Temperature control stirring equipment for preparing asphalt mixture
By using a multi-compartment structure and insulation jacket design, combined with the use of inert gas and heat transfer oil, the problems of temperature control in the pretreatment of RAP recycled materials and new aggregates and asphalt coating in low-temperature environments were solved, reducing aggregate heating energy consumption and improving mixture quality and construction efficiency.
Patent Information
- Application Number
- CN202511372289.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2025-11-21
AI Technical Summary
Existing asphalt mixture preparation equipment faces challenges such as temperature control during the pretreatment of RAP recycled materials and new aggregates, asphalt coating properties and modifier stability at low temperatures, and high energy consumption for aggregate heating, all of which affect the quality and energy efficiency of the mixture.
The multi-compartment structure and insulation jacket design, combined with the use of inert gas and heat transfer oil, enable precise temperature control and energy recovery of each raw material, prevent aging of RAP recycled material, ensure the modification effect of asphalt, and reduce aggregate heating energy consumption.
It achieves uniform mixing of RAP recycled material and new aggregate, ensuring the integrity of the asphalt film and the stability of the modifier, while reducing equipment energy consumption and improving the road performance and construction efficiency of the mixture.
Smart Images
Figure CN120989969A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of road construction machinery technology, and more specifically to a temperature-controlled mixing device for asphalt mixture preparation. Background Technology
[0002] Temperature-controlled mixing equipment for asphalt mixture preparation is widely used in the road construction field and plays a key role in ensuring the quality of mixtures, improving construction efficiency, and achieving green production.
[0003] The main structure of temperature-controlled mixing equipment for asphalt mixture preparation typically includes a mixing host, a heating and temperature control system, a drive system, a metering system, and a dust removal system. The temperature control system precisely regulates the aggregate drying temperature, asphalt heating temperature, and mixture discharge temperature according to process requirements. These components work together to complete core preparation processes such as cold aggregate drying and heating, precise batching, uniform mixing, precise temperature control, and environmentally friendly emissions. It features high-precision temperature control, strong stability, and automated control. However, the above-mentioned working method still has the following shortcomings: 1. The challenge of temperature control for the pretreatment of RAP recycled materials and new aggregates. Precise temperature control of RAP recycled materials and new aggregates during the pretreatment stage is crucial. If the temperature of the recycled materials is too high, it can easily cause secondary aging of the asphalt, leading to a decrease in its bonding performance. Insufficient heating of the new aggregates will affect the uniformity of subsequent mixing. Furthermore, achieving precise and differentiated temperature control for both during the dynamic pretreatment process is not only technically complex but also accompanied by significant energy consumption. 1. The problem of viscosity increase has become a key factor restricting the energy efficiency of the equipment; 2. The problem of asphalt coating and modifier stability under low temperature conditions. Under low temperature conditions, the viscosity of asphalt increases sharply, which leads to a significant decrease in the uniformity of its coating on the aggregate surface, making it difficult to form a complete and uniform asphalt film, which seriously affects the road performance of the mixture. At the same time, the polymer modifier in modified asphalt is more prone to degradation, segregation or "phase separation" under low temperature or temperature fluctuation, which leads to the failure or weakening of its modification effect, making the performance of the mixture unable to meet the design requirements; 3. The energy consumption of aggregate heating is too high. In the entire process of asphalt mixture preparation, heating a large amount of cold aggregate to the high temperature required by the process is the absolute main body of the energy consumption of the whole set of equipment, which often accounts for as high as 70% or even more than 80%. This huge demand for heat energy mainly relies on fuel combustion, which not only greatly increases the operating cost of the equipment, but also has a significant contradiction with the current green, low-carbon, energy-saving and emission-reduction goals promoted by the industry. Summary of the Invention
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a temperature-controlled mixing device for asphalt mixture preparation, so as to solve the problems existing in the background art.
