CN113774762B - Paver for improving self-repairing effect of conductive asphalt concrete and using method - Google Patents
Paver for improving self-repairing effect of conductive asphalt concrete and using method Download PDFInfo
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- CN113774762B CN113774762B CN202111215448.1A CN202111215448A CN113774762B CN 113774762 B CN113774762 B CN 113774762B CN 202111215448 A CN202111215448 A CN 202111215448A CN 113774762 B CN113774762 B CN 113774762B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4866—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing
- E01C19/4873—Apparatus designed for railless operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
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- Road Paving Structures (AREA)
- Road Repair (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a paver for improving self-repairing effect of conductive asphalt concrete and a using method thereof, the paver comprises an electromagnet hopper, a spiral distributor box body and a screed mechanism which are arranged from left to right, the spiral distributor box body is provided with an induction heating mechanism, the screed mechanism is provided with an electromagnet dispersing mechanism, a permanent magnet dispersing mechanism and a bottom plate, the structural material of the paver is non-ferromagnetic material, the induction heating mechanism comprises a coil, a temperature sensor and an air-cooled induction heating power supply, the coil is arranged at the bottom of the spiral distributor box body, an insulator shell is arranged outside the coil, the coil is connected to the air-cooled induction heating power supply, the temperature sensor is fixed on the inner wall of the spiral distributor box body, and the electromagnet dispersing mechanism comprises an electromagnet screed. The invention effectively improves the dispersion effect of the conductive material and prevents temperature segregation, thereby enhancing the self-repairing effect of the conductive asphalt concrete.
Description
Technical Field
The invention belongs to the field of road engineering construction, and particularly relates to a paver for improving the self-repairing effect of conductive asphalt concrete and a using method thereof.
Background
Asphalt is a self-repairing material, and when the temperature is high, the asphalt flows to microcracks spontaneously under the action of capillary force, so that the cracks are self-repaired. However, thermal oxidation aging and ultraviolet aging can occur in the mixing, paving, compacting and service processes of the asphalt mixture, so that the asphalt becomes hard, the flow capacity of a capillary tube is gradually reduced, the self-repairing performance of cracks is lost, the service performance of the asphalt pavement is greatly influenced, and the service life of the asphalt pavement is shortened. The working principle of the conductive asphalt concrete is that a certain amount of conductive materials such as graphite, carbon fiber and the like are added into common asphalt concrete, so that the asphalt concrete becomes a conductor with good conductive performance. And a power supply is connected to the outside of the conductive asphalt concrete, and the temperature of the conductive asphalt concrete is increased based on the electromagnetic induction heating principle, so that the crack is healed.
However, the existing conductive asphalt concrete has the disadvantages that due to the aggregation phenomenon of carbon fibers and the influence of factors such as the feeding position and the stirring time in the stirring process during the stirring process, the distribution of graphite and carbon fibers in the conductive asphalt concrete has large nonuniformity, so that the temperature longitudinal distribution gradient exists in the electromagnetic induction heating process, and the self-repairing effect is seriously influenced. Therefore, a method and a device for improving the dispersibility of the conductive material in the self-repairing conductive asphalt concrete are needed to reduce the problem of carbon fiber agglomeration, so that the overall temperature distribution in the repairing range is uniform, and the self-repairing effect is improved.
Disclosure of Invention
The invention aims to provide a method and a device for improving the dispersibility of a conductive material in self-repairing conductive asphalt concrete, and solves the problem that the self-repairing effect is influenced by the longitudinal temperature distribution gradient during induction heating caused by uneven dispersion of graphite and carbon fibers in the conventional self-repairing conductive asphalt concrete.
A paver for improving the self-repairing effect of conductive asphalt concrete comprises an electromagnet hopper, a spiral distributor box and a screed mechanism, wherein the screed mechanism is arranged from left to right;
the electromagnet dispersing mechanism comprises an electromagnet ironing plate, the electromagnet ironing plate comprises a silicon steel sheet laminated iron core, an excitation coil, a magnet yoke and a steel shell, the silicon steel sheet laminated iron core is arranged in the steel shell, the magnet yoke is arranged at the top of the silicon steel sheet laminated iron core, and the excitation coil is arranged on the outer side face of the silicon steel sheet laminated iron core;
the electromagnet hopper comprises an electromagnet hopper wall, a temperature sensor, an electromagnetic vibrator, a stirring device and a heating pipe mechanism, wherein the electromagnet hopper wall is the same as the inner structure of the electromagnet ironing plate, the heating pipe mechanism comprises a heating pipe mechanism outer wall and a heating pipe mechanism heating pipe, and the heating pipe mechanism heating pipe is arranged inside the heating pipe mechanism outer wall.
