Raw material drying device for processing preservative film

Abstract

The invention relates to the technical field of preservative films, and discloses a preservative film processing raw material drying device which comprises a drying cabinet and a functional box arranged in the drying cabinet, and further comprises a support part fixed in the drying cabinet; the vibration tray is fixed above the support part; the upper part of the drying piece is fixed below the vibration tray, and the lower part is fixed in the drying cabinet; the heat circulation part is fixed on the functional box; high-frequency vibration generated by the ultrasonic oscillator drives raw materials in the vibration tray to be synchronously thrown up and down, so that the raw materials form a transient air retention state when rising to the highest point; the control module captures vibration signals of the ultrasonic oscillator in real time through a vibration phase detection algorithm, the on-off time of the hot air channel is accurately controlled in combination with vibration piston position data fed back by the displacement sensor on the guide sliding column, and when raw materials are thrown into the air and detained, the control module immediately triggers the hot air channel to be opened; the hot air flow is sprayed out from the air spraying holes through the hot air outlet pipe and directly acts on the suspended raw materials.

Description

Technical Field

[0001] The invention relates to the technical field of fresh-keeping films, and in particular to a raw material drying device for fresh-keeping film processing. Background Art

[0002] During the production and processing of cling film, the dryness of raw materials (such as polyethylene granules) directly impacts the quality of the final product. Since cling film is mostly made of high-molecular-weight polymer granules, they are susceptible to absorbing moisture from the air during storage and transportation due to changes in ambient humidity, resulting in surface adsorbed water and free water between granules. If this moisture is not completely removed, it will rapidly vaporize due to the high temperatures during the subsequent melt extrusion process, leading to defects such as bubbles and pinholes within the film. In severe cases, this can also cause uneven film thickness and degrade mechanical properties, directly impacting product yield.

[0003] Traditional raw material drying equipment mostly uses static hot air drying. The raw materials are piled up in the tray, and the lower layer of raw materials are easily blocked by the upper layer, resulting in uneven heating and insufficient drying. At the same time, the water evaporated from the raw materials during the drying process tends to accumulate at the bottom of the tray, causing the tray to remain moist for a long time. After some dried raw materials come into contact with the moist tray, they will absorb moisture again, further reducing the drying effect. Summary of the Invention

[0004] The invention provides a raw material drying device for processing fresh-keeping film, which can effectively dry the raw materials of the fresh-keeping film.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows: A raw material drying device for processing fresh-keeping film, comprising: a drying cabinet and a functional box arranged in the drying cabinet, and further comprising: The support member is fixed in the drying cabinet; the vibration tray is fixed above the support member; the drying member is fixed above the vibration tray and below the drying cabinet; the heat circulation member is fixed on the function box; the control module is used to control the movement state of the drying member to dry the raw materials as they rise; The vibration support plate is fixed on the inner wall of the drying cabinet; the vibration cylinder is fixed on the end of the vibration support plate away from the connection to the drying cabinet; the pad is fixed under the vibration tray; the vibration upper plate is fixed under the pad; the vibration piston is slidably arranged in the vibration cylinder; the guide sliding column is slidably arranged on the vibration cylinder, one end is fixed on the vibration upper plate, and the other end is fixed on the vibration piston; the ultrasonic oscillator is fixed under the vibration upper plate and is located between the bottom of the vibration upper plate and the top of the vibration cylinder; the vibration spring has one end fixed in the vibration cylinder and the other end fixed on the vibration piston; the hot air cylinder is fixed at the top of the vibration cylinder; the hot air pipe has one end slidably arranged in the hot air cylinder; the hot air spring has one end fixed in the hot air cylinder and the other end fixed on the hot air pipe; the hot air channel is opened on the vibration cylinder; the hot air inlet pipe is fixed above the vibration cylinder; the soft air pipe is fixed on the hot air inlet pipe; the hot air outlet pipe has one end fixed under the vibration cylinder and the other end fixed under the vibration tray; the air jet hole is opened at the bottom of the vibration tray and is connected with the hot air outlet pipe.

[0006] Furthermore, a sealing rubber ring is fixed under the hot air pipe; and an intercepting mesh plate is fixed to the air jet hole.

[0007] Furthermore, the support member includes: The support plate is fixed in the drying cabinet; the telescopic cylinder is fixed on the support plate; the telescopic core rod is slidably inserted into the telescopic cylinder; the support plate is fixed above the telescopic core rod; one end of the support spring is fixed on the support plate, and the other end is fixed below the support plate.

[0008] Furthermore, the support member further comprises: The pressure sensor is fixed above the support plate; the support pad is fixed above the pressure sensor at the bottom and fixed at the bottom of the vibration tray at the top.

[0009] Furthermore, the thermal cycler comprises: The hot air box is fixed in the function box; the electric heating tube is fixed in the hot air box; the air filter plate is fixed on the function box and connected to the hot air box; the temperature sensor is fixed on the air outlet end of the hot air box; the turbine fan is fixed in the function box; the hot air inlet pipe is fixed on the air outlet end of the hot air box at one end and fixed on the turbine fan at the other end; the hot air supply pipe is fixed on the turbine fan at the top and extends to the drying cabinet at the bottom; the hot air branch pipe is fixed on both sides of the hot air supply pipe at one end and fixed on the soft air pipe at the other end; the flow control valve is fixed on the hot air branch pipe; the thermostat is fixed in the function box.

