CN109440694B - Durable anti-collision guardrail - Google Patents
Durable anti-collision guardrail Download PDFInfo
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- CN109440694B CN109440694B CN201811530806.6A CN201811530806A CN109440694B CN 109440694 B CN109440694 B CN 109440694B CN 201811530806 A CN201811530806 A CN 201811530806A CN 109440694 B CN109440694 B CN 109440694B
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- tank body
- energy absorption
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- protection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
Abstract
The invention discloses a durable anti-collision guardrail which comprises a protection plate, a protection pile and an energy absorption assembly, wherein the protection plate comprises two convex parts and a concave part, the protection plate and the protection pile are connected through the energy absorption assembly, the energy absorption assembly comprises a base, a movable column and an energy absorption tank, the energy absorption tank comprises a tank body and an energy absorption inner core, the middle part of the energy absorption inner core is foamed aluminum, microporous polyurethane balls are dispersed in the foamed aluminum, and two sides of the energy absorption inner core are polyurethane bodies. The anti-collision guardrail designed by the invention has excellent energy absorption performance, can absorb a large amount of impact energy generated when a vehicle collides with the guardrail and protect a driver of the vehicle, and simultaneously, the fracture of the guardrail does not generate a sharp corner part, so that the damage to a vehicle body in the collision process is reduced as much as possible.
Description
Technical Field
The invention belongs to the technical field of building construction materials and engineering, and particularly relates to a durable anti-collision guardrail.
Background
The causes of traffic accidents are very complex, involving three factors, human, vehicle, and road and environment. The instant process of traffic accidents is also very different. However, the forms of traffic accidents can be roughly classified into four categories: mainly comprises the collision between an automobile and an automobile, a two-wheel vehicle and a pedestrian as well as between the automobile and a fixed object, particularly a roadside dangerous object. Wherein, the fixed objects or dangerous objects on the side of the automobile collision road are common traffic accident forms and are often accident forms causing serious consequences. Roadside hazards refer to objects that cause obstacles to driving within the roadside safety range, formed naturally or constructed artificially, and mainly include natural landscapes such as ditches, lakes, rivers, and the like, and artificial structures such as embankments, cutting slopes, guardrails, curbs, signposts, guardrails, and the like. The collision between the automobile and the roadside hazard is called roadside traffic accident, which is the accident that the automobile leaves the traffic lane and collides with the roadside hazard, the automobile and the like, and also comprises the accidents of overturning, falling, rushing into the opposite lane and partial secondary traffic accidents.
The basic method for guaranteeing the road side traffic safety of the high-grade highway is to adopt certain protection facilities, and the arrangement of the anti-collision guardrail is one of the most practical and effective measures. However, in the actual use process, the existing commonly used protection plate has no buffering and energy absorbing functions, and under the strong impact force of an out-of-control automobile at high speed, the protection plate is often broken, and the out-of-control automobile rushes into an opposite lane to collide with the automobile, so that the automobile is damaged and people die; especially, the broken protective plate is more serious to hurt people, and the danger that the automobile turns into the waterproof ditches at the two sides of the highway or rushes into the opposite lane to collide can not be effectively prevented. On the other hand, the protection plate made of the steel plate is easy to be penetrated, loses the pressure resistance and the anti-collision effect and has short service life.
