An apparatus for uniform irradiation of crosslinked jacketing material

Abstract

The application relates to the technical field of high polymer material processing, and discloses a uniform irradiation treatment device for irradiation crosslinking sheath material; the device adopts modular design and comprises a material pretreatment dispersion module, a layered progressive irradiation treatment module, a multi-dimensional dose real-time monitoring module, a closed-loop control module and an energy recovery module; the material pretreatment dispersion module uniformly disperses sheath material particles into thin layers to avoid accumulation; the layered progressive irradiation treatment module irradiates the material layer by layer through multiple groups of electron accelerators arranged in an up-and-down staggered mode; the multi-dimensional dose real-time monitoring module simultaneously detects the irradiation dose of the surface and the interior of the material; the closed-loop control module adjusts the output power of each accelerator and the material conveying speed in real time according to the detection result; and the energy recovery module recovers the electron beam energy that is not absorbed; the application solves the problems of uneven irradiation dose, insufficient internal irradiation and large product performance difference, improves the uniformity and efficiency of irradiation crosslinking, and reduces energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of polymer material processing technology, specifically a uniform irradiation treatment device for irradiated crosslinking sheath materials. Background Technology

[0002] Irradiation crosslinking is a processing method that uses high-energy rays (such as electron beams and gamma rays) to irradiate polymer materials, causing covalent bonds to form between polymer chains, thereby improving the mechanical properties, heat resistance, chemical corrosion resistance, and aging resistance of the materials. Irradiation crosslinked sheathing materials are widely used in fields such as wires and cables, optical cables, and automotive wiring harnesses. The uniformity of its crosslinking degree directly affects the quality and service life of the products.

[0003] In existing technologies, the processing equipment for irradiated cross-linked sheathing materials mainly uses a single electron accelerator to irradiate the accumulated material. This method has the following obvious drawbacks:

[0004] 1. Uneven irradiation dose: Due to the accumulation of materials, the surface materials receive a much higher irradiation dose than the internal materials, resulting in large differences in the degree of crosslinking of the products. The crosslinking degree deviation is usually more than ±10%, which seriously affects the consistency of product performance.

[0005] Insufficient internal irradiation: The electron beam has limited penetration ability. For material layers with a thickness of more than 5 mm, the internal material cannot receive a sufficient irradiation dose, resulting in incomplete cross-linking and making the product prone to cracking, aging and other problems.

[0006] 2. Low irradiation efficiency: In order to achieve the required degree of cross-linking of internal materials, it is necessary to extend the irradiation time or increase the accelerator power, which not only reduces production efficiency but also increases energy consumption.

[0007] 3. Lack of real-time monitoring and closed-loop control: Most existing devices can only sample and test the product after irradiation is completed. They cannot monitor the dose distribution during the irradiation process in real time, nor can they adjust the process parameters in a timely manner according to the actual situation, resulting in unstable product quality.

[0008] 4. Low energy utilization: Only about 30%-40% of the electron beam emitted by the electron accelerator is absorbed by the material, and most of the remaining electron beam energy is wasted, resulting in a large amount of energy consumption.

[0009] Although some improved technical solutions exist, such as using double-sided irradiation and increasing the number of irradiations, these solutions still do not fundamentally solve the problems of insufficient internal irradiation and uneven dosage caused by material accumulation. Moreover, the equipment has a complex structure, occupies a large area, and has high maintenance costs. Therefore, there is an urgent need to develop a new type of irradiation treatment device that can achieve uniform irradiation, improve irradiation efficiency, and reduce energy consumption. Summary of the Invention

[0010] The purpose of this invention is to overcome the above-mentioned defects of the prior art and provide a uniform irradiation treatment device for irradiated crosslinked sheathing materials. The device adopts a modular design, in which the sheathing material particles are uniformly dispersed into a thin layer through a material pretreatment and dispersion module, and then the material is irradiated layer by layer through a layered progressive irradiation treatment module. At the same time, combined with multi-dimensional dose real-time monitoring and closed-loop control, the precise control and uniform distribution of irradiation dose are achieved, which significantly improves product quality and production efficiency.

[0011] To achieve the above objectives, the present invention adopts the following technical solution: a uniform irradiation treatment device for irradiating crosslinked sheath materials, comprising a material pretreatment dispersion module, a layered progressive irradiation treatment module and a finished product collection module connected in sequence, and further comprising a multi-dimensional dose real-time monitoring module, a closed-loop control module and an energy recovery module.

