Anti-blocking device based on polyethylene extruder

Abstract

The utility model discloses an anti-blocking device based on a polyethylene extruder, and relates to the technical field of anti-blocking of extruders. The anti-blocking device based on the polyethylene extruder comprises a barrel, the top of the barrel penetrates through and is fixedly connected with a discharging opening, the bottom of the barrel penetrates through and is fixedly connected with a discharging opening, a motor is arranged at the top of the barrel, the motor is in transmission connection with a rotating shaft through an output shaft of the motor, and the middle end of the rotating shaft is fixedly connected with a smashing paddle; a shaking screening mechanism and an intermittent discharging mechanism are arranged in the barrel, and the shaking screening mechanism comprises a bevel gear A, a rotating rod, a fixing ring and a screening net plate. Therefore, the motor is started to drive the rotating shaft and the smashing paddles to rotate to smash caked raw materials, meanwhile, the screening net is driven to repeatedly shake up and down, the non-caked raw materials fall down, the caked raw materials are shaken up by the screening net to make contact with the smashing paddles again to be smashed, and the smashing effect and the screening effect are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder anti-blocking, in particular to an anti-blocking device for a polyethylene extruder. Background Art

[0002] Polyethylene is a thermoplastic resin made from the polymerization reaction of ethylene monomers. It is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, and good chemical stability. Because the polymer molecules are connected by carbon-carbon single bonds, it can withstand the corrosion of most acids and alkalis, is insoluble in general solvents at room temperature, has low water absorption, and has excellent electrical insulation properties. Polyethylene has a wide range of uses, mainly used to manufacture films, packaging materials, containers, pipes, monofilaments, wires and cables, daily necessities, etc., and can be used as high-frequency insulation materials for televisions, radars, etc.

[0003] The utility model with publication number CN215550763U discloses an anti-blocking feeding device for a PVC extruder, comprising a lower shell, which is installed at the feeding position of the PVC extruder device, a screen for screening raw materials movably installed on the upper part of the lower shell, and a rolling plate for crushing agglomerated raw materials is provided above the screen; a discharge baffle, which is movably installed at the discharge position at the lower end of the lower shell, and a spiral dredging rod is fixedly installed on the lower surface of the discharge baffle to prevent blockage during discharge; a feed port is provided on the left and right sides of the upper surface of the upper shell. In the above application document, the active helical gear is driven to rotate by the central rotating shaft, thereby driving the driven helical gear meshing with it to rotate synchronously, and the cam is used to push the screen upward, and the reset spring pushes it, so that the screen vibrates up and down, speeding up the screening speed, and when the screen moves to the top, the agglomerated raw materials are squeezed between the rolling plate and crushed. The screen itself is easy to deform and contact with the rolling plate, and the force to squeeze the agglomerated raw materials is relatively limited. Some agglomerated raw materials may be difficult to be crushed, which will affect the feeding efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides an anti-blocking device for a polyethylene extruder, which solves the problems raised in the above-mentioned background technology. To achieve the above objectives, the utility model is implemented through the following technical solutions: an anti-blocking device for a polyethylene extruder, comprising a cylinder, the top of the cylinder passes through and is fixedly connected to a feeding port, the bottom of the cylinder passes through and is fixedly connected to a discharging port, a motor is provided at the top of the cylinder, the motor is connected to a rotating shaft through its output shaft, the middle end of the rotating shaft is fixedly connected to a crushing paddle, a shaking screening mechanism and an intermittent feeding mechanism are provided inside the cylinder, the shaking screening mechanism comprises a bevel gear A, a rotating rod, a fixing ring, and a screening mesh plate, the bevel gear A is fixedly connected to the bottom of the rotating shaft, the rotating rod is rotatably connected to the inside of the cylinder, the side of the rotating rod is fixedly connected to a bevel gear B, the middle end of the rotating rod is fixedly connected to a gear, the fixing ring is fixedly connected to the inside of the cylinder, the screening mesh plate is slidably connected to the inside of the cylinder, the top of the fixing ring is fixedly connected to a telescopic spring, the end of the telescopic spring away from the fixing ring is fixedly connected to the bottom of the screening mesh plate, and the bottom of the screening mesh plate is fixedly connected to a gear rod.

