A device and method for automatically and rapidly detecting the solid content of solvent-based asphalt-based paint

Abstract

The application discloses a kind of solvent type asphalt-based coating solid content full-automatic rapid detection device and detection method, belong to asphalt performance detection equipment technical field, including closed environment box, PLC component and be set in the rotating pot of environment box, power and transmission mechanism, lifting platform, temperature control heating device, weighing device and water vapor exhaust device and cooling fan;PLC component includes the screen and PLC interface being set on closed environment box, and PLC control board, and PLC control board is electrically connected all components;Rotating pot is fixed in lifting platform by rotating bearing support being installed on lifting platform;Temperature control heating device includes non-contact temperature sensor, ceramic heater being set below rotating pot and U-shaped support for fixing ceramic heater;Weighing device includes weighing bull eye and double pressure sensor below weighing bull eye.The application can realize asphalt solid content high precision, high efficiency, full automation, long life stable detection.

Description

Technical Field

[0001] This invention relates to the field of asphalt performance testing equipment, specifically to a fully automatic rapid testing device and method for the solid content of solvent-based asphalt coatings. Background Technology

[0002] In highway construction and maintenance, the solid content of asphalt (especially emulsified asphalt) is one of the key indicators for evaluating the performance of asphalt materials, directly affecting the strength, stability, and service life of the pavement. Too low a solid content leads to insufficient pavement adhesion, resulting in loosening, spalling, and other defects; too high a solid content may increase construction difficulty and affect pavement smoothness. The Ministry of Transport's mandatory industry standard, "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG3410-2025), came into effect on October 1, 2025. The new standard not only revised the original high-temperature evaporation method, improving temperature control accuracy (±1℃), reducing sample quantity (30g±0.5g), and increasing result accuracy (to 0.1%), but also clarified the repeatability / reproducibility error limits. Simultaneously, it added three new test methods: high-temperature distillation, low-temperature evaporation, and rotary evaporation, respectively adapted to samples containing diluents, low-aging residue performance recovery, and rapid detection scenarios. These new methods impose new and more stringent requirements on the temperature control stability, weighing accuracy, automation level, low-aging environment, and data traceability capabilities of testing equipment.

[0003] Currently, asphalt solids content testing largely relies on traditional equipment. This equipment requires manual sample placement, temperature adjustment, stirring assistance, and endpoint determination, making it difficult to meet the new regulations' requirements for accuracy, repeatability, and compatibility with multiple methods. Existing asphalt solids content testing equipment mostly uses open heating chambers, single-point weighing sensors, manual temperature control mechanisms, and simple stirring structures. During testing, it is necessary to manually disassemble and assemble sample containers, manually set heating parameters, intermittently stir the sample, manually determine the volatilization endpoint, and weigh and calculate the results in stages.

[0004] This type of traditional equipment has obvious technical defects: 1. Poor weighing accuracy, unable to meet the accuracy requirements of the new regulations: Relies on manual weighing, lacks an automatic lifting weighing mechanism, and lacks a stable support structure for single-point weighing, with manual operation introducing large errors; while JTG3410-2025 requires results to be accurate to 0.1% and repeatability ≤0.5%, which traditional equipment is difficult to achieve.

[0005] 2. Low temperature control accuracy, failing to meet the new regulations' closed-loop temperature control requirements: Manual temperature measurement using glass thermometers results in measurement lag and poor accuracy. Without closed-loop constant temperature regulation, temperature fluctuations are large (often exceeding ±2℃), and asphalt is prone to localized overheating or insufficient volatilization. The new regulations specify a temperature control accuracy of ±1℃ for the high-temperature evaporation method, and the newly added rotary evaporation method requires multi-stage precise temperature control and nitrogen protection against aging, which traditional equipment cannot achieve.

[0006] 3. Poor mixing uniformity and poor repeatability of test results: Manual stirring is required, there is no automatic stirring structure, the transmission structure is simple, and the sample is heated unevenly, resulting in large deviations in the test results of the same sample in multiple tests; while the new regulations put forward clear limits on the repeatability of results, the manual stirring mode of traditional equipment is difficult to guarantee the consistency of test results.