Preferably, the induction heating mechanism comprises a coil, a temperature sensor and an air-cooled induction heating power supply, the coil is arranged at the bottom of the spiral distributor box body, an insulator shell is arranged outside the coil, the coil is connected to the air-cooled induction heating power supply, and the temperature sensor is fixed on the inner wall of the spiral distributor box body.
Preferably, permanent magnet dispersion mechanism includes ENH shelves neodymium iron boron magnetism iron boron magnet main vibrating beam, the vice vibrating beam of ENH shelves neodymium iron boron magnetism iron boron, vibrating shaft, eccentric shaft and box, and the eccentric shaft setting is in the box top, and the vibrating shaft lower extreme is equipped with ENH shelves neodymium iron boron magnetism iron boron magnet main vibrating beam and the vice vibrating beam of ENH shelves neodymium iron boron magnetism iron boron.
The use method of the paver for improving the self-repairing effect of the conductive asphalt concrete comprises the following steps:
s1: in the process of paving the conductive asphalt concrete, a heating pipe at the hopper part is started to preheat the hopper, and the temperature is monitored by a temperature sensor;
s2: when the temperature of the hopper is higher than the minimum construction temperature, feeding is started, and an electromagnet and an electromagnetic vibrator are started simultaneously;
s3: electrifying a coil at the box body part of the spiral distributor, continuously introducing alternating current with the frequency of 30-50 kHZ, and heating the conductive asphalt concrete; meanwhile, the temperature of the conductive asphalt concrete is continuously monitored to be not lower than the minimum construction temperature through a temperature sensor;
s4: turning on an electromagnet ironing plate and a vibrating mechanism in the ironing plate mechanism of the paver; alternating current is continuously supplied to the electromagnet ironing plate, and the conductive asphalt concrete is vibrated by the ENH grade neodymium iron boron magnet main and auxiliary vibrating beams in the vibrating mechanism.
Preferably, according to the scheme, the carbon fibers in the conductive asphalt concrete are 7-11 mm short pitch-based carbon fibers, the mixing amount is 0.2-0.5%, the graphite is flake graphite with the radius of 2-5 mm, and the mixing amount is 15-25%.
Preferably, according to the scheme, part of the aggregate in the conductive asphalt concrete is replaced by the steel slag, the steel slag accounts for 40-50% of the weight of the aggregate, and the iron content in the steel slag is 2-3%, so that the steel slag cannot be adsorbed by the electromagnet.
Preferably, in the step S4, the operating temperature of the type of the ndfeb magnet is 180 ℃ to 200 ℃, the magnetic field strength of the ndfeb magnet is about 1.3 tesla to 1.4 tesla, and the magnetic field strength of the electromagnet is more than 1.3 tesla.
Compared with the prior art, the invention provides the paver for improving the self-repairing effect of the conductive asphalt concrete and the using method thereof, and the paver has the following beneficial effects:
1. the invention utilizes the principle of diamagnetism of graphite and carbon fiber, and the graphite and the carbon fiber move along the direction opposite to the magnetic field direction through the permanent magnet magnetic field mechanism and the electromagnet magnetic field mechanism. One part of the agglomerated carbon fibers cannot move under the blocking of the aggregates, the other part of the agglomerated carbon fibers move against a magnetic field, and the vibration effect in the full-paving stage is added, so that the dispersing effect is greatly improved.
2. According to the invention, the graphite and the carbon fiber are uniformly distributed in the conductive asphalt concrete in the transverse and longitudinal directions by improving the dispersibility of the graphite and the carbon fiber, so that the uniform overall temperature distribution in a repair range is ensured when the induction heating self-repair technology is used for repairing pavement cracks subsequently, and the self-repair effect is improved.
