps the liquid raw material inside the storage bin into the inside of the mixing cavity, and at the same time, the pumped liquid raw material is sprayed through the discharge nozzle, so that the pumped liquid raw material is sprayed onto the solid powder raw material falling from the hopper. At the same time, the vane pump can adjust the flow rate of the output liquid raw material according to the rotation speed of the meshing gear set; S3. When the meshing gear set rotates, the second transmission chain on the driving shaft drives the stirring blades in the stirring module to rotate, so as to stir the solid powder raw materials and liquid raw materials entering the mixing chamber. At the same time, the stirring module can adjust the stirring speed of the stirring blades according to the rotation speed of the meshing gear set.

[0013] Beneficial effect: In summary, the present invention provides an anti-aging PP particle raw material mixing equipment and a mixing method. In the technical scheme of the present invention, the amount of solid powder raw material and liquid raw material added are associated with the mixing stirring speed through the three-stage linkage transmission structure of the mixing equipment, the gear feeding module, the vane pump feeding module and the stirring module are associated, and the driving shaft of the meshing gear group is connected with the transmission shaft of the vane pump and the rotating shaft of the stirring blade. That is, the driving shaft of the meshing gear group can perform real-time regulation and control of the vane pump and the stirring blade according to its own operating conditions.

[0014] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of a partial structure of a mixing device of the present invention Figure 1 ; Figure 2 A schematic diagram of a partial structure of a mixing device of the present invention Figure 2 ; Figure 3 A schematic diagram of a partial structure of a mixing device of the present invention Figure 3 ; Figure 4 A schematic diagram of a partial structure of a mixing device of the present invention is shown in FIG. Figure 1 ; Figure 5 A schematic diagram of a partial structure of a mixing device of the present invention is shown in FIG. Figure 2 ; Figure 6 A schematic diagram of the use function of a partial structure of a mixing device of the present invention; In the figure: A, hopper; B, gear feeding module; B01, meshing gear set; B01-1, driving wheel; B01-2, driven wheel; B01-3, gear teeth; B02, driving shaft; C, vane pump feeding module; C01, vane pump; C02, transmission shaft; C03, first transmission chain; C04, storage bin; C05, discharge nozzle; D, mixing chamber; E, stirring module; E01, stirring blade; E02, rotating shaft; E03, second transmission chain. DETAILED DESCRIPTION

[0017] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The core of the embodiment of the present invention is to provide an anti-aging PP particle raw material mixing device and a mixing method. In the technical solution of this embodiment, the amount of solid powder raw material and liquid raw material added are associated with the mixing stirring speed through the three-stage linkage transmission structure of the mixing equipment, and it has real-time self-adjustment capabilities according to the real-time raw material addition amount.

[0019] Specifically, an embodiment of the present invention provides a mixing device, including a device body, Figure 1 and Figure 2 FIG. 1 is a partial structural diagram of a mixing device according to this embodiment, as shown in FIG. Figure 1 and Figure 2 As shown, a hopper A and a vane pump feeding module C are provided inside the main body of the equipment. The hopper A is used to add solid powder raw materials, and a gear feeding module B is installed inside the hopper A. Figure 3 FIG. 1 is a partial structural diagram of a mixing device according to this embodiment, as shown in FIG. Figure 3 As shown, the gear feeding module B includes at least one pair of meshing gear sets B01 and a drive shaft B02. Figure 4 and Figure 5 FIG. 1 is a schematic cross-sectional view of a portion of the structure of a mixing device according to this embodiment. Figure 4 and Figure 5 As shown, the meshing gear set B01 includes a driving wheel B01-1 and a driven wheel B01-2. The meshing gear set B01 realizes the downward conveying of solid powder raw materials from the tooth gap by mutual meshing. The driving shaft B02 is connected to the driving wheel B01-1, and the driving wheel B01-1 is connected to an external motor through the driving shaft B02 to realize driving rotation; the vane pump feeding module C is used to add liquid raw materials. The vane pump feeding module C includes at least one set of vane pumps C01 and a transmission shaft C02. The transmission shaft C02 is connected to the rotor of the vane pump C01 to drive the vane pump C01 to operate. A first transmission chain C03 is arranged between the transmission shaft C02 and the driving shaft B02. The transmission connection between the transmission shaft C02 and the driving shaft B02 is realized through the first transmission chain C03, that is, the vane pump C01 can be connected according to the meshing gear. The flow rate of liquid raw material output is adjusted by the rotation speed of the driving wheel B01-1 in the meshing gear group B01; it should be noted that the flow rate of liquid raw material output by the vane pump C01 adjusted according to the rotation speed of the driving wheel B01-1 in the meshing gear group B01 mainly refers to that when the rotation speed of the driving wheel B01-1 in the meshing gear group B01 is accelerated, that is, the amount of solid powder raw material entering the mixing chamber D through the hopper A increases, that is, the operation of the vane pump C01 is accelerated through the transmission shaft C02, that is, the amount of liquid raw material pumped out by the vane pump C01 increases to meet the demand for increased solid powder raw material. In this embodiment, a mixing device can have real-time self-adjustment ability according to the real-time raw material addition amount, that is, the vane pump feeding module C can adjust the flow rate of liquid raw material in real time according to the raw material input speed in the gear feeding module B.

