An anti-oil erosion asphalt mixture production device and production method

Abstract

The application discloses an anti-oil erosion asphalt mixture production equipment and a production method, and relates to the technical field of raw material processing. The equipment comprises a base, the top of the base is provided with a cover body, a feeding opening is formed in the middle of the top of the cover body, and a cylinder body is arranged on the two sides of the cover body. The cover body and the cylinder body are combined to form a mixing tank body. An outer circulation assembly is arranged at one end of the top of the cover body. A mixing assembly is arranged in the middle of the first baffle and the second baffle. The mixing assembly comprises a material suction head, an annular upper material suction opening, a bottom lower material suction opening and a built-in second heat pipe. The outer circulation double-screw pump and the material distribution return pipeline are matched to solve the problem of uneven mixing of the oil stain resistance agent. The second heat pipe is used to heat the material suction head and the heat conduction block to realize high-temperature melting. The height difference between the upper and lower material suction openings is used to synchronously suck the base asphalt and the melted oil stain resistance agent. After high-temperature premixing in the mixing cavity, the outer circulation pipeline is used for return and re-mixing. The oil stain resistance agent fully wraps the asphalt molecules to form a dense oil-resistant protective layer, and the uniformity of the mixture in resisting oil erosion is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of raw material processing technology, specifically to an oil-resistant asphalt mixture production equipment and production method. Background Technology

[0002] In areas such as highway transportation hubs, gas stations, parking lots, and industrial and mining enterprise areas, asphalt pavements have long faced the problem of oil erosion from vehicle drippings and industrial grease seepage. As an organic cementitious material, asphalt is prone to swelling and softening reactions with oil, leading to a decrease in the bonding performance and strength of the mixture. This, in turn, causes early-stage damage such as pavement loosening, potholes, and spalling, significantly shortening the service life of the pavement. Currently, conventional asphalt mixtures lack targeted anti-oil erosion designs, and existing anti-oil technologies often suffer from poor adaptability, excessive costs, or limited performance improvements, making it difficult to meet the long-term service needs of pavements in oil-polluted areas. Therefore, developing asphalt mixture technologies that combine excellent anti-oil erosion performance with conventional road performance to solve the problems of easy damage and frequent maintenance of pavements in oil-polluted areas has become an urgent need in the field of pavement engineering.

[0003] Asphalt is a complex polymer mixture composed of four components: saturated components, aromatic components, resins, and asphaltenes. Chemically, it mainly consists of alkanes, cycloalkanes, aromatic hydrocarbons, and their derivatives, and is readily soluble in organic solvents such as gasoline and diesel. During use, asphalt concrete pavements inevitably encounter fuel leaks from vehicles, leading to erosion of the asphalt concrete. The asphalt dissolves, the asphalt film peels off the aggregate surface, the mixture loosens, and aggregate particles are carried away by traffic, leaving potholes. Therefore, oil erosion resistance is a crucial performance indicator for road asphalt concrete. Identifying oil erosion damage is quite simple; it generally exhibits the following characteristics: Main manifestations include decreased adhesion between asphalt and aggregate, sometimes even complete detachment of the asphalt film from the aggregate surface, softening of the mixture, and decreased load-bearing capacity. The damage process begins with softening within the eroded area, asphalt is squeezed towards the surface. Simultaneously, due to decreased adhesion between asphalt and aggregate, the mixture loosens under the vacuum of vehicles, and aggregates quickly detach from the pavement surface, ultimately forming potholes. The main forms of damage are softening, loosening, and pothole formation.

[0004] To achieve rapid and effective dissolution of anti-oil stain agent powder in SBS asphalt, the new anti-oil stain agent can be directly added during asphalt mixture production or pre-dissolved in SBS asphalt before mixing. However, direct addition has poor effect, while pre-dissolving in SBS asphalt before mixing requires solving the problem of rapid and effective dissolution of the anti-oil stain agent powder. However, asphalt is relatively viscous, and the anti-oil stain agent powder tends to float on the surface of the asphalt layer without dissolving or dissolving insufficiently. This leads to uneven distribution of the anti-oil stain agent in the asphalt system, unstable modification effect, difficulty in fully exerting its anti-oil stain performance, and even affecting the overall road performance and workability of the asphalt mixture.

[0005] Therefore, it is necessary to invent an oil-resistant asphalt mixture production equipment to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an equipment and method for producing oil-resistant asphalt mixtures, solving the problem that asphalt is viscous and the anti-oil agent powder tends to float on the surface of the asphalt layer and does not dissolve sufficiently.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: an oil-resistant asphalt mixture production equipment and production method, including a base, a cover body provided on the top of the base, a feeding port provided in the middle of the top of the cover body, cylinder bodies provided on both sides of the cover body, the cover body and the cylinder bodies combined to form a tank for mixing materials, and an external circulation component provided at one end of the top of the cover body;

[0008] The external circulation assembly includes a twin-screw pump fixedly installed on the top of the cover, and the input end of the twin-screw pump is provided with a first connecting pipe;

[0009] A first baffle and a second baffle are fixedly installed at the upper two ends of the inside of the cover, and a mixing component is provided in the middle of the first baffle and the second baffle.

[0010] The mixing assembly includes a suction head, an annular cavity is formed inside the suction head, a second heat pipe is disposed inside the annular cavity, a mixing chamber is formed at the bottom of the suction head, a lower suction port is formed at the bottom center of the mixing chamber, and multiple upper suction ports communicating with the mixing chamber are formed at the top of the suction head.

