Plastic conveying fluff filtering device capable of automatically cleaning

Abstract

The plastic conveying fluff filtering device comprises a raw material conveying pipeline, a filtering assembly, a fluff collecting bin and a rotary driving mechanism, the fluff collecting bin is located under the portion, close to the outlet end of the raw material conveying pipeline, of the raw material conveying pipeline, the fluff collecting bin is fixedly connected with the raw material conveying pipeline, and the filtering assembly comprises a filtering net; the filter screen is round, the diameter of the filter screen is matched with the inner diameter of the raw material conveying pipeline, a limiting block is arranged at the top of the raw material conveying pipeline, the bottom of the filter screen is hinged to the raw material conveying pipeline, and the rotary driving mechanism can drive the filter screen to rotate along the plane parallel to the axis of the raw material conveying pipeline till the filter screen rotates to the vertical state. The filter screen seals the raw material conveying pipeline and is limited through a limiting block. The device is simple in structure, convenient to operate and capable of automatically cleaning conveying batting generated in the plastic particle raw material conveying pipeline and cleaning and collecting the conveying batting, labor is saved, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline plastic production equipment, and in particular to a plastic conveying fluff filtering device capable of automatically cleaning. Background Art

[0002] In the process of conveying plastic pipe pellet raw materials, the raw materials are generally conveyed from the storage tank to the production line through a stainless steel pipe by a vacuum pump. In this process, the raw materials, the raw materials and the air, and the raw materials and the inner wall of the stainless steel pipe will constantly collide and rub to generate heat, causing the raw materials to soften and adhere to the inner wall of the stainless steel pipe, forming a layer of raw material film. Under the continuous impact of plastic particles, the film falls off from the inner wall of the stainless steel pipe to form conveying fluff similar to "ribbons". These conveying fluffs enter the production line together with the raw materials, which may cause uneven feeding and affect product performance.

[0003] The conventional solution is to add a filter during the conveying of raw materials to filter the fluff through the filter. However, the continuous accumulation of fluff on the filter will cause the conveying pipeline to be blocked, the raw materials cannot be transported, or the vacuum pump is always overloaded due to empty suction. The operator needs to pay attention to the suction situation at all times and clean it up in time, which poses a great hidden danger. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a plastic conveying fluff filtering device that can automatically clean. The device has a simple structure and is easy to operate. It can automatically clean the conveying fluff generated in the plastic particle raw material conveying pipeline and clean and collect the conveying fluff, thereby saving labor and improving production efficiency.

[0005] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0006] A plastic conveying fluff filtering device capable of automatic cleaning comprises a raw material conveying pipeline, a filtering assembly, a fluff collecting bin and a rotating driving mechanism, wherein the fluff collecting bin is located directly below the raw material conveying pipeline near its outlet end, and the fluff collecting bin is fixedly connected to the raw material conveying pipeline, the filtering assembly comprises a filter screen, the filter screen is circular, the diameter of the filter screen matches the inner diameter of the raw material conveying pipeline, a limiting block is provided on the top of the raw material conveying pipeline, and the bottom of the filter screen is hinged to the raw material conveying pipeline;

[0007] When the rotary drive mechanism is not working, the filter screen is placed on the bottom of the raw material conveying pipeline. When the rotary drive mechanism is working, the rotary drive mechanism can drive the filter screen to rotate along a plane parallel to the axis of the raw material conveying pipeline until the filter screen rotates to a vertical state. The filter screen seals the raw material conveying pipeline and the filter screen is limited by a limit block.

[0008] The bottom of the raw material conveying pipeline is provided with a drop-off port for collecting lint, and the filter assembly also includes a hinge, which includes a connecting block, which is connected to the side wall of the filter screen, and the connecting block and the filter screen are distributed on the same plane. A rotating shaft is provided on the side of the connecting block facing away from the filter screen, and the rotating shaft is perpendicular to the axis of the raw material conveying pipeline. A pair of hinged ears are symmetrically provided on the outer side wall of the bottom of the raw material conveying pipeline, and a first give-way groove is provided on the raw material conveying pipeline, and the first give-way groove is connected to the drop-off port. The connecting block passes through the first give-way groove, and the two ends of the rotating shaft are respectively rotatably connected to the two hinged ears, and the rotating drive mechanism can drive the connecting block to rotate.