3. When the spiral distributor disclosed by the invention is used for spraying the conductive asphalt concrete, the temperature of the conductive asphalt concrete can be monitored and heated in real time through the induction heating mechanism, and the problem that the conductive asphalt concrete cannot be paved or the paving effect is poor in a low-temperature environment is solved.
4. Compared with the traditional method for dispersing the fibrous conductive material, the method for dispersing the carbon fiber by using the magnetic field and the diamagnetism principle provides a new thought for dispersing the fibrous conductive material and reducing the agglomeration problem, and has positive significance.
5. The current of the electromagnet is changed, the magnetic field intensity is changed, and the magnitude of the diamagnetic force is controlled, so that the motion tracks of the graphite and the carbon fiber can be directionally controlled.
6. Compared with the traditional paver, the invention utilizes the electromagnetic vibrator of the hopper to generate the vibration effect, thereby facilitating the blanking. Simultaneously, hopper agitating unit has solved the problem that traditional paver coarse aggregate causes the segregation to both sides gathering.
7. Compared with the traditional paver, the invention preheats the hopper by using the heating pipe in the hopper, improves the temperature of the hopper and avoids the segregation of the conductive asphalt concrete close to the inner wall of the hopper due to the sudden temperature drop.
8. Compared with the traditional spreading machine, the laminated neodymium iron boron magnet vibrating beam is adopted, so that the magnetic field intensity is enhanced while the vibrating effect is ensured. Under the double action of strong magnetic field and vibration, the graphite and carbon fiber are further dispersed.
9. Compared with the traditional method for dispersing the conductive material in the preparation process, the method provided by the invention has the advantages that the conductive material is dispersed by using the paver in the construction process, the dispersion effect can be further enhanced, and the dispersion rate is improved.
Therefore, the invention effectively improves the dispersion effect of the conductive material and prevents temperature segregation, thereby enhancing the self-repairing effect of the conductive asphalt concrete.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the auger distribution box and the electromagnet ironing plate of the present invention;
FIG. 3 is a three-dimensional view of an induction heating mechanism of the present invention;
FIG. 4 is a schematic structural view of a screed mechanism of the present invention;
FIG. 5 is a schematic structural view of the electromagnet dispersion mechanism;
FIG. 6 is a schematic structural view of a permanent magnet dispersing mechanism;
FIG. 7 is a schematic diagram of the construction of an electromagnet hopper;
FIG. 8 is a schematic structural view of a heating tube mechanism;
fig. 9 is a flow chart of a method of using a paver to improve the self-healing effect of conductive asphalt concrete.
In the figure: 1. a spiral distributing device box body, 2, a screed plate mechanism, 3, an induction heating mechanism, 3-1, a coil, 3-2, an insulator shell, 3-3, a temperature sensor, 3-4, an air-cooled induction heating power supply, 4, an electromagnet dispersing mechanism, 5, an electromagnet screed plate, 5-1, a silicon steel sheet laminated iron core, 5-2, an excitation coil, 5-3, a magnet yoke, 5-4, a steel shell, 6, a permanent magnet dispersing mechanism, 6-1, an ENH grade neodymium iron boron magnet main vibrating beam, 6-2, an ENH grade neodymium iron boron magnet auxiliary vibrating beam, 6-3, a vibrating shaft, 6-4, an eccentric shaft, 6-5, a box body, 7, an electromagnet hopper, 7-1, an electromagnet hopper wall, 7-2, a temperature sensor, 7-3 and an electromagnetic vibrator, 7-4 parts of a stirring device, 7-5 parts of a heating pipe mechanism, 7-5-1 parts of an outer wall of the heating pipe mechanism, 7-5-2 parts of a heating pipe of the heating pipe mechanism, 8 parts of a bottom plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The invention is further described with reference to the following drawings and detailed description:
example one
In this embodiment, according to fig. 1 to 8, a paver and a method of use for improving the self-repairing effect of conductive asphalt concrete accomplish the dispersion of conductive materials in the self-repairing conductive asphalt concrete according to the following procedures:
the paver material adopts non-ferromagnetic material aluminum, the self-repairing conductive asphalt concrete adopts No. 110 asphalt, wherein the carbon fiber is 9mm short pitch-based carbon fiber, the mixing amount is 0.3%, the graphite is crystalline flake graphite, the radius is 0.2-0.3 cm, and the mixing amount is 20%. The spreading speed in the spreading process is 2 m/min.