[0011] The top of the suction head is connected to the first connecting pipe, and a heat-conducting block is fixedly installed on the outer periphery of the suction head. The suction head and the heat-conducting block are heated by the second heat pipe to accelerate the melting of the anti-oil stain agent particles floating above the tank. Utilizing the height difference between the lower suction port and the upper suction port, while sucking the bottom asphalt material, the melted anti-oil stain agent particles at the top are simultaneously adsorbed through the annular upper suction port. The two are premixed at high temperature in the mixing chamber to form a uniform intermediate material, which provides a basis for subsequent mixing and improves the oil stain erosion resistance and structural stability of the mixture.

[0012] Furthermore, a connecting post is fixedly installed on the top of the suction head, and the top end of the connecting post is fixedly connected to the cover. The equivalent aperture of the multiple upper suction ports is the same as the aperture of the lower suction port.

[0013] Furthermore, the output end of the twin-screw pump is fixedly connected to a second connecting pipe, the input end of the second connecting pipe is fixedly connected to a material distribution box, the bottom of the material distribution box is fixedly connected to a support base, the bottom of the support base is fixedly connected to the top of the cover, and discharge pipes are symmetrically fixedly connected to one side of the material distribution box. The input ends of the two discharge pipes are connected to the bottom sides of one end of the cover.

[0014] Furthermore, a drive motor is fixedly installed at one top end of the base, and a drive rod is fixedly connected to the output end of the drive motor. Both ends of the drive rod are movably connected to the cover. A stirring paddle is provided on the outer circumferential surface of the drive rod. A bearing seat is rotatably connected to the end of the drive rod away from the drive motor. A support plate is fixedly connected to the bottom of the bearing seat. The support plate is fixedly connected to one end of the cover.

[0015] Furthermore, limit blocks are symmetrically provided on both sides of the bottom center of the cylinder, and a discharge port is symmetrically provided in the bottom center of the cylinder. A feeding component for controlling the opening and closing of the discharge port is provided in the top center of the base.

[0016] Furthermore, the feeding assembly includes hydraulic telescopic cylinders symmetrically arranged on both sides of the limiting block. The mounting ends of the two hydraulic telescopic cylinders are fixedly connected to the inner side of the base. The telescopic ends of the two hydraulic telescopic cylinders are hinged to connecting arms. The two connecting arms are hinged to connecting rods. The two connecting rods movably pass through the limiting block. Connecting blocks are fixedly connected to the outer peripheral surfaces of the two connecting rods. Baffles are fixedly installed on the top of the two connecting blocks. The two baffles are attached to the surface of the discharge port.

[0017] Furthermore, heating plates are symmetrically arranged at both ends of the bottom of the cylinder. The tops of the two heating plates are attached to the bottom ends of the cylinder. Both sides of the two heating plates are fixedly connected to the inner side of the base. Rectangular grooves are opened inside the two heating plates. A cover plate is provided at one end of the rectangular groove of the two heating plates. A first heat pipe is provided on one side of the cover plate and inserted into the rectangular groove.

[0018] Furthermore, a controller body is fixedly installed on one side of the support base. The controller body is connected to the second heat pipe and the first heat pipe wires, and the controller body is electrically connected to the drive motor.

[0019] A method for producing oil-resistant asphalt mixture includes the following steps:

[0020] S1: First, asphalt and cement are injected into the tank through the feeding port. Since the asphalt slurry formed after mixing asphalt and mineral powder is soaked in gasoline, the asphalt dissolves and the mineral powder is easily lost. Therefore, cement is used as the filler instead of traditional mineral powder. Cement plays the role of inorganic activator and curing agent. After mixing, cement is cured and not easily lost, which further prevents the asphalt mixture from becoming loose after being soaked in gasoline.

[0021] S2: The controller starts the drive motor, which in turn drives the drive roller and stirring paddle to rotate, thus mixing the asphalt and cement in the tank. Simultaneously, the controller activates the power supply to the second and first heat pipes, heating the heating plate and suction head. Once the designated temperature is reached, an anti-oil agent composed of oxidized polyethylene (OPE) is added to the tank through the feeding port. Dissolving OPE in the SBS-modified asphalt enhances the asphalt's viscosity and also encapsulates the asphalt molecules, preventing direct contact with gasoline.

[0022] S3: The anti-oil agent is a white crystalline granule. Due to the high viscosity of asphalt, the anti-oil agent powder tends to float on the surface of the asphalt layer without dissolving or dissolving completely. This causes the anti-oil agent to float at the top of the tank. At this point, the twin-screw pump is started by the controller, which generates suction at the lower and upper suction ports connected to the first connecting pipe. This generates a very strong suction. Since the suction head is inserted into the asphalt, but the top is close to the floating anti-oil agent, under the action of suction, the lower suction port adsorbs the asphalt that has not been fully mixed with the anti-oil agent and enters the mixing chamber. At the same time, the top annular... Multiple upper suction ports draw in the anti-oil agent floating on top and bring it into the mixing chamber. Simultaneously, as the suction head is heated to a fixed temperature, the anti-oil agent dissolves. The anti-oil agent drawn in through the upper suction ports is directly dissolved under high temperature and undergoes initial mixing with the asphalt in the mixing chamber. The initially mixed asphalt is then pumped by a twin-screw pump through the second connecting pipe into the distribution box, thus achieving secondary mixing. Finally, the mixed asphalt is transported through the discharge pipe to the heating area at the bottom of the tank, thus completing the thorough mixing of the asphalt and the anti-oil agent.

