A raw material mixing and preheating device for pipe production
By combining the double cone rollers and V-shaped tipping plates, the problems of uneven heat and uneven mixing in the plastic particle mixing and preheating device are solved, achieving uniform preheating and mixing of plastic particles and improving the quality of plastic pipes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIDA (SUZHOU) PIPE TECH CO LTD
- Filing Date
- 2025-09-09
- Publication Date
- 2026-08-04
AI Technical Summary
Existing plastic particle mixing and preheating devices suffer from uneven heat distribution and uneven mixing, especially in the central region where particle temperature is low and the outer and inner layers of particles are difficult to replace effectively, resulting in uneven wall thickness and unstable mechanical properties of plastic pipes.
The system employs a combination of a double-cone roller and a V-shaped tilting plate, along with hot air preheating. The rotation of the double-cone roller and the tumbling of the V-shaped tilting plate ensure sufficient replacement and uniform preheating of the particles, thereby improving the mixing uniformity.
This method achieves uniform preheating and mixing of plastic granules, improves the wall thickness uniformity and mechanical property stability of plastic pipes, and reduces energy consumption.
Smart Images
Figure CN224588325U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline production technology, and specifically discloses a raw material mixing and preheating device for pipeline production. Background Technology
[0002] Pipelines are essential devices for transporting gases, liquids, or fluids containing solid particles, and are widely used in water supply and drainage, heating and gas supply, oil and gas transportation, agricultural irrigation, and industrial production. Among these, plastic pipes have seen a steadily increasing share of applications due to their lightweight, corrosion resistance, and ease of installation. Plastic pipes are primarily manufactured using extrusion, a process where plastic particles are heated and melted in an extruder, then extruded through a die and cooled to form a tubular structure. During this process, the plastic particles undergo mixing and preheating. Preheating reduces the melting time of the plastic particles in the extruder, decreases energy consumption, and prevents uneven plasticization caused by excessively low particle temperature, thus ensuring uniform pipe wall thickness and stable mechanical properties.
[0003] In existing technologies, the mixing and preheating of plastic particles are usually completed in the same device, with a common structure being a mixing drum with a heating function. The preheating methods mainly include two types: one is to install heating elements (such as electric heating plates, heating rods, etc.) in the jacket of the mixing drum wall, heating the material through heat conduction from the drum wall; the other is to introduce hot air into the jacket, indirectly heating the material through heat exchange between the hot air and the drum wall. To ensure uniform mixing of the raw materials, these devices are often equipped with horizontal stirring blades, which drive the material to move horizontally through rotation.
[0004] However, the above structure has obvious defects: the heat is mainly concentrated in the outer layer of particles near the cylinder wall, while the movement trajectory of the horizontal stirring blades is limited to the horizontal plane. The particles in the central area move slowly and are rarely pushed towards the cylinder wall, remaining at a low temperature for a long time. The outer and inner layers of particles cannot be effectively exchanged, forming a radial temperature gradient with a cold center and a hot edge, ultimately resulting in uneven heating of the particles as a whole. At the same time, the horizontal stirring has a very weak ability to circulate and exchange materials in the vertical direction, making it difficult for the upper and lower layers of materials to fully interweave, affecting the uniformity of mixing.
[0005] Therefore, a raw material mixing and preheating device for pipeline production is needed to solve the above problems. Utility Model Content
[0006] This utility model proposes a raw material mixing and preheating device for pipeline production. Through the synergistic mixing action of a double cone roller and a V-shaped turning plate, the particles are fully replaced, effectively improving the uniformity of hot air preheating of the particles; at the same time, it improves the uniformity of mixing.
[0007] This utility model is implemented as follows: a raw material mixing and preheating device for pipeline production includes a frame, and a mixing and heating mechanism is provided between the inner and outer sides of the frame.
