A production device for high melt index polypropylene

Abstract

The utility model discloses a kind of for high melt index polypropylene production device, it relates to high melt index polypropylene production technical field, the for high melt index polypropylene production device, including powder buffer bin, for the temporary storage and conveying of polypropylene powder, it is characterized by: the upper portion of powder buffer bin inner cavity is vertically provided with barrel, the inside of barrel is vertically slidably arranged sliding tube, and the bottom of sliding tube is connected with splash bin, the bottom eccentricity of splash bin inner cavity is equipped with splash tray, splash tray is driven by driving structure, for the powder into the splash bin is thrown and scattered outward.This scheme is rotated and vertically reciprocatingly moved by barrel driving splash bin, cooperate and scatter powder, annular reinforcing plate crushes agglomerate and pushes away material plate scrapes material, can effectively solve the accumulation agglomerate of high melt index polypropylene powder in buffer bin, dispersion is uneven, bin wall residual and poor feeding problem, guarantee subsequent granulating device feeding stability, improve production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of high melt flow index polypropylene production technology, and in particular to a device for producing high melt flow index polypropylene. Background Technology

[0002] In the production of high melt flow index polypropylene, the powder generated by the polymerization reaction needs to be temporarily stored in a powder buffer silo before being conveyed to the extrusion granulation unit via a discharge pipe and a feeding auger. However, high melt flow index polypropylene powder has a fine particle size, large specific surface area, and strong interparticle adhesion, which presents significant drawbacks to traditional powder buffer silos. Firstly, since the powder falls vertically from a single feed inlet, it tends to accumulate and clump in the silo, and its dispersion is uneven, resulting in fluctuations in the feed rate of the granulation unit and affecting the stability of the finished product quality. Secondly, the clumped powder tends to form a "bridge" at the discharge pipe inlet, causing the feeding auger to be obstructed, and even causing the granulation unit to run out of material, requiring shutdown for cleaning and reducing production efficiency. Utility Model Content

[0003] This utility model provides a high melt index polypropylene production device, including a powder buffer silo for temporary storage and conveying of polypropylene powder. A material cylinder is vertically arranged above the inner cavity of the powder buffer silo, and a sliding cylinder is vertically slidably arranged inside the material cylinder. A splash chamber is connected to the bottom of the sliding cylinder. A splash plate is eccentrically arranged at the bottom of the inner cavity of the splash chamber. The splash plate is driven by a drive structure and is used to throw the powder entering the splash chamber outward.

[0004] Preferably, the outer surface of the material cylinder is provided with a sliding cylinder, wherein the material cylinder and the sliding cylinder are movably connected by a reciprocating screw drum.

[0005] Preferably, a connecting sleeve is movably connected to the bottom of the sliding cylinder, and the bottom of the sliding cylinder is connected to the connecting sleeve and the splash chamber on opposite sides.

[0006] Preferably, a discharge trough is provided through the outer side of the splash chamber, and there are multiple discharge troughs that are evenly and symmetrically arranged on the outer surface of the splash chamber; A flow guide ring plate is installed at the bottom of the splash chamber, and the flow guide ring plate is used in conjunction with the splash disk.

[0007] Preferably, the bottom of the splash chamber is provided with a lower partition plate, which is used to install a drive structure for driving the splash disk. A slip ring is connected to the bottom of the splash chamber and the top of the lower partition plate, wherein the top of the lower partition plate is provided with a circular slip ring groove.

[0008] Preferably, the drive structure is a dual-axis motor; an annular reinforcing plate is embedded in the inner cavity of the powder buffer bin surface, and the annular reinforcing plate is used to increase the structural strength of the powder buffer bin.

[0009] Preferably, a conical guide plate is provided at the bottom of the inner cavity of the powder buffer bin, with its tip pointing downwards, and a rotating shaft is connected to the output end of the dual-axis motor on the lower side. A connecting rod is connected to the bottom of the surface of the rotating shaft, and a feeding plate is fixedly connected to the other end of the connecting rod.

[0010] Preferably, the top of the material cylinder is rotatably provided with a movable tube, and the top of the movable tube is connected to a feed hopper.

