KR100586395B1 - A cement injector and method for mending a crack using it - Google Patents

Abstract

Disclosed is a cement injection apparatus suitable for injecting cement as a repair liquid and a concrete crack repair method using the same. The device has a housing 510 with an open top and an inner space formed therein, a drive motor 530 housed in the housing 510 for generating power, a pump housed in the housing and pumped by power of the drive motor, and a repair liquid is sucked in. The pump 600 is connected to the suction pipe 601 and the discharge pipe 602 for discharging the sucked repair solution, and a repair liquid container connected to the suction pipe so as to be detachably connected to the suction pipe, and connected to the discharge pipe to inject the repair solution into the crack. The injection hose 511 and the cover 520 is rotatably coupled to the housing to open and close the inner space. The open upper portion of the housing is coupled to the soundproof plate 504 to block the drive noise of the drive motor and the pump. Such a device improves the adhesive strength of the cracked concrete by enabling the injection of cement admixtures and greatly prevents noise pollution during operation. The repair method using this device has little risk of deteriorating the strength of the concrete structure by forming the perforated hole with minimum depth, and since the bottom position of the perforated hole maintains a small depth from the surface of the concrete structure, there is no construction error. It is possible to drill exactly on the crack line.

Crack Repair, Cement, Repair Fluid, Diaphragm, Pump

Description

Cement injector and method for mending a crack using it}

1 is a schematic view showing a conventional injection device,

Figure 2 is a perspective view of the cover state in a state capable of storing or transporting the present invention injection device,

Figure 3 is a perspective view of the working state of the injection device of the present invention,

4 is a perspective view of a state in which the sound insulation plate of the present invention is removed;

5 and 6 is a cross-sectional view of the operating state of the pump employed in the device of the present invention,

Figure 7 is an exploded perspective view showing a packer used in the repair method of the present invention,

8a and 8b is a cross-sectional view showing the main portion of the packer of FIG.

9A to 9G are schematic cross-sectional views for explaining the present invention crack repair method,

Figure 10a is an exploded perspective view showing a confirmation window employed in the present invention,

10b is a sectional view showing an installation state of the confirmation window;

11a and 11b is a plan view showing the installation state of the packer and the confirmation window on the surface of the structure,

12 is a block diagram showing the construction method of the present invention.

* Explanation of symbols for main parts of the drawings

10 ... packer

510 housing ... 501 castors

502 ... Wire 503 ... Refill Bottle

504 ... soundproof plate 511 ... injection hose

511c ... Nozzle 512 ... Power Cable

513 Switch cable 520 Cover

530 ... drive motor 600 ... pump

610 ... pump housing 650 ... diaphragm

664 ... discharge valve plate 674 ... suction valve plate

The present invention relates to a cement injection device and a concrete crack repair method using the same, and more particularly, to a cement injection device suitable for injecting cement as a repair liquid and a concrete crack repair method using the same.

In general, a concrete structure is likely to be cracked on the inside or outside of the structure due to various factors such as dry shrinkage, temperature change and leakage of concrete. In addition, if a lot of load is applied, such as the underground parking lot floor, or where the construction of the waterproofing layer and the finishing concrete layer is poor in the general floor slab, the finishing concrete layer is often lifted even if not exposed to the outside of the structure.

In the case of cracks caused by normal dry shrinkage of concrete, most of them have no effect on the structure, but the degree of dry shrinkage is too severe, and cracks caused by other factors have serious adverse effects on the structure.

Moisture and air are easily introduced into the cracks and excited parts generated in the above-described structures, and the moisture and air introduced therein promote the weathering of the concrete of the structure and cause corrosion of the reinforcing bars, which have a fatal effect on the life and safety of the structure. do.

In order to repair the cracks generated on the surface of the concrete structure, it is repaired by filling the cracks by injecting a repair liquid into the cracks. As the repair liquid, epoxy having excellent mechanical properties such as bending strength and hardness is used. .

An example of an injector for injecting such epoxy into crack cracks of concrete is disclosed in Korean Utility Model Registration No. 0223151, an example of which is shown in FIG. this is

A cylinder (2) is assembled at the tip of the main wall of the casing (1), and the cylinder (2) sucks the epoxy contained in the epoxy cylinder (18) in the retracting stroke and discharges the amount of epoxy sucked in the forward stroke. (3) is inserted.

