Vehicle silting and trapping-removing auxiliary agent and use method of vehicle silting and trapping-removing auxiliary agent

Abstract

The invention relates to the technical field of vehicle emergency rescue, in particular to a vehicle silting and detrapping auxiliary agent and a using method thereof. The auxiliary agent is prepared from 60 to 70 parts of polyurethane prepolymer, 5 to 8 parts of epoxy acrylate, 4 to 6 parts of fluorine-silicon composite water repellent agent, 3 to 5 parts of intercalated nano kaolin, 3 to 5 parts of low-temperature foaming agent HFO-1234ze, 2 to 4 parts of chemical foaming system, 4 to 6 parts of copper-plated carbon fiber short filament, 2 to 3 parts of boron modified silicon dioxide aerogel, 2 to 4 parts of temperature-sensitive phase change microcapsule and 1 to 2 parts of dioctyl adipate. A double-stage puffing process is realized by forming a puffing matrix framework through a polyurethane prepolymer and epoxy acrylate and combining a low-temperature physical foaming agent and a chemical foaming system. Meanwhile, the copper-plated carbon fiber short filaments are directionally arranged, so that the tensile strength of the expanded body is remarkably improved, the technical problems that a traditional escape material is low in expansion speed and insufficient in mechanical property are solved, stable support can be provided for a silted vehicle within extremely short time, the vehicle is effectively prevented from further sinking, and the escape efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle emergency rescue, and in particular to a vehicle stuck and rescue auxiliary agent and a use method thereof. Background Art

[0002] In daily travel and special operation scenarios, vehicles frequently get stuck in soft surfaces such as mud, sand, and snow. According to relevant statistics, millions of rescue requests are made each year due to vehicle sedimentation, which not only causes great inconvenience to vehicle owners, but also results in high rescue costs and time loss. Traditional methods for dealing with vehicle sedimentation vary, such as using wooden boards, stones and other objects to pad under the tires, or trying to get out of the predicament by reducing tire pressure or having multiple people push the cart. However, these methods are not very effective in complex environments. Wooden boards and stones are difficult to provide stable support on soft surfaces. Reducing tire pressure can easily damage the tires and is subject to environmental restrictions. Having multiple people push the cart is inefficient and poses safety risks.

[0003] Existing methods focus on improving the vehicle's structure or power system to enhance its ability to escape. These methods primarily address anti-skid and power distribution during driving, but they are difficult to fundamentally address when the vehicle is deeply stuck in a muddy pit and the surrounding ground support is severely insufficient. Alternatively, conventional curing agents can be injected into the ground to enhance its bearing capacity. However, these curing agents react slowly and have a narrow temperature range, making them ineffective in low-temperature environments. Furthermore, the curing process is significantly affected by humidity, making it difficult to achieve the desired curing effect on damp surfaces. Consequently, vehicle escape remains challenging. Therefore, we propose a vehicle escape aid and its use method. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a vehicle stuck escape auxiliary agent and a method for using the same, thereby solving the technical problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A vehicle stuck and escape auxiliary agent, comprising the following components in parts by weight:

[0007] 60-70 parts of polyurethane prepolymer, 5-8 parts of epoxy acrylate, 4-6 parts of fluorosilicone composite hydrophobic agent, 3-5 parts of intercalated nano-kaolin, 3-5 parts of low-temperature foaming agent HFO-1234ze, 2-4 parts of chemical foaming system, 4-6 parts of copper-plated carbon fiber staples, 2-3 parts of boron-modified silica aerogel, 2-4 parts of thermosensitive phase change microcapsules, and 1-2 parts of dioctyl adipate.

[0008] In a possible implementation, the polyurethane prepolymer is a toluene diisocyanate (TDI) modified type.

[0009] In a possible implementation, the chemical foaming system is formed by mixing ammonium persulfate and ascorbic acid in a mass ratio of 1:3.

[0010] In a possible implementation, the fluorosilicone composite hydrophobic agent is copolymerized by methyltrifluoropropylsiloxane and perfluoropolyether, and has a contact angle of ≥130°.

[0011] In a possible implementation, the intercalated nano-kaolin is modified with hexadecyltrimethylammonium bromide, and the thickness of the layer is ≤5 nm.