Disclosure of Invention
In order to solve the technical problem, the invention provides a durable anti-collision guardrail which comprises a protection plate, a protection pile and an energy absorption component, wherein the protection plate is of a wave-shaped structure and comprises two convex parts, a concave part is arranged between the two convex parts, the convex parts and the concave parts are connected in a smooth transition mode, the protection pile is arranged on the inner sides of the convex parts, two protection plates are arranged on two sides of the protection pile respectively, the protection plate and the protection pile are connected through the energy absorption component, the energy absorption component comprises a base, a moving column and an energy absorption tank, the base is of a hollow pipe structure and is fixed on the protection pile, the energy absorption tank is arranged in the base, one end of the moving column is fixed on the inner sides of the convex parts through a fixing support, the other end of the moving column extends into the base, the moving column can slide in the base, and the, The energy absorption tank comprises a tank body and an energy absorption inner core, the two ends of the tank body are open, the side wall of the tank body is of a corrugated pipe body structure, the energy absorption inner core is filled in the energy absorption tank, the middle part of the energy absorption inner core is foamed aluminum, microporous polyurethane balls are dispersed in the foamed aluminum, the two sides of the energy absorption inner core are polyurethane bodies, the polyurethane bodies are fixed at the openings at the two ends of the energy absorption tank, and the foamed aluminum is sealed in the energy absorption tank, one side of each of the two opposite protection plates is bent to form a first connecting body, the other side of each of the two opposite protection plates is bent to form a second connecting body, and the first connecting bodies can be inserted into the second connecting bodies and then fixed through bolts.
Furthermore, a rubber block is further arranged in the first connecting body, and a bolt penetrates through the rubber block, the first connecting body and the second connecting body to fasten and fix the first connecting body and the second connecting body.
Furthermore, the inner side of the concave part is provided with a reinforcing plate, two ends of the reinforcing plate respectively extend to the inner sides of the convex parts at two sides of the concave part, the middle part of the reinforcing plate is tightly leaned on the inner side of the concave part, the end part of the reinforcing plate penetrates through the side plate and extends into the packing cavity, and the end part of the reinforcing plate is provided with a second bump to prevent the reinforcing plate from being separated from the packing cavity.
Furthermore, two groups of energy absorption assemblies are further arranged on one side, deviating from the concave part, of the protection pile.
Furthermore, the fender pile is of a hollow tubular structure, a rubber layer wraps the outside of the fender pile, a fixing through hole is formed in the side wall of the fender pile, the end portion of the base extends into the fixing through hole, and the base is fixed in the fixing through hole through a connecting strip.
Furthermore, the protection plate positioned on one side of the protection pile is provided with an upper protection plate and a lower protection plate.
Further, the manufacturing method of the energy absorption tank comprises the following steps:
(1) keeping the temperature of polyurethane particles constant to 220-250 ℃, melting in an oil bath, fully stirring, pouring into a hollow aluminum sheet, and naturally cooling to room temperature;
(2) preparing an activation modified solution, wherein the activation modified solution contains cerium chloride, copper chloride, EDTA, acetic acid, citric acid and methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the activated and modified solution, keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, preserving the temperature for 30-60 min, naturally cooling the activated and modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) plugging an opening at the bottom of the tank body by using a plug, then putting industrial pure aluminum into the tank body, heating to 700-730 ℃ to melt the aluminum, adding the solid phase A into the molten aluminum, and continuously stirring the molten aluminum and uniformly mixing; after uniformly mixing, cooling the melt to 680-700 ℃, preserving heat for 5-10 min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6-10 s, quickly plugging the top opening of the tank body with a plug after preserving heat, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for more than 8 hours at 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for more than 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
Further, the concentration of each component in the activation modification solution is as follows: 3.6-5.6 g/L of cerium chloride; 10-15 g/L, EDTA 0.2.2-0.3 g/L of copper chloride, 3-5 g/L of acetic acid, 3-5 g/L of citric acid and 20-30 mL/L of methanol, and the balance of water; in the step (3), the mass of the activation modification solution is TiH2More than 5 times of the mass.
Further, the hollow aluminum sheet comprises a sheet box and a sheet cover, molten polyurethane is poured into the sheet box, then the sheet cover is quickly covered, and the hollow aluminum sheet injected with the polyurethane is obtained after cooling to the room temperature.