[0007] 4. Low level of automation, unable to adapt to the new regulations' requirements for rapid testing using multiple methods: The entire process requires manual supervision and operation, resulting in high labor intensity and low testing efficiency; the new regulations have added rapid methods such as rotary evaporation, which traditional equipment cannot automate the entire process, severely restricting the efficiency of on-site rapid testing and batch quality inspection.

[0008] 5. Inconvenient sample loading and repeated disassembly of containers, failing to meet the requirements for rapid on-site testing: Traditional equipment has a fragmented structural design and cumbersome sample loading and unloading, making it difficult to adapt to the on-site application scenarios of "rapid sampling and rapid testing" required by the new regulations.

[0009] 6. Low exhaust efficiency, unable to meet the new regulations' requirements for low aging and high-efficiency water removal: The fan is only used for equipment cooling and cannot directionally exhaust water vapor, resulting in a long testing cycle; the new regulations' low-temperature evaporation method and rotary evaporation method both require efficient and directional water vapor exhaust and anti-skinning design, and traditional exhaust methods are prone to sample aging or insufficient volatilization.

[0010] 7. Poor heat dissipation of the enclosure and lack of dedicated cooling components can lead to aging of electrical components and shortened service life due to long-term high-temperature operation of the equipment: The new regulations involve multiple switching methods in different temperature ranges (room temperature to 260℃). Poor heat dissipation of traditional equipment can easily cause temperature control drift and safety hazards, affecting long-term stability and data reliability.

[0011] 8. Lack of real-time display, printing and uploading of full-process data, and cumbersome data recording and traceability: The new regulations emphasize the traceability and standardization of test data, requiring complete recording of temperature-time curves, quality change processes and environmental parameters. Traditional equipment cannot achieve automatic data collection, storage and remote uploading, making it difficult to meet the laboratory certification and engineering quality traceability requirements under the new regulations. Summary of the Invention

[0012] The technical objective of this invention is to address the above-mentioned shortcomings by providing a fully automated and rapid detection device and method for the solid content of solvent-based asphalt coatings. This invention can solve the technical problems of traditional asphalt solid content detection equipment, such as large errors due to manual weighing, inaccurate temperature measurement by manual glass thermometers, uneven manual stirring, low degree of automation, cumbersome operation, poor heat dissipation of the chamber, and inconvenient data management. It achieves high-precision, high-efficiency, fully automated, and long-life stable detection of asphalt solid content.

[0013] The technical solution adopted by this invention to solve its technical problem is: A fully automatic rapid detection device for solid content of solvent-based asphalt coatings includes a sealed environment chamber, a PLC component, a rotating pot, a power and transmission mechanism, a lifting platform, a temperature control heating device, a weighing device, a water vapor exhaust device, and a cooling fan installed inside the environment chamber. The PLC component includes a control panel and PLC interface set in a sealed environment box, as well as a PLC control board connected through the PLC interface. The PLC control board is electrically connected to all components to realize full-process automated control and real-time display, printing and uploading of full-process data; The power and transmission mechanism includes a rotating motor and transmission gears. A large gear is installed on one side of the rotating pot, and the rotating motor is connected to a small gear. The rotation of the rotating pot is achieved through the meshing of the large gear and the small gear. The rotating pot is fixed to the lifting platform by a rotating bearing installed on the lifting platform; the temperature control heating device includes a non-contact temperature sensor, a ceramic heater located below the rotating pot, and a U-shaped bracket for fixing the ceramic heater, with the bottom of the U-shaped bracket fixed to the lifting platform; the non-contact temperature sensor is located inside the environmental chamber at the position corresponding to the rotating pot. The weighing device includes a weighing bull's eye and a pressure sensor located below the weighing bull's eye. Two sets of weighing bull's eye are symmetrically arranged below both ends of the rotating pot. The rotating pot is lowered to the weighing bull's eye by the lifting platform under the support of the rotating bearing. The dual pressure sensors realize weight acquisition, and automatic weighing is realized through PLC.

