Material drying device of engineering plastic processing equipment

Abstract

The utility model relates to the technical field of engineering plastic processing, in particular to a material drying device of engineering plastic processing equipment. According to the technical scheme, an upper cover is installed above a material frame, a base is installed at the bottom end of the material frame, a hollowed-out net is fixed to the bottom end of the material frame, a gasket is arranged at an opening in the upper end of the material frame, the hollowed-out net is supported in the material frame through the gasket, a check ring is arranged in the upper cover, and the check ring is connected with the base. The hollow net at the opening of the material frame is clamped and fixed between the upper cover and the material frame through a gasket and a check ring; a three-way valve is installed at the top end of the upper cover, a bent pipe is arranged at the bottom end of the base, and the three-way valve is communicated with the bent pipe through a three-way pipe. According to the utility model, the problem of drying dead angles caused by non-uniform heat distribution is reduced, and the drying uniformity and quality are improved. And under the condition that the same drying effect is achieved, the drying time can be shortened, energy consumption can be reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering plastic processing, in particular to a material drying device for engineering plastic processing equipment. Background Art

[0002] Engineering plastics are high-performance plastics commonly used in the manufacture of demanding industrial products such as mechanical parts, automotive components, electronic devices, and medical devices. Their key characteristics include high strength, hardness, heat resistance, chemical resistance, wear resistance, and electrical insulation. Different types of engineering plastics exhibit varying properties. For example, polycarbonate offers high strength, while polyimide offers high-temperature, high-pressure, and corrosion resistance. During the plastic pelletization process, the raw materials are fed into a hot melt machine. After the plastic strips are cooled in a water-filled cooling tank, they are then cut into pellets in a pelletizer. The plastic strips entering the pelletizer are naturally hydrated, and this excess moisture can severely impact the pelletizer's performance.

[0003] After searching, the patent with patent announcement number CN220162956U discloses a drying device for engineering plastic processing equipment. Although the device can turn over the internal accumulated raw materials by setting up the combination of the air outlet pipe and the adjustment plate when in use, thereby avoiding the problem of incomplete drying caused by the accumulation of internal raw materials, when designing the device, although the combination of the air outlet pipe and the adjustment plate was considered to turn over the internal accumulated raw materials, this mechanism did not cover the plastic particles in the connecting seat. This results in the plastic particles in the connecting seat being unable to be effectively turned over during the drying process, thereby forming a drying dead corner. Due to the inability to turn over, the plastic particles in the connecting seat may be in an environment with a low temperature or lack of hot air flow for a long time, resulting in the inability to fully evaporate the moisture therein, resulting in incomplete drying. This will not only affect the drying quality of the plastic particles, but may also have an adverse effect on the subsequent processing process. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a material drying device for engineering plastic processing equipment, which solves the problems raised in the background technology.

[0005] The utility model solves the above-mentioned technical problems as follows:

[0006] A material drying device for engineering plastic processing equipment comprises a material frame, an upper cover is installed above the material frame, and a base is installed at the bottom end of the material frame;

[0007] A hollow net is fixed to the bottom end of the material frame, a gasket is provided at the upper end opening of the material frame, the hollow net is placed in the material frame through the gasket, a retaining ring is provided inside the upper cover, and the hollow net at the opening of the material frame is clamped and fixed between the upper cover and the material frame by the gasket and the retaining ring;

[0008] A three-way valve is installed on the top of the upper cover, and a bend is provided at the bottom end of the base. The three-way valve and the bend are communicated through the three-way pipe.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the upper cover and the three-way pipe are connected to the three-way valve through a tapered guide pipe, and the end of the tapered guide pipe with a smaller diameter faces the three-way valve.

