Underwater pelletizing channel pressure equalization guide plate

Abstract

This utility model discloses an underwater pelletizing channel pressure equalization guide plate, comprising: a guide channel, a porous flow divider plate, and a smooth transition plate. A sealing plate is fixedly connected to the inner side of the porous flow divider plate, and a plurality of flow divider blocks are provided on the sealing plate. Each flow divider block has honeycomb holes and is distributed with high density around the perimeter and low density in the center. This structure significantly improves pelletizing quality and production qualification rate. The guide channel can guide the orderly flow of materials, initially achieving balanced flow distribution. The porous flow divider plate, in conjunction with the inner sealing plate and flow divider blocks, precisely adjusts the material flow rate and pressure distribution by distributing the flow divider blocks with high density around the perimeter and low density in the center of the sealing plate, effectively avoiding particle size deviation caused by the difference in flow rate between the center and edge of the channel.

Description

Technical Field

[0001] This utility model relates to the field of pressure equalization guide plate technology, and in particular to a pressure equalization guide plate for an underwater pelletizing channel. Background Technology

[0002] In the booming development of the modern plastics processing industry, paint-free ABS / PC high-gloss particles occupy an important position in high-end manufacturing due to their superior properties. They achieve a unique high-gloss texture and vibrant colors without the need for subsequent painting processes, satisfying consumers' high demands for product appearance while reducing volatile organic compound (VOC) emissions during painting, aligning with current green and environmentally friendly development concepts. Therefore, paint-free ABS / PC high-gloss particles are increasingly widely used in fields such as home appliance casings and automotive interior parts, becoming a key material for enhancing product added value.

[0003] However, in the core production process of underwater pelletizing, numerous problems urgently need to be addressed. Uneven distribution of flow velocity and pressure within the material flow channel acts like a Damocles' sword, severely hindering product quality improvement. Traditional pelletizing equipment suffers from inherent design flaws in its flow channel structure, resulting in significant differences in material velocity between the center and edges of the channel. When material flows through the channel, the central area experiences less resistance and a faster flow velocity; while near the channel wall, the velocity is significantly reduced due to friction. This uneven velocity leads to inconsistent stress states on the material as it enters the pelletizing area, ultimately resulting in large deviations in the size of the cut pellets and a large number of defective products.

[0004] The impact of these dimensional deviations should not be underestimated. From an aesthetic perspective, they lead to differences in surface gloss and texture, severely affecting the overall appearance and consistency of the product. From a performance standpoint, dimensional deviations alter the internal stress distribution of the product, reducing its mechanical properties and making it more prone to deformation and cracking during use. In the assembly process, parts made from granules of varying sizes are difficult to assemble precisely, impacting overall product quality and user experience. The flow of materials within complex channels is influenced by multiple factors, and simple structural optimization is insufficient to overcome existing challenges, resulting in persistently low production yields. This not only significantly increases production costs but also causes severe resource waste, becoming a pressing technical problem that the plastics processing industry needs to solve. Utility Model Content

[0005] The purpose of this invention is to solve at least one of the technical problems existing in the prior art by providing an underwater pelletizing flow channel pressure equalization guide plate, which solves the problem of particle size deviation of high-gloss particles without spraying, and at the same time solves the problem of uneven material flow.

[0006] This utility model also provides an underwater pelletizing flow channel pressure equalization guide plate, including: a flow guide groove, a porous flow divider plate, and a smooth transition plate. A sealing plate is fixedly connected to the inner side of the porous flow divider plate. A plurality of flow divider blocks are provided on the sealing plate. The flow divider blocks are provided with honeycomb holes. The flow divider blocks are distributed on the sealing plate with high density around the perimeter and low density in the middle. A through groove is provided on the sealing plate. A pressure equalization pipe is provided in the through groove. A limit ring is fixedly connected to one end of the pressure equalization pipe. A fixing sleeve is threaded to the end of the pressure equalization pipe away from the limit ring. Through the above structure, the pelletizing quality and production qualification rate are significantly improved. The flow guide channel can guide the orderly flow of materials and initially achieve a balanced distribution of flow rate. The porous flow divider plate, together with the inner sealing plate and flow divider block, precisely adjusts the material flow rate and pressure distribution by the distribution of the flow divider block with high density around the perimeter and low density in the middle of the sealing plate. This effectively avoids particle size deviation caused by the difference in flow rate between the center and the edge of the flow channel. By embedding multiple micro channels in the sealing plate, the fluid pressure can be effectively dispersed to avoid uneven material flow caused by excessive local pressure.

[0007] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, both the flow divider block and the honeycomb hole are regular hexagonal, and the diameter of the honeycomb hole is gradually reduced. Through the above structure, the melt flow rate is forced to be uniform through geometric constraints.

[0008] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, the guide groove is arc-shaped. Through the above structure, the melt is guided to enter the grid plate smoothly, avoiding impact turbulence.

[0009] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, the flow divider block is inclined and forms a 30-degree inclination angle with the axis of the porous flow divider plate. Through the above structure, the residence time of the melt is extended through the inclined channel, which promotes pressure equalization.