[0010] Furthermore, the thermal cycler further comprises: The dehumidification box is fixed in the function box; the suction pipe is fixed on the dehumidification box at one end and extends to the drying cabinet at the other end; the exhaust fan is fixed in the function box and the working end is fixed on the suction pipe; the suction hole is opened on the inner top of the drying cabinet and is connected to the suction pipe; the circulating air duct is fixed on the dehumidification box at one end and fixed on the hot air box at the other end.

[0011] Furthermore, a pad is provided under the drying cabinet, a double cabinet door is rotatably provided at the front end of the drying cabinet, a locking plate is rotatably provided on the double cabinet door, and a lock slot plate is fixed on the double cabinet door.

[0012] Furthermore, the control module monitors the vibration signal of the ultrasonic oscillator in real time through a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and at the same time, the displacement sensor integrated in the guide slide collects real-time position data of the vibration piston, and constructs a "vibration phase-piston position" spectrum correlation model through Fourier transform; when it is detected that the ultrasonic oscillator enters the rising vibration stage, the control module triggers the pneumatic control unit to close the hot air channel, and the hot air flow is blocked by the sealing rubber ring between the vibration piston and the end face of the hot air pipe; when it is detected that the ultrasonic oscillator enters the descending vibration stage, the vibration piston descends to the bottom and synchronously triggers the hot air channel to open, so that the hot air flow is ejected through the hot air outlet pipe and the jet hole, ensuring that the hot air flow injection is phase synchronized with the raw material throwing trajectory.

[0013] Furthermore, the control module processes the initial weight data of the raw materials collected by the pressure sensor based on the fuzzy adaptive PID control algorithm, and realizes dynamic matching of ultrasonic power and hot air flow by establishing a fuzzy rule base: when the weight of the raw materials is in the low range, the ultrasonic oscillator is controlled to operate at 40% of the rated power, and the hot air flow is matched with the flow control valve with an opening of 30%; when the weight of the raw materials is in the middle range, the power of the ultrasonic oscillator is automatically adjusted to 60%-75% of the rated power, and the hot air temperature is simultaneously increased to 75°C; when the weight of the raw materials is in the high range, the ultrasonic oscillator is controlled to operate at 90% of the rated power, and the flow control valve of the hot air branch pipe is opened and adjusted to 85% opening. By increasing the vibration frequency, the dispersion of the raw materials is improved, and the heat and mass exchange efficiency is enhanced.

[0014] Furthermore, the control module uses the Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor, and constructs a state space model of the drying process in combination with the hot air temperature data of the temperature sensor: when the weight attenuation rate drops to 0.3% / min, it is determined that the raw material is close to the drying end point, and the PID parameter self-tuning program is automatically started, and the ultrasonic oscillator power is gradually reduced to 30% of the rated power, and the hot air temperature is lowered to 55°C; when the weight attenuation rate changes by less than 0.05% for five consecutive sampling cycles, it is determined that the drying is completed, the ultrasonic oscillator is controlled to stop running, the flow control valve is closed, and the exhaust fan is started for 12 seconds to discharge residual moisture; if it is detected that the hot air temperature deviation exceeds ±3°C or the ultrasonic oscillator vibration frequency offset exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered, the fault type is identified through characteristic parameter comparison, and the corresponding safety protection strategy is executed, and the fault code is stored in the EEPROM.

[0015] The above solution of the present invention includes at least the following beneficial effects: The present invention uses high-frequency vibrations generated by an ultrasonic oscillator to synchronously throw the raw materials in the vibrating tray up and down, causing them to briefly stagnate in the air when they reach their highest point. A control module uses a vibration phase detection algorithm to capture the ultrasonic oscillator's vibration signals in real time. Combined with the position data of the vibrating piston fed back by a displacement sensor on the guide column, this module precisely controls the opening and closing timing of the hot air channel. When the raw materials are thrown into the air and stagnate, the control module immediately triggers the hot air channel to open. Hot air flows through the hot air outlet pipe and out of the air jet hole, directly acting on the suspended raw materials. At this point, the raw materials are completely separated from the vibrating tray, allowing the hot air flow to unobstructedly envelop each grain of raw material, efficiently removing surface and interstitial moisture. When the raw materials fall back due to vibration, the control module simultaneously closes the hot air channel to prevent the hot air flow from directly impacting the tray bottom. This "vibration-hot air" synergistic mechanism, driven by the control module, not only ensures more complete contact between the hot air flow and the raw materials, significantly improving drying efficiency, but also fundamentally prevents moisture accumulation in the vibrating tray, keeping the tray dry and clean at all times, reducing the risk of secondary moisture absorption from contact with a damp tray, and providing a stable and dry raw material foundation for subsequent processing.

