Freeze drying device and process for ethylene-propylene insulation material production

Abstract

The invention relates to the technical field of ethylene-propylene insulation material production, in particular to a freeze-drying device and process for ethylene-propylene insulation material production, comprising a moving seat, a plurality of traveling wheels arranged at the bottom end of the moving seat, a plurality of positioning plates arranged at the top end of the moving seat, and circular positioning rings arranged at the tops of the plurality of positioning plates; the drying assembly is arranged among the plurality of positioning rings; the plasma generator is arranged at one end of the freeze drying cylinder, and the plasma generator is used for accelerating sublimation during drying treatment of the ethylene-propylene insulating material and modifying the surface of the ethylene-propylene insulating material after drying treatment; and the condensation assemblies are arranged at the upper ends of the positioning rings correspondingly. Compared with the prior art, by arranging the condensation assembly, the system stability and repeatability in continuous operation are ensured, energy waste and equipment loss are avoided, and the overall production efficiency and the equipment reliability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ethylene propylene insulating material production, and in particular to a freeze drying device and process for producing ethylene propylene insulating material. Background Art

[0002] EPDM insulation material is a cable or equipment insulation material made of EPDM rubber as the base material. It is widely used in the fields of electricity, automobile and communication due to its excellent aging resistance, high and low temperature resistance, UV resistance and insulation performance. The application of freeze drying in its production is mainly to improve the purity and processing performance of the material. Plasticizers, fillers and additives need to be added to EPDM rubber during the mixing process, but these ingredients may carry moisture or volatile impurities, and moisture and impurities can easily affect the uniformity of the mixture and electrical insulation performance. Through freeze drying, the material is frozen at low temperature and then directly sublimated in a vacuum environment to remove moisture, avoiding decomposition or performance degradation that may be caused by traditional thermal drying. This process ensures that EPDM insulation material has better mechanical strength and stable insulation effect, and is suitable for high-demand application environments.

[0003] The gas generated by traditional devices during the freeze-drying process will generally be condensed and discharged through the condenser. However, when there is a lot of water vapor, some of the gas will still not be fully cooled into liquid water, affecting the drying effect. In addition, the waste gas or uncondensed impurity gas generated will accumulate inside the condenser during the condensation process. If these gases are not effectively cleaned, they will accumulate in the system, reducing the efficiency of the condensation module, increasing energy consumption and equipment wear. Therefore, the present application discloses a freeze-drying device and process for the production of EPDM insulation materials. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a freeze-drying device and process for the production of EPDM insulation materials to solve the problem of gas accumulation in the system, reduced efficiency of the condensation module, increased energy consumption and equipment wear.

[0005] Based on the above purpose, the present invention provides a freeze-drying device and process for the production of ethylene-propylene insulating materials, comprising a moving seat, a plurality of walking wheels are arranged at the bottom end of the moving seat, a plurality of positioning plates are arranged at the top end of the moving seat, and a circular positioning ring is arranged at the top of the plurality of positioning plates;

[0006] A drying component, the drying component is arranged between the plurality of the positioning rings, the drying component comprises a freeze drying cylinder fixedly installed between the plurality of the positioning rings and a placement module movably installed inside the freeze drying cylinder, the placement module is used to place ethylene-propylene insulating material, and the freeze drying cylinder is used to dry the ethylene-propylene insulating material placed on the placement module;

[0007] A plasma generator, which is disposed at one end of the freeze-drying cylinder and is used to accelerate sublimation when drying the ethylene-propylene insulating material, and to perform surface modification on the ethylene-propylene insulating material after drying;

[0008] A plurality of condensation components are respectively arranged at the upper ends of the plurality of positioning rings, and the plurality of condensation components are arranged through the positioning rings and the freeze drying cylinder, the condensation components include a condensation module and a gap extraction module, the condensation module is used for condensing and collecting the gas generated during the drying, and the gap extraction module is used for gap removal of the gas remaining in the condensation module.

[0009] Preferably, a plurality of heating wires are provided at the inner bottom end of the freeze drying cylinder, and the heating wires are used to heat the inside of the freeze drying cylinder. A plurality of observation windows are provided on the outer surface of the freeze drying cylinder, and a plurality of the observation windows are transparent. A vacuum pump is also provided on one side of the freeze drying cylinder.

[0010] Preferably, the placement module includes a moving rack slidably mounted on one side of the moving seat, a sealing door is fixedly mounted on the top of the moving rack, one side of the sealing door is adapted to one side of the heating wire, two groups of placement racks are arranged on the side of the sealing door close to the freeze drying cylinder, a number of placement plates are arranged on the two groups of placement racks, and the two groups of placement racks are arranged axially symmetrically.

[0011] Preferably, the condensation module includes a guide tube fixedly installed above the positioning ring, a lock is provided at the connection between the guide tube and the positioning ring for fixing, the guide tube is U-shaped, a condensation cylinder is provided at the other end of the guide tube, a condensation tube is provided inside the condensation cylinder, and a water outlet is provided at the bottom end of the condensation cylinder.

