Plastic raw material preheating equipment based on hot air circulation

Abstract

The utility model provides hot air circulation-based plastic raw material preheating equipment. The hot air circulation-based plastic raw material preheating equipment comprises a mounting frame, a preheating cylinder is fixedly connected to the middle of the mounting frame, a stirring and heating assembly is mounted in the middle of an inner cavity of the preheating cylinder, a filtering assembly is mounted on the upper portion of the inner cavity of the preheating cylinder, a driving motor is fixedly connected to the top face of the preheating cylinder, and a feeding hopper is fixedly connected to the top face of the preheating cylinder. A heating assembly is mounted on the top surface of the mounting frame; the stirring and heating assembly comprises a hollow stirring shaft, the hollow stirring shaft is rotationally connected to the middle of an inner cavity of the preheating cylinder, a U-shaped rod is fixedly connected to the upper portion of the outer surface of the hollow stirring shaft, the two sides of the U-shaped rod make contact with the wall of the inner cavity of the preheating cylinder, and stirring rods are fixedly connected to the middle of the outer surface of the hollow stirring shaft at equal intervals. The preheating cylinder, the stirring and heating assembly, the filtering assembly, the driving motor, the feeding hopper and the heating assembly are matched with one another, so that plastic raw materials can be preheated.

Description

Technical Field

[0001] This utility model relates to the field of plastic raw material preheating technology, specifically to plastic raw material preheating equipment based on hot air circulation. Background Technology

[0002] In the plastics processing industry, preheating of plastic raw materials is a crucial step, aimed at improving the flowability of plastic granules and facilitating subsequent processing and molding. Currently, a common preheating method involves injecting the plastic raw materials into a mixing tank, agitating the materials using a stirring mechanism, and simultaneously injecting hot air into the tank to achieve preheating while stirring.

[0003] However, this preheating method has some drawbacks:

[0004] Existing mixing structures can only agitate plastic raw materials and cannot effectively clean the inner wall of the mixing tank. After prolonged use, plastic particles tend to adhere to the inner wall of the mixing tank, which not only affects the preheating effect of other plastic particles but may also cause damage to the inside of the preheating chamber, reducing the service life of the equipment.

[0005] The patent document with patent number CN220593714U proposes an improved preheating device. This device effectively avoids the problem of plastic particles adhering to the inner wall of the preheating barrel by setting up multiple through slots, elongated plates, guide rods and circular scrapers.

[0006] However, during the preheating process, the hot air emitted by this equipment is usually discharged directly into the workshop environment without treatment. This hot air often contains odors produced by the heating of plastic particles. These odors are not only unpleasant but may also contain harmful substances. Long-term inhalation can have adverse effects on the physical and mental health of workers. At the same time, the direct emission of hot air also results in energy waste. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a plastic raw material preheating device based on hot air circulation, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A preheating device for plastic raw materials based on hot air circulation includes a mounting frame; a preheating cylinder is fixedly connected to the middle of the mounting frame; a stirring and heating assembly is installed in the middle of the inner cavity of the preheating cylinder; a filter assembly is installed in the upper part of the inner cavity of the preheating cylinder; a drive motor is fixedly connected to the top surface of the preheating cylinder; the output end of the drive motor is rotatably connected to the stirring and heating assembly via a sprocket set and a chain; a filter assembly is rotatably connected to the upper surface of the stirring and heating assembly via a sprocket set and a chain; a feed hopper is fixedly connected to the top surface of the preheating cylinder; a heating assembly is installed on the top surface of the mounting frame; the feed end of the heating assembly is connected to the filter assembly; and the output end of the heating assembly is connected to the stirring and heating assembly. The stirring and heating assembly includes a hollow stirring shaft. A hollow stirring shaft is rotatably connected to the center of the preheating cylinder's inner cavity. A U-shaped rod is fixedly connected to the upper part of the outer surface of the hollow stirring shaft. Both sides of the U-shaped rod are in contact with the inner wall of the preheating cylinder. Stirring rods are fixedly connected at equal intervals to the center of the outer surface of the hollow stirring shaft. The inner cavity of the stirring rod communicates with the inner cavity of the hollow stirring shaft. First exhaust holes are provided at equal intervals on both sides of the stirring rod. An inclined stirring rod is fixedly connected to the lower part of the outer surface of the hollow stirring shaft. The inner cavity of the inclined stirring rod communicates with the inner cavity of the hollow stirring shaft. Second exhaust holes are provided on both sides of the inclined stirring rod. One side of the inclined stirring rod communicates with the inner cavity of the preheating cylinder.