[0016] When the ultrasonic oscillator is started, the up and down vibrations generated by it will drive the vibrating tray to move synchronously: when vibrating upward, the vibrating upper plate drives the vibrating piston to move upward through the guide sliding column, blocking the sealing rubber ring of the hot air pipe, blocking the hot air channel, and the hot air flow cannot be ejected from the air jet hole through the hot air outlet pipe. At this time, the hot air pipe retracts into the hot cylinder and compresses the hot air spring to ensure that the seal is in place, and the raw material is lifted up with the tray; when vibrating downward, the raw material will be temporarily retained in the air when it reaches the highest point, and the vibrating piston will move downward by the vibration spring, and the hot air pipe will extend out of the hot cylinder under the action of the hot air spring. After the vibrating piston is no longer blocked, the hot air flow will be ejected from the air jet hole through the hot air channel, hot cylinder, hot air pipe, and hot air outlet pipe in turn, thereby drying the raw material in the air; when the vibrating piston moves to the lowest point, the ultrasonic oscillator vibrates again, the vibrating piston is re-sealed, the raw material falls back to the tray, and the hot air flow stops being ejected, and this cycle is repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a drying cabinet for a raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention; Figure 2 A raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention Figure 1 A magnified view of point A; Figure 3 A raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention Figure 1 Enlarged view of point B; Figure 4 A schematic diagram of the overall structure of a raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention; Figure 5 A schematic diagram of the hot air delivery pipe structure of a raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention; Figure 6 A raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention Figure 5 Enlarged view of point C; Figure 7 A schematic diagram of the structure of a pressure sensor for a raw material drying device for processing cling film provided by an embodiment of the present invention; Figure 8 A schematic diagram of the hot air inlet structure of a raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention; Figure 9 A raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention Figure 8 Enlarged view of point D; Figure 10 A cross-sectional view of a vibrating drum of a raw material drying device for processing fresh-keeping film provided by an embodiment of the present invention; Figure 11This is a flow chart of a control module of a raw material drying device for processing cling film provided by an embodiment of the present invention.

[0018] Description of reference numerals: In the figure: 1. Drying cabinet; 101. Pad; 102. Double cabinet door; 103. Locking plate; 104. Lock slot plate; 2. Function box; 3. Support member; 301. Support plate; 302. Telescopic cylinder; 303. Telescopic core rod; 304. Support plate; 305. Support spring; 306. Pressure sensor; 307. Support pad; 4. Vibrating tray; 5. Drying member; 501. Vibrating support plate; 502. Vibrating cylinder; 503. Pad column; 504. Vibrating upper plate; 505. Vibrating piston; 506. Guide column; 507. Ultrasonic oscillator; 508. Vibrating spring; 509. Hot air cylinder; 5010. Hot air pipe; 5011. Hot air spring; 5012, hot air channel; 5013, hot air inlet pipe; 5014, soft air pipe; 5015, hot air outlet pipe; 5016, air jet hole; 5017, sealing rubber ring; 5018, interception mesh plate; 6, thermal circulation component; 601, hot air box; 602, electric heating pipe; 603, air filter plate; 604, temperature sensor; 605, turbo fan; 606, hot air inlet pipe; 607, hot air delivery pipe; 608, hot air branch pipe; 609, flow control valve; 6010, thermostat; 6011, dehumidification box; 6012, suction pipe; 6013, exhaust fan; 6014, suction hole; 6015, circulating air duct. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0020] like Figures 1 to 10 As shown, an embodiment of the present invention provides a raw material drying device for cling film processing, comprising: a drying cabinet 1 and a functional box 2 arranged in the drying cabinet 1, and also comprising: a support member 3 fixed in the drying cabinet 1; a vibration tray 4 fixed above the support member 3; a drying member 5, the upper part of which is fixed below the vibration tray 4 and the lower part is fixed in the drying cabinet 1; a heat circulation member 6, fixed on the functional box 2; and a control module for controlling the movement state of the drying member 5 to dry the raw materials when they rise.

[0021] The vibration support plate 501 is fixed on the inner wall of the drying cabinet 1; the vibration cylinder 502 is fixed on the end of the vibration support plate 501 away from the drying cabinet 1; the pad 503 is fixed under the vibration tray 4; the vibration upper plate 504 is fixed under the pad 503; the vibration piston 505 is slidably set in the vibration cylinder 502; the guide slide 506 is slidably set on the vibration cylinder 502, one end of which is fixed on the vibration upper plate 504, and the other end is fixed on the vibration piston 505; the ultrasonic oscillator 507 is fixed under the vibration upper plate 504 and is located between the bottom of the vibration upper plate 504 and the top of the vibration cylinder 502; the vibration spring 508 has one end fixed in the vibration cylinder 502 and the other end fixed on the vibration piston 505; the hot air cylinder 509 is fixed Fixed at the top of the vibration cylinder 502; the hot air pipe 5010, one end of which is slidably set in the hot air cylinder 509; the hot air spring 5011, one end of which is fixed in the hot air cylinder 509, and the other end is fixed on the hot air pipe 5010; the hot air channel 5012 is opened on the vibration cylinder 502; the hot air inlet pipe 5013 is fixed on the top of the vibration cylinder 502; the soft air pipe 5014 is fixed on the hot air inlet pipe 5013; the hot air outlet pipe 5015, one end of which is fixed below the vibration cylinder 502, and the other end is fixed below the vibration tray 4; the air jet hole 5016 is opened at the bottom of the vibration tray 4 and is connected to the hot air outlet pipe 5015; a sealing rubber ring 5017 is fixed under the hot air pipe 5010; the air jet hole 5016 is fixed with an intercepting mesh plate 5018.

[0022] A pad 101 is provided under the drying cabinet 1 , and a double cabinet door 102 is rotatably provided at the front end of the drying cabinet 1 , a locking plate 103 is rotatably provided on the double cabinet door 102 , and a lock slot plate 104 is fixed to the double cabinet door 102 .