[0012] Preferably, an auxiliary block is also sleeved on one side of the bottom of the guide tube, a second return spring is fixedly connected to the top of the auxiliary block, a liquid receiving pool is fixedly connected to the top of the second return spring, the inner bottom surface of the liquid receiving pool is inclined, and a blocking plate is provided on one side of the liquid receiving pool.

[0013] Preferably, the gap extraction module includes a three-way joint arranged on one side of the bottom of the condensing cylinder, the connection between the three-way joint and the condensing cylinder is set as an air inlet end, the bottom end of the three-way joint is provided with an air outlet end, the top of the three-way joint is fixedly connected with an extraction cylinder, the interior of the extraction cylinder is provided with a piston rod, the extraction cylinder and the piston rod are used to extract the residual gas inside the condensing cylinder for release, and the air inlet end and the air outlet end of the three-way joint are both unidirectionally set.

[0014] Preferably, an extension plate is fixedly installed on one side of the top of the guide tube, a mounting plate is provided on one side of the extension plate, a fixing column is fixedly installed under the mounting plate, a first return spring is sleeved on the outer surface of the fixing column, one end of the first return spring is fixedly connected to the mounting plate, the other end of the first return spring is fixedly connected to a tension cylinder, the tension cylinder is fixedly connected to the piston rod, a first rotating shaft and a second rotating shaft are rotatably installed on one side of the extension plate, a first meshing gear and an incomplete gear are sleeved on one side of the first rotating shaft, the first meshing gear is located behind the incomplete gear, and the second rotating shaft is sleeved on one side of the first rotating shaft. A second meshing gear meshing with the first meshing gear is sleeved on one side, and a driving gear is sleeved on the other side of the second rotating shaft. A plurality of tooth grooves are opened on one side of the tension cylinder, and the plurality of tooth grooves are meshed with the teeth on the incomplete gear. The driving gear is arranged on the other side of the extension plate, and a driving plate is also slidably installed on the other side of the extension plate. A plurality of driving teeth are arranged on the top of the driving plate and meshed with the driving gear. The bottom of the driving plate is rotatably connected to the liquid receiving pool. The diameter of the first meshing gear is larger than the diameter of the second meshing gear, and the diameter of the incomplete gear is larger than the diameter of the first meshing gear.

[0015] Preferably, a telescopic rod is fixedly mounted on the bottom end of the driving plate, and a universal ball is provided at the connection between the telescopic end of the telescopic rod and the liquid receiving pool for rotational connection.

[0016] Preferably, the plasma generator further comprises a dynamic control module, which dynamically adjusts the heating power and condensation efficiency of the water sublimation and surface modification process based on a staged optimization algorithm to ensure the drying effect and material performance, specifically including:

[0017] Use temperature sensors to monitor the material surface temperature in real time, and use pressure sensors to monitor the vacuum degree and water vapor concentration in the cavity to ensure the stability of the sublimation and condensation processes. The temperature sensors and pressure sensors are installed in the heating area and condensation area of ​​the freeze-drying module respectively, which can measure material and gas parameters in real time;

[0018] The dynamic control algorithm includes input variables and output variables. The input variables include sublimation rate error, that is, the difference between the target sublimation rate and the actual sublimation rate, and the error change rate; the output variables include heating power adjustment amount and condensation temperature adjustment amount;

[0019] The calculation steps of the dynamic control algorithm are as follows:

[0020] Data acquisition and input: Compare the real-time data fed back by the temperature sensor and pressure sensor with the preset target parameters, and calculate the sublimation rate error and error change rate;

[0021] Model reasoning: Based on the sublimation kinetics model and combined with the current temperature and pressure conditions, the optimal heating power and condensation temperature adjustment are inferred;

[0022] Output control: The inferred adjustment amount is transmitted to the heating device and the condensing device to dynamically adjust the power and temperature to ensure the stability of the sublimation rate of the system.

[0023] The present invention also discloses a freeze-drying process for the production of ethylene-propylene insulating materials, which is applied to the freeze-drying device for the production of ethylene-propylene insulating materials, and comprises the following steps:

[0024] S1: Cool the EPDM insulation material to -40°C and put it into the freeze drying cylinder, close the seal 7 and start the vacuum pump to reduce the pressure in the cylinder to 0.1Pa;

[0025] S2: The heating wire in the freeze drying cylinder slowly heats up to -10℃ to 0℃, causing solid water to sublime into gas; the plasma generator produces high-energy particles to accelerate sublimation and prevent the formation of a frozen layer on the surface;

[0026] S3: The water vapor generated by sublimation enters the condenser through the guide tube connected to the positioning ring. The condenser cools the water vapor into liquid water, and flows into the liquid receiving pool through the water outlet. As the weight of the liquid increases, the liquid receiving pool moves downward and drives the driving plate to slide, and drives the piston rod in the extraction cylinder through the gear transmission to complete the pumping action and discharge the residual gas in the condenser.

