CN119266073A - A portable asphalt pavement crack repair and reinforcement device and repair method thereof - Google Patents
A portable asphalt pavement crack repair and reinforcement device and repair method thereof Download PDFInfo
- Publication number
- CN119266073A CN119266073A CN202411450186.0A CN202411450186A CN119266073A CN 119266073 A CN119266073 A CN 119266073A CN 202411450186 A CN202411450186 A CN 202411450186A CN 119266073 A CN119266073 A CN 119266073A
- Authority
- CN
- China
- Prior art keywords
- air
- air suction
- air injection
- spraying
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/096—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for forming, opening-out, cleaning, drying or heating and filling
-
- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
本发明涉及沥青路面裂缝修补加固装置技术领域，尤其涉及一种便携式沥青路面裂缝修补加固装置，其包括料仓、隔离工作仓、吸气组件、喷气组件和喷料组件；料仓的底部设有隔离工作仓，隔离工作仓内设有空气过滤室，空气过滤室的两端分别与吸气组件和喷气组件连通，料仓的出料口通过回流料泵与喷料组件连接，回流料泵设于隔离工作仓内，所述料仓上设有注料口；本发明还提供一种修补方法，该装置中喷气组件喷出洁净气体、吸气组件吸入吹离的污浊灰尘气体，形成循环，完成灰尘清理时避免了灰尘乱飞，保护操作员身体健康；清理沥青裂缝灰尘后喷料组件注入灌缝溶液而填补沥青裂缝，两者同步进行互不干涉，简化修补步骤，有效提高了沥青裂缝修补效率。
The present invention relates to the technical field of asphalt pavement crack repair and reinforcement devices, and in particular to a portable asphalt pavement crack repair and reinforcement device, which comprises a silo, an isolated working bin, an air suction component, an air jet component and a spray component; an isolated working bin is provided at the bottom of the silo, an air filter chamber is provided in the isolated working bin, two ends of the air filter chamber are respectively connected with the air suction component and the air jet component, a material outlet of the silo is connected with the spray component through a reflux pump, the reflux pump is provided in the isolated working bin, and a material injection port is provided on the silo; the present invention also provides a repair method, in which the air jet component sprays clean gas and the air suction component sucks in dirty dust gas blown away to form a cycle, so that dust flying around is avoided when dust cleaning is completed, and the health of the operator is protected; after cleaning the dust from the asphalt cracks, the spray component injects a filling solution to fill the asphalt cracks, and the two are performed simultaneously without interfering with each other, simplifying the repair steps and effectively improving the efficiency of asphalt crack repair.
Description
Technical Field
The invention relates to the technical field of asphalt pavement crack repairing and reinforcing devices, in particular to a portable asphalt pavement crack repairing and reinforcing device and a repairing method thereof.
Background
In the service life of asphalt concrete pavement design, under the conditions of repeated rolling of cyclic load times, temperature change, shrinkage of base layer and other factors, the asphalt layer on the surface inevitably generates larger or smaller cracks, including transverse cracks, longitudinal cracks and netlike cracks. Asphalt cracks are classified into asphalt surface shrinkage cracks and base reflection cracks according to the cause of the two types of the load-bearing cracks and the non-load-bearing cracks. The load-type crack is developed from bottom to top due to the fact that tensile stress exceeds material fatigue strength, the shrinkage crack of the asphalt surface layer is caused by the fact that stress generated by shrinkage of asphalt materials in winter is larger than material strength, and the base layer reflection crack is caused by the fact that the shrinkage crack of the base layer extends to the asphalt surface layer, wherein the load-type crack comprises a white-to-black composite asphalt pavement structure formed by paving an asphalt surface layer on an old cement concrete pavement slab, and stress concentration is easy to occur at the joints and cracks of cement concrete, so that reflection cracks are easy to occur on the asphalt surface layer.
In the prior art, a grouting method is usually adopted to repair asphalt pavement crack diseases, firstly dust impurities in cracks are blown out cleanly by a dust removal cleaning machine, then crack pouring solutions such as asphalt waterproof paint, polyurethane waterproof paint, organic silicone cold crack pouring glue, polyurethane high-strength resin pouring glue, hot asphalt pouring glue or emulsified asphalt solution are injected at asphalt cracks, embedded into the cracks and solidified and formed, thus achieving the purpose of repairing asphalt pavement cracks, most of traditional asphalt crack repairing equipment is in a tank body, the crack pouring repair solution in the tank body is injected into the cracks by a tank body drainage equipment process, because the tank body is heavy, the construction operation is inconvenient to move, and is usually placed on a trolley or a tricycle, this just needs the operator to remove the shallow, aim at pitch crack with the spray tube equipment that stretches out from the jar body simultaneously, the process flow is not nimble enough, the technology is complicated, troublesome operation, crack pouring quality is difficult to guarantee, the construction working face is big, work efficiency is low, and before crack pouring repair solution crack pouring, need clear up the department dirt through dust removal descaling machine to the dust impurity in the pitch crack, avoid the dust to form the isolation layer between crack top layer and crack pouring repair solution, influence bonding strength and stability, the process operation step is loaded down with trivial details, bring a great deal of inconvenience for the operator, moreover the dust that the dust removal descaling machine blown out diffuses in the air, not only pollute the environment, moreover the operator gets into the health through breathing easily, bring health hidden danger for the health. Patent document 202410791791.8 discloses a rapid repairing device and a repairing method for asphalt pavement cracks, and discloses a technical scheme that the charging barrel is arranged on a cart, the charging barrel is heavy, construction operation is inconvenient to move, and dust in the surface layer of the cracks cannot be treated.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a portable asphalt pavement crack repairing and reinforcing device and a repairing method thereof.