[0023] Specifically, the double cabinet doors 102 are used to open the drying cabinet 1 , and the rotating locking plate 103 is locked into the lock slot plate 104 , and the double cabinet doors 102 can be in a closed and sealed state.

[0024] As a preferred embodiment of the present invention, the support member 3 includes: a support plate 301, fixed in the drying cabinet 1; a telescopic cylinder 302, fixed on the support plate 301; a telescopic core rod 303, slidingly inserted into the telescopic cylinder 302 at the bottom; a support plate 304, fixed above the telescopic core rod 303; a support spring 305, one end of which is fixed on the support plate 301 and the other end is fixed below the support plate 304; the support member 3 also includes: a pressure sensor 306, fixed above the support plate 304; a support pad 307, fixed above the pressure sensor 306 at the bottom and fixed to the bottom of the vibration tray 4 at the top.

[0025] Specifically, the telescopic cylinder 302 , the telescopic core rod 303 and the support spring 305 are used to provide elastic support to facilitate the up and down vibration of the vibration tray 4 ; the pressure sensor 306 is used to detect the weight of the raw materials on the vibration tray 4 .

[0026] As a preferred embodiment of the present invention, the heat circulation component 6 includes: a hot air box 601, fixed in the function box 2; an electric heating pipe 602, fixed in the hot air box 601; an air filter plate 603, fixed on the function box 2 and connected to the hot air box 601; a temperature sensor 604, fixed on the air outlet end of the hot air box 601; a turbine fan 605, fixed in the function box 2; a hot air inlet pipe 606, one end of which is fixed on the air outlet end of the hot air box 601, and the other end is fixed on the turbine fan 605; a hot air supply pipe 607, which is fixed on the turbine fan 605 at the top and extends to the drying cabinet 1 at the bottom; a hot air branch pipe 608, one end of which is fixed on both sides of the hot air supply pipe 607, and the other end is fixed on the soft air pipe 5014; a flow control valve 609, which is fixed on the hot air branch pipe 608; and a thermostat 6010, fixed in the function box 2.

[0027] The heat circulation component 6 also includes: a dehumidification box 6011, fixed in the function box 2; an air suction pipe 6012, one end of which is fixed on the dehumidification box 6011 and the other end extends to the drying cabinet 1; an exhaust fan 6013, fixed in the function box 2, and the working end is fixed on the air suction pipe 6012; an air suction hole 6014, which is opened on the inner top of the drying cabinet 1 and is connected to the air suction pipe 6012; a circulating air duct 6015, one end of which is fixed on the dehumidification box 6011 and the other end is fixed on the hot air box 601.

[0028] Specifically, the thermostat 6010 is used to control the temperature of the electric heating tube 602; a molecular sieve or a silica gel dryer can be set in the dehumidification box 6011 to remove moisture from the hot air flow and return the hot air flow to the hot air box 601 to save energy loss.

[0029] The present invention is used to dry and process the raw materials of the cling film. During storage and transportation, the raw materials of the cling film will absorb moisture in the air due to the ambient humidity, forming surface adsorbed water or free water between particles. If this moisture is not removed, the moisture will be vaporized due to high temperature in the subsequent melt extrusion process, and then form bubbles or pinholes, resulting in holes and uneven thickness of the cling film.

[0030] During use, the raw materials can be evenly spread in the vibration tray 4, or they can be spread flat in a small grid frame, and then the grid frame containing the raw materials can be placed in the vibration tray 4; with the help of the grid frame, the material removal operation after drying can be facilitated, and the grid frame can be fixedly connected to the vibration tray 4 by a clip or a snap connection; the vibration trays 4 are arranged in two rows in the drying cabinet 1, and their number can be increased or decreased according to demand when the drying device is produced.

[0031] The support plate 301, telescopic cylinder 302, telescopic core rod 303, support plate 304, support spring 305, pressure sensor 306 and support pad 307 together constitute a support structure, which supports the vibration tray 4; the telescopic cylinder 302, telescopic core rod 303 and support spring 305 play the role of elastic support; the pressure sensor 306 is used to detect the initial weight of the vibration tray 4, as well as the total weight of the grid frame and raw materials, and then match the appropriate power of the ultrasonic oscillator 507.

[0032] Start the electric heating tube 602 in the hot air box 601, and the electric heating tube 602 will generate heat; at the same time, start the turbo fan 605, and the turbo fan 605 draws air from the hot air box 601 through the hot air inlet pipe 606; the temperature sensor 604 is used to detect the temperature of the air outlet of the hot air box 601, and the hot air box 601 inhales external air through the air filter plate 603; the heated hot air flow enters the hot air supply pipe 607, and the hot air supply pipe 607 transports the hot air flow to the hot air branch pipe 608; each hot air branch pipe 608 is provided with a flow control valve 609, and each flow control valve 609 controls a corresponding vibrating tray 4; when the flow control valve 609 is opened, the hot air branch pipe 608 is connected to the soft air pipe 5014; the flow control valve 609 is used to control the flow of hot air in the hot air branch pipe 608.

[0033] The hot air flow in the soft air pipe 5014 enters the hot air inlet pipe 5013, then flows through the hot air channel 5012 in sequence into the vibrating cylinder 502, and then flows out of the vibrating cylinder 502 through the hot air outlet pipe 5015; the hot air flow enters the air jet hole 5016 through the hot air outlet pipe 5015, and is finally ejected from the air jet hole 5016, contacting and drying the raw material.