According to the technical scheme, the invention has the advantages that:
1. the anti-collision guardrail designed by the invention has excellent energy absorption performance, can absorb impact energy of a vehicle impacting the guardrail in a large amount and protect vehicle drivers, and meanwhile, the fracture of the guardrail can not generate a sharp corner part, so that the damage to a vehicle body in the collision process is reduced as much as possible;
2. the anti-collision guardrail has the advantages that the excellent disassembly performance of the protection plate is realized, compared with the commonly-used integrally-formed protection plate in the prior art, the anti-collision guardrail is very convenient to install and disassemble, easy to maintain after local collision deformation of the anti-collision guardrail and convenient to transport;
3. the energy absorption tank is manufactured by the self instead of the traditional energy absorption box, so that the energy absorption performance of the tank body is greatly improved, the damage to the vehicle body is obviously reduced under the condition of the same collision impact energy, and the life safety is guaranteed.
Drawings
FIG. 1 is a top cross-sectional view of the present invention;
FIG. 2 is a top sectional view of the mounting bracket;
FIG. 3 is a schematic structural view of an energy absorber assembly;
FIG. 4 is a schematic structural view of an energy absorbing canister;
FIG. 5 is a schematic view of the present invention in a front view;
FIG. 6 is a schematic view of the mounting structure of the base and the protection posts;
FIG. 7 is a schematic view of the side panel (only a partial structure of the guard plate is shown);
fig. 8 is a schematic structural diagram of a hollow aluminum sheet.
Detailed Description
The following is a detailed description with reference to examples:
as shown in figures 1-7, the durable anti-collision guardrail comprises a protection plate 1, a protection pile 2 and an energy absorption assembly. Protection plate 1 is the wave structure, and protection plate 1 contains two bellyings 3, is a depressed part 4 between two bellyings 3. The convex part 3 and the concave part 4 are connected in a smooth transition mode, no sharp corner is generated at the connecting position, and the sharp corner is prevented from stabbing a vehicle in the collision process. Fender pile 2 is located the inboard of bellying 3, the both sides of fender pile 2 all are equipped with a guard plate 1, and guard plate 2 and fender pile 2 pass through the energy-absorbing subassembly links to each other. As shown in fig. 1 and 5, two protection plates 1 and two protection piles 2 jointly form a protection fence unit, one side of each two protection plates opposite to each other in the protection fence unit is bent to form a first connecting body 22, the other side of each two protection plates opposite to each other in the protection fence unit is bent to form a second connecting body 23, and the first connecting body 22 can be inserted into the second connecting body 23 and then fixed through bolts 24. Preferably, a rubber block 25 may be further provided in the first connecting body 22, and a bolt 24 may be inserted through the rubber block 25, the first connecting body 22 and the second connecting body 23 to fasten the first connecting body and the second connecting body, so as to facilitate the fastening of the first connecting body and the second connecting body. The highway is characterized in that the guardrail units are connected end to form an integral structure of the anti-collision guardrail along the shore, and the guardrail units are detachable from each other. When the bolt 24 is rusted due to the long-term use of the guard rail unit and cannot be unscrewed, the rubber block 25 can be cut by a cutting machine, and the rubber block 25 and the bolt segment coated in the rubber block are cut off at the same time, so that the first connecting body 22 and the second connecting body 23 can be separated. As shown in fig. 3, the energy absorption assembly includes a base 5, a movable column 6 and an energy absorption tank 7, the base 5 is a hollow pipe structure, the base 5 is fixed on the fender pile 2, the fender pile 2 is a hollow tubular structure, and a rubber layer 8 is coated outside the fender pile 2, so that a certain buffering effect is achieved on violent collision. Fixing through holes 9 are formed in the side wall of the protective pile 2, the end portion of the base 5 extends into the fixing through holes 9, and the base is fixed in the fixing through holes 9 through connecting strips 10. The width of the connecting strip is optimally designed, the connecting strip is firstly broken before the protective plate is broken due to the impact force, the impact breaking capacity of the connecting strip is far smaller than that of the protective plate, the impact breaking capacity of the connecting strip is larger than that of the energy-absorbing tank 7, and the connecting strip is not broken in the impact deformation process