In order to achieve the purpose, the portable asphalt pavement crack repairing and reinforcing device comprises a storage bin, an isolation working bin, an air suction assembly, an air injection assembly and a spraying assembly, wherein the isolation working bin is arranged at the bottom of the storage bin, an air filtering chamber is arranged in the isolation working bin, two ends of the air filtering chamber are respectively communicated with the air suction assembly and the air injection assembly, a discharge hole of the storage bin is connected with the spraying assembly through a backflow material pump, the backflow material pump is arranged in the isolation working bin, and a material injection hole is formed in the storage bin. The air is sprayed out through the air spraying component, dust impurities in asphalt cracks are blown off, the blown-off dust impurities are sucked into the air filtering chamber through the air sucking component and through the filtering effect, and clean air after filtering is sprayed out through the air spraying component, so that the air spraying component sprays clean air, the air sucking component sucks the blown-off dirty dust gas to form circulating air, dust is prevented from flying in the air at random when dust cleaning is completed, the situation that workers suck dust to harm health and cause discomfort is avoided, the dust in asphalt cracks is cleaned in the front, the rear spraying component injects into a crack filling solution to fill the asphalt cracks, the dust and the air sucking component are synchronously arranged at intervals, the steps of repairing asphalt cracks are simplified, the process is simple, the operation is more flexible, the movement is convenient, and the asphalt crack repairing efficiency is effectively improved.
In an optional embodiment, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the air suction assembly comprises an air suction inner pipe, an air suction hose and an air suction rod, one end of the air suction inner pipe is communicated with one end of the air filtering chamber through an air suction check valve, the other end of the air suction inner pipe extends to the outside of the isolation working bin and is connected with the air suction hose, and the air suction hose is connected with the air suction rod. The air flow is prevented from flowing backwards by arranging the air suction check valve, and the air pipeline is damaged.
In an optional embodiment, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the tail end of the air suction rod is provided with an air suction cover head, a retaining ring is detachably arranged on the side wall of the air suction rod above the air suction cover head, and two guide wheels are symmetrically arranged on the retaining ring. The gap between the wheels can be adjusted according to the width of the crack and the road condition, the stainless steel rod of the pipeline is supported and guided, the weight of the handle of the pipeline rod held by the right hand of an operator is reduced, and the crack is repaired more easily and conveniently.
In an optional embodiment, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the air injection assembly comprises an air injection inner pipe, an air injection hose and an air injection core rod, one end of the air injection inner pipe is communicated with the other end of the air filtering chamber through an air injection check valve, the other end of the air injection inner pipe extends out of the isolation working bin and is connected with the air injection hose, the air injection hose is connected with the air injection core rod, the air injection core rod is embedded into the air suction rod, the tail end of the air injection core rod is detachably provided with an air injection nozzle, and the air injection nozzle is contracted in the air suction cover head. The air flow is prevented from flowing backwards by arranging the air injection check valve, and the air pipeline is damaged. The tail end of the jet core rod is detachably provided with the jet nozzle, the jet nozzle can adjust the jet range of air flow, for example, the fan-shaped jet nozzle can adjust and control the jet range of air flow ejected by the jet core rod, the jet nozzle is suitable for cleaning asphalt crack dust with different widths, the jet nozzle ejects the air flow range more narrowly, the air flow impact force is larger, the effect of adjusting the jet strength can be achieved, dust and impurities in the asphalt crack can be effectively removed, the jet nozzle is contracted in the suction hood, the jet nozzle is prevented from being worn by the jet nozzle due to direct contact with an asphalt surface layer, and the service life and maintenance of the jet nozzle are improved.
In the portable asphalt pavement crack repairing and reinforcing device, a fan and a filter residue collecting drawer are arranged in an air filtering chamber, the fan is arranged close to one end of an air injection check valve, the filter residue collecting drawer is arranged close to one end of an air suction check valve in a drawable manner, a pulling ring is arranged on the filter residue collecting drawer, a macroporous air filter screen, a mesoporous air filter screen and a microporous air filter screen are sequentially arranged in an inner cavity of the filter residue collecting drawer along a direction away from the air suction check valve, and the macroporous air filter screen, the mesoporous air filter screen and the microporous air filter screen are detachably arranged. The filter residue is collected the drawer right side and is closely laminated with the inner tube of breathing in through the check valve that breathes in, and the filter residue is collected drawer left side wall and is close to the fan, and the filter residue is collected drawer and is had been embedded in proper order macroporous air filter screen, mesopore air filter screen, micropore air filter screen on the inner chamber right side to left side lateral wall, and big particle diameter dust, well particle diameter dust and the particle diameter dust in the filtration gas in proper order, and the filter residue is collected the drawer and can be followed the air filter chamber and be drawn out, conveniently is collected the filter residue and is changed and wash the filter screen.
In an optional embodiment, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the spraying component comprises a spraying hose and a spraying rod, one end of the spraying hose is connected with the reflux material pump, the other end of the spraying hose is connected with the spraying rod, a material spray nozzle is arranged at the tail end of the spraying rod, and a trowelling baffle is arranged on the spraying rod close to the material spray nozzle. Through set up the trowelling baffle on the lateral wall of the spray bar that is close to the material shower nozzle, along with the removal of spray bar, crack filling solution pours into in the asphalt crack gradually, and the crack filling solution of detention crack way table is trowelled by the trowelling baffle, forms bump harm driving safety, comfort level and roughness after avoiding the crack filling solution solidification shaping that the way table detained, reduces traffic safety hidden danger, and automatic trowelling need not the manual work and uses the scraper blade operation, uses manpower sparingly, improves work efficiency.