[0012] In a possible implementation, the length of the copper-plated carbon fiber short filaments is 0.8-1.2 mm, and the surface coating thickness is 50-100 nm.

[0013] In one possible implementation, a method for using the vehicle stuck escape auxiliary agent includes the following steps:

[0014] Step 1: Conduct a quick on-site assessment using a spring-loaded puncture tester. If the average puncture depth at any test point is greater than 15 cm and the overall average rebound rate is less than 30%, the scenario is considered suitable and a warning sign is placed 50 cm behind the tire.

[0015] Step 2: Directional spraying: Shake the tank for more than 30 seconds, install a fan-shaped diffusion nozzle, and spray the tread pattern area at a 45° elevation angle and 20 cm from the tire for 5-8 seconds in the first layer. Spray the tire-ground contact seam horizontally close to the ground for 10-12 seconds in the second layer.

[0016] Step 3: Puffing process: primary puffing for 0-20 seconds, physical foaming agent dominates the volume expansion to 4-5 times, and the core temperature is monitored to be greater than 40°C; enhanced puffing for 20-60 seconds, chemical foaming agent increases porosity, and when the ambient temperature is below -10°C, wrap with a self-heating blanket;

[0017] Step 4: Mechanical reinforcement operation: insert anti-slip nails vertically on the surface of the expanded body and inject 0.08MPa compressed air into the expanded body;

[0018] Step 5: Gradual power escape: In the primary mode, the engine speed is controlled to ≤1500rpm and the tire rotation angle is less than 5°; in the enhanced mode, if the tire slip rate is greater than 30%, 150mL of auxiliary agent is sprayed, the differential lock is activated, and the low-speed four-wheel drive gear is switched; in the emergency mode, a traction belt with a breaking strength of ≥5 tons is inserted for external traction;

[0019] Step 6: Post-processing: spray the remaining expanded body with biodegradable liquid and use a high-pressure cleaner to remove the residue in the tire gap.

[0020] Beneficial effects compared with existing technologies:

[0021] 1. In this solution, the expanded matrix skeleton is formed by the prepolymerization reaction of a fast-curing polyurethane prepolymer and epoxy acrylate. Combined with the instant foaming ability of the low-temperature physical foaming agent HFO-1234ze at -30°C, and the continuous foaming effect of the chemical foaming system releasing a CO2 / N2 mixed gas when exposed to moisture, a two-stage expansion process of "physical foaming rapid expansion + chemical foaming pore strengthening" is achieved. At the same time, the copper-plated carbon fiber filaments are oriented along the force direction of the tire under the action of the electromagnetic orientation device, which significantly improves the tensile strength of the expanded body and expands 4-5 times in volume within 20 seconds after injection. This solves the technical problems of slow expansion speed and insufficient mechanical properties of traditional escape materials. It can provide stable support for trapped vehicles in a very short time, effectively preventing the vehicle from sinking further, and significantly improving the escape efficiency.

[0022] 2. In this solution, the performance degradation problem of traditional escape materials in extreme environments is solved through the design of multi-layer functional materials. Fluorosilicone composite hydrophobic agent is combined with the lamellar structure of intercalated nano-kaolin to construct a multi-layer water molecule blocking barrier inside, effectively avoiding the degradation of mechanical properties due to water absorption. The low thermal conductivity of boron-modified silica aerogel can block the heat conduction generated by tire friction; the n-octacosane in the inner core of the thermosensitive phase change microcapsule undergoes a phase change and absorbs heat at 55°C, preventing the auxiliary agent from softening and failing in high temperature environments; dioctyl adipate lowers the glass transition temperature, so that the auxiliary agent still maintains good toughness at low temperatures of -40°C, avoiding brittle cracking. The synergistic effect of the above materials enables the auxiliary agent to maintain stable performance in a wide temperature range of -40°C to 55°C and in humid environments, breaking through the strict restrictions of traditional materials on environmental conditions and greatly increasing the application scenarios;

[0023] 3. In this solution, the auxiliary agent is encapsulated in a core-shell structure between the main agent and the temperature-sensitive microcapsules using a coaxial filling machine. Combined with the directional spraying process of a fan-shaped diffuser nozzle, the total spray volume is reduced by 30%-40% compared to traditional technologies. After being released, the remaining expanded body is sprayed with a biodegradable liquid containing Pseudomonas bacteria, ultimately decomposing it into CO2 and water, leaving no chemical residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic flow chart of a method for preparing a vehicle siltation escape auxiliary agent according to the present invention;

[0026] Figure 2 The present invention is a flow chart of a method for using the vehicle siltation escape auxiliary agent. DETAILED DESCRIPTION

[0027] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be implemented in various forms, and therefore the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components that are not related to the present invention will be omitted from the drawings.