[0011] The beneficial effects of adopting the above further scheme are:

[0012] The tapered guide tube design allows the airflow to gradually decrease in diameter as it passes through. This, according to fluid dynamics principles (such as Bernoulli's principle), increases its velocity. This design enhances airflow dynamics within the drying unit, allowing hot air to flow more efficiently through the feed frame, thereby improving drying efficiency. The smaller end of the tapered guide tube faces the three-way valve, creating a stronger negative pressure effect at the valve. This negative pressure not only helps continuously extract air flowing from the base into the feed frame but also further promotes air circulation and renewal within the frame, ensuring more uniform drying of the plastic pellets. The high-speed and evenly distributed airflow ensures more uniform heat transfer within the feed frame. The plastic pellets are exposed to hot air from all directions on the perforated mesh, reducing drying dead spots caused by uneven heat distribution and improving drying uniformity and quality. Due to the increased airflow velocity and optimized heat distribution, the plastic pellets reach the desired dryness more quickly. This means that while achieving the same drying effect, this design can reduce drying time and energy consumption, lowering production costs.

[0013] Furthermore, a second flange is provided on the outer sides of the upper cover, the material frame and the base, and the upper cover, the material frame and the base are fixed by locking with the second flange and bolts.

[0014] The beneficial effects of adopting the above further scheme are:

[0015] The second flange acts as a connector, tightly connected to the upper cover, material frame, and base via bolts, forming a stable overall structure. This connection method can withstand high pressure and vibration, ensuring the stability and reliability of the drying device during long-term operation.

[0016] Furthermore, a first flange is provided on the three-way valve and the tapered guide tube, and the three-way valve, the upper cover and the tapered guide tube of the three-way tube are fastened and fixed by means of the first flange and bolts.

[0017] The beneficial effects of adopting the above further scheme are:

[0018] The first flange serves as a connector, tightly connecting the three-way valve to the upper cover and the tapered guide tube of the three-way pipe via bolts, forming a stable connection. This connection not only improves the stability of the entire drying device but also ensures a tight seal at the joint. This improved sealing is crucial for preventing high-temperature exhaust gas leakage and maintaining air circulation and temperature distribution within the device.

[0019] Furthermore, one end of the three-way pipe away from the three-way valve and the base is connected to the high-temperature exhaust gas through the valve.

[0020] The beneficial effects of adopting the above further scheme are:

[0021] By placing a valve between the tee and the high-temperature exhaust gas, the flow of high-temperature exhaust gas entering the drying unit can be precisely controlled. This flexibility allows operators to adjust the exhaust gas flow rate to achieve optimal drying results based on different drying needs and process requirements. As the heat source of the drying unit, fully utilizing the energy of high-temperature exhaust gas is crucial for reducing production costs and improving energy efficiency. By controlling the valve, only the appropriate amount of exhaust gas enters the unit, avoiding energy waste. Furthermore, when drying is not required, the valve can be closed to prevent exhaust gas from entering, further saving energy.

[0022] Furthermore, the high-temperature exhaust gas is diverted through the tee to the elbow and the tapered guide tube of the tee, and the high-temperature exhaust gas is compressed by the tapered guide tube when passing through the tapered guide tube, thereby increasing the flow rate of the high-temperature exhaust gas and generating negative pressure at the three-way valve connected to the tapered guide tube of the tee. The negative pressure continuously extracts the gas flowing from the base to the material frame, thereby increasing the flow rate of the gas flowing from the base to the material frame.

[0023] The beneficial effects of adopting the above further scheme are:

[0024] High-temperature exhaust air is compressed as it passes through the tapered guide tube, significantly increasing its flow rate. This design allows the hot air to flow more quickly through the feed frame, effectively exchanging heat with the plastic pellets and improving drying efficiency. The faster flow rate ensures more even heat transfer to the pellets, shortening drying time. The negative pressure created at the junction of the tapered guide tube and the three-way valve continuously extracts air flowing from the base into the feed frame and discharges it through the three-way valve. This air circulation mechanism helps maintain continuous and stable airflow within the feed frame, ensuring that all parts of the plastic pellets receive uniform hot air. This enhanced air circulation distributes the heat of the high-temperature exhaust air more evenly within the feed frame, reducing the number of dead spots in the drying process caused by uneven heat distribution. This improves drying uniformity and quality, ensuring consistent drying of the pellets. Due to this increased drying efficiency, this design completes the drying process in a shorter time, reducing energy consumption. Furthermore, by optimizing heat distribution and minimizing heat loss, energy efficiency is further enhanced.