[0010] Furthermore, the filter assembly includes a cylindrical filter screen and a square cover. The cylindrical filter screen is fixedly connected to the top surface of the preheating cylinder cavity, and the square cover is fixedly connected to the top surface of the preheating cylinder above the cylindrical filter screen. The square cover communicates with the inside of the cylindrical filter screen.

[0011] Furthermore, the filter assembly also includes a cleaning shaft, which is rotatably connected inside the square cover. A cleaning plate is fixedly connected to the bottom surface of the cleaning shaft, and the top surface of the cleaning plate is in contact with the bottom surface of the cylindrical filter screen. The outer surface of the hollow stirring shaft is rotatably connected to the cleaning shaft through a sprocket assembly and a chain.

[0012] Furthermore, the heating assembly includes a purification component, an air inlet component, and a heating box. The top surface of the mounting bracket is respectively equipped with the purification component, the air inlet component, and the heating box. The input end of the purification component is connected to the inside of the square cover through a return pipe, and the output end of the purification component is connected to the air inlet component through a purification pipe. The output end of the air inlet component is fixedly connected to the heating box through an air supply pipe, and the output end of the heating box is connected to the inner cavity of the hollow stirring shaft through a conveying pipe.

[0013] Furthermore, the purification component includes a purification box, the top surface of the mounting frame is fixedly connected to the purification box, a drying plate and an activated carbon plate are fixedly connected inside the purification box, a return pipe is fixedly connected to the top surface of the purification box, and a purification pipe is fixedly connected to the lower part of one side of the purification box.

[0014] Furthermore, the air inlet component includes an air box, the air box is fixedly connected to the top surface of the mounting bracket, a partition is fixedly connected to the inner cavity of the air box, and an air injection fan is fixedly connected to the top surface of the partition and between the inner cavity walls of the air box.

[0015] This invention provides a preheating device for plastic raw materials based on hot air circulation. Compared with the prior art, it has the following advantages:

[0016] 1. By cooperating with the hollow stirring shaft, stirring rod, U-shaped rod, inclined stirring rod, first exhaust hole and second exhaust hole in the stirring and heating assembly, it is possible to heat the material while stirring, and also prevent plastic particles from adhering to the inner wall of the preheating cylinder during stirring.

[0017] 2. By combining the cylindrical filter screen and the square cover in the filter assembly, the gas discharged from the preheating cylinder can be filtered, preventing the high-temperature gas in the preheating cylinder from carrying impurities and clogging the pipes of the heating assembly during the recirculation.

[0018] 3. The cleaning plate is rotated by the cleaning shaft in the filter assembly, which starts to clean the holes on the bottom of the column filter screen to prevent the column filter screen from becoming clogged and affecting the exhaust.

[0019] 4. Through the cooperation of the purification component, air inlet component, heating box, return pipe, purification pipe and air supply pipe in the heating assembly, hot air can be delivered into the preheating cylinder cavity, and the discharged hot air can be circulated, reducing energy loss.

[0020] 5. By combining the drying plate and activated carbon plate in the purification unit, moisture and odors in the exhaust gas can be removed, preventing the gas generated by the preheating of plastic raw materials from escaping and being inhaled by workers, thus affecting their physical and mental health. Attached Figure Description

[0021] 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.

[0022] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0023] Figure 2 This diagram shows another view of the overall structure of the present invention;

[0024] Figure 3 A partial cross-sectional structural diagram of the preheating cylinder of this utility model is shown;

[0025] Figure 4 This shows a schematic diagram of the preheating cylinder of this utility model from another perspective;

[0026] Figure 5 A partial cross-sectional structural diagram of the heating assembly of this utility model is shown;

[0027] Figure 6 A schematic diagram of the purification component structure of this utility model is shown;

[0028] The diagram shows: 1. Mounting frame; 2. Preheating cylinder; 3. Stirring and heating assembly; 31. Hollow stirring shaft; 32. U-shaped rod; 33. Stirring rod; 34. First exhaust port; 35. Inclined stirring rod; 36. Second exhaust port; 4. Filter assembly; 41. Columnar filter screen; 42. Square cover; 43. Cleaning shaft; 44. Cleaning plate; 5. Drive motor; 6. Feed hopper; 7. Heating assembly; 71. Purification component; 711. Purification box; 712. Drying plate; 713. Activated carbon plate; 72. Air inlet component; 721. Air box; 722. Baffle plate; 723. Air injection fan; 73. Heating box; 74. Return pipe; 75. Purification pipe; 76. Air supply pipe; 77. Conveying pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1