[0027] S4: The liquid receiving pool is exhausted in two states: one is that the partial reset drives the gear linkage to complete partial gas discharge; the other is that the liquid receiving pool deflects to the bottom and triggers the tension cylinder to reset, instantly exhausting the gas, and the second reset spring restores the liquid receiving pool to the initial position to complete the exhaust cycle;

[0028] S5: After drying is completed, the plasma generator continues to operate to modify the surface of the EPDM insulation material to generate a functional molecular layer that is resistant to aging and voltage;

[0029] S6: The operator monitors the entire process in real time through the observation window. After drying and modification are completed, the equipment is turned off and the processed EPDM insulation material is taken out.

[0030] Beneficial effects of the present invention:

[0031] 1. The freeze-drying device and process for the production of ethylene-propylene insulating materials are provided with a condensation component. Through the configuration of the guide pipe and the condensation cylinder, the water vapor is effectively guided and quickly cooled into liquid water through the condensation tube, ensuring high condensation efficiency. The liquid water flows into the liquid receiving tank. The bottom of the liquid receiving tank is inclined to ensure that the condensed liquid flows smoothly to the outlet next to the barrier plate, avoiding liquid retention and ensuring a smooth discharge process. As the condensed water gradually increases, the weight of the liquid receiving tank increases, driving the drive plate connected to it to slide downward, and effectively driving the exhaust device through the gear transmission system to extract the residual gas in the condensation cylinder, thereby preventing the condensation efficiency from decreasing. The two exhaust modes enhance the adaptability of the system: when the liquid receiving tank is partially reset, the continuity of the exhaust action can still be maintained; and when the liquid receiving tank is completely moved down and deflected, the gas is quickly discharged through the unlocking mechanism of the incomplete gear and the system is restored to its initial state through the reset spring. Through this series of optimizations, the condensation component can automatically discharge the condensed liquid and efficiently clean the gas in the condensation cylinder, ensuring the system stability and repeatability in continuous operation, avoiding energy waste and equipment loss, and improving the overall production efficiency and equipment reliability.

[0032] 2. This freeze-drying device and process for the production of EPDM insulating materials is provided with a telescopic rod and a universal ball to cooperate with a liquid receiving pool sheet. The telescopic rod is connected by the rotation of the universal ball, and can automatically adapt to the angle change of the liquid receiving pool when the liquid receiving pool moves downward and deflects. Since the universal ball can rotate freely, it allows the deflection of the liquid receiving pool to not affect the movement of the telescopic rod, thereby avoiding interference in the meshing state between the drive plate and the drive teeth and the drive gear, so that the drive system can still maintain precise control and stability when the liquid gravity changes and the liquid receiving pool deflects.

[0033] 3. The freeze-drying device and process for the production of EPDM insulation materials are provided with a plasma generator. The plasma generator accelerates the sublimation of moisture in the EPDM insulation material during the drying process through the high-energy particles generated by the plasma generator, ensuring that solid moisture is quickly converted into gas, thereby improving the drying efficiency and preventing the accumulation of a frozen layer on the surface. After the drying is completed, the plasma generator continues to operate to modify the surface of the material, and the generated active particles (such as O, OH or CFx) form a functional molecular layer that is resistant to aging and voltage on the surface of the material, significantly improving the long-term stability and insulation performance of the material. In addition, the plasma generator cooperates with a dynamic control module to dynamically adjust the heating power and condensation temperature according to real-time sensor data to ensure a smooth water sublimation process, avoid drying too fast or too slow, and further improve product quality and process control accuracy. This precise dynamic adjustment not only optimizes the moisture removal process, but also enhances the surface modification effect, ensuring the stability and reliability of material performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0036] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle;

[0037] Figure 3 This is a schematic diagram of the exploded structure of the freeze drying cylinder of the present invention;

[0038] Figure 4 This is a schematic structural diagram of the condensation component of the present invention from a first viewing angle;

[0039] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0040] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0041] Figure 7 This is a schematic structural diagram of the condensing component of the present invention from a second viewing angle;

[0042] Figure 8 For the present invention Figure 7 The enlarged structural diagram at C in the middle;

[0043] Fig. 9 It is a schematic diagram of the local structure of the gap extraction module of the present invention;

[0044] Fig.10 It is a schematic diagram of the internal structure of the condensing cylinder of the present invention.

[0045] The markings in the figure are:

[0046] 1. Moving seat; 2. Positioning plate; 3. Positioning ring; 4. Freeze drying cylinder; 5. Observation window; 6. Moving rack; 7. Sealing door; 8. Placement rack; 9. Heating wire; 10. Plasma generator; 11. Guide tube; 12. Lock; 13. Condensation cylinder; 14. Water outlet; 15. Three-way joint; 16. Condensation tube; 17. Extension plate; 18. Mounting plate; 19. Fixed column; 20. First return spring; 21. Tension cylinder; 22. Extraction cylinder; 23. Piston rod; 24. Air outlet; 25. Tooth groove; 26. First rotating shaft; 27. Second rotating shaft; 28. First meshing gear; 29. ​​Second meshing gear; 30. Drive gear; 31. Incomplete gear; 32. Auxiliary block; 33. Liquid receiving pool; 34. Second return spring; 35. Drive plate; 36. Drive tooth; 37. Telescopic rod; 38. Universal ball; 39. Blocking plate; 40. Vacuum pump. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0048] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] like Figures 1 to 10As shown, a freeze drying device and process for producing EPDM insulation material include: a moving seat 1, a plurality of walking wheels are arranged at the bottom end of the moving seat 1, a plurality of positioning plates 2 are arranged at the top end of the moving seat 1, and a circular positioning ring 3 is arranged on the top of the plurality of positioning plates 2; a drying component, the drying component is arranged between the plurality of positioning rings 3, the drying component includes a freeze drying cylinder 4 fixedly installed between the plurality of positioning rings 3 and a placement module movably installed inside the freeze drying cylinder 4, the placement module is used to place the EPDM insulation material, and the freeze drying cylinder 4 is used to dry the EPDM insulation material placed on the placement module; a plasma generator 10, the plasma generator 10 is arranged at one end of the freeze drying cylinder 4, and the plasma generator 10 is used to dry the EPDM insulation material It is used to accelerate sublimation during drying treatment, and to modify the surface of ethylene-propylene insulating material after drying treatment; a plurality of condensation components, which are respectively arranged at the upper ends of a plurality of positioning rings 3, and a plurality of condensation components are arranged through the positioning rings 3 and the freeze drying cylinder 4, and the condensation components include a condensation module and a gap extraction module, the condensation module is used to condense and collect the gas generated during drying, and the gap extraction module is used to perform gap removal of the gas remaining in the condensation module, wherein a plurality of heating wires 9 are arranged at the inner bottom end of the freeze drying cylinder 4, and the heating wires 9 are used to heat and heat the inside of the freeze drying cylinder 4, and a plurality of observation windows 5 are arranged on the outer surface of the freeze drying cylinder 4, and a plurality of observation windows 5 are arranged transparently, and a vacuum pump 40 is also arranged on one side of the freeze drying cylinder 4;

[0050] First, the EPDM insulation material is quickly cooled to -40°C or below to ensure that the water is frozen into a solid state, and then placed in the freeze drying cylinder 4. Subsequently, the vacuum pump 40 is started to reduce the pressure in the freeze drying cylinder 4 to about 0.1Pa. At this time, the heating wire 9 in the drying cylinder starts to heat slowly, raising the temperature of the material surface to -10°C to 0°C, so that the solid water sublimates into a gaseous state. At the same time, the plasma generator 10 starts to work, generating high-energy particles to accelerate the sublimation process and prevent the accumulation of a frozen layer on the surface. The water vapor generated by sublimation is diffused into several condensation components through the airflow in the freeze drying cylinder 4 and is cooled under the action of the condensation module. To liquid water and collect it, the gap extraction module regularly removes the residual gas in the condensation module to prevent the condensation efficiency from decreasing. After the drying is completed, the plasma generator 10 continues to operate to modify the surface of the material, and generates an aging-resistant and voltage-resistant functional molecular layer on the surface of the material through active particles (such as O, OH or CFx). The whole process is monitored in real time by the observation window 5. The operator can adjust the heating power, condensation temperature and plasma intensity according to the progress of drying and modification to ensure that the drying and surface modification of the EPDM insulation material reach the optimal state. After the drying and surface modification are completed, the equipment is turned off and the processed EPDM insulation material is taken out.

[0051] like Figure 2 , Figure 3As shown, the placement module includes a moving frame 6 slidably mounted on one side of the moving seat 1, a sealing door 7 is fixedly mounted on the top of the moving frame 6, one side of the sealing door 7 is adapted to one side of the heating wire 9, and two groups of placement frames 8 are arranged on the side of the sealing door 7 close to the freeze drying cylinder 4, and a plurality of placement plates are arranged on the two groups of placement frames 8, and the two groups of placement frames 8 are arranged axially symmetrically;

[0052] At the beginning of the operation, the mobile rack 6 moves from one side of the mobile base 1 to the entrance position of the freeze drying cylinder 4 through the sliding track, the sealed door 7 on the top is opened, and two sets of axially symmetrical placement racks 8 are exposed. The operator places the EPDM insulation material one by one on several placement plates of the placement rack 8 according to the specifications and quantity to ensure that the material is evenly distributed and stable to avoid sliding or tilting in the subsequent drying process. After the material placement is completed.