In the casing 1, a drive gear 5, large and small relay gears 6 and 7, a crank gear 8 and a link 10 provided in the shaft end of the motor 4 are incorporated. Accordingly, the driving force of the motor 4 is transmitted to the crank gear 8 via the drive gear 5 and the large and medium relay gears 6 and 7 so that the piston 3 linearly reciprocates to pump epoxy to crack cracks. Allow epoxy to be injected.

However, the above injection device has the following problems.

First, the injection method according to the reciprocating movement of the piston (3) allows the injection even when the particles are trapped in the epoxy between the piston (3) and the cylinder (2), but the cement mixed with sand, etc. This will damage the piston, making injection impossible.

Second, since the motor 4 is exposed to the outside, it is disadvantageous for a pleasant working environment due to the driving noise. In particular, when working in an enclosed space such as an underground parking lot, the work efficiency is further reduced due to noise.

Third, the work is carried to the shoulder holding the injection device makes the worker easily feel fatigue, thereby reducing the work efficiency.

On the other hand, the Korean Utility Model Registration Application No. 95-5179 discloses an injector for injecting cement mortar, but since this allows the operator to inject by hand by the piston method, the injection pressure is different depending on the ability of the operator In addition, due to the weak injection force, there is a limit to injection deeply and into a wide range of cracks.

The present invention has been made to solve the problems described above, and an object of the present invention is to provide a cement injection apparatus that enables the injection of cement admixture and greatly reduces the generation of noise, and a concrete crack repair method using the same.

Another object of the present invention is to provide a cement injecting device and a concrete crack repair method using the same to simplify the movement and storage and greatly reduce the worker fatigue.

Another object of the present invention is to provide an improved cement injector and concrete crack repair method using the same, which is also advantageous to the crack repair of difficult corners or irregularities.

It is another object of the present invention to provide a cement injection device and concrete crack repair method using the same to prevent the injection of cement by blocking the crack gap by the crushed concrete during hole drilling for inserting the packer.

It is still another object of the present invention to provide a cement injector and a concrete crack repair method using the same, by which the construction can be performed even when the depth of the hole for inserting the packer is made low to reduce the damage of the structure.

Still another object of the present invention is to provide a cement injection device and a concrete crack repairing method using the same, which make it possible to check whether a repair solution is injected into a crack.

The present invention for achieving the above object in the repair solution injection device for injecting a repair solution in the cracks of the building,

A housing having an upper opening and an internal space formed therein, a drive motor accommodated in the housing and generating power, a suction pipe which is accommodated in the housing and pumped by the power of the drive motor, and in which the maintenance liquid is sucked, and discharges the suction maintenance liquid. A pump connected to the discharge pipe, a repair liquid container detachably connected to the suction pipe to supply a repair liquid, an injection hose connected to the discharge pipe to inject the repair liquid into the crack gap, and rotatably coupled to the housing. A cover for opening and closing the space is provided.

The open upper portion of the housing is further provided with a soundproof plate to block the drive noise of the drive motor and the pump, the bottom of the housing is further provided with a caster to enable rolling movement.

The pump may include a pump housing having a suction port and a discharge port to which the suction pipe and the discharge pipe are connected, and a chamber formed adjacent to the suction port and the discharge port; A cylinder coupled within the pump housing; A piston slidably coupled to the cylinder; A diaphragm coupled to a lower end of the piston and changing a pressure in the chamber when the piston moves up and down; A pressure plate in contact with the upper end of the piston; A rocking plate that is rocked by the power of the drive motor to pressurize and release the pressure plate; A suction valve seat coupled to the suction port of the pump housing and having a suction hole communicating with the chamber at one side and a suction opening communicating with the suction port at the other side; A discharge valve seat coupled to the discharge port of the pump housing and having a discharge opening communicating with the chamber at one side thereof and having a discharge hole communicating with the discharge hole at the other side thereof; A suction valve plate embedded in the suction valve seat to open and close the suction opening in accordance with a pressure change in the chamber and to close the suction opening by a spring; And a discharge valve plate embedded in the discharge valve seat to open and close the discharge opening according to a pressure change in the chamber, and close to close the discharge opening by a spring.