[0025] The utility model provides a drying device for engineering plastic processing equipment.

[0026] Beneficial effects:

[0027] The design of the three-way valve, three-way pipe, elbow, and tapered guide pipe effectively diverts and accelerates high-temperature exhaust gas. The high-temperature exhaust gas is compressed as it passes through the tapered guide pipe, increasing its flow rate and creating negative pressure at the three-way valve. This negative pressure effect continuously extracts gas flowing from the base into the material frame, increasing its flow rate. This efficient air circulation ensures rapid and even temperature distribution within the material frame, preventing localized overheating or overcooling.

[0028] High-speed airflow dries the plastic pellets quickly, significantly improving drying efficiency. The plastic pellets are evenly exposed to hot air within the frame, quickly removing moisture from the surface and interior, ensuring the drying quality of the plastic pellets. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0030] In the attached figure:

[0031] Figure 1 This is a schematic diagram of the appearance of the utility model;

[0032] Figure 2 This is a schematic diagram of the cross-sectional structure of the upper cover of the present utility model;

[0033] Figure 3 This is a schematic diagram of the top view of the material frame of the present invention;

[0034] Figure 4 This is a schematic diagram of the appearance of the material frame of the present invention when viewed from above.

[0035] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0036] 1. Three-way valve; 101. First flange; 2. Upper cover; 201. Second flange; 202. Retaining ring; 3. Material frame; 301. Gasket; 302. Hollow mesh; 4. Base; 401. Elbow; 5. Tee; 501. Conical guide tube. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1 to 4 As shown, the embodiment provided by the utility model:

[0039] Example 1

[0040] A drying device for engineering plastics processing equipment includes a material frame 3, an upper cover 2 mounted above the material frame 3, a base 4 mounted at the bottom of the material frame 3, and a second flange 201 disposed on the outer sides of the upper cover 2, the material frame 3, and the base 4. The upper cover 2, the material frame 3, and the base 4 are secured together by the second flange 201 and bolts. The second flange 201, as an important connecting member, is tightly connected to the upper cover 2, the material frame 3, and the base 4 by means of bolts, thereby forming an extremely stable overall structure. This connection method has excellent pressure and vibration resistance, and can effectively ensure the stability and reliability of the drying device during long-term operation. A hollow mesh 302 is fixed to the bottom end of the material frame 3, a gasket 301 is disposed at the upper end opening of the material frame 3, and the hollow mesh 302 is supported within the material frame 3 by the gasket 301. A retaining ring 202 is disposed inside the upper cover 2, and the hollow mesh 302 at the opening of the material frame 3 is clamped and secured between the upper cover 2 and the material frame 3 by the gasket 301 and the retaining ring 202.

