Aluminum-containing PVC (polyvinyl chloride) plastic package crushing device

Abstract

The utility model discloses an aluminum-containing PVC (polyvinyl chloride) plastic package smashing device which comprises a smashing cylinder, a smashing cavity is arranged on the upper portion of an inner cavity of the smashing cylinder, a feeding cavity is arranged on the lower portion of the smashing cylinder, a material passing port is arranged between the feeding cavity and the smashing cavity, the feeding cavity is an annular cavity and is connected with a feeding port, and the feeding port is connected with the smashing cylinder. The crushing cavity is connected with a discharge port, a crushing mechanism is rotatably mounted in the crushing cavity, the crushing mechanism comprises a crushing roller, a movable crushing cutter is fixedly mounted on the peripheral surface of the crushing roller, a static crushing cutter matched with the movable crushing cutter is arranged on the inner wall of the crushing cavity, and the crushing roller is connected with a rotation driving motor. The dynamic crushing cutter and the static crushing cutter generate extremely high impact force and shearing force on materials through high-speed rotation of the rotor to crush the materials, the materials are fully crushed in a lower-feeding and upper-discharging mode, the materials rapidly pass through the crushing area under the negative pressure effect of the induced draft fan and enter the stock bin cyclone collector, and the situation that the concentration of particles in a crushing cavity is too high is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pulverizing devices, more particularly to a kind of pulverizing device of aluminium-containing PVC plastic package. BACKGROUND

[0002] In the plastic recycling industry, the pulverizing treatment of aluminium-containing PVC (polyvinyl chloride) plastic packaging materials is a challenging task. This type of material is usually composed of a PVC matrix combined with an aluminum foil layer, widely used in food packaging, pharmaceutical packaging and other fields, with excellent barrier properties and mechanical strength. However, due to its composite material characteristics, there is a high risk of production safety during the pulverizing process due to the flammable and explosive nature of aluminum powder. The three elements of aluminum powder combustion and explosion include: material concentration, particle fineness, and spark. When the concentration of aluminum powder in the pulverizing cavity reaches a certain range, and the particle fineness is small, it is easy to cause combustion and explosion accidents when encountering ignition sources such as sparks or static electricity discharge, posing a serious threat to production equipment and personnel safety.

[0003] In the prior art, aluminum powder pulverizing equipment usually uses simple ventilation or negative pressure devices to control the concentration of materials, but this method cannot accurately control the concentration of aluminum powder in the pulverizing cavity, and there is a problem of large fluctuations in material concentration. In addition, the material passing efficiency of traditional pulverizing equipment is low, which leads to a long residence time of aluminum powder in the pulverizing cavity, increasing the risk of combustion and explosion. At the same time, aluminum powder is prone to generate static electricity during the pulverizing process, and there is a lack of effective anti-static measures, further exacerbating the safety hazard. SUMMARY

[0004] To make up for the above shortcomings, the present utility model provides a kind of aluminium-containing PVC plastic package pulverizing device that can effectively control the concentration of materials in the pulverizing cavity and improve the efficiency of materials passing through the pulverizing cavity.

[0005] The technical solution of the present utility model is: a kind of aluminium-containing PVC plastic package pulverizing device, including pulverizing cylinder, the upper part of the inner cavity of the pulverizing cylinder is provided with pulverizing cavity, the lower part of the pulverizing cylinder is provided with feed cavity, the feed cavity and the pulverizing cavity are provided with material passing port, the feed cavity is annular cavity, the feed cavity is connected with feed port, the pulverizing cavity is connected with discharge port, the pulverizing mechanism is rotatably installed in the pulverizing cavity, the pulverizing mechanism includes pulverizing roller, the outer circumferential surface of the pulverizing roller is fixedly installed with dynamic pulverizing knife, the inner wall of the pulverizing cavity is provided with static pulverizing knife matched with the dynamic pulverizing knife, and the pulverizing roller is connected with rotation driving motor.

[0006] As a preferred technical solution, the material passing port is annular and located on the inner side of the dynamic pulverizing knife.

[0007] As a preferred technical scheme, the pulverizing roller comprises a barrel body, the barrel body comprises an inner barrel and an outer barrel fixedly installed together, the outer barrel is sleeved outside the inner barrel, a plurality of vertically extending clamping grooves are arranged on the outer barrel, the clamping grooves pass through upper and lower end faces of the outer barrel, an upper end cover is detachably installed on an upper end of the barrel body, a lower end cover is detachably installed on a lower end of the barrel body, a plurality of threaded through holes are arranged on a barrel wall of the inner barrel, a jacking bolt is screwed in the threaded through hole, a strip-shaped cutter seat is clamped in the clamping groove, a bottom plate located between the outer barrel and the inner barrel is fixedly installed on the strip-shaped cutter seat, the bottom plate is perpendicular to the strip-shaped cutter seat, mounting screw holes matched with the jacking bolt are arranged on the bottom plate, and a movable pulverizing cutter is installed on the strip-shaped cutter seat.