[0005] This invention provides the following technical solution: a temperature-controlled mixing device for asphalt mixture preparation, wherein an inert gas inlet and a preheating air inlet are provided on the top front side of the mixing chamber, a bottom plate is fixedly connected to the bottom of the mixing chamber, a support plate is fixedly connected to the middle of the mixing chamber, a top plate is fixedly connected to the top of the mixing chamber, a hydraulic rod base is fixedly connected to the top of the top plate, a discharge hydraulic rod is connected to the side of the hydraulic rod base, a discharge port is movably connected to the end of the discharge hydraulic rod, a heat insulation jacket is provided inside the wall of the mixing chamber, a heat-conducting ring is fixedly connected inside the heat insulation jacket, and an exhaust pipe is fixedly connected to the top side of the mixing chamber. An exhaust motor is fixedly connected to the side of the exhaust pipe of the mixing and processing chamber. A processing chamber top plate is set on the inner side of the top of the mixing and processing chamber. An outer mixing arm ring frame is set inside the processing chamber top plate. A processing chamber transmission gear is set on the top of the processing chamber top plate. A premixing chamber hydraulic arm base is fixedly connected to the top of the processing chamber top plate. A premixing chamber unloading hydraulic arm is set on the side of the premixing chamber hydraulic arm base. An outer ring mixing arm is fixedly connected to the bottom of the outer mixing arm ring frame. A processing chamber mixing screw is set in the middle of the mixing and processing chamber. A processing chamber oil return electric tee is set on the top side of the mixing and processing chamber. An oil inlet of the processing chamber is set at the bottom of the processing chamber oil return electric tee. A preheating premixing chamber is fixedly connected to the top of the mixing and processing chamber. An asphalt constant temperature temporary storage chamber is fixedly connected to the top of the top plate. A waste heat recovery box is fixedly connected to the top of the support plate.
[0006] Furthermore, a scraper for the inner wall of the processing chamber is fixedly connected to the rear side of the outer ring stirring arm, a stirring fork is fixedly connected to the front side of the outer ring stirring arm, a spiral plate is fixedly connected to the side of the processing chamber stirring screw, a processing chamber oil return port is fixedly connected to the side of the processing chamber oil return electric tee, and a processing chamber tee motor is fixedly connected to the rear side of the processing chamber oil return electric tee.
[0007] Furthermore, a premixing chamber top plate is fixedly connected to the top of the preheating and premixing chamber, a premixing chamber motor base is fixedly connected to the middle of the premixing chamber top plate, a premixing chamber stirring motor is fixedly connected to the rear side of the premixing chamber motor base, a premixing chamber air inlet three-way valve is provided on the side of the premixing chamber motor base, a premixing chamber preheating air port is provided on the top of the premixing chamber air inlet three-way valve, a premixing chamber inert air port is fixedly connected to the side of the premixing chamber air inlet three-way valve, a premixing chamber air inlet conversion motor is fixedly connected to the rear side of the premixing chamber air inlet three-way valve, a premixing chamber stirring shaft is fixedly connected to the bottom of the premixing chamber motor base, and a premixing chamber stirring fork is fixedly connected to the side of the premixing chamber stirring shaft.
[0008] Furthermore, a premixed silo vent valve is provided on the top of the premixed silo top plate, a premixed silo feed port is provided on the top of the premixed silo top plate, a premixed silo oil return three-way valve is provided on the top side of the preheating premixed silo, a premixed silo oil return port is fixedly connected to the side of the premixed silo oil return three-way valve, a premixed silo oil return motor is fixedly connected to the rear side of the premixed silo oil return three-way valve, and a premixed silo oil inlet is provided on the bottom side of the preheating premixed silo.
[0009] Furthermore, a temporary storage tank return oil tee is fixedly connected to the top side of the asphalt constant temperature temporary storage tank, a temporary storage tank return oil port is provided on the front side of the temporary storage tank return oil tee, a temporary storage tank return oil tee motor is fixedly connected to the side of the temporary storage tank return oil tee, a temporary storage tank inlet is provided on the bottom side of the asphalt constant temperature temporary storage tank, an asphalt pump is fixedly connected to the bottom of the asphalt constant temperature temporary storage tank, an asphalt pump motor is fixedly connected to the rear side of the asphalt pump, an asphalt feed pipe is provided at the bottom of the asphalt pump, and a temporary storage tank inert gas pipe is provided on the top side of the asphalt constant temperature temporary storage tank.
[0010] Furthermore, the top of the asphalt constant temperature temporary storage silo is fixedly connected to a temporary storage silo top plate, the interior of the temporary storage silo top plate has an annular channel, the top of the temporary storage silo top plate has a temporary storage silo inlet, the top of the temporary storage silo top plate is fixedly connected to a temporary storage silo mixing motor base, the rear side of the temporary storage silo mixing motor base is fixedly connected to a temporary storage silo mixing motor, the bottom of the temporary storage silo mixing motor base is fixedly connected to a temporary storage silo mixing shaft, the side of the temporary storage silo mixing shaft is fixedly connected to a premixing silo mixing fork, the interior of the asphalt constant temperature temporary storage silo has a temporary storage silo insulation jacket, and the interior of the temporary storage silo insulation jacket is fixedly connected to a temporary storage silo heat-conducting ring plate.