[0014] Furthermore, the rotating pot is a snap-on type rotating pot, which is closed and fixed by snap-on mechanisms.

[0015] Furthermore, the environmental chamber is a sealed metal box, which provides a stable and sealed working environment for testing, isolates external temperature, humidity and dust interference, and ensures weighing and temperature control accuracy; a cooling fan is installed on the top of the chamber for forced heat dissipation of the chamber and internal electrical components. The steam exhaust device is an electric fan installed on the side of the environmental chamber corresponding to the position of the rotating pot. The electric fan is a small-sized directional air supply structure that blows air directly above the rotating pot to quickly blow away the steam generated by heating.

[0016] Furthermore, the cooling fan has a size of 120mm×120mm-180mm×180mm; the electric fan and the cooling fan start and stop synchronously.

[0017] Furthermore, the lifting platform is a Z-shaped lifting platform, and the Z-shaped lifting platform is electrically connected to the PLC; The Z-shaped lifting platform extends to a support platform, and the support platform has vertically arranged support frames on both sides; the rotary bearing is fixed to the upper part of the support frame.

[0018] Furthermore, the Z-shaped lifting platform is equipped with a matching lifting button.

[0019] Furthermore, the control screen is an industrial touch screen that displays temperature, weight, and solid content data in real time throughout the entire process, and has functions such as feeding, starting, stopping, printing, data recording, and uploading.

[0020] This invention also claims a fully automated rapid detection method for the solid content of solvent-based asphalt coatings. This method is based on the aforementioned fully automated rapid detection device for the solid content of solvent-based asphalt coatings, and includes the following steps: (1) System self-test: After the device is powered on, the lifting platform rises to the highest position, and the PLC automatically completes the self-test of weighing, temperature sensing, pot rotation and fan operation, and enters standby mode; (2) Empty pot weighing: The lifting platform descends, the rotating pot falls to the weighing bull's eye, and is automatically weighed by dual pressure sensors. The original mass m0 of the empty pot is collected and the tare is automatically removed. (3) Rapid feeding: Use the guide tube to add the asphalt sample into the rotary pot and weigh the mass m1, and the lifting platform rises; (4) Constant temperature stirring and exhaust cooling: The ceramic heater heats the water, the rotating pot automatically stirs instead of manually stirring, the electric fan dehumidifies, and the cooling fan runs synchronously to cool down the water. The non-contact temperature sensor replaces the glass thermometer for manual temperature measurement, realizing real-time temperature measurement, and the PLC control realizes closed-loop temperature control. (5) Finished product weighing: After heating is completed and the moisture and volatiles have completely evaporated, the lifting platform descends again and the total mass m2 is automatically collected by the dual pressure sensors. (6) Data output: The PLC automatically calculates the solid content and outputs the data. The control screen displays the data in real time throughout the entire process and supports recording, storage, printing and uploading.

[0021] Furthermore, the rotation speed of the rotary pot is 10-100 r / min; The PLC-controlled temperature program is to raise the temperature to 110±10℃ and hold it for 5-15 minutes, then rapidly raise it to 155±5℃. Once the temperature stabilizes, heat it to 163±1℃ and hold it for one minute.

[0022] Furthermore, the solid content R1 is expressed as a percentage and is calculated using the following formula: R1 = (m2 - m0) / (m1 - m0); the volatile matter content R2 is calculated using the formula: R2 = 100 - R1.

[0023] Compared with the prior art, the fully automatic rapid detection device and method for solid content of solvent-based asphalt coatings of the present invention have the following advantages: 1. More accurate automatic weighing: Dual pressure sensors + automatic lifting weighing replace manual weighing, with a weighing error of ≤±0.01g, eliminating the error of manual weighing operation; 2. More stable automatic temperature measurement: Non-contact temperature sensor replaces glass thermometer for manual temperature measurement, PLC closed-loop temperature control, temperature fluctuation ≤±1℃, no temperature lag and higher accuracy; 3. More uniform automatic stirring: The rotary pot's automatic stirring replaces manual stirring. The gear meshing transmission ensures stable rotation, uniform sample heating, and significantly improved test repeatability. 4. Smarter data management: Real-time display, printing and uploading of data throughout the entire process; convenient and traceable data recording to meet on-site testing and traceability needs; 5. Improved testing efficiency: Directional dehumidification by electric fans and fully automated process reduce the testing time by more than 50%; 6. Easy operation and maintenance: The rotating pot is secured by clips, making disassembly convenient; 7. High degree of automation: PLC fully automates the entire process, reducing labor intensity by more than 80%; 8. Extended equipment lifespan: The top cooling fan enables forced cooling, preventing electrical components from aging due to high temperatures. Attached Figure Description

