A hot wash apparatus for light plastics scrap

Abstract

The application discloses a hot washing device for light plastic chips, which comprises a tank body, a forced feeding mechanism and a pressing mechanism, the tank body is internally provided with a containing cavity, an overflow port is formed in the upper end of the tank body and is communicated with the containing cavity, the forced feeding mechanism comprises a feeding cylinder, a spiral and a rotating driving piece, and the pressing mechanism comprises a pressing plate and a pressing driving piece. The hot washing device for light plastic chips has the beneficial effect that the pressing driving piece drives the pressing plate to reciprocate up and down, when the pressing driving piece moves downward, the plastic chips are pressed into the lower part of the tank body again, so that the plastic chips reciprocate up and down in the tank body, the staying time of the plastic chips in the hot water is prolonged, and the hot washing effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot washing of plastic chips, in particular to a hot washing device for light plastic chips. BACKGROUND

[0002] Plastic bottles are widely used in daily life. They do bring a lot of convenience to people's life, but at the same time, there are more and more plastic bottle garbage. Recycling plastic bottles can effectively reduce the number of plastic garbage, reduce the use of landfill sites and waste incineration sites, and thus reduce pollution and odor. Through recycling, plastic bottles no longer enter the natural environment, thereby reducing environmental pollution, reducing the production of new plastic, and further reducing environmental pressure.

[0003] The plastic bottle recycling method is to first crush the plastic bottles into plastic chips by a crusher. The plastic chips become clean plastic chips after screening, hot washing, drying and other steps, for melting processing into various plastic products.

[0004] Among them, in the hot washing stage of the plastic chips, it is mainly used to remove the attachments on the surface of the plastic chips by hot washing. However, for light plastic chips, since the density of light plastic chips is lower than water, light plastic chips are easy to float in hot water, and the residence time in hot water is too short, so the washing effect is not good. In the prior art, light plastic chips are forced to pass into the bottom of the hot washing tank by feeding screw forced feeding, and the plastic chips are hot washed during the rising process. However, in this way, the residence time of the plastic chips in the hot water is limited to the rising process, and the residence time of the plastic chips in the hot water is still short, and it is still difficult to achieve good cleaning effect for stains with strong adhesion. SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a hot washing device for light plastic chips to solve the technical problem of short residence time of light plastic chips in the hot washing tank in the prior art.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] The present application provides a hot washing device for light plastic chips, comprising:

[0008] A tank body having a containing cavity in the tank body, an overflow port is formed in the upper end of the tank body and communicates with the containing cavity;

[0009] A forced feeding mechanism includes a feeding cylinder, a screw, and a rotating driving member, the feeding cylinder is vertically fixed to the tank body, the lower end of the feeding cylinder extends into the lower part of the accommodating cavity, the screw is rotatably arranged in the feeding cylinder, and the rotating driving member is connected with the screw and used for driving the screw to rotate.

[0010] A pressing mechanism includes a pressing plate and a pressing driving member, the pressing plate is slidably arranged between the feeding cylinder and the inner wall of the tank body, a plurality of first sieve holes are formed in the pressing plate, and the pressing driving member is used for driving the pressing plate to move up and down.

[0011] In some embodiments, the upper end of the feeding cylinder is provided with an inlet.

[0012] In some embodiments, the forced feeding mechanism further includes a rotating shaft, the rotating shaft is rotatably arranged at the center of the feeding cylinder, the rotating shaft is fixedly connected with the screw, and the rotating driving member is connected with the rotating shaft and used for driving the rotating shaft to rotate.

[0013] In some embodiments, the rotating driving member is a rotating driving motor, the rotating driving motor is connected with the rotating shaft and used for driving the rotating shaft to rotate.

[0014] In some embodiments, a through hole is formed in the center of the pressing plate and is adapted to the cross-sectional shape of the feeding cylinder, the pressing plate is slidably connected with the feeding cylinder through the through hole, and the outer edge of the pressing plate is matched with the inner wall of the tank body.

[0015] In some embodiments, the pressing driving member is a pressing driving cylinder, the cylinder body of the pressing driving cylinder is fixed to the tank body, the output shaft of the pressing driving cylinder is fixedly connected with the pressing plate and used for driving the pressing plate to move up and down.

[0016] In some embodiments, the upper end of the tank body is provided with a liquid supplementing port which is in communication with the accommodating cavity, and the hot washing device for light plastic debris further includes a heater, and the heater is arranged in the tank body.