In an optional embodiment, in the portable repairing and reinforcing device for the asphalt pavement crack provided by the invention, the spraying rod is provided with a speed regulating handle power switch electrically connected with the reflux pump. The power switch of the speed regulating handle is used for controlling the reflux pump so as to control the discharging speed of the pouring solution from the inside of the bin.
In the portable asphalt pavement crack repairing and reinforcing device provided by the invention, an electric control chamber and a discharging chamber are further arranged in the isolation working bin, the electric control chamber and the discharging chamber are arranged on two sides of the air filtering chamber, and the reflux pump is arranged in the discharging chamber.
In the portable asphalt pavement crack repairing and reinforcing device provided by the invention, a power supply is arranged in the electric control chamber, an electric control panel is arranged on the side wall of the electric control chamber, a fan power switch and a fan speed regulating switch are arranged in the electric control panel, and a power supply waterproof socket is further arranged on the electric control panel and connected with the power supply. Through charging the electric control indoor power supply, the electric connection between the fan and the reflux pump is realized, and the working efficiency is improved. Through setting up fan switch, fan wind speed is controlled by fan speed governing switch, is equipped with the passageway or the line hole that supply circuit electric wire laid in the isolation working bin, and the circuit adhesion that is automatically controlled with button switch extends to the automatically controlled indoor of isolation working bin on the pipeline, avoids the power supply line to distribute scattered.
In an optional embodiment, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the portable asphalt pavement crack repairing and reinforcing device further comprises a buckle, and the buckle is used for binding and connecting the air suction assembly, the air injection assembly and the material injection assembly. Through setting up the buckle so that inhale subassembly, jet assembly and spout the material subassembly and bind together, make things convenient for the operator to hold the handle work.
Further, the invention also provides a repairing method based on the portable asphalt pavement crack repairing and reinforcing device, which comprises the following steps:
s1, aligning an air injection assembly with an asphalt crack, enabling dirty gas to enter an air filtering chamber through an air suction assembly, filtering the dirty gas, spraying the dirty gas through the air injection assembly, blowing away dust in the asphalt crack, and sucking the blown dust gas by the air suction assembly to form circulating air flow to clean the asphalt crack;
And S2, starting a reflux material pump, and conveying and injecting the crack filling solution into the asphalt crack from the lowest position of the bottom wall of the storage bin along the material spraying assembly by the reflux material pump so as to start to repair the asphalt crack.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. According to the portable asphalt pavement crack repairing and reinforcing device, the storage bin, the isolation working bin, the air suction component, the air injection component and the spraying component are arranged, the isolation working bin is arranged at the bottom of the storage bin, the air filtering chamber is arranged in the isolation working bin, the two ends of the air filtering chamber are respectively communicated with the air suction component and the air injection component, the discharge port of the storage bin is connected with the spraying component through the reflux material pump, the reflux material pump is arranged in the isolation working bin, gas is sprayed out through the air injection component to blow away dust impurities in asphalt cracks, the blown-away dust impurities are sucked into the air filtering chamber through the air suction component and are sprayed out through the air injection component, and filtered clean gas is sprayed out through the air injection component.
2. An air filtering chamber is arranged in the isolation working bin, a fan is arranged in the air filtering chamber, one side of the air filtering chamber is communicated with an air injection inner pipe, an air injection hose and an air injection core rod through an air injection check valve, the other side of the air filtering chamber is communicated with an air suction inner pipe, an air suction hose and an air suction rod through an air suction check valve, the air injection core rod is embedded into the air suction rod, a filter residue collecting drawer is arranged in the air filtering chamber, a macroporous air filter screen, a mesoporous air filter screen and a microporous air filter screen are sequentially arranged on one side of an inner cavity of the filter residue collecting drawer far away from the air suction check valve, along with the opening of the fan, air is sprayed out from an air injection nozzle at the tail end of the air injection core rod, dust in an asphalt crack is blown away, the blown away dust is covered by an air suction cover head and sucked into the air suction rod, the air flows into the air filtering chamber through the air suction check valve along the air suction rod, the air suction hose and the air suction inner pipe, and the air passes through the macroporous air filtering net, the mesoporous air filtering net and the microporous air filtering net in sequence to filter out dust with large particle size, dust with medium particle size and dust with particle size, and clean air without impurities after filtering is sprayed out from the air spraying nozzle through the air spraying check valve along the air spraying inner pipe, the air spraying hose and the air spraying core rod, so that the air spraying nozzle sprays clean air and the blown dust gas is sucked into the air suction cover head to form circulating air flow, so that dust in the air is prevented from flying in disorder to pollute the environment when cleaning asphalt crack dust is completed, and discomfort and harm to health caused by dust suction by workers are avoided.