[0011] Preferably, a first gear is sleeved on the surface of the material cylinder, and a second gear is meshed with one side of the first gear, which is driven by a reduction motor.

[0012] Preferably, the bottom of the powder buffer bin is conical, and its output end is connected to a discharge pipe. A feeding auger is horizontally arranged inside the discharge pipe, and the feeding auger is driven by a drive motor installed on the outside of the discharge pipe.

[0013] This utility model provides an apparatus for producing high melt flow index polypropylene, which, compared with the prior art: This invention utilizes a rotating material cylinder in conjunction with a reciprocating auger to drive a vertically reciprocating slide cylinder, which in turn causes the splash bin to move up and down while rotating. Combined with the eccentric splash disc's spraying action and the guiding ring plate's direction, the powder spraying range is significantly expanded. The annular reinforcing plate's crushing effect on agglomerated materials further enhances powder dispersion, effectively preventing agglomeration and ensuring subsequent processing quality. A dual-shaft motor synchronously drives the splash disc and the feeding plate, simplifying the drive structure and improving power utilization efficiency. The scraping action of the feeding plate against the conical guide plate prevents material accumulation and ensures smooth material feeding. The limiting sleeve and limiting rod, slip ring and slip ring groove structures enhance the stability of each component's movement, reducing operational malfunctions. The annular reinforcing plate also improves the structural strength of the powder buffer bin, and the feeding auger ensures stable material delivery to the extrusion granulation unit, comprehensively improving the continuity and reliability of high melt flow index polypropylene production. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic front sectional view of the overall structure of an embodiment of the present utility model; Figure 3 This is a top view of the overall structure of an embodiment of the present utility model; Figure 4 This is an embodiment of the present utility model. Figure 3 Schematic diagram of cross section at point AA along the middle edge; Figure 5 This is a schematic diagram of the assembly of the material cylinder, movable tube, feed hopper, gear one, and gear two in an embodiment of this utility model. Figure 6 This is a front sectional view of the structure of the movable tube, the movable tube and the feed hopper in an embodiment of the present utility model; Figure 7 This is a three-dimensional sectional view of the structure of the material cylinder, movable tube, feed hopper, gear one, and gear two in an embodiment of this utility model. Figure 8 This is a schematic diagram of the structural assembly of the slide cylinder, connecting sleeve, sliding cylinder and splash chamber according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the assembly of the dual-axis motor, splash disk, and rotating shaft structure according to an embodiment of the present invention; Figure 10 This is a top sectional view of the sliding cylinder and material cylinder structure according to an embodiment of the present invention.

[0016] Reference numerals: 100, Powder buffer bin; 110, Discharge pipe; 120, Annular reinforcing plate; 130, Conical guide plate; 200, Material cylinder; 210, Movable pipe; 220, Feed hopper; 230, Gear 1; 240, Gear 2; 300, Sliding cylinder; 310, Reciprocating screw drum; 320, Limiting sleeve; 321, Limiting rod; 330, Connecting sleeve; 340, Sliding cylinder; 350, Splash bin; 351, Discharge chute; 400, Lower partition plate; 410, Slip ring; 420, Dual-shaft motor; 430, Splash disc; 440, Rotating shaft; 450, Material feeding plate; 451, Connecting rod; 500, Feeding auger. Detailed Implementation

[0017] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] Please refer to Figures 1 to 10 This utility model provides a high melt index polypropylene production device, including a powder buffer silo 100 for temporary storage and conveying of polypropylene powder. Its output end is connected to the input end of the extrusion granulation device through a discharge pipe 110. A material cylinder 200 is vertically arranged above the inner cavity of the powder buffer silo 100. To feed the material in the polymerization reactor into the material cylinder 200, the top of the material cylinder 200 extends to the outside of the powder buffer silo 100. The connection between the material cylinder 200 and the powder buffer silo 100 is movably connected by a sealed bearing. The top of the material cylinder 200 is rotatably provided with a movable pipe 210, and the top of the movable pipe 210 is connected to a feed hopper 220. The top of the feed hopper 220 is connected to the output end of the polymerization reactor through a pipe.