Firstly, in order to reduce the viscosity and increase the fluidity of the conductive asphalt concrete, the wall 7-1 of the electromagnet hopper, the heating pipe 7-5-2 and the electromagnetic vibrator 7-3 in the electromagnet hopper 7 are started, and the temperature of the conductive asphalt concrete is heated to 160 ℃ by monitoring through the temperature sensor 7-2. Under the dual action of the magnetic field and the vibration, the graphite and the carbon fiber move for the first time based on the diamagnetism of the graphite and the carbon fiber.
And secondly, conveying the conductive asphalt concrete to a spiral distributor box body 1, starting an air-cooled induction heating power supply 3-4, introducing alternating current to a bottom coil 3-1, generating an alternating magnetic field around the coil 3-1, monitoring by a temperature sensor 3-3, and heating the conductive asphalt concrete to 160 ℃.
Then, when the spiral distributor case 1 delivers the conductive asphalt concrete to the screed mechanism 2, the permanent magnet dispersing mechanism 6 is turned on. Meanwhile, the ENH grade neodymium iron boron magnet main vibrating beam 6-1 and the ENH grade neodymium iron boron magnet auxiliary vibrating beam 6-2 synchronously vibrate under the action of the vibrating shaft 6-3, and the double effects of a magnetic field and vibration are continuously provided for the conductive asphalt concrete, so that the paving is finally completed.
Example two
In this embodiment, according to fig. 1 to 8, a paver and a use method for improving a self-repairing effect of conductive asphalt concrete complete the dispersion of a conductive material in the self-repairing conductive asphalt concrete according to the following procedures:
the paver is made of a non-ferromagnetic material, namely aluminum, and the self-repairing conductive asphalt concrete is made of No. 90 asphalt, wherein the carbon fiber is 11mm short pitch-based carbon fiber, the mixing amount is 0.3%, the graphite is flake graphite, the radius is 0.3-0.4 cm, and the mixing amount is 18%. The spreading speed in the spreading process is 2 m/min.
Firstly, in order to reduce the viscosity and increase the fluidity of the conductive asphalt concrete, the wall 7-1 of the electromagnet hopper, the heating pipe 7-5-2 and the electromagnetic vibrator 7-3 in the electromagnet hopper 7 are started, and the temperature of the conductive asphalt concrete is heated to 170 ℃ by monitoring through the temperature sensor 7-2. Under the dual action of the magnetic field and the vibration, the graphite and the carbon fiber move for the first time based on the diamagnetism of the graphite and the carbon fiber.
And secondly, conveying the conductive asphalt concrete to a spiral distributor box body 1, starting an air-cooled induction heating power supply 3-4, introducing alternating current to a bottom coil 3-1, generating an alternating magnetic field around the coil 3-1, monitoring by a temperature sensor 3-3, and heating the conductive asphalt concrete to 170 ℃.
Then, the permanent magnet dispersing mechanism 6 is turned on while the conductive asphalt concrete is transferred to the screed mechanism 2 by the auger distributor. Meanwhile, the ENH grade neodymium iron boron magnet main vibrating beam 6-1 and the ENH grade neodymium iron boron magnet auxiliary vibrating beam 6-2 synchronously vibrate under the action of the vibrating shaft 6-3, and the double effects of a magnetic field and vibration are continuously provided for the conductive asphalt concrete, so that the paving is finally completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides an improve paver of electrically conductive asphalt concrete selfreparing effect, includes that electro-magnet hopper (7), spiral distributing device box (1) and screed mechanism (2) set up from left to right, its characterized in that: the spiral material distributor box body (1) is provided with an induction heating mechanism (3), the ironing plate mechanism (2) is provided with an electromagnet dispersing mechanism (4), a permanent magnet dispersing mechanism (6) and a bottom plate (8), and the structural material of the paver is a non-ferromagnetic material;
the electromagnet dispersing mechanism (4) comprises an electromagnet ironing plate (5), the electromagnet ironing plate (5) comprises a silicon steel sheet laminated iron core (5-1), an excitation coil (5-2), a magnet yoke (5-3) and a steel shell (5-4), the silicon steel sheet laminated iron core (5-1) is arranged in the steel shell (5-4), the magnet yoke (5-3) is arranged at the top of the silicon steel sheet laminated iron core (5-1), and the excitation coil (5-2) is arranged on the outer side of the silicon steel sheet laminated iron core (5-1);
the heating device is characterized in that the electromagnet hopper (7) comprises an electromagnet hopper wall (7-1), a temperature sensor (7-2), an electromagnetic vibrator (7-3), a stirring device (7-4) and a heating pipe mechanism (7-5), the electromagnet hopper wall (7-1) is identical to the inner structure of the electromagnet ironing plate (5), the heating pipe mechanism (7-5) comprises a heating pipe mechanism outer wall (7-5-1) and a heating pipe (7-5-2) of the heating pipe mechanism, and the heating pipe (7-5-2) of the heating pipe mechanism is arranged inside the heating pipe mechanism outer wall (7-5-1).