3. According to the invention, the trowelling baffle is fixed on the side wall of the spraying rod close to the material spraying nozzle, along with the movement of the spraying rod, the crack filling solution is gradually injected into the asphalt crack, and the crack filling solution retained on the road surface of the crack is trowelled by the trowelling baffle, so that the phenomenon that the traffic safety, the comfort and the flatness are damaged due to the formation of bumps after the crack filling solution retained on the road surface is solidified and molded is avoided, the traffic safety hidden danger is reduced, the automatic trowelling is realized, the manual operation by using a scraping plate is not needed, the labor is saved, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a structural view of a portable asphalt pavement crack repairing and reinforcing device provided by the invention;
FIG. 2 is a schematic view of the suction and spray bars of FIG. 1;
FIG. 3 is a cross-sectional view of the portable asphalt pavement crack repairing and reinforcing device provided by the invention;
FIG. 4 is a schematic view of section A-A of the present invention;
FIG. 5 is a schematic view of section B-B of the present invention;
FIG. 6 is an enlarged partial schematic view at C in FIG. 1;
FIG. 7 is a schematic cross-sectional view of FIG. 2;
FIG. 8 is a partially enlarged schematic view of FIG. 7 at D;
FIG. 9 is an enlarged partial schematic view at E in FIG. 7;
FIG. 10 is a schematic view of a filter residue collecting drawer according to the present invention;
FIG. 11 is a schematic diagram of a blower of the present invention;
fig. 12 is a schematic view of an electronic control panel of the present invention.
[ Reference numerals description ]
1. A storage bin; 11, a material injection port, 12, a sealing cover, 13 and a handle;
2. Isolating the working bin;
21. air filter chamber 211, fan 212, filter residue collecting drawer 213, pull ring 214, macroporous air filter screen 215, mesoporous air filter screen 216, microporous air filter screen;
22. Electric control room 221, power supply 222, electric control panel 223, fan power switch 224, fan speed regulating switch 225, power supply waterproof socket;
23. 231, a reflux pump;
3. the device comprises an air suction assembly, an air suction inner pipe, 32, an air suction hose, 33, an air suction rod, 34, an air suction check valve, 35, an air suction cover head, 36 and a guide wheel;
4. The device comprises an air injection assembly, an air injection inner pipe, 42, an air injection hose, 43, an air injection core rod, 44, an air injection check valve, 45 and an air injection nozzle;
5. The device comprises a spraying component, a spraying hose, a spraying rod, a spraying nozzle, a trowelling baffle, a speed regulating handle power switch and a speed regulating handle power switch, wherein the spraying component comprises a spraying hose, a spraying rod, a spraying nozzle, a trowelling baffle and a speed regulating handle power switch;
6. And (5) a buckle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is to be noted that, all directional indicators in the embodiments of the invention such as first, second, up, down, left, right, front, back, and forth the following..once. Is used only to explain the relative positional relationship between the components, the movement conditions and the like in a certain specific posture as shown in the drawings, if the particular gesture changes, the directional indication changes accordingly.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
In the first embodiment, two groups of ventilation braces (not shown in the drawing) are symmetrically arranged on the back of the storage bin 1, hanging buckles matched with the braces are arranged on the side wall of the isolation working bin 2, shoulder pads are adopted, shoulders can be carried for a long time without fatigue, so that the storage bin 1 can walk through the braces of an operator, and the equipment movement is more flexible and convenient. The bin 1 is used for storing joint filling solutions, such as polyurethane joint filling glue, silicone joint filling glue, emulsified asphalt solution, modified emulsified asphalt solution and the like, and the bottom wall of the bin 1 is arranged in a downward inclined way towards the discharging cavity 23, so that the flow and the discharging of the joint filling solutions are facilitated. Wherein, the reflow pump 231 can use copper core high pressure reflow.
In the embodiment, the invention provides a portable asphalt pavement crack repairing and reinforcing device, which is shown in fig. 1-12, and comprises a storage bin 1, an isolation working bin 2, an air suction assembly 3, an air injection assembly 4 and a spraying assembly 5, wherein the isolation working bin 2 is arranged at the bottom of the storage bin 1, an air filter chamber 21 is arranged in the isolation working bin 2, two ends of the air filter chamber 21 are respectively communicated with the air suction assembly 3 and the air injection assembly 4, a discharge hole of the storage bin 1 is connected with the spraying assembly 5 through a backflow material pump 231, the backflow material pump 231 is arranged in the isolation working bin 2, a material injection hole 11 is formed in the storage bin 1, a sealing cover 12 is arranged at the material injection hole 11, a lifting handle 13 is further arranged on the storage bin 1, and the lifting handle 13 is convenient for equipment movement and operation. The air is sprayed out through the air spraying component 4 to blow off dust impurities in asphalt cracks, the blown-off dust impurities are sucked into the air filtering chamber 21 through the air sucking component 3 and through the filtering effect, and the filtered clean air is sprayed out through the air spraying component 4, so that the air spraying component 4 sprays out the clean air, the blown-off dirty dust gas is sucked into the air sucking component 3 to form circulating air, dust is prevented from flying in the air when dust cleaning is completed, the situation that dust is sucked into a worker to harm the health and cause discomfort is avoided, the dust in the asphalt cracks is cleaned at the front, the dust is injected into a crack filling solution by the rear spraying component 5, and the dust and the air sucking component are synchronously carried out at intervals and do not interfere with each other, so that the asphalt crack repairing step is simplified, the process is simple, the operation is more flexible, the movement is convenient, and the asphalt crack repairing efficiency is effectively improved.
As shown in fig. 1 to 4, in the portable repairing and reinforcing device for asphalt pavement cracks provided by the invention, the air suction assembly 3 comprises an air suction inner pipe 31, an air suction hose 32 and an air suction rod 33, one end of the air suction inner pipe 31 is communicated with one end of the air filter chamber 21 through an air suction check valve 34, the other end of the air suction inner pipe 31 extends out of the isolation working bin 2 and is connected with the air suction hose 32, and the air suction hose 32 is connected with the air suction rod 33. By providing the suction check valve 34, the flow is prevented from flowing backward, causing damage to the gas piping.