[0023] The present invention has the following beneficial effects:

[0024] 1. By utilizing the combined closed-loop structure of the suction head, annular upper suction port, bottom lower suction port, built-in second heat pipe, external circulation twin-screw pump, and distribution and return pipeline, this system precisely addresses the industry pain points of white crystalline OPE anti-oil stain agent, which, due to its lower density than viscous asphalt, floats on the surface of the material layer, agglomerates, melts slowly, and is unevenly mixed. The second heat pipe targets and heats the suction head and heat-conducting block to achieve high-temperature melting. The height difference between the upper and lower suction ports simultaneously draws in the base asphalt and melted anti-oil stain agent. After high-temperature premixing in the mixing chamber, the mixture is returned and remixed at the bottom of the tank via the external circulation pipeline. This eliminates material stratification and localized enrichment, ensuring the anti-oil stain agent fully encapsulates asphalt molecules, forming a dense, oil-resistant protective layer. This significantly improves the uniformity of the mixture's resistance to oil erosion, the stability of its modification, and the overall consistency of its performance.

[0025] 2. By using 425 cement to replace traditional mineral powder in the optimized matrix formula, combined with the synergistic effects of constant temperature heating in the tank, closed mixing, and forced convection stirring, this method specifically addresses the technical defects of traditional asphalt and mineral powder binders, such as poor oil resistance, rapid dissolution of asphalt after soaking in gasoline, loss and disintegration of mineral powder, and loose and peeling of the mixture structure. 425 cement acts as both an inorganic curing agent and an activator, forming a high-strength, oil-resistant skeleton after mixing and curing. It firmly binds the asphalt components and is not easily eroded or lost by gasoline. Combined with the constant temperature and closed mixing environment, it ensures the fluidity of the asphalt and the full reaction of the formula. From the dual dimensions of raw material modification and mixing process, it simultaneously improves the structural strength, oil resistance, and anti-loosening ability of the mixture, effectively extending the service life of asphalt mixtures in oily environments.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram showing the overall internal side structure of the present invention;

[0029] Figure 3 This is a top view of the overall internal structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the mixing assembly of the present invention;

[0031] Figure 5 This is a cross-sectional view of the mixing assembly of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the cover and the cylinder of the present invention;

[0033] Figure 7 This is a schematic diagram of the external circulation component of the present invention;

[0034] Figure 8 This is a schematic diagram of the material feeding assembly of the present invention;

[0035] Figure 9 This is a schematic diagram of the heating plate of the present invention.

[0036] In the diagram: 1. Base; 2. Cover; 201. First baffle; 202. Second baffle; 203. Feed port; 204. Bearing seat; 205. Support plate;

[0037] 3. Cylinder body; 301. Limiting block; 302. Discharge port; 303. Heating plate; 304. Cover plate; 305. First heat pipe;

[0038] 4. Drive motor; 401. Drive roller; 402. Stirring paddle;

[0039] 5. Discharge assembly; 501. Hydraulic telescopic cylinder; 502. Connecting arm; 503. Connecting rod; 504. Connecting block; 505. Baffle plate;

[0040] 6. External circulation assembly; 601. Twin screw pump; 602. First connecting pipe; 603. Second connecting pipe; 604. Distribution box; 605. Discharge pipe; 606. Support base;

[0041] 7. Mixing assembly; 701. Suction head; 702. Heat-conducting block; 703. Annular cavity; 704. Second heat pipe; 705. Lower suction port; 706. Mixing chamber; 707. Upper suction port; 708. Connecting column; 8. Controller body. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0044] Please see Figures 1-9This invention provides a technical solution: an oil-resistant asphalt mixture production equipment and method, including a base 1. The base 1 serves as the load-bearing foundation of the entire equipment and is constructed from high-strength, thickened profiles, possessing extremely strong compressive stability and deformation resistance, providing stable installation support for all mixing, heating, and circulation components above. A cover 2 is provided on the top of the base 1, and the cover 2 adopts a sealed sheet metal structure. A feeding port 203 is provided in the middle of the top of the cover 2, which can be used to add raw materials such as asphalt, cement, and oil-resistant agents. Cylinders 3 are provided on both sides of the cover 2. The cover 2 and the cylinders 3 are combined to form a tank for mixing materials. The entire tank is constructed without... The seam splicing process forms a closed and efficient mixing space, which can retain heat to maintain the mixing temperature. An external circulation component 6 is set at one end of the top of the cover body 2. The external circulation component 6 is the core component for realizing the forced circulation premixing of asphalt and anti-oil agent. It realizes the convection of materials between the upper and lower layers through negative pressure suction and pipeline return, breaking the drawback of material stratification in traditional static mixing. It includes a twin screw pump 601 fixedly installed on the top of the cover body 2. The twin screw pump 601 adopts a variable frequency speed regulation structure, which has strong suction and stable flow. The input end of the twin screw pump 601 is equipped with a first connecting pipe 602. The first connecting pipe 602 is a high temperature and corrosion resistant hose with good flexibility and sealing performance.

