A road construction pavement crack repair device and method

Abstract

The present invention discloses a device and method for repairing pavement cracks in road construction, belonging to the field of municipal engineering. A device for repairing pavement cracks in road construction, characterized in that it comprises: a cover body, at least made of a hard material, covering the widened crack and bonded to the ground, and the cover body is provided with a normally closed material passing port; a material spraying assembly, connected to the lower end of the cover body, and after the repair device is installed, the material spraying assembly is located in the crack. The material spraying assembly includes a partition plate that is in a horizontal state during material spraying and is sealingly slidably connected to the inner wall of the crack. The partition plate divides the crack into two independent upper and lower chambers. The density of the partition plate is less than that of the filler. After the filling is completed, the partition plate is located above the filler, and the partition plate exerts pressure on the inner wall of the crack when sliding relative to the crack. It can achieve fast installation, the filler is compacted so that there are no voids in the crack, and the separation of the filler from the device results in a long repair life.

Description

Technical Field

[0001] The present invention belongs to the field of municipal engineering, and more specifically, relates to a device and method for repairing road surface cracks during road construction. Background Art

[0002] Road surfaces such as those made of cement and asphalt often crack due to external forces. After cracking, fillers are required to fill the cracks to ensure the smoothness of the road surface.

[0003] For general road surface cracks, the repair method is: slot widening - dust removal - filling - compaction.

[0004] During the slot widening step, the road surface crack is generally grooved into a T shape. That is, as described in a method for T-shaped slotting and grouting plugging of road surface cracks with the patent number CN201910033413.2, the T-shaped groove has a step surface compared with the V-shaped groove. The step surface is beneficial for bearing vertical pressure, improving the adhesion between the caulking material and the grooved wall surface. Under the vertical pressure of passing vehicle loads, the adhesion will be closer, and the plugging and anti-seepage effect will be better.

[0005] During the filling and compaction steps, the filler is generally introduced into the crack after slot widening, and at the same time, a certain pressure needs to be applied to the filler so that the filler can fill the entire crack to avoid the generation of voids. The existing road crack repair device after slot widening with the patent number CN201910204970.6 includes a portal plate, a telescopic mechanism, and a bottom plate. The portal plate is connected to the bottom plate through the telescopic mechanism. The telescopic movement of the telescopic mechanism can adjust the distance between the top plate of the portal plate and the bottom plate. Through holes are provided on the side plates on both sides of the portal plate. The cavity formed by the portal plate, the telescopic mechanism, and the bottom plate is pre-filled with the filler, and the through holes are closed. When in use, the device is placed in the crack, the through holes are opened, and the portal plate is pressed downward. The pressure in the cavity increases, and the filler is extruded from the through holes, making the adhesion between the filler and the crack more firm.

[0006] However, the above crack repair method has at least the following defects:

[0007] 1. When repairing cracks, since the device needs to be correctly embedded in the crack and the guard plate needs to be removed, it is necessary to temporarily block the lane where the crack is located to avoid interference from passing vehicles to construction workers and the repair device. Therefore, the repair speed of the above repair method is slow.

[0008] 2. After the filler fills the crack, the portal plate, the telescopic mechanism, and the bottom plate all remain in the crack and are mixed with the filler. When the filler solidifies, in winter, summer, or in areas with extreme weather, due to the different expansion coefficients of the filler, the portal plate, the telescopic mechanism, and the bottom plate, the device will be damaged, or the repair at the crack will break again, resulting in a short repair life. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a device and method for repairing pavement cracks in road construction, which can achieve fast installation, compaction of the filling material so that there are no voids in the cracks, and separation of the filling material from the device so that the repair life is long.

[0010] A device for repairing pavement cracks in road construction according to the present invention includes:

[0011] A cover body, at least made of a hard material, covering the widened crack and detachably connected to the ground. The cover body is provided with a normally closed material passing port.

[0012] A material spraying assembly, connected to the lower end of the cover body. After the repair device is installed, the material spraying assembly is located in the crack. The material spraying assembly includes a partition plate that is in a horizontal state during material spraying and is hermetically slidably connected to the inner wall of the crack. The partition plate divides the crack into two independent upper and lower chambers. The density of the partition plate is less than that of the filling material. After the filling is completed, the partition plate is located above the filling material, and the partition plate applies pressure to the inner wall of the crack when sliding relative to the crack.