[0012] The material pretreatment dispersion module is used to uniformly disperse the sheathing material particles into a continuous thin layer of material to avoid material accumulation. It includes a hopper, a vibrating feeder, a multi-stage dispersion roller group, and a thickness detection sensor. The multi-stage dispersion roller group consists of at least three sets of dispersion rollers arranged alternately, each set of dispersion rollers has a spiral guide groove on its surface, and adjacent dispersion rollers rotate in opposite directions, which can gradually disperse and evenly spread the material. The thickness detection sensor is set at the outlet of the multi-stage dispersion roller group to detect the thickness of the material layer in real time.

[0013] The layered progressive irradiation treatment module is used to perform layer-by-layer irradiation crosslinking treatment on thin-layer materials. It includes at least three irradiation treatment units arranged vertically. Each irradiation treatment unit includes a horizontal conveyor belt, an electron accelerator, and a beam scanner. The horizontal conveyor belts of adjacent irradiation treatment units have opposite conveying directions, and the discharge end of the upper unit is connected to the feed end of the lower unit through an arc-shaped guide plate, so that the material is automatically flipped during the conveying process. The electron accelerators are respectively set above and below each horizontal conveyor belt, forming an irradiation structure that irradiates both the upper and lower surfaces of the material simultaneously.

[0014] The multi-dimensional dose real-time monitoring module is used to simultaneously detect the actual irradiation dose on the surface and inside of the material. It includes a surface dose detection unit and an internal dose detection unit. The surface dose detection unit includes multiple thin-film dosimeter arrays uniformly arranged above and below each horizontal conveyor belt to detect the irradiation dose distribution on the surface of the material. The internal dose detection unit includes at least two sets of insertable dose sensors, which are respectively set inside the material layer between two adjacent irradiation processing units to detect the irradiation dose inside the material.

[0015] The closed-loop control module is electrically connected to the material pretreatment dispersion module, the layered progressive irradiation treatment module, and the multi-dimensional dose real-time monitoring module, respectively. It is used to adjust the operating parameters of each module in real time according to the detected actual irradiation dose. It includes a data acquisition unit, a central processing unit, and an execution unit. The central processing unit has a built-in irradiation dose-crosslinking degree correspondence model and an adaptive PID control algorithm. It can adjust the feeding speed of the vibrating feeder, the rotation speed of the multi-stage dispersion roller group, the output power of each electron accelerator, and the conveying speed of each horizontal conveyor belt in real time according to the detection results of material thickness, surface dose, and internal dose.

[0016] The energy recovery module is connected to the layered progressive irradiation processing module and is used to recover electron beam energy that has not been absorbed by the material. It includes an electron collecting plate, an energy converter, and an energy storage battery located opposite each electron accelerator. The electron collecting plate is used to collect electrons that have not been absorbed by the material, the energy converter converts the kinetic energy of the electrons into electrical energy, and the energy storage battery is used to store the converted electrical energy and power the auxiliary equipment of the device.

[0017] Furthermore, each electron accelerator is connected to a beam scanner at its output end. The scanning width of the beam scanner matches the width of the horizontal conveyor belt, and the scanning frequency is 50-200Hz, which enables the electron beam to scan the material surface uniformly. The accelerating voltage of the electron accelerator is 0.5-3MeV, the beam power is 10-100kW, and the output power of each electron accelerator can be adjusted independently to meet the irradiation requirements of sheath materials with different thicknesses and formulations.

[0018] Furthermore, the insertion-type dose sensor uses a high-temperature and radiation-resistant diamond dosimeter. Its detection end is flat and no more than 0.5 mm thick, allowing it to be inserted into the material layer to a depth of 1-3 mm for dose detection. The detection frequency of the insertion-type dose sensor is no less than 10 Hz, which can reflect the changes in irradiation dose inside the material in real time.

[0019] Furthermore, each horizontal conveyor belt has an antistatic coating on its surface, and a negative pressure adsorption device is installed under the conveyor belt to adsorb the thin layer of material onto the surface of the conveyor belt, preventing the material from flying or shifting during the conveying process and ensuring the uniformity of irradiation.