[0041] Example 2

[0042] In order to further ensure the drying efficiency of the plastic particles in the material frame 3, for example, Figures 1 to 4As shown, the present invention also includes: a three-way valve 1 is installed on the top of the upper cover 2, and a bend 401 is provided at the bottom end of the base 4. The three-way valve 1 and the bend 401 are connected through a three-way pipe 5. The end of the three-way pipe 5 away from the three-way valve 1 and the base 4 is connected to the high-temperature exhaust gas through a valve. By cleverly arranging a valve between the three-way pipe 5 and the high-temperature exhaust gas, it is possible to accurately control the flow rate of the high-temperature exhaust gas entering the drying device. This high degree of flexibility allows operators to flexibly adjust the flow rate of the exhaust gas according to different drying needs and process requirements, thereby achieving the most ideal drying effect. As an important heat source for the drying device, the full utilization of the energy of the high-temperature exhaust gas is of great importance for reducing production costs and improving energy utilization efficiency. Through precise control of the valve, it can be ensured that only an appropriate amount of exhaust gas enters the interior of the device, avoiding unnecessary waste of energy. At the same time, when drying is not required, the valve can be closed in time to effectively prevent waste gas from entering, further saving energy. The high-temperature waste gas is diverted through the three-way pipe 5 to the elbow 401 and the tapered guide pipe 501 of the three-way pipe 5. The high-temperature waste gas is compressed by the tapered guide pipe 501 as it passes through the tapered guide pipe 501, increasing the flow rate of the high-temperature waste gas and generating a negative pressure at the three-way valve 1 connected to the tapered guide pipe 501 of the three-way pipe 5. The negative pressure continuously extracts gas flowing from the base 4 to the material frame 3, increasing the flow rate of gas flowing from the base 4 to the material frame 3, thereby uniformly distributing the temperature within the material frame 3. At the same time, the high-speed airflow quickly dries the plastic particles. The high-temperature waste gas is compressed as it flows through the tapered guide pipe 501, significantly increasing its flow rate. This unique design allows hot air to flow through the material frame 3 at a faster rate, fully and efficiently exchanging heat with the plastic particles, thereby greatly improving drying efficiency. A faster flow rate not only helps to transfer heat to the plastic particles more evenly, but also effectively shortens the drying time. At the connection between the tapered guide tube 501 and the three-way valve 1, a negative pressure effect is generated. This effect allows the gas flowing from the base 4 into the material frame 3 to be continuously extracted and smoothly discharged through the three-way valve 1. This airflow circulation mechanism is of great significance for maintaining the continuity and stability of the airflow in the material frame 3, and can ensure that the plastic particles are evenly affected by hot air in all parts. By enhancing the airflow circulation, the heat of the high-temperature exhaust gas can be more evenly distributed in the material frame 3, significantly reducing the problem of drying dead corners caused by uneven heat distribution. This is crucial to improving the uniformity and quality of drying, and can ensure that the plastic particles reach a consistent degree of dryness. Due to the significant improvement in drying efficiency, the design can complete the drying task in a shorter time, thereby significantly reducing energy consumption.Furthermore, by optimizing heat distribution and reducing heat loss, energy efficiency is further improved. The upper cover 2 and three-way pipe 5 are connected to the three-way valve 1 via a tapered guide pipe 501, with the smaller end of the tapered guide pipe 501 facing the three-way valve 1. The unique design of the tapered guide pipe 501 causes the airflow to experience a gradual decrease in pipe diameter as it passes through. According to the principles of fluid mechanics (e.g., Bernoulli's principle), this change leads to a corresponding increase in airflow velocity. This design significantly enhances the airflow dynamics within the drying device, allowing hot air to flow more efficiently through the material frame 3, thereby significantly improving drying efficiency. The smaller end of the tapered guide pipe 501 faces the three-way valve 1, creating a stronger negative pressure effect at the three-way valve 1. This negative pressure not only continuously extracts the gas flowing from the base 4 into the material frame 3 but also further promotes the circulation and renewal of gas within the material frame 3, effectively ensuring more uniform drying of the plastic pellets. The high-speed and evenly distributed airflow ensures more uniform heat transfer within the material frame 3. The plastic particles are exposed to hot air from all directions on the hollow mesh 302, effectively reducing the problem of drying dead spots caused by uneven heat distribution and significantly improving drying uniformity and quality. Due to the increased airflow rate and optimized heat distribution, the plastic particles can reach the desired drying degree more quickly. This means that while achieving the same drying effect, this design can significantly reduce drying time and energy consumption, effectively reducing production costs. A first flange 101 is provided on the three-way valve 1 and the tapered guide tube 501. The three-way valve 1 is secured to the upper cover 2 and the tapered guide tube 501 of the three-way tube 5 via the first flange 101 and bolts. The first flange 101 also plays a key role as a connector, tightly connecting the three-way valve 1, the upper cover 2, and the tapered guide tube 501 of the three-way tube 5 together via bolts, forming a strong and reliable connection. This connection method not only significantly improves the stability of the entire drying device but also ensures a good sealing of the joints. Improved sealing is crucial for preventing high-temperature exhaust gas leakage, maintaining air circulation within the device, and maintaining uniform temperature distribution.