[0013] A material bag, detachably connected to the upper side of the cover body. The material bag is composed of a flexible bladder and is filled with a fluid or semi-fluid filling material inside. The amount of the filling material can at least fill the crack. The discharge port of the material bag corresponds to the material passing port. When the external pressure received by the material bag exceeds a set threshold, the filling material in the material bag presses to open the material passing port.

[0014] As a further improvement of the present invention, the cover body is located on the ground, and the upper edge of the cover body is arc-shaped.

[0015] As a further improvement of the present invention, the upper edge of the cover body is flush with the ground, embedded in the crack, and seamlessly fits with the inner wall of the crack around.

[0016] As a further improvement of the present invention, a material passing port, a pipe accommodating cavity, and a plate accommodating cavity are sequentially communicated from top to bottom inside the cover body; the plate accommodating cavity is communicated with the crack; the material spraying assembly is installed in the pipe accommodating cavity; an air passage communicating the plate accommodating cavity and the outside is also opened inside the cover body.

[0017] As a further improvement of the present invention, a one-way valve is provided in the air passage. The one-way valve is normally closed, and the opening of the one-way valve has a pressure threshold.

[0018] As a further improvement of the present invention, the upper wall of the plate accommodating cavity is at least made of a magnetic material; at least the upper end of the partition plate is made of a magnetic material, and the magnetic property of the upper end of the partition plate is the same as that of the opposite surface of the upper wall of the plate accommodating cavity.

[0019] As a further improvement of the present invention, the spraying component includes a telescopic flexible tube made of flexible and / or elastic material, and a pair of partition plates made of rigid material; the upper end of the flexible tube is detachably connected to the lower side of the cover body and is indirectly communicated with the material package; the lower end of the flexible tube is an outlet, and the two tube walls of the flexible tube at the outlet are made of elastic material, and the tube walls have a tendency to fit together to form a duckbill-shaped one-way outlet; a sealing plate is fixedly connected to the lower end of the tube wall at the outlet of the flexible tube, and the sealing plate is made of rigid material. In the free state, the two sealing plates of the tube wall at the outlet of the flexible tube fit seamlessly; a rotating head is arranged outside the sealing plate; the rotating head is rotatably connected to the corresponding partition plate so that the partition plate has the ability to move closer to or away from each other. In the free state, the two partition plates are detachably connected by a detachable contact, and the rotation of the two partition plates and the rotating head is elastic, and the partition plates always have a tendency to rotate to a horizontal state; when the two partition plates are both in a horizontal state, they are in seamless contact with the inner wall of the crack; sealing gaskets made of elastic material are arranged on the outer edges of the four sides of the partition plates; when the outlet of the flexible tube is opened for the first time, the detachable contact is disconnected; when spraying materials, the internal pressure in the flexible tube exceeds the pressure threshold for opening the outlet of the flexible tube, the partition plates remain in a horizontal state, and the sealing gaskets are compressed and abutted against the inner wall of the crack.

[0020] As a further improvement of the present invention, when the partition plate is in a horizontal state, the diameter of the partition plate is the same as the diameter of the receiving plate cavity; the partition plate is always located below the air passage.

[0021] As a further improvement of the present invention, the cover body includes a plurality of cover bodies, and elastic membranes made of elastic material are fixedly connected between the plurality of cover bodies so that the cover body has the ability to be bent and placed.

[0022] A method for repairing road surface cracks in road construction according to the present invention, by using a road construction road surface crack repair device, includes the following steps:

[0023] Widen the crack to form a T-shaped groove;

[0024] Remove the dust and gravel in the T-shaped groove;

[0025] Place the repair device to cover the T-shaped groove, and the repair device is detachably connected to the ground;

[0026] Install the material package;

[0027] Compress the material package until the crack is filled with the filler.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] When the present invention sprays materials, the partition plate remains horizontal and is slidably connected to the inner wall of the crack in a sealed manner. After the material is sprayed out when the outlet of the flexible pipe is opened, the sealing plate moves outward, and the gasket at the outer edge of the partition plate is squeezed, and the filler is continuously sprayed out. The partition plate moves upward under the action of the jacking of the filler. When the partition plate rises, it maintains pressure with the inner wall of the crack, so the frictional force will increase. The retardation effect brought by the frictional force is used to compact the filler. The filler is compacted during spraying, improving work efficiency. At the same time, the filler is separated from devices such as the partition plate, and the problem of uneven composition in the filler will not occur.