of the energy-absorbing tank 7. Energy-absorbing jar 7 has been placed in the base 5, and the one end of removal post 6 is passed through fixed bolster 11 and is fixed in the inboard of bellying 3, and in the other end stretched into base 5, remove post 6 and can slide in base 5, when the bellying 3 received the impact force in the outside, guard plate 1 drove the energy-absorbing jar that crushes that removes post 6 slip, carries out the absorption of certain degree to the impact energy. The fixing bracket 11 includes a side plate 12, a bottom plate 13 and a top plate 14, both sides of the side plate 12 are welded to the inner side of the boss 3 so that the side plate 12 is fixed to the shield plate, and a packing chamber is formed between the side plate 12 and the shield plate 1. The welding of the lower part in filler cavity has bottom plate 13, and the welding of the upper portion in filler cavity has roof 14, has seted up first through-hole 15 on the curb plate 12, and removal post 6 passes first through-hole 15 and stretches into the filler intracavity, and the tip of removal post 6 is equipped with first lug 16 and prevents to remove the post and deviate from in first through-hole, and the filler intracavity is filled with billet 17 for the terminal of removing post 6 can not follow the interior salient and injure vehicle or personnel in protection plate 1 when receiving the impact in protection plate 1.
Generally speaking, any energy absorption box in the prior art can be adopted as the energy absorption tank provided by the invention, and a certain energy absorption effect can be achieved, but experiments and comparisons show that the energy absorption effect of a common energy absorption box is poor, and the usability of the energy absorption box needs to be improved. Therefore, the energy-absorbing tank is researched and designed and comprises a tank body 18 and an energy-absorbing inner core, two ends of the tank body 18 are open, the side wall of the tank body 18 is of a corrugated pipe body structure, and a crushing direction is provided in the impact process. The energy-absorbing inner core is filled in the tank body 18, the middle part of the energy-absorbing inner core is foamed aluminum 19, microporous polyurethane balls 20 are dispersed in the foamed aluminum, polyurethane bodies 21 are arranged on two sides of the energy-absorbing inner core, and the polyurethane bodies 21 are fixed at openings at two ends of the tank body 18 to encapsulate the foamed aluminum 19 in the tank body 18.
The manufacturing method of the energy absorption tank comprises the following steps:
(1) keeping the temperature of polyurethane particles constant to 220-250 ℃, melting in an oil bath, fully stirring, pouring into the hollow aluminum sheet 26, and naturally cooling to room temperature; the invention designs a hollow aluminum sheet independently, as shown in fig. 8, the hollow aluminum sheet 26 comprises a sheet box 27 and a sheet cover 28, a bolt is integrally formed on the sheet box 27, a jack is processed on the sheet cover, molten polyurethane is injected into the sheet box 28, then the sheet cover 28 is quickly covered, and the hollow aluminum sheet injected with polyurethane is obtained after cooling to room temperature. Generally, the size of the hollow aluminum sheet is smaller, the diameter is less than or equal to 1cm, and the thickness is less than or equal to 0.8 cm;
(2) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 3.6-5.6 g/L of cerium chloride; 10-15 g/L, EDTA 0.2.2-0.3 g/L of copper chloride, 3-5 g/L of acetic acid, 3-5 g/L of citric acid and 20-30 mL/L of methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the TiH 25 times or more of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 30-60 min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) plugging an opening at the bottom of the tank body by using a plug (the plug can be made of high-temperature-resistant ceramic material), then putting industrial pure aluminum into the tank body, heating to 700-730 ℃ to melt the aluminum, adding the solid phase A into the molten aluminum, and continuously stirring the molten aluminum and uniformly mixing; after uniformly mixing, cooling the melt to 680-700 ℃, preserving heat for 5-10 min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6-10 s, quickly plugging the top opening of the tank body with a plug after preserving heat, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for more than 8 hours at 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for more than 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