[0043] Working principle:

[0044] The device uses high-temperature exhaust gas generated during the production process as a heat source. These exhaust gases are introduced into the drying device through a specific piping system (such as the tee 5, the elbow 401, etc.). After the high-temperature exhaust gas enters the tee 5, it is diverted to the elbow 401 and the tapered guide tube 501 of the tee 5. In the tapered guide tube 501, the exhaust gas is compressed and the flow rate increases significantly. When the exhaust gas passes through the tapered guide tube 501, its diameter gradually decreases. According to Bernoulli's principle, the flow rate of the exhaust gas increases and the pressure decreases, generating a negative pressure at the three-way valve 1. The negative pressure effect causes the gas flowing from the base 4 to the material frame 3 to be continuously extracted and discharged through the three-way valve 1, thereby forming a continuous airflow cycle. The high-speed airflow is evenly distributed in the material frame 3, ensuring that all parts of the plastic particles can be fully affected by the hot air.

[0045] Plastic pellets are placed on the hollow mesh 302 within the material frame 3. Hot air passes through the mesh 302 and contacts the surface of the plastic pellets, exchanging heat. The plastic pellets absorb the heat from the hot air, and the moisture within them gradually evaporates, thus completing the drying process. As the hot air continues to act, the moisture in the plastic pellets gradually evaporates into water vapor. This water vapor is carried out of the material frame 3 by the circulating airflow and discharged outside the device through the three-way valve 1.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A material drying device for engineering plastic processing equipment, comprising a material frame (3), an upper cover (2) being installed above the material frame (3), and a base (4) being installed at the bottom end of the material frame (3), characterized in that: A hollow net (302) is fixed at the bottom end of the material frame (3), a gasket (301) is provided at the upper opening of the material frame (3), the hollow net (302) is placed in the material frame (3) through the gasket (301), a retaining ring (202) is provided inside the upper cover (2), and the hollow net (302) at the opening of the material frame (3) is clamped and fixed between the upper cover (2) and the material frame (3) through the gasket (301) and the retaining ring (202); A three-way valve (1) is installed at the top end of the upper cover (2), and a bend pipe (401) is provided at the bottom end of the base (4). The three-way valve (1) and the bend pipe (401) are connected via a three-way pipe (5).

2. The material drying device of engineering plastic processing equipment according to claim 1, characterized in that: The upper cover (2) and the three-way pipe (5) are connected to the three-way valve (1) via a tapered guide pipe (501), and the end of the tapered guide pipe (501) with a smaller diameter faces the three-way valve (1).

3. The material drying device of engineering plastic processing equipment according to claim 1, characterized in that: A second flange (201) is provided on the outer sides of the upper cover (2), the material frame (3) and the base (4); the upper cover (2), the material frame (3) and the base (4) are fixed by means of the second flange (201) and bolts.

4. The material drying device of engineering plastic processing equipment according to claim 1, characterized in that: The three-way valve (1) and the tapered guide tube (501) are provided with a first flange (101), and the three-way valve (1), the upper cover (2) and the tapered guide tube (501) of the three-way tube (5) are fixed by means of the first flange (101) and bolts.

5. The material drying device of engineering plastic processing equipment according to claim 2, characterized in that: One end of the three-way pipe (5) away from the three-way valve (1) and the base (4) is connected to the high-temperature exhaust gas through the valve.

6. The material drying device of engineering plastic processing equipment according to claim 5, characterized in that: The high-temperature exhaust gas is diverted to the elbow (401) and the tapered guide tube (501) of the tee (5) through the tee (5), and the high-temperature exhaust gas is compressed by the tapered guide tube (501) when passing through the tapered guide tube (501), thereby increasing the flow rate of the high-temperature exhaust gas and generating a negative pressure at the tee valve (1) connected to the tapered guide tube (501) of the tee (5). The negative pressure continuously extracts the gas flowing from the base (4) to the material frame (3), thereby increasing the flow rate of the gas flowing from the base (4) to the material frame (3).

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