Further, an air suction cover head 35 is arranged at the tail end of the air suction rod 33, a retaining ring is detachably arranged on the side wall of the air suction rod 33 above the air suction cover head 35, and two guide wheels 36 are symmetrically arranged on the retaining ring. The gap between the wheels can be adjusted according to the width of the crack and the road condition, the stainless steel rod of the pipeline is supported and guided, the weight of the handle of the pipeline rod held by the right hand of an operator is reduced, and the crack is repaired more easily and conveniently.
In the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the air injection assembly 4 comprises an air injection inner pipe 41, an air injection hose 42 and an air injection core rod 43, one end of the air injection inner pipe 41 is communicated with the other end of the air filtering chamber 21 through an air injection check valve 44, the other end of the air injection inner pipe 41 extends out of the isolation working bin 2 and is connected with the air injection hose 42, the air injection hose 42 is connected with the air injection core rod 43, the air injection core rod 43 is embedded into the air suction rod 33, specifically, the air injection core rod 43 is embedded into the air suction rod 33 after passing through the air injection hose 42, a supporting rod (not shown in the drawing) is arranged on the inner wall of the air suction rod 33 and the outer wall of the air injection core rod 43 at intervals, so as to ensure that the air injection core rod 43 keeps stable and does not shake in the air suction rod 33, as shown in fig. 6, 8 and 9, the tail end of the air injection core rod 43 is detachably provided with an air injection nozzle 45, and the air injection nozzle 45 is contracted in the hood 35. The suction hood 35 can be made of transparent materials, so that the air injection range and the air injection intensity condition of the air injection nozzle 45 at the tail end of the air injection core rod 43 can be conveniently observed, and the air flow intensity is regulated and controlled by the fan speed regulating switch 224.
By providing a jet check valve 44, the air flow is prevented from flowing backward, causing damage to the air duct. The tail end of the air injection core rod 43 is detachably provided with the air injection nozzle 45, the air injection nozzle 45 can adjust the air injection range, for example, the fan-shaped air injection nozzle 45 can adjust and control the air flow width range of the air injection core rod 43, the air injection core rod is suitable for cleaning asphalt crack dust with different widths, the air injection nozzle 45 sprays air flow range is narrower, the air flow impact force is larger, the effect of adjusting the air injection strength can be achieved, dust and impurities in the asphalt crack can be effectively removed, the air injection nozzle 45 is contracted in the air suction cover head 35, nozzle abrasion caused by direct contact between the air injection nozzle 45 and an asphalt surface layer is avoided, and the service life and maintenance of the air injection nozzle 45 are improved.
In addition, as shown in fig. 3-5, a fan 211 and a filter residue collecting drawer 212 are disposed in the air filtering chamber 21, the fan 211 is disposed near one end of the air injection check valve 44, the filter residue collecting drawer 212 is disposed near one end of the air suction check valve 34 and is capable of being pulled, a pull ring 213 is disposed on the filter residue collecting drawer 212, a macroporous air filter screen 214, a mesoporous air filter screen 215 and a microporous air filter screen 216 are sequentially disposed in an inner cavity of the filter residue collecting drawer 212 along a direction far away from the air suction check valve 34, and the macroporous air filter screen 214, the mesoporous air filter screen 215 and the microporous air filter screen 216 are detachably disposed. The right side of the filter residue collecting drawer 212 is closely attached to the air suction inner pipe 31 through the air suction check valve 34, the left side wall of the filter residue collecting drawer 212 is close to the fan 211, the filter residue collecting drawer 212 is sequentially embedded with a macroporous air filter screen 214, a mesoporous air filter screen 215 and a microporous air filter screen 216 from the right side to the left side wall of the inner cavity, large-particle-diameter dust, medium-particle-diameter dust and particle-diameter dust in gas are sequentially filtered, and the filter residue collecting drawer 212 can be pulled out from the air filter chamber 21, so that filter residue can be conveniently collected and the filter screen can be conveniently replaced and cleaned. Specifically, a cross plate is fixed in the middle of the air filtering chamber 21, a rotating fan 211 is installed on the cross plate, the fan 211 is driven by a motor fixed on the cross plate, and blades of the fan 211 are obliquely arranged, so that a certain strength air flow is formed when the fan 211 rotates, and the air filtering chamber is shown in fig. 3, fig. 4 and fig. 11. The suction rod 33, the suction check valve 34, the blower 211, the air injection check valve 44, and the air injection core rod 43 form a circulating air flow, as shown with reference to fig. 5.
Further, in the portable repairing and reinforcing device for asphalt pavement cracks provided by the invention, the spraying component 5 comprises a spraying hose 51 and a spraying rod 52, one end of the spraying hose 51 is connected with the backflow pump 231, the other end of the spraying hose 51 is connected with the spraying rod 52, a material spray nozzle 53 is arranged at the tail end of the spraying rod 52, the material spray nozzle 53 at the tail end of the spraying rod 52 is arranged at a distance from the suction hood 35, the air spray nozzle 45 is arranged at the front side, the material spray nozzle 53 is arranged at the rear side, and a leveling baffle 54 is arranged on the spraying rod 52 close to the material spray nozzle 53, as shown in fig. 7. By arranging the trowelling baffle 54 on the side wall of the spray rod 52 close to the spray head 53, along with the movement of the spray rod 52, the crack filling solution is gradually injected into asphalt cracks, and the crack filling solution staying on the crack road surface is trowelled by the trowelling baffle 54, so that the problem that the crack filling solution staying on the road surface is formed into bumps after being solidified and molded to endanger driving safety, comfort level and flatness is avoided, the potential traffic safety hazard is reduced, automatic trowelling is realized, manual scraping plate operation is not needed, labor is saved, and the working efficiency is improved.