[0030] The present invention also provides a one-way valve in the air passage. The opening of the one-way valve has a pressure threshold. Only after the partition plate rises and compresses the gas in the upper chamber of the crack to a certain internal pressure, the one-way valve opens for exhaust, so that on the basis of the frictional force, air pressure is also attached to compact the filler, improving the efficiency and strength of compaction.

[0031] The present invention also provides a permanent magnet in the cavity of the container plate. The permanent magnet repels the partition plate magnetically, so that on the basis of the frictional force, magnetic pressure is also attached to compact the filler, improving the efficiency and strength of compaction.

[0032] The upper edge of the cover body of the present invention is arc-shaped. The cover body is located above the road surface, facilitating the passage of passing vehicles. The extrusion force of the vehicle on the material package can be used to make it discharge materials. Therefore, the installation speed of this repair device is fast, without the need for manual extrusion, reducing the time of road closure and facilitating the traffic flow to pass as soon as possible. After the filler solidifies, the cover body can be removed. Since the spraying component and the filler are layered, it is very convenient to remove this repair device.

[0033] The cover body of the present invention is embedded in the road surface, closing the crack, eliminating the step of disassembling the repair device. Regarding the cover body as a road brick, there is no need to disassemble it after installation, which is very convenient to use, and still retains the function of using the passing traffic flow to press the material package to discharge materials.

[0034] The lower end surface of the partition plate of the present invention is coated with a layer of coating to prevent the adhesion of the filler. When the flexible pipe does not discharge materials, the outlet is closed, and the filler inside and outside the flexible pipe will not stick together, facilitating the disassembly of the repair device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic three-dimensional structure diagram of the repair device according to the first specific embodiment of the present invention;

[0036] Figure 2 is a schematic plan structure diagram of the cover body according to the first specific embodiment of the present invention;

[0037] Figure 3 is a schematic plan structure diagram of the spraying component according to the first specific embodiment of the present invention;

[0038] Figure 4Schematic plan view when the repair device according to the first specific embodiment of the present invention is installed in a crack;

[0039] Figure 5 Schematic plan view of the spraying component when the material packet in the first specific embodiment of the present invention starts to spray material under extrusion;

[0040] Figure 6 Schematic plan view of the spraying component when the partition plate at the flexible pipe outlet is turned over in the first specific embodiment of the present invention;

[0041] Figure 7 Schematic plan view of the spraying component during filling in the first specific embodiment of the present invention;

[0042] Figure 8 Schematic plan view of the spraying component after filling is completed in the first specific embodiment of the present invention;

[0043] Figure 9 Schematic plan view of the spraying component after filling is completed in the second specific embodiment of the present invention;

[0044] Figure 10 Schematic three - dimensional structure view of the repair device in the third specific embodiment of the present invention;

[0045] Figure 11 Schematic plan view when the repair device in the third specific embodiment of the present invention is installed in a crack;

[0046] Figure 12 Schematic three - dimensional structure view of the cover body in the fourth specific embodiment of the present invention.

[0047] Explanation of reference numerals in the figure:

[0048] Cover body 1, cover body 11, road patch 12, container plate cavity 13, container pipe cavity 14, material - passing port 15, air - vent passage 16, permanent magnet member 17, elastic film 18, spraying component 2, flexible pipe 21, sealing plate 22, rotating head 23, partition plate 24, sealing gasket 25, detachable contact 26, material packet 3. Detailed implementation manners

[0049] Specific embodiment one: Please refer to Figures 1-8 A road construction pavement crack repair device, including a cover body 1, a spraying component 2 and a material packet 3.

[0050] The cover body 1 includes a cover body 11 made of a hard material and a road patch 12;

[0051] The cover body 11 is made of a hard material. The upper edge of the cover body 11 is arc-shaped. The cover body 11 is located on the ground and covers the widened crack. Inside the cover body 1, there are a material passing port 15, a pipe containing cavity 14, and a plate containing cavity 13 that are connected in sequence from top to bottom. The diameters of the material passing port 15, the pipe containing cavity 14, and the plate containing cavity 13 increase in sequence from small to large. A thin film connected by a soldering in vain process is provided in the material passing port 15. When the thin film is under a certain pressure, the soldering in vain part is torn, and the material passing port 15 is opened. In the free state (i.e., without external force pressing), the material passing port 15 is normally closed. The spraying component 2 is installed in the pipe containing cavity 14. The plate containing cavity 13 is communicated with the crack, and the diameter of the plate containing cavity 13 is the same as and corresponds to the diameter of the upper end opening of the crack. An air passage 16 communicating the plate containing cavity 13 and the outside is also opened inside the cover body 11. In this embodiment, the air passage 16 communicates with the whole body on the side of the cover body 11, avoiding the problem that rainwater and the like directly pour into the crack, which affects the quality of the filler.