Preferably, a reinforcing plate 29 is arranged on the inner side of the concave part 4, two ends of the reinforcing plate 29 respectively extend to the inner sides of the convex parts on two sides of the concave part, the middle part of the reinforcing plate 29 is abutted against the inner side of the concave part 4, the end part of the reinforcing plate penetrates through the side plate and extends into the filling cavity, the reinforcing plate is fixedly pressed in the filling cavity by a wood block 17, and the end part of the reinforcing plate 29 is provided with a second lug 30 to prevent the reinforcing plate from being pulled out of the filling cavity. When a vehicle collides from the concave part 4 to the crash barrier, the reinforcing plate 29 can support the concave part, and the impact force received by the concave part 4 is dispersed to the inner sides of the convex parts at two sides through the reinforcing plate, so that the impact force can be absorbed through the energy absorption component part. One side of the fender pile 2 deviating from the concave part 4 is also provided with two groups of energy-absorbing components 31, and the two groups of energy-absorbing components are designed for absorbing lateral impact force: when the vehicle is not suddenly turned to impact the crash barrier but slowly approaches and impacts the crash barrier (such as fatigue driving), the impact position of the vehicle and the crash barrier is often at the side of the convex part 3, so that the side of the fender pile 2, which is far away from the concave part 4, is further provided with an energy absorption assembly for absorbing the impact force at the side of the convex part. The guard plate that is located fender pile one side is equipped with upper and lower two, and this kind of design also is in order to slowly be close to and when striking anticollision barrier when the vehicle, plays the collision reduction protecting effect to wheel and automobile body simultaneously, avoids the impact to the automobile body harm too big and cause the harm too big to personnel.
When the wheels impact the anti-collision guardrail, the two conditions are divided according to the impact force: when the impact force is slight, the protective plate is deformed by the vehicle, the bulge transmits the impact force to the movable column, so that the movable column crushes the energy-absorbing tank to partially absorb the impact force, the impact force is small, the breakage of the connecting strip is not enough, the breakage of the protective plate is not enough, and the condition that the energy-absorbing assembly protrudes out of the protective plate to damage the vehicle is avoided; when the impact is great, the vehicle causes the guard plate to warp, the bellying transmits the impact for removing the post conquassation energy-absorbing jar and carries out partial absorption to the impact, the impact is enough to make the connecting strip fracture simultaneously, the connecting strip fracture back base 5 passes through fixing hole 9 and makes whole energy-absorbing subassembly fall into in the hollow structure of fender pile, the guard plate is because the impact hugs closely on the rubber layer 8 of fender pile surface, the outstanding guard plate of energy-absorbing subassembly can not take place yet and cause the condition of damage vehicle, vehicle and personnel's safety has been protected.
According to the invention, the excellent energy absorption performance of the energy absorption tank is verified through a comparison experiment, the following experiment groups are designed, the tank bodies of the energy absorption tanks used by the experiment groups are the same, the maximum diameter of the energy absorption tank is 15.28 +/-1 cm, and the minimum diameter of the energy absorption tank is 11.77 +/-1 cm:
example 1
A manufacturing method of an energy absorption tank comprises the following steps:
(1) keeping the polyurethane particles at constant temperature to 220 ℃, melting in oil bath, fully stirring, pouring into a hollow aluminum sheet, and naturally cooling to room temperature;
(2) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 3.6g/L of cerium chloride; 10 g/L of copper chloride, 3g/L of acetic acid, 3g/L of citric acid and 20mL/L of methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the TiH 25 times of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 30min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) the bottom opening of the tank body is blocked by a plug (the plug can be made of high-temperature-resistant ceramic material), then industrial pure aluminum is put into the tank body, the temperature is raised to 700 ℃ to melt the aluminum, the solid phase A is added into the molten aluminum, and the molten aluminum is continuously stirred and uniformly mixed; after uniformly mixing, cooling the melt to 680 ℃, preserving heat for 5min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6s, quickly plugging the top opening of the tank body after preserving heat, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
Example 2
A manufacturing method of an energy absorption tank comprises the following steps:
(1) keeping the polyurethane particles at constant temperature to 240 ℃, melting in oil bath, fully stirring, pouring into a hollow aluminum sheet, and naturally cooling to room temperature;