[0005] Preferably, the bevel gear A is vertically meshed with the bevel gear B, the gear is an incomplete gear, and the teeth on the gear are meshed with the teeth on the gear rod. At the beginning, the gear rotates to drive the gear rod and the screening mesh plate to move downward, and the telescopic spring is tightened. When the gear rotates to the toothless part, the telescopic spring rebounds to drive the screening mesh plate to bounce upward.

[0006] Preferably, the maximum retractable length of the telescopic spring is less than the distance from the screening mesh plate to the crushing paddle, and the telescopic spring rebounds after being tightened to drive the screening mesh plate to bounce upward without hitting the crushing paddle.

[0007] Preferably, the intermittent unloading mechanism includes a connecting rod and a bracket, the connecting rod is fixedly connected to the bottom of the screening mesh, the bottom of the connecting rod is fixedly connected to a unloading block, the bracket is fixedly connected to the inside of the cylinder, the top of the bracket is fixedly connected to an air pressure chamber, one end of the air pressure chamber is provided with an air bag, the other end of the air pressure chamber is slidably connected to a push rod by the internal piston, and the end of the push rod away from the air pressure chamber is fixedly connected to a collision plate.

[0008] Preferably, the blanking block is truncated cone-shaped as a whole, and the outer diameter of the blanking block is equal to the outer diameter of the blanking port. When the raw material falls on the truncated cone-shaped blanking block, it will slide down through its inclined surface, and when the blanking block moves downward, it will close the blanking port.

[0009] Preferably, the airbag is in an expanded state in the initial state, and the impact plate is close to the inner wall of the cylinder in the initial state. When the airbag is squeezed, the internal air pressure will enter the air pressure chamber, thereby pushing the push rod to move to the left. The push rod moving to the left will drive the impact plate to hit the inner wall of the cylinder, causing the cylinder to vibrate.

[0010] The utility model provides an anti-blocking device for a polyethylene extruder, which has the following beneficial effects:

[0011] (1) The present application is provided with a shaking screening mechanism, so that the motor is turned on to drive the rotating shaft and the breaking paddle to rotate to break the agglomerated raw materials. At the same time, it also drives the screening net to shake up and down repeatedly, so that the non-agglomerated raw materials fall down, and the agglomerated raw materials are shaken up by the screening net and come into contact with the breaking paddle again to be broken, thereby enhancing the breaking effect and the screening effect.

[0012] (2) The present application is provided with an intermittent feeding mechanism, so that the screening net will shake up and down repeatedly, which will drive the feeding block to move up and down repeatedly. The repeated up and down movement of the feeding block will intermittently block the feeding port to prevent blockage caused by too much feeding at one time. At the same time, it will also drive the impact plate to hit the inside of the cylinder to generate vibration to prevent the raw materials from getting stuck in other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the shaking screening mechanism of the utility model;

[0016] Figure 4 This is a schematic diagram of the intermittent feeding mechanism structure of the utility model.

[0017] In the figure: 1. Cylinder; 2. Feeding port; 3. Discharging port; 4. Motor; 5. Rotating shaft; 6. Breaking paddle; 7. Shaking screening mechanism; 71. Bevel gear A; 72. Rotating rod; 73. Bevel gear B; 74. Gear; 75. Fixed ring; 76. Screening mesh plate; 77. Telescopic spring; 78. Gear rod; 8. Intermittent feeding mechanism; 81. Connecting rod; 82. Feeding block; 83. Bracket; 84. Air pressure chamber; 85. Airbag. DETAILED DESCRIPTION