Further, as shown in fig. 1 and 2, in the portable repairing and reinforcing device for asphalt pavement cracks provided by the invention, the spray bar 52 is provided with a speed regulating handle power switch 55 electrically connected with the return pump 231. The speed of discharging the joint filling solution from the storage bin 1 is controlled by controlling the reflux pump 231 through the speed regulating handle power switch 55.
As shown in FIG. 3, in the portable repairing and reinforcing device for asphalt pavement cracks, an electric control chamber 22 and a discharging chamber 23 are further arranged in the isolation working bin 2, the electric control chamber 22 and the discharging chamber 23 are arranged on two sides of the air filtering chamber 21, and the reflux pump 231 is arranged in the discharging chamber 23.
Further, as shown in fig. 12, in the portable repairing and reinforcing device for asphalt pavement cracks provided by the invention, a power supply 221 is arranged in the electric control chamber 22, the power supply 221 can be a lead storage battery, an electric control panel 222 is arranged on the side wall of the electric control chamber 22, a fan power switch 223 and a fan speed regulating switch 224 are arranged in the electric control panel 222, a power supply waterproof socket 225 is further arranged on the electric control panel 222, and the power supply waterproof socket 225 is connected with the power supply 221. By charging the power supply 221 in the electric control room 22, the fan 211 and the reflux pump 231 are electrically connected, and the working efficiency is improved. By arranging the fan power switch 223, the wind speed of the fan 211 is controlled by the fan speed regulating switch 224, a channel or a wire hole for laying a power supply circuit wire is arranged in the isolation working bin 2, and a circuit electrically connected with the button switch is adhered on a pipeline and extends into the electric control chamber 22 of the isolation working bin 2, so that the power supply circuit is prevented from being scattered.
In addition, in the portable asphalt pavement crack repairing and reinforcing device provided by the invention, the portable asphalt pavement crack repairing and reinforcing device further comprises a buckle 6, and the portable asphalt pavement crack repairing and reinforcing device is used for binding and connecting the air suction component 3, the air injection component 4 and the spraying component 5. Through setting up buckle 6 in order to be in the same place in order to inhale subassembly 3, jet module 4 and spout material subassembly 5 binding, make things convenient for the operator to hold the handle work.
Furthermore, the invention also provides a repairing method based on the portable asphalt pavement crack repairing and reinforcing device, which comprises the following steps:
S1, aligning an air injection assembly (4) with asphalt cracks, enabling dirty gas to enter an air filtering chamber (21) through an air suction assembly (3), spraying out the dirty gas through the air injection assembly (4) after filtering, blowing off dust in the asphalt cracks, sucking the blown dust gas by the air suction assembly (2), and forming circulating air flow to clean the asphalt cracks;
And S2, starting a backflow material pump (231), and conveying and injecting the crack filling solution into the asphalt crack from the lowest part of the bottom wall of the storage bin (1) along the spraying assembly (5) by the backflow material pump (231), so that the asphalt crack is repaired.
Specifically, the repairing method of the portable asphalt pavement crack repairing and reinforcing device comprises the following steps:
When the air suction device is used, after filling a crack filling solution into a storage bin 1 through a device material filling port 11, an operator carries the bin 1 through an air-permeable brace, the right hand holds a stainless steel telescopic spray rod handle, an air injection spray nozzle 45 of an air injection core rod 43 is aligned to asphalt cracks, the left hand stirs an air suction rod 33 through an air suction power switch 223 of an air suction panel 222, dirty air is sucked into an air passage from an air suction cover head 35 at the tail end of the air suction rod 33, enters an air filter chamber 21 from an air suction inner pipe 31 through an air suction check valve 34 along an air suction hose 32, sequentially passes through a macroporous air filter screen 214, a mesoporous air filter screen 215 and a microporous air filter screen 216, then sequentially passes through the air injection check valve 44 from the left side of the air filter chamber 21 and enters the air injection inner pipe 41, clean air filtered dust is sprayed out from the air pipe along the air pipeline, dust in the asphalt cracks is blown off, the blown off dust in the asphalt cracks is covered by the air suction cover head 35, then sucked into the air suction rod 33, dust with different particle sizes is respectively blocked by air filter screens with different pore sizes and accumulated in a filter residue collecting drawer 212, the filter residue collecting drawer 212 can be taken out, and dust collecting dust is convenient to clean, and the dust is prevented from being blown out, and the clean from the air dust is blown off, and the air dust is polluted by the air and the air dust is prevented from the body.
The speed regulation handle switch 55 shift knob is kneaded to the right hand to open backward flow material pump 231, backward flow material pump 231 is carried along spout material hose 51, spout material pole 52 to material shower nozzle 53 from the bottom wall lowest of feed bin 1, then pour into in the pitch crack, thereby begin to repair the pitch crack, this moment, the operator holds the stainless steel pole handle with the right hand of feed bin 1, rely on leading wheel 36 to remove equipment pipeline along pitch crack direction, the dust impurity of pitch crack is cleared up to the front air shower nozzle 45 this moment, the pitch crack is repaired to the rear material shower nozzle 53, the automatic leveling reinforcement of leveling baffle 54, clear up pitch crack and repair reinforcement pitch crack go on simultaneously, and the two interval sets up, mutually noninterfere, form cyclic process, need not to set up additionally and remove dust the descaling machine, the process is simple, reduce manufacturing cost, alleviate operator working strength, repair technology after the repair is carried out with the repair earlier than traditional pitch crack, simplify the crack step, the operation is more nimble convenient, thereby improve pitch crack work efficiency.