[0020] Furthermore, it also includes a safety protection module, which includes a lead shielding room, a radiation dose alarm, and an emergency shutdown device. The layered progressive irradiation treatment module and the energy recovery module are both located inside the lead shielding room, which can effectively shield radiation. The radiation dose alarm is located at the entrance and exit of the lead shielding room and will sound an alarm when the radiation dose exceeds the safety threshold. The emergency shutdown device is located inside and outside the lead shielding room, respectively, and can quickly cut off the power supply in an emergency to ensure the safety of the operators.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] ( ) Good irradiation uniformity: The material pretreatment dispersion module evenly disperses the sheath material particles into a thin layer of material with a thickness of 1-3mm, avoiding material accumulation; then the layered progressive irradiation processing module irradiates the material layer by layer, and the material is automatically flipped between each layer, so that all parts of the material can obtain a uniform irradiation dose, and the crosslinking degree deviation of the product can be controlled within ±2%, which significantly improves the consistency of product performance.

[0023] ( ) Sufficient internal irradiation: The irradiation structure with upward and downward opposing beams, combined with the thin-layer material design, allows the electron beam to completely penetrate the material layer, ensuring that the material can also receive sufficient irradiation dose. This solves the problem of insufficient internal irradiation in existing technologies, and the product crosslinking degree can reach 70%-85%, meeting various application requirements.

[0024] ( ) High irradiation efficiency: The layered and progressive structure allows materials to be irradiated during continuous transport, increasing production efficiency by 2-3 times compared to existing technologies. At the same time, the output power of each electron accelerator can be adjusted independently, enabling precise control of the irradiation dose based on the actual condition of the material, avoiding excessive irradiation and further improving production efficiency.

[0025] ( ) Low energy consumption: The energy recovery module can recover about 40%-50% of the electron beam energy that is not absorbed by the material and convert it into electrical energy to power the auxiliary equipment of the device, which reduces the energy consumption of the entire device by more than 30% and has a significant energy-saving effect.

[0026] ( ) Stable product quality: The multi-dimensional dose real-time monitoring module can simultaneously detect the irradiation dose on the surface and inside of the material. The closed-loop control module adjusts the process parameters in real time according to the detection results, realizing precise control of the irradiation process, avoiding the influence of human factors, and making the product quality more stable and reliable.

[0027] (6) Modular design: The entire device adopts a modular design, with each module being independent of the others, which facilitates installation, maintenance and upgrades; at the same time, the number of irradiation treatment units can be flexibly increased or decreased according to production needs to adapt to different production scales. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0029] In the attached diagram:

[0030] Figure 1 This is an overall structural block diagram of the uniform irradiation treatment device for cross-linked sheathing materials according to the present invention;

[0031] Figure 2 This is a structural block diagram of the material pretreatment and dispersion module of the present invention;

[0032] Figure 3 This is a structural block diagram of the layered progressive irradiation processing module of the present invention;

[0033] Figure 4 This is a structural block diagram of the multi-dimensional dose real-time monitoring module of the present invention;

[0034] Figure 5 This is a structural block diagram of the closed-loop control module of the present invention;

[0035] Figure 6 This is a structural block diagram of the energy recovery module of the present invention;

[0036] In the diagram: 1. Material pretreatment and dispersion module; 2. Layered progressive irradiation treatment module; 3. Finished product collection module; 4. Multi-dimensional real-time dose monitoring module; 5. Closed-loop control module; 6. Energy recovery module; 7. Safety protection module;

[0037] 11. Hopper; 12. Vibrating feeder; 13. Multi-stage dispersing roller assembly; 14. Thickness detection sensor; 41. Surface dose detection unit; 42. Internal dose detection unit; 51. Data acquisition unit; 52. Central processing unit; 53. Execution unit; 61. Electronic collection plate; 62. Energy converter; 63. Energy storage battery; 71. Lead shielding room; 72. Radiation dose alarm; 73. Emergency stop device. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 As shown, the present invention discloses a uniform irradiation treatment device for irradiating cross-linked sheath materials, comprising a material pretreatment and dispersion module 1, a layered progressive irradiation treatment module 2, and a finished product collection module 3 connected in sequence, and further comprising a multi-dimensional dose real-time monitoring module 4, a closed-loop control module 5, an energy recovery module 6, and a safety protection module 7.