[0018] 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 described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0019] See also Figure 1-3, an anti-blocking device for a polyethylene extruder, comprising a cylinder 1, a feed port 2 passing through and fixedly connected to the top of the cylinder 1, a discharge port 3 passing through and fixedly connected to the bottom of the cylinder 1, a motor 4 is provided on the top of the cylinder 1, the motor 4 is connected to a rotating shaft 5 through its output shaft, a crushing paddle 6 is fixedly connected to the middle end of the rotating shaft 5, a shaking screening mechanism 7 and an intermittent feeding mechanism 8 are provided inside the cylinder 1, the shaking screening mechanism 7 comprises a bevel gear A71, a rotating rod 72, a fixing ring 75 and a screening mesh plate 76, the bevel gear A71 is fixedly connected to the bottom of the rotating shaft 5, the rotating rod 72 is rotatably connected to the inside of the cylinder 1, the side of the rotating rod 72 is fixedly connected to a bevel gear B73, the middle end of the rotating rod 72 is fixedly connected to a gear 74, the fixing ring 75 is fixedly connected to the inside of the cylinder 1, the screening mesh plate 76 is slidably connected to the inside of the cylinder 1, and fixed The top of the ring 75 is fixedly connected to a telescopic spring 77, and one end of the telescopic spring 77 away from the fixed ring 75 is fixedly connected to the bottom of the screening mesh plate 76. The maximum telescopic length of the telescopic spring 77 is less than the distance from the screening mesh plate 76 to the crushing paddle 6. After the telescopic spring 77 is tightened, it rebounds and drives the screening mesh plate 76 to bounce upward without hitting the crushing paddle 6. The bottom of the screening mesh plate 76 is fixedly connected to a gear rod 78, and the bevel gear A71 is vertically meshed with the bevel gear B73. The gear 74 is an incomplete gear, and the teeth on the gear 74 are meshed with the teeth on the gear rod 78. The rotation of the bevel gear A71 drives the bevel gear B73 to rotate. At the beginning, the rotation of the gear 74 drives the gear rod 78 and the screening mesh plate 76 to move downward, and the telescopic spring 77 is tightened. When the gear 74 rotates to the part without teeth, the telescopic spring 77 rebounds and drives the screening mesh plate 76 to bounce upward.

[0020] When in use, install the barrel 1 at the feeding position of the extruder, turn on the motor 4, and feed the polyethylene raw material into the barrel 1 through the discharge port 2. The motor 4 drives the rotating shaft 5 to rotate through its output shaft, and the rotating shaft 5 drives the breaking paddle 6 to rotate to break the falling raw materials to prevent large lumps. The un-lumped raw materials will fall through the screening mesh plate 76. At the same time, the rotating shaft 5 rotates to drive the bevel gear A71 to rotate, the bevel gear A71 rotates to drive the bevel gear B73 to rotate, the bevel gear B73 rotates to drive the rotating rod 72 to rotate, and the rotating rod 72 rotates to drive the gear 74 to rotate. Once turned on, The initial rotation of gear 74 drives the gear rod 78 and the screening mesh plate 76 to move downward, and the telescopic spring 77 is tightened. When the gear 74 rotates to the toothless part, the telescopic spring 77 rebounds and drives the screening mesh plate 76 to bounce upward, thereby achieving the effect of driving the screening mesh plate 76 to shake back and forth up and down, enhancing the screening effect, and at the same time, it can also shake up the lumps that have not been completely broken up and contact the breaking paddle 6 again to be broken. Then the raw material falls from the discharge port 2 to the feeding position of the extruder. By breaking up the agglomerated raw materials, it effectively prevents the agglomerated raw materials from clogging the feeding position of the extruder. Example

[0021] See also Figure 1-4On the basis of the first embodiment, the intermittent unloading mechanism 8 includes a connecting rod 81 and a bracket 83. The connecting rod 81 is fixedly connected to the bottom of the screening mesh plate 76. The bottom of the connecting rod 81 is fixedly connected to a unloading block 82. The unloading block 82 is truncated cone-shaped as a whole. The outer diameter of the unloading block 82 is equal to the outer diameter of the unloading port 2. When the raw material falls on the truncated cone-shaped unloading block 82, it will slide down through its inclined surface. When the unloading block 82 moves downward, it will close the unloading port 2. The bracket 83 is fixedly connected to the inside of the cylinder 1. The top of the bracket 83 is fixedly connected There is an air pressure chamber 84, one end of which is provided with an air bag 85, and the other end of the air pressure chamber 84 is slidably connected to a push rod 86 by an internal piston, and the end of the push rod 86 away from the air pressure chamber 84 is fixedly connected to a striker plate 87. The air bag 85 is in an expanded state in the initial state, and the striker plate 87 is close to the inner wall of the cylinder 1 in the initial state. When the air bag 85 is squeezed, the air pressure inside it will enter the air pressure chamber 84, thereby pushing the push rod 86 to move to the left. The left movement of the push rod 86 will drive the striker plate 87 to hit the inner wall of the cylinder 1, causing the cylinder 1 to vibrate.