As the repair solution, cement admixtures containing sand are used.

In another aspect, the present invention to achieve the above object in the concrete crack repair method for injecting the repair solution to the cracks using the repair solution injection device,

Forming a plurality of primary holes in a crack gap of the concrete structure at a constant diameter, a predetermined depth, and a predetermined interval; Forming a concrete core portion through which the crack gap passes in the bottom surface of the hole by forming a hole deeper by using a core drill equipped with a hollow core bit in each of the primary holes; Impacting the concrete core part to cut the concrete core part stuck in each hole; and cleaning the concrete ground powder or dust along each of the perforated holes and the crack gap; and the perforated hole Coupling a hollow rubber sleeve having a threaded portion to an inner circumferential surface thereof; Coupling a hollow packer body having a screw coupling portion screwed to a screw portion of the rubber sleeve and a nozzle portion connected to an injection hose of the injection device, to the rubber sleeve; Coupling a repair liquid filled with a repair liquid to the suction pipe; Connecting the nozzle part and the injection hose of the packer body and driving the driving motor to drive the pump; Injecting a repair liquid through the nozzle unit into the crack gap; Closing the nozzle part with a cap member after injecting the repair liquid; And cutting and closing the packer body and the rubber sleeve protruding from the surface of the concrete structure after the injected repair solution is cured.

In addition, after attaching the packer body to the rubber sleeve and attaching a confirmation window formed with a repair liquid receiving space communicating with the crack gap between the holes, along the crack gap between the confirmation window and the holes Sealing to prevent leakage of the repair liquid.

The sealing step is attached to the sealing tape along the crack gap, the repair solution uses a cement admixture mixed with sand.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The packer used to repair the crack gap of the concrete structure according to the present invention includes holes 101 formed in the crack gap 110 to inject a repair solution into the crack gap 110 of the building, as shown in FIG. 9B. ) Is combined. The crack gap 110 communicates with the bottom surface of the formed hole 101.

7, 8A and 8B, the packer 10 is coupled to the hole 101 and a hollow rubber sleeve 30 having a threaded portion 31 formed on an inner circumferential surface thereof, and the screwed portion ( 31 is a hollow packer body (15) having a screw coupling portion (11) which is screwed to the 31 and a nozzle portion (12) connected to the injection device of the present invention to be described later, and the repair liquid is injected into the nozzle portion 12 It is provided with a stopper member 20 to prevent the leakage of.

The threaded portion 31 of the rubber sleeve 30 is formed as a light-sensitive lower side (上 廣 下 狹), when the screwed portion 11 is coupled, as shown in Figure 8b and 9e, threaded portion 31 The lower portion of the c) is radially expanded to be in close contact with the hole 101 formed in the structure. Accordingly, the rubber sleeve 30 is prevented from being separated from the hole 101 when the repair liquid is injected at a constant pressure. In addition, a flange portion 32 is formed at the tip end of the rubber sleeve 30 so as to prevent excessive entry into the hole 101.

Wrench fastening portion 13 protrudes around the central portion of the packer body 15 to be screwed to the rubber sleeve 30 using a tool such as a wrench (not shown). The packer body 15 is formed of a plastic material.

The stopper member 20 includes a stopper 21 coupled to the nozzle unit 12, an annular connecting ring 22 loosely coupled to the screw coupling part 11, and the stopper 21. It consists of a flexible connecting strip 23 for connecting the connecting ring (22).

Such a packer 10 is coupled to the rubber sleeve 30 to the hole 101 formed in the concrete structure 100, as shown in Figure 9c, the screw coupling portion 11 of the packer body (15) To the rubber sleeve 30 by using a wrench (not shown). In this case, as shown in FIGS. 8B and 9D, the threaded portion 31 of the rubber sleeve 30 is formed as a light receiving narrow, and as the packer body 15 is coupled, the lower end portion extends radially to the inner circumferential surface of the hole 101. It will be in close contact.