[0034] The ultrasonic oscillator 507 is started, and the ultrasonic oscillator 507 generates up and down vibrations, thereby driving the vibration tray 4 to vibrate up and down synchronously.

[0035] When the ultrasonic oscillator 507 vibrates upward, it drives the vibrating upper plate 504 and the vibrating tray 4 to move upward; the vibrating upper plate 504 drives the guide slide 506 to slide upward in the vibrating cylinder 502, and the guide slide 506 then drives the vibrating piston 505 to move upward; when the vibrating piston 505 moves upward, it blocks the sealing rubber ring 5017 of the hot air pipe 5010, so that the hot air flow in the hot air channel 5012 is blocked by the vibrating piston 505 and cannot flow to the hot air outlet pipe 5015. , the jet hole 5016 no longer sprays out hot air, and the raw materials in the vibrating tray 4 are then vibrated and lifted up; during the upward movement of the vibrating piston 505, the hot air pipe 5010 will retract into the hot air cylinder 509, and at the same time, the hot air pipe 5010 compresses the hot air spring 5011. This design can ensure that the vibrating piston 505 is always effectively sealed with the sealing rubber ring 5017 of the hot air pipe 5010 during the upward process, ensuring that the hot air flow stops flowing to the hot air outlet pipe 5015.

[0036] When the ultrasonic oscillator 507 vibrates downward, it drives the vibrating upper plate 504 and the vibrating tray 4 to move downward; the raw material will have a small retention time when it reaches the highest point. During the retention period of the raw material in the air, the vibrating piston 505 begins to move downward with the help of the vibrating spring 508. At the same time, the hot air pipe 5010 extends downward from the hot cylinder 509 under the action of the hot air spring 5011. When the hot air pipe 5010 is completely extended from the hot cylinder 509, the vibrating piston 505 continues to move downward. At this time, the vibrating piston 505 no longer blocks the sealing rubber ring 5017 of the hot air pipe 5010, and the hot air flow passes through the hot air channel 5012 and the hot air cylinder 509. The air flows out of the cylinder 509 and the hot air pipe 5010, enters the hot air outlet pipe 5015, and is then ejected through the air jet hole 5016; at this time, the raw material is still in the air, and there is a certain distance between it and the inner bottom of the vibration tray 4, and the raw material is dried just when it is in the air; when the vibration piston 505 moves downward to the lowest point, the ultrasonic oscillator 507 vibrates upward again, and the vibration piston 505 moves upward accordingly, and is sealed with the sealing rubber ring 5017 of the hot air pipe 5010 again. At this time, the raw material returns to the vibration tray 4, and the hot air flow no longer ejects from the air jet hole 5016; the ultrasonic oscillator 507 vibrates up and down in this way, working reciprocatingly.

[0037] During the process of being dried by the hot air flow, the raw materials are always in a state of being separated from the vibrating tray 4. The hot air flow can completely carry the moisture emitted by the raw materials upward to prevent the moisture emitted by the raw materials from gathering in the vibrating tray 4, thereby keeping the inside of the vibrating tray 4 dry and effectively dissipating heat. Due to the up and down vibration of the ultrasonic oscillator 507, the raw materials will continuously change the surface facing the hot air flow to achieve efficient drying.

[0038] After the exhaust fan 6013 is started, the exhaust fan 6013 draws out the hot air inside the drying cabinet 1 through the suction pipe 6012 and the suction hole 6014; the hot air enters the dehumidification box 6011 through the suction pipe 6012, and after the moisture carried by it is removed in the dehumidification box 6011, it enters the hot air box 601 through the circulating air duct 6015, thereby saving energy consumption.

[0039] like Figure 11 As shown, an embodiment of the present invention provides a raw material drying device for processing plastic wrap. The control module monitors the vibration signal of the ultrasonic oscillator 507 in real time through a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and simultaneously collects real-time position data of the vibrating piston 505 through a displacement sensor integrated in the guide slide 506. A "vibration phase-piston position" spectrum correlation model is constructed through Fourier transform. When it is detected that the ultrasonic oscillator 507 enters the rising vibration phase, the control module triggers the pneumatic control unit to close the hot air channel 5012, and the hot air flow is blocked by the sealing rubber ring 5017 on the end face of the vibrating piston 505 and the hot air pipe 5010. When it is detected that the ultrasonic oscillator 507 enters the descending vibration phase, the vibrating piston 505 descends to the bottom and synchronously triggers the opening of the hot air channel 5012, so that the hot air flow is ejected through the hot air outlet pipe 5015 and the air jet hole 5016, ensuring that the hot air flow injection is phase-synchronized with the raw material throwing trajectory.

[0040] The control module processes the initial weight data of the raw materials collected by the pressure sensor 306 based on the fuzzy adaptive PID control algorithm, and realizes the dynamic matching of ultrasonic power and hot air flow by establishing a fuzzy rule base: when the weight of the raw materials is in the low range, the ultrasonic oscillator 507 is controlled to operate at 40% of the rated power, and the hot air flow with the flow control valve 609 opening at 30% is matched; when the weight of the raw materials is in the middle range, the power of the ultrasonic oscillator 507 is automatically adjusted to 60%-75% of the rated power, and the hot air temperature is simultaneously increased to 75°C; when the weight of the raw materials is in the high range, the ultrasonic oscillator 507 is controlled to operate at 90% of the rated power, and the flow control valve 609 of the hot air branch pipe 608 is opened and adjusted to 85% opening. By increasing the vibration frequency, the dispersion of the raw materials is improved, and the heat and mass exchange efficiency is enhanced.