[0031] To address the technical problems in the background section, the following preheating equipment for plastic raw materials based on hot air circulation is provided:

[0032] Combination Figures 1-6As shown, the plastic raw material preheating equipment based on hot air circulation provided by this utility model includes a mounting frame 1; a preheating cylinder 2 is fixedly connected to the middle of the mounting frame 1, a stirring and heating assembly 3 is installed in the middle of the inner cavity of the preheating cylinder 2, a filter assembly 4 is installed on the upper part of the inner cavity of the preheating cylinder 2, a drive motor 5 is fixedly connected to the top surface of the preheating cylinder 2, the output end of the drive motor 5 is rotatably connected to the stirring and heating assembly 3 through a sprocket set and a chain, the upper surface of the stirring and heating assembly 3 is rotatably connected to the filter assembly 4 through a sprocket set and a chain, a feed hopper 6 is fixedly connected to the top surface of the preheating cylinder 2, a heating assembly 7 is installed on the top surface of the mounting frame 1, the feed end of the heating assembly 7 is connected to the filter assembly 4, and the output end of the heating assembly 7 is connected to the stirring and heating assembly 3; The mixing and heating assembly 3 includes a hollow stirring shaft 31. The hollow stirring shaft 31 is rotatably connected to the middle of the inner cavity of the preheating cylinder 2. A U-shaped rod 32 is fixedly connected to the upper part of the outer surface of the hollow stirring shaft 31. The two sides of the U-shaped rod 32 are in contact with the inner cavity wall of the preheating cylinder 2. Stirring rods 33 are fixedly connected at equal intervals to the middle of the outer surface of the hollow stirring shaft 31. The inner cavity of the stirring rod 33 is connected to the inner cavity of the hollow stirring shaft 31. First exhaust holes 34 are provided at equal intervals on both sides of the stirring rod 33. An inclined stirring rod 35 is fixedly connected to the lower part of the outer surface of the hollow stirring shaft 31. The inner cavity of the inclined stirring rod 35 is connected to the inner cavity of the hollow stirring shaft 31. Second exhaust holes 36 are provided on both sides of the inclined stirring rod 35. One side of the inclined stirring rod 35 is connected to the inner cavity of the preheating cylinder 2.

[0033] By cooperating with the hollow stirring shaft 31, stirring rod 33, U-shaped rod 32, inclined stirring rod 35, first exhaust hole 34 and second exhaust hole 36 in the stirring and heating assembly 3, it is possible to heat the material while stirring, and also prevent plastic particles from adhering to the inner wall of the preheating cylinder 2 during stirring.

[0034] In this embodiment, the filter assembly 4 includes a cylindrical filter screen 41 and a square cover 42. The cylindrical filter screen 41 is fixedly connected to the top surface of the inner cavity of the preheating cylinder 2, and the square cover 42 is fixedly connected to the top surface of the preheating cylinder 2 above the cylindrical filter screen 41. The square cover 42 communicates with the inside of the cylindrical filter screen 41. The filter assembly 4 also includes a cleaning shaft 43, which is rotatably connected inside the square cover 42. A cleaning plate 44 is fixedly connected to the bottom surface of the cleaning shaft 43, and the top surface of the cleaning plate 44 is in contact with the bottom surface of the cylindrical filter screen 41. The outer surface of the hollow stirring shaft 31 is rotatably connected to the cleaning shaft 43 through a sprocket assembly and a chain.

[0035] By cooperating with the cylindrical filter screen 41 and the square cover 42 in the filter assembly 4, the gas discharged from the preheating cylinder 2 can be filtered, preventing the high-temperature gas in the preheating cylinder 2 from carrying impurities and clogging the pipes of the heating assembly 7 during the recirculation.

[0036] The cleaning shaft 43 in the filter assembly 4 drives the cleaning plate 44 to rotate, thereby cleaning the holes on the bottom surface of the column filter screen 41 to prevent the column filter screen 41 from becoming clogged and affecting the exhaust.

