CN221912733U - Extruder with preheat function - Google Patents

Abstract

The utility model belongs to the technical field of extruders, and particularly relates to an extruder with a preheating function, which comprises an extruder main body, a preheating box and a preheating cavity, wherein the extruder main body comprises a stuffing box, a charging barrel, a heating cavity and a heating device, the outer ring of the charging barrel is provided with the heating cavity, the heating cavity is internally provided with the heating device, the extruder main body is provided with the stuffing box and the preheating box, the preheating box is connected with the charging barrel, an inlet of the preheating box is connected with an outlet of the stuffing box, the preheating box is provided with a circle of preheating cavity, a plurality of copper pipes connected with the heating cavity are arranged in the preheating cavity, and a stirring mechanism is arranged in the preheating box. Compared with the prior art, the extruder can preheat raw materials by utilizing the waste heat of the heating device, fully and uniformly stir the raw materials by using the stirring mechanism, ensure that the raw materials can be uniformly heated in a preheating stage, improve the production efficiency, and simultaneously realize energy conservation and emission reduction and reduce the production cost.

Description

An extruder with preheating function

Technical Field

The utility model belongs to the technical field of extruders, in particular to an extruder with a preheating function.

Background Art

At present, China Patent Publication No. CN202220589625.6 discloses a plastic extruder with a preheating function. By setting a preheating box, a preheating chamber, a spiral conveyor paddle, a sprocket and a chain, it is convenient to preheat the plastic raw material, so that during operation, the staff deposits the plastic raw material into the preheating chamber in advance, and then starts the heating wire inside the preheating box, so that the heating wire heats the liquid inside the preheating box, and then the preheating chamber preheats the plastic raw material inside, so as to improve the working efficiency of the extruder. Although the patent can improve production efficiency, it is necessary to add a second set of heating devices to heat the raw materials on the basis of the existing barrel heating device, thereby increasing the overall energy consumption of the extruder, causing the production cost of the enterprise to increase, which is not in line with the current trend of the industry towards energy conservation and environmental protection. If the residual heat when the heating device heats the barrel can be used to fully and evenly preheat the raw materials in the preheating box, it can achieve energy conservation and emission reduction, as well as reduce production costs while improving production efficiency. Therefore, there is a certain market demand for designing an extruder that can utilize waste heat to preheat raw materials.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the utility model provides an extruder that can utilize the waste heat of a heating device to preheat the raw materials and use a stirring mechanism to evenly stir the raw materials to ensure that the raw materials are evenly preheated, so as to solve the above-mentioned problems.

The utility model discloses an extruder with a preheating function, comprising an extruder body, a preheating box and a preheating cavity, the extruder body comprising a stuffing box, a barrel, a heating cavity and a heating device, the barrel outer ring is provided with a heating cavity, the heating device is provided in the heating cavity, the stuffing box and the preheating box are provided on the extruder body, the preheating box is connected to the barrel, the inlet of the preheating box is connected to the outlet of the stuffing box, the preheating box is provided with a circle of preheating cavity, a plurality of copper tubes connected to the heating cavity are provided in the preheating cavity, and a stirring mechanism is provided in the preheating box.

Furthermore, the stirring mechanism includes an inner ring gear, a main gear, a planetary gear, a stirring rod and a driving unit. The inner ring gear is fixedly arranged on the top of the preheating box, the main gear is rotatably arranged on the axis of the inner ring gear, a number of planetary gears are arranged between the main gear and the inner ring gear, a stirring rod is fixedly arranged at the bottom axis of the main gear and the stirring rod, and a driving unit for driving the main gear to rotate is arranged on the preheating box.

Furthermore, the stirring mechanism also includes a sealed outer ring, a sealed inner ring and a rotating ring. A coaxial sealed outer ring and a sealed inner ring are fixedly arranged at the bottom of the inner gear ring. A rotating ring is rotatably arranged between the sealed outer ring and the sealed inner ring. Both the rotating ring and the sealed inner ring are provided with through holes that cooperate with the stirring rod, and a bearing is arranged between the through hole and the stirring rod.

Furthermore, the stirring rod includes a main stirring rod and a secondary stirring rod. The main stirring rod is arranged at the bottom of the main gear, and a plurality of stirring blades are arranged in an axially rotating array at the bottom of the main stirring rod. The secondary stirring rod is arranged at the bottom of the planetary gear, and a plurality of secondary rods are arranged in an axially rotating array at the bottom of the secondary stirring rod, and the secondary rods are bent and extended upward.

Furthermore, the driving unit includes a driving motor and a reducer, the output shaft of the driving motor is connected to the input end of the reducer, and the output end of the reducer is drivingly connected to the main gear.

Furthermore, a conveying mechanism is provided between the stuffing box and the preheating box.

Furthermore, an exhaust valve connected to the preheating chamber is provided on the top of the preheating box.