[0045] Inside the upper part of the cover 2, a first baffle 201 and a second baffle 202 are fixedly installed at both ends. The two baffles are arranged symmetrically to guide and limit the flow of material, preventing floating anti-oil particles from diffusing to the edge of the tank and concentrating them around the mixing component 7, thus improving the adsorption and mixing efficiency. The mixing component 7 is located in the middle of the first baffle 201 and the second baffle 202. The mixing component 7 includes a suction head 701, which is an integrated cast steel structure with a built-in flow channel. It is inserted into the asphalt layer and has the dual functions of bottom asphalt suction and top anti-oil adsorption. The suction head 701 has an annular cavity 703 inside, which provides a dedicated installation space for the second heat pipe 704. This cavity can fix the position of the heat pipe, ensure heating uniformity, and prevent disordered heat loss, allowing the heat energy to be concentrated on the suction head 701. The main body of the device, the second heat pipe 704, is made of a high-efficiency heat-conducting material. After being powered on, it heats up quickly and evenly conducts heat energy to the entire suction head 701, accelerating the melting and decomposition of floating anti-oil stain agent particles. A mixing chamber 706 is opened at the bottom of the suction head 701. The mixing chamber 706 is a closed mixing space. It uses a high-temperature environment to accelerate the initial fusion of asphalt and melted anti-oil stain agent, avoiding the problem of uneven mixing caused by direct backflow of materials. A lower suction port 705 is opened in the middle of the bottom of the mixing chamber 706. The lower suction port 705 is directly opposite the asphalt layer at the bottom of the tank and is responsible for sucking up the base asphalt without anti-oil stain agent, ensuring a continuous supply of base materials. Multiple upper suction ports 707 are opened in a ring at the top of the suction head 701 and are connected to the mixing chamber 706. The ring-arranged upper suction ports 707 are close to the anti-oil stain agent particles floating on the upper layer of the tank, achieving large-area adsorption and reducing particle residue floating.

[0046] The top of the suction head 701 is connected to the first connecting pipe 602 to achieve smooth material transfer and ensure stable transmission of negative pressure suction. A heat-conducting block 702 is fixedly installed on the outer periphery of the suction head 701. The heat-conducting block 702 is made of a high thermal conductivity alloy material to expand the heating area of ​​the suction head 701 and further improve the melting speed of the upper anti-oil agent particles. The second heat pipe 704 heats the suction head 701 and the heat-conducting block 702, thereby accelerating the melting of the anti-oil agent particles floating above the tank and avoiding... To avoid the problems of particle agglomeration and delayed dissolution, the height difference between the lower suction port 705 and the upper suction port 707 is used to create a convection effect of simultaneous suction from both top and bottom. While suctioning the bottom asphalt material, the annular upper suction port 707 simultaneously adsorbs the melted anti-oil agent particles at the top, achieving precise ratio suction of the two materials. The two are premixed at high temperature in the mixing chamber 706 to form a uniform intermediate material, breaking down the material stratification barrier in advance, providing a foundation for subsequent mixing, and greatly improving the mixture's resistance to oil erosion and structural stability.

[0047] A connecting column 708 is fixedly installed on the top of the suction head 701. The top of the connecting column 708 is fixedly connected to the cover 2. The rigid connection ensures the stability of the suction head 701 and avoids displacement or shaking during the suction process. It also ensures accurate alignment of the suction port. The equivalent aperture of the multiple upper suction ports 707 is consistent with the aperture of the lower suction port 705. The suction ratio of asphalt and anti-oil agent is strictly controlled to ensure the accuracy of the premixed material ratio and avoid local concentrations that are too high or too low, which may affect the performance of the mixture.

[0048] The output end of the twin-screw pump 601 is fixedly connected to a second connecting pipe 603. The second connecting pipe 603 is made of high-temperature and pressure resistant pipe material and is responsible for stably conveying the premixed intermediate material to the distribution box 604. The input end of the second connecting pipe 603 is fixedly connected to the distribution box 604. The distribution box 604 has a built-in diversion cavity, which plays a role in buffering and equalizing the material, and evenly diverts the premixed material conveyed by the single channel. The bottom of the distribution box 604 is fixedly connected to a support base 606. The support base 606 adopts a reinforced bracket structure to provide stable support for the distribution box 604. The bottom of the support base 606 is fixedly connected to the top of the cover 2. The two discharge pipes 605 are symmetrically fixedly connected to the bottom of one side of the distribution box 604. The two discharge pipes 605 are symmetrically arranged to directionally convey the premixed material to the heating and mixing area at the bottom of the tank, so as to realize the material circulation and backflow mixing. The input ends of the two discharge pipes 605 are connected to the bottom sides of one end of the cover 2 to ensure that the premixed material directly enters the core mixing area and improves the overall mixing efficiency.

[0049] A drive motor 4 is fixedly installed at one end of the top of the base 1. The drive motor 4 is a variable frequency geared motor, which provides continuous power to the mixing mechanism and is suitable for the mixing requirements of high viscosity asphalt. The output end of the drive motor 4 is fixedly connected to a drive roller 401. The drive roller 401 is a high-strength solid shaft that can withstand the mixing torque and is not easily deformed. Both ends of the drive roller 401 are movably connected to the cover 2, and the connection is sealed to prevent asphalt from seeping into the shaft and causing jamming. A stirring paddle 402 is provided on the outer circumferential surface of the drive roller 401. The stirring paddle 402 adopts a spiral biomimetic structure, which forms axial and... Radial convection breaks down material stratification, allowing asphalt, cement, and anti-oil agent to fully mix. The end of the drive roller 401 furthest from the drive motor 4 is rotatably connected to a bearing seat 204. The bearing seat 204 uses a high-precision sealed bearing to reduce the rotational friction of the shaft, reduce equipment energy consumption, and at the same time ensure the coaxiality of the drive roller 401. A support plate 205 is fixedly connected to the bottom of the bearing seat 204. The support plate 205 is fixedly connected to one end of the cover 2. The support plate 205 plays a role in load-bearing reinforcement, supporting the weight of the bearing seat 204, preventing the end of the drive roller 401 from sagging, and ensuring the stable operation of the mixing mechanism.