[0008] As a preferred technical scheme, a material blocking ring is fixedly installed on a lower surface of the lower end cover.

[0009] As a preferred technical scheme, a static cutter seat is fixedly installed on an inner wall of the pulverizing cavity, the static pulverizing cutter is detachably fixedly installed on the static cutter seat, a pulverizing groove is arranged on an outer side surface of the static pulverizing cutter, the pulverizing groove extends upward and downward, a groove wall of the pulverizing groove comprises a first groove wall extending to an inside of the pulverizing cavity along a rotating direction of the pulverizing roller and a second groove wall extending to the inside of the pulverizing cavity against the rotating direction of the pulverizing roller, a first included angle between the second groove wall and the inner wall of the pulverizing cavity is smaller than a second included angle between the first groove wall and the inner wall of the pulverizing cavity, and the rotating direction of the pulverizing roller is from the second groove wall to the first groove wall.

[0010] As a preferred technical scheme, a vertical groove is arranged on an inner wall of the pulverizing barrel body, an upper end of the vertical groove extends to an upper end face of the pulverizing barrel body, a cross section of the static cutter seat is trapezoidal, an upper base edge of the trapezoid is fitted on the inner wall of the pulverizing barrel body, the static pulverizing cutter is provided with a clamping groove matched with the static cutter seat, and a pressing block is fixedly installed on the upper end of the pulverizing barrel body and presses the upper end of the static cutter.

[0011] As a preferred technical scheme, a controller is connected with a motor of a feeding belt conveyor supplying material to the feeding port, the controller is also electrically connected with a rotating driving motor of the main pulverizing machine, and the controller reduces a rotating speed of the motor of the feeding belt conveyor when a current of the rotating driving motor is greater than a certain value.

[0012] Due to the adoption of the above technical solution, the aluminum-containing PVC plastic packaging crushing device includes a crushing cylinder. The upper part of the inner cavity of the crushing cylinder is provided with a crushing chamber, and the lower part of the crushing cylinder is provided with a feeding chamber. A material outlet is provided between the feeding chamber and the crushing chamber. The feeding chamber is an annular cavity connected to a feed inlet, and the crushing chamber is connected to a discharge outlet. A crushing mechanism is rotatably installed inside the crushing chamber. The crushing mechanism includes a crushing roller, and a moving crushing blade is fixedly installed on the outer circumference of the crushing roller. A stationary crushing blade, which cooperates with the moving crushing blade, is provided on the inner wall of the crushing chamber. The crushing roller is connected to a rotation drive motor. The moving and stationary crushing blades generate extremely high impact and shearing forces on the material through the high-speed rotation of the rotor, crushing the material. The bottom-feeding and top-discharge method ensures that the material is fully crushed and quickly passes through the crushing zone into the cyclone collector in the hopper under the negative pressure of the induced draft fan, avoiding excessively high particle concentration in the crushing chamber. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the pulverizing host in an embodiment of this utility model;

[0015] Figure 2 yes Figure 1 A magnified view of a section at point I;

[0016] Figure 3 This is a top view of the crushing roller in an embodiment of this utility model;

[0017] Figure 4 yes Figure 3 Enlarged view of section II in the middle;

[0018] Figure 5 This is a schematic diagram of the inner and outer cylinders in an embodiment of this utility model;

[0019] Figure 6 yes Figure 5 A magnified view of a section at point III;

[0020] Figure 7 This is a schematic diagram of the structure of the crushing cylinder in an embodiment of this utility model;

[0021] Figure 8 yes Figure 7 A magnified view of a section at point IV in the middle;

[0022] Figure 9 is a top view of Figure 7 ;

[0023] Figure 10 is a partial enlarged view at V in Figure 9 . DETAILED DESCRIPTION