[0010] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, the sealing plate and the flow divider are made of wear-resistant and corrosion-resistant materials. Through the above structure, the flow divider accuracy is avoided due to channel wear after long-term use.

[0011] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, a guide ring is fixedly connected to the fixed sleeve. The guide ring is conical. Through the above structure, it is convenient to guide the fluid and reduce resistance.

[0012] According to the underwater pelletizing channel pressure equalization guide plate of this utility model, the diameter of the limiting ring is larger than the diameter of the pressure equalization pipe. Through the above structure, it is easy to prevent the pressure equalization pipe from falling off.

[0013] Beneficial effects:

[0014] 1. The underwater pelletizing channel pressure equalization guide plate in this technical solution significantly improves pelletizing quality and production qualification rate through the synergistic effect of structures such as guide channels, porous flow dividers, and smooth transition plates. The guide channels guide the orderly flow of materials, initially achieving balanced flow distribution. The porous flow dividers, in conjunction with the inner sealing plate and flow dividers, precisely regulate material flow velocity and pressure distribution through the distribution pattern of high density around the perimeter and low density in the center of the sealing plate. This effectively avoids particle size deviation caused by the difference in flow velocity between the center and edge of the channel. Through the through channels, pressure equalization pipes, limiting rings, and fixing sleeves, fluid pressure is effectively dispersed, preventing uneven material flow caused by excessive local pressure.

[0015] 2. The underwater pelletizing channel pressure equalization guide plate in this technical solution further refines the material flow path through the honeycomb holes in the flow divider, allowing the material to enter the subsequent pelletizing process in a more uniform state. The smooth transition plate reduces the resistance and turbulence of material flow, ensuring stable material transport. The combined effect of these multiple structures makes the pressure and velocity distribution of the material in the channel more uniform, significantly reducing the dispersion of particle size, raising the product qualification rate to a new level, effectively reducing defects and rework caused by size deviations, and significantly improving production efficiency and economic benefits. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is an overall structural diagram of the pressure equalization guide plate of the underwater pelletizing channel of this utility model;

[0018] Figure 2 This is a cross-sectional view of the pressure equalization guide plate of the underwater pelletizing channel of this utility model;

[0019] Figure 3 This is a structural diagram of the flow divider block of the pressure equalization guide plate in the underwater pelletizing channel of this utility model;

[0020] Figure 4 This is a structural diagram of the porous flow divider plate of the underwater pelletizing channel pressure equalization guide plate of this utility model;

[0021] Figure 5 This is a rear view of the porous flow divider plate of the underwater pelletizing channel pressure equalization guide plate of this utility model.

[0022] Legend:

[0023] 1. Flow guide groove; 2. Porous flow divider plate; 3. Smooth transition plate; 4. Sealing plate; 5. Flow divider block; 6. Honeycomb hole; 7. Pressure equalization pipe; 8. Flow guide ring; 9. Fixing sleeve; 10. Through groove; 11. Limiting ring. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1-5 This utility model embodiment of an underwater pelletizing channel pressure equalization guide plate includes: a guide groove 1, a porous flow divider 2, and a smooth transition plate 3. The guide groove 1 is arc-shaped. A sealing plate 4 is fixedly connected to the inner side of the porous flow divider 2. A plurality of flow divider blocks 5 are provided on the sealing plate 4. The sealing plate 4 and the flow divider blocks 5 are made of wear-resistant and corrosion-resistant materials, such as YG8 hard alloy. The flow divider blocks 5 are provided with honeycomb holes 6. The flow divider blocks 5 are distributed on the sealing plate 4 with high density around the perimeter and low density in the middle. Both the flow divider blocks 5 and the honeycomb holes 6 are in the shape of a regular hexagon. The honeycomb 6 has a gradually decreasing diameter and is polygonal. The diverter block 5 is inclined and forms a 30-degree angle with the axis of the porous diverter plate 2. The sealing plate 4 has a through groove 10, and a pressure equalization pipe 7 is installed in the through groove 10. One end of the pressure equalization pipe 7 is fixedly connected to a limit ring 11, and the other end of the pressure equalization pipe 7 away from the limit ring 11 is threadedly connected to a fixing sleeve 9. A guide ring 8 is fixedly connected to the fixing sleeve 9. The guide ring 8 is conical, and the diameter of the limit ring 11 is larger than the diameter of the pressure equalization pipe 7.

[0026] Specifically, the arc-shaped guide channel 1 adopts an arc-shaped streamlined design. When the melt enters the porous flow divider plate 2 under the guidance of the arc-shaped guide channel 1, the hexagonal honeycomb holes 6 are arranged in a gapless layout. This tight and regular arrangement can accurately and evenly divide the incoming melt, making the shear force distribution on the hole wall more uniform during the flow division process, avoiding the adverse effects of excessive local shear force on the melt properties. At the same time, the porous flow divider plate 2 adopts a stepped porous structure, which, together with the closed flow divider cavity formed by the inner sealing plate 4, can effectively control the flow path of the melt and ensure the stability and controllability of the flow division process.