[0040] The discharge end of the material pretreatment dispersion module 1 is connected to the feed end of the layered progressive irradiation treatment module 2, and the discharge end of the layered progressive irradiation treatment module 2 is connected to the finished product collection module 3; the multi-dimensional dose real-time monitoring module 4 is respectively set at the outlet of the material pretreatment dispersion module 1 and inside the layered progressive irradiation treatment module 2; the closed-loop control module 5 is electrically connected to the material pretreatment dispersion module 1, the layered progressive irradiation treatment module 2 and the multi-dimensional dose real-time monitoring module 4; the energy recovery module 6 is connected to the layered progressive irradiation treatment module 2; and the safety protection module 7 surrounds the layered progressive irradiation treatment module 2 and the energy recovery module 6.

[0041] like Figure 2 As shown, the material pretreatment dispersion module 1 includes a hopper 11, a vibrating feeder 12, a multi-stage dispersion roller group 13, and a thickness detection sensor 14 connected in sequence. The hopper 11 is used to store the sheathing material particles to be processed, and its bottom is provided with a discharge port, which is connected to the feed end of the vibrating feeder 12. The vibrating feeder 12 is an electromagnetic vibrating feeder, which can uniformly convey the material to the multi-stage dispersion roller group 13. The multi-stage dispersion roller group 13 consists of three sets of dispersion rollers arranged alternately, namely the first dispersion roller, the second dispersion roller, and the third dispersion roller. The first and third dispersing rollers rotate clockwise, while the second dispersing roller rotates counterclockwise. Each set of dispersing rollers has a spiral guide groove on its surface, with a depth of 2 mm and a pitch of 10 mm. When the material passes through the multi-stage dispersing roller set 13, it is gradually dispersed and evenly spread into a thin layer of material with a thickness of 2 mm. The thickness detection sensor 14 is a laser thickness sensor, which is set at the outlet of the third dispersing roller to detect the thickness of the material layer in real time and send the detection signal to the closed-loop control module 5.

[0042] like Figure 3 As shown, the layered progressive irradiation processing module 2 includes three irradiation processing units arranged vertically: the first irradiation processing unit 21, the second irradiation processing unit 22, and the third irradiation processing unit 23. Each irradiation processing unit includes a horizontal conveyor belt, an electron accelerator, and a beam scanner.

[0043] The first irradiation processing unit 21 includes a first horizontal conveyor belt, a first upper electron accelerator, a first lower electron accelerator, a first upper beam scanner, and a first lower beam scanner. The conveying direction of the first horizontal conveyor belt is from left to right, and its feed end is connected to the discharge end of the material pretreatment and dispersion module 1. The first upper electron accelerator is located above the first horizontal conveyor belt, and the first lower electron accelerator is located below the first horizontal conveyor belt. The first upper beam scanner is connected to the output end of the first upper electron accelerator, and the first lower beam scanner is connected to the output end of the first lower electron accelerator. The scanning width of the first upper beam scanner and the first lower beam scanner are both matched with the width of the first horizontal conveyor belt, and the scanning frequency is Hz.

[0044] The second irradiation processing unit includes a second horizontal conveyor belt, a second upper electron accelerator, a second lower electron accelerator, a second upper beam scanner, and a second lower beam scanner. The conveying direction of the second horizontal conveyor belt is from right to left, and its feed end is connected to the discharge end of the first horizontal conveyor belt through a first arc-shaped guide plate 24. The second upper electron accelerator is located above the second horizontal conveyor belt, and the second lower electron accelerator is located below the second horizontal conveyor belt. The second upper beam scanner is connected to the output end of the second upper electron accelerator, and the second lower beam scanner is connected to the output end of the second lower electron accelerator.

[0045] The third irradiation processing unit includes a third horizontal conveyor belt, a third upper electron accelerator, a third lower electron accelerator, a third upper beam scanner, and a third lower beam scanner. The conveying direction of the third horizontal conveyor belt is from left to right, and its feed end is connected to the discharge end of the second horizontal conveyor belt through a second arc-shaped guide plate 25. The discharge end is connected to the finished product collection module 3. The third upper electron accelerator is located above the third horizontal conveyor belt, and the third lower electron accelerator is located below the third horizontal conveyor belt. The third upper beam scanner is connected to the output end of the third upper electron accelerator, and the third lower beam scanner is connected to the output end of the third lower electron accelerator.