[0052] The road patch 12 is arranged on the whole body of the cover body 11, and the cover body 11 and the ground are bonded through the road patch 12. Specifically, in this embodiment, it is arranged at the lower end of the side of the cover body 11. Here, the road patch 12 adopts a kind of road repair black technology developed by a company named ABH Enterprises in the United States - the highway "band-aid", that is, American RoadPatch. It is composed of an asphalt-based polymer, a high-strength tensile tire base, and fiberglass composites, and can be directly bonded to the road surface. When in use, only the road patch 12 needs to be knocked and compacted, and the pressure of passing vehicles on it can also enhance the bonding strength between it and the ground. It should be noted that using the road patch 12 is just one implementation method, and the cover body 11 can also be fixed to the road surface using road bolts or the like.

[0053] The spraying component 2 includes a telescopic flexible pipe 21 made of a flexible and / or elastic material and a pair of partition plates 24 made of a hard material.

[0054] The upper end part of the flexible pipe 21 is located in the pipe containing cavity 14. The upper end of the flexible pipe 21 is detachably connected to the top wall of the pipe containing cavity 14. The upper end opening of the flexible pipe 21 is a feed port, and the feed port corresponds to the material passing port 15. When the material passing port 15 is opened, the feed port feeds. The lower end of the flexible pipe 21 is an outlet. The two pipe walls of the flexible pipe 21 at the outlet are made of an elastic material, and the pipe walls have a tendency to fit together to form a duckbill-shaped one-way outlet. The outlet of the flexible pipe 21 is similar to a duckbill valve and is closed under normal conditions. After the internal pressure is greater than the elastic force of the pipe walls at the outlet, the outlet opens. Therefore, only after a certain amount of filler is in the flexible pipe 21, the filler presses the pipe walls to turn outward to open the outlet.

[0055] At the lower end of the pipe wall at the outlet of the flexible pipe 21, a sealing plate 22 is fixedly connected correspondingly. The sealing plate 22 is made of a rigid material. In the free state (when the outlet of the flexible pipe 21 is not opened), the two sealing plates 22 on the pipe wall at the outlet of the flexible pipe 21 are seamlessly fitted; it should be noted that the two sealing plates 22 can be set such that the opposite surfaces are made of magnetic materials, so that there is a magnetic attraction force between the two sealing plates 22. When the outlet of the flexible pipe 21 is opened, the two sealing plates 22 move away from each other and have a horizontal displacement; this kind of magnetic attraction setting is just one implementation manner, and it can also be that only the elastic return force of the pipe wall at the outlet of the flexible pipe 21 is used to make the two sealing plates 22 abut and close; the setting of the sealing plate 22 is to provide a basis for arranging a partition plate 24 on the lower side of the flexible pipe 21.

[0056] A rotating head 23 is arranged on the outer side of the sealing plate 22; the rotating head 23 is rotatably connected to the corresponding partition plate 24 to enable the partition plate 24 to have the ability to move closer to or away from each other. The density of the partition plate 24 is less than the density of the packing; the rotation of the partition plate 24 is to flip upward or downward around a horizontal axis; in the free state, the two partition plates 24 are detachably connected by a detachable contact 26. The setting of the detachable contact 26 is a conventional means for those skilled in the art, such as two contacts with a certain magnetic force, etc., and will not be elaborated here; when the outlet of the flexible pipe 21 is opened for the first time, the detachable contact 26 is disconnected under pressure or tension; the rotation of the two partition plates 24 and the rotating head 23 is elastic, and the partition plate 24 always has a tendency to rotate to the horizontal state. In order to make the rotation elastic, a tension spring is usually arranged between the partition plate 24 and the sealing plate 22. This setting method is also a conventional means for those skilled in the art and will not be elaborated here; after the detachable contact 26 is disconnected, the two partition plates 24 both remain in the horizontal state and are seamlessly abutted against the inner wall of the crack; a sealing gasket 25 made of an elastic material is arranged on the outer peripheral edge of the partition plate 24; when the partition plate 24 is in the horizontal state, the diameter of the partition plate 24 is the same as the diameter of the receiving plate cavity 13; it should be noted that when the partition plate 24 is horizontal and the outlet of the flexible pipe 21 is closed, the partition plate 24 abuts against the inner wall of the crack, and the sealing gasket 25 just remains in the free state, or is slightly compressed under slight extrusion, but still retains the compressed space; when the partition plate 24 is horizontal and the outlet of the flexible pipe 21 is opened, since the sealing plate 22 moves outward, the sealing gasket 25 is driven to move outward and is oppressed by the inner wall of the crack, and the sealing gasket 25 is more strongly compressed at this time; in addition, the partition plate 24 is always located below the ventilation channel 16 to prevent blocking the exhaust of the ventilation channel 16.