As shown in FIG. 9D, after the packer 10 is coupled to the structure, the injection nozzle 511c is coupled to the nozzle unit 12 to inject the repair solution 200 into the crack gap 110. Against this injection pressure, the packer remains stable in the hole 101.

After the injection is completed, as shown in FIG. 9E, the stopper member 20 is coupled to the nozzle unit 12 to prevent leakage of the injected repair liquid.

On the other hand, the injection device for injecting the repair liquid into the crack gap through the packer 10 as described above has the following configuration.

2 to 4, this is a housing 510 having an open top and an inner space formed therein, a drive motor 530 accommodated in the housing 510 and generating power, and housed in the housing 510. And a pump 600 connected to a suction pipe 601 for pumping the power of the driving motor 530 and a discharge pipe 602 for discharging the repaired liquid, and a separation and coupling to the suction pipe 601. A maintenance liquid container 503 connected to supply a repair liquid, an injection hose 511 connected to the discharge pipe 602 to inject a repair liquid into the crack gap, and rotatably coupled to the housing to open and close the inner space. The cover 520 is provided.

An open upper portion of the housing 510 is coupled to a soundproof plate 504 that blocks driving noise of the driving motor 530 and the pump 600.

In addition, the lower surface of the housing 510 is provided with a caster 501 to enable the cloud movement to simplify the movement.

The injection hose 511 is provided with a nozzle 511c at an end thereof, a blocking plate 511b is provided to prevent contamination of the repair liquid to the surroundings when the repair liquid is injected, and a pressure gauge 511a for measuring the injection pressure of the repair liquid. ) Is provided.

In addition, the cover 520 can be fixed to the housing 510 at an angle by the wire 502 to prevent the cover 520 from being attracted to the bottom surface during the operation.

In addition, a switch 513a was prepared by installing a separate switch cable 513 so that power supply and shut-off of the driving motor 530 can be conveniently performed during the operation.

On the other hand, the injection device of the present invention makes it possible to inject a repair solution made of cement admixture mixed with sand. To this end, the pump 600 employed in the injection device of the present invention is configured as follows.

4 to 6, a suction inlet 672 and an outlet 662 are formed to connect the suction pipe 601 and the discharge pipe 602, and the chamber is adjacent to the suction port 672 and the discharge port 662. A pump housing 610 in which a 611 is formed; A cylinder 620 coupled to the pump housing 610; A piston 621 slidably coupled to the cylinder 620; A diaphragm 650 coupled to a lower end of the piston 621 and changing a pressure in the chamber 611 when the piston moves up and down; A pressure plate 630 in contact with an upper end of the piston 621; A rocking plate 640 oscillating with the power of the driving motor 530 to pressurize and release the pressure plate 630; Suction hole 671 is coupled to the inlet 672 of the pump housing 610 and the suction hole 671 is formed in communication with the chamber 611 on one side and the suction opening 675 is connected to the suction port 672 on the other side A valve seat 670; The discharge opening 665 is coupled to the discharge port 662 of the pump housing 610 and the discharge opening 665 is formed on one side and in communication with the chamber 611 and the discharge hole 661 is formed on the other side is in communication with the discharge port 662 A valve seat 660; A suction valve plate built into the suction valve seat 670 to close and close the suction opening 675 according to a pressure change in the chamber 611 and to close the suction opening 672 by a spring 673. 674); A discharge valve plate embedded in the discharge valve seat 660 to close and close the discharge opening 665 according to a pressure change in the chamber 611 and to close the discharge opening 665 by a spring 663. 664;

The repair liquid injection device of the present invention having the configuration as described above is operated and used as follows. First, as shown in FIG. 9D, the packer 10 is coupled to a crack gap, and the repair liquid is filled in the repair liquid container 503 and then coupled to the suction pipe 601.

Subsequently, when the driving motor 530 is driven through the power cable 512 and the switch 513a, the repair liquid flows in through the suction pipe 601 and is discharged through the discharge pipe 602 by the operation of the pump 600. The discharged repair liquid is injected into the crack through the nozzle 511c and the packer 10 of the injection hose 511.