[0017] In some embodiments, a material blocking mechanism is further included, the material blocking mechanism includes a blocking cover and a plurality of valve bodies, the blocking cover is fixed between the feeding cylinder and the inner wall of the tank body and is located below the pressing plate, the blocking cover divides the accommodating cavity into a lower accommodating cavity and an upper accommodating cavity which are not in communication with each other, a plurality of through ports corresponding to the valve bodies are formed in the blocking cover, and the valve bodies are installed at the corresponding through ports.

[0018] In some embodiments, the stirring mechanism comprises a plurality of first air nozzles and a first air pump, the outlet of each of the first air nozzles is arranged in the upper accommodating cavity and fixed to the inner wall of the tank body, and the inlet of each of the first air nozzles is in communication with the outlet of the first air pump.

[0019] In some embodiments, the distributing mechanism comprises a plurality of second air nozzles and a second air pump, the outlet of each of the second air nozzles is arranged in the accommodating cavity and below the feeding barrel, and the inlet of each of the second air nozzles is in communication with the outlet of the second air pump.

[0020] Compared with the prior art, the hot washing device for light plastic debris has the beneficial effects that: in use, the plastic debris is introduced into the upper end of the feeding barrel, the rotating driving member is turned on to drive the spiral to move downward with the mixture of the plastic debris and water, the plastic debris is discharged from the lower end of the feeding barrel, and then floats upward under the action of buoyancy, the hot water in the tank body can clean the plastic debris in the floating process, at the same time, the pressure plate reciprocates upward and downward by the pressure driving member, when the pressure driving member moves downward, the plastic debris is pressed into the lower part of the tank body again, so that the plastic debris reciprocates upward and downward in the tank body, the residence time of the plastic debris in the hot water is prolonged, and the hot washing effect is improved, when the plastic debris needs to be discharged, the pressure plate is moved above the water surface by the pressure driving member, at this time, the plastic debris floats to the surface of the water body, and then is discharged from the overflow port. Therefore, the hot washing time of the plastic debris can be controlled by the device, different hot washing times are selected according to different stain conditions, and the unity of the hot washing effect and the hot washing efficiency is realized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of the hot washing device for light plastic debris provided by an embodiment of the present application;

[0022] Figure 2 is a structural schematic view of the forced feeding mechanism in Figure 1 ;

[0023] Figure 3 is a structural schematic view of the blocking mechanism in Figure 1 ;

[0024] Figure 4 is a partial enlarged view of the area A in Figure 1 ;

[0025] Figure 5 is a structural schematic view of the hot washing device for light plastic debris in Figure 1 when the pressure plate moves to the lowest position;

[0026] Figure 6 is Figure 1 structure diagram of the heat washing device for light plastic chips in the overflow port when the pressing plate moves above the overflow port;

[0027] Reference signs: 1 - tank body, 11 - overflow port, 12 - liquid supplementing port, 2 - forced feeding mechanism, 21 - feeding cylinder, 211 - feeding port, 22 - screw, 23 - rotating driving part, 24 - rotating shaft, 3 - pressing mechanism, 31 - pressing plate, 32 - pressing driving part, 4 - heater, 5 - material blocking mechanism, 51 - material blocking cover, 511 - through port, 52 - valve body, 6 - stirring mechanism, 61 - first air nozzle, 7 - material distributing mechanism, 71 - second air nozzle. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0029] In order to solve the technical problem that light plastic chips stay in the heat washing tank for a short time and are difficult to be effectively cleaned, the present application provides a heat washing device for light plastic chips, which can prolong the residence time of light plastic chips in the heat washing tank and thus effectively clean the light plastic chips.

[0030] It should be noted that the heat washing device for light plastic chips is used in, but not limited to, plastic chip heat washing equipment and the like. For the convenience of description, in the present application, the heat washing device for light plastic chips is only taken as an example to be applied to the plastic chip heat washing equipment, and the principle of the heat washing device for light plastic chips applied to other types of equipment is substantially the same as that applied to the plastic chip heat washing equipment, which is not described herein.

[0031] Please refer to Figure 1 , Figure 1 is a structure diagram of the heat washing device for light plastic chips in an embodiment of the present application. The heat washing device for light plastic chips comprises a tank body 1, a forced feeding mechanism 2 and a pressing mechanism 3.

[0032] Please refer to Figures 1-6 , the tank body 1 has a containing cavity therein, and an overflow port 11 is formed in the upper end of the tank body 1 and communicates with the containing cavity.