[0057] The material packet 3 is detachably connected to the upper side of the cover body 11. The specific disassembly method of the material packet 3 and the cover body 11 belongs to the conventional means of those skilled in the art and will not be elaborated here. The material packet 3 is composed of a flexible bladder and is filled with a filler in a liquid or semi-liquid state. The amount of the filler is at least enough to fill the crack. The discharge port of the material packet 3 corresponds to the material passing port 15. After the external pressure received by the material packet 3 exceeds the set threshold, the filler in the material packet 3 presses the material passing port 15 to open. The external pressure mentioned here can be the pressure caused by the construction workers or the pressure caused by the wheels of passing vehicles. After the material packet 3 is pressured, it conveys the filler to the material passing port 15. When the pressure of the filler on the material passing port 15 breaks through the connection strength of the virtual soldering, the material passing port 15 opens, and the material packet 3 conveys the filler to the flexible pipe 21.

[0058] Working principle:

[0059] Install the cover body 11 on the crack after the crack has been widened. Paste the road patch 12 on the road surface and compact it with tools. The cover body 11 is installed tightly to block the crack completely. The part of the cover body 11 extending beyond the crack opening is flush with the ground. Install the material package 3 on the cover body 11. The material package 3 contains a fluid or semi-fluid filler. At this time, the construction workers can leave the site. The filler can be released by the pressure of passing vehicles on the material package 3, or the construction workers can manually press the material package 3 to discharge the material. When the material package 3 discharges the material, the flexible tube 21 is filled with the filler. When the filler reaches a certain amount, the outlet of the flexible tube 21 is opened, the sealing plate 22 moves outward, the detachable contact 26 separates, and the partition plate 24 flips upward until it remains in a horizontal state. The sealing gasket 25 abuts against the inner wall of the crack and divides the crack into upper and lower chambers. The lower chamber is continuously filled with the seasoning. Since the partition plate 24 closes the lower chamber at this time, as the liquid level of the filler in the lower chamber gradually rises until it pushes the partition plate 24 upward. It should be noted that when the filler is discharged from the flexible tube 21, the flexible tube 21 is not completely filled with the filler to ensure that the flexible tube 21 has space for upward compression. Since the sealing plate 22 must move outward every time the filler increases, the sealing gasket 25 must be squeezed, resulting in a stronger frictional force when the partition plate 24 moves upward, hindering the rise of the filler liquid level, thereby realizing the compaction of the filler. It should be noted that the pressing force on the material package 3 is greater than the frictional force between the partition plate 24 and the inner wall of the crack to ensure that the filler can push the partition plate 24 upward. And in the road surface, since the roadbed is generally composed of cement or asphalt, the lower chamber is not completely sealed, and gas will still seep out. Therefore, filling the lower chamber with the filler will not cause the problem that the air pressure in the lower chamber is greater than the pressure on the material package 3, resulting in difficulty in filling the filler. Even if the gas escape speed in the lower chamber is slow, since the material package 3 can be pressed by vehicles, the pressure on the material package 3 is obviously greater than the air pressure in the lower chamber objectively. Further, even if the air pressure in the lower chamber is large, due to the frictional force of the partition plate 24 on the inner wall of the crack, the compaction of the filler can still be ensured. Therefore, the effect of compacting the filler can be surely achieved. And due to the existence of the air vent 16, the gas in the upper chamber can escape, so the upward movement of the partition plate 24 can also be achieved. When the filler gradually increases until the crack is filled with the filler, the partition plate 24, the sealing plate 22, and the rotating head 23 are all located in the receiving plate cavity 13, and the flexible tube 21 is compressed and located in the receiving tube cavity 14. At this time, the flexible tube 21 can be filled with the filler or there can still be voids. When the filler hardens, the cover body 1 can be selected to be disassembled. Since the outlet of the flexible tube 21 is closed when it does not discharge the material, the filler in the flexible tube 21 is separated from the filler in the original crack, and there will be no situation where the filler is connected and the cover body 1 cannot be disassembled.