At this time, noise caused by the driving of the driving motor 530 and the pump 600 is blocked by the soundproof plate 504, and enables the operation while moving the device by the caster 501.

On the other hand, when the rocking plate 640 oscillates by the power of the drive motor 530, the pressure plate 630 is interlocked to reciprocate the piston 621 in the cylinder 620.

While the piston 621 is reciprocated, a diaphragm 650 is elastically deformed in the chamber 611 to change the pressure in the chamber 611, as shown in FIGS. 5 and 6. That is, as shown in FIG. 5, when the diaphragm 650 is deformed to expand the space of the chamber 611, the spring 673 is contracted by the vacuum pressure and the suction opening 675 is opened to repair the chamber. (611) to flow into. At this time, the spring 663 is expanded by the suction force to close the discharge opening 665 by the discharge valve plate 664.

In addition, as shown in FIG. 6, when the diaphragm 650 is deformed to contract the space of the chamber 611, the spring 673 is expanded by the contracting pressure to close the suction opening 675, and the spring 663 is contracted by the contraction pressure to open the ejection opening 665 to eject the repair liquid in the chamber 611.

Thus, while the diaphragm 650 changes the pressure in the chamber 611, the suction valve plate 674 and the discharge valve plate 664 open and close the suction opening 675 and the discharge opening 665, respectively. 611 is sucked into and discharged.

The pump 600 for sucking and discharging the repairing liquid as described above is blocked by the diaphragm 650 so that the sliding movement space of the piston 621 is blocked from the chamber 611 into which the repairing liquid is introduced. It will not enter the space.

Therefore, the wear of the inner wall of the cylinder 620 due to the repair liquid is prevented and the driving of the pump is smooth.

In addition, since the repair solution does not flow into the cylinder 620 space, it is possible to use a cement admixture having coarse epoxy pod particles as the repair solution.

Therefore, it is possible to inject cement admixtures into the cracks of concrete, thereby improving the adhesive strength and improving the crack repairability.

On the other hand, the crack repair method of the concrete structure using the injection device as described above are as follows.

9 to 12, first check the installation position of the packer 10 by checking the crack width and length, the crack state, the crack position and the thickness of the structure.

Subsequently, as shown in FIG. 9A, the primary hole 101 is formed in the crack gap 110 of the concrete structure 100 at a diameter of about 10 mm, a depth of about 10 to 15 mm, and a 25 to 45 cm interval. A plurality of drills 120 are formed. At this time, the crack gap 110 in the hole 101 is blocked by the crushed concrete powder.

Subsequently, as shown in FIG. 9B, the secondary hole 101 having a depth of about 15 to 20 mm is deeper than the primary hole by using the hollow core bit 130 mounted on the power drill in the primary hole 101. To form. At this time, the formed concrete core portion 102 is formed in the hole 101 and the crack gap 110 passing through the core portion 102 is separated from the crushed concrete powder due to vibration during secondary drilling. Thus, the separated concrete powder is cleaned using a blower (not shown).

Alternatively, when the crack gap 110 in the hole 101 is closed due to the concrete crushed powder generated during the primary and secondary drilling of the hole 101, the injection of the repair solution 200 later is thereby performed. Since this is hindered, the concrete core portion 102 is cut by applying an impact. In this case, the crack gap 110 appearing in the cross section of the cut core portion 102 is not closed by concrete dust or the like.

In this state, the concrete ground powder or dust is cleaned along the crack gap 110 on the surface of each of the perforated holes 101 and the structure 100 using a blower or the like.

Thereafter, as shown in FIGS. 9C and 9D, the hollow rubber sleeves 30 having the threaded portions 31 formed on the inner circumferential surface of the periphery of the perforated holes 101 are formed. The screwer body 15 is screwed into the rubber sleeve 30. As shown in FIG. 7, the packer body 15 has a screw connection part 11 screwed to the threaded portion 31 of the rubber sleeve 30 and a nozzle connected to the nozzle 511c of the repair liquid injector. It has a portion 12.

When the packer body 15 is screwed to the rubber sleeve 30, as shown in FIG. 9D, the lower end portion of the rubber sleeve 30 is radially expanded so that the packer body 15 is tightly fixed to the inner circumferential surface of the hole 101.