It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and is for enabling those skilled in the art to understand the present invention and implement it accordingly, but the present invention is not limited to the above-described specific embodiments. All changes or modifications that come within the scope of the appended claims are intended to be embraced therein.
Claims (11)
1. The portable asphalt pavement crack repairing and reinforcing device is characterized by comprising a bin (1), an isolation working bin (2), an air suction component (3), an air injection component (4) and a spraying component (5), wherein the isolation working bin (2) is arranged at the bottom of the bin (1), an air filter chamber (21) is arranged in the isolation working bin (2), two ends of the air filter chamber (21) are respectively communicated with the air suction component (3) and the air injection component (4), a discharge hole of the bin (1) is connected with the spraying component (5) through a backflow material pump (231), the backflow material pump (231) is arranged in the isolation working bin (2), and a material injection hole (11) is formed in the bin (1).
2. Portable asphalt pavement crack repairing and reinforcing device according to claim 1, characterized in that the air suction assembly (3) comprises an air suction inner pipe (31), an air suction hose (32) and an air suction rod (33), one end of the air suction inner pipe (31) is communicated with one end of the air filter chamber (21) through an air suction check valve (34), the other end of the air suction inner pipe (31) extends to the outside of the isolation working bin (2) and is connected with the air suction hose (32), and the air suction hose (32) is connected with the air suction rod (33).
3. The portable asphalt pavement crack repairing and reinforcing device according to claim 2, wherein the tail end of the air suction rod (33) is provided with an air suction cover head (35), a retaining ring is detachably arranged on the side wall of the air suction rod (33) above the air suction cover head (35), and two guide wheels (36) are symmetrically arranged on the retaining ring.
4. A portable asphalt pavement crack repairing and reinforcing device according to claim 3, wherein the air injection assembly (4) comprises an air injection inner pipe (41), an air injection hose (42) and an air injection core rod (43), one end of the air injection inner pipe (41) is communicated with the other end of the air filtering chamber (21) through an air injection check valve (44), the other end of the air injection inner pipe (41) extends to the outside of the isolation working bin (2) to be connected with the air injection hose (42), the air injection hose (42) is connected with the air injection core rod (43), the air injection core rod (43) is embedded in the air suction rod (33), an air injection nozzle (45) is detachably arranged at the tail end of the air injection core rod (43), and the air injection nozzle (45) is contracted in the air suction cover head (35).
5. The portable asphalt pavement crack repairing and reinforcing device according to claim 4, wherein a fan (211) and a filter residue collecting drawer (212) are arranged in the air filtering chamber (21), the fan (211) is arranged close to one end of the air injection check valve (44), the filter residue collecting drawer (212) is arranged close to one end of the air suction check valve (34) in a drawable mode, a drawing ring (213) is arranged on the filter residue collecting drawer (212), and a large-hole air filter screen (214), a middle-hole air filter screen (215) and a micro-hole air filter screen (216) are sequentially arranged in an inner cavity of the filter residue collecting drawer (212) along a direction away from the air suction check valve (34), and the large-hole air filter screen (214), the middle-hole air filter screen (215) and the micro-hole air filter screen (216) are detachably arranged.
6. The portable asphalt pavement crack repairing and reinforcing device according to claim 1, wherein the spraying component (5) comprises a spraying hose (51) and a spraying rod (52), one end of the spraying hose (51) is connected with the backflow pump (231), the other end of the spraying hose (51) is connected with the spraying rod (52), a material spray nozzle (53) is arranged at the tail end of the spraying rod (52), and a leveling baffle (54) is arranged on the spraying rod (52) close to the material spray nozzle (53).
7. The portable asphalt pavement crack repairing and reinforcing device according to claim 6, wherein the material spraying rod (52) is provided with a speed regulating handle power switch (55) electrically connected with the backflow material pump (231).
8. The portable asphalt pavement crack repairing and reinforcing device according to claim 1, wherein an electric control chamber (22) and a discharging chamber (23) are further arranged in the isolation working bin (2), the electric control chamber (22) and the discharging chamber (23) are arranged on two sides of the air filtering chamber (21), and the reflux pump (231) is arranged in the discharging chamber (23).
9. The portable asphalt pavement crack repairing and reinforcing device according to claim 8, wherein a power supply (221) is arranged in the electric control chamber (22), an electric control panel (222) is arranged on the side wall of the electric control chamber (22), a fan power switch (223) and a fan speed regulating switch (224) are arranged in the electric control panel (222), a power supply waterproof socket (225) is further arranged on the electric control panel (222), and the power supply waterproof socket (225) is connected with the power supply (221).
10. The portable asphalt pavement crack repair and reinforcement device according to claim 1, further comprising a buckle (6) for binding the suction assembly (3), the air injection assembly (4) and the spray assembly (5).