[0060] The road construction pavement crack repair method corresponding to the repair device of this embodiment includes the following steps:

[0061] S1. Widen the crack to form a T-shaped groove;

[0062] S2. Remove the dust and gravel in the T-shaped groove;

[0063] S3. Place the repair device to cover the T-shaped groove, and the repair device is detachably connected to the ground;

[0064] S4. Install the material pack;

[0065] S5. Compress the material pack until the crack is filled with the filler;

[0066] S6. Optionally remove the cover 1 after the filler hardens.

[0067] Specific Embodiment 2: On the basis of Specific Embodiment 1, please refer to Figure 9 , a permanent magnet 17 is embedded in the upper wall of the capacitor plate cavity 13, and the permanent magnet 17 is made of a magnetic material; the upper end face part of the partition plate 24 is made of a magnetic material, and the upper end of the partition plate 24 has the same magnetism as the opposite face of the upper wall of the capacitor plate cavity 13; in addition to the frictional force hindering the upward movement of the partition plate 24, a magnetic force is added to hinder the upward movement of the partition plate 24, thereby further compressing the filler.

[0068] Specific Embodiment 3: Different from Specific Embodiment 1, please refer to Figures 10-11 , the upper edge of the cover 1 is flush with the ground and is embedded in the crack, and it fits seamlessly with the inner wall of the crack all around; in this case, the crack is expanded into an inverted pyramid-shaped structure with multiple horizontal stepped surfaces; after the cover body 11 is installed, its upper end face is flush with the ground, and the air vent 16 communicates with the external space outside the cover body 11; above the ground plane, only the material pack 3 and the road patch 12 exist; the road patch 12 is connected to the upper end of the outer periphery of the cover body 11; the advantage of such a setting is that the cover 1 can be optionally not removed, so that the cover 1 is integrated with the road, saving the operation step of removing the cover 1.

[0069] Specific Embodiment 4: On the basis of Specific Embodiment 3, please refer to Figure 12 , the cover 1 includes a plurality of cover bodies 11, and an elastic film 18 made of an elastic material is fixedly connected between the plurality of cover bodies 11, so that the cover 1 has the ability to be bent and placed; this form is similar to a movable toy snake for children; since the flexible pipe 21 itself has a certain bending ability, such a setting enables the cover 1 to be bent to a certain extent, ensuring that the repair device can still be used when the crack after expansion is not straight.

[0070] Specific Embodiment Five: On the basis of any one of Specific Embodiments One to Four, a check valve is provided in the air passage 16. The check valve is normally closed and has a pressure threshold for opening. When the packing in the lower chamber increases and pushes the partition plate 24 upward, the partition plate 24 is also pressed by the air pressure from the upper chamber. As the packing gradually increases, the air pressure in the upper chamber gradually increases until the check valve in the air passage 16 is opened for exhaust. Such a setting makes the compaction effect of the partition plate 24 on the packing more significant.

[0071] Specific Embodiment Six: On the basis of any one of Specific Embodiments One to Five, a separating layer coating is applied to the lower end surface of the partition plate 24 to prevent the adhesion of the packing. When the flexible pipe 21 is not discharging material, the discharge port is closed, and the packing inside and outside the flexible pipe 21 will not stick together, which is convenient for the disassembly of the repair device after the packing hardens.

[0072] Specific Embodiment Seven: On the basis of any one of Specific Embodiments One to Six, the partition plate 24 is provided with air holes penetrating the upper and lower sides to facilitate the discharge of gas in the lower chamber.