[0028] The technical solutions in the embodiments of the present application are to solve the problems of the above-mentioned background technology, which are generally as follows:

[0029] Example:

[0030] 1. A vehicle stuck and rescue aid, comprising the following raw materials:

[0031] Polyurethane prepolymer: This prepolymer accounts for 60-70 parts of the auxiliary agent and is modified with toluene diisocyanate (TDI). Its NCO content is ≥20%. The isocyanate groups in its molecular structure rapidly crosslink with the reactive functional groups of the epoxy acrylate, forming a three-dimensional network structure that provides the basic support strength for the auxiliary agent. Its viscosity is ≤500 mPa·s at 25°C, and its excellent fluidity facilitates uniform mixing with other materials during the preparation process.

[0032] Epoxy acrylate: This accounts for 5-8 parts of the adjuvant and contains glycidyl methacrylate (GMA) functional groups. This functional group can undergo a grafting reaction with hydroxyl and carboxyl groups on the tire rubber surface, forming a chemical anchoring effect, strengthening the chemical bond between the adjuvant and the tire rubber, and improving the adjuvant's adhesion and stability on the tire surface.

[0033] Fluorosilicone composite hydrophobic agent: This agent, comprising 4-6 parts of the auxiliary agent, is a copolymer of methyltrifluoropropylsiloxane and perfluoropolyether. It boasts a contact angle of ≥130° and excellent hydrophobic properties. The fluorine atoms in its molecular chain form a strong hydrophobic layer, creating a nanoscale waterproof barrier on the surface of the expanded material. When a vehicle becomes stuck in muddy or wet conditions, it forms a hydrophobic protective film on the expanded material, preventing water molecules from penetrating the interior and thus preventing performance degradation due to water absorption.

[0034] Intercalated nano-kaolin: 3-5 parts of the additive, modified with cetyltrimethylammonium bromide, with a flake thickness of ≤5nm. The nanosheets are evenly dispersed throughout the matrix, forming a multi-layer barrier structure that extends the water permeation path by 3-5 times, further enhancing impermeability.

[0035] Low-temperature foaming agent HFO-1234ze: accounts for 3-5 parts in the auxiliary agent, and can still foam in a low-temperature environment of -30°C. In actual use, it can quickly vaporize and expand, so that the auxiliary agent forms a large number of bubbles in a short period of time, achieving volume expansion and forming an initial support structure, providing additional support for the vehicle.

[0036] Chemical foaming system: This system comprises 2-4 parts of the auxiliary agent and is composed of a mixture of ammonium persulfate and ascorbic acid in a mass ratio of 1:3. When exposed to moisture, a redox reaction occurs, releasing a CO2 / N2 gas mixture. During the preparation and use of the auxiliary agent, contact with moisture continuously releases gas, increasing the porosity of the expanded material and improving its compressive strength and cushioning properties.

[0037] Copper-coated carbon fiber filaments: These comprise 4-6 parts of the auxiliary agent, are 0.8-1.2mm long, and have a surface coating thickness of 50-100nm. Carbon fiber inherently possesses high strength and modulus, and the copper coating enhances its interfacial bonding with other components and enhances its electrical conductivity. Within the expanded material, the copper-coated carbon fiber filaments are evenly distributed, forming a high-strength reinforcement network that effectively resists the tensile stresses generated during vehicle extrication.

[0038] Boron-modified silica aerogel: 2-3 parts of the auxiliary agent, with a pore size of 20-50 nm and a compressive strength of 10 MPa or higher. Its porous structure provides excellent thermal insulation, absorbing heat. Its high compressive strength also provides additional support for the expanded material. In high-temperature environments, it prevents heat transfer into the auxiliary agent, maintaining stable performance. Under vehicle pressure, it can partially withstand the pressure, preventing excessive deformation of the expanded material.