[0037] Example 2

[0038] like Figures 1-6 As shown, based on the above embodiments, this embodiment further provides the following:

[0039] The heating assembly 7 includes a purification component 71, an air inlet component 72, and a heating box 73. The top surface of the mounting bracket 1 is respectively equipped with the purification component 71, the air inlet component 72, and the heating box 73. The input end of the purification component 71 is connected to the inside of the square cover 42 through the return pipe 74. The output end of the purification component 71 is connected to the air inlet component 72 through the purification pipe 75. The output end of the air inlet component 72 is fixedly connected to the heating box 73 through the air supply pipe 76. The output end of the heating box 73 is connected to the inner cavity of the hollow stirring shaft 31 through the conveying pipe 77.

[0040] By cooperating with the purification component 71, air inlet component 72, heating box 73, return pipe 74, purification pipe 75 and air supply pipe 76 in the heating assembly 7, hot air can be delivered into the inner cavity of the preheating cylinder 2, and the discharged hot air can be circulated, reducing energy loss.

[0041] Example 3

[0042] like Figures 1-6 As shown, based on the above embodiments, this embodiment further provides the following:

[0043] The purification component 71 includes a purification box 711, which is fixedly connected to the top surface of the mounting frame 1. A drying plate 712 and an activated carbon plate 713 are fixedly connected inside the purification box 711. A return pipe 74 is fixedly connected to the top surface of the purification box 711, and a purification pipe 75 is fixedly connected to the lower part of one side of the purification box 711. The air inlet component 72 includes an air box 721, which is fixedly connected to the top surface of the mounting frame 1. A partition 722 is fixedly connected to the inner cavity of the air box 721, and an air injection fan 723 is fixedly connected to the top surface of the partition 722 between the inner cavity walls of the air box 721.

[0044] By combining the drying plate 712 and the activated carbon plate 713 in the purification component 71, the moisture and odor in the exhaust gas can be removed, preventing the gas generated by the preheating of plastic raw materials from overflowing and being inhaled by workers, thus affecting their physical and mental health.

[0045] Working principle and usage process of this utility model:

[0046] In use:

[0047] In operation, the operator first injects the plastic raw material into the preheating cylinder 2 through the feed hopper 6. After injection, the valve in the feed hopper 6 is closed, and the air injection fan 723 and the heating chamber 73 are started. When the air injection fan 723 is working, it begins to inject outside air into the air supply pipe 76, which then injects the air into the heating chamber 73. At this point, the heating rods in the heating chamber 73 begin to heat the injected air. After the air is heated, it is conveyed into the hollow stirring shaft 31 by the conveying pipe 77. At this point, the drive motor 5 is started. The drive motor 5 drives the hollow stirring shaft 31 to rotate via a sprocket and chain. When the hollow stirring shaft 31 rotates, it drives the U-shaped rod 32, the stirring rod 33, and the inclined stirring rod 35 to rotate. When the U-shaped rod 32, the stirring rod 33, and the inclined stirring rod 35 rotate, they begin to stir the plastic raw material in the preheating cylinder 2, preventing plastic particles from adhering to the inner wall of the preheating cylinder 2. During stirring, hot air flows through the hollow stirring shaft 31 into the stirring rod 33 and the inclined stirring rod 35. Finally, the air is discharged through the first exhaust port 34 and the second exhaust port 36. During discharge, it comes into contact with and heats the plastic raw material inside the preheating cylinder 2. The hot air then flows upwards towards the preheating cylinder 2, passing over the column filter 41. Dust and impurities carried in the air are intercepted by the column filter 41. The hot air inside the column filter 41 then passes through the square cover 42 into the return pipe 74, and finally into the purification box 711. At this point, the hot air passes through the drying plate 71. 2 (The drying plate 712 consists of two parts: a breathable mesh plate with a highly absorbent resin placed inside. This absorbs moisture from the high-temperature gas, and the high-temperature gas with absorbed moisture passes through the drying plate 712 to the activated carbon plate 713. At this point, the activated carbon plate 713 begins to remove some of the odor from the high-temperature gas, and the hot air that has removed moisture and odor enters the air box 721. Finally, the air that has been injected also enters the heating box 73, achieving the reuse of heat.)

