A hopper for an EPP particle pre-press system

Abstract

The utility model relates to a material tank technical field, concretely relates to a material tank for EPP particle pre -pressing system, including pre -pressing jar, install in pre -pressing jar for pressure -relief pressure -relief pipe, install in pressure -relief pipe for buffer multistage pressure -reducing mechanism, multistage pressure -reducing mechanism includes: primary buffer pipe, secondary buffer pipe, valve a, connecting pipe, primary buffer jar, secondary buffer jar and dispersion subassembly, primary buffer pipe detachable installation is in the export end of pressure -relief pipe, secondary buffer pipe is horizontally arranged in one side of primary buffer pipe, through multistage ladder formula pressure -reducing mechanism has optimized the stability of EPP particle pre -pressing system significantly: adjustable spring piston of primary buffer pipe and hydraulic damper of secondary buffer pipe form rigid and soft collaborative impact absorption, effectively suppresses pressure peak value, the standardization spiral flow guide structure of double buffer jar greatly prolongs airflow path, realizes two -stage centrifugal sedimentation separation in combination with conical discharge port, significantly reduces the risk of pipeline blockage.

Description

Technical Field

[0001] This utility model relates to the field of material tank technology, specifically a material tank for an EPP particle pre-compression system. Background Technology

[0002] EPP particle pre-compression tank is a specialized device that uses compressed air to force-permeate EPP beads in a closed, high-pressure environment. Its core purpose is to increase the internal pressure of the particles, improve their fluidity and permeability through the "pre-compression" process, thereby ensuring that the particles can fully and uniformly expand and fuse during subsequent steam molding, ultimately producing high-quality EPP foam products with uniform structure, high strength, stable dimensions, and smooth surface.

[0003] EPP particle pre-compression tanks are a key pre-treatment device on EPP (expanded polypropylene) molding and processing production lines, but they still have certain problems: 1) Insufficient particle settling leads to deep pipe blockage and frequent maintenance; 2) Low pressure relief efficiency, intermittent pressure relief mode causes pressure accumulation, explosions, and production interruption risks; 3) High-pressure gas backflow causes system contamination and abnormal equipment wear. Therefore, in view of the above situation, there is an urgent need to develop a material tank for EPP particle pre-compression systems to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide a material tank for an EPP particle pre-compression system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a material tank for an EPP particle pre-compression system, comprising a pre-compression tank, a pressure relief pipe installed on the pre-compression tank for pressure relief, and a multi-stage pressure reduction mechanism installed on the pressure relief pipe for buffering;

[0006] The multi-stage pressure reduction mechanism includes: a primary buffer pipe, a secondary buffer pipe, valve a, a connecting pipe, a primary buffer tank, a secondary buffer tank, and a dispersion component. The primary buffer pipe is detachably installed at the outlet end of the pressure relief pipe. The secondary buffer pipe is horizontally positioned on one side of the primary buffer pipe and is connected to and fixed to the middle end of the primary buffer pipe. Valve a is installed at the inlet end of the secondary buffer pipe. The connecting pipe is vertically positioned at the bottom of the exhaust end of the secondary buffer pipe and is connected to and fixed to the secondary buffer pipe. The primary buffer tank is installed at the bottom end of the connecting pipe. The secondary buffer tank is located on one side of the primary buffer tank. A connecting pipe is installed between the secondary buffer tank and the primary buffer tank for connection. Valve b is installed in the middle section of the connecting pipe. The dispersion component is installed at the exhaust end of the secondary buffer tank.

[0007] In practical use, a multi-stage pressure reduction mechanism achieves step-by-step buffering: the adjustable spring structure of the primary buffer tube and the hydraulic damper of the secondary buffer tube work together to absorb the impact; the inner spiral guide plates of the primary and secondary buffer tanks extend the airflow path to promote impurity sedimentation, and the conical inspection port facilitates cleaning; the Tesla valve flow channel of the dispersion component achieves unidirectional flow guidance and deceleration without moving parts; the alternating opening and closing strategy of valves a, b, and c allows the airflow to switch between buffer tanks for discharge, ultimately achieving a step-by-step attenuation of pressure fluctuations, effectively suppressing system vibration, reducing the risk of pipeline blockage, and ensuring continuous and stable exhaust, significantly improving the reliability and lifespan of the EPP particle pre-compression system.