[0008] The hybrid heating mechanism includes a connecting plate disposed between the inner and outer sides of the frame. A double cone roller is disposed on the right side of the connecting plate. Multiple evenly distributed V-shaped turning plates are fixedly connected to the inner wall of the double cone roller. A connecting cylinder is fixedly connected through the left end of the double cone roller. A load-bearing pipe is fixedly connected to the right end of the connecting plate, passing through the inside of the connecting cylinder and extending into the inside of the double cone roller. Multiple evenly distributed air ducts are connected to the lower side of the load-bearing pipe. A sealed bearing is fixedly connected between the outer wall of the load-bearing pipe and the inner wall of the connecting cylinder. A hot air blower with an air outlet connected to the inside of the load-bearing pipe is installed on the left end of the connecting plate. The hybrid heating mechanism also includes a driving mechanism.
[0009] The inner wall of the frame is rotatably connected to the front and rear sides by a movable shaft that is fixedly connected to the connecting plate. The outer wall of the frame is equipped with a swing hydraulic cylinder whose output end is fixedly connected to the movable shaft. A discharge chute is opened through the lower end of the frame. A discharge pipe with a valve is fixedly connected to the lower end of the frame.
[0010] The right end of the double cone roller is connected to a material inlet, and the outer wall of the material inlet is threadedly connected to a threaded cap.
[0011] As a preferred embodiment of the raw material mixing and preheating device for pipeline production according to this utility model, the driving mechanism includes a gear ring fixedly connected to the outer wall of the connecting cylinder, a rotating shaft rotatably connected to the right end of the connecting plate, a gear meshing with the gear ring fixedly connected to the right end of the rotating shaft, and a drive motor whose output end is fixedly connected to the rotating shaft installed at the left end of the connecting plate.
[0012] As a preferred embodiment of the raw material mixing and preheating device for pipeline production according to this utility model, an exhaust mesh plate is fixedly connected through the outer wall of the threaded cover.
[0013] As a preferred embodiment of the raw material mixing and preheating device for pipeline production according to this utility model, each of the multiple air ducts is fixedly connected with a baffle plate.
[0014] As a preferred embodiment of the raw material mixing and preheating device for pipeline production according to this utility model, the frame body is fixedly connected to a guide frame whose four inner walls are all inclined structures, and the interior of the guide frame is connected to the discharge trough.
[0015] In a preferred embodiment of the raw material mixing and preheating device for pipeline production according to this utility model, the right side of the load-bearing pipe has a closed structure.
[0016] The beneficial effects of this utility model are:
[0017] 1. Start the swing hydraulic cylinder to drive the movable shaft to rotate, so that the double cone drum tilts so that the feeding port faces upward. After adding plastic granules and tightening the threaded cap to seal, the swing hydraulic cylinder resets the double cone drum. Then the drive mechanism drives the connecting cylinder and the double cone drum to rotate. The V-shaped turning plate on the inner wall makes the material continuously turn over, improving the uniformity of mixing.
[0018] 2. Simultaneously start the hot air blower. The hot air is blown into the material inside the double cone drum through the load-bearing pipe and its connected air pipe. The synergistic effect of the rotation of the double cone drum and the V-shaped tipping plate makes the particles fully displaced. Combined with the hot air being blown directly into the material, the hot air achieves uniform preheating of the particles and effectively improves the uniformity of preheating of the particles. Attached Figure Description
[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0020] Figure 1 This is a front sectional view of the raw material mixing and preheating device for pipeline production according to this utility model;
[0021] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;
[0022] Figure 3 This is a partial left-side cross-sectional view of the present invention;
[0023] Figure 4 This is a structural diagram of the double cone roller and feed inlet of this utility model.
[0024] The markings in the diagram are: 1. Frame; 2. Connecting plate; 3. Double cone roller; 4. V-shaped tipping plate; 5. Load-bearing pipe; 6. Connecting cylinder; 7. Sealed bearing; 8. Gear ring; 9. Gear; 10. Rotating shaft; 11. Drive motor; 12. Hot air blower; 13. Air duct; 14. Material baffle plate; 15. Material inlet; 16. Threaded cover; 17. Movable shaft; 18. Swinging hydraulic cylinder; 19. Guide frame; 20. Discharge chute; 21. Discharge pipe. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.