After the packer 10 is coupled to each hole 101 in this manner, as shown in FIG. 9C and FIG. 10A, the confirmation windows 40 are attached at regular intervals along the crack gap 110.

As shown in FIGS. 10A and 10B, the confirmation window 40 includes a transparent boss 41 having a repair liquid receiving space 41a communicating with the crack gap 110 between the holes 101, and the boss. It consists of a flange 42 connected around 41, a double-sided adhesive 45 and a release paper 46 attached to the bottom of the flange 42.

The confirmation window 40 allows to confirm whether the repair solution 200 injected into the adjacent crack gap 110 is supplied when the cement admixture repair liquid 200 is injected into the crack gap 110. That is, when the repair liquid 200 is injected through the packer 10, the repair liquid 200 is supplied along the crack gap 110, and the repair liquid 200 enters the accommodation space 41a of the adjacent confirmation window 40. By checking this, the operator can check whether the repair liquid 200 is injected.

11A and 11B, after the packer 10 and the confirmation window 40 are installed, the crack gap 110 is sealed along the crack gap 110.

The sealing method may be sealed with the sealing tape 400 along the crack gap 110, as shown in Figure 11b. In this case, the sealing tape 400 is preferably attached to the upper surface of the flange 42 of the confirmation window 40, so as to increase the adhesive force with the adhesive tape 45 of the confirmation window 40. When the repair solution 200 is injected along the crack gap 110, it is possible to confirm whether the repair fluid is injected through the confirmation window 40, and the sealing tape 400 attached to the crack gap 110 on the surface of the structure is elastic. Since the sealing tape 400 is deformed by the pressure of the injected repair liquid 200, it is possible to check whether the injection.

In addition, the sealing method may be sealed with an epoxy resin along the crack gap, or may be additionally sealed by attaching a sealing tape 400 to the upper surface of the sealed epoxy resin.

In addition, after the crack crack 110 is coated with a liquid urethane primer (not shown) in a constant width (about 100 mm), it may be sealed with the epoxy resin or sealing tape 400. In this case, the primer cleans around the crack gap 110 to smoothly attach the epoxy resin or the sealing tape 400.

After attaching the sealing tape 400 in this way it is in close contact with the bottom surface using a pressure tool (not shown).

Thereafter, as shown in FIG. 9D, the nozzle 511c of the injection hose 511 is connected to the nozzle part 12, and the driving motor 530 and the pump 600 are operated to crack the cement admixture as a repair liquid. ) Into the At this time, the repair liquid 200 is supplied along the crack gap 110 communicated with each other by the injection pressure, and when the repair liquid 200 is supplied to the receiving space 41a of the confirmation window 40 attached to the structure 100 surface. Inject the repair solution 200 until.

After the injection is completed by coupling the nozzle 511c to one packer 10, the switch 513a is turned off, and after the nozzle 511c is coupled to the adjacent packer 10 again, the switch 513a is turned on. By injection. That is, the operation is performed by holding the switch 513a on one hand and the injection hose 511 on the other hand. In addition, the caster 501 performs the operation while simply moving the device.

The nozzles 511c are prevented by the blocking plate 511b when the nozzles 511c are coupled to and pulled around by the discharge pressure of the repairing liquid at the time of injection.

As described above, when the repair liquid 200 is injected and the repair liquid 200 is supplied to the receiving space 41a by observing the adjacent confirmation window 40, the nozzle part 12 of the injected packer assembly 10 is illustrated in FIG. 9E. Closing is closed by the closure member 20 as shown in the following, and then the repair solution 200 is injected through the adjacent packer assembly 10 as described above.

Meanwhile, in the process of supplying the repair liquid 200 through the packer 10 on one side, the repair liquid 200 may be injected through the adjacent packer 10 until the air in the crack gap 110 is exhausted. . In this case, air in the crack gap 110 is exhausted and filled with the repair liquid 200, thereby making it possible to maintain a more robust repair.