[0009] The hinged member also includes a push block, one side edge of the push block is connected to the one side edge of the connecting block, and the push block and the connecting block form an L-shaped structure.

[0010] The rotary drive mechanism includes a base, a partition, a connecting rod mechanism, a spring, a slider and a slide rail. The partition is circular, and the diameter of the partition matches the inner diameter of the raw material conveying pipeline. A working port is opened at the bottom of the raw material conveying pipeline. The bottom of the partition is hinged to one side edge of the working port. The bottom of the base is fixed to the bottom of the fluff collecting bin, the slide rail is fixed to the bottom of the fluff collecting bin, the bottom of the slider is installed on the slide rail, the spring is located between the slider and the base, and the two ends of the spring are respectively fixedly connected to the slider and the base. The connecting rod mechanism runs through the working port, and the connecting rod mechanism is respectively hinged to the center of the partition, the base and the slider;

[0011] The partition can rotate along a plane parallel to the axis of the raw material conveying pipeline, and push the slider to slide along the axis of the raw material conveying pipeline. When the slider slides toward the filter, the slider can push the filter to rotate. When the partition rotates to a horizontal state, the partition seals the working port. At this time, the filter is in a vertical state and seals the raw material conveying pipeline, and the slider seals the drop port.

[0012] A semicircular guide groove is provided on the top of the slider, the diameter of which matches the outer diameter of the raw material conveying pipeline, and a second yield groove for accommodating a pair of hinged ears is provided at the bottom of the guide groove. When the slider slides toward the filter screen, the slider contacts the push block and pushes the push block to rotate, thereby rotating the filter screen.

[0013] The connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod runs through the working port, the second connecting rod and the third connecting rod are both located in the fluff collection bin, one end of the first connecting rod is hinged to the center of the partition, the other end of the first connecting rod is hinged to one end of the second connecting rod and the third connecting rod respectively, one end of the second connecting rod is hinged to the base, and the other end of the third connecting rod is hinged to the slider.

[0014] A limiting ring is provided at the bottom of the working opening, and the limiting ring is located in the fluff collecting bin.

[0015] Compared with the prior art, the beneficial effects and advantages of the present invention are:

[0016] The device uses the pressure difference formed by the existing negative pressure suction to push the partition to rotate, thereby pushing the slider to slide toward the filter screen. The slider pushes the push block to rotate, so that the filter screen rotates to a vertical state and is limited by the limit block. Then the granular raw material passes through the filter screen, and the conveying fluff is blocked by the filter screen. When the suction is completed, the partition is reset, and the filter screen falls to the bottom of the raw material conveying pipeline under the action of gravity. The conveying fluff on the filter screen falls through the drop port to the fluff collection bin for collection, thereby avoiding the accumulation of conveying fluff on the filter screen and causing the raw material conveying pipeline to be blocked. It can be seen that the device can automatically clean the conveying fluff generated in the plastic granular raw material conveying pipeline, avoiding the product quality risks caused by the conveying fluff entering the production line. At the same time, it can automatically clean and collect the conveying fluff, without the need for operators to monitor and observe in real time, reducing labor intensity and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the structure of the plastic conveying lint filtering device that can be cleaned automatically (initial state).

[0018] Figure 2 The schematic diagram of the structure of the plastic conveying lint filtering device that can automatically clean up (filtering state).

[0019] Figure 3 Assembly drawing of the raw material delivery pipeline, filter assembly and rotary drive mechanism.

[0020] Figure 4 Assembly drawing of raw material delivery pipeline, filter assembly and rotary drive mechanism (with Figure 3 different angles).

[0021] Figure 5 A schematic diagram of the structure of the filter component.