[0048] When the hollow stirring shaft 31 rotates, it will also drive the cleaning shaft 43 to rotate through the sprocket assembly and chain. When the cleaning shaft 43 rotates, it will drive the cleaning plate 45 to rotate. When the cleaning plate 45 rotates, it will start to clean the column filter screen 41 and prevent the column filter screen 41 from becoming clogged.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plastic raw material preheating device based on hot air circulation, characterized in that: The system includes a mounting frame (1); a preheating cylinder (2) is fixedly connected to the middle of the mounting frame (1); a stirring and heating assembly (3) is installed in the middle of the inner cavity of the preheating cylinder (2); a filter assembly (4) is installed on the upper part of the inner cavity of the preheating cylinder (2); a drive motor (5) is fixedly connected to the top surface of the preheating cylinder (2); the output end of the drive motor (5) is rotatably connected to the stirring and heating assembly (3) through a sprocket set and a chain; the upper surface of the stirring and heating assembly (3) is rotatably connected to the filter assembly (4) through a sprocket set and a chain; a feed hopper (6) is fixedly connected to the top surface of the preheating cylinder (2); a heating assembly (7) is installed on the top surface of the mounting frame (1); the feed end of the heating assembly (7) is connected to the filter assembly (4); and the output end of the heating assembly (7) is connected to the stirring and heating assembly (3). The stirring and heating assembly (3) includes a hollow stirring shaft (31). The hollow stirring shaft (31) is rotatably connected to the middle of the inner cavity of the preheating cylinder (2). A U-shaped rod (32) is fixedly connected to the upper part of the outer surface of the hollow stirring shaft (31). The two sides of the U-shaped rod (32) are in contact with the inner cavity wall of the preheating cylinder (2). Stirring rods (33) are fixedly connected at equal intervals to the middle of the outer surface of the hollow stirring shaft (31). The inner cavity of the stirring rod (33) The hollow stirring shaft (31) is connected to the inner cavity of the stirring rod (33). The two sides of the stirring rod (33) are provided with first exhaust holes (34) at equal intervals. The lower part of the outer surface of the hollow stirring shaft (31) is fixedly connected to the inclined stirring rod (35). The inner cavity of the inclined stirring rod (35) is connected to the inner cavity of the hollow stirring shaft (31). The two sides of the inclined stirring rod (35) are respectively provided with second exhaust holes (36). One side of the inclined stirring rod (35) is connected to the inner cavity of the preheating cylinder (2).

2. The plastic raw material preheating equipment based on hot air circulation according to claim 1, characterized in that: The filter assembly (4) includes a cylindrical filter screen (41) and a square cover (42). The cylindrical filter screen (41) is fixedly connected to the top surface of the inner cavity of the preheating cylinder (2). The square cover (42) is fixedly connected to the top surface of the preheating cylinder (2) and above the cylindrical filter screen (41). The square cover (42) communicates with the inside of the cylindrical filter screen (41).

3. The plastic raw material preheating equipment based on hot air circulation according to claim 2, characterized in that: The filter assembly (4) also includes a cleaning shaft (43), which is rotatably connected inside the square cover (42). A cleaning plate (44) is fixedly connected to the bottom surface of the cleaning shaft (43), and the top surface of the cleaning plate (44) is in contact with the bottom surface of the column filter screen (41). The outer surface of the hollow stirring shaft (31) is rotatably connected to the cleaning shaft (43) through a sprocket set and a chain.

4. The plastic raw material preheating equipment based on hot air circulation according to claim 3, characterized in that: The heating assembly (7) includes a purification component (71), an air inlet component (72), and a heating box (73). The top surface of the mounting bracket (1) is respectively equipped with the purification component (71), the air inlet component (72), and the heating box (73). The input end of the purification component (71) is connected to the inside of the square cover (42) through the return pipe (74). The output end of the purification component (71) is connected to the air inlet component (72) through the purification pipe (75). The output end of the air inlet component (72) is fixedly connected to the heating box (73) through the air supply pipe (76). The output end of the heating box (73) is connected to the inner cavity of the hollow stirring shaft (31) through the conveying pipe (77).

5. The plastic raw material preheating equipment based on hot air circulation according to claim 4, characterized in that: The purification component (71) includes a purification box (711), the top surface of the mounting bracket (1) is fixedly connected to the purification box (711), a drying plate (712) and an activated carbon plate (713) are fixedly connected inside the purification box (711), a return pipe (74) is fixedly connected to the top surface of the purification box (711), and a purification pipe (75) is fixedly connected to the lower part of one side of the purification box (711).

6. The plastic raw material preheating equipment based on hot air circulation according to claim 5, characterized in that: The air inlet component (72) includes a wind box (721), the top surface of the mounting bracket (1) is fixedly connected to the wind box (721), the inner cavity of the wind box (721) is fixedly connected to a partition (722), and the top surface of the partition (722) and located between the inner cavity walls of the wind box (721) are fixedly connected to an air injection fan (723).

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