[0050] Limiting blocks 301 are symmetrically provided on both sides of the bottom center of the cylinder 3. The limiting blocks 301 adopt a guide structure to provide a limit for the opening and closing parts of the feeding component 5, ensuring that the feeding baffle accurately fits the discharge port 302. The discharge port 302 is symmetrically provided in the bottom center of the cylinder 3. The discharge port 302 adopts a large-diameter symmetrical design. The feeding component 5 for controlling the opening and closing of the discharge port 302 is provided in the top center of the base 1.

[0051] The material discharge assembly 5 adopts a hydraulically driven opening and closing structure, which can precisely control the opening and closing state of the discharge port 302 to avoid premature material leakage or obstructed material discharge. The material discharge assembly 5 includes hydraulic telescopic cylinders 501 symmetrically arranged on both sides of the limit block 301. The mounting ends of the two hydraulic telescopic cylinders 501 are fixedly connected to the inner side of the base 1. The hydraulic telescopic cylinders 501 provide strong opening and closing power. The telescopic ends of the two hydraulic telescopic cylinders 501 are hinged to connecting arms 502. The connecting arms 502 adopt a hinged transmission structure to convert the hydraulic telescopic power into lateral opening and closing thrust, ensuring smooth power transmission. The two connecting arms 502 are hinged to connecting rods 503, which serve as... The linkage mechanism synchronously drives the opening and closing of the baffles on both sides to ensure consistent opening and closing of the discharge port 302. The two connecting rods 503 and the limiting block 301 are movably connected. The outer peripheral surfaces of the two connecting rods 503 are fixedly connected to the connecting blocks 504. The connecting blocks 504 achieve a rigid connection between the connecting rods 503 and the baffles 505, ensuring that the power is accurately transmitted to the baffles. The tops of the two connecting blocks 504 are fixedly installed with baffles 505. The two baffles 505 are attached to the surface of the discharge port 302. The baffles are made of a sealed wear-resistant material. When closed, they completely block the discharge port 302 to prevent material leakage during the mixing process. When opened, they quickly detach from the discharge port 302 to ensure smooth discharge.

[0052] It should be noted that the hydraulic telescopic cylinder 501 uses existing equipment and is connected to an external hydraulic system. The specific control logic is all existing technology and will not be described in detail here.

[0053] Heating plates 303 are symmetrically arranged at both ends of the bottom of the cylinder 3. The heating plates 303 adopt a large-area contact design to provide continuous and constant temperature heating for the asphalt mixture at the bottom of the tank, maintain the temperature required for asphalt mixing, and ensure the fluidity of the mixture. The tops of the two heating plates 303 are in contact with the bottom ends of the cylinder 3. The contact layout improves heat transfer efficiency. Both sides of the two heating plates 303 are fixedly connected to the inner side of the base 1 to ensure that the heating plates 303 are installed stably. The interior of the two heating plates 303 has rectangular grooves, which are the first heating... Pipe 305 provides dedicated installation space, fixing the position of the heat pipe while concentrating heat energy. Two heating plates 303 are located at one end of the rectangular groove and are equipped with a cover plate 304. The cover plate 304 plays a sealing and protective role, preventing dust and asphalt debris from entering the rectangular groove and damaging the heat pipe, thus extending the service life of the heat pipe. One side of the cover plate 304 is equipped with a first heat pipe 305 that is inserted into the rectangular groove. The first heat pipe 305 is a high-efficiency constant temperature heat pipe. After being powered on, it heats up quickly and conducts the temperature evenly to the heating plate, accurately controlling the mixing temperature at the bottom of the tank and ensuring the mixing quality of the mixture.

[0054] A controller body 8 is fixedly installed on one side of the support base 606. The controller body 8 is wired to the second heat pipe 704 and the first heat pipe 305, and can adjust the heating temperature in real time. The controller body 8 is electrically connected to the drive motor 4, and can flexibly adjust the stirring speed.

[0055] It should be noted that the controller body 8, the second heat pipe 704, the first heat pipe 305, and the drive motor 4 all use existing equipment, and the specific control logic is all existing technology, which will not be described in detail here.

[0056] It should be noted that the cylinder 3 has three inlets and outlets on its side. The two upper ones are inlets, which are used for asphalt discharge and asphalt-specific heat transfer oil discharge, respectively. The lower side has one outlet, which is used to transport the finished asphalt to the asphalt mixing pot.