[0053] like Figures 4 to 10As shown, the condensation module includes a guide tube 11 fixedly installed above the positioning ring 3, a lock buckle 12 is provided at the connection between the guide tube 11 and the positioning ring 3 for fixing, the guide tube 11 is U-shaped, a condensation cylinder 13 is provided at the other end of the guide tube 11, a condensation tube 16 is provided inside the condensation cylinder 13, a water outlet 14 is provided at the bottom end of the condensation cylinder 13, an auxiliary block 32 is also sleeved on one side of the bottom of the guide tube 11, a second return spring 34 is fixedly connected above the auxiliary block 32, a liquid receiving pool 33 is fixedly connected to the top of the second return spring 34, the bottom surface of the liquid receiving pool 33 is inclined, and one side of the liquid receiving pool 33 is provided with The barrier plate 39, the gap extraction module includes a three-way joint 15 arranged on one side of the bottom of the condensation cylinder 13, the connection between the three-way joint 15 and the condensation cylinder 13 is set as the air inlet end, the bottom end of the three-way joint 15 is provided with an air outlet end 24, the top of the three-way joint 15 is fixedly connected with an extraction cylinder 22, the interior of the extraction cylinder 22 is provided with a piston rod 23, the extraction cylinder 22 and the piston rod 23 are used to extract the residual gas inside the condensation cylinder 13 for release, the air inlet end and the air outlet end 24 of the three-way joint 15 are both unidirectionally arranged, an extension plate 17 is fixedly installed on one side of the top of the guide pipe 11, and a mounting plate 18 is provided on one side of the extension plate 17, and the mounting plate A fixing column 19 is fixedly installed below 18, and a first return spring 20 is sleeved on the outer surface of the fixing column 19. One end of the first return spring 20 is fixedly connected to the mounting plate 18, and the other end of the first return spring 20 is fixedly connected to a tension cylinder 21, and the tension cylinder 21 is fixedly connected to the piston rod 23. A first rotating shaft 26 and a second rotating shaft 27 are rotatably installed on one side of the extension plate 17, and a first meshing gear 28 and an incomplete gear 31 are sleeved on one side of the first rotating shaft 26. The first meshing gear 28 is located behind the incomplete gear 31, and a first meshing gear 28 is sleeved on one side of the second rotating shaft 27. A second meshing gear 29, a driving gear 30 is sleeved on the other side of the second rotating shaft 27, a plurality of tooth grooves 25 are provided on one side of the tension cylinder 21, and the plurality of tooth grooves 25 mesh with the teeth on the incomplete gear 31, the driving gear 30 is arranged on the other side of the extension plate 17, and a driving plate 35 is also slidably mounted on the other side of the extension plate 17, a plurality of driving teeth 36 are provided on the top of the driving plate 35 to mesh with the driving gear 30, and the bottom of the driving plate 35 is rotatably connected to the liquid receiving tank 33, the diameter of the first meshing gear 28 is larger than the diameter of the second meshing gear 29, and the diameter of the incomplete gear 31 is larger than the diameter of the first meshing gear 28;

[0054] The water vapor generated in the freeze drying cylinder 4 enters the condensing cylinder 13 through the guide tube 11 connected to the positioning ring 3. The condensing tube 16 in the condensing cylinder 13 quickly cools the water vapor into liquid water. The liquid water flows into the liquid receiving tank 33 through the water outlet 14 at the bottom of the condensing cylinder 13. The bottom of the liquid receiving tank 33 is inclined so that the liquid can flow smoothly to the outlet next to the blocking plate 39. As the condensed water gradually increases, the liquid receiving tank 33 moves downward due to the increase in weight, and drives the driving plate 35 connected thereto to slide downward, and the sliding driving gear 30 of the driving plate 35 rotates. The gear further drives the meshed second meshing gear 29 to rotate, and the second meshing gear 29 synchronously drives the first meshing gear 28 to rotate. At the same time, the first meshing gear 28 drives the incomplete gear 31 meshed with it to start rotating. When the incomplete gear 31 rotates to the tooth groove 25 and meshes with the tension cylinder 21, the tension cylinder 21 starts to move upward, driving the piston rod 23 to form an upward pumping action inside the extraction cylinder 22, and the residual gas in the condensation cylinder 13 is extracted. During the pumping process, two situations will occur according to the state of the liquid receiving pool 33:

[0055] First, if the liquid receiving pool 33 partially resets under the drive of water weight, that is, moves downward within a certain range and then slightly rises, the reverse movement of the driving plate 35 will continue to complete partial air extraction through the gear linkage mechanism, and at the same time, the extracted gas is discharged from the gas outlet 24 at the top of the extraction cylinder 22;

[0056] Second, when the liquid receiving pool 33 continues to move downward to the bottom and deflects due to gravity, the driving gear 30 system takes the incomplete gear 31 away from the tooth groove 25 of the tension cylinder 21, causing the tension cylinder 21 to lose its locking force. At this time, the tension cylinder 21 quickly returns downward under the action of the first return spring 20, and the downward movement of the piston rod 23 forms an instantaneous exhaust action, which quickly discharges the extracted gas out of the condensation system. At the same time, the deflected liquid receiving pool 33 completes the partial condensation liquid discharge action, gradually rises under the action of the second return spring 34, restores the initial position, and resets the incomplete gear 31 through linkage, completing a vacuum cycle;

[0057] Through this mechanical linkage mechanism driven by the weight of the liquid, efficient cleaning of the gas in the condensation cylinder 13 and automatic discharge of the condensed liquid are achieved, and stability and repeatability in continuous operation are ensured;

[0058] A telescopic rod 37 is fixedly mounted on the bottom end of the driving plate 35, and a universal ball 38 is provided at the connection between the telescopic end of the telescopic rod 37 and the liquid receiving tank 33 for rotational connection;

[0059] When the liquid receiving pool 33 moves downward and deflects, the telescopic rod 37 is driven to extend and retract, and the adjustment angle is changed by the universal ball 38 , which will not affect the meshing state between the driving teeth 36 on the driving plate 35 and the driving gear 30 .