[0046] All electron accelerators have an accelerating voltage of 1.5 MeV and a beam power of 50 kW, and the output power of each electron accelerator can be adjusted independently. Each horizontal conveyor belt has an anti-static coating on its surface, and a negative pressure adsorption device is installed under the conveyor belt. The negative pressure value of the negative pressure adsorption device is -0.02 MPa, which can firmly adsorb thin layers of material onto the surface of the conveyor belt and prevent the material from flying or shifting during the conveying process.

[0047] like Figure 4As shown, the multi-dimensional dose real-time monitoring module 4 includes a surface dose detection unit 41 and an internal dose detection unit 42. The surface dose detection unit 41 includes six thin-film dosimeter arrays, respectively positioned above and below the first horizontal conveyor belt, above and below the second horizontal conveyor belt, and above and below the third horizontal conveyor belt. Each thin-film dosimeter array consists of 10 uniformly distributed thin-film dosimeters, capable of detecting the irradiation dose at different locations on the material surface in real time. The internal dose detection unit 42 includes two sets of insertion dose sensors, namely a first insertion dose sensor and a second insertion dose sensor. The first insertion dose sensor is located at the outlet of the first arc-shaped guide plate 24 and is inserted into the material layer to a depth of 2 mm. The second insertion dose sensor is located at the outlet of the second arc-shaped guide plate 25 and is inserted into the material layer to a depth of 2 mm. The insertion dose sensors are diamond dosimeters with a flat detection end, a thickness of 0.3 mm, and a detection frequency of 20 Hz, capable of accurately detecting the irradiation dose inside the material in real time.

[0048] like Figure 5 As shown, the closed-loop control module 5 includes a data acquisition unit 51, a central processing unit 52, and an execution unit 53. The data acquisition unit 51 is electrically connected to the thickness detection sensor 14, the surface dose detection unit 41, and the internal dose detection unit 42, respectively, and is used to acquire the detection signals of each sensor and convert them into digital signals to be sent to the central processing unit 52. The central processing unit 52 adopts an ARM Cortex-A9 processor and has a built-in irradiation dose-crosslinking degree correspondence model and an adaptive PID control algorithm. It can calculate the required irradiation dose and process parameters based on the detection results of material thickness, surface dose, and internal dose, and send control commands to the execution unit 53. The execution unit 53 is electrically connected to the drive motors of the vibrating feeder 12, the multi-stage dispersing roller group 13, each electron accelerator, and each horizontal conveyor belt, respectively, and is used to adjust the operating parameters of each device according to the control commands.

[0049] like Figure 6As shown, the energy recovery module 6 includes six electron collection plates 61, six energy converters 62, and one energy storage battery 63. The six electron collection plates 61 are respectively positioned opposite each electron accelerator, namely below the first upper electron accelerator, above the first lower electron accelerator, below the second upper electron accelerator, above the second lower electron accelerator, below the third upper electron accelerator, and above the third lower electron accelerator. The electron collection plates 61 are made of copper and can efficiently collect electrons that have not been absorbed by the material. Each electron collection plate 61 is connected to an energy converter 62, which is an electrostatic induction energy converter that can convert the kinetic energy of electrons into electrical energy. The output terminals of all energy converters 62 are connected to the energy storage battery 63, which is a lithium iron phosphate battery with a capacity of 100kWh. It is used to store the converted electrical energy and power the device's vibrating feeder, conveyor belt drive motor, sensors, and other auxiliary equipment.

[0050] The safety protection module 7 includes a lead-shielded room 71, a radiation dose alarm 72, and an emergency stop device 73. The lead-shielded room 71 has a wall thickness of 200mm, which can effectively shield electron beam radiation. The layered progressive irradiation processing module 2 and the energy recovery module 6 are both located inside the lead-shielded room 71. The radiation dose alarm 72 is located at the entrance and exit of the lead-shielded room 71 and will issue an audible and visual alarm when the radiation dose exceeds 0.5μSv / h. The emergency stop device 73 includes two emergency stop buttons, one inside and one outside the lead-shielded room 71, respectively. Pressing the emergency stop button can quickly cut off the power supply to all equipment.