[0024] As shown in Figure 1 and Figure 2 , an aluminum-containing PVC plastic packaging crushing device comprises a crushing cylinder 1, an upper part of an inner cavity of the crushing cylinder 1 is provided with a crushing cavity 2, a lower part of the crushing cylinder 1 is provided with a feeding cavity 3, a feeding port 5 is connected to the feeding cavity 3, a discharging port 6 is connected to the crushing cavity 2, a crushing mechanism is rotatably installed in the crushing cavity 2, the crushing mechanism comprises a crushing roller 7, a dynamic crushing knife 8 is fixedly installed on an outer peripheral surface of the crushing roller 7, a static crushing knife 9 cooperating with the dynamic crushing knife 8 is arranged on an inner wall of the crushing cavity 2, the crushing roller 7 is connected with a rotating driving motor, and the feeding port 4 is annular and located on an inner side of the dynamic crushing knife 8. The dynamic crushing knife 8 and the static crushing knife 9 crush materials by high-speed rotation to generate extremely high impact force and shearing force on the materials. Aluminum powder has the characteristics of being flammable and explosive, and particle fineness, particle concentration and open flame have important influences on safe production. According to the material characteristics, the equipment is designed to control the crushing particle size, and the crushing machine is not designed with an internal classifier, so that the crushed materials do not enter the crushing area again but quickly flow out of the crushing area. The design adopts a lower feeding and upper discharging mode, so that the materials are fully crushed and quickly pass through the crushing area into the bin cyclone collector under the negative pressure action of the induced draft fan.

[0025] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the pulverizing roller comprises a barrel body, the barrel body comprises an inner barrel 10 and an outer barrel 11 fixedly installed together, the outer barrel 11 is sleeved outside the inner barrel 10, a plurality of vertically extending clamping grooves 17 are arranged on the outer barrel 11, the clamping grooves pass through the upper end face and the lower end face of the outer barrel, an upper end cover 12 is detachably installed on the upper end of the barrel body, a lower end cover 13 is detachably installed on the lower end of the barrel body, a plurality of threaded holes are arranged on the barrel wall of the inner barrel 10, a top tightening bolt 14 is screwed in the threaded hole, a strip-shaped cutter seat 15 is clamped in the clamping groove, a bottom plate 16 located between the outer barrel 11 and the inner barrel 10 is fixedly installed on the strip-shaped cutter seat 15, the bottom plate 16 is perpendicular to the strip-shaped cutter seat 15, the bottom plate 16 is provided with a mounting screw hole matched with the top tightening bolt 14, and a movable pulverizing cutter is installed on the strip-shaped cutter seat. The strip-shaped cutter seat 15 is fixed by the clamping groove and the top tightening bolt 14, can be independently disassembled and replaced, does not need to disassemble the entire pulverizing roller, greatly simplifies the maintenance process, and improves the equipment utilization rate. The fixing mode of the top tightening bolt 14 is easy to operate, and the replacement and adjustment of the blade can be completed without complex tools. The strip-shaped cutter seat is doubly fixed by the clamping groove and the top tightening bolt, effectively preventing the blade from loosening or falling off during use, and improving the equipment running stability. The top tightening bolt 14 firmly presses the bottom plate on the inner barrel through the threaded hole, ensures that the movable pulverizing cutter is uniformly stressed, and avoids damage of the movable pulverizing cutter caused by stress concentration. The modular design and convenient maintenance mode can timely find and handle equipment faults, avoid fault expansion, and prolong the service life of the equipment. The convenient maintenance mode can reduce equipment downtime, improve production efficiency, and reduce production cost.

[0026] As shown in Figure 1 and Figure 2 As shown, the lower surface of the lower end cover 13 is fixedly installed with a material blocking ring 19. The material blocking ring 19 can block the fine materials generated in the pulverizing process from escaping from the lower end of the pulverizing roller, the material blocking ring 19 blocks the materials in the pulverizing cavity 2, so that the materials can be fully pulverized, and the material utilization rate and the pulverizing efficiency are improved. By adjusting the position and shape of the material blocking ring 19, the residence time of the materials can be controlled, so as to optimize the control of the particle size of the materials. For example, the material blocking ring is a square ring or a hexagonal ring.

[0027] As shown in Figures 6 to 10As shown, the inner wall of the pulverizing cavity 2 is fixedly installed with a static knife seat 20, and the static pulverizing knife is detachably fixedly installed on the static knife seat 20; the outer side surface of the static pulverizing knife 9 is provided with a pulverizing groove 21 extending upward and downward, the groove wall of the pulverizing groove 21 comprises a first groove wall 22 extending to the inside of the pulverizing cavity along the rotating direction of the pulverizing roller and a second groove wall 23 extending to the inside of the pulverizing cavity against the rotating direction of the pulverizing roller, the first included angle 29 between the second groove wall 23 and the inner wall of the pulverizing cavity 2 is smaller than the second included angle 30 between the first groove wall 22 and the inner wall of the pulverizing cavity 2, and the rotating direction of the pulverizing roller is from the second groove wall 23 to the first groove wall 22. In this way, the material is more easily entered into the pulverizing groove 21 under the action of the pulverizing roller, and the pulverizing efficiency is effectively improved.