[0022] Among them, 1-raw material conveying pipeline, 2-lint collection bin, 3-filter screen, 4-dropping port, 5-first clearance groove, 6-connecting block, 7-push block, 8-rotating shaft, 9-hinge ear, 10-limiting block, 11-base, 12-partition, 13-spring, 14-slider, 15-slide rail, 16-working port, 17-limiting ring, 18-second clearance groove, 19-first connecting rod, 20-second connecting rod, 21-third connecting rod, 22-guide groove. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings.

[0024] The structure of the plastic conveying lint filtering device capable of automatic cleaning provided in this embodiment is as follows: Figure 1-2 As shown, it includes a raw material conveying pipeline 1, a filtering component, a fluff collecting bin 2 and a rotating driving mechanism.

[0025] The raw material conveying pipeline 1 is a stainless steel pipeline, the fluff collecting bin 2 is located directly below the raw material conveying pipeline 1 near its outlet end, and the top of the fluff collecting bin 2 is fixedly connected to the bottom of the raw material conveying pipeline 1 (such as by welding).

[0026] like Figure 5 As shown, the filter assembly includes a filter screen 3 and a hinge. The filter screen 3 is circular, and the diameter of the filter screen 3 is slightly smaller than the inner diameter of the raw material conveying pipeline 1, so that the filter screen 3 can smoothly rotate in the raw material conveying pipeline 1. A drop-off opening 4 for collecting fluff is provided at the bottom of the raw material conveying pipeline 1. A first clearance groove 5 is provided on the side of the drop-off opening 4 facing the inlet of the raw material conveying pipeline 1, and the first clearance groove 5 is connected to the drop-off opening 4.

[0027] The hinged part includes a connecting block 6 and a pushing block 7, both of which are square. One side wall of the connecting block 6 is connected to the side wall of the filter screen 3, and the connecting block 6 and the filter screen 3 are distributed on the same plane. The edge of one surface of the pushing block 7 is connected to a side wall of the connecting block 6, and the pushing block 7 and the connecting block 6 form an L-shaped structure. A rotating shaft 8 is connected at the corner of the L-shaped structure, and the rotating shaft 8 is perpendicular to the axis of the raw material conveying pipeline 1, and a pair of rotating shafts 8 are symmetrically distributed on both sides of the pushing block 7. A pair of hinged ears 9 are symmetrically arranged on the outer side wall of the bottom of the raw material conveying pipeline 1, the connecting block 6 passes through the first clearance groove 5, and the two ends of the rotating shaft 8 are rotatably connected to the two hinged ears 9 respectively. When no material is sucked, the filter screen 3 is located on the drop port 4, and the filter screen 3 conflicts with the bottom of the raw material conveying pipeline 1.

[0028] A stopper 10 is provided on the top of the raw material delivery pipeline 1, and the filter screen 3 can rotate along a plane parallel to the axis of the raw material delivery pipeline 1. When the filter screen 3 rotates to a vertical state, the filter screen 3 seals the raw material delivery pipeline 1, and the filter screen 3 is limited by the stopper 10.

[0029] like Figure 3-4 As shown, the rotary drive mechanism includes a base 11, a partition 12, a connecting rod mechanism, a spring 13, a slider 14 and a slide rail 15. The bottom of the base 11 is fixed to the bottom of the fluff collection bin 2. The partition 12 is circular, and the diameter of the partition 12 is slightly smaller than the inner diameter of the raw material conveying pipeline 1, so that the partition 12 can rotate smoothly in the raw material conveying pipeline 1. The partition 12 is in a slightly inclined state, separating the raw material conveying pipeline 1. A working port 16 is provided at the bottom of the raw material conveying pipeline 1 near its outlet, and the bottom of the partition 12 is hinged to the edge of the working port 16 on one side facing the inlet of the raw material conveying pipeline 1. A limiting ring 17 is provided at the bottom of the working port 16, and the limiting ring 17 is located in the fluff collection bin 2. The limiting ring 17 is used to limit the slider 14 when the slider is reset to prevent the slider 14 from impacting the connecting rod mechanism and causing damage to the connecting rod mechanism.