[0057] A method for producing oil-resistant asphalt mixture includes the following steps:

[0058] S1: First, asphalt and 425 cement are injected into the tank through the feeding port 203. This feeding step adopts a layered feeding method, adding asphalt first and then cement to ensure orderly initial contact of materials. Since the asphalt slurry formed after mixing asphalt and mineral powder is soaked in gasoline, the asphalt dissolves and mineral powder is easily lost. Traditional mineral powder has poor oil resistance and is easy to loosen, which seriously reduces the structural stability of the mixture. Therefore, the filler used is 425 cement to replace traditional mineral powder. 425 cement has extremely strong oil resistance, curing and bonding properties, and plays the role of inorganic activator and curing agent. It can enhance the structural strength of the asphalt slurry and improve the oil erosion resistance. After mixing, the cement is not easy to lose after curing, and firmly locks in the asphalt components, further preventing the asphalt mixture from becoming loose and peeling after being soaked in gasoline, thus improving the oil resistance of the mixture from the matrix level.

[0059] S2: The drive motor 4 is started by the controller body 8, which drives the drive roller 401 and the stirring paddle 402 to rotate. The high-speed rotation of the stirring paddle 402 forms a strong convection mixing field, which fully agitates the asphalt and 425 cement in the tank, breaks up material agglomerates, and allows the two to initially form a uniform matrix. At the same time, the controller body 8 turns on the power supply to the second heat pipe 704 and the first heat pipe 305, and the two heat pipes start heating synchronously. The first heat pipe 305 heats the matrix material at the bottom of the tank at a constant temperature through the heating plate 303 to maintain the fluidity of the asphalt. The second heat pipe 704 targets the suction head 701. The mixing area is preheated by heating, thereby heating the heating plate 303 and the suction head 701. Once the specified mixing temperature is reached, an anti-oil agent composed of oxidized polyethylene (OPE) is added to the tank through the feeding port 203. OPE is a core modifier for improving the oil resistance of asphalt. Dissolving OPE in SBS-modified asphalt significantly enhances the viscosity and cohesion of the asphalt, while simultaneously encapsulating asphalt molecules to provide physical isolation, forming a dense protective film. This prevents direct contact between the asphalt and gasoline, blocking the gasoline erosion path and strengthening the mixture's oil resistance from a modification perspective.

[0060] S3: The anti-oil agent is a white crystalline granule. Due to the high viscosity of asphalt and its density difference, the anti-oil agent powder tends to float on the surface of the asphalt layer without dissolving or dissolving completely. Direct mixing can lead to localized enrichment and uneven distribution, causing the anti-oil agent to float at the top of the tank and fail to perform its modifying function. At this point, the twin-screw pump 601 is started by the controller body 8. The pump operates to create a high-intensity negative pressure, thereby generating a continuous and stable suction force at the lower suction port 705 and the upper suction port 707 connected to the first connecting pipe 602. This generates a very strong directional suction force, preventing the suction force from being dispersed and causing adsorption failure. Since the suction head 701 is inserted into the asphalt, but the top is close to the floating anti-oil agent on the upper layer, it accurately aligns with the floating particles. Under the action of suction force, the lower suction port 705 adsorbs the asphalt that has not been fully mixed with the anti-oil agent and enters the mixing chamber 706, providing the basic material for premixing. At the same time, multiple upper suction ports 707 are opened in a ring at the top. 7. The anti-oil agent floating on the top is adsorbed and enters the mixing chamber 706, realizing the simultaneous entry of the two materials into the chamber. At the same time, after the suction head 701 is heated to a fixed temperature, the high temperature environment quickly breaks down the crystalline anti-oil agent particles, causing the anti-oil agent to completely dissolve. At this time, the anti-oil agent sucked in through the upper suction port 707 is directly dissolved under the action of high temperature and produces a preliminary fusion with the asphalt in the mixing chamber 706, forming a uniform premix, avoiding particle agglomeration. Then, the pre-fused mixed asphalt is transported by the twin screw pump 601 to the second connecting pipe 603 and enters the distribution box 604. The distribution box 604 evenly distributes the premix, thereby achieving the effect of secondary mixing. Finally, the mixed asphalt is transported through the discharge pipe 605 to the heating area at the bottom of the tank, returning to the core mixing zone to be deeply mixed with the base material, thereby completing the full mixing of asphalt and anti-oil agent, and finally producing an asphalt mixture with excellent oil erosion resistance and stable structure.

[0061] The working principle of this invention is as follows: The controller body 8 starts the drive motor 4, which drives the drive roller 401 and the spiral stirring paddle 402 to rotate at high speed. Axial and radial convection is formed in the sealed mixing tank formed by the cover body 2 and the cylinder body 3. The asphalt and 425 cement that are added in advance through the feeding port 203 are initially mixed, breaking up material agglomerates and forming a uniform matrix. At the same time, the first heat pipe 305 and the second heat pipe 704 are simultaneously energized and heated. The first heat pipe 305 heats the material at the bottom of the tank at a constant temperature through the heating plate 303 to maintain the fluidity of the asphalt and prevent solidification. The second heat pipe 704 conducts heat energy to the suction head 701 and the heat conduction block 702 to preheat the mixing area in advance, and prepares the temperature control for the subsequent dissolution and premixing of the anti-oil stain agent. This stage completes the mixing of matrix materials and the laying of temperature control, laying the foundation for the mixing of the mixture.