[0019] Specifically, a support is fitted on the outer surface of the movable tube 210, and the legs at the bottom of the support are connected to the top of the powder buffer hopper 100.

[0020] To drive the material cylinder 200, a gear 230 is fitted on the surface of the material cylinder 200, and a gear 240 is meshed on one side of the gear 230. The gear 240 is driven by a geared motor. The geared motor is installed on the top of the powder buffer silo 100, and a motor cover is fitted on the outside of the geared motor to protect it. Therefore, when the geared motor is working, it can drive the material cylinder 200 to rotate through the gear 240 and the gear 230.

[0021] To make gear 240 rotate with the barrel 200, such as Figure 10 As shown, the surface of gear 240 is connected with a protrusion, and the inner surface of the barrel 200 is vertically provided with a groove. The protrusion extends into the groove and can slide vertically inside the groove. Under the action of the protrusion and the groove, the sliding cylinder 340 can rotate with the barrel 200 when it rotates.

[0022] A sliding cylinder 340 is vertically slidably arranged on the inner side of the material cylinder 200, and a sliding cylinder 300 is provided on the outer surface of the material cylinder 200. The material cylinder 200 and the sliding cylinder 300 are movably connected by a reciprocating screw 310. The reciprocating screw 310 works with the material cylinder 200 as a drive source to control the vertical reciprocating movement of the sliding cylinder 300 on the surface of the material cylinder 200.

[0023] Specifically, the reciprocating screw 310 is a reciprocating screw, and the reciprocating screw 310 is fixedly embedded on the outer surface of the barrel 200. When the barrel 200 rotates, it can drive the slide 300 to move up and down on the surface of the barrel 200.

[0024] Specifically, the reciprocating screw 310 is a reciprocating screw rod with continuous and parameter-matched reciprocating helical grooves on its surface. The groove walls are precision-ground to reduce sliding friction resistance and ensure smooth vertical transmission. In terms of connection, the reciprocating screw 310 is fixedly embedded in the outer surface of the cylinder 200 using high-strength welding or countersunk bolt fastening, and its axis is completely coincident with the central axis of the cylinder 200, achieving synchronous rotation with the cylinder 200. Simultaneously, the reciprocating screw 310 is sleeved on... The outer side of the material cylinder 200 forms a movable transmission connection with the slide cylinder 300. The inner wall of the slide cylinder 300 has an integrally formed inner protrusion that engages with the reciprocating spiral groove. This inner protrusion can slide along the trajectory of the reciprocating spiral groove. Its function is to serve as a core transmission component. When the material cylinder 200 rotates under the drive of the geared motor, gear 230, and gear 240, it synchronously drives the fixedly embedded reciprocating wire cylinder 310 to rotate. The reciprocating spiral groove on the surface of the reciprocating wire cylinder 310 interacts with the inner protrusion on the inner wall of the slide cylinder 300. In coordination with the material cylinder 200, the rotational motion of the material cylinder 300 is converted into vertical reciprocating movement of the slide cylinder 300 along the surface of the material cylinder 200. This, in turn, drives the sliding cylinder 340 and the splash chamber 350 at the bottom to reciprocate vertically via the connecting sleeve 330 connected movably to the bottom of the slide cylinder 300. This, combined with the rotation of the splash chamber 350 driven by the material cylinder 200 and the throwing action of the splash plate 430, significantly expands the powder's throwing range within the powder buffer chamber 100, preventing powder accumulation. Simultaneously, the reciprocating drum 310 precisely... The spiral groove structure ensures the consistency of the reciprocating stroke of the slide cylinder 300. Combined with the auxiliary limiting of the top limiting sleeve 320 and the limiting rod 321 on the outer surface of the slide cylinder 300, it further enhances the stability of the movement of the slide cylinder 300 and the splash chamber 350, ensuring the effective dispersion of powder by the splash disc 430, effectively preventing powder agglomeration, and providing a stable material state for the subsequent powder to fall to the bottom of the powder buffer chamber 100 via the conical guide plate 130 and be conveyed to the extrusion granulation device by the feeding auger 500. The reciprocating screw is existing technology and will not be described in detail in this solution.