[0039] Thermosensitive phase-change microcapsules account for 2-4 parts of the auxiliary agent. They have a polyurethane shell and a core containing n-octacosane, with a phase transition temperature of 55°C. When the ambient temperature reaches 55°C, the n-octacosane undergoes a phase change, absorbing heat and lowering the internal temperature of the expanded body. This prevents the auxiliary agent from degrading due to excessive temperatures and ensures stable performance during vehicle rescue in high-temperature environments.

[0040] Dioctyl adipate: accounts for 1-2 parts of the auxiliary agent. Its main function is to improve the low-temperature toughness of the auxiliary agent at -40°C. It can lower the glass transition temperature of the auxiliary agent, allowing the auxiliary agent to maintain good flexibility at low temperatures and prevent brittleness and cracking.

[0041] 2. In the process of preparing a vehicle stuck and rescue auxiliary agent, the following instruments are used:

[0042] Vacuum planetary mixer: This equipment has parameters of orbital speed of 0-50r / min and rotational speed of 0-150r / min. Its core function is to achieve bubble-free mixing of high-viscosity materials such as polyurethane prepolymer and epoxy acrylate by evacuating the environment and temperature control system to -0.07MPa, completing the initial dispersion of the base material and additives and triggering the prepolymerization reaction, so that the system viscosity can be stabilized to 800mPa·s. The vacuum environment can also inhibit the reaction of isocyanate groups with moisture in the air, ensuring the purity of the prepolymer.

[0043] Ultrasonic disperser: frequency 40kHz, power 200-800W, uses the instantaneous high pressure and strong shock waves generated by the ultrasonic cavitation effect to disperse the fluorosilicone composite hydrophobic agent and nano-kaolin premixed with anhydrous ethanol at a ratio of 1:4, destroying the agglomeration of the hydrophobic agent and making the nano-material evenly distributed, ensuring the anti-permeability performance of the hydrophobic system and product stability.

[0044] High-pressure injection machine: With a pressure range of 0-15MPa and equipped with a static mixer, the low-temperature physical foaming agent HFO-1234ze is injected into the main reactor in liquid form by setting an appropriate pressure such as 0.7MPa to prevent it from vaporizing prematurely. At the same time, the spiral blade structure of the static mixer is used to achieve efficient mixing of the foaming agent and the base material.

[0045] Electromagnetic orientation device: It has an adjustable magnetic field strength of 0-1.5T and an effective area of ≥30cm×30cm. After adding copper-plated carbon fiber filaments in batches, the device is started with a magnetic field strength of 0.5T. The Lorentz force is used to orient the carbon fiber filaments along the force direction of the tire. A single 30-second action can achieve an orientation degree of more than 85%, forming a high-strength reinforcement network to improve the tensile strength of the expanded body.

[0046] Coaxial filling machine: With dual-channel accuracy of ±0.5% and a temperature range of 20-80°C, the coaxial flow design of the inner and outer tubes allows the thermosensitive phase change microcapsules and dioctyl adipate to be simultaneously encapsulated into pressure-resistant steel tanks in a core-shell structure.

[0047] 3. A method for preparing a vehicle stuck and escape auxiliary agent, comprising the following steps:

[0048] Step 1: Matrix pre-reaction

[0049] Weigh 65 parts of polyurethane prepolymer and 7 parts of epoxy acrylate. Use an electronic balance for weighing. Carefully put the weighed materials into a clean and dry vacuum planetary mixer. Close the mixer door, start the vacuum system, and pump the internal pressure to -0.07MPa. Turn on the heating device and slowly increase the temperature to 55℃±2℃ at a rate of 1-2℃ per minute. After reaching the target temperature, set the mixer revolution speed to 20r / min and the rotation speed to 100r / min, and stir for 20 minutes. During the stirring process, the viscosity change is monitored in real time by the viscosity sensor. When the viscosity reaches 800mPa·s, the prepolymerization reaction is completed and proceed to the next step. To ensure uniform stirring effect, regularly check whether there is material attached to the stirring paddle of the mixer and clean it in time if necessary.