[0060] The plasma generator 10 also includes a dynamic control module, which dynamically adjusts the heating power and condensation efficiency of the water sublimation and surface modification process based on a staged optimization algorithm to ensure the drying effect and material performance, specifically including:

[0061] Use temperature sensors to monitor the material surface temperature in real time, and use pressure sensors to monitor the vacuum degree and water vapor concentration in the cavity to ensure the stability of the sublimation and condensation processes. The temperature sensors and pressure sensors are installed in the heating area and condensation area of ​​the freeze-drying module respectively, which can measure material and gas parameters in real time;

[0062] The dynamic control algorithm includes input variables and output variables. The input variables include sublimation rate error, that is, the difference between the target sublimation rate and the actual sublimation rate, and the error change rate; the output variables include heating power adjustment amount and condensation temperature adjustment amount;

[0063] The calculation steps of the dynamic control algorithm are as follows:

[0064] Data acquisition and input: Compare the real-time data fed back by the temperature sensor and pressure sensor with the preset target parameters, and calculate the sublimation rate error and error change rate;

[0065] Model reasoning: Based on the sublimation kinetics model and combined with the current temperature and pressure conditions, the optimal heating power and condensation temperature adjustment are inferred;

[0066] Output control: The inferred adjustment amount is transmitted to the heating device and the condensing device, and the power and temperature are adjusted dynamically to ensure the stability of the sublimation rate of the system;

[0067] The dynamic control algorithm is based on the sublimation kinetics and thermodynamics model, and optimizes the sublimation and surface modification process through feedback regulation. The specific dynamic control algorithm is as follows:

[0068] 1. Data collection and input

[0069] The following data are collected in real time through sensors: Temperature data: Material surface temperature T S and condenser temperature T c ;

[0070] Pressure data: actual vacuum degree P and water vapor concentration [H2O] in the chamber;

[0071] The target sublimation rate calculation formula is:

[0072]

[0073] Where E a is the activation energy of water sublimation, K B is the Boltzmann constant, T S is the surface temperature.

[0074] Next, the actual sublimation rate is derived from the sensor data:

[0075]

[0076] 2. Model Reasoning

[0077] The dynamic control algorithm calculates the error and the rate of change of error:

[0078] e=R target -R actual , Δe=ee previous

[0079] According to the inference rules, determine the heating power adjustment ΔP heat , and condensing temperature adjustment ΔP cond :

[0080] ΔP heat =K1·e+K2·Δe

[0081] ΔP cond =K3·e+K4·Δe

[0082] Among them, K1, K2, K3, and K4 are control gain coefficients, which are optimized according to experimental data.

[0083] 3. Output control

[0084] The adjustment amount is transmitted to the heating device and the condenser. The heating device is adjusted according to ΔP heat Dynamically adjust the power to keep the surface temperature stable. The condenser cond Adjust the condensation temperature to ensure the efficiency of water vapor liquefaction;

[0085] Through dynamic adjustment, we can avoid uneven drying of materials due to sublimation that is too fast or too slow, reduce the problem of uncondensed gas escape, and protect the stable operation of the system. In the surface modification stage, the surface temperature and active particle concentration are dynamically controlled to achieve a uniform modification depth.

[0086] The present invention also discloses a freeze-drying process for the production of ethylene-propylene insulating materials, which is applied to the freeze-drying device for the production of ethylene-propylene insulating materials, and comprises the following steps:

[0087] S1: Cool the EPDM insulation material to -40°C and put it into the freeze drying cylinder 4, close the seal 7 and start the vacuum pump 40 to reduce the pressure in the cylinder to 0.1 Pa;

[0088] S2: The heating wire 9 in the freeze drying cylinder 4 is slowly heated to -10°C to 0°C, causing the solid water to sublime into gas; the plasma generator 10 generates high-energy particles to accelerate sublimation and prevent the formation of a frozen layer on the surface;

[0089] S3: The water vapor generated by sublimation enters the condensation cylinder 13 through the guide tube 11 connected to the positioning ring 3, and the condensation tube 16 cools the water vapor into liquid water, and flows into the liquid receiving pool 33 through the water outlet 14; as the weight of the liquid increases, the liquid receiving pool 33 moves downward and drives the driving plate 35 to slide, and drives the piston rod 23 in the extraction cylinder 22 through the gear transmission to complete the pumping action and discharge the residual gas in the condensation cylinder 13;

[0090] S4: the liquid receiving pool 33 is exhausted in two states: one is that the partial reset drives the gear linkage to complete partial gas discharge; the other is that the liquid receiving pool 33 deflects to the bottom and triggers the tension cylinder 21 to reset, instantly exhaust the gas, and restores the liquid receiving pool 33 to the initial position through the second reset spring 34 to complete the exhaust cycle;

[0091] S5: After the drying is completed, the plasma generator 10 continues to operate to modify the surface of the EPDM insulation material to generate a functional molecular layer that is resistant to aging and voltage;