[0024] Figure 1 This is a schematic elevation view of a fully automatic rapid detection device for the solid content of solvent-based asphalt coatings provided in one embodiment of the present invention; Figure 2 This is a top view of a fully automatic rapid detection device for the solid content of solvent-based asphalt coatings provided in one embodiment of the present invention; Figure 3 The left view shows a fully automatic rapid detection device for the solid content of solvent-based asphalt coatings provided in one embodiment of the present invention.

[0025] In the diagram: 1. Cooling fan, 2. Control panel, 3. PLC interface, 4. Environmental chamber, 5. Electric fan, 6. Temperature sensor, 7. Buckle, 8. Rotary pot, 9. Large gear, 10. Motor, 11. Pressure sensor, 12. Small gear, 13. Ceramic heater, 14. U-shaped bracket, 15. Rotary bearing, 16. Weighing bullseye, 17. Z-shaped lifting platform, 18. Lifting button. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] This invention provides a fully automatic rapid detection device for the solid content of solvent-based asphalt coatings, including a sealed environmental chamber 4, a PLC component, a rotating pot 8 integrated within the environmental chamber 4, a power and transmission mechanism, a lifting platform, a temperature control heating device, a weighing device, a water vapor exhaust device, and a cooling fan 1.

[0028] The environmental chamber 4 is a sealed metal enclosure, providing a stable and sealed working environment for testing, isolating it from external temperature, humidity, and dust interference, and ensuring weighing and temperature control accuracy. A cooling fan 1 is installed on its top for forced heat dissipation from the chamber and internal electrical components. The environmental chamber 4 can be made of 1.5mm-2.0mm thick 304 stainless steel, and the cooling fan 1 has dimensions of 120mm×120mm-180mm×180mm.

[0029] The PLC assembly includes a control panel 2 and a PLC interface 3 mounted on the environmental enclosure 4, as well as a PLC control board connected via the PLC interface 3. The PLC control board is electrically connected to all components, enabling full-process automated control and real-time display, printing, and uploading of full-process data.

[0030] The power and transmission mechanism includes a motor 10 and transmission gears. A large gear 9 is installed on one side of the rotating pot 8, and the motor 10 is connected to a small gear 12. The meshing of the large gear 9 and the small gear 12 drives the motor 10 to rotate the rotating pot 8, thereby achieving automatic rotation and stirring under PLC control. The rotating pot 8 is a snap-fit ​​type, made of stainless steel, and uses snap-fit ​​7 to achieve quick closing and quick disassembly. The rotating pot 8 is supported and fixed to the lifting platform by a rotating bearing 15 mounted on the lifting platform. The motor 10 can be a 24V DC geared motor with a speed of 20r / min-30r / min, driving the rotating pot for automatic stirring. The automatic stirring of the rotating pot 8 replaces manual stirring, and in conjunction with a steam exhaust device for directional dehumidification, it can accelerate moisture evaporation.

[0031] The lifting platform is a Z-shaped lifting platform 17, which is electrically connected to the PLC. The Z-shaped lifting platform 17 extends to a support platform, and vertically arranged support frames are located on both sides of the support platform; the rotary bearing 15 is fixed to the upper part of the support frame. The Z-shaped lifting platform also has a matching lifting button for easy debugging and backup.