[0062] The twin-screw pump 601 is started by the controller body 8, generating a high-intensity negative pressure. This pressure drives the lower suction port 705 and upper suction port 707 of the suction head 701 to operate simultaneously via the first connecting pipe 602. The lower suction port 705 draws in the base asphalt from the bottom of the tank, while the upper suction port 707 adsorbs the floating OPE anti-oil stain agent particles. The two materials converge in the mixing chamber 706 inside the suction head 701. The heated suction head 701 rapidly melts the crystalline anti-oil stain agent, causing it to initially fuse with the asphalt in a high-temperature, sealed environment to form an intermediate material, which is then pumped by the twin-screw pump. 601. The second connecting pipe 603 conveys the material to the distribution box 604 for diversion, and finally returns to the mixing area at the bottom of the tank through the discharge pipe 605, forming a closed loop circulation. This continuously breaks down the material stratification, allowing the anti-oil agent to be evenly dispersed in the asphalt matrix, greatly improving the oil erosion resistance of the mixture. Finally, when it is necessary to discharge the material, the hydraulic telescopic cylinder 501 of the discharge component 5 is operated. Through the linkage transmission of the connecting arm 502 and the connecting rod 503, the flow baffle 505 is moved laterally, accurately opening the discharge port 302. The symmetrical large-diameter discharge port 302 achieves fast and smooth discharge.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] It should be noted that the main component of the anti-oil agent is oxidized polyethylene (OPE). This highly polar material is insoluble in gasoline. When OPE is dissolved in SBS modified asphalt, it can increase the viscosity of the asphalt and at the same time encapsulate the asphalt molecules to act as a barrier, preventing the asphalt from directly contacting gasoline.

[0065] It should also be noted that asphalt is a complex polymer mixture composed of four components: saturated components (molecular structures of alkanes and cycloalkanes), aromatic components (molecular structures of monocyclic and polycyclic aromatic hydrocarbons), resins (molecular structures of rosin acids, etc.), and asphaltenes (molecular structures of polycyclic aromatic hydrocarbons, alkyl chains, and heteroatom groups). Chemically, it mainly consists of alkanes, cycloalkanes, aromatic hydrocarbons, and their derivatives. Gasoline, on the other hand, primarily consists of alkanes, cycloalkanes, and aromatic hydrocarbons. Based on the principle of "like dissolves like," the components of asphalt and gasoline are quite similar; therefore, asphalt is readily soluble in organic solvents such as gasoline and diesel.

[0066] Gasoline is a strongly non-polar material, while the developed anti-oil agent's main component is oxidized polyethylene powder (OPE), a strongly polar material that does not dissolve in gasoline. By adding this anti-oil agent to SBS modified asphalt to encapsulate the asphalt molecules, the asphalt's viscosity is enhanced, significantly reducing its solubility in gasoline. Furthermore, after dissolving in SBS asphalt, the OPE powder can encapsulate the asphalt molecular groups, preventing direct contact between the asphalt and gasoline. Therefore, after immersion in gasoline, the asphalt mixture specimens maintain their integrity and possess a certain strength.

[0067] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oil-resistant asphalt mixture production equipment, comprising a base (1), characterized in that: The top of the base (1) is provided with a cover (2), and a feeding port (203) is opened in the middle of the top of the cover (2). A cylinder (3) is provided on both sides of the cover (2). The cover (2) and the cylinder (3) are combined to form a tank for mixing materials. An external circulation component (6) is provided at one end of the top of the cover (2). The external circulation component (6) includes a twin screw pump (601) fixedly installed on the top of the cover (2), and the input end of the twin screw pump (601) is provided with a first connecting pipe (602). The cover (2) has a first baffle (201) and a second baffle (202) fixedly installed at both ends of the upper part of the inside. A mixing component (7) is provided in the middle of the first baffle (201) and the second baffle (202). The mixing assembly (7) includes a suction head (701), an annular cavity (703) is provided inside the suction head (701), a second heat pipe (704) is provided inside the annular cavity (703), a mixing chamber (706) is provided at the bottom of the suction head (701), a lower suction port (705) is provided at the bottom center of the mixing chamber (706), and a plurality of upper suction ports (707) communicating with the mixing chamber (706) are provided at the top of the suction head (701). The top of the suction head (701) is connected to the first connecting pipe (602). A heat-conducting block (702) is fixedly installed on the outer periphery of the suction head (701). The suction head (701) and the heat-conducting block (702) are heated by the second heat pipe (704) to accelerate the melting of the anti-oil stain agent particles floating above the tank. Utilizing the height difference between the lower suction port (705) and the upper suction port (707), while sucking the bottom asphalt material, the melted anti-oil stain agent particles at the top are simultaneously adsorbed through the annular upper suction port (707). The two are premixed at high temperature in the mixing chamber (706) to form a uniform intermediate material, which provides a basis for subsequent mixing and improves the oil stain erosion resistance and structural stability of the mixture.

2. The oil-resistant asphalt mixture production equipment according to claim 1, characterized in that: A connecting post (708) is fixedly installed on the top of the suction head (701). The top of the connecting post (708) is fixedly connected to the cover (2). The equivalent aperture of the multiple upper suction ports (707) is the same as the aperture of the lower suction port (705).

3. The oil-resistant asphalt mixture production equipment according to claim 2, characterized in that: The output end of the twin screw pump (601) is fixedly connected to a second connecting pipe (603), and the input end of the second connecting pipe (603) is fixedly connected to a material distribution box (604). The bottom of the material distribution box (604) is fixedly connected to a support base (606), and the bottom of the support base (606) is fixedly connected to the top of the cover (2). The bottom of one side of the material distribution box (604) is symmetrically connected to a discharge pipe (605), and the input ends of the two discharge pipes (605) are connected to the bottom sides of one end of the cover (2).