[0041] The control module uses the Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor 306, and combines it with the hot air temperature data of the temperature sensor 604 to construct a state space model of the drying process: when the weight decay rate drops to 0.3% / min, it is determined that the raw material is close to the drying end point, and the PID parameter self-tuning program is automatically started, gradually reducing the power of the ultrasonic oscillator 507 to 30% of the rated power, and the hot air temperature is lowered to 55°C; when the weight decay rate changes by less than 0.05% for five consecutive sampling cycles, it is determined that the drying is complete, the ultrasonic oscillator 507 is controlled to stop running, the flow control valve 609 is closed, and the exhaust fan 6013 is started to run for 12 seconds to expel residual moisture; if it is detected that the hot air temperature deviation exceeds ±3°C or the vibration frequency offset of the ultrasonic oscillator 507 exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered, the fault type is identified through characteristic parameter comparison, and the corresponding safety protection strategy is executed, and the fault code is stored in the EEPROM.

[0042] Example 1: This embodiment provides a basic device for drying raw materials for cling film processing, the core of which is to achieve efficient drying of raw materials through mechanical coordination of vibration and hot air; the main frame of this device is composed of a drying cabinet 1 and a functional box 2. The vibration tray 4 is supported by a support member 3 in the drying cabinet 1, and a drying member 5 is connected to the bottom of the tray. A heat circulation member 6 is fixed on the functional box 2, forming a complete structural chain of "support-vibration-heating".

[0043] The support member 3 adopts an elastic support design, and the telescopic cylinder 302, telescopic core rod 303 and support spring 305 cooperate to provide stable support for the vibration tray 4, which can flexibly expand and contract with the vibration to avoid rigid connection hindering vibration; the pressure sensor 306 is installed between the support plate 304 and the vibration tray 4, which can detect the weight of the raw materials in real time and provide basic data for subsequent drying parameter adjustment; the core of the drying member 5 is the ultrasonic oscillator 507, and the up and down vibrations generated by the ultrasonic oscillator 507 are transmitted to the vibration tray 4 through the vibration upper plate 504 and the guide slide column 506, so that the raw materials are thrown synchronously with the tray; at the same time, the vibration piston 505 slides with the vibration in the vibration cylinder 502, and through contact and separation with the sealing rubber ring 5017 under the hot air pipe 5010, it accurately controls the on and off of the hot air channel 5012, blocks the hot air when the raw materials rise, and avoids vibration When the tray 4 comes into contact with the raw materials, moisture is removed, causing the moisture to adhere to the vibrating tray 4; when the raw materials fall and remain in the air, the channel is opened, and the hot air flow is ejected from the jet hole 5016 through the hot air outlet pipe 5015, directly acting on the suspended raw materials. At this time, the raw materials are dispersed due to vibration, the heating area is significantly increased, and the water evaporation efficiency is greatly improved; the heat circulation component 6 heats the air through the electric heating tube 602 in the hot air box 601, and transports it to each vibrating tray 4 through the turbine fan 605. The flow control valve 609 can individually adjust the hot air flow intensity of each vibrating tray 4; at the same time, the humid hot air flow is dried by the dehumidification box 6011 and then flows back to the hot air box 601, realizing heat recycling and reducing energy consumption; the double cabinet doors 102 of the drying cabinet 1 are sealed by the locking plate 103 and the lock slot plate 104 to avoid heat loss and further ensure the stability of the drying environment.

[0044] This embodiment is suitable for scenarios with basic requirements for drying efficiency. Through the coordinated design of the mechanical structure, it solves the problems of uneven heating and low heat utilization caused by the accumulation of raw materials in traditional drying. It can effectively remove moisture from the surface of the cling film raw material and the gaps between particles, providing raw materials with satisfactory dryness for the subsequent melt extrusion process.

[0045] Example 2: This embodiment adds an intelligent control module to the basic device of Example 1, and realizes dynamic adaptation of vibration parameters and hot air parameters through algorithms. The core is the closed-loop control logic of "perception-analysis-adjustment".

[0046] The control module first captures the vibration signal of the ultrasonic oscillator 507 in real time through the vibration phase detection algorithm, and extracts the key phase points such as the rise and fall within the vibration cycle; the displacement sensor on the guide slide 506 synchronously collects the position data of the vibration piston 505, and establishes the "vibration phase-piston position" correlation model through Fourier transform to ensure accurate perception of the vibration state; when it is detected that the ultrasonic oscillator 507 enters the rising phase, the control module immediately triggers the pneumatic control unit, and closes the hot air channel 5012 through the close contact between the vibration piston 505 and the sealing rubber ring 5017. At this time, the raw material is lifted up with the vibration tray 4, and the hot air injection is suspended; when entering the descending phase, when the vibration piston 505 descends to the corresponding position, the control module synchronously opens the hot air channel 5012, and the hot air flow is ejected just when the raw material is trapped in the air, and is completely synchronized with the raw material throwing trajectory, avoiding efficiency loss caused by the "misalignment" of the hot air and the raw material; the hot air flow effectively takes away moisture, so that the vibration tray 4 remains dry.