[0025] The bottom of the slide cylinder 300 is movably connected to a connecting sleeve 330. The connection between the connecting sleeves 330 and the connecting sleeve 330 can be a bearing connection, or an annular sliding plate can be connected to the bottom of the slide cylinder 300. The connecting sleeve 330 has a concave annular groove, and the annular plate extends into the inner cavity of the annular groove, so that the slide cylinder 300 and the connecting sleeve 330 are movably connected. like Figure 8 As shown, the bottom of the sliding cylinder 340 is connected to the opposite side of the connecting sleeve 330 and the splash chamber 350.

[0026] To increase the stability of the sliding cylinder 300, a limiting sleeve 320 is fitted on the top of the outer surface of the sliding cylinder 300, and multiple limiting rods 321 are provided through the surface of the limiting sleeve 320. The end of the limiting rod 321 that connects with the limiting sleeve 320 is in sliding contact, and the top of the limiting rod 321 is connected to the top of the inner cavity of the powder buffer bin 100. When the sliding cylinder 300 is moved under force, the limiting sleeve 320 slides on the surface of the vertically set limiting rod 321, thereby increasing the stability of the sliding cylinder 300 when it moves.

[0027] The bottom of the sliding cylinder 340 is connected to the splash chamber 350. The bottom of the inner cavity of the splash chamber 350 is eccentrically provided with a splash disk 430. The splash disk 430 is driven by a drive structure and is used to throw the powder entering the splash chamber 350 outward, thereby increasing the dispersion of the powder after the polymerization reaction and preventing the powder from clumping in the powder buffer chamber 100.

[0028] In practical applications, a discharge trough 351 is provided through the outer side of the splash chamber 350, and there are multiple discharge troughs 351 that are evenly and symmetrically provided on the outer surface of the splash chamber 350. like Figure 7 and Figure 8 As shown, a guide ring plate is installed at the bottom of the inner cavity of the splash chamber 350. The guide ring plate is used in conjunction with the splash plate 430. The guide ring plate is set at an angle, with its high point flush with the discharge trough 351, and its bottom point flush with the splash plate 430.

[0029] The bottom of the splash chamber 350 is provided with a lower partition 400, which is used to install the drive structure for driving the splash disk 430. A slip ring 410 is connected to the bottom of the splash chamber 350 and the top of the lower partition 400. The top of the lower partition 400 has an annular slip ring groove, and the slip ring 410 extends into the inner cavity of the slip ring groove and slides in contact with its surface. In this way, when the splash chamber 350 rotates, the lower partition 400 can be prevented from rotating with the splash chamber 350 by the action of the slip ring 410 and the slip ring groove.

[0030] In practical use, to prevent the lower partition 400 from rotating with the splash chamber 350, a support rod can be installed on the surface of the lower partition 400. A slider is connected to the side of the support rod away from the lower partition 400, and a vertical groove is opened on the inner side of the powder buffer chamber 100 to cooperate with the slider. The slider extends into the inner cavity of the vertical groove to increase the stability of the slider movement. Thus, under the action of the support rod and slider on the lower partition 400 and the vertical groove opened on the surface of the powder buffer chamber 100, the lower partition 400 can be prevented from rotating with the splash chamber 350 without interfering with the movement of the splash chamber 350.

[0031] Specifically, the drive structure is a dual-axis motor 420, and the fixed end of the dual-axis motor 420 is fastened to the bottom of the lower partition 400 with bolts. The bottom of the lower partition 400 and the outside of the dual-axis motor 420 are provided with an anti-slip cover, and the top of the anti-slip cover is connected to the bottom of the lower partition 400. The protective cover can protect the dual-axis motor 420.

[0032] Specifically, in this solution, the splash disk 430 is eccentrically positioned at the bottom of the inner cavity of the splash chamber 350. When the dual-axis motor 420 rotates, it can drive the splash disk 430 to rotate. The powder entering the splash chamber 350 can flow to the splash disk 430 under the action of the guide ring plate. The eccentrically rotating splash disk 430 drives the powder on its surface to be thrown outward through the discharge chute 351. Among them, an annular reinforcing plate 120 is embedded in the inner cavity of the powder buffer bin 100. The annular reinforcing plate 120 is used to increase the structural strength of the powder buffer bin 100. In the splash bin 350, the powder is thrown outward through the splash disk 430. The thrown powder hits the annular reinforcing plate 120, which can crush the agglomerated material and increase the material dispersion effect.