2. The paver of claim 1 for improving the self-repair effect of conductive asphalt concrete, characterized in that: the induction heating mechanism (3) comprises a coil (3-1), a temperature sensor (3-3) and an air-cooled induction heating power supply (3-4), the coil (3-1) is arranged at the bottom of the spiral distributor box body (1), an insulator shell (3-2) is arranged outside the coil (3-1), the coil (3-1) is communicated with the air-cooled induction heating power supply (3-4), and the temperature sensor (3-3) is fixed on the inner wall of the spiral distributor box body (1).
3. The paver of claim 1 for improving the self-repair effect of conductive asphalt concrete, characterized in that: the permanent magnet dispersing mechanism (6) comprises a vibrating shaft (6-3), an eccentric shaft (6-4) and a box body (6-5), the eccentric shaft (6-4) is arranged above the box body (6-5), and an ENH grade neodymium iron boron magnet main vibrating beam (6-1) and an ENH grade neodymium iron boron magnet auxiliary vibrating beam (6-2) are arranged at the lower end of the vibrating shaft (6-3).
4. The use method of the paver for improving the self-repairing effect of the conductive asphalt concrete is characterized by comprising the following steps of:
s1: in the process of paving the conductive asphalt concrete, a heating pipe at the hopper part is started to preheat the hopper, and the temperature is monitored by a temperature sensor;
s2: when the temperature of the hopper is higher than the minimum construction temperature, feeding is started, and an electromagnet and an electromagnetic vibrator are started simultaneously;
s3: electrifying a coil at the box body part of the spiral distributor, continuously introducing alternating current with the frequency of 30-50 kHZ, and heating the conductive asphalt concrete; meanwhile, the temperature of the conductive asphalt concrete is continuously monitored to be not lower than the minimum construction temperature through a temperature sensor;
s4: opening an electromagnet ironing plate and a vibrating mechanism in the ironing plate mechanism of the paver; alternating current is continuously supplied to the electromagnet ironing plate, and the conductive asphalt concrete is vibrated by the ENH grade neodymium iron boron magnet main and auxiliary vibrating beams in the vibrating mechanism.
5. The use method of the paver according to claim 4 for improving the self-repairing effect of the conductive asphalt concrete, characterized in that: the carbon fiber in the conductive asphalt concrete is 7-11 mm short pitch-based carbon fiber, the mixing amount is 0.2-0.5%, the graphite is flake graphite with the radius of 2-5 mm, and the mixing amount is 15-25%.
6. The use method of the paver according to claim 4 for improving the self-repairing effect of the conductive asphalt concrete, characterized in that: part of the aggregate in the conductive asphalt concrete is replaced by steel slag, the steel slag accounts for 40-50% of the weight of the aggregate, and the iron content in the steel slag is 2-3%.
7. The use method of the paver according to claim 4 for improving the self-repairing effect of the conductive asphalt concrete, characterized in that: in the step S4, the working temperature of the model of the neodymium iron boron magnet is 180-200 ℃, the magnetic field intensity of the neodymium iron boron magnet is 1.3-1.4 Tesla, and the magnetic field intensity of the electromagnet is more than 1.3 Tesla.
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| CN202111215448.1A CN113774762B (en) | 2021-10-19 | 2021-10-19 | Paver for improving self-repairing effect of conductive asphalt concrete and using method |
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| CN202111215448.1A CN113774762B (en) | 2021-10-19 | 2021-10-19 | Paver for improving self-repairing effect of conductive asphalt concrete and using method |
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