Claims

1. A road construction pavement crack repair device, characterized in that: Comprising: A cover body (1), at least made of a rigid material, covering the widened crack, detachably connected to the ground, and the cover body (1) is provided with a normally closed material passing port (15); inside the cover body (1), there is a material passing port (15), a material containing tube cavity (14), and a material containing plate cavity (13) that are sequentially connected from top to bottom; the material containing plate cavity (13) communicates with the crack; a material spraying assembly (2) is installed in the material containing tube cavity (14); inside the cover body (1), there is also a ventilation passage (16) that communicates the material containing plate cavity (13) with the outside. A material spraying assembly (2), connected to the lower end of the cover body (1), and after the repair device is installed, the material spraying assembly (2) is located inside the crack. The material spraying assembly (2) includes a partition plate (24) that is in a horizontal state during material spraying and is hermetically slidably connected to the inner wall of the crack. The partition plate (24) divides the crack into two independent upper and lower chambers. The density of the partition plate (24) is less than that of the filler. After the filling is completed, the partition plate (24) is located above the filler. When the partition plate (24) slides relative to the crack, it applies pressure to the inner wall of the crack. The material spraying assembly (2) includes a telescopic flexible tube (21) made of a flexible and / or elastic material and a pair of partition plates (24) made of a rigid material; the upper end of the flexible tube (21) is detachably connected to the lower side of the cover body (1) and is indirectly communicated with the material packet (3); the lower end of the flexible tube (21) is an outlet, and the two tube walls of the flexible tube (21) at the outlet are made of an elastic material, and the tube walls have a tendency to fit together to form a duckbill-shaped one-way outlet; a sealing plate (22) is fixedly connected to the lower end of the tube wall at the outlet of the flexible tube (21) correspondingly. The sealing plate (22) is made of a rigid material. In the free state, the two sealing plates (22) of the tube wall at the outlet of the flexible tube (21) are hermetically fitted; a rotating head (23) is arranged outside the sealing plate (22); the rotating head (23) is rotatably connected to the corresponding partition plate (24) so that the partition plate (24) has the ability to move closer to or away from each other. In the free state, the two partition plates (24) are detachably connected by a detachable contact point (26). The rotation of the two partition plates (24) and the rotating head (23) is elastic, and the partition plate (24) always has a tendency to rotate to a horizontal state; when the two partition plates (24) are both in a horizontal state, they are hermetically abutted against the inner wall of the crack; sealing gaskets (25) made of an elastic material are arranged on the outer edges around the partition plate (24); when the outlet of the flexible tube (21) is first opened, the detachable contact point (26) is disconnected; during material spraying, the internal pressure in the flexible tube (21) exceeds the pressure threshold for opening the outlet of the flexible tube (21), the partition plate (24) remains in a horizontal state, and the sealing gasket (25) is compressed and abuts against the inner wall of the crack. A material packet (3), detachably connected to the upper side of the cover body (1), the material packet (3) is composed of a flexible bladder and is filled with a filler in a liquid or semi-liquid state inside, and the amount of the filler is at least enough to fill the crack; the discharge port of the material packet (3) corresponds to the material passing port (15), and after the external pressure on the material packet (3) exceeds the set threshold, the filler inside the material packet (3) presses the material passing port (15) to open.

2. The road construction pavement crack repair device according to claim 1, characterized in that: The cover body (1) is located on the ground, and the upper edge of the cover body (1) is arc-shaped.

3. The road construction pavement crack repair device according to claim 1, characterized in that: The upper edge of the cover body (1) is flush with the ground, embedded in the crack, and seamlessly fits with the inner wall of the crack all around.

4. A road construction pavement crack repair device according to claim 1, characterized in that: A check valve is provided in the air vent (16). The check valve is normally closed and has a pressure threshold for opening.

5. A road construction pavement crack repair device according to claim 1, characterized in that: The upper wall of the plate - containing cavity (13) is at least made of a magnetic material; the upper end of the partition plate (24) is at least made of a magnetic material, and the magnetism of the upper end of the partition plate (24) is the same as that of the opposite surface of the upper wall of the plate - containing cavity (13).

6. The road construction pavement crack repair device according to claim 1, characterized in that: When the partition plate (24) is in a horizontal state, the diameter of the partition plate (24) is the same as that of the plate - containing cavity (13); the partition plate (24) is always located below the air vent (16).

7. A road construction pavement crack repair device according to claim 1, characterized in that: The cover body (1) includes a plurality of cover bodies (11), and an elastic - material - made elastic film (18) is fixedly connected between the plurality of cover bodies (11) so that the cover body (1) has the ability to be bent and placed.

8. A method for repairing pavement cracks in road construction, characterized in that: By using a road construction pavement crack repair device according to any one of claims 1 to 7, the following steps are included: Widening the crack to form a T - shaped groove; Removing the dust and gravel in the T - shaped groove; Placing the repair device to cover the T - shaped groove, and the repair device is detachably connected to the ground; Installing the material package; Compressing the material package until the crack is filled with the filler.

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