[0026] Please see Figure 1-4A raw material mixing and preheating device for pipeline production includes a frame 1, and a mixing and heating mechanism is provided between the inner and outer sides of the frame 1.
[0027] The mixed heating mechanism includes a connecting plate 2 disposed between the inner and outer sides of the frame 1. A double cone roller 3 is disposed on the right side of the connecting plate 2. Multiple evenly distributed V-shaped turning plates 4 are fixedly connected to the inner wall of the double cone roller 3. A connecting cylinder 6 is fixedly connected through the left end of the double cone roller 3. A load-bearing pipe 5 is fixedly connected to the right end of the connecting plate 2, passing through the inside of the connecting cylinder 6 and extending into the inside of the double cone roller 3. Multiple evenly distributed air ducts 13 are connected to the lower side of the load-bearing pipe 5. A sealed bearing 7 is fixedly connected between the outer wall of the load-bearing pipe 5 and the inner wall of the connecting cylinder 6. A hot air blower 12 with an air outlet connected to the inside of the load-bearing pipe 5 is installed on the left end of the connecting plate 2. The mixed heating mechanism also includes a drive mechanism.
[0028] A movable shaft 17, which is fixedly connected to the connecting plate 2, is rotatably connected between the front and rear sides of the inner wall of the frame 1. A swing hydraulic cylinder 18, whose output end is fixedly connected to the movable shaft 17, is installed on the outer wall of the frame 1. A discharge chute 20 is opened through the lower end of the frame 1. A discharge pipe 21 with a valve is fixedly connected to the lower end of the frame 1.
[0029] The right end of the double cone roller 3 is connected to a material port 15, and the outer wall of the material port 15 is threadedly connected to a threaded cover 16.
[0030] In this embodiment: when a feeding operation is required, the swing hydraulic cylinder 18 is activated, and its output end drives the movable shaft 17 to rotate counterclockwise. The connecting plate 2 will rotate synchronously with the movable shaft 17, thereby causing the double cone roller 3 to tilt, so that the material port 15 at the right end of the double cone roller 3 tilts upward at a certain angle to facilitate feeding. At this time, an appropriate amount of plastic granules are added into the double cone roller 3 from the material port 15. After feeding is completed, the threaded cap 16 is tightened to close the material port 15, and then the output end of the swing hydraulic cylinder 18 drives the movable shaft 17 to rotate clockwise, so that the double cone roller 3 returns to its original position.
[0031] Subsequently, the connecting cylinder 6 is driven to rotate by the drive mechanism, which in turn drives the double cone drum 3 to rotate. When the double cone drum 3 rotates, the multiple V-shaped turning plates 4 on its inner wall will cause the material to continuously turn over, so that the particles inside the double cone drum 3 are constantly replaced, thereby improving the uniformity of mixing.
[0032] At the same time, the hot air blower 12 is started. The hot air generated by the hot air blower 12 enters the interior of the load-bearing pipe 5, and then blows onto the material inside the double cone roller 3 through multiple air ducts 13 connected to the lower side of the load-bearing pipe 5. The height of the material is lower than the height of the air ducts 13. During this process, the synergistic effect of the double cone roller 3 and the V-shaped turning plate 4 makes the particles fully replaced. With the hot air blown directly into the interior of the material from multiple air ducts 13, the uniform preheating of the particles by the hot air is achieved, which effectively improves the uniformity of the preheating of the particles by the hot air.
[0033] After the mixing and heating are completed, the threaded cap 16 needs to be unscrewed, and the swing hydraulic cylinder 18 needs to be started again to drive the movable shaft 17 to rotate clockwise, which in turn drives the connecting plate 2 and the double cone roller 3 to rotate, so that the opening of the material port 15 of the double cone roller 3 faces downward. The material in the double cone roller 3 is discharged from the material port 15 and slides down the guide frame 19 to the discharge trough 20 at the lower end of the frame 1. Then, it is discharged to the feed port of the rear extrusion device through the discharge pipe 21 connected to the discharge trough 20.
[0034] As a technical optimization of this utility model, the driving mechanism includes a gear ring 8 fixedly connected to the outer wall of the connecting cylinder 6, a rotating shaft 10 rotatably connected to the right end of the connecting plate 2, a gear 9 meshing with the gear ring 8 fixedly connected to the right end of the rotating shaft 10, and a drive motor 11 with its output end fixedly connected to the rotating shaft 10 installed on the left end of the connecting plate 2.
[0035] In this embodiment: When the drive mechanism is working, the drive motor 11 starts, and its output end drives the rotating shaft 10 to rotate. The gear 9 at the right end of the rotating shaft 10 rotates with it. Since the gear 9 meshes with the gear ring 8 on the outer wall of the connecting cylinder 6, the rotation of the gear 9 drives the gear ring 8 and the connecting cylinder 6 to rotate synchronously, thereby causing the double cone roller 3 fixed to the connecting cylinder 6 to rotate.
[0036] As a technical optimization of this utility model, an exhaust mesh plate is fixedly connected through the outer wall of the threaded cover 16.
[0037] In this embodiment: the exhaust mesh plate on the outer wall of the threaded cover 16 allows excess gas or water vapor in the double cone roller 3 to be discharged through the exhaust mesh plate.
[0038] As a technical optimization of this utility model, baffle plates 14 are fixedly connected inside the multiple air ducts 13.
[0039] In this embodiment, the baffle plate 14 inside the air duct 13 can prevent materials from entering the air duct 13 and avoid material blockage of the air duct 13.
[0040] As a technical optimization of this utility model, the inside of the frame 1 is fixedly connected to a guide frame 19 with four inclined surfaces on the inner wall, and the inside of the guide frame 19 is connected to the discharge trough 20.
[0041] In this embodiment, the four sides of the inner wall of the guide frame 19 are all inclined structures. The material slides down the inclined surface under the action of gravity, and then enters the discharge trough 20 through the connection between the guide frame 19 and the discharge trough 20.
[0042] As a technical optimization of this utility model, the right side of the load-bearing tube 5 is a closed structure.
[0043] In this embodiment, the right side of the load-bearing pipe 5 is a closed structure, which can prevent leakage from the right end when the hot air blower 12 is sent into the load-bearing pipe 5.
[0044] The working principle and usage process of this utility model are as follows: When a feeding operation is required, the swing hydraulic cylinder 18 is started, and its output end drives the movable shaft 17 to rotate counterclockwise. The connecting plate 2 will rotate synchronously with the movable shaft 17, thereby driving the double cone roller 3 to tilt, so that the material port 15 at the right end of the double cone roller 3 tilts upward at a certain angle to facilitate feeding. At this time, an appropriate amount of plastic granules are added into the double cone roller 3 from the material port 15. After feeding is completed, the threaded cap 16 is tightened to close the material port 15, and then the output end of the swing hydraulic cylinder 18 drives the movable shaft 17 to rotate clockwise, so that the double cone roller 3 returns to its original position.
[0045] Then the drive motor 11 in the drive mechanism is started. The output end of the drive motor 11 drives the rotating shaft 10 and the gear 9 to rotate. Since the gear 9 is meshed with the gear ring 8 on the outer wall of the connecting cylinder 6, the connecting cylinder 6 will rotate with the gear ring 8 and drive the double cone roller 3 to rotate. When the double cone roller 3 rotates, the multiple V-shaped turning plates 4 on its inner wall will cause the material to turn over continuously, so that the particles inside the double cone roller 3 are constantly replaced, improving the uniformity of mixing.
[0046] At the same time, the hot air blower 12 is started. The hot air generated by the hot air blower 12 enters the interior of the load-bearing pipe 5, and then blows onto the material inside the double cone roller 3 through multiple air ducts 13 connected to the lower side of the load-bearing pipe 5. The height of the material is lower than the height of the air ducts 13. During this process, the synergistic effect of the double cone roller 3 and the V-shaped turning plate 4 makes the particles fully replaced. With the hot air blown directly into the interior of the material from multiple air ducts 13, the uniform preheating of the particles by the hot air is achieved, which effectively improves the uniformity of the preheating of the particles by the hot air.
[0047] After the mixing and heating are completed, the threaded cap 16 needs to be unscrewed, and the swing hydraulic cylinder 18 needs to be started again to drive the movable shaft 17 to rotate clockwise, which in turn drives the connecting plate 2 and the double cone roller 3 to rotate, so that the opening of the material port 15 of the double cone roller 3 faces downward. The material in the double cone roller 3 is discharged from the material port 15 and falls into the guide frame 19. Since the four sides of the inner wall of the guide frame 19 are all inclined structures, the material will slide down the guide frame 19 to the discharge trough 20 at the lower end of the frame 1, and then be discharged to the feed port of the rear extrusion device through the discharge pipe 21 connected to the discharge trough 20.
[0048] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0049] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.
Claims
1. A raw material mixing and preheating device for pipeline production, comprising a frame (1), characterized in that: A hybrid heating mechanism is provided between the inside and outside of the frame (1); The hybrid heating mechanism includes a connecting plate (2) disposed between the inner and outer sides of the frame (1). A double cone roller (3) is disposed on the right side of the connecting plate (2). Multiple evenly distributed V-shaped turning plates (4) are fixedly connected to the inner wall of the double cone roller (3). A connecting cylinder (6) is fixedly connected through the left end of the double cone roller (3). A load-bearing pipe (5) is fixedly connected to the right end of the connecting plate (2), passing through the inside of the connecting cylinder (6) and extending into the inside of the double cone roller (3). Multiple evenly distributed air ducts (13) are connected to the lower side of the load-bearing pipe (5). A sealed bearing (7) is fixedly connected between the outer wall of the load-bearing pipe (5) and the inner wall of the connecting cylinder (6). A hot air blower (12) with an air outlet connected to the inside of the load-bearing pipe (5) is installed on the left end of the connecting plate (2). The hybrid heating mechanism also includes a driving mechanism. The inner wall of the frame (1) is rotatably connected to the front and rear sides by a movable shaft (17) that is fixedly connected to the connecting plate (2). The outer wall of the frame (1) is equipped with a swing hydraulic cylinder (18) whose output end is fixedly connected to the movable shaft (17). The lower end of the frame (1) is provided with a discharge trough (20). The lower end of the frame (1) is fixedly connected with a discharge pipe (21) with a valve. The right end of the double cone roller (3) is connected to a material inlet (15), and the outer wall of the material inlet (15) is threadedly connected to a threaded cap (16).
2. The raw material mixing and preheating device for pipeline production according to claim 1, characterized in that: The drive mechanism includes a gear ring (8) fixedly connected to the outer wall of the connecting cylinder (6), a rotating shaft (10) rotatably connected to the right end of the connecting plate (2), a gear (9) meshing with the gear ring (8) fixedly connected to the right end of the rotating shaft (10), and a drive motor (11) whose output end is fixedly connected to the rotating shaft (10) installed on the left end of the connecting plate (2).
3. The raw material mixing and preheating device for pipeline production according to claim 1, characterized in that: An exhaust mesh plate is fixedly connected through the outer wall of the threaded cover (16).
4. The raw material mixing and preheating device for pipeline production according to claim 1, characterized in that: Each of the multiple air ducts (13) has a baffle plate (14) fixedly connected inside.
5. The raw material mixing and preheating device for pipeline production according to claim 1, characterized in that: The frame (1) is fixedly connected to a guide frame (19) with four inclined inner walls, and the inside of the guide frame (19) is connected to the discharge trough (20).
6. The raw material mixing and preheating device for pipeline production according to claim 1, characterized in that: The right side of the load-bearing pipe (5) is a closed structure.