[0011] Furthermore, an inert gas storage tank is fixedly connected to the top of the support plate, and a hydraulic rod base for the processing chamber is fixedly connected to the top of the base plate.
[0012] Furthermore, the waste heat recovery box is internally connected to heat exchange plates, an air preheating pipe is provided in the middle of the heat exchange plates, an inert gas preheating pipe is provided in the middle of the heat exchange plates, and a processing chamber exhaust gas inlet is fixedly connected to the side of the waste heat recovery box.
[0013] The technical effects and advantages of this invention are as follows:
[0014] 1. This invention, by installing a three-way premixing chamber air inlet valve at the top of the premixing chamber, and by supplying gas from the inert air inlet of the premixing chamber connected to the three-way premixing chamber air inlet valve, enables temperature control of the RAP recycled material and new aggregate inside the premixing chamber, preheating both materials. Simultaneously, heat transfer oil flows within the premixing chamber's insulation jacket, and the heat exchange process is accelerated by the heat-conducting rings inside the insulation jacket. The premixing silo's return oil three-way valve controls the return flow of heat transfer oil, enabling precise temperature control of RAP and new aggregates to ensure that cooling construction requirements are met. The premixing silo's mixing fork, located on the mixing shaft inside the premixing silo, achieves initial uniform mixing of new aggregates and RAP, forming a gradation base. When the temperature inside the premixing silo is too high, the premixing silo's air inlet three-way valve cuts off the entry of preheating air, allowing preheated inert gas to be introduced into the premixing silo to prevent oxidation of the internal materials.
[0015] 2. This invention features three independent chambers for pre-processing various raw materials. Each chamber has an internal insulation jacket, through which heated heat transfer oil is circulated to preheat the materials inside. Simultaneously, electric three-way valves on the sides of each chamber, combined with internal temperature sensors, provide feedback and dynamically adjust the returning heat transfer oil, thereby achieving precise temperature control within each chamber. This eliminates the need for individual adjustments to the heat transfer oil entering each chamber, simplifying operation, saving costs, and addressing the issue of temperature overshoot caused by reliance on a single heat source in traditional equipment. It enables precise temperature control by zone, ensuring the stability of the cooling process.
[0016] 3. This invention collects the high-temperature exhaust gas inside the mixing and processing chamber by setting an exhaust pipe at the top of the mixing and processing chamber and introduces it into the waste heat recovery box, thereby capturing the exhaust heat of the mixing host, realizing the preheating operation of air and inert gas, and reducing the energy consumption and ineffective heat loss of aggregate heating. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure at point A.
[0019] Figure 3 For the present invention Figure 2 Detailed schematic diagram of the structure on the right.
[0020] Figure 4 For the present invention Figure 2 Detailed structural diagram at point B.
[0021] Figure 5 For the present invention Figure 2 Detailed structural diagram at point C.
[0022] Figure 6 For the present invention Figure 2 Detailed structural diagram at point D.
[0023] Figure 7 For the present invention Figure 3 Detailed structural diagram at point E.
[0024] Figure 8 For the present invention Figure 3 Detailed structural diagram at point F.