[0050] Step 2: Build a hydrophobic system

[0051] Add 5 parts of fluorosilicone composite hydrophobic agent to the system that has completed the pre-reaction. Before adding, ensure that the storage container of the fluorosilicone composite hydrophobic agent is well sealed and there is no leakage or contamination. After adding, immediately start the ultrasonic disperser with a power of 500W and process for 15 minutes. In another container that has been cleaned and dried, premix 4 parts of nano kaolin and anhydrous ethanol in a ratio of 1:4. During the premixing process, use a high-speed stirrer to stir thoroughly at a speed of 1000-1500 revolutions per minute for 10-15 minutes to evenly disperse the nano kaolin in anhydrous ethanol. Then, use an atomizing nozzle to slowly spray the premixed liquid into the reaction system. The spray pressure of the atomizing nozzle is controlled at 0.2-0.3MPa to ensure that the premixed liquid is evenly dispersed. After spraying, maintain the system temperature at 60°C and use a stirrer to stir continuously at a speed of 50-80 revolutions per minute for 30 minutes to construct a hydrophobic system.

[0052] Step 3: Gradient foaming system

[0053] Set the pressure of the high-pressure injection machine to 0.7 MPa and connect the HFO-1234ze storage tank to the main reactor. Turn on the high-pressure injection machine and slowly inject 4 parts of HFO-1234ze into the main reactor over a period of 5-8 minutes to avoid injecting too quickly or too slowly, which could affect the foaming effect. Accurately weigh the chemical foaming agent raw materials in a ratio of 1 part ammonium persulfate to 3 parts ascorbic acid using an electronic balance. After mixing the two raw materials, place them in a ball mill and mill them at a speed of 300-500 rpm for 30-40 minutes until the particle size is ≤10μm. After ball milling, add the chemical foaming agent to the reaction system to form a gradient foaming system together with the HFO-1234ze. During the ball milling process, regularly sample and test the particle size to ensure that the expected requirements are met.

[0054] Step 4: Fiber reinforcement

[0055] Add 5 parts of copper-coated carbon fiber staples to the reaction system three times, adding about 1 / 3 of the amount each time. During the addition process, use a feeding device to ensure that the staples are evenly dispersed and added to the system to avoid agglomeration of the staples. After each addition, immediately start the electromagnetic orientation device with a magnetic field strength of 0.5T for 30 seconds. After adding 2.5 parts of boron-modified aerogel, switch the stirring paddle to an anchor stirring paddle and set the low speed (50r / min) to stir for 10 minutes to enhance the mechanical properties of the expanded body. When switching the stirring paddle, make sure that the stirring paddle is firmly installed to avoid shaking or falling off during stirring.

[0056] Step 5: Finished product packaging

[0057] Three parts of thermosensitive microcapsules and 1.5 parts of dioctyl adipate were added to two cleaned and calibrated hoppers of a coaxial filler. The coaxial filler temperature was set to 70°C, with dual channels controlled within ±0.5%. Both materials were then packaged simultaneously into pressure-resistant steel cans. During the packaging process, a weight sensor monitored the weight of the packaged materials in real time to ensure the required quantity was met. The seal was also checked to prevent leakage. After packaging, the pressure-resistant steel cans were placed in a 70°C hot water bath for 10-15 minutes to observe for leaks. If no leaks were found, the cans were filled with nitrogen at a pressure of 0.05-0.1 MPa for protection, and then sealed. The sealed product must be protected from environmental factors such as heat and humidity. The storage environment should be controlled between 5-35°C and 30%-70% relative humidity.

[0058] 4. A method for using a vehicle stuck and escape agent comprising the following steps:

[0059] Step 1: Rapid on-site assessment

[0060] Use a spring-loaded penetrator to vertically test the ground around the vehicle. Select test points 5-10 cm away from the tire edge in the front, rear, left, and right directions of the tire. Test each point three times. The specific operation is as follows: Insert the penetrator into the ground at a constant speed until it can no longer penetrate deeper, and record the maximum puncture depth H. m After the puncture instrument rebounds and stabilizes, record the final depth H f The single rebound rate is calculated according to the formula Calculate the rebound rate three times for each test point, and then summarize the average value of the four test points as the overall average rebound rate. If the average puncture depth of any test point is greater than 15cm and the overall average rebound rate is less than 30%, it is determined to be an applicable scenario. 50 cm behind the tire, firmly place a triangular warning sign with a high-brightness reflective strip to ensure that it is clearly visible during the day and at night. If there are other people on the scene, arrange for a special person to be on guard at a distance of 10-15 meters from the warning sign, direct passing vehicles and pedestrians to bypass the work area, prevent secondary siltation and collision accidents, and ensure on-site safety.

[0061] Step 2: Directional spraying construction

[0062] Remove the additive canister, hold it firmly with both hands, and shake it vigorously and rapidly for at least 30 seconds, 2-3 times per second, in the direction marked on the canister surface, to thoroughly mix the additive. Next, accurately install the fan-shaped diffuser nozzle at the canister outlet. Tighten the connection with the dedicated tool, and check that the nozzle is securely installed. For the first coat of spray: Stand in a safe position to the side of the vehicle, with both feet firmly planted, hold the canister in both hands, and adjust your posture so that the nozzle is 20 cm from the tire. Spray the additive at a 45° angle onto the tread area. Use a spray device with flow control and metering capabilities to control the spray volume and duration within 5-8 seconds. For the second coat of spray: After completing the first coat of spray, quickly squat down, close to the ground, and aim the nozzle horizontally at the contact gap between the tire and the ground. Start the spray device and slowly and evenly move the nozzle along the contact gap, using the spray metering device to control the spray volume and duration for 10-12 seconds.

[0063] Step 3: Puffing process

[0064] After spraying is complete, the primary puffing phase (0-20 seconds) begins. The physical foaming agent HFO-1234ze rapidly takes effect, and the auxiliary agent begins to expand in volume, expanding by 4-5 times within 20 seconds. At the beginning of puffing, insert a temperature probe vertically from the top center of the puffed body to a depth of approximately two-thirds of the body's height to monitor the core temperature in real time. A core temperature greater than 40°C indicates normal puffing. The enhanced puffing phase lasts 20-60 seconds, during which the chemical foaming agent continues to act, continuously increasing the porosity of the puffed body, ultimately reaching 75%-80%. If the ambient temperature drops below -10°C, immediately wrap the puffed body tightly with a self-heating blanket. The heating temperature of the self-heating blanket should be controlled between 40-50°C.

[0065] Step 4: Auxiliary reinforcement

[0066] Insert anti-slip spikes perpendicularly to the surface of the expanded material. Using a punching tool, drill holes 15cm x 15cm apart, with a depth of 8-10cm. Insert 10cm long anti-slip spikes into the holes one by one, ensuring that the spikes are perpendicular to the surface of the expanded material and inserted to a consistent depth. Use a vehicle-mounted air pump to inject compressed air into the expanded material. First, tightly connect the air pump's air pipe to the pre-installed inflation port on the expanded material to ensure there are no leaks. Set the air pump pressure to 0.08MPa, start the pump, and continue inflating for 3 seconds.

[0067] Step 5: Gradual power out of trouble

[0068] Primary Mode: Start the vehicle engine, ensure all systems are functioning normally, and shift into D. Use the engine speed control device to control the engine speed to no more than 1500 rpm. Slowly release the brakes while simultaneously monitoring the tire rotation angle using the vehicle's steering angle sensor in real time, maintaining the tire rotation angle below 5°. This angle limit ensures that the tire maintains a straight-line motion during the initial escape phase, maximizing the friction between the extruded body and the ground and preventing structural damage to the extruded body caused by lateral shear forces generated by steering.

[0069] Enhanced mode: If the tire speed sensor detects that the tire slip rate exceeds 30% in the primary mode, Among them, v t is the theoretical linear velocity of the tire, v s The actual vehicle speed is calculated based on the theoretical speed of the vehicle, wheel radius, transmission ratio, and vehicle acceleration. If the grip provided by the expanded material is insufficient to overcome the vehicle's resistance, immediately apply an appropriate amount of auxiliary agent according to the first-layer spraying procedure. Simultaneously, activate the differential lock through the vehicle's electronic control system and lock it. Then, shift the vehicle to low-speed four-wheel drive.

[0070] Emergency Mode: If Enhanced Mode still fails to free the vehicle, enter Emergency Mode. Use a high-strength traction belt with a breaking strength of at least 5 tons. Firmly embed one end of the traction belt into the expanded material to a depth of at least twice the belt's width. Use a dedicated fixing device to ensure a secure connection. Connect the other end of the traction belt to a winch, start the winch, and slowly reel in the traction belt at a speed of 1-2 meters per minute to apply external traction.