[0027] The flow divider 5 is a regular hexagonal column, and is distributed radially along the sealing plate 4 in a "dense around the edges and sparse in the middle" manner, which greatly improves the uniformity of the melt flow rate.

[0028] The honeycomb holes 6 adopt a gradient aperture design, and the axis of the channel is inclined at a 30° angle to the axis of the grid plate 2. When the melt flows out of the honeycomb holes 6, it will pass through the smooth transition plate 3. The function of the smooth transition plate 3 is to eliminate the flow velocity pulsation at the channel outlet. Its extremely low surface roughness can reduce the frictional resistance between the melt and the surface of the transition plate, ensuring the smoothness of the melt flow.

[0029] The through groove 10 facilitates the insertion of the pressure equalization pipe 7, the limiting ring 11 limits the pressure equalization pipe 7 and facilitates its fixation, the threaded connection between the fixing sleeve 9 and the pressure equalization pipe 7 facilitates its fixation, the guide ring 8 facilitates the guidance of fluid, and the conical design facilitates the reduction of resistance, the diameter of the limiting ring 11 is larger than the diameter of the pressure equalization pipe 7, which facilitates the prevention of the pressure equalization pipe 7 from falling off the sealing plate 4.

[0030] Working Principle: The pressure equalization guide plate in the underwater pelletizing channel achieves uniform flow and pressure balance of the melt through the coordinated work of its components. During operation, the high-temperature and high-pressure melt first enters the arc-shaped guide channel 1. Its arc-shaped structure utilizes the principles of fluid dynamics to guide the melt with a smooth curved surface, allowing the melt to flow smoothly into the channel at a small incident angle. This effectively avoids turbulence and pressure fluctuations caused by right-angle impacts, laying the foundation for the subsequent pressure equalization process.

[0031] Subsequently, the melt enters the porous flow divider plate 2, where the inner sealing plate 4 and flow divider blocks 5 form a crucial flow divider structure. The sealing plate 4 and flow divider blocks 5 are made of YG8 hard alloy, which, thanks to its excellent wear resistance and corrosion resistance, maintains structural stability even under prolonged contact with high-temperature melt, ensuring effective flow divider operation. The flow divider blocks 5 are distributed on the sealing plate 4 in a "dense around the edges and sparse in the center" pattern. This layout regulates the melt flow rate, making the flow velocity in the edge and center regions more consistent. The hexagonal honeycomb holes 6 within the flow divider blocks 5 have gradually decreasing diameters, and the channels are inclined at a 30° angle to the axis of the grid plate. As the melt passes through, the changes in hole diameter and the inclination angle work together to force the melt flow velocity to become uniform and prolong its residence time, promoting pressure equalization.

[0032] Finally, after the melt flows out through the honeycomb holes 6, it reaches the smooth transition plate 3. The plate eliminates the flow velocity pulsation at the outlet of the channel with its low-roughness surface. The chamfered connection design with the outlet end of the diversion grid further eliminates the velocity gradient of the fluid outlet, ultimately allowing the melt to flow out in a uniform and stable state, providing good conditions for the subsequent underwater pelletizing process and ensuring the dimensional accuracy and quality stability of the pellets.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An underwater pelletizing flow channel pressure equalization guide plate, characterized in that, include: The system comprises a flow guide (1), a porous flow divider (2), and a smooth transition plate (3). A sealing plate (4) is fixedly connected to the inner side of the porous flow divider (2). Several flow divider blocks (5) are provided on the sealing plate (4). The flow divider blocks (5) are provided with honeycomb holes (6). The flow divider blocks (5) are distributed on the sealing plate (4) with high density around the perimeter and low density in the middle. A through groove (10) is provided on the sealing plate (4). A pressure equalization pipe (7) is provided in the through groove (10). A limit ring (11) is fixedly connected to one end of the pressure equalization pipe (7). A fixing sleeve (9) is threaded to the end of the pressure equalization pipe (7) away from the limit ring (11).

2. The underwater pelletizing flow channel pressure equalization guide plate according to claim 1, characterized in that, Both the diverter block (5) and the honeycomb hole (6) are regular hexagonal, and the diameter of the honeycomb hole (6) gradually decreases.

3. The underwater pelletizing flow channel pressure equalization guide plate according to claim 1, characterized in that, The guide groove (1) is arc-shaped.

4. The underwater pelletizing flow channel pressure equalization guide plate according to claim 1, characterized in that, The diversion block (5) is inclined and has a 30-degree inclination angle with the axis of the porous diversion grid plate (2).

5. The underwater pelletizing flow channel pressure equalization guide plate according to claim 1, characterized in that, The sealing plate (4) and the diverter block (5) are made of wear-resistant and corrosion-resistant materials.

6. The underwater pelletizing flow channel pressure equalization guide plate according to claim 1, characterized in that, A flow guide ring (8) is fixedly connected to the fixed sleeve (9), and the flow guide ring (8) is conical.

7. The underwater pelletizing channel pressure equalization guide plate according to claim 1, characterized in that, The diameter of the limiting ring (11) is larger than the diameter of the pressure equalization pipe (7).

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