[0025] The attached figures are labeled as follows: 1. Mixing and processing chamber; 11. Inert gas inlet of processing chamber; 111. Preheated air inlet of processing chamber; 12. Discharge port of processing chamber; 121. Discharge hydraulic rod of processing chamber; 122. Hydraulic rod base of processing chamber; 13. Insulation jacket of processing chamber; 131. Heat-conducting ring of processing chamber; 14. Exhaust pipe of processing chamber; 141. Exhaust motor; 15. Top plate of processing chamber; 151. Outer mixing arm ring frame; 152. Mixing motor of processing chamber; 153. Transmission gear of processing chamber; 154. Discharge hydraulic arm of premixing chamber; 155. Hydraulic arm base of premixing chamber; 6. Outer ring stirring arm; 161. Stirring fork; 162. Scraper on inner wall of processing chamber; 17. Stirring screw of processing chamber; 171. Spiral plate; 18. Electric tee for oil return of processing chamber; 181. Motor of tee for processing chamber; 182. Oil return port of processing chamber; 19. Oil inlet of processing chamber; 2. Preheating and premixing chamber; 21. Top plate of premixing chamber; 211. Vent valve of premixing chamber; 212. Feed port of premixing chamber; 22. Insulation jacket of premixing chamber; 221. Heat-conducting ring of premixing chamber; 23. Oil inlet of premixing chamber; 24. Oil return tee valve of premixing chamber; 241. Motor of oil return of premixing chamber; 242 1. Premix bin return oil port; 25. Premix bin mixing shaft; 251. Premix bin mixing fork; 26. Premix bin air inlet three-way valve; 261. Premix bin inert air port; 262. Premix bin preheating air port; 263. Premix bin air inlet conversion motor; 27. Premix bin motor base; 271. Premix bin mixing motor; 3. Asphalt constant temperature temporary storage bin; 31. Temporary storage bin return oil tee; 311. Temporary storage bin return oil port; 312. Temporary storage bin oil inlet; 313. Temporary storage bin return oil tee motor; 32. Temporary storage bin top plate; 321. Annular channel; 322. Temporary storage bin feed inlet; 3 23. Temporary storage bin mixing motor base; 324. Temporary storage bin mixing motor; 33. Temporary storage bin mixing shaft; 331. Premix bin mixing fork; 34. Temporary storage bin insulation jacket; 341. Temporary storage bin heat-conducting ring plate; 35. Asphalt pump; 351. Asphalt pump motor; 352. Asphalt feed pipe; 36. Temporary storage bin inert gas pipe; 4. Main support frame; 41. Top plate; 42. Support plate; 421. Inert gas storage tank; 43. Bottom plate; 5. Waste heat recovery box; 51. Air preheating pipe; 52. Inert gas preheating pipe; 53. Heat exchanger plate; 54. Processing bin exhaust gas inlet. Detailed Implementation
[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The temperature-controlled mixing equipment for asphalt mixture preparation involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] Reference Figure 1 , Figure 3 and Figure 8 This invention provides a temperature-controlled mixing device for asphalt mixture preparation. The mixing chamber 1 has an inert gas inlet 11 on its top front side and a preheating air inlet 111 on its front side. A bottom plate 43 is fixedly connected to the bottom of the mixing chamber 1. A support plate 42 is fixedly connected to the middle of the mixing chamber 1. A top plate 41 is fixedly connected to the top of the mixing chamber 1. A hydraulic rod base 122 is fixedly connected to the top of the top plate 41. A discharge hydraulic rod 121 is connected to the side of the hydraulic rod base 122. A discharge port 12 is movably connected to the end of the discharge hydraulic rod 121. A heat insulation jacket 13 is provided inside the wall of the mixing chamber 1. A heat-conducting ring 131 is fixedly connected inside the heat insulation jacket 13. An exhaust pipe 14 is fixedly connected to the top side of the mixing chamber 1. An exhaust motor 141 is fixedly connected to the side. A processing chamber top plate 15 is provided on the inner side of the top of the mixing and processing chamber 1. An outer mixing arm ring frame 151 is provided inside the processing chamber top plate 15. A processing chamber transmission gear 153 is provided on the top of the processing chamber top plate 15. A premixing chamber hydraulic arm base 155 is fixedly connected to the top of the processing chamber top plate 15. A premixing chamber unloading hydraulic arm 154 is provided on the side of the premixing chamber hydraulic arm base 155. An outer ring mixing arm 16 is fixedly connected to the bottom of the outer mixing arm ring frame 151. A processing chamber mixing screw 17 is provided in the middle of the mixing and processing chamber 1. A processing chamber oil return electric tee 18 is provided on the top side of the mixing and processing chamber 1. A processing chamber oil inlet 19 is provided at the bottom of the processing chamber oil return electric tee 18. A preheating premixing chamber 2 is fixedly connected to the top of the mixing and processing chamber 1. An asphalt constant temperature temporary storage chamber 3 is fixedly connected to the top of the top plate 41. A waste heat recovery box 5 is fixedly connected to the top of the support plate 42.
[0028] Reference Figure 8 The outer ring stirring arm 16 is fixedly connected to the rear side of the inner wall scraper 162 of the processing chamber, the outer ring stirring arm 16 is fixedly connected to the front side of the stirring fork 161, the processing chamber stirring screw 17 is fixedly connected to the side of the spiral plate 171, the processing chamber oil return electric tee 18 is fixedly connected to the side of the processing chamber oil return port 182, and the processing chamber tee motor 181 is fixedly connected to the rear side of the processing chamber oil return electric tee 18.
[0029] The mixing fork 161 and the spiral plate 171 work together to mix the materials inside the mixing and processing chamber 1. The scraper 162 on the inner wall of the processing chamber 1, which is set on the outer ring mixing arm 16, scrapes out the materials adhering to the inner wall of the mixing and processing chamber 1, reducing internal residues and preventing excessive material from adhering to the inner wall for a long time, which would cause errors in subsequent material processing and improve processing accuracy.