[0051] The working process of this embodiment is as follows:

[0052] Material pretreatment: The polyethylene sheath material granules to be treated are added to the hopper 11, and the vibrating feeder 12 uniformly conveys the material to the multi-stage dispersing roller group 13; as the material passes through the first dispersing roller, the second dispersing roller and the third dispersing roller, it is gradually dispersed and evenly spread into a thin layer of material with a thickness of 2mm; the thickness detection sensor 14 detects the thickness of the material layer in real time and sends the detection signal to the closed-loop control module 5; if the thickness of the material layer exceeds the set value, the closed-loop control module 5 will reduce the feeding speed of the vibrating feeder 12 or increase the rotation speed of the multi-stage dispersing roller group 13 to keep the thickness of the material layer within the set range.

[0053] First layer of irradiation: A thin layer of material enters the first horizontal conveyor belt and is firmly adsorbed onto the surface of the conveyor belt under the action of the negative pressure adsorption device; the electron beams emitted by the first upper electron accelerator and the first lower electron accelerator are uniformly scanned on the upper and lower surfaces of the material by the first upper beam scanner and the first lower beam scanner, respectively, to irradiate the material for the first time; the surface dose detection unit 41 detects the irradiation dose on the surface of the material in real time and sends the detection signal to the closed-loop control module 5.

[0054] Material flipping and second-layer irradiation: The material after the first irradiation enters the second horizontal conveyor belt through the first arc-shaped guide plate 24, and is automatically flipped during the guiding process; the second upper electron accelerator and the second lower electron accelerator irradiate the material a second time; the first insertion-type dose sensor detects the internal dose of the material after the first irradiation and sends the detection signal to the closed-loop control module 5; the closed-loop control module 5 adjusts the output power of the second upper electron accelerator and the second lower electron accelerator according to the detection result, so that the material obtains the required irradiation dose.

[0055] Second flipping and third irradiation: The material after the second irradiation enters the third horizontal conveyor belt through the second arc-shaped guide plate 25 and is automatically flipped again; the third upper electron accelerator and the third lower electron accelerator irradiate the material for the third time; the second insertion-type dose sensor detects the internal dose of the material after the second irradiation, and the closed-loop control module 5 adjusts the output power of the third upper electron accelerator and the third lower electron accelerator according to the detection results to ensure that the final crosslinking degree of the material reaches the set requirements.

[0056] Finished product collection: The material that has undergone three irradiation treatments enters the finished product collection module 3 from the discharge end of the third horizontal conveyor belt, completing the entire irradiation crosslinking process.

[0057] Energy recovery: During the irradiation process, electrons that are not absorbed by the material are collected by the electron collection plate 61 on the opposite side. The energy converter 62 converts the kinetic energy of the electrons into electrical energy and stores it in the energy storage battery 63 to power the auxiliary equipment of the device.

[0058] Safety protection: Throughout the operation, the lead shielding room 71 effectively shields radiation, and the radiation dose alarm 72 monitors the radiation dose of the surrounding environment in real time to ensure the safety of operators; in case of emergency, the emergency stop device 73 can be pressed to quickly cut off the power to all equipment.

[0059] In this embodiment, the sheath material being treated is low-density polyethylene sheath material, with the following formula: 100 parts low-density polyethylene, 2 parts crosslinking agent TAIC, 0.5 parts antioxidant 1010, and 2 parts carbon black. After irradiation treatment, the product has a crosslinking degree of 78%, a crosslinking degree deviation of ±1.5%, a tensile strength of 18 MPa, an elongation at break of 450%, and a heat resistance temperature of 105℃. All performance indicators meet the national standard requirements. Compared with the prior art, the production efficiency is increased by 2.5 times, and energy consumption is reduced by 35%.

Claims

1. A uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials, characterized in that, It includes a material pretreatment and dispersion module (1), a layered progressive irradiation treatment module (2) and a finished product collection module (3) connected in sequence, as well as a multi-dimensional dose real-time monitoring module (4), a closed-loop control module (5) and an energy recovery module (6). The material pretreatment dispersion module (1) is used to uniformly disperse the sheath material particles into a continuous thin layer of material. The layered progressive irradiation processing module (2) is used to perform layer-by-layer irradiation crosslinking treatment on thin-layer materials; The multi-dimensional dose real-time monitoring module (4) is used to simultaneously detect the actual irradiation dose on the surface and inside of the material; The closed-loop control module (5) is electrically connected to the material pretreatment dispersion module (1), the layered progressive irradiation treatment module (2) and the multi-dimensional dose real-time monitoring module (4), respectively, and is used to adjust the operating parameters of each module in real time according to the detected actual irradiation dose. The energy recovery module (6) is connected to the layered progressive irradiation processing module (2) and is used to recover electron beam energy that has not been absorbed by the material.

2. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 1, characterized in that, The material pretreatment dispersion module (1) includes a hopper (11), a vibrating feeder (12), a multi-stage dispersion roller group (13), and a thickness detection sensor (14) connected in sequence. The multi-stage dispersion roller group (13) consists of at least three groups of dispersion rollers arranged alternately. Each group of dispersion rollers has a spiral guide groove on its surface, and the rotation directions of adjacent dispersion rollers are opposite. The thickness detection sensor (14) is located at the outlet of the multi-stage dispersion roller group (13) and is electrically connected to the closed-loop control module (5).

3. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 1, characterized in that, The layered progressive irradiation processing module (2) includes at least three irradiation processing units arranged vertically. Each irradiation processing unit includes a horizontal conveyor belt, an electron accelerator, and a beam scanner. The horizontal conveyor belts of adjacent irradiation processing units have opposite conveying directions, and the discharge end of the upper unit is connected to the feed end of the lower unit through an arc-shaped guide plate. The electron accelerators are respectively set above and below each horizontal conveyor belt to form an irradiation structure with vertical and horizontal radiation.

4. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 3, characterized in that, Each of the electron accelerators is connected to a beam scanner at its output end. The scanning width of the beam scanner is matched with the width of the horizontal conveyor belt, and the scanning frequency is 50-200Hz. The accelerating voltage of the electron accelerator is 0.5-3MeV, the beam power is 10-100kW, and the output power of each electron accelerator can be adjusted independently.

5. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 1, characterized in that, The multi-dimensional dose real-time monitoring module (4) includes a surface dose detection unit (41) and an internal dose detection unit (42); the surface dose detection unit (41) includes multiple thin-film dosimeter arrays uniformly arranged above and below each horizontal conveyor belt; the internal dose detection unit (42) includes at least two sets of insertable dose sensors, which are respectively set inside the material layer between two adjacent irradiation processing units.

6. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 5, characterized in that, The insertion-type dose sensor uses a high-temperature resistant and radiation-resistant diamond dosimeter. Its detection end is flat and has a thickness of no more than 0.5 mm, allowing it to be inserted into the material layer to a depth of 1-3 mm for dose detection. The detection frequency of the insertion-type dose sensor is no less than 10 Hz.

7. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claims 2 and 5, characterized in that, The closed-loop control module (5) includes a data acquisition unit (51), a central processing unit (52), and an execution unit (53). The data acquisition unit (51) is electrically connected to the thickness detection sensor (14), the surface dose detection unit (41), and the internal dose detection unit (42), respectively. The central processing unit (52) has a built-in irradiation dose-crosslinking degree correspondence model and an adaptive PID control algorithm. The execution unit (53) is electrically connected to the vibrating feeder (12), the multi-stage dispersing roller group (13), each electron accelerator, and the drive motor of each horizontal conveyor belt, respectively.

8. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 1, characterized in that, The energy recovery module (6) includes an electron collection plate (61), an energy converter (62), and an energy storage battery (63) disposed opposite each electron accelerator. The electron collection plate (61) is used to collect electrons that are not absorbed by the material. The energy converter (62) converts the kinetic energy of the electrons into electrical energy. The energy storage battery (63) is used to store the converted electrical energy and power the auxiliary equipment of the device.

9. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 3, characterized in that, Each of the horizontal conveyor belts has an antistatic coating on its surface, and a negative pressure adsorption device is installed below the conveyor belt to adsorb a thin layer of material onto the surface of the conveyor belt, preventing the material from flying or shifting during the conveying process.

10. The uniform irradiation treatment apparatus for irradiating crosslinked sheathing materials according to claim 1, characterized in that, It also includes a safety protection module (7), which includes a lead shielding room (71), a radiation dose alarm (72), and an emergency shutdown device (73); the layered progressive irradiation processing module (2) and the energy recovery module (6) are both located inside the lead shielding room (71); the radiation dose alarm (72) is located at the entrance and exit of the lead shielding room (71); and the emergency shutdown device (73) is located inside and outside the lead shielding room (71).

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