[0032] The temperature control heating device includes a non-contact temperature sensor 6, a ceramic heater 13 positioned below the rotating pot 8, and a U-shaped bracket 14 for fixing the ceramic heater 13. The bottom of the U-shaped bracket 14 is fixed to the lifting platform. The non-contact temperature sensor 6 replaces manual temperature measurement using a glass thermometer, and the power of the ceramic heater 13 is adjusted via a PLC closed-loop control, ensuring temperature fluctuations of ≤±1℃.

[0033] The weighing device includes weighing bull's eyeballs 16 and pressure sensors 11 located below the weighing bull's eyeballs 16. Two sets of weighing bull's eyeballs 16 are symmetrically arranged below both ends of the rotating pot 8. The rotating pot 8, supported by the rotating bearings 15, descends with the Z-shaped lifting platform 17 to the weighing bull's eyeballs 16 on both sides. The pressure sensors 11 on both sides collect the weight, and automatic weighing is achieved through a PLC. Automatic lifting and weighing with dual pressure sensors replaces manual weighing, and the weighing error is ≤ ±0.01g.

[0034] The steam exhaust device is an electric fan 5 located inside the environmental chamber 1, corresponding to the position of the rotating pot 8. The electric fan 5 is a small-sized directional air supply structure that blows air directly above the rotating pot 8 to quickly remove the steam generated during heating. The electric fan 5 starts and stops synchronously with the cooling fan 1.

[0035] The control screen 2 is an industrial touch screen that displays temperature, weight, and solid content data in real time throughout the entire process, and has functions such as feeding, starting, stopping, printing, data recording, and uploading.

[0036] This invention also provides a fully automated rapid detection method for the solid content of solvent-based asphalt coatings. This method is based on the aforementioned fully automated rapid detection device for the solid content of solvent-based asphalt coatings and includes the following steps: (1) System self-test: After the device is powered on, the Z-shaped lifting platform 17 rises to the highest position, and the PLC automatically completes the self-test of weighing, temperature sensing, pot rotation and fan operation, and enters standby mode.

[0037] (2) Empty pot weighing: The Z-shaped lifting platform 17 descends, the rotating pot 8 falls to the weighing bull's eye ball 16, and is automatically weighed by dual pressure sensors. The original mass m0 of the empty pot is collected and automatically tare.

[0038] (3) Rapid feeding: The asphalt sample is added to the rotary pot 8 using the guide pipe and weighed as mass m1. The Z-shaped lifting platform 17 is raised.

[0039] (4) Constant temperature stirring and exhaust cooling: ceramic heater 13 heats the water, rotary pot 8 automatically stirs instead of manual stirring, electric fan 5 dehumidifies, and cooling fan 1 runs synchronously to cool down the water. Non-contact temperature sensor 16 replaces glass thermometer for manual temperature measurement, realizes real-time temperature measurement, and realizes closed-loop temperature control through PLC control; the rotation speed of the rotary pot is 10-100r / min. (5) The PLC temperature control program is to raise the temperature to 110±10℃ and hold it for 5-15 minutes, then quickly raise the temperature to 155±5℃, wait for the temperature to stabilize, heat it to 163±1℃ and hold it for one minute.

[0040] (6) Finished product weighing: After heating is completed and the moisture and volatiles have completely evaporated, the Z-shaped lifting platform 17 descends again and the total mass m2 is automatically collected by the dual pressure sensors. (7) Data output: The PLC automatically calculates the solid content and outputs the data. The control screen 2 displays the data in real time throughout the process and supports recording, storage, printing and uploading.

[0041] (8) The solid content R1 is in % and is calculated according to the following formula: R1=( m2- m0) / ( m1- m0); the volatile content R2 is calculated according to the formula: R2=100-R1.

[0042] The following specific testing cases further illustrate the application of the testing device and the implementation of the testing method of the present invention.