[0047] For raw materials of different weights, the control module adopts a fuzzy adaptive PID control algorithm and establishes an adjustment rule based on the initial weight data collected by the pressure sensor 306: when the weight of the raw material is in a low range (such as the single drying volume is less than 30% of the total capacity), the ultrasonic oscillator 507 is controlled to operate at 40% of the rated power, and the flow control valve 609 is adjusted to 30% of the opening to reduce the vibration amplitude and hot air flow to avoid a small amount of raw materials from splashing due to violent vibration; when the weight is in the middle range (30% to 70%), the ultrasonic oscillator 507 is automatically increased. The ultrasonic power is increased to 60% to 75%, the hot air temperature is adjusted to 75°C through the thermostat 6010, and the flow control valve 609 is adjusted to an opening of 50% to 65%. At this time, the vibration intensity and heat supply are balanced, which can ensure that the raw materials are fully dispersed and avoid overheating; when the weight is in the high range (above 70%), the ultrasonic power is increased to 90% to enhance the vibration dispersion effect, and the flow control valve 609 is opened to 85%. By increasing the hot air flow, the heat and mass exchange is enhanced to ensure that a large amount of raw materials reach the drying standard within the same time.

[0048] This embodiment compensates for the lag of manual adjustment through an intelligent algorithm, allowing the equipment to automatically adapt to the optimal parameters according to the amount of raw materials, thereby improving drying uniformity while reducing energy consumption. When drying the raw materials, they are all in a state of being retained in the air, and the hot air flow effectively carries moisture, so that the vibrating tray 4 remains dry.

[0049] Example 3: Based on the intelligent control of Example 2, this embodiment further improves the automation and safety of the entire drying process, and realizes closed-loop production through accurate endpoint determination and fault warning.

[0050] The control module uses the Kalman filter algorithm to process the real-time weight data collected by the pressure sensor 306, filters out interference factors such as vibration and airflow, and constructs a drying state model in combination with the hot air temperature data of the temperature sensor 604 to calculate the weight decay rate (water evaporation rate) of the raw material in real time. When the decay rate drops to 0.3% / min, the system determines that the raw material is close to the end of drying. At this time, the PID parameter self-tuning program is automatically started, and the power of the ultrasonic oscillator 507 is gradually reduced to 30%, and the hot air temperature is lowered to 55°C to reduce vibration and heat input, thereby preventing the raw material from becoming brittle and deteriorating due to excessive drying. When the change rate of the weight decay rate is less than 0.05% for five consecutive sampling cycles (each cycle is 10 seconds), the drying is determined to be complete, the ultrasonic vibration and hot air supply are immediately stopped, the flow control valve 609 is closed, and the exhaust fan 6013 is started and runs for 12 seconds to discharge the remaining hot and humid air in the drying cabinet 1 through the suction hole 6014 to ensure that the raw material is in a dry state when it is taken out.

[0051] To ensure stable operation of the equipment, the system has a built-in fault monitoring mechanism: real-time comparison of the detection value of the temperature sensor 604 with the set value. If the hot air temperature deviation exceeds ±3°C, such as the set value of 75°C is actually lower than 72°C or higher than 78°C; through vibration signal analysis, it is found that the frequency deviation of the ultrasonic oscillator 507 exceeds 8%, and the fuzzy neural network fault diagnosis system is immediately triggered; the fuzzy neural network fault diagnosis system compares the preset characteristic parameter library, such as the temperature drop corresponding to the electric heating tube failure, and the frequency fluctuation corresponding to the oscillator abnormality; quickly identifies the fault type, such as electric heating tube damage, airflow blockage, oscillator aging, etc.; and executes the corresponding protection strategy. If it is a slight temperature deviation, the electric heating tube power is automatically adjusted; if it is a serious fault, such as frequency abnormality, the equipment operation is immediately stopped and an audible and visual alarm is issued. At the same time, the fault code is stored in the EEPROM to facilitate maintenance personnel to trace the cause.

[0052] This embodiment solves the quality fluctuation problem caused by the traditional drying method of "determining the end point based on experience", reduces human intervention through automated processes, and reduces the risk of equipment damage through fault warnings. It is suitable for large-scale production lines with high requirements for production stability and safety.

[0053] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A raw material drying device for processing fresh-keeping film, comprising: The drying cabinet and the functional box provided in the drying cabinet are characterized in that they further include: The support member is fixed in the drying cabinet; the vibration tray is fixed above the support member; the drying member is fixed above the vibration tray and below the drying cabinet; the heat circulation member is fixed on the function box; the control module is used to control the movement state of the drying member to dry the raw materials as they rise; The vibration support plate is fixed on the inner wall of the drying cabinet; the vibration cylinder is fixed on the end of the vibration support plate away from the connection to the drying cabinet; the pad is fixed under the vibration tray; the vibration upper plate is fixed under the pad; the vibration piston is slidably arranged in the vibration cylinder; the guide sliding column is slidably arranged on the vibration cylinder, one end is fixed on the vibration upper plate, and the other end is fixed on the vibration piston; the ultrasonic oscillator is fixed under the vibration upper plate and is located between the bottom of the vibration upper plate and the top of the vibration cylinder; the vibration spring has one end fixed in the vibration cylinder and the other end fixed on the vibration piston; the hot air cylinder is fixed at the top of the vibration cylinder; the hot air pipe has one end slidably arranged in the hot air cylinder; the hot air spring has one end fixed in the hot air cylinder and the other end fixed on the hot air pipe; the hot air channel is opened on the vibration cylinder; the hot air inlet pipe is fixed above the vibration cylinder; the soft air pipe is fixed on the hot air inlet pipe; the hot air outlet pipe has one end fixed under the vibration cylinder and the other end fixed under the vibration tray; the air jet hole is opened at the bottom of the vibration tray and is connected with the hot air outlet pipe.

2. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: A sealing rubber ring is fixed under the hot air pipe; and an intercepting mesh plate is fixed to the air jet hole.

3. A raw material drying device for processing fresh-keeping film according to claim 1, characterized in that: The support member comprises: The support plate is fixed in the drying cabinet; the telescopic cylinder is fixed on the support plate; the telescopic core rod is slidably inserted into the telescopic cylinder; the support plate is fixed above the telescopic core rod; one end of the support spring is fixed on the support plate, and the other end is fixed below the support plate.

4. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: The support member further comprises: The pressure sensor is fixed above the support plate; the support pad is fixed above the pressure sensor at the bottom and fixed at the bottom of the vibration tray at the top.

5. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: The thermal cycler comprises: The hot air box is fixed in the function box; the electric heating tube is fixed in the hot air box; the air filter plate is fixed on the function box and connected to the hot air box; the temperature sensor is fixed on the air outlet end of the hot air box; the turbine fan is fixed in the function box; the hot air inlet pipe is fixed on the air outlet end of the hot air box at one end and fixed on the turbine fan at the other end; the hot air supply pipe is fixed on the turbine fan at the top and extends to the drying cabinet at the bottom; the hot air branch pipe is fixed on both sides of the hot air supply pipe at one end and fixed on the soft air pipe at the other end; the flow control valve is fixed on the hot air branch pipe; the thermostat is fixed in the function box.

6. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: The thermal cycler also includes: The dehumidification box is fixed in the function box; the suction pipe is fixed on the dehumidification box at one end and extends to the drying cabinet at the other end; the exhaust fan is fixed in the function box and the working end is fixed on the suction pipe; the suction hole is opened on the inner top of the drying cabinet and is connected to the suction pipe; the circulating air duct is fixed on the dehumidification box at one end and fixed on the hot air box at the other end.

7. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: A cushion block is provided under the drying cabinet, a double cabinet door is rotatably provided at the front end of the drying cabinet, a locking plate is rotatably provided on the double cabinet door, and a lock slot plate is fixed on the double cabinet door.

8. A drying device for raw materials for processing fresh-keeping film according to claim 1, characterized in that: The control module monitors the vibration signal of the ultrasonic oscillator in real time through a vibration phase detection algorithm, extracts key phase points within the vibration cycle, and simultaneously uses a displacement sensor integrated in the guide slide to collect real-time position data of the vibrating piston. A "vibration phase-piston position" spectrum correlation model is constructed through Fourier transform. When it is detected that the ultrasonic oscillator enters the rising vibration phase, the control module triggers the pneumatic control unit to close the hot gas channel, and the hot gas flow is blocked by the sealing rubber ring between the vibrating piston and the end face of the hot gas pipe. When it is detected that the ultrasonic oscillator enters the descending vibration phase, the vibrating piston descends to the bottom and synchronously triggers the opening of the hot gas channel, allowing the hot gas flow to be ejected through the hot gas outlet pipe and the jet hole, ensuring that the hot gas injection is phase-synchronized with the raw material throwing trajectory.

9. A drying device for raw materials for processing fresh-keeping film according to claim 8, characterized in that: The control module processes the initial weight data of the raw materials collected by the pressure sensor based on the fuzzy adaptive PID control algorithm, and realizes dynamic matching of ultrasonic power and hot air flow by establishing a fuzzy rule base: when the weight of the raw materials is in the low range, the ultrasonic oscillator is controlled to operate at 40% of the rated power, and the hot air flow is matched with the flow control valve with a 30% opening; when the weight of the raw materials is in the middle range, the power of the ultrasonic oscillator is automatically adjusted to 60%-75% of the rated power, and the hot air temperature is simultaneously increased to 75°C; when the weight of the raw materials is in the high range, the ultrasonic oscillator is controlled to operate at 90% of the rated power, and the flow control valve of the hot air branch pipe is opened and adjusted to 85% opening. By increasing the vibration frequency, the dispersion of the raw materials is improved, and the heat and mass exchange efficiency is enhanced.

10. A drying device for raw materials for processing fresh-keeping film according to claim 9, characterized in that: The control module uses a Kalman filter algorithm to denoise the real-time weight data collected by the pressure sensor, and constructs a state-space model of the drying process in combination with the hot air temperature data from the temperature sensor: when the weight decay rate drops to 0.3% / min, it is determined that the raw material is close to the drying end point, and the PID parameter self-tuning program is automatically started, gradually reducing the ultrasonic oscillator power to 30% of the rated power and the hot air temperature to 55°C; when the weight decay rate changes by less than 0.05% for five consecutive sampling cycles, it is determined that the drying is complete, the ultrasonic oscillator is controlled to stop running, the flow control valve is closed, and the exhaust fan is started for 12 seconds to expel residual moisture; if it is detected that the hot air temperature deviation exceeds ±3°C or the ultrasonic oscillator vibration frequency offset exceeds 8%, the fuzzy neural network fault diagnosis system is immediately triggered, the fault type is identified through characteristic parameter comparison, and the corresponding safety protection strategy is executed, and the fault code is stored in the EEPROM.

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