[0028] As shown in Figure 7 and Figure 8 As shown, the inner wall of the pulverizing cylinder 1 is provided with a vertical groove 24 extending to the upper end surface of the pulverizing cylinder 1, the static knife seat 20 is in a trapezoidal cross section, the upper base edge 25 of the trapezoid is attached to the inner wall of the pulverizing cylinder 1, the static pulverizing knife is provided with a clamping groove matched with the static knife seat 20, and the upper end of the pulverizing cylinder 1 is fixedly installed with a pressing block 27 pressed on the upper end of the static knife.

[0029] The motor of the feeding belt conveyor supplying the material to the feeding port is connected with a controller, and the controller is also electrically connected with the rotating driving motor 28 of the pulverizing main machine; the controller reduces the rotating speed of the motor of the feeding belt conveyor after the current of the rotating driving motor is greater than a certain value. In order to control the particle concentration in the pulverizing cavity, a method of controlling the feeding amount of the main machine by current is designed, and the current of the rotating driving motor 28 of the pulverizing main machine is increased after the particle concentration in the pulverizing area is increased during the pulverizing process, so that the feeding amount of the feeding belt conveyor is reduced by the current of the pulverizing main machine.

[0030] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An aluminum-containing PVC plastic packaging pulverizing device, characterized by, The application relates to a pulverizing device, which comprises a pulverizing barrel, an upper part of an inner cavity of the pulverizing barrel is provided with a pulverizing cavity, a lower part of the pulverizing barrel is provided with a feeding cavity, a through hole is arranged between the feeding cavity and the pulverizing cavity, the feeding cavity is an annular cavity, the feeding cavity is connected with a feeding port, the pulverizing cavity is connected with a discharging port, a pulverizing mechanism is rotatably arranged in the pulverizing cavity, the pulverizing mechanism comprises a pulverizing roller, a dynamic pulverizing cutter is fixedly arranged on an outer circumferential surface of the pulverizing roller, a static pulverizing cutter is arranged on an inner wall of the pulverizing cavity and matched with the dynamic pulverizing cutter, and a rotating driving motor is connected with the pulverizing roller.

2. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 1, wherein, The through hole is annular and located on the inner side of the dynamic pulverizing cutter.

3. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 1, wherein The pulverizing roller comprises a barrel, the barrel comprises an inner barrel and an outer barrel which are fixedly arranged together, the outer barrel is sleeved outside the inner barrel, a plurality of vertically-arranged clamping grooves are arranged on the outer barrel and pass through upper and lower end faces of the outer barrel, an upper end of the barrel is detachably provided with an upper end cover, a lower end of the barrel is detachably provided with a lower end cover, a plurality of threaded through holes are arranged on a barrel wall of the inner barrel, top pressing bolts are screwed into the threaded through holes, a strip-shaped cutter seat is clamped in the clamping groove, a bottom plate located between the outer barrel and the inner barrel is fixedly arranged on the strip-shaped cutter seat, the bottom plate is perpendicular to the strip-shaped cutter seat, mounting screw holes matched with the top pressing bolts are arranged on the bottom plate, and a dynamic pulverizing cutter is arranged on the strip-shaped cutter seat.

4. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 3, wherein A material blocking ring is fixedly arranged on a lower surface of the lower end cover.

5. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 1, wherein The inner wall of the pulverizing cavity is fixedly provided with a static cutter seat, the static cutter is detachably fixed on the static cutter seat, an outer side surface of the static cutter is provided with a pulverizing groove which extends upwards and downwards, a groove wall of the pulverizing groove comprises a first groove wall which extends towards the inside of the pulverizing cavity along a rotating direction of the pulverizing roller and a second groove wall which extends towards the inside of the pulverizing cavity against the rotating direction of the pulverizing roller, a first included angle between the second groove wall and the inner wall of the pulverizing cavity is smaller than a second included angle between the first groove wall and the inner wall of the pulverizing cavity, and the rotating direction of the pulverizing roller is from the second groove wall to the first groove wall.

6. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 5, wherein The inner wall of the pulverizing barrel is provided with a vertical groove, an upper end of the vertical groove extends to an upper end face of the pulverizing barrel, a cross section of the static cutter seat is trapezoidal, an upper base of the trapezoid is attached to the inner wall of the pulverizing barrel, the static cutter is provided with a clamping groove matched with the static cutter seat, and a pressing block is fixedly arranged on the upper end of the static cutter seat.

7. The aluminum-containing PVC plastic wrapping pulverizing apparatus as claimed in claim 1, wherein A motor of a feeding belt conveyor which feeds the feeding port is connected with a controller, the controller is also electrically connected with a rotating driving motor of a pulverizing main machine, and the controller reduces the rotating speed of the motor of the feeding belt conveyor when the current of the rotating driving motor is greater than a certain value.

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