[0020] Specifically, in this embodiment, please continue to refer to Figure 1 A mixing cavity D is also provided inside the equipment body. The mixing cavity D is located below the hopper A. The mixing cavity D refers to a mixing cavity for solid powder raw materials and liquid raw materials.

[0021] Specifically, in this embodiment, please continue to refer to Figure 3 and Figure 4 , a stirring module E is also installed inside the mixing cavity D to stir the solid powder raw materials and liquid raw materials entering the mixing cavity D, the stirring module E includes a stirring blade E01 and a rotating shaft E02, the rotating shaft E02 is used to drive the stirring blade E01 to rotate and stir, a second transmission chain E03 is arranged between the rotating shaft E02 and the driving shaft B02, and the rotating shaft E02 and the driving shaft B02 are connected by the second transmission chain E03, that is, the stirring module E can adjust the stirring speed according to the rotation speed of the driving wheel B01-1 in the meshing gear set B01. It should be noted that the stirring module E adjusts the stirring speed according to the rotation speed of the driving wheel B01-1 in the meshing gear set B01. It should be noted that when the rotation speed of the driving wheel B01-1 in the meshing gear set B01 is accelerated, that is, the solid powder raw materials entering the mixing cavity D through the hopper A increase, that is, the rotation speed of the stirring blade E01 driven by the rotating shaft E02 is accelerated, that is, the stirring speed is accelerated to meet the stirring demand brought about by the increased amount of raw materials.

[0022] Specifically, in the present embodiment, a vibrator (not shown in the figure) is further provided in the hopper A to prevent the solid powder raw materials in the hopper A from agglomerating and clogging.

[0023] Specifically, in this embodiment, please continue to refer to Figure 3 and Figure 4 , the gear feeding module B is installed at the lower end of the hopper A, and the solid powder raw material in the hopper A enters the interior of the mixing chamber D through the gear feeding module B. The driving wheel B01-1 and the driven wheel B01-2 are symmetrically arranged, and a plurality of groups of gear teeth B01-3 are respectively provided on the driving wheel B01-1 and the driven wheel B01-2. The driving wheel B01-1 and the driven wheel B01-2 convey the solid powder raw material downward through the gap between the gear teeth B01-3; it should be noted that the driving wheel B01-1 and the driven wheel B01-2 convey the solid powder raw material downward through the gap between the gear teeth B01-3 mainly refers to that when the driving wheel B01-1 and the driven wheel B01-2 rotate, the driving wheel B01-1 and the driven wheel B01-2 rotate inwardly towards each other, that is, the solid powder raw material is conveyed downward from the gap between the gear teeth B01-3 in turn.

[0024] Specifically, in this embodiment, please continue to refer to Figure 3 and Figure 4 The vane pump feeding module C is arranged on one side of the mixing chamber D. The vane pump feeding module C also includes a storage bin C04 and a discharge nozzle C05. The storage bin C04 is used to store liquid raw materials. The discharge nozzle C05 is located inside the mixing chamber D. The discharge nozzle C05 is connected to the discharge port of the vane pump C01 to spray the pumped liquid raw materials. Figure 6FIG. 1 is a schematic diagram of the use function of a partial structure of a mixing device according to this embodiment, such as Figure 6 As shown, the vane pump C01 can spray the pumped liquid raw material into the solid powder raw material falling into the mixing cavity D. Compared with the traditional mixing equipment and mixing method, the method of this embodiment has a better mixing effect.