[0030] Reference Figure 6 The top of the preheating and premixing chamber 2 is fixedly connected to a premixing chamber top plate 21. The middle of the premixing chamber top plate 21 is fixedly connected to a premixing chamber motor base 27. The rear side of the premixing chamber motor base 27 is fixedly connected to a premixing chamber stirring motor 271. The side of the premixing chamber motor base 27 is provided with a premixing chamber air inlet three-way valve 26. The top of the premixing chamber air inlet three-way valve 26 is provided with a premixing chamber preheating air port 262. The side of the premixing chamber air inlet three-way valve 26 is fixedly connected to a premixing chamber inert air port 261. The rear side of the premixing chamber air inlet three-way valve 26 is fixedly connected to a premixing chamber air inlet conversion motor 263. The bottom of the premixing chamber motor base 27 is fixedly connected to a premixing chamber stirring shaft 25. The side of the premixing chamber stirring shaft 25 is fixedly connected to a premixing chamber stirring fork 251.
[0031] The internal temperature is monitored in real time by an internal temperature sensor. When the temperature is too high, the gas entering the preheating premixing chamber 2 is switched through the premixing chamber air inlet three-way valve 26 to block the air from entering and fill it with preheated inert gas, thereby preventing the material inside from aging and ensuring the quality of pretreatment. The premixing chamber mixing fork 251 continuously mixes the material thoroughly, so that the two aggregates are fully mixed according to the proportion in the pretreatment stage, so that they can be better mixed with the pretreated asphalt in the subsequent main processing stage.
[0032] Reference Figure 7 The top of the premixing chamber top plate 21 is provided with a premixing chamber vent valve 211, and the top of the premixing chamber top plate 21 is provided with a premixing chamber feed port 212. The top side of the preheating premixing chamber 2 is provided with a premixing chamber oil return three-way valve 24, and the side of the premixing chamber oil return three-way valve 24 is fixedly connected with a premixing chamber oil return port 242. The rear side of the premixing chamber oil return three-way valve 24 is fixedly connected with a premixing chamber oil return motor 241. The bottom side of the preheating premixing chamber 2 is provided with a premixing chamber oil inlet 23.
[0033] Preheated heat transfer oil is introduced into the insulation jacket inside the preheating premixing silo 2 through the premixing silo inlet 23 to preheat the aggregate inside the preheating premixing silo 2. A three-way valve is installed at the return oil port to precisely control the return heat transfer oil. The return heat transfer oil is then introduced back to the premixing silo inlet 23 through the three-way valve to adjust the temperature inside the preheating premixing silo 2 and ensure dynamic temperature adjustment.
[0034] Reference Figure 1 and Figure 2The top side of the asphalt constant temperature temporary storage bin 3 is fixedly connected to a temporary storage bin oil return tee 31. The front side of the temporary storage bin oil return tee 31 is provided with a temporary storage bin oil return port 311. The side of the temporary storage bin oil return tee 31 is fixedly connected to a temporary storage bin oil return tee motor 313. The bottom side of the asphalt constant temperature temporary storage bin 3 is provided with a temporary storage bin oil inlet 312. The bottom of the asphalt constant temperature temporary storage bin 3 is fixedly connected to an asphalt pump 35. The rear side of the asphalt pump 35 is fixedly connected to an asphalt pump motor 351. The bottom of the asphalt pump 35 is provided with an asphalt feed pipe 352. The top side of the asphalt constant temperature temporary storage bin 3 is provided with a temporary storage bin inert gas pipe 36.
[0035] The temperature of the asphalt constant temperature storage bin 3 is dynamically adjusted by combining the temporary storage bin return oil tee 31 on the side of the storage bin 3 with the internal temperature sensor. The temporary storage bin 3 is equipped with an inert gas pipe 36 on the top side of the asphalt constant temperature storage bin 3 to fill the interior of the asphalt constant temperature storage bin 3 with inert gas, thereby preventing the denaturation of the asphalt. The asphalt preheated by the asphalt pump 35 at the bottom is precisely introduced into the processing bin to accurately control the raw material ratio and ensure the processing quality.