[0071] Step 6: Subsequent processing

[0072] After the vehicle is freed, spray the remaining puffed body with a biodegradable liquid containing Pseudomonas bacteria. Use a spray device and adjust the spray pressure to 0.3-0.5 MPa so that the biodegradable liquid is evenly sprayed in a mist on the surface of the remaining puffed body. Determine the spraying amount based on the volume of the remaining puffed body; generally, 5-10 liters of biodegradable liquid are sprayed per cubic meter of the remaining puffed body. After spraying, allow the degradation liquid to act for 2-3 hours. Use a high-pressure cleaner with a pressure of no less than 8 MPa to remove residues in the tire gaps. Adjust the nozzle of the high-pressure cleaner to the appropriate spray angle, generally 30-45 degrees, and clean the tire gaps one by one. During cleaning, control the movement speed of the cleaning machine nozzle to 2-3 cm per second. After cleaning, carefully check the condition of the tire to ensure that there are no residual impurities on the tire surface.

[0073] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A vehicle stuck and escape auxiliary agent, characterized in that: The composition comprises the following components in parts by weight: 60-70 parts of polyurethane prepolymer, 5-8 parts of epoxy acrylate, 4-6 parts of fluorosilicone composite hydrophobic agent, 3-5 parts of intercalated nano-kaolin, 3-5 parts of low-temperature foaming agent HFO-1234ze, 2-4 parts of chemical foaming system, 4-6 parts of copper-plated carbon fiber staples, 2-3 parts of boron-modified silica aerogel, 2-4 parts of thermosensitive phase change microcapsules, and 1-2 parts of dioctyl adipate.

2. The vehicle stuck escape auxiliary agent according to claim 1, characterized in that: The polyurethane prepolymer is a toluene diisocyanate TDI modified type.

3. The vehicle stuck escape auxiliary agent according to claim 1, characterized in that: The chemical foaming system is prepared by mixing ammonium persulfate and ascorbic acid in a mass ratio of 1:

3.

4. The vehicle stuck escape auxiliary agent according to claim 1, characterized in that: The fluorosilicone composite hydrophobic agent is copolymerized by methyl trifluoropropylsiloxane and perfluoropolyether, and has a contact angle of ≥130°.

5. The vehicle stuck escape auxiliary agent according to claim 1, characterized in that: The intercalated nano-kaolin is modified by hexadecyltrimethylammonium bromide, and the thickness of the sheet is less than or equal to 5 nm.

6. The vehicle stuck escape auxiliary agent according to claim 1, characterized in that: The length of the copper-plated carbon fiber short filaments is 0.8-1.2 mm, and the thickness of the surface coating is 50-100 nm.

7. A method for using the vehicle siltation escape auxiliary agent according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Conduct a quick on-site assessment using a spring-loaded puncture tester. If the average puncture depth at any test point is greater than 15 cm and the overall average rebound rate is less than 30%, the scenario is considered suitable and a warning sign is placed 50 cm behind the tire. Step 2: Directional spraying: Shake the tank for more than 30 seconds, install a fan-shaped diffusion nozzle, and spray the tread pattern area at a 45° elevation angle and 20 cm from the tire for 5-8 seconds in the first layer. Spray the tire-ground contact seam horizontally close to the ground for 10-12 seconds in the second layer. Step 3: Puffing process: primary puffing for 0-20 seconds, physical foaming agent dominates the volume expansion to 4-5 times, and the core temperature is monitored to be greater than 40°C; enhanced puffing for 20-60 seconds, chemical foaming agent increases porosity, and when the ambient temperature is below -10°C, wrap with a self-heating blanket; Step 4: Mechanical reinforcement operation: insert anti-slip nails vertically on the surface of the expanded body and inject 0.08MPa compressed air into the expanded body; Step 5: Gradual power escape: In the primary mode, the engine speed is controlled to ≤1500rpm and the tire rotation angle is less than 5°; in the enhanced mode, if the tire slip rate is greater than 30%, 150mL of auxiliary agent is sprayed, the differential lock is activated, and the low-speed four-wheel drive gear is switched; in the emergency mode, a traction belt with a breaking strength of ≥5 tons is inserted for external traction; Step 6: Post-processing: spray the remaining expanded body with biodegradable liquid and use a high-pressure cleaner to remove the residue in the tire gap.

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