Compared with the existing technology, the extruder can use the waste heat of the heating device to preheat the raw materials, and use the stirring mechanism to fully and evenly stir the raw materials, ensuring that the raw materials can be evenly heated during the preheating stage. While improving production efficiency, it can also achieve energy conservation and emission reduction, as well as reduce production costs.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a partial cross-sectional view of the utility model from the front;

FIG3 is an enlarged view of the local detail A in FIG2 ;

Fig. 4 is a left side cross-sectional view of the utility model;

FIG5 is an enlarged view of the local detail B in FIG4 ;

FIG6 is a partial structural schematic diagram of a stirring mechanism;

FIG. 7 is a schematic structural diagram of a stirring mechanism.

In the figure: extruder body 1, preheating box 2, preheating chamber 3, copper tube 301, stuffing box 4, barrel 5, screw 501, heating chamber 6, heating device 7, reduction motor 8, stirring mechanism 9, inner ring 901, main gear 902, planetary gear 903, stirring rod 904, main stirring rod 9041, stirring blade 90411, auxiliary stirring rod 9042, auxiliary rod 90421, driving part 905, driving motor 9051, reduction gear 9052, sealing outer ring 906, sealing inner ring 907, rotating ring 908, bearing 909, conveying mechanism 10, exhaust valve 11, control panel 12.

DETAILED DESCRIPTION

In order to better understand the present invention, the implementation modes of the present invention are explained in detail below with reference to FIGS. 1 to 7 .

It should be noted that the directions of “front, back, left, right, up, and down” described in the text are all based on the directions of “front, back, left, right, up, and down” in FIG. 1 .

The utility model is an extruder with a preheating function, as shown in Figures 1 to 4, the extruder includes an extruder body 1, a preheating box 2 and a preheating chamber 3 in the prior art, wherein the extruder body 1 includes a stuffing box 4, a barrel 5, a heating chamber 6, a heating device 7, a reduction motor 8, a stirring mechanism 9 and a control panel 12. A screw 501 is rotatably arranged in the barrel 5, and the reduction motor 8 drives the screw 501 to rotate in the barrel 5. Since the partial structure of the extruder body 1 is the same as that of the prior art in terms of working principle and is not the main invention of the present application, it will not be explained in detail. On the basis of the prior art, the improved design of the extruder is as follows: a heating chamber 6 is arranged on the outer ring of the barrel 5, a heating device 7 is arranged in the heating chamber 6, a preheating box 2 and a stuffing box 4 are arranged on the extruder body 1, the preheating box 2 is connected to the barrel 5, the outlet of the stuffing box 4 is connected to the inlet of the preheating box 2, the preheating box 2 is provided with a circle of preheating chamber 3, a plurality of copper tubes 301 connected to the heating chamber 6 are arranged in the preheating chamber 3, and a stirring mechanism 9 is arranged in the preheating box 2.

Since the temperature of the outer side of the preheating box 2 near the preheating chamber 3 is higher, the heating speed of the raw materials outside will be much higher than that of the middle part, resulting in insufficient preheating of the raw materials. In order to fully stir the raw materials, as shown in Figures 5 to 7, the stirring mechanism 9 includes an inner gear ring 901, a main gear 902, a planetary gear 903, a stirring rod 904 and a driving part 905. The inner gear ring 901 is fixedly arranged at the top of the preheating box 2, and the main gear 902 is rotatably arranged on the axis of the inner gear ring 901. A plurality of planetary gears 903 are arranged between the main gear 902 and the inner gear ring 901. A stirring rod 904 is fixedly arranged at the bottom axis of the main gear 902 and the planetary gear 903. The preheating box 2 is provided with a driving part 905 for driving the main gear 902 to rotate. The stirring rod 904 includes a main stirring rod 9041 and a sub-stirring rod 9042. The main stirring rod 9041 is arranged at the bottom of the main gear 902. The bottom of the main stirring rod 9041 is provided with a plurality of stirring blades 90411 in an axially rotating array. The sub-stirring rod 9042 is arranged at the bottom of the planetary gear 903. The bottom of the sub-stirring rod 9042 is provided with a plurality of sub-rods 90421 in an axially rotating array. The end of the sub-rod 90421 is bent and extended upward, so that the entire sub-rod 90421 is in an "L" shape. When the driving part 905 drives the main gear 902 to rotate, the planetary gear 903 meshing with it rotates around the main gear 902 and rotates on its own. The auxiliary stirring rod 9042 rotates around the main stirring rod 9041 and rotates on its own. The raw materials near the preheating chamber 3 in the preheating box 2 and the raw materials in the middle are continuously exchanged, and the stirring blades 90411 on the main stirring rod 9041 stir the bottom of the preheating box 2, thereby achieving uniform stirring of the raw materials.