[0036] Reference Figure 4 The top of the asphalt constant temperature temporary storage silo 3 is fixedly connected to a temporary storage silo top plate 32. The interior of the temporary storage silo top plate 32 has an annular channel 321. The top of the temporary storage silo top plate 32 has a temporary storage silo inlet 322. The top of the temporary storage silo top plate 32 is fixedly connected to a temporary storage silo mixing motor base 323. The rear side of the temporary storage silo mixing motor base 323 is fixedly connected to a temporary storage silo mixing motor 324. The bottom of the temporary storage silo mixing motor base 323 is fixedly connected to a temporary storage silo mixing shaft 33. The side of the temporary storage silo mixing shaft 33 is fixedly connected to a premixing silo mixing fork 331. The interior of the asphalt constant temperature temporary storage silo 3 has a temporary storage silo insulation jacket 34. The interior of the temporary storage silo insulation jacket 34 has a temporary storage silo heat-conducting ring plate 341 fixedly connected to the temporary storage silo heat-conducting ring plate 341. Through the continuous stirring action of the temporary storage silo mixing shaft 33, the asphalt is fully preheated.
[0037] Reference Figure 2 An inert gas storage tank 421 is fixedly connected to the top of the support plate 42, and a hydraulic rod base 122 for the processing chamber is fixedly connected to the top of the base plate 43.
[0038] Reference Figure 5 The waste heat recovery box 5 has a heat exchange plate 53 fixedly connected inside. An air preheating pipe 51 is provided in the middle of the heat exchange plate 53. An inert gas preheating pipe 52 is provided in the middle of the heat exchange plate 53. The waste heat recovery box 5 has a processing chamber exhaust gas inlet 54 fixedly connected to its side.
[0039] The waste heat recovery box 5 collects the high-temperature waste gas generated during the operation of the mixing and processing chamber 1, thereby enabling the preheating of the air and inert protective gas required by other chambers, and thus reducing the energy consumption and ineffective heat loss of aggregate heating.
[0040] The working principle of this invention is as follows: The waste heat recovery box 5 set on the upper part of the support plate 42 preheats the gas required in the working process. Specifically, the high temperature waste gas generated inside the stirring and processing chamber 1 is introduced into the waste heat recovery box 5 through the processing chamber exhaust pipe 14. The heat exchange fins 53 arranged in a staggered manner accelerate the preheating of the gas inside the air preheating pipe 51 and the inert gas preheating pipe 52. Then, the preheated gas is introduced into the air inlet of each chamber, and the valve body is used to switch between different gases.
[0041] In the RAP recycled material pretreatment stage, new aggregate and RAP recycled material treated with inert gas are conveyed into the preheating premixing silo 2 through the premixing silo feed port 212 on the top plate 21 of the premixing silo. The premixing silo air intake conversion motor 263 at the top of the premixing silo 21 switches the premixing silo air intake three-way valve 26 to preheating air mode, thereby closing the premixing silo preheating air port 262 and introducing air preheated by the waste heat recovery box 5 into the preheating premixing silo 2. At the same time, heat transfer oil is introduced into the premixing silo insulation jacket 22 through the premixing silo oil inlet 23. The heat transfer ring plate 221 set inside the premixing silo insulation jacket 22 accelerates the heating of the RAP recycled material and heat transfer oil inside the premixing silo 2. Simultaneously, the premixing chamber oil return three-way valve 24, located above the premixing chamber oil inlet 23, controls the return oil volume of the premixing chamber oil return port 242 according to the internal temperature change of the preheating premixing chamber 2. The premixing chamber oil return three-way valve 24 precisely controls the quantitative flow of heat transfer oil that has completed heat exchange from the premixing chamber insulation jacket 22 back into the premixing chamber oil inlet 23. The temperature inside the preheating premixing chamber 2 is precisely adjusted according to the mixing of high-temperature heat transfer oil and low-temperature heat transfer oil. The premixing chamber stirring shaft 25 inside the preheating premixing chamber 2 drives the premixing chamber stirring fork 251 to stir the RAP recycled material and new aggregate, achieving preliminary uniform mixing of new aggregate and RAP recycled material to form a gradation base.
[0042] During the high-temperature protection stage of RAP recycled materials, the internal material temperature is monitored in real time by a temperature sensor inside the preheating and premixing silo 2. When the internal temperature of the preheating and premixing silo 2 rises abnormally, the preheating air passage is closed by the premixing silo air inlet three-way valve 26 at the top of the premixing silo top plate 21, and the preheating air port 262 of the premixing silo is opened to introduce inert gas preheated by the waste heat recovery box 5 into the preheating and premixing silo 2. At the same time, the premixing silo oil return three-way valve 24 on the side adjusts the return oil volume of the heat transfer oil to reduce the internal temperature of the preheating and premixing silo 2 and prevent the aging of RAP recycled materials.