11. A repair method based on the portable asphalt pavement crack repair reinforcing device as set forth in any one of claims 1 to 10, characterized by comprising the steps of:
S1, aligning an air injection assembly (4) with asphalt cracks, enabling dirty gas to enter an air filtering chamber (21) through an air suction assembly (3), spraying out the dirty gas through the air injection assembly (4) after filtering, blowing off dust in the asphalt cracks, sucking the blown dust gas by the air suction assembly (2), and forming circulating air flow to clean the asphalt cracks;
And S2, starting a backflow material pump (231), and conveying and injecting the crack filling solution into the asphalt crack from the lowest part of the bottom wall of the storage bin (1) along the spraying assembly (5) by the backflow material pump (231), so that the asphalt crack is repaired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411450186.0A CN119266073A (en) | 2024-10-17 | 2024-10-17 | A portable asphalt pavement crack repair and reinforcement device and repair method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411450186.0A CN119266073A (en) | 2024-10-17 | 2024-10-17 | A portable asphalt pavement crack repair and reinforcement device and repair method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119266073A true CN119266073A (en) | 2025-01-07 |
Family
ID=94105306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411450186.0A Pending CN119266073A (en) | 2024-10-17 | 2024-10-17 | A portable asphalt pavement crack repair and reinforcement device and repair method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119266073A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119800822A (en) * | 2025-03-17 | 2025-04-11 | 吉林省现代交通建设有限公司 | Town road pavement repair equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755364A (en) * | 2018-05-30 | 2018-11-06 | 中建路桥集团有限公司 | A kind of efficient pouring machine of highway crackle and its restorative procedure |
| CN208495210U (en) * | 2018-04-11 | 2019-02-15 | 广东电网有限责任公司 | A blowing dust cleaning tool with dust recovery function |
| CN210140759U (en) * | 2019-05-31 | 2020-03-13 | 黑龙江省公路勘察设计院 | Road and bridge crack reinforcing apparatus |
| CN111396335A (en) * | 2020-03-25 | 2020-07-10 | 上海煤气第二管线工程有限公司 | Gas drainage system for pipeline welding in tunnel |
| CN214992937U (en) * | 2021-01-29 | 2021-12-03 | 韶关市湕邦建筑工程有限公司 | A repair joint filling device for construction engineering |
| CN217174313U (en) * | 2021-12-25 | 2022-08-12 | 镇江锐驰建设工程有限公司 | Asphalt road crack repairing machine |
| CN117403520A (en) * | 2023-11-29 | 2024-01-16 | 绍兴境和景观绿化有限公司 | A road maintenance device for municipal engineering and its use method |
| CN221702059U (en) * | 2023-12-14 | 2024-09-13 | 邓少鸿 | Asphalt pavement crack maintenance device |
-
2024
- 2024-10-17 CN CN202411450186.0A patent/CN119266073A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208495210U (en) * | 2018-04-11 | 2019-02-15 | 广东电网有限责任公司 | A blowing dust cleaning tool with dust recovery function |
| CN108755364A (en) * | 2018-05-30 | 2018-11-06 | 中建路桥集团有限公司 | A kind of efficient pouring machine of highway crackle and its restorative procedure |
| CN210140759U (en) * | 2019-05-31 | 2020-03-13 | 黑龙江省公路勘察设计院 | Road and bridge crack reinforcing apparatus |
| CN111396335A (en) * | 2020-03-25 | 2020-07-10 | 上海煤气第二管线工程有限公司 | Gas drainage system for pipeline welding in tunnel |
| CN214992937U (en) * | 2021-01-29 | 2021-12-03 | 韶关市湕邦建筑工程有限公司 | A repair joint filling device for construction engineering |
| CN217174313U (en) * | 2021-12-25 | 2022-08-12 | 镇江锐驰建设工程有限公司 | Asphalt road crack repairing machine |
| CN117403520A (en) * | 2023-11-29 | 2024-01-16 | 绍兴境和景观绿化有限公司 | A road maintenance device for municipal engineering and its use method |
| CN221702059U (en) * | 2023-12-14 | 2024-09-13 | 邓少鸿 | Asphalt pavement crack maintenance device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119800822A (en) * | 2025-03-17 | 2025-04-11 | 吉林省现代交通建设有限公司 | Town road pavement repair equipment |
| CN119800822B (en) * | 2025-03-17 | 2025-06-24 | 吉林省现代交通建设有限公司 | Town road pavement repair equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105849336B (en) | Road Sweeper with Replacement Bags Installed | |
| CN102277846A (en) | Suction pipe dust suppression device and road sweeper for suction sweeping road sweeper | |
| CN119266073A (en) | A portable asphalt pavement crack repair and reinforcement device and repair method thereof | |
| KR100979475B1 (en) | Apparatus for repair of concrete road | |
| CN108867511A (en) | A kind of sweeping machine with dust-absorbing function | |
| CN209062744U (en) | Grinding device is used in a kind of processing of Hardware fitting | |
| CN206539366U (en) | A kind of Mine Dust isolates wall device | |
| CN205034086U (en) | Vehicle tyre washing unit | |
| CN208219376U (en) | A kind of energy saving and environment friendly construction of the highway concrete power saw | |
| CN109629504A (en) | Efficient track cleaner | |
| CN203475374U (en) | Road snow removal system and snow removal vehicle | |
| CN215128027U (en) | A hand-push industrial vacuum cleaner | |
| CN214836510U (en) | A raise dust processing apparatus for tunnel construction | |
| CN212103594U (en) | Highway engineering grinding device | |
| CN205019898U (en) | Dust remover | |
| CN212223734U (en) | Leaf suction machine | |
| CN213059351U (en) | Road bridge construction charging equipment | |
| CN107190684A (en) | A kind of self-propelled foam concrete fragment inhales sweeping device | |
| CN211142747U (en) | Dust-free type seam cleaning machine | |
| CN211973337U (en) | Cleaning vehicle for railway line | |
| CN212492094U (en) | Dust collector is used in building engineering construction | |
| CN210946425U (en) | Large-scale industrial milling machine for ground construction | |
| CN208543318U (en) | Belt grinder | |
| CN211340617U (en) | Ground waste rapid treatment equipment | |
| CN209760129U (en) | Device for melting ice and snow on road |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |