A heating particle mixing prevention device
By mixing particles with different melting points and utilizing turbulence effects and a material cone design, the particle bridging problem was solved, resulting in production stability and equipment reliability, and improved production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUANGSHAN YONGXIN NEW MATERIALS CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-30
AI Technical Summary
In existing technologies, particles are prone to bridging due to adhesion during transportation, leading to production line shutdowns and equipment damage. Existing maintenance window designs require a complete shutdown for handling, affecting production efficiency and equipment lifespan.
By mixing particles with different melting points and utilizing the difference in melting points, a turbulent effect and a spatial skeleton structure are formed. Combined with the design of a material distribution cone, guide plate and distribution bin, the particle dispersion is ensured and adhesion and accumulation are avoided.
It achieves continuous particle dispersion, avoids bridging, improves production smoothness and equipment stability, extends equipment life, and improves production efficiency and product quality.
Smart Images
Figure CN224426079U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of particle mixing devices, specifically a heating particle mixing and anti-blocking device. Background Technology
[0002] In the manufacturing of polymer materials such as plastics processing and film production, particle bridging is a common phenomenon that frequently occurs during processing. Particle bridging refers to the phenomenon where granular raw materials (such as low-temperature resin particles and functional masterbatches) adhere to each other or interact with the inner walls of equipment during the conveying and feeding process, forming arched blockage structures at hoppers, discharge ports, and other locations. This problem is particularly common in the production of low-temperature, high-barrier products (such as food packaging films and pharmaceutical barrier materials). These products require the use of low-temperature particles (thermoplastic resins with low melting points, such as EVA and low-density polyethylene) to lower the heat-sealing temperature. However, low-temperature particles are temperature-sensitive and are prone to surface melting due to localized heating, thus causing bridging.
[0003] Therefore, in the technical practice of solving particle bridging problems, engineers typically install transparent, visual inspection windows in the bends or sections of the pipeline where the cross-section contracts. These windows are constructed using high borosilicate glass or polycarbonate (PC) and are designed to withstand pressure. This design allows operators to quickly locate the arched blockage points formed by particle accumulation through real-time visual monitoring, enabling timely intervention and treatment in the early stages of bridging.
[0004] However, the existing maintenance window solution still has significant limitations: once particle bridging blockage occurs, a complete shutdown procedure must be performed, and the pipeline maintenance port must be disassembled for manual unblocking. This passive maintenance mode not only leads to a significant decrease in production line uptime, but frequent disassembly and assembly also exacerbates metal fatigue at pipeline interfaces, increasing the risk of equipment sealing deterioration.
[0005] Therefore, it is evident that the particle bridging problem still requires further optimization of its solutions at this stage. Utility Model Content
[0006] To avoid and overcome the technical problems existing in the prior art, this utility model provides a heating particle mixing and anti-blocking device. This utility model mixes multiple particles with different melting points used to produce the same product together and feeds them into a particle intake device. The difference in melting points effectively reduces the probability of adhesion between low-melting-point particles of the same type, maintaining continuous particle dispersion and preventing particle bridging.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A heating particle mixing and anti-blocking device includes a feed pipe connected to a particle feeding device with different melting points via multiple branch pipes. A heating pipe is connected to the bottom of the feed pipe, and a distribution bin is installed at the bottom of the heating pipe. The distribution bin is connected to the suction pipe of the particle suction device.
[0009] As a further embodiment of this utility model: a material distribution cone is installed inside the material distribution bin, and the material distribution cone is located on the falling trajectory of the particles and collides with the particles.
[0010] As a further improvement of this utility model, the bulk material cone is located below the vertically arranged heating tube and is arranged coaxially with the heating tube.
[0011] As a further improvement of this utility model, the bottom diameter of the bulk material cone is larger than the inner diameter of the heating tube.
[0012] As a further improvement of this utility model: a support column is installed on the bottom surface of the material distribution cone, and the support column is fixedly installed in the material distribution bin.
[0013] As a further improvement of this utility model, the support column and the bulk material cone are arranged coaxially.
[0014] As a further improvement of this utility model, the material distribution bin is cylindrical and arranged coaxially with the material dispersing cone.
[0015] As a further improvement of this utility model: the wall of the material distribution bin is provided with multiple discharge ports, and the suction pipe is connected to and installed on the material distribution bin through the discharge ports.
[0016] As a further improvement of this utility model, multiple guide plates are installed on the inner wall of the feed pipe to collide with the particles during their fall.
[0017] As a further improvement of this utility model, each guide plate is arranged evenly along a spiral line coaxial with the feed pipe.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. In the negative pressure conveying process, the high-melting-point particles of this invention form a spatial skeleton structure, while the low-melting-point particles are embedded in the gaps. When flowing through the heating section of the equipment, the thermal conductivity barrier effect of the solid high-melting-point particles can control the surface temperature fluctuation of the low-melting-point particles within a certain range, avoiding local overheating and melting. At the same time, the turbulence effect generated by the density difference between the two types of particles can maintain a high level of particle dispersion, eliminating the conditions for arch bridging from the material properties level. By cleverly utilizing the melting point difference to reduce the adhesion of low-melting-point particles, the continuous dispersion of particles is ensured, fundamentally avoiding particle bridging problems, guaranteeing a smooth production process, and effectively improving production efficiency and product quality stability.
[0020] 2. Install a material distribution cone in the distribution bin, positioning it on the particle falling trajectory and colliding with the particles. This further disperses the particles, breaks up any potential aggregation, enhances the dispersion effect, provides more uniform and dispersed material for the subsequent particle intake process, and improves the overall anti-blocking performance of the device.
[0021] 3. The material cone is located below the vertically arranged heating tube and is coaxially arranged, which ensures the accuracy and stability of the particle falling path. This allows the particles to stably collide with the material cone and disperse during the falling process, optimizing the consistency of particle dispersion and helping to maintain the stability and reliability of the device operation.
[0022] 4. The bottom diameter of the material dispersing cone is larger than the inner diameter of the heating tube, which expands the space range for particle collision and dispersion, increases the contact area and collision opportunities between particles and the material dispersing cone, and enables particles to be more fully dispersed, effectively preventing particles from accumulating and clogging in the distribution bin, and improving the anti-blocking effect.
[0023] 5. Support columns are installed on the bottom surface of the material distribution cone and fixed in the distribution bin, which enhances the structural stability of the material distribution cone. This allows it to maintain a reliable working state even under long-term impact from particle collisions, ensuring that the material distribution cone continues to effectively disperse particles and extending the service life of the device.
[0024] 6. The support column and the bulk cone are arranged coaxially, which further ensures the symmetry and stability of the bulk cone structure, so that the bulk cone is subjected to uniform force during operation, avoiding structural damage or performance degradation caused by uneven force, and ensuring the stability of particle dispersion effect.
[0025] 7. The material distribution bin is cylindrical and coaxially arranged with the material dispersing cone. This structural design makes the internal space layout of the material distribution bin more reasonable, which is conducive to the uniform dispersion and flow of particles in the material distribution bin. At the same time, it is easy to connect and install with other components, improving the overall coordination and working efficiency of the device.
[0026] 8. Multiple discharge ports are opened on the wall of the distribution bin, and the suction pipe is connected to the distribution bin through the discharge ports. This design increases the flexibility and uniformity of suction, enabling the particle suction equipment to more efficiently suck up particles in the distribution bin, avoid local particle accumulation, and further improve the device's anti-blocking and conveying capabilities.
[0027] 9. Install a guide plate that can collide with the particles on the inner wall of the feed pipe. During the falling process, the guide plate can change the movement trajectory of the particles, causing them to collide and disperse with each other. This allows for preliminary dispersion of the material before it enters the heating pipe, laying a good foundation for subsequent mixing and anti-blocking work and improving the overall mixing and dispersion efficiency of the device.
[0028] 10. Each guide plate is arranged evenly along a spiral line coaxial with the feed pipe, making the movement of particles in the feed pipe more orderly and varied, increasing the probability of collision and dispersion effect between particles. At the same time, the spiral arrangement helps guide the particles to fall smoothly, avoiding the accumulation or blockage of particles in the feed pipe, optimizing the feeding process and improving the smoothness of the device operation. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0030] In the diagram: 10, feed pipe; 11, branch pipe; 12, guide plate; 20, particle feeding device; 30, heating pipe; 40, distribution bin; 41, dispersing cone; 50, particle suction device; 51, suction pipe. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Please see Figure 1 The heating particle mixing prevention device of this utility model mainly consists of the following parts:
[0033] I. Feeding System
[0034] The feed pipe 10 is made of 304 stainless steel seamless pipe with a diameter of 100mm and the inner wall is mirror polished.
[0035] The top of the feed pipe 10 is connected to three types of particle feeding devices 20 (such as main material bin, low temperature particle bin, and additive bin) through multiple branch pipes 11. The inner diameter of the branch pipes 11 is 50mm, and they are welded to the feed pipe 10 at a 45° angle.
[0036] Eight guide plates 12 are evenly arranged along the spiral line on the inner wall of the feed pipe 10. The guide plates 12 are made of stainless steel plate with a thickness of 3mm and the edges are processed into a serrated shape (tooth height 2mm, tooth pitch 5mm). The pitch is 80mm and the spiral helix angle is 30°.