[0033] The forced feeding mechanism 2 comprises a feeding cylinder 21, a screw 22 and a rotating driving part 23. The feeding cylinder 21 is vertically fixed to the tank body 1, the lower end of the feeding cylinder 21 extends into the lower part of the containing cavity, the screw 22 is rotationally arranged in the feeding cylinder 21, and the rotating driving part 23 is connected with the screw 22 and is used to drive the screw 22 to rotate.

[0034] The pressing mechanism 3 comprises a pressing plate 31 and a pressing driving element 32, the pressing plate 31 is slidingly arranged between the feeding cylinder 21 and the inner wall of the tank body 1, a plurality of first screen holes are formed on the pressing plate 31, the size of the first screen hole is smaller than the minimum diameter of the plastic chips, the pressing driving element 32 is used for driving the pressing plate 31 to move up and down.

[0035] In use, the plastic chips are put into the upper end of the feeding cylinder 21, the rotating driving element 23 is turned on, the rotating driving element 23 drives the spiral 22 to rotate, the spiral 22 drives the mixture of the plastic chips and water to move downward, the plastic chips are discharged from the lower end of the feeding cylinder 21, then the discharged plastic chips float upward under the action of the buoyancy, the hot water in the tank body 1 can clean the plastic chips in the floating process, at the same time, the pressing driving element 32 drives the pressing plate to reciprocate up and down, when the pressing driving element 32 moves downward, the plastic chips will be pressed into the lower part of the tank body 1 again, so that the plastic chips will move up and down in the tank body 1 repeatedly, the residence time of the plastic chips in the hot water is prolonged, and the hot washing effect is improved, when it is needed to discharge the plastic chips, the pressing plate 31 is moved above the water surface by the pressing driving element 32 (such as Figure 6 ), at this time, the plastic chips will float to the water surface, and then be discharged from the overflow port 11. Therefore, the hot washing time of the plastic chips can be controlled by the device, different hot washing times are selected according to different stain conditions, so that the hot washing effect and the hot washing efficiency are unified.

[0036] In one of the embodiments, please refer to Figure 1 and Figure 2 , the upper end of the feeding cylinder 21 is provided with a feeding port 211, the feeding port 211 is used for putting in the plastic chips, in the embodiment, the plastic chips are conveyed by airflow. A plurality of second screen holes are formed on the side wall of the feeding cylinder 21, the size of the second screen hole is smaller than the minimum diameter of the plastic chips, so that the water in the tank body 1 can enter the feeding cylinder 21.

[0037] In one of the embodiments, please refer to Figure 1 and Figure 2 , the forced feeding mechanism 2 further comprises a rotating shaft 24, the rotating shaft 24 is rotationally arranged at the center of the feeding cylinder 21, the rotating shaft 24 is fixedly connected with the spiral 22, the rotating driving element 23 is connected with the rotating shaft 24 and is used for driving the rotating shaft 24 to rotate, so as to drive the spiral 22 to rotate.

[0038] In one of the embodiments, please refer to Figure 1 and Figure 2 , the rotating driving element 23 is a rotating driving motor, the rotating driving motor is connected with the rotating shaft 24 and is used for driving the rotating shaft 24 to rotate.

[0039] In one of the embodiments, referring to Figure 1 , the center of the pressing plate 31 is provided with a through hole which is adapted to the cross-sectional shape of the feeding cylinder 21, the pressing plate 31 is slidably connected with the feeding cylinder 21 via the through hole, and the outer edge of the pressing plate 31 is in conformity with the inner wall of the tank 1. In this embodiment, the tank 1 is cylindrical, the cross-section of the feeding cylinder 21 is circular, and the pressing plate 31 is annular. When the pressing plate 31 moves downward, it can drive the plastic debris in the annular area between the feeding cylinder 21 and the inner wall of the tank 1 to move downward.

[0040] In one of the embodiments, referring to Figure 1 , the pressing driving member 32 is a pressing driving cylinder, the cylinder body of the pressing driving cylinder is fixed to the tank 1, and the output shaft of the pressing driving cylinder is fixedly connected with the pressing plate 31 and is used to drive the pressing plate 31 to move up and down.

[0041] In one of the embodiments, referring to Figure 1 , the upper end of the tank 1 is provided with a liquid supplementing port 12 which is in communication with the containing cavity, clean water with detergent is continuously supplemented into the tank 1 through the liquid supplementing port 12, so that the liquid level in the tank 1 is always kept at the height of the overflow port 11, and the hot washing device for light plastic debris further comprises a heater 4 which is arranged in the tank 1 and is used to heat the water in the tank 1.