[0008] Preferably, the primary buffer tube includes a limiting retaining ring, a buffer pad, a sliding shaft, an adjusting retaining ring, a spring, and an end seal. The limiting retaining ring is fixed to the inner wall of the primary buffer tube near the air inlet. The primary buffer tube has an internal thread. The adjusting retaining ring is threaded inside the primary buffer tube. The sliding shaft can slide through the axis of the adjusting retaining ring. The buffer pad is fixed to one end of the sliding shaft near the air inlet. The spring is sleeved on one end of the sliding shaft near the buffer pad. The exhaust end of the primary buffer tube is threaded with an end seal.

[0009] In practical use, the adjustable buffer structure of the primary buffer tube constrains the impact stroke through the limiting retaining ring, and the compression stroke of the spring is dynamically controlled by the threaded adjusting retaining ring. This allows the sliding shaft to drive the buffer pad to form an adaptive piston movement under the impact of airflow. Combined with the sealing design of the end seal, it achieves precise buffering and energy dissipation of sudden high-pressure gas in the pre-pressurization tank, significantly reducing system vibration and extending equipment life.

[0010] Preferably, a hydraulic buffer is installed at the end of the secondary buffer tube, and a piston is slidably installed inside the secondary buffer tube, with the piston fixedly connected to the output shaft of the hydraulic buffer.

[0011] In practical use, the secondary buffer tube forms a sealed buffer cavity through the rigid linkage between the piston and the hydraulic buffer. When the high-pressure airflow impacts the piston, it triggers the viscous damping effect of the hydraulic buffer, converting the gas kinetic energy into heat energy dissipation, achieving secondary precise attenuation of the pulsed high-pressure airflow, effectively suppressing the peak pressure fluctuation and reducing the risk of structural fatigue of the equipment.

[0012] Preferably, a retainer is fixed inside the primary buffer tank, an inner spiral guide plate is installed on the retainer, and a conical inspection port is fixed at the bottom of the primary buffer tank.

[0013] In practical use, the primary buffer tank fixes the inner spiral guide plate with a retainer, forcing the airflow to rotate downward along the spiral trajectory, significantly prolonging the residence time and enhancing the centrifugal sedimentation effect. This causes EPP particulate impurities entrained in the gas to be thrown against the tank wall and then slide down and accumulate along the inclined surface of the conical inspection port, achieving efficient gas-solid separation. At the same time, the spiral flow channel promotes the release of pressure energy gradient, forming a synergistic buffer with the multi-stage pressure reduction mechanism, greatly reducing exhaust pulsation and reducing the risk of pipeline blockage.

[0014] Preferably, the secondary buffer tank is equipped with a retainer, an inner spiral guide plate, and a conical inspection port that are consistent with the structure of the primary buffer tube.

[0015] Preferably, the dispersion component includes valves c and dispersion tubes, with several valves c installed at the exhaust port of the secondary buffer tank, and several dispersion tubes installed at the outlet end of valves c, and Tesla valve flow channels opened inside the dispersion tubes.

[0016] In practical use, it should be noted that the outlet end of valve c is connected to the reverse blocking end of the Tesla valve flow channel to achieve a pressure reduction effect. The dispersion component achieves redundant exhaust through the parallel design of multiple sets of valves c and dispersion pipes. The special flow channel structure of the Tesla valve flow channel further consumes the residual kinetic energy of the gas through the collision reflection mechanism, and works with the multi-stage pressure reduction mechanism to achieve the ultimate step-like attenuation of pressure energy, ultimately achieving a stable emission effect with low noise, backflow prevention and anti-clogging.

[0017] Preferably, the air inlet ends of the secondary buffer tube and the primary buffer tube form a 135-degree angle.

[0018] Compared with the prior art, this utility model provides a material tank for an EPP particle pre-compression system, which has the following advantages:

[0019] The stability of the EPP particle pre-compression system is significantly optimized through a multi-stage stepped pressure reduction mechanism: the adjustable spring piston of the primary buffer tube and the hydraulic damper of the secondary buffer tube form a rigid-flexible synergistic impact absorption, effectively suppressing pressure peaks; the standardized spiral flow guiding structure of the dual buffer tanks greatly extends the airflow path, and combined with the conical slag discharge port, it achieves two-stage centrifugal sedimentation separation, significantly reducing the risk of pipeline blockage; the parallel Tesla valve flow channel of the distributed components provides a non-backflow, low-noise emission channel, and the Tesla valve flow channel installed in reverse—the valve outlet is connected to the high-pressure blockage end, and the nonlinear flow resistance characteristics form an adaptive flow stabilization barrier in the low-pressure exhaust stage, which, together with the valve alternating opening and closing strategy, forms a continuous pressure release closed loop, ultimately achieving a comprehensive improvement in high-efficiency buffering, strong anti-blockage, and long equipment life. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0021] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the multi-stage pressure reduction mechanism of this utility model;

[0023] Figure 3 This is one of the partial cross-sectional views of the multi-stage pressure reduction mechanism of this utility model;

[0024] Figure 4 This is the second partial cross-sectional view of the multi-stage pressure reduction mechanism of this utility model;

[0025] Figure 5 This is a side longitudinal sectional view of the multi-stage pressure reduction mechanism of this utility model;

[0026] Figure 6 This is a partial cross-sectional view of the dispersion tube of this utility model.