(2) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 4.5g/L of cerium chloride; 12g/L of copper chloride, 4g/L of acetic acid, 4g/L of citric acid and 30mL/L of methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the TiH 25 times of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 50min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) the bottom opening of the tank body is blocked by a plug (the plug can be made of high-temperature-resistant ceramic material), then industrial pure aluminum is put into the tank body, the temperature is raised to 720 ℃ to melt the aluminum, the solid phase A is added into the molten aluminum, and the molten aluminum is continuously stirred and uniformly mixed; cooling the melt to 690 ℃ after uniform mixing, preserving heat for 8min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6s, quickly plugging the top opening of the tank body after heat preservation, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
Example 3
A manufacturing method of an energy absorption tank comprises the following steps:
(1) keeping the polyurethane particles at the constant temperature of 250 ℃ for oil bath melting, fully stirring, pouring into a hollow aluminum sheet, and naturally cooling to room temperature;
(2) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 5.6g/L of cerium chloride; 15 g/L of copper chloride, 5g/L of acetic acid, 5g/L of citric acid and 30mL/L of methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the TiH 25 times of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 60min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) the bottom opening of the tank body is blocked by a plug (the plug can be made of high-temperature-resistant ceramic material), then industrial pure aluminum is put into the tank body, the temperature is raised to 730 ℃ to melt the aluminum, the solid phase A is added into the molten aluminum, and the molten aluminum is continuously stirred and uniformly mixed; cooling the melt to 700 ℃ after uniform mixing, preserving heat for 10min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6s, quickly plugging the top opening of the tank body after heat preservation, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
Comparative example 1
A manufacturing method of an energy absorption tank comprises the following steps: and sealing one end opening of the tank body, keeping the temperature of the polyurethane particles constant to 240 ℃, melting in oil bath, fully stirring, pouring the mixture into the tank body, filling the tank body with the mixture, and naturally cooling to room temperature to obtain the energy absorption tank of the comparative example.
Comparative example 2
A manufacturing method of an energy absorption tank comprises the following steps:
(1) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 4.5g/L of cerium chloride; 12g/L of copper chloride, 4g/L of acetic acid, 4g/L of citric acid and 30mL/L of methanol, and the balance of water;
(2) mix TiH2Soaking the activated and modified solution in the TiH 25 times of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 50min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(3) the bottom opening of the tank body is blocked by a plug (the plug can be made of high-temperature-resistant ceramic material), then industrial pure aluminum is put into the tank body, the temperature is raised to 720 ℃ to melt the aluminum, the solid phase A is added into the molten aluminum, and the molten aluminum is continuously stirred and uniformly mixed; after the mixture is uniformly mixed, cooling the melt to 690 ℃, preserving heat for 8min, quickly plugging the top opening of the tank body by using a plug after the heat preservation, and immersing the whole tank body in water to cool the tank body to room temperature;
(4) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank of the comparative example.
Comparative example 3
A manufacturing method of an energy absorption tank comprises the following steps:
(1) preparing an activation modification solution, wherein the concentration of each component in the activation modification solution is as follows: 4.5g/L of cerium chloride; 12g/L of copper chloride, 4g/L of acetic acid, 4g/L of citric acid and 30mL/L of methanol, and the balance of water;
(2) mix TiH2Soaking in the activating agentIn the modified solution, the mass of the activated modified solution is TiH 25 times of the mass, so that the amount of the activation modification solution is sufficient. Keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, keeping the temperature for 50min, naturally cooling the activated modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(3) sealing one end opening of the tank body, then putting the industrial pure aluminum into the tank body, heating to 720 ℃ to melt the aluminum to fill the whole tank body, adding the solid phase A into the molten aluminum, and continuously stirring the molten aluminum and uniformly mixing; and cooling the melt to 690 ℃ after uniform mixing, preserving heat for 8min, quickly sealing the top of the tank body after heat preservation, and immersing the whole tank body in water to cool to room temperature to obtain the energy absorption tank of the comparative example.