In order to ensure that the gear structure is not affected by the raw materials and does not get stuck, as shown in Figures 5 and 7, the stirring mechanism 9 also includes a sealing outer ring 906, a sealing inner ring 907 and a rotating ring 908, and the gear structure is protected by adding the above-mentioned sealing structure. The bottom of the inner gear ring 901 is fixedly provided with a coaxial sealing outer ring 906 and a sealing inner ring 907, and a rotating ring 908 is rotatably arranged between the sealing outer ring 906 and the sealing inner ring 907. When the planetary gear 903 rotates around the main gear 902, the rotating ring 908 will rotate synchronously with the planetary gear 903. The rotating ring 908 and the sealing inner ring 907 are both provided with through holes that cooperate with the stirring rod 904, and a bearing 909 is provided between the through hole and the stirring rod 904, so that the stirring rod 904 can rotate more smoothly.

The driving unit 905 includes a driving motor 9051 and a reducer 9052 . The output shaft of the driving motor 9051 is connected to the input end of the reducer 9052 . The output end of the reducer 9052 is drivingly connected to the main gear 902 . The output torque of the driving motor 9051 is increased by the reducer 9052 .

A conveying mechanism 10 is provided between the stuffing box 4 and the preheating box 2. As shown in FIG3 , the conveying mechanism 10 is a screw conveyor, which conveys the raw materials in the stuffing box 4 to the preheating box 2 through a screw conveying rod. An exhaust valve 11 connected to the preheating chamber 3 is provided on the top of the preheating box 2. The exhaust valve 11 can be opened to exhaust and release the pressure in the preheating chamber 3, and can also play a role in cooling.

In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An extruder with a preheating function, comprising an extruder body (1), a preheating box (2) and a preheating chamber (3), characterized in that: the extruder body (1) comprises a stuffing box (4), a barrel (5), a heating chamber (6), a heating device (7) and a stirring mechanism (9), the barrel (5) is provided with a heating chamber (6) on its outer ring, the heating chamber (6) is provided with a heating device (7), the extruder body (1) is provided with a preheating box (2) and a stuffing box (4), the preheating box (2) is connected to the barrel (5), the outlet of the stuffing box (4) is connected to the inlet of the preheating box (2), the preheating box (2) is provided with a circle of preheating chamber (3), the preheating chamber (3) is provided with a plurality of copper tubes (301) connected to the heating chamber (6), and the preheating box (2) is provided with a stirring mechanism (9). 2. An extruder with a preheating function as described in claim 1, characterized in that: the stirring mechanism (9) comprises an inner gear ring (901), a main gear (902), a planetary gear (903), a stirring rod (904) and a driving unit (905), the inner gear ring (901) is fixedly arranged at the top of the preheating box (2), the main gear (902) is rotatably arranged on the axis of the inner gear ring (901), a plurality of planetary gears (903) are arranged between the main gear (902) and the inner gear ring (901), a stirring rod (904) is fixedly arranged at the bottom axis of the main gear (902) and the planetary gear (903), and a driving unit (905) for driving the main gear (902) to rotate is arranged on the preheating box (2). 3. An extruder with a preheating function as described in claim 2, characterized in that: the stirring mechanism (9) also includes a sealing outer ring (906), a sealing inner ring (907) and a rotating ring (908), the bottom of the inner gear ring (901) is fixedly provided with a coaxial sealing outer ring (906) and a sealing inner ring (907), the rotating ring (908) is rotatably arranged between the sealing outer ring (906) and the sealing inner ring (907), and the rotating ring (908) and the sealing inner ring (907) are both provided with a through hole that cooperates with the stirring rod (904), and a bearing (909) is arranged between the through hole and the stirring rod (904). 4. An extruder with a preheating function as described in claim 2 or 3, characterized in that: the stirring rod (904) includes a main stirring rod (9041) and a secondary stirring rod (9042), the main stirring rod (9041) is arranged at the bottom of the main gear (902), and a plurality of stirring blades (90411) are arranged at the bottom of the main stirring rod (9041) in an axially rotating array, the secondary stirring rod (9042) is arranged at the bottom of the planetary gear (903), and a plurality of secondary rods (90421) are arranged at the bottom of the secondary stirring rod (9042) in an axially rotating array, and the end of the secondary rod (90421) is bent upward and extended. 5. An extruder with a preheating function as described in claim 2, characterized in that: the driving part (905) includes a driving motor (9051) and a reducer (9052), the output shaft of the driving motor (9051) is connected to the input end of the reducer (9052), and the output end of the reducer (9052) is drivingly connected to the main gear (902). 6. An extruder with a preheating function as described in claim 1, characterized in that a conveying mechanism (10) is provided between the stuffing box (4) and the preheating box (2). 7. An extruder with a preheating function as described in claim 1, characterized in that an exhaust valve (11) connected to the preheating chamber (3) is provided on the top of the preheating box (2).