[0027] In the diagram: 10, pre-pressure tank; 110, pressure relief pipe; 20, multi-stage pressure reduction mechanism; 210, primary buffer pipe; 211, limit retaining ring; 212, buffer pad; 213, sliding shaft; 214, adjusting retaining ring; 215, spring; 216, end seal; 220, secondary buffer pipe; 221, hydraulic buffer; 222, piston; 230, valve a; 240, connecting pipe; 250, primary buffer tank; 251, retainer; 252, inner spiral guide plate; 253, conical inspection port; 260, connecting pipe; 270, valve b; 280, secondary buffer tank; 290, dispersion assembly; 291, valve c; 292, dispersion pipe; 293, Tesla valve flow channel. Detailed Implementation

[0028] 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.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example:

[0031] Please see Figures 1-6 The present invention provides a technical solution: a material tank for an EPP particle pre-compression system, comprising a pre-compression tank 10, a pressure relief pipe 110 installed on the pre-compression tank 10 for pressure relief, and a multi-stage pressure reduction mechanism 20 installed on the pressure relief pipe 110 for buffering.

[0032] The multi-stage pressure reduction mechanism 20 includes: a primary buffer pipe 210, a secondary buffer pipe 220, a valve a 230, a connecting pipe 240, a primary buffer tank 250, a secondary buffer tank 280, and a dispersion component 290. The primary buffer pipe 210 is detachably installed at the outlet end of the pressure relief pipe 110. The secondary buffer pipe 220 is horizontally arranged on one side of the primary buffer pipe 210 and is connected to and fixed to the middle end of the primary buffer pipe 210. The valve a 230 is installed at the inlet end of the secondary buffer pipe 220. The connecting pipe 240 is vertically arranged at the bottom of the exhaust end of the secondary buffer pipe 220 and is connected to and fixed to the secondary buffer pipe 220. The primary buffer tank 250 is installed at the bottom end of the connecting pipe 240. The secondary buffer tank 280 is located on one side of the primary buffer tank 250. A connecting pipe 260 is installed between the secondary buffer tank 280 and the primary buffer tank 250 for communication. A valve b 270 is installed in the middle section of the connecting pipe 260. The dispersion component 290 is installed at the exhaust end of the secondary buffer tank 280.

[0033] In practical use, the multi-stage pressure reduction mechanism 20 achieves step-by-step buffering: the adjustable spring 215 structure of the primary buffer tube 210 and the hydraulic buffer 221 of the secondary buffer tube 220 work together to absorb the impact; the inner spiral guide plate 252 of the primary buffer tank 250 and the secondary buffer tank 280 extends the airflow path to promote impurity sedimentation, and the conical inspection port 253 facilitates cleaning; the Tesla valve flow channel 293 of the dispersion component 290 achieves unidirectional flow guidance and deceleration without moving parts; the alternating opening and closing strategy of valves a230, b270 and c290 allows the airflow to switch between buffer tanks for discharge, ultimately achieving step-by-step attenuation of pressure fluctuations, effectively suppressing system vibration, reducing the risk of pipeline blockage and ensuring continuous and stable exhaust, significantly improving the reliability and lifespan of the EPP particle pre-compression system.

[0034] Preferably, the primary buffer tube 210 includes a limiting retaining ring 211, a buffer pad 212, a sliding shaft 213, an adjusting retaining ring 214, a spring 215, and an end seal 216. The limiting retaining ring 211 is fixed to the inner wall of the primary buffer tube 210 near the air inlet. The primary buffer tube 210 has an internal thread. The adjusting retaining ring 214 is threadedly connected to the inside of the primary buffer tube 210. The sliding shaft 213 is slidably inserted through the axial position of the adjusting retaining ring 214. The buffer pad 212 is fixed to one end of the sliding shaft 213 near the air inlet. The spring 215 is sleeved on one end of the sliding shaft 213 near the buffer pad 212. The exhaust end of the primary buffer tube 210 is threadedly connected to the end seal 216.