Example 4
The energy absorption performance of the energy absorption tanks prepared in the examples 1-3 and the comparative examples 1-3 is tested, and the crushing rate is 70% of the original length of the energy absorption tank; the crushing times were the same and were set at 0.5s, and the measured absorption energy values are shown in table 1.
TABLE 1
As can be seen from Table 1, the self-made energy-absorbing tank provided by the invention replaces a traditional energy-absorbing box, so that the energy-absorbing performance of the tank body is greatly improved, the energy-absorbing performance is remarkably improved under the condition of the same collision impact energy, the damage to a vehicle body in the actual collision process is obviously reduced, and the life safety is guaranteed.
The technical solutions provided by the present invention are described in detail above, and for those skilled in the art, the ideas according to the embodiments of the present invention may be changed in the specific implementation manners and the application ranges, and in summary, the content of the present description should not be construed as limiting the present invention.
Claims (9)
1. A durable anti-collision guardrail is characterized by comprising a protection plate, a protection pile and an energy absorption assembly, wherein the protection plate is of a wave-shaped structure and comprises two protrusions, a concave part is arranged between the two protrusions, the protrusions and the concave parts are connected in a smooth transition mode, the protection pile is arranged on the inner side of each protrusion, two sides of the protection pile are respectively provided with the protection plate, the protection plate and the protection pile are connected through the energy absorption assembly, the energy absorption assembly comprises a base, a moving column and an energy absorption tank, the base is of a hollow pipe body structure and is fixed on the protection pile, the energy absorption tank is arranged in the base, one end of the moving column is fixed on the inner side of each protrusion through a fixing support, the other end of the moving column stretches into the base, the moving column can slide in the base, the fixing support comprises a side plate, a bottom plate and a, the two sides of the side plate are welded on the inner side of the protruding portion, so that the side plate is fixed on the protection plate, a packing cavity is formed between the side plate and the protection plate, the bottom plate is welded on the lower portion of the packing cavity, a top plate is welded on the upper portion of the packing cavity, a first through hole is formed in the side plate, the moving column penetrates through the first through hole and extends into the packing cavity, a first lug is arranged at the end portion of the moving column to prevent the moving column from falling out of the first through hole, a wood block is filled in the packing cavity, the energy absorption tank comprises a tank body and an energy absorption inner core, the two ends of the tank body are open, the side wall of the tank body is of a corrugated pipe body structure, the energy absorption inner core is filled in the tank body, the middle of the energy absorption inner core is foamed aluminum, microporous polyurethane balls are dispersed in the foamed aluminum, the two sides of the energy absorption inner core, one side of each of the two opposite protection plates is bent to form a first connecting body, the other side of each of the two opposite protection plates is bent to form a second connecting body, and the first connecting bodies can be inserted into the second connecting bodies and then fixed through bolts.
2. The durable crash barrier as recited in claim 1, wherein a rubber block is further disposed in the first connecting body, and a bolt is inserted through the rubber block, the first connecting body and the second connecting body to fasten the first connecting body and the second connecting body.
3. The durable crash barrier as recited in claim 1, wherein a reinforcing plate is disposed inside the recessed portion, two ends of the reinforcing plate extend to the inner sides of the protruding portions on two sides of the recessed portion, the middle portion of the reinforcing plate abuts against the inner side of the recessed portion, the ends of the reinforcing plate extend into the filling cavity through the side plates, and the ends of the reinforcing plate are provided with second protrusions to prevent the reinforcing plate from being removed from the filling cavity.
4. A durable crash barrier according to claim 1 wherein said fender post is further provided with two sets of energy absorbing members on a side thereof facing away from said recess.