[0033] In this design, the dual-axis motor 420 can drive not only the splash plate 430, but also the rotating shaft 440.

[0034] like Figure 2 , Figure 7 and Figure 9 As shown, a conical guide plate 130 is provided at the bottom of the inner cavity of the powder buffer bin 100, with its tip pointing downwards. The output end of the dual-axis motor 420 is connected to a rotating shaft 440. A connecting rod 451 is connected to the bottom of the surface of the rotating shaft 440. The other end of the connecting rod 451 is fixedly connected to a material scraping plate 450. The material scraping plate 450 and the inner side of the conical guide plate 130 are in sliding contact. Thus, the material after being scattered and dispersed falls to the bottom of the inner cavity of the powder buffer bin 100 through the conical guide plate 130. The material scraping plate 450 is used to scrape the material on the surface of the conical guide plate 130.

[0035] like Figure 2 and Figure 4 As shown, the bottom of the powder buffer silo 100 is conical, and its output end is connected to the discharge pipe 110. A feeding auger 500 is horizontally arranged inside the discharge pipe 110. The feeding auger 500 is driven by a drive motor installed on the outside of the discharge pipe 110. Therefore, the material that enters the bottom of the inner cavity of the powder buffer silo 100 after dispersion can be conveyed outward under the action of the feeding auger 500 until it enters the subsequent extrusion granulation device for processing.

[0036] In practical use, the geared motor, dual-axis motor 420, and drive motor of the feeding auger 500 in this solution are all electrically connected to the controller and uniformly controlled by the controller. A material level sensor is installed inside the powder buffer silo 100. The controller can receive sensor signals such as the material level inside the powder buffer silo 100 and control the start / stop and speed of the geared motor as needed to adjust the rotation speed of the material cylinder 200 and change the rotation frequency of the splash bin 350; synchronously adjust the speed of the dual-axis motor 420 to control the throwing force of the splash disc 430 and the scraping rate of the material feeding plate 450; and control the drive motor of the feeding auger 500 according to the material level to match the conveying volume, achieving linkage between all links and ensuring stable powder dispersion and conveying. The electrical control involved in this solution is existing technology; therefore, it will not be described in detail here.

[0037] In the actual production process of high melt index polypropylene, the output end of the polymerization reactor is connected to the feed hopper 220 of the powder buffer silo 100 through a pipeline, feeding polypropylene powder into the feed cylinder 200. The powder buffer silo 100 is connected to the input end of the extrusion granulation device through the feeding auger 500 in the discharge pipe 110, realizing the stable conveying of the dispersed powder. The output end of the extrusion granulation device is connected to the cooling and curing device to cool and shape the hot granules. An inert gas protection device is connected to the powder buffer silo 100 and the extrusion granulation device to maintain a slight positive pressure inside to prevent powder oxidation. The controller is connected to the geared motor, dual-shaft motor 420, feeding auger drive motor of the powder buffer silo 100, and sensors of each device, respectively, to regulate the rotation of the feed cylinder, the splashing disc throwing, the scraping plate scraping, and the feeding speed, while coordinating the operating parameters of the extrusion granulation device and the cooling and curing device to ensure a smooth and efficient process.