[0030] The slide rail 15 is fixed on the bottom of the fluff collecting bin 2, and the bottom of the slider 15 is mounted on the slide rail 14. A semicircular guide groove 22 is provided on the top of the slider 15, and the diameter of the guide groove 22 is slightly larger than the outer diameter of the raw material conveying pipeline 1. A second clearance groove 18 is provided at the bottom of the guide groove 22, and when the slider 14 slides below the hinged ear 9, a pair of hinged ears 9 are located in the second clearance groove 18. The spring 13 is located between the slider 14 and the base 11, and the two ends of the spring 13 are fixedly connected to the slider 14 and the base 11 respectively.

[0031] The connecting rod mechanism includes a first connecting rod 19, a second connecting rod 20 and a third connecting rod 21. The first connecting rod 19 passes through the working port 16, and the second connecting rod 20 and the third connecting rod 21 are both located in the fluff collecting bin 2. One end of the first connecting rod 19 is hinged to the center of the partition 12, and the other end of the first connecting rod 19 is hinged to one end of the second connecting rod 20 and the third connecting rod 21 respectively. One end of the second connecting rod 20 is hinged to the base 11, and the other end of the third connecting rod 21 is hinged to the slider 14.

[0032] The plastic granule raw material is transported from left to right along the raw material transport pipeline 1. When the raw material is not transported, the partition 12 is in a slightly inclined state, blocking and separating the raw material transport pipeline 1. Figure 1 When the granular raw material needs to be transported, the vacuum pump starts to work, and the vacuum pump draws the part of the raw material conveying pipeline 1 located on the right side of the partition 12 into a vacuum state. The air pressure on the left side of the partition 12 is greater than that on the right side, and the air pressure pushes the partition 12 to rotate rightward (i.e., clockwise). During the rightward rotation of the partition 12, the first connecting rod 19 is pushed downward, and the first connecting rod 19 pushes the third connecting rod 21 to move leftward, thereby pushing the slider 14 to slide leftward, and the spring 13 is continuously extended.

[0033] When the slider 14 slides to the left along the bottom of the raw material conveying pipeline 1, when the slider 14 hits the push block 7, the slider 14 pushes the push block 7 to rotate to the left (i.e., rotate clockwise), and the push block 7 drives the filter screen 3 to rotate to the right. When the partition 12 rotates to a horizontal state, the partition 12 seals the working port 16. At the same time, when the filter screen 3 just rotates to a vertical state, Figure 2 As shown. Due to the presence of the limit block 10, the filter screen 3 cannot continue to rotate. At this time, the push block 7 and the connecting block 6 form an L-shaped structure located in the first clearance groove 5, and the slider 14 is located directly below the drop opening 4 and seals the drop opening 4. Then the granular raw material passes through the mesh of the filter screen 3, and the conveyed fluff is filtered and intercepted by the filter screen 3. Due to the presence of the slider 14, the granular raw material will not fall from the drop opening 4. During the conveying process of the granular raw material, the partition 12 is always in a horizontal state under the action of the gravity of the granular raw material, and the filter screen 3 is always in a vertical state for filtering.

[0034] When it is necessary to stop conveying the granular raw material, the vacuum pump stops. The right side of the partition 12 returns to normal atmospheric pressure, and the gravity of the granular raw material is lost. The spring 13 returns to its original length from the extended state, and the spring 13 pulls the slider back to the initial position, and restores the partition 12 to the vertical state through the connecting rod mechanism. Under the action of gravity, the filter screen 3 returns to its initial state, and the filter screen 3 falls to the bottom of the raw material conveying pipeline, and the conveyed fluff on the filter screen 3 falls into the fluff collection bin 2 below.