[0022] During use, based on Example 1, the screening mesh plate 76 moves up and down and at the same time, it will drive the material block 82 to move up and down repeatedly through the connecting rod 81. When the material block 82 moves downward, it will close the material discharge port 2, and intermittently block the material discharge port 2 to prevent too much material from being discharged at one time and causing blockage. At the same time, when the screening mesh plate 76 is driven to bounce upward by the rebound of the tightened telescopic spring 77, it will move a certain distance upward than the initial position due to inertia. At this time, the material block 82 will move upward and squeeze the airbag 85. When the airbag 85 is squeezed, the air pressure inside it will enter the air pressure chamber 84, thereby pushing the push rod 86 to move to the left. The push rod 86 moving to the left will drive the impact plate 87 to hit the inner wall of the cylinder 1, causing the cylinder 1 to vibrate, thereby preventing the raw material from being stuck in other structures.

[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-blocking device for a polyethylene extruder, comprising a barrel (1), characterized in that: The top of the cylinder (1) is penetrated by and fixedly connected to a discharge port (2), the bottom of the cylinder (1) is penetrated by and fixedly connected to a discharge port (3), a motor (4) is provided on the top of the cylinder (1), the motor (4) is connected to a rotating shaft (5) through its output shaft, a crushing paddle (6) is fixedly connected to the middle end of the rotating shaft (5), and a shaking screening mechanism (7) and an intermittent discharge mechanism (8) are provided inside the cylinder (1); The shaking screening mechanism (7) includes a bevel gear A (71), a rotating rod (72), a fixed ring (75), and a screening mesh plate (76), wherein the bevel gear A (71) is fixedly connected to the bottom of the rotating shaft (5), the rotating rod (72) is rotatably connected to the inside of the cylinder (1), the side of the rotating rod (72) is fixedly connected to the bevel gear B (73), the middle end of the rotating rod (72) is fixedly connected to the gear (74), the fixed ring (75) is fixedly connected to the inside of the cylinder (1), the screening mesh plate (76) is slidably connected to the inside of the cylinder (1), the top of the fixed ring (75) is fixedly connected to a telescopic spring (77), the end of the telescopic spring (77) away from the fixed ring (75) is fixedly connected to the bottom of the screening mesh plate (76), and the bottom of the screening mesh plate (76) is fixedly connected to a gear rod (78).

2. The anti-clogging device for a polyethylene extruder according to claim 1, wherein: The bevel gear A (71) is vertically meshed with the bevel gear B (73); the gear (74) is an incomplete gear, and the teeth on the gear (74) are meshed with the teeth on the gear rod (78).

3. The anti-clogging device for a polyethylene extruder according to claim 2, wherein: The maximum retractable length of the telescopic spring (77) is less than the distance from the screening mesh plate (76) to the breaking paddle (6).

4. The anti-clogging device for a polyethylene extruder according to claim 3, characterized in that: The intermittent unloading mechanism (8) includes a connecting rod (81) and a bracket (83), wherein the connecting rod (81) is fixedly connected to the bottom of the screening mesh plate (76), the bottom of the connecting rod (81) is fixedly connected to a unloading block (82), the bracket (83) is fixedly connected to the inside of the cylinder (1), the top of the bracket (83) is fixedly connected to an air pressure chamber (84), one end of the air pressure chamber (84) is provided with an air bag (85), the other end of the air pressure chamber (84) is slidably connected to a push rod (86), and the end of the push rod (86) away from the air pressure chamber (84) is fixedly connected to a collision plate (87).

5. The anti-clogging device for a polyethylene extruder according to claim 4, characterized in that: The blanking block (82) is truncated cone-shaped as a whole, and the outer diameter of the blanking block (82) is equal to the outer diameter of the blanking opening (2).

6. The anti-clogging device for a polyethylene extruder according to claim 5, characterized in that: The airbag (85) is in an expanded state in an initial state, and the collision plate (87) is close to the inner wall of the cylinder (1) in an initial state.

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