[0092] S6: The operator monitors the whole process in real time through the observation window 5. After the drying and modification are completed, the equipment is turned off and the processed EPDM insulation material is taken out;

[0093] By combining freeze drying with plasma modification, drying and surface treatment are completed in the same device, which greatly improves production efficiency; -40°C rapid freezing and vacuum sublimation technology are adopted to ensure that the internal structure of EPDM insulation material is not damaged by liquid water, thereby improving material quality; the plasma generator 10 plays a role in both the sublimation and modification stages, accelerating drying while generating functional molecular layers that are resistant to aging and voltage, thereby achieving performance optimization; the mechanical linkage structure driven by the weight of the liquid receiving tank 33 can complete condensed water discharge and residual gas extraction without an additional power source, thereby reducing energy consumption; the observation window 5 monitors the entire process in real time, facilitating adjustment of drying and modification parameters, ensuring production stability and consistency, and the overall design is efficient, environmentally friendly and reliable.

[0094] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0095] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A freeze drying device for the production of ethylene propylene insulation material, characterized in that: include: A moving seat (1), wherein a plurality of running wheels are arranged at the bottom end of the moving seat (1), a plurality of positioning plates (2) are arranged at the top end of the moving seat (1), and a circular positioning ring (3) is arranged at the top of each of the plurality of positioning plates (2); A drying component, the drying component is arranged between the plurality of positioning rings (3), the drying component comprises a freeze drying cylinder (4) fixedly mounted between the plurality of positioning rings (3) and a placement module movably mounted inside the freeze drying cylinder (4), the placement module being used to place ethylene-propylene insulating material, and the freeze drying cylinder (4) being used to dry the ethylene-propylene insulating material placed on the placement module; A plasma generator (10), the plasma generator (10) being arranged at one end of the freeze drying cylinder (4), the plasma generator (10) being used to accelerate sublimation when drying the ethylene-propylene insulating material, and to perform surface modification treatment on the ethylene-propylene insulating material after drying; A plurality of condensation components are respectively arranged at the upper ends of the plurality of positioning rings (3), and the plurality of condensation components are arranged through the positioning rings (3) and the freeze drying cylinder (4), the condensation components include a condensation module and a gap extraction module, the condensation module is used for condensing and collecting the gas generated during the drying, and the gap extraction module is used for gap removal of the gas remaining in the condensation module.

2. The freeze drying device for producing EPDM insulation material according to claim 1, characterized in that: A plurality of heating wires (9) are arranged at the bottom end of the freeze drying cylinder (4), and the heating wires (9) are used to heat the inside of the freeze drying cylinder (4). A plurality of observation windows (5) are arranged on the outer surface of the freeze drying cylinder (4), and the plurality of observation windows (5) are transparent. A vacuum pump (40) is also arranged on one side of the freeze drying cylinder (4).

3. The freeze drying device for producing EPDM insulation material according to claim 2, characterized in that: The placement module comprises a moving frame (6) slidably mounted on one side of the moving seat (1); a sealing door (7) is fixedly mounted on the top of the moving frame (6); one side of the sealing door (7) is matched with one side of the heating wire (9); two groups of placement frames (8) are arranged on the side of the sealing door (7) close to the freeze drying cylinder (4); a plurality of placement plates are arranged on the two groups of placement frames (8); and the two groups of placement frames (8) are arranged axially symmetrically.

4. The freeze drying device for producing EPDM insulation material according to claim 1, characterized in that: The condensation module comprises a guide tube (11) fixedly mounted above the positioning ring (3); a lock buckle (12) is provided at the connection between the guide tube (11) and the positioning ring (3) for fixing; the guide tube (11) is arranged in a U shape; a condensation cylinder (13) is provided at the other end of the guide tube (11); a condensation tube (16) is provided inside the condensation cylinder (13); and a water outlet (14) is provided at the bottom end of the condensation cylinder (13).

5. The freeze drying device for producing EPDM insulation material according to claim 4, characterized in that: An auxiliary block (32) is also sleeved on one side of the bottom of the guide tube (11); a second return spring (34) is fixedly connected to the top of the auxiliary block (32); a liquid receiving pool (33) is fixedly connected to the top of the second return spring (34); the bottom surface of the liquid receiving pool (33) is inclined; and a baffle plate (39) is provided on one side of the liquid receiving pool (33).

6. The freeze drying device for producing EPDM insulation material according to claim 5, characterized in that: The gap extraction module comprises a three-way joint (15) arranged on one side of the bottom of the condensing cylinder (13); the connection between the three-way joint (15) and the condensing cylinder (13) is arranged as an air inlet end; the bottom end of the three-way joint (15) is arranged with an air outlet end (24); the top end of the three-way joint (15) is fixedly connected with an extraction cylinder (22); a piston rod (23) is arranged inside the extraction cylinder (22); the extraction cylinder (22) and the piston rod (23) are used to extract the residual gas inside the condensing cylinder (13) for release; the air inlet end and the air outlet end (24) of the three-way joint (15) are both unidirectionally arranged.