[0037] II. Heating System
[0038] The heating element 30 adopts a double-layer structure. The inner layer is a high-temperature resistant polytetrafluoroethylene (PTFE) sleeve (inner diameter 80mm), and the outer layer is wrapped with an electric heating wire (power 3kW) and covered with a 50mm thick aluminum silicate insulation layer.
[0039] The bottom of the heating tube 30 is connected to the material distribution bin 40 via a flange, and the flange sealing surface uses a graphite gasket.
[0040] III. Material Distribution System
[0041] The material distribution bin 40 is a cylindrical stainless steel cavity (200mm in diameter and 300mm in height), with four discharge ports evenly distributed along the circumference of the bin wall, each with an inner diameter of 60mm.
[0042] The bulk material cone 41 is made of cast aluminum with an anodized surface. It has a bottom diameter of 100mm and a cone angle of 75°. It is fixed to the bottom center of the distribution bin 40 by a hollow stainless steel support column with a diameter of 20mm.
[0043] The material distribution bin 40 is connected to four suction pipes 51 through the discharge port. The suction pipes 51 have an inner diameter of 50mm and are connected by quick-release clamps.
[0044] IV. Work Process and Parameter Control
[0045] 1. Raw material preparation stage:
[0046] The main material (such as polypropylene, melting point 165℃), low-temperature particles (such as EVA, melting point 85℃), and additives (such as slip agents) are delivered to branch pipe 11 by an automatic metering system at a mass ratio of 8:1:0.2.
[0047] Each branch pipe 11 is equipped with a pneumatic ball valve, and precise feeding is achieved through a PLC control system (Siemens S7-1200). The feeding speeds are 20kg / h, 2.5kg / h, and 0.5kg / h, respectively.
[0048] 2. Mixing and heating stage:
[0049] When the three types of particles fall into the feed pipe 10, they collide with the spiral guide plate 12 to form a rotating flow field. The mixing time is about 0.5s and the mixing uniformity reaches 98%.
[0050] The temperature of heating element 30 is set to 100℃ by a PID controller (below the melting point of the main material but above the softening point of the low-temperature particles), so that the surface of the low-temperature particles melts slightly, while the main material remains solid.
[0051] 3. Dispersion and Transportation Stage:
[0052] The mixed particles impact the material cone 41 at a speed of approximately 2.5 m / s. Agglomerated clumps with a particle size ≥ 2 mm are broken up, and the particles are scattered at a 45° angle along the cone surface to the periphery of the distribution bin 40.
[0053] The suction pipe 51 draws particles into the particle suction device 50 via a Roots vacuum pump (flow rate 10 m3 / min, negative pressure -0.08 MPa).
[0054] Through the above structural design and parameter control, this utility model effectively solves the particle bridging problem in the production of low-temperature, high-barrier products, and achieves a dual improvement in continuous and stable production and product quality.
[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A device for preventing mixing of heated particles, characterized in that, It includes a feed pipe (10) that is connected to a particle feeding device (20) with different melting points via multiple branch pipes (11), a heating pipe (30) is connected to the bottom of the feed pipe (10), a distribution bin (40) is connected to the bottom of the heating pipe (30), and the distribution bin (40) is connected to the suction pipe (51) of the particle suction device (50).
2. The heating particle mixing prevention device according to claim 1, characterized in that, The material distribution bin (40) is equipped with a material distribution cone (41), which is located on the falling trajectory of the particles and collides with the particles.
3. The heating particle mixing prevention device according to claim 2, characterized in that, The bulk cone (41) is located below the vertically arranged heating tube (30) and is coaxial with the heating tube (30).
4. The heating particle mixing prevention device according to claim 3, characterized in that, The bottom diameter of the bulk cone (41) is larger than the inner diameter of the heating tube (30).
5. The heating particle mixing prevention device according to claim 4, characterized in that, A support column is installed on the bottom surface of the bulk material cone (41), and the support column is fixedly installed in the distribution bin (40).
6. The heating particle mixing prevention device according to claim 5, characterized in that, The support column and the bulk cone (41) are arranged coaxially.
7. The heating particle mixing prevention device according to claim 6, characterized in that, The material distribution bin (40) is cylindrical and is arranged coaxially with the material distribution cone (41).
8. The heating particle mixing prevention device according to claim 7, characterized in that, The material distribution bin (40) has multiple discharge ports on its wall, and the suction pipe (51) is connected to the material distribution bin (40) through the discharge ports.
9. A heating particle mixing prevention device according to any one of claims 1-8, characterized in that, Multiple guide plates (12) are installed on the inner wall of the feed pipe (10) to collide with the particles during the falling process.
10. A heating particle mixing prevention device according to claim 9, characterized in that, Each guide plate (12) is arranged evenly along a spiral line coaxial with the feed pipe (10).