5. The durable anti-collision guardrail of claim 1, wherein the fender pile is of a hollow tubular structure, the outer part of the fender pile is coated with a rubber layer, the side wall of the fender pile is provided with a fixing through hole, the end part of the base extends into the fixing through hole, and the base is fixed in the fixing through hole through a connecting strip.
6. A durable crash barrier as in claim 1 wherein said guard plate on one side of said pile is provided with upper and lower pairs of guard plates.
7. The durable crash barrier of claim 1, wherein said energy absorbing tank is manufactured by a method comprising:
(1) keeping the temperature of polyurethane particles constant to 220-250 ℃, melting in an oil bath, fully stirring, pouring into a hollow aluminum sheet, and naturally cooling to room temperature;
(2) preparing an activation modified solution, wherein the activation modified solution contains cerium chloride, copper chloride, EDTA, acetic acid, citric acid and methanol, and the balance of water;
(3) mix TiH2Soaking the activated and modified solution in the activated and modified solution, keeping the temperature at 80-90 ℃, continuously stirring the solution by using a platinum sheet in the constant temperature process, preserving the temperature for 30-60 min, naturally cooling the activated and modified solution to room temperature, and carrying out solid-liquid separation to obtain a solid phase A;
(4) plugging an opening at the bottom of the tank body by using a plug, then putting industrial pure aluminum into the tank body, heating to 700-730 ℃ to melt the aluminum, adding the solid phase A into the molten aluminum, and continuously stirring the molten aluminum and uniformly mixing; after uniformly mixing, cooling the melt to 680-700 ℃, preserving heat for 5-10 min, then quickly pouring the hollow aluminum sheet injected with polyurethane into the melt, stirring the melt and preserving heat for 6-10 s, quickly plugging the top opening of the tank body with a plug after preserving heat, and immersing the whole tank body in water to cool the tank body to room temperature;
(5) opening a plug at the top of the tank body, pouring liquid polyurethane into the tank body, and then putting the tank body into a drying oven to be cured for more than 8 hours at 80 ℃; and removing the plug at the bottom of the tank body, pouring liquid polyurethane into the bottom of the tank body, and putting the tank body into a drying oven to be cured for more than 8 hours at the temperature of 80 ℃ to obtain the energy-absorbing tank.
8. The durable crash barrier of claim 7 wherein the concentration of each component in the activation modification solution is: 3.6-5.6 g/L of cerium chloride; 10-15 g/L, EDTA 0.2.2-0.3 g/L of copper chloride, 3-5 g/L of acetic acid, 3-5 g/L of citric acid and 20-30 mL/L of methanol, and the balance of water; in the step (3), the mass of the activation modification solution is TiH2More than 5 times of the mass.
9. The durable crash barrier as recited in claim 7, wherein said hollow aluminum sheet comprises a box and a cover, and polyurethane is poured into the box in a molten state, and then the cover is rapidly closed, and cooled to room temperature to obtain the polyurethane-impregnated hollow aluminum sheet.
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| CN201811530806.6A CN109440694B (en) | 2018-12-14 | 2018-12-14 | Durable anti-collision guardrail |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811530806.6A CN109440694B (en) | 2018-12-14 | 2018-12-14 | Durable anti-collision guardrail |
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| CN109440694B true CN109440694B (en) | 2021-01-19 |
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| CN107090790A (en) * | 2017-04-28 | 2017-08-25 | 华中科技大学 | A kind of flexible honeycomb structural collision protection device |
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| KR20040052861A (en) * | 2004-05-11 | 2004-06-23 | 김길평 | Collision prevention apparatus of vehicle for road |
| CN1990957A (en) * | 2005-12-26 | 2007-07-04 | 株式会社花井制作所 | Tracing bump energy obsorbing device |
| CN204919309U (en) * | 2015-09-07 | 2015-12-30 | 西安中交土木科技有限公司 | Pier adheres to formula consuming excessive quantities of energy and resources safety protection structure |
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| CN109440694A (en) | 2019-03-08 |
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