[0042] In one of the embodiments, referring to Figure 1 and Figure 3 , the hot washing device for light plastic debris further comprises a material blocking mechanism 5, the material blocking mechanism 5 comprises a material blocking cover 51 and a plurality of valve bodies 52, the material blocking cover 51 is fixed between the feeding cylinder 21 and the inner wall of the tank 1 and is located below the pressing plate 31, the material blocking cover 51 divides the containing cavity into a lower containing cavity and an upper containing cavity which are not in communication with each other, a plurality of through ports 511 which are in one-to-one correspondence with the valve bodies 52 are formed in the material blocking cover 51, and the valve bodies 52 are installed at the corresponding through ports 511.

[0043] In use, the plastic scraps are fed into the upper end of the feeding cylinder 21, the rotating drive 23 is turned on to rotate the screw 22, the screw 22 drives the mixture of plastic scraps and water to move downwards, the plastic scraps are discharged from the lower end of the feeding cylinder 21, then float upwards under the action of buoyancy, each valve body 52 is opened, the plastic scraps float upwards and enter above the baffle cover 51 through the valve body 52, the valve body 52 is closed after a period of time, the pressing plate 31 is driven to reciprocate up and down by the pressing drive 32, when the pressing drive 32 moves downwards, the plastic scraps are pressed again into the vicinity above the baffle cover 51, so that the plastic scraps move up and down in the upper containing cavity, the residence time of the plastic scraps in the hot water is prolonged, and the hot washing effect is improved, when it is necessary to discharge the plastic scraps, the pressing plate 31 is moved above the water surface (such as Figure 6 ) by the pressing drive 32, at this time, the plastic scraps float to the water surface and are discharged from the overflow port 11; after the discharging is completed, the pressing plate 31 is moved downwards below the overflow port 11, then the valve body 52 is opened again, so that the plastic scraps below the baffle cover 51 enter above the baffle cover 51 again, and the previous steps are repeated, so that the hot washing of the plastic scraps entering above the baffle cover 51 in batches can be continuously carried out, and the hot washing effect can be ensured.

[0044] In the embodiment, the baffle mechanism 5 is arranged to prevent the plastic scraps that have not been rinsed by multiple up-and-down movements from being directly discharged from the overflow port 11 when the pressing plate 31 moves above the water surface, the plastic scraps can be batched into the baffle cover 51 for cleaning, and then discharged, so that the situation that the plastic scraps are directly discharged without multiple cleaning is avoided.

[0045] In one of the embodiments, please refer to Figure 1 , the hot washing device for light plastic scraps further comprises a stirring mechanism 6, the stirring mechanism 6 comprises a plurality of first air nozzles 61 and a first air pump, the outlet of each first air nozzle 61 is arranged in the upper containing cavity and fixed to the inner wall of the tank body 1, the inlet of each first air nozzle 61 is in communication with the outlet of the first air pump, during cleaning, high-pressure gas is pumped by the first air pump and sprayed from each first air nozzle 61, so as to drive the plastic scraps in the tank body 1 to stir, and the cleaning effect of the plastic scraps is improved.

[0046] In one of the embodiments, please refer to Figure 1 and Figure 4The material distribution mechanism 7 comprises a plurality of second air nozzles 71 and a second air pump, the outlet of each second air nozzle 71 is arranged in the accommodating cavity and below the feeding cylinder 21, and the inlet of each second air nozzle 71 is communicated with the outlet of the second air pump. By arranging the second air nozzle 71, the plastic debris can be prevented from gathering below the feeding cylinder 21, the dispersion of the plastic debris in the horizontal direction is improved, and the cleaning effect is improved.