[0043] Test Case 1: Solid Content Testing of Emulsified Asphalt I. The device components and some parameter settings are as follows: The environmental chamber 4 is made of 1.5mm thick 304 stainless steel sealed chamber with internal dimensions of 450mm×350mm×500mm; Cooling fan 1 is the top axial fan of environmental enclosure 4, with dimensions of 120mm × 120mm; Control Screen 2 uses a 7-inch industrial touch screen, which supports real-time data display, printing, and uploading; Fan 5 uses an 80mm×80mm directional axial flow fan; Temperature sensor 6 is a 0-250℃ non-contact type, replacing manual temperature measurement with a glass thermometer. The rotating pot 8 is made of 304 stainless steel with a capacity of 500ml and is fixed by buckle 7. Automatic stirring replaces manual stirring. Motor 10 is a 24V DC geared motor with a speed of 20 r / min; The pinion 12 and the gear 9 are configured with a module of 2 and a transmission ratio of 3:1. The pressure sensor 11 has a selection parameter of 0-500g and an accuracy of 0.01g, and can be used with an automatic lifting mechanism to replace manual weighing. The ceramic heater 13 has a power of 1000W and is supported by a U-shaped bracket 14; Rotary bearing 15 is selected from precision deep groove ball bearings; The weighing bob eyeball 16 uses stainless steel precision ball bearings. The lifting stroke of the Z-shaped lifting platform 17 is 120mm.

[0044] II. Testing Steps: System self-test: The Z-shaped lifting platform 17 rises to the high position, and the device is connected to power and performs a self-test; Peeling the empty pot: The Z-shaped lifting platform 17 descends, the rotating pot 8 falls to the weighing bull's eye ball 16, and the automatic weighing replaces the manual weighing. The empty pot weighs 280.52g and is peeled. Sample feeding: The Z-shaped lifting platform 17 rises and adds 300g of emulsified asphalt to the rotating pot 8; Constant temperature stirring and exhaust cooling: 135℃ constant temperature heating for 25 minutes, 8 rotating pots automatically stir instead of manual stirring, 5 electric fans dehumidify, 1 cooling fan cools and operates simultaneously, 6 temperature sensors non-contact temperature measurement replaces glass thermometers for manual temperature measurement. Finished product weighing: The Z-shaped lifting platform 17 descends, and the total mass of 448.36g is automatically weighed and collected. Data calculation: residual mass 167.84g, solid content 55.95%, data is displayed in real time and can be printed and uploaded. Implementation effect

[0045] Dual pressure sensors automatically lift and weigh the sample, replacing manual weighing with a weighing error of ≤±0.01g; non-contact temperature sensors replace manual temperature measurement with glass thermometers, ensuring stable temperature control; the rotating pot automatically stirs the sample, replacing manual stirring, ensuring uniform heating; real-time display, printing, and uploading of data throughout the entire process; testing time of 30 minutes; and stable chamber temperature of ≤45℃.

[0046] Test Case 2: Solid Content Testing of Modified Emulsified Asphalt I. The device components and some parameter settings are as follows: The environmental enclosure 4 is made of 2.0mm thick 304 stainless steel with a sealed enclosure and a sealing rating of IP54; the cooling fan 1 is 150mm×150mm in size and has an adaptive speed control. The fan speed is adjustable; the temperature sensor 6 is selected with an accuracy of ±0.1℃, which is a non-contact replacement for manual temperature measurement using a glass thermometer; The rotating pot 8 is made of 304 stainless steel with a capacity of 600ml and is fixed by buckle 7. Automatic stirring replaces manual stirring. Motor 10 is a 24V DC geared motor with a speed of 25 r / min; The pressure sensor 11 is selected with a zero drift of ≤0.005g, and automatic lifting and weighing replaces manual weighing; The ceramic heater 13 performs segmented heating with a constant temperature power of 300W; The positioning accuracy of the Z-shaped lifting platform 17 is ±0.5mm; ControlScreen 2 supports full-process data display, printing, and uploading.