[0035] In practical use, the adjustable buffer structure of the primary buffer tube 210 constrains the impact stroke through the limiting retaining ring 211, and the compression stroke of the spring 215 is dynamically controlled by the threaded adjusting retaining ring 214, so that the sliding shaft 213 drives the buffer pad 212 to form an adaptive piston movement under the impact of airflow. Combined with the sealing design of the end seal 216, it realizes precise buffering and energy step dissipation of the sudden high pressure gas in the pre-pressure tank 10, significantly reducing system vibration and extending equipment life.

[0036] Preferably, a hydraulic buffer 221 is installed at the end of the secondary buffer tube 220, and a piston 222 is slidably installed inside the secondary buffer tube 220. The piston 222 is fixedly connected to the output shaft of the hydraulic buffer 221.

[0037] In practical use, the secondary buffer tube 220 forms a closed buffer cavity through the rigid linkage between the piston 222 and the hydraulic buffer 221. When the high-pressure airflow impacts the piston 222, it triggers the viscous damping effect of the hydraulic buffer 221, converting the gas kinetic energy into heat energy dissipation, thereby achieving secondary precise attenuation of the pulsed high-pressure airflow, effectively suppressing the peak pressure fluctuation and reducing the risk of structural fatigue of the equipment.

[0038] Preferably, a retainer 251 is fixed inside the primary buffer tank 250, an inner spiral guide plate 252 is installed on the retainer 251, and a conical inspection port 253 is fixed at the bottom of the primary buffer tank 250.

[0039] In practical use, the primary buffer tank 250 fixes the inner spiral guide plate 252 through the retainer 251, forcing the airflow to rotate downward along the spiral trajectory, significantly prolonging the residence time and enhancing the centrifugal sedimentation effect. This causes the EPP particulate impurities entrained in the gas to be thrown against the tank wall and then slide down and accumulate along the inclined surface of the conical inspection port 253, achieving efficient gas-solid separation. At the same time, the spiral flow channel promotes the gradient release of pressure energy, forming a synergistic buffer with the multi-stage pressure reducing mechanism 20, greatly reducing exhaust pulsation and reducing the risk of pipeline blockage.

[0040] Preferably, the secondary buffer tank 280 is provided with a retainer 251, an inner spiral guide plate 252 and a conical inspection port 253 that are consistent with the structure of the primary buffer tube 210.

[0041] Preferably, the dispersion component 290 includes valves c291 and dispersion pipes 292. Several valves c291 are installed at the exhaust port of the secondary buffer tank 280, and several dispersion pipes 292 are installed at the outlet end of valves c291. A Tesla valve flow channel 293 is opened inside the dispersion pipe 292.

[0042] In practical use, it should be noted that the outlet end of valve c291 is connected to the reverse blocking end of Tesla valve flow channel 293 to achieve a pressure reduction effect. The dispersion component 290 achieves redundant exhaust through the parallel design of multiple sets of valves c291 and dispersion pipe 292. The special flow channel structure of Tesla valve flow channel 293 further consumes the residual kinetic energy of the gas through the collision reflection mechanism, and works with the multi-stage pressure reducing mechanism 20 to achieve the ultimate step-like attenuation of pressure energy, ultimately achieving a stable emission effect with low noise, backflow prevention and anti-clogging.

[0043] Preferably, the air inlet ends of the secondary buffer tube 220 and the primary buffer tube 210 form a 135-degree angle.

[0044] Working principle: The high-pressure gas in the pre-pressure tank 10 first enters the multi-stage pressure reduction mechanism 20 through the pressure relief pipe 110. In the primary buffer pipe 210, the airflow impacts the buffer pad 212, pushes the sliding shaft 213 to compress the spring 215, and the energy is initially dissipated through the flexible deformation of the spring. Subsequently, the airflow pushes the piston 222 through the secondary buffer pipe 220, triggering the viscous damping effect of the hydraulic buffer 221, converting the kinetic energy of the gas into heat energy, realizing rigid secondary attenuation. The buffered airflow enters the primary buffer tank 250 through the connecting pipe 240, and is forced to rotate by the inner spiral guide plate 252 to form a centrifugal flow field, causing EPP particles to settle along the tank wall to the conical inspection port 253. When valves a230 and c291 are opened, the airflow is temporarily stored in the primary buffer tank 250. The treated gas in the secondary buffer tank 280 is discharged through the dispersion pipe 292. At this time, the inlet of the Tesla valve flow channel 293, which is installed in reverse and connected to the high-pressure blocking end, utilizes its asymmetric flow resistance characteristics to form a unidirectional flow barrier during the low-pressure exhaust stage, further weakening the residual pressure pulsation. When valve b270 is opened and the other valves are closed, the gas in the primary buffer tank 250 enters the secondary buffer tank 280 through the connecting pipe 260. Under the same spiral flow guiding structure, it completes secondary centrifugal sedimentation. Through the alternating opening and closing of valve a230 / valve c291 and valve b270, the airflow circulates, stores, separates, and discharges between the two buffer tanks, forming a continuous stepped pressure reduction closed loop, ultimately achieving efficient particle separation, deep suppression of vibration and noise, and stable operation of the system with zero backflow.