[0047] For better understanding of the present application, the following Figures 1 to 6 The technical scheme of the present application is described in detail as follows: in use, the plastic debris is introduced into the upper end of the feeding cylinder 21, the rotating driving member 23 is turned on, the rotating driving member 23 drives the spiral 22 to rotate, the spiral 22 drives the mixture of the plastic debris and water to move downward, the plastic debris is discharged from the lower end of the feeding cylinder 21, and then the plastic debris is floated upward under the action of the buoyancy, each valve body 52 is turned on, the plastic debris is introduced into the upper part of the material blocking cover 51 through the valve body 52, the valve body 52 is closed after a period of time, the pressing plate 31 is driven to reciprocate upward and downward by the pressing driving member 32, and the plastic debris is pressed into the vicinity of the upper part of the material blocking cover 51 again when the pressing driving member 32 moves downward, so that the plastic debris moves upward and downward in the upper accommodating cavity, the residence time of the plastic debris in the hot water is prolonged, and the hot washing effect is improved. When the plastic debris needs to be discharged, the pressing plate 31 is moved to above the water surface (for example Figure 6 ) by the pressing driving member 32, at this time, the plastic debris is floated to the surface of the water body, and then discharged from the overflow port 11; after the discharging is completed, the pressing plate 31 is moved downward to below the overflow port 11, and then the valve body 52 is turned on again, so that the plastic debris below the material blocking cover 51 enters the upper part of the material blocking cover 51 again, and the previous steps are repeated, so that the hot washing of the plastic debris in each batch entering the upper part of the material blocking cover 51 can be continuously carried out, and the hot washing effect can be ensured.

[0048] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A hot wash apparatus for light plastics scrap, characterized in that, The utility model provides a light plastic debris hot washing device, which comprises a tank body, a forced feeding mechanism, a pressing mechanism, a blocking mechanism and a distributing mechanism. The tank body is internally provided with a containing cavity, and an overflow port is formed in the upper end of the tank body and communicates with the containing cavity. The forced feeding mechanism comprises a feeding cylinder, a screw and a rotating driving element. The feeding cylinder is vertically fixed to the tank body, the lower end of the feeding cylinder extends into the lower part of the containing cavity, the screw is rotatably arranged in the feeding cylinder, and the rotating driving element is connected with the screw and used for driving the screw to rotate. The pressing mechanism comprises a pressing plate and a pressing driving element. The pressing plate is slidably arranged between the feeding cylinder and the inner wall of the tank body, a plurality of first sieve holes are formed in the pressing plate, and the pressing driving element is used for driving the pressing plate to move up and down.

2. The hot wash apparatus for light plastic scrap according to claim 1, wherein, The blocking mechanism comprises a blocking cover and a plurality of valve bodies.

3. The hot wash apparatus for light plastic scrap according to claim 1, wherein, The blocking cover is fixed between the feeding cylinder and the inner wall of the tank body and located below the pressing plate.

4. The hot wash apparatus for light plastic scrap according to claim 3, wherein, The blocking cover divides the containing cavity into a lower containing cavity and an upper containing cavity which are not communicated with each other.

5. The hot wash apparatus for light plastic scrap according to claim 1, wherein, A plurality of through openings corresponding to the valve bodies are formed in the blocking cover.

6. The hot wash apparatus for light plastic scrap according to claim 1, wherein, The valve bodies are installed at the through openings.

7. The hot wash apparatus for light plastic scrap according to claim 1, wherein, The distributing mechanism comprises a plurality of second air nozzles and a second air pump.

8. The hot wash apparatus for light plastic scrap according to claim 1, wherein, The outlet of each second air nozzle is arranged in the containing cavity and located below the feeding cylinder. The inlet of each second air nozzle is communicated with the outlet of the second air pump. An inlet port is formed in the upper end of the feeding cylinder. The forced feeding mechanism further comprises a rotating shaft which is rotatably arranged at the center of the feeding cylinder. The rotating shaft is fixedly connected with the screw. The rotating driving element is connected with the rotating shaft and used for driving the rotating shaft to rotate. The rotating driving element is a rotating driving motor. The rotating driving motor is connected with the rotating shaft and used for driving the rotating shaft to rotate. A through hole corresponding to the cross-sectional shape of the feeding cylinder is formed in the center of the pressing plate. The pressing plate is slidably connected with the feeding cylinder through the through hole. The outer edge of the pressing plate is matched with the inner wall of the tank body. The pressing driving element is a pressing driving cylinder. The cylinder body of the pressing driving cylinder is fixed to the tank body. The output shaft of the pressing driving cylinder is fixedly connected with the pressing plate and used for driving the pressing plate to move up and down. A liquid supplementing port is formed in the upper end of the tank body and communicated with the containing cavity. The light plastic debris hot washing device further comprises a heater which is arranged in the tank body. The stirring mechanism comprises a plurality of first air nozzles and a first air pump. The outlet of each first air nozzle is arranged in the upper containing cavity and fixed to the inner wall of the tank body. The inlet of each first air nozzle is communicated with the outlet of the first air pump.

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