[0025] On the other hand, this embodiment provides a mixing method, using a mixing device according to the above, which specifically includes the following steps: S1. Add solid powder raw materials into the hopper A to drive the meshing gear set B01 to rotate. The driving wheel B01-1 and the driven wheel B01-2 in the meshing gear set B01 convey the solid powder raw materials to the mixing cavity D below through the gap between the gear teeth B01-3. The speed of driving the meshing gear set B01 to rotate can be adjusted according to the amount of solid powder raw materials and environmental process conditions. S2, when the meshing gear set B01 rotates, the first transmission chain C03 on the driving shaft B02 drives the rotor of the vane pump C01 in the vane pump feeding module C to rotate, further making the vane pump C01 operate, and the vane pump C01 pumps the liquid raw material inside the storage bin C04 into the mixing cavity D, and while pumping out, the pumped liquid raw material is sprayed out through the discharge nozzle C05, so that the pumped liquid raw material is sprayed onto the solid powder raw material falling from the hopper A, and at the same time, the vane pump C01 can adjust the flow rate of the output liquid raw material according to the rotation speed of the meshing gear set B01; S3. When the meshing gear set B01 rotates, the second transmission chain E03 on the driving shaft B02 drives the stirring blade E01 in the stirring module E to rotate, so as to stir the solid powder raw materials and liquid raw materials entering the mixing cavity D. At the same time, the stirring module E can adjust the stirring speed of the stirring blade E01 according to the rotation speed of the meshing gear set B01.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mixing device, comprising a device body, characterized in that: The interior of the device body is provided with: A hopper (A) is used to add solid powder raw materials. A gear feeding module (B) is installed inside the hopper (A). The gear feeding module (B) includes at least one pair of meshing gear sets (B01) and a drive shaft (B02). The meshing gear set (B01) includes a driving wheel (B01-1) and a driven wheel (B01-2). The meshing gear set (B01) is meshed with each other to realize the downward conveyance of solid powder raw materials from the tooth gap. The drive shaft (B02) is connected to the driving wheel (B01-1). The driving wheel (B01-1) is connected to an external motor through the drive shaft (B02) to realize driving rotation. A vane pump feeding module (C) is used for adding liquid raw materials. The vane pump feeding module (C) comprises at least one vane pump (C01) and a transmission shaft (C02). The transmission shaft (C02) is connected to the rotor of the vane pump (C01) to drive the vane pump (C01) to operate. A first transmission chain (C03) is arranged between the transmission shaft (C02) and the drive shaft (B02). The transmission connection between the transmission shaft (C02) and the drive shaft (B02) is achieved through the first transmission chain (C03), that is, the vane pump (C01) can adjust the output flow rate of the liquid raw material according to the rotation speed of the driving wheel (B01-1) in the meshing gear set (B01).

2. A mixing device according to claim 1, characterized in that A mixing chamber (D) is also provided inside the main body of the equipment, and the mixing chamber (D) is located below the hopper (A).

3. A mixing device according to claim 2, characterized in that: A stirring module (E) is also installed inside the mixing cavity (D) to stir the solid powder raw materials and liquid raw materials entering the mixing cavity (D), and the stirring module (E) includes a stirring blade (E01) and a rotating shaft (E02), and a second transmission chain (E03) is arranged between the rotating shaft (E02) and the driving shaft (B02), and the rotating shaft (E02) and the driving shaft (B02) are connected to each other by transmission through the second transmission chain (E03), that is, the stirring module (E) can adjust the stirring speed according to the rotation speed of the driving wheel (B01-1) in the meshing gear set (B01).

4. A mixing device according to claim 3, characterized in that: A vibrator is also provided in the hopper (A) to prevent the solid powder raw materials in the hopper (A) from agglomerating and clogging.

5. A mixing device according to claim 4, characterized in that: The gear feeding module (B) is installed at the lower end of the hopper (A), and the solid powder raw material in the hopper (A) enters the interior of the mixing chamber (D) through the gear feeding module (B). The driving wheel (B01-1) and the driven wheel (B01-2) are symmetrically arranged, and the driving wheel (B01-1) and the driven wheel (B01-2) are respectively provided with a plurality of groups of gear teeth (B01-3). The driving wheel (B01-1) and the driven wheel (B01-2) convey the solid powder raw material downward through the gap between the gear teeth (B01-3).

6. A mixing device according to claim 5, characterized in that: The vane pump feeding module (C) is arranged on one side of the mixing chamber (D), and the vane pump feeding module (C) also includes a storage bin (C04) and a discharge nozzle (C05). The storage bin (C04) is used to store liquid raw materials, and the discharge nozzle (C05) is located inside the mixing chamber (D). The discharge nozzle (C05) is connected to the discharge port of the vane pump (C01) to spray the pumped liquid raw materials.

7. A hybrid method, characterized in that The mixing device according to claim 6 comprises the following steps: S1. Add solid powder raw materials into the hopper (A) to drive the meshing gear set (B01) to rotate. The driving wheel (B01-1) and the driven wheel (B01-2) in the meshing gear set (B01) convey the solid powder raw materials to the mixing chamber (D) below through the gap between the gear teeth (B01-3). The rotation speed of the driving meshing gear set (B01) can be adjusted according to the amount of solid powder raw materials and environmental process conditions. S2, when the meshing gear set (B01) rotates, the first transmission chain (C03) on the driving shaft (B02) drives the rotor of the vane pump (C01) in the vane pump feeding module (C) to rotate, further causing the vane pump (C01) to operate, and the vane pump (C01) pumps the liquid raw material inside the storage bin (C04) into the mixing chamber (D), and while pumping out, the pumped liquid raw material is sprayed out through the discharge nozzle (C05), so that the pumped liquid raw material is sprayed onto the solid powder raw material falling from the hopper (A), and at the same time, the vane pump (C01) can adjust the flow rate of the output liquid raw material according to the rotation speed of the meshing gear set (B01); S3. When the meshing gear set (B01) rotates, the second transmission chain (E03) on the driving shaft (B02) drives the stirring blade (E01) in the stirring module (E) to rotate, thereby stirring the solid powder raw materials and liquid raw materials entering the mixing chamber (D). At the same time, the stirring module (E) can adjust the stirring speed of the stirring blade (E01) according to the rotation speed of the meshing gear set (B01).

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