[0043] During the asphalt pre-storage stage, the required asphalt is stored inside the asphalt constant temperature temporary storage chamber 3. Heat transfer oil is introduced into the insulation jacket 34 of the temporary storage chamber through the oil inlet 312 at the bottom of the temporary storage chamber 3. After heat exchange inside the insulation jacket 34, the heat transfer oil flows out through the oil return tee 31 at the top of the temporary storage chamber 3. The return oil volume is adjusted by the combined action of the temperature sensor inside the temporary storage chamber 3 and the motor 313 of the oil return tee, thereby precisely adjusting the internal temperature of the temporary storage chamber 3. At the same time, inert gas, which has been preheated by the waste heat recovery box 5, continuously enters the temporary storage chamber 3 through the inert gas pipe 36, achieving zero oxidation of the modifier and ensuring the composite modification effect. Subsequently, according to the ratio, the amount of asphalt entering the mixing and processing chamber 1 is precisely controlled by the asphalt pump 35.
[0044] In the main processing stage, the pre-treated premixed material enters the mixing and processing chamber 1 through the operation of the premix chamber discharge hydraulic arm 154 at the bottom of the preheating premix chamber 2. The asphalt pump 35 set on the side of the mixing and processing chamber 1 simultaneously transports the modified asphalt into the mixing and processing chamber 1. Under the action of the outer ring mixing arm 16 and the mixing screw 17 of the processing chamber, the two are mixed and processed. At the same time, the internal temperature of the mixing and processing chamber 1 is adjusted synchronously through the processing chamber return oil electric tee 18 and the processing chamber oil inlet 19 set on the side. When the internal temperature exceeds the set temperature, the processing chamber inert gas inlet 11 is closed and the processing chamber preheating air inlet 111 is opened to block the oxidation reaction.
[0045] During the unloading stage, after processing is completed, the material is unloaded through the unloading port 12 at the bottom of the mixing and processing chamber 1.
[0046] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.
[0047] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A temperature-controlled mixing device for preparing asphalt mixtures, comprising a mixing and processing chamber (1), characterized in that: The mixing and processing chamber (1) has an inert gas inlet (11) on its top front side and a preheated air inlet (111) on its front side. A bottom plate (43) is fixedly connected to the bottom of the mixing and processing chamber (1). A support plate (42) is fixedly connected to the middle of the mixing and processing chamber (1). A top plate (41) is fixedly connected to the top of the mixing and processing chamber (1). A hydraulic rod base (122) is fixedly connected to the top of the top plate (41). A processing chamber unloading hydraulic rod (121) is connected to the side of the base (122). The end of the processing chamber unloading hydraulic rod (121) is movably connected to the processing chamber unloading port (12). A processing chamber insulation jacket (13) is provided inside the wall of the mixing processing chamber (1). A processing chamber heat-conducting ring plate (131) is fixedly connected inside the processing chamber insulation jacket (13). A processing chamber exhaust pipe (14) is fixedly connected to the top side of the mixing processing chamber (1). An exhaust motor (14) is fixedly connected to the side of the processing chamber exhaust pipe (14). 1) A processing chamber top plate (15) is provided on the inner side of the top of the mixing and processing chamber (1). An outer mixing arm ring frame (151) is provided inside the processing chamber top plate (15). A processing chamber transmission gear (153) is provided on the top of the processing chamber top plate (15). A premixing chamber hydraulic arm base (155) is fixedly connected to the top of the processing chamber top plate (15). A premixing chamber unloading hydraulic arm (154) is provided on the side of the premixing chamber hydraulic arm base (155). An outer mixing arm ring frame (151) is fixedly connected to the bottom of the outer mixing arm ring frame (151). The mixing arm (16) is arranged in the middle of the mixing and processing chamber (1), the processing chamber mixing screw (17) is arranged in the middle of the mixing and processing chamber (1), the processing chamber oil return electric tee (18) is arranged on the top side of the mixing and processing chamber (1), the processing chamber oil inlet (19) is arranged at the bottom of the processing chamber oil return electric tee (18), the top of the mixing and processing chamber (1) is fixedly connected to the preheating and premixing chamber (2), the top of the top plate (41) is fixedly connected to the asphalt constant temperature temporary storage chamber (3), and the top of the support plate (42) is fixedly connected to the waste heat recovery box (5).
2. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: The outer ring stirring arm (16) is fixedly connected to the rear side of the inner wall scraper (162) of the processing chamber, the outer ring stirring arm (16) is fixedly connected to the front side of the stirring fork (161), the processing chamber stirring screw (17) is fixedly connected to the side of the spiral plate (171), the processing chamber oil return port (182) is fixedly connected to the side of the processing chamber oil return electric tee (18), and the processing chamber tee motor (181) is fixedly connected to the rear side of the processing chamber oil return electric tee (18).
3. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: The top of the preheating and premixing chamber (2) is fixedly connected to a premixing chamber top plate (21), and a premixing chamber motor base (27) is fixedly connected to the middle of the premixing chamber top plate (21). A premixing chamber stirring motor (271) is fixedly connected to the rear side of the premixing chamber motor base (27). A premixing chamber air inlet three-way valve (26) is provided on the side of the premixing chamber motor base (27), and a premixing chamber air inlet three-way valve (26) is provided on the top of the premixing chamber air inlet three-way valve (26). A preheating air inlet (262) is provided. A premixing chamber inert air inlet (261) is fixedly connected to the side of the premixing chamber air inlet three-way valve (26). A premixing chamber air inlet conversion motor (263) is fixedly connected to the rear side of the premixing chamber air inlet three-way valve (26). A premixing chamber stirring shaft (25) is fixedly connected to the bottom of the premixing chamber motor base (27). A premixing chamber stirring fork (251) is fixedly connected to the side of the premixing chamber stirring shaft (25).
4. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 3, characterized in that: The top of the premixing chamber top plate (21) is provided with a premixing chamber vent valve (211), the top of the premixing chamber top plate (21) is provided with a premixing chamber feed port (212), the top side of the preheating premixing chamber (2) is provided with a premixing chamber oil return three-way valve (24), the side of the premixing chamber oil return three-way valve (24) is fixedly connected with a premixing chamber oil return port (242), the rear side of the premixing chamber oil return three-way valve (24) is fixedly connected with a premixing chamber oil return motor (241), and the bottom side of the preheating premixing chamber (2) is provided with a premixing chamber oil inlet (23).
5. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: The top side of the asphalt constant temperature temporary storage chamber (3) is fixedly connected to a temporary storage chamber oil return tee (31), the front side of the temporary storage chamber oil return tee (31) is provided with a temporary storage chamber oil return port (311), the side of the temporary storage chamber oil return tee (31) is fixedly connected to a temporary storage chamber oil return tee motor (313), the bottom side of the asphalt constant temperature temporary storage chamber (3) is provided with a temporary storage chamber oil inlet (312), the bottom of the asphalt constant temperature temporary storage chamber (3) is fixedly connected to an asphalt pump (35), the rear side of the asphalt pump (35) is fixedly connected to an asphalt pump motor (351), the bottom of the asphalt pump (35) is provided with an asphalt feed pipe (352), and the top side of the asphalt constant temperature temporary storage chamber (3) is provided with a temporary storage chamber inert gas pipe (36).
6. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: The top of the asphalt constant temperature temporary storage bin (3) is fixedly connected to a temporary storage bin top plate (32). An annular channel (321) is opened inside the temporary storage bin top plate (32). A temporary storage bin inlet (322) is opened at the top of the temporary storage bin top plate (32). A temporary storage bin mixing motor base (323) is fixedly connected to the top of the temporary storage bin top plate (32). A temporary storage bin mixing motor (324) is fixedly connected to the rear side of the temporary storage bin mixing motor base (323). A temporary storage bin mixing shaft (33) is fixedly connected to the bottom of the temporary storage bin mixing motor base (323). A premix bin mixing fork (331) is fixedly connected to the side of the temporary storage bin mixing shaft (33). A temporary storage bin insulation jacket (34) is opened inside the asphalt constant temperature temporary storage bin (3). A temporary storage bin heat-conducting ring plate (341) is fixedly connected inside the temporary storage bin insulation jacket (34).
7. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: An inert gas storage tank (421) is fixedly connected to the top of the support plate (42), and a processing chamber hydraulic rod base (122) is fixedly connected to the top of the base plate (43).
8. The temperature-controlled mixing equipment for preparing asphalt mixtures according to claim 1, characterized in that: The waste heat recovery box (5) is fixedly connected to a heat exchange plate (53). An air preheating pipe (51) is provided in the middle of the heat exchange plate (53). An inert gas preheating pipe (52) is provided in the middle of the heat exchange plate (53). A processing chamber exhaust gas inlet (54) is fixedly connected to the side of the waste heat recovery box (5).