[0045] 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.

Claims

1. A hopper for an EPP particle pre-press system, characterized by: It includes a pre-pressurization tank (10), a pressure relief pipe (110) installed on the pre-pressurization tank (10) for depressurization, and a multi-stage pressure reduction mechanism (20) installed on the pressure relief pipe (110) for buffering. The multi-stage pressure reduction mechanism (20) includes: a primary buffer pipe (210), a secondary buffer pipe (220), valve a (230), a connecting pipe (240), a primary buffer tank (250), a secondary buffer tank (280), and a dispersion component (290). The primary buffer pipe (210) is detachably installed at the outlet end of the pressure relief pipe (110). The secondary buffer pipe (220) is horizontally arranged on one side of the primary buffer pipe (210) and connected and fixed to the middle end of the primary buffer pipe (210). The valve a (230) is installed at the inlet end of the secondary buffer pipe (220). The connecting pipe (240) is vertically arranged at the bottom of the exhaust end of the secondary buffer pipe (220) and is connected to and fixed to the secondary buffer pipe (220). The primary buffer tank (250) is installed at the bottom end of the connecting pipe (240). The secondary buffer tank (280) is located on one side of the primary buffer tank (250). A connecting pipe (260) for communication is installed between the secondary buffer tank (280) and the primary buffer tank (250). A valve b (270) is installed in the middle section of the connecting pipe (260). The dispersion component (290) is installed at the exhaust end of the secondary buffer tank (280).

2. A canister for use in an EPP particle pre-press system according to claim 1, characterized in that: The primary buffer tube (210) includes a limiting retaining ring (211), a buffer pad (212), a sliding shaft (213), an adjusting retaining ring (214), a spring (215), and an end seal (216). The limiting retaining ring (211) is fixed on the inner wall of the primary buffer tube (210) near the air inlet. The primary buffer tube (210) has an internal thread. The adjusting retaining ring (214) is threaded inside the primary buffer tube (210). The sliding shaft (213) is slidably inserted through the axis of the adjusting retaining ring (214). The buffer pad (212) is fixed on one end of the sliding shaft (213) near the air inlet. The spring (215) is sleeved on one end of the sliding shaft (213) near the buffer pad (212). The exhaust end of the primary buffer tube (210) is threaded with an end seal (216).

3. A canister for use in an EPP particle pre-press system according to claim 1, characterized in that: A hydraulic buffer (221) is installed at the end of the secondary buffer tube (220), and a piston (222) is slidably installed inside the secondary buffer tube (220). The piston (222) is fixedly connected to the output shaft of the hydraulic buffer (221).

4. A canister for use in an EPP particle pre-press system according to claim 1, characterized in that: The primary buffer tank (250) is internally fixed with a retainer (251), and an inner spiral guide plate (252) is installed on the retainer (251). A conical inspection port (253) is fixed at the bottom of the primary buffer tank (250).

5. A canister for use in an EPP particle pre-press system according to claim 1, characterized in that: The secondary buffer tank (280) is equipped with a retainer (251), an inner spiral guide plate (252), and a conical inspection port (253) that are identical in structure to the primary buffer tube (210).

6. A material tank for an EPP particle pre-compression system according to claim 1, characterized in that: The dispersion component (290) includes valves c (291) and dispersion tubes (292). Several valves c (291) are installed at the exhaust port of the secondary buffer tank (280), and several dispersion tubes (292) are installed at the outlet end of valves c (291). A Tesla valve flow channel (293) is opened inside the dispersion tube (292).

7. A canister for use in an EPP particle pre-press system according to claim 1, characterized in that: The secondary buffer tube (220) and the air inlet end of the primary buffer tube (210) form a 135-degree angle.

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