[0047] II. Testing Steps: System self-test: The Z-shaped lifting platform 17 rises to the high position, and the device is connected to power and performs a self-test; Peeling the empty pot: The Z-shaped lifting platform 17 descends, the rotating pot 8 falls to the weighing bull's eye ball 16, and the automatic weighing replaces the manual weighing. The empty pot weighs 312.18g and is peeled. Sample addition: The Z-shaped lifting platform 17 rises, and 350g of modified emulsified asphalt is injected into the rotating pot 8; Heating and stirring: Heating at 145℃ for 30 minutes, with the rotating pot 8 automatically stirring, the electric fan 5 and the cooling fan 1 working simultaneously, and non-contact temperature measurement; Finished product weighing: The Z-shaped lifting platform 17 descends, and the total mass is automatically weighed and collected after the quality stabilizes; Results output: Total mass 518.62g, solid content 58.98%, data displayed in real time, printed and uploaded. Implementation effect

[0048] Dual pressure sensors enable automatic lifting and weighing, replacing manual weighing with a weighing error of ≤±0.01g; non-contact temperature measurement replaces manual temperature measurement with glass thermometers, with temperature fluctuations of ≤±0.8℃; automatic stirring and weighing in a rotating pot replace manual operation, improving detection efficiency by 60%; and all process data can be displayed, printed, and uploaded in real time.

[0049] Case Study 3: Solid Content Testing of SBS Modified Asphalt I. The components and parameter settings of some devices are as follows: The environmental chamber 4 is made of 304 stainless steel with a sealed enclosure and a 10mm aluminum silicate cotton insulation layer; the cooling fan 1 is 180mm×180mm in size and has a high air volume. Fan 5 is a high-speed directional exhaust fan; The response time of temperature sensor 6 is ≤1s, making it a non-contact alternative to manual temperature measurement using glass thermometers. The rotating pot 8 is made of 304 stainless steel and has heat-conducting fins at the bottom, with automatic stirring replacing manual stirring. The rotational speed of motor 10 is 30 r / min; The weighing bull's eyeball 16 is made of wear-resistant ceramic material; Pressure sensor 11 with temperature compensation enables automatic lifting and weighing, replacing manual weighing. Control Screen 2 enables full-process data display, printing, and uploading.

[0050] II. Testing Steps System preparation: Z-shaped lifting platform 17 is in high-position standby, cooling fan 1 is pre-started; Peeling the empty pot: The Z-shaped lifting platform 17 descends, the rotating pot 8 falls to the weighing bull's eye ball 16, and the automatic weighing replaces the manual weighing. The empty pot weighs 295.36g and is peeled. Sample feeding: The Z-shaped lifting platform 17 rises and adds 280g of SBS asphalt to the rotating pot 8; Constant temperature stirring and exhaust cooling: 160℃ constant temperature for 35 minutes, rotating pot 8 automatic stirring, temperature sensor 6 non-contact temperature measurement; Secondary verification of finished product weighing: The Z-shaped lifting platform descends 17 meters, and the total mass is automatically weighed and collected; after standing for 5 minutes, the total mass is automatically weighed again. Output results: Solid content 64.73%, data displayed in real time, printed and uploaded. Implementation effect

[0051] Dual pressure sensors enable automatic lifting and weighing, replacing manual weighing with a weighing error of ≤±0.01g; automatic stirring in a rotating pot replaces manual stirring, preventing high-viscosity asphalt from clumping; automatic weighing and non-contact temperature measurement replace manual operation, with a single test time of ≤45min and stable continuous operation; real-time display of full-process data, which can be printed and uploaded.

[0052] Through the specific embodiments described above, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

[0053] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

Claims

1. A fully automatic rapid detection device for the solid content of solvent-based asphalt coatings, characterized in that, It includes a sealed environment chamber, a PLC assembly, a rotating pot, a power and transmission mechanism, a lifting platform, a temperature control and heating device, a weighing device, a steam exhaust device, and a cooling fan installed inside the environment chamber. The PLC component includes a control panel and PLC interface set in a sealed environment box, as well as a PLC control board connected through the PLC interface. The PLC control board is electrically connected to all components to realize full-process automated control and real-time display, printing and uploading of full-process data; The power and transmission mechanism includes a rotating motor and transmission gears. A large gear is installed on one side of the rotating pot, and the rotating motor is connected to a small gear. The rotation of the rotating pot is achieved through the meshing of the large gear and the small gear. The rotating pot is fixed to the lifting platform by a rotating bearing installed on the lifting platform; the temperature control heating device includes a non-contact temperature sensor, a ceramic heater set below the rotating pot, and a U-shaped bracket for fixing the ceramic heater, with the bottom of the U-shaped bracket fixed to the lifting platform; The weighing device includes a weighing bull's eye and a pressure sensor located below the weighing bull's eye. Two sets of weighing bull's eye are symmetrically arranged below both ends of the rotating pot. The rotating pot is lowered to the weighing bull's eye by the lifting platform under the support of the rotating bearing. The dual pressure sensors realize weight acquisition, and automatic weighing is realized through PLC.

2. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 1, characterized in that, The rotating pot is a snap-on type, which achieves closure and fixation of the rotating pot through snap-on mechanisms.

3. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 1, characterized in that, The environmental enclosure is a sealed metal enclosure with a cooling fan installed on top for forced cooling of the enclosure and internal electrical components. The steam exhaust device is an electric fan installed on the side of the environmental chamber corresponding to the position of the rotating pot. The electric fan is a small-sized directional air supply structure that blows air directly above the rotating pot to quickly blow away the steam generated by heating.

4. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 3, characterized in that, The cooling fan measures 120mm×120mm-180mm×180mm; the electric fan and the cooling fan start and stop synchronously.

5. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 1, characterized in that, The lifting platform is a Z-shaped lifting platform, and the Z-shaped lifting platform is electrically connected to the PLC; The Z-shaped lifting platform extends to a support platform, and the support platform has vertically arranged support frames on both sides; the rotary bearing is fixed to the upper part of the support frame.

6. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 5, characterized in that, The Z-shaped lifting platform is equipped with a matching lifting button.

7. The fully automatic rapid detection device for solid content of solvent-based asphalt coatings according to claim 1, characterized in that, The control screen is an industrial touch screen that displays temperature, weight, and solid content data in real time throughout the entire process. It has functions such as feeding, starting, stopping, printing, data recording, and uploading.

8. A fully automated and rapid method for detecting the solid content of solvent-based asphalt coatings, characterized in that, This method is based on the fully automated rapid detection device for solid content of solvent-based asphalt coatings as described in any one of claims 1 to 7, and the method includes the following steps: (1) System self-test: After the device is powered on, the lifting platform rises to the highest position, and the PLC automatically completes the self-test of weighing, temperature sensing, pot rotation and fan operation, and enters standby mode; (2) System self-check: The lifting platform descends, the rotating pot falls to the weighing bull's eye, and is automatically weighed by dual pressure sensors. The original mass m0 of the empty pot is collected and the tare is automatically removed. (3) Rapid feeding: Add the asphalt sample to the rotary pot and weigh it as mass m1, and the lifting platform rises; (4) Constant temperature stirring and exhaust cooling: The ceramic heater heats the water, the rotating pot stirs automatically, the electric fan dehumidifies, and the cooling fan runs synchronously to cool the water. The non-contact temperature sensor measures the temperature in real time and the PLC controls the closed-loop temperature control. (5) Finished product weighing: After heating is completed and the moisture and volatiles have completely evaporated, the lifting platform descends again and the total mass m2 is automatically collected by the dual pressure sensors. (6) Data output: The PLC automatically calculates the solid content and outputs the data. The control screen displays the data in real time throughout the entire process and supports recording, storage, printing and uploading.

9. The fully automated rapid detection method for solid content in solvent-based asphalt coatings according to claim 8, characterized in that, The rotation speed of the rotary pot is 10-100 r / min; The PLC-controlled temperature program is to raise the temperature to 110±10℃ and hold it for 5-15 minutes, then rapidly raise it to 155±5℃. Once the temperature stabilizes, heat it to 163±1℃ and hold it for one minute.

10. The fully automated rapid detection method for solid content of solvent-based asphalt coatings according to claim 8, characterized in that, The solid content R1 is expressed as a percentage and is calculated using the following formula: R1 = (m2 - m0) / (m1 - m0); the volatile matter content R2 is calculated using the formula: R2 = 100 - R1.

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