7. The freeze drying device for producing EPDM insulation material according to claim 6, characterized in that: An extension plate (17) is fixedly installed on one side of the top of the guide tube (11), a mounting plate (18) is provided on one side of the extension plate (17), a fixing column (19) is fixedly installed below the mounting plate (18), a first return spring (20) is sleeved on the outer surface of the fixing column (19), one end of the first return spring (20) is fixedly connected to the mounting plate (18), the other end of the first return spring (20) is fixedly connected to a tension cylinder (21), the tension cylinder (21) is fixedly connected to the piston rod (23), a first rotating shaft (26) and a second rotating shaft (27) are rotatably installed on one side of the extension plate (17), a first meshing gear (28) and an incomplete gear (31) are sleeved on one side of the first rotating shaft (26), the first meshing gear (28) is located behind the incomplete gear (31), and the second rotating shaft (27) is located behind the incomplete gear (31). ) is sleeved on one side with a second meshing gear (29) meshing with the first meshing gear (28), and the other side of the second rotating shaft (27) is sleeved with a driving gear (30). A plurality of tooth grooves (25) are provided on one side of the tension cylinder (21), and the plurality of tooth grooves (25) mesh with the teeth on the incomplete gear (31). The driving gear (30) is arranged on the other side of the extension plate (17), and a driving plate (35) is also slidably mounted on the other side of the extension plate (17). A plurality of driving teeth (36) are provided on the top of the driving plate (35) and mesh with the driving gear (30). The bottom of the driving plate (35) is rotatably connected to the liquid receiving tank (33). The diameter of the first meshing gear (28) is greater than the diameter of the second meshing gear (29), and the diameter of the incomplete gear (31) is greater than the diameter of the first meshing gear (28).

8. The freeze drying device for producing EPDM insulation material according to claim 7, characterized in that: A telescopic rod (37) is fixedly mounted on the bottom end of the driving plate (35), and a universal ball (38) is provided at the connection between the telescopic end of the telescopic rod (37) and the liquid receiving pool (33) for rotational connection.

9. The freeze drying device for producing EPDM insulation material according to claim 1, characterized in that: The plasma generator (10) further comprises a dynamic control module, which dynamically adjusts the heating power and condensation efficiency of the water sublimation and surface modification process based on a phased optimization algorithm to ensure the drying effect and material performance, specifically comprising: Use temperature sensors to monitor the material surface temperature in real time, and use pressure sensors to monitor the vacuum degree and water vapor concentration in the cavity to ensure the stability of the sublimation and condensation processes. The temperature sensors and pressure sensors are installed in the heating area and condensation area of ​​the freeze-drying module respectively, which can measure material and gas parameters in real time; The dynamic control algorithm includes input variables and output variables. The input variables include sublimation rate error, that is, the difference between the target sublimation rate and the actual sublimation rate, and the error change rate; the output variables include heating power adjustment amount and condensation temperature adjustment amount; The calculation steps of the dynamic control algorithm are as follows: Data acquisition and input: Compare the real-time data fed back by the temperature sensor and pressure sensor with the preset target parameters, and calculate the sublimation rate error and error change rate; Model reasoning: Based on the sublimation kinetics model and combined with the current temperature and pressure conditions, the optimal heating power and condensation temperature adjustment are inferred; Output control: The inferred adjustment amount is transmitted to the heating device and the condensing device to dynamically adjust the power and temperature to ensure the stability of the sublimation rate of the system.

10. A freeze drying process for the production of ethylene propylene insulation material, applied to a freeze drying device for the production of ethylene propylene insulation material as described in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Cool the ethylene-propylene insulating material to -40°C and place it in a freeze drying cylinder (4), close the seal 7 and start the vacuum pump (40) to reduce the pressure in the cylinder to 0.1 Pa; S2: The heating wire (9) in the freeze drying cylinder (4) is slowly heated to -10°C to 0°C, causing solid water to sublime into gas; the plasma generator (10) generates high-energy particles to accelerate sublimation and prevent the formation of a frozen layer on the surface; S3: The water vapor generated by sublimation enters the condensation cylinder (13) through the guide tube (11) connected to the positioning ring (3), and the condensation tube (16) cools the water vapor into liquid water, and flows into the liquid receiving pool (33) through the water outlet (14); as the weight of the liquid increases, the liquid receiving pool (33) moves downward and drives the driving plate (35) to slide, and drives the piston rod (23) in the extraction cylinder (22) through the gear transmission to complete the air extraction action, thereby discharging the residual gas in the condensation cylinder (13); S4: the liquid receiving pool (33) is exhausted in two states: one is that the partial resetting drives the gear linkage to complete the partial gas discharge; the other is that the liquid receiving pool (33) deflects to the bottom and triggers the tension cylinder (21) to reset, instantly exhausts the gas, and restores the liquid receiving pool (33) to the initial position through the second resetting spring (34), completing the exhaust cycle; S5: After drying is completed, the plasma generator (10) continues to operate to modify the surface of the EPDM insulation material to generate a functional molecular layer that is resistant to aging and voltage; S6: The operator monitors the entire process in real time through the observation window (5). After the drying and modification are completed, the equipment is turned off and the processed EPDM insulation material is taken out.

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