Claims

1. A plastic conveying lint filtering device capable of automatic cleaning, comprising a raw material conveying pipeline, characterized in that: It also includes a filter assembly, a fluff collection bin and a rotating drive mechanism. The fluff collection bin is located directly below the raw material delivery pipeline near its outlet end, and the fluff collection bin is fixedly connected to the raw material delivery pipeline. The filter assembly includes a filter screen, which is circular, and the diameter of the filter screen matches the inner diameter of the raw material delivery pipeline. A limit block is provided on the top of the raw material delivery pipeline, and the bottom of the filter screen is hinged to the raw material delivery pipeline. When the rotary drive mechanism is not working, the filter screen conflicts with the bottom of the raw material conveying pipeline. When the rotary drive mechanism is working, the rotary drive mechanism can drive the filter screen to rotate along a plane parallel to the axis of the raw material conveying pipeline until the filter screen rotates to a vertical state. The filter screen seals the raw material conveying pipeline and the filter screen is limited by a limit block.

2. The automatic cleaning plastic conveying lint filtering device according to claim 1 is characterized in that: The bottom of the raw material conveying pipeline is provided with a drop-off port for collecting lint, and the filter assembly also includes a hinge, which includes a connecting block, which is connected to the side wall of the filter screen, and the connecting block and the filter screen are distributed on the same plane. A rotating shaft is provided on the side of the connecting block facing away from the filter screen, and the rotating shaft is perpendicular to the axis of the raw material conveying pipeline. A pair of hinged ears are symmetrically provided on the outer side wall of the bottom of the raw material conveying pipeline, and a first give-way groove is provided on the raw material conveying pipeline, and the first give-way groove is connected to the drop-off port. The connecting block passes through the first give-way groove, and the two ends of the rotating shaft are respectively rotatably connected to the two hinged ears, and the rotating drive mechanism can drive the connecting block to rotate.

3. The automatic cleaning plastic conveying lint filtering device according to claim 2 is characterized in that: The hinged member also includes a push block, one side edge of the push block is connected to the one side edge of the connecting block, and the push block and the connecting block form an L-shaped structure.

4. The automatic cleaning plastic conveying lint filtering device according to claim 2 or 3, characterized in that: The rotary drive mechanism includes a base, a partition, a connecting rod mechanism, a spring, a slider and a slide rail. The partition is circular, and the diameter of the partition matches the inner diameter of the raw material conveying pipeline. A working port is opened at the bottom of the raw material conveying pipeline. The bottom of the partition is hinged to one side edge of the working port. The partition separates the raw material conveying pipeline. The bottom of the base is fixed to the bottom of the fluff collecting bin, the slide rail is fixed to the bottom of the fluff collecting bin, the bottom of the slider is installed on the slide rail, the spring is located between the slider and the base, and the two ends of the spring are respectively fixedly connected to the slider and the base. The connecting rod mechanism runs through the working port, and the connecting rod mechanism is respectively hinged to the center of the partition, the base and the slider; The partition can rotate along a plane parallel to the axis of the raw material conveying pipeline, and push the slider to slide along the axis of the raw material conveying pipeline. When the slider slides toward the filter, the slider can push the filter to rotate. When the partition rotates to a horizontal state, the partition seals the working port. At this time, the filter is in a vertical state and seals the raw material conveying pipeline, and the slider seals the drop port.

5. The automatic cleaning plastic conveying lint filtering device according to claim 4 is characterized in that: A semicircular guide groove is provided on the top of the slider, the diameter of which matches the outer diameter of the raw material conveying pipeline, and a second yield groove for accommodating a pair of hinged ears is provided at the bottom of the guide groove. When the slider slides toward the filter screen, the slider contacts the push block and pushes the push block to rotate, thereby rotating the filter screen.

6. The automatic cleaning plastic conveying lint filtering device according to claim 4 is characterized in that: The connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod runs through the working port, the second connecting rod and the third connecting rod are both located in the fluff collection bin, one end of the first connecting rod is hinged to the center of the partition, the other end of the first connecting rod is hinged to one end of the second connecting rod and the third connecting rod respectively, one end of the second connecting rod is hinged to the base, and the other end of the third connecting rod is hinged to the slider.

7. The automatic cleaning plastic conveying lint filtering device according to claim 4 is characterized in that: A limiting ring is provided at the bottom of the working opening, and the limiting ring is located in the fluff collecting bin.

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