[0038] In summary, the material in the polymerization reactor enters the barrel 200 through the feed hopper 220 and the movable pipe 210. The reduction motor drives the second gear 240 to rotate, which in turn drives the barrel 200 to rotate through the first gear 230. When the barrel 200 rotates, the reciprocating filament tube 310 fixed on its outer surface rotates synchronously, causing the sliding cylinder 300, which is sleeved outside the barrel 200, to move vertically back and forth along the barrel 200. This movement is also caused by the connecting sleeve 330 to drive the sliding cylinder 340 and the splash chamber 350 at the bottom to move up and down as the barrel 200 rotates. The material falls into the splash bin 350, and the dual-shaft motor 420 drives the eccentric splash disk 430 to rotate. In conjunction with the guide ring plate, the powder is thrown from the discharge trough 351 and smashed against the annular reinforcing plate 120 to crush the agglomerates. The dispersed powder falls through the conical guide plate 130. The dual-shaft motor 420 drives the rotating shaft 440 and the material scraping plate 450 to scrape the material on the surface of the conical guide plate 130. Finally, the powder reaches the bottom of the powder buffer bin 100 and is conveyed by the feeding auger 500 through the discharge pipe 110 to the extrusion granulation device.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high melt flow index polypropylene production apparatus, comprising a powder buffer silo (100) for temporary storage and conveying of polypropylene powder, characterized in that: A material cylinder (200) is vertically arranged above the inner cavity of the powder buffer hopper (100). A sliding cylinder (340) is vertically slidably arranged inside the material cylinder (200). A splash hopper (350) is connected to the bottom of the sliding cylinder (340). A splash disk (430) is eccentrically arranged at the bottom of the inner cavity of the splash hopper (350). The splash disk (430) is driven by a drive structure and is used to throw the powder entering the splash hopper (350) outward.

2. The apparatus for producing high melt flow index polypropylene according to claim 1, characterized in that: The outer surface of the material cylinder (200) is provided with a slide cylinder (300), wherein the material cylinder (200) and the slide cylinder (300) are movably connected by a reciprocating wire cylinder (310).

3. The apparatus for producing high melt flow index polypropylene according to claim 2, characterized in that: The bottom of the slide cylinder (300) is movably connected to a connecting sleeve (330), and the bottom of the slide cylinder (340) is connected to the side opposite to the connecting sleeve (330) and the splash chamber (350).

4. The apparatus for producing high melt flow index polypropylene according to claim 3, characterized in that: The outer side of the splash chamber (350) is provided with a discharge trough (351), and there are multiple discharge troughs (351) evenly and symmetrically opened on the outer surface of the splash chamber (350); The bottom of the inner cavity of the splash chamber (350) is equipped with a flow guide ring plate, which is used in conjunction with the splash disk (430).

5. The apparatus for producing high melt flow index polypropylene according to claim 4, characterized in that: The bottom of the splash chamber (350) is provided with a lower partition (400), which is used to install a drive structure for driving the splash disk (430). A slip ring (410) is connected to the bottom of the splash chamber (350) and the top of the lower partition (400). The top of the lower partition (400) is provided with a slip ring groove in the shape of a ring.

6. The apparatus for producing high melt flow index polypropylene according to claim 5, characterized in that: The drive structure is a dual-axis motor (420); and an annular reinforcing plate (120) is inlaid in the inner cavity of the surface of the powder buffer bin (100), which is used to increase the structural strength of the powder buffer bin (100).

7. The apparatus for producing high melt flow index polypropylene according to claim 6, characterized in that: A conical guide plate (130) is provided below the inner cavity of the powder buffer hopper (100), with its tip pointing downwards. A rotating shaft (440) is connected to the output end of the dual-axis motor (420) on the lower side. A connecting rod (451) is connected to the bottom of the surface of the rotating shaft (440), and a material feeding plate (450) is fixedly connected to the other end of the connecting rod (451).

8. The apparatus for producing high melt flow index polypropylene according to claim 1, characterized in that: The top of the material cylinder (200) is rotatably provided with a movable tube (210), and the top of the movable tube (210) is connected to the feed hopper (220).

9. The apparatus for producing high melt flow index polypropylene according to claim 8, characterized in that: Gear 1 (230) is sleeved on the surface of the barrel (200), and gear 2 (240) is meshed on one side of gear 1 (230). Gear 2 (240) is driven by a gear reduction motor.

10. The apparatus for producing high melt flow index polypropylene according to claim 1, characterized in that: The bottom of the powder buffer silo (100) is conical, and its output end is connected to a discharge pipe (110). A feeding auger (500) is horizontally arranged inside the discharge pipe (110). The feeding auger (500) is driven by a drive motor installed on the outside of the discharge pipe (110).

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