4. The oil-resistant asphalt mixture production equipment according to claim 3, characterized in that: A drive motor (4) is fixedly installed at one end of the top of the base (1). A drive rod (401) is fixedly connected to the output end of the drive motor (4). Both ends of the drive rod (401) are movably connected to the cover (2). A stirring paddle (402) is provided on the outer circumferential surface of the drive rod (401). A bearing seat (204) is rotatably connected to the end of the drive rod (401) away from the drive motor (4). A support plate (205) is fixedly connected to the bottom of the bearing seat (204). The support plate (205) is fixedly connected to one end of the cover (2).

5. The oil-resistant asphalt mixture production equipment according to claim 1, characterized in that: Limiting blocks (301) are symmetrically provided on both sides of the bottom middle of the cylinder (3), and discharge ports (302) are symmetrically provided in the bottom middle of the cylinder (3). A feeding component (5) for controlling the opening and closing of the discharge port (302) is provided in the top middle of the base (1).

6. The oil-resistant asphalt mixture production equipment according to claim 5, characterized in that: The feeding assembly (5) includes hydraulic telescopic cylinders (501) symmetrically arranged on both sides of the limiting block (301). The mounting ends of the two hydraulic telescopic cylinders (501) are fixedly connected to the inner side of the base (1). The telescopic ends of the two hydraulic telescopic cylinders (501) are hinged with connecting arms (502). The two connecting arms (502) are hinged with connecting rods (503). The two connecting rods (503) are movably connected to the limiting block (301). The outer peripheral surfaces of the two connecting rods (503) are fixedly connected with connecting blocks (504). The tops of the two connecting blocks (504) are fixedly installed with baffles (505). The two baffles (505) are attached to the surface of the discharge port (302).

7. The oil-resistant asphalt mixture production equipment according to claim 1, characterized in that: Heating plates (303) are symmetrically arranged at both ends of the bottom of the cylinder (3). The tops of the two heating plates (303) are attached to the bottom ends of the cylinder (3). Both sides of the two heating plates (303) are fixedly connected to the inner side of the base (1). A rectangular groove is opened inside the two heating plates (303). A cover plate (304) is provided at one end of the rectangular groove of the two heating plates (303). A first heat pipe (305) is provided on one side of the cover plate (304) and inserted into the rectangular groove.

8. The oil-resistant asphalt mixture production equipment according to claim 3, characterized in that: A controller body (8) is fixedly installed on one side of the support base (606). The controller body (8) is connected to the second heat pipe (704) and the first heat pipe (305) by wires. (8) Electrically connected to the drive motor (4).

9. The method for producing oil-resistant asphalt mixture according to claim 1, applied to the method for producing oil-resistant asphalt mixture according to any one of claims 1-8 (reinforcing steel body), characterized in that: Includes the following steps: S1: First, asphalt and (425) cement are injected into the tank through the feeding port (203). Asphalt slurry formed after mixing asphalt and mineral powder is soaked in gasoline, the asphalt dissolves and mineral powder is easily lost. Therefore, the filler used is (425) cement to replace traditional mineral powder. (425) cement plays the role of inorganic activator and curing agent. After mixing, the cement is cured and not easily lost, further preventing the asphalt mixture from becoming loose after being soaked in gasoline. S2: The drive motor (4) is started by the controller body (8), thereby driving the drive roller (401) and the stirring paddle (402) to rotate, thereby stirring the asphalt and cement (425) in the tank. At the same time, the power supply of the second heat pipe (704) and the first heat pipe (305) is turned on by the controller body (8), thereby heating the heating plate (303) and the suction head (701). After the temperature reaches the specified temperature, an anti-oil stain agent composed of oxidized polyethylene (OPE) is put into the tank through the feeding port (203). After the OPE is dissolved in the SBS modified asphalt, it can enhance the viscosity of the asphalt. At the same time, it encapsulates the asphalt molecules to play an isolation role, preventing the asphalt from directly contacting gasoline. S3: The anti-oil agent is a white crystalline granule. Due to the high viscosity of asphalt, the anti-oil agent powder tends to float on the surface of the asphalt layer without dissolving or dissolving completely, which will cause the anti-oil agent to float on the top of the tank. At this time, the twin screw pump (601) is started by the controller body (8), which causes the lower suction port (705) and the upper suction port (707) connected to the first connecting pipe (602) to generate suction, which generates a very strong suction. Since the suction head (701) is inserted into the asphalt, but the top is close to the anti-oil agent floating on the upper layer, under the action of suction, the lower suction port (705) adsorbs the asphalt that has not been fully mixed with the anti-oil agent and enters the mixing chamber (706). At the same time, the top ring-shaped opening Multiple upper suction ports (707) will adsorb the anti-oil agent floating on the top and enter the mixing chamber (706). At the same time, after the suction head (701) is heated to a fixed temperature, it will promote the dissolution of the anti-oil agent. At this time, the anti-oil agent sucked in through the upper suction port (707) will be directly dissolved in the asphalt in the mixing chamber (706) under the action of high temperature, and then the initially fused mixed asphalt is pumped by the twin screw pump (601) to the second connecting pipe (603) into the distribution box (604), thereby achieving the effect of secondary mixing. Finally, the mixed asphalt is transported through the discharge pipe (605) to the heating area at the bottom of the tank, thereby completing the full mixing of asphalt and anti-oil agent.

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