After a certain period of time, when the injected maintenance liquid 200 is cured, the screw coupling portion 11 of the packer 10 is cut as shown in FIG. 9F, and the sealing tape 400 is sealed as shown in FIG. 9G. And then, the flange portion of the packer body and rubber sleeve protruding on the surface of the concrete structure 100 is cut and ground using a cutter blade to finish.

Needless to say, the present invention as described above is not limited to the above embodiment and can be practiced with many modifications.

 First, it enables to inject the cement admixture to improve the adhesive strength of the cracked concrete.

Second, by housing the drive motor and the pump in the housing and sealed with a soundproof plate significantly prevents noise pollution during work.

Third, by adopting a caster to facilitate the movement of the device to improve the work efficiency.

Fourth, by storing components such as a drive motor and a pump in the housing and opening and closing with a cover, storage and transportation are convenient.

Fifth, by first drilling with a general drill and then second drilling with a core drill to form the hole 101, the work time is greatly shortened and the life of the core drill is extended.

Sixth, by using the core drill to form the concrete core portion and cutting it to prevent the crack cracking due to the concrete crushed dust, it is easy to inject the repair liquid to facilitate the operation.

Seventh, in the repair method of the present invention, there is almost no risk of lowering the strength of the concrete structure itself or damaging the embedded wire pipe by forming the perforated hole to the minimum depth, and the bottom position of the perforated hole 101 is concrete. It maintains a small depth from the surface of the structure, allowing precise drilling on crack lines without construction errors.

Eighth, conventionally, after the check valve is employed to inject the repair liquid from one side packer, the injected repair liquid cannot be flowed back to the outside. Contrary to this, the present invention enables robust maintenance by enabling the exhaust of air in the crack gap through the adjacent packer during the process of injecting the repair liquid through the packer on one side.

Claims (9)

In the repair liquid injection device for injecting the repair liquid into the crack of the building, A housing 510 whose upper portion is opened and an inner space is formed; A driving motor 530 accommodated in the housing 510 and generating power; A pump 600 connected to the housing 510 and pumped by the power of the driving motor 530, and connected to a suction pipe 601 for receiving the repair liquid and a discharge pipe 602 for discharging the sucked maintenance liquid; A repair liquid container 503 that is detachably connected to the suction pipe 601 and supplies a repair liquid; An injection hose 511 connected to the discharge pipe 602 to inject a repair liquid into the crack gap; The lid is rotatably coupled to the housing, the maintenance liquid injection device characterized in that it comprises a cover (520) for opening and closing the inner space. The maintenance liquid injection device of claim 1, further comprising a soundproof plate (504) for blocking driving noise of the driving motor (530) and the pump (600) on an open upper portion of the housing (510). 3. The repair liquid injecting device according to claim 1 or 2, further comprising a caster (501) on the bottom of the housing (510) to enable rolling movement. According to claim 1, wherein the pump 600 is formed with a suction port 672 and the discharge port 662 is connected to the suction pipe 601 and the discharge pipe 602, adjacent to the suction port 672 and the discharge port 662 A pump housing 610 in which a chamber 611 is formed; A cylinder 620 coupled to the pump housing 610; A piston 621 slidably coupled to the cylinder 620; A diaphragm 650 coupled to a lower end of the piston 621 and changing a pressure in the chamber 611 when the piston moves up and down; A pressure plate 630 in contact with an upper end of the piston 621; A rocking plate 640 oscillating with the power of the driving motor 530 to pressurize and release the pressure plate 630; Suction hole 671 is coupled to the inlet 672 of the pump housing 610 and the suction hole 671 is formed in communication with the chamber 611 on one side and the suction opening 675 is connected to the suction port 672 on the other side A valve seat 670; The discharge opening 665 is coupled to the discharge port 662 of the pump housing 610 and the discharge opening 665 is formed on one side and in communication with the chamber 611 and the discharge hole 661 communicated to the discharge port 662 on the other side. A valve seat 660; A suction valve plate 674 embedded in the suction valve seat 670 to close and close the suction opening 675 according to a pressure change in the chamber, and to close the suction opening 672 by a spring 673. ; The discharge valve plate 664 is built in the discharge valve seat 660 and closes and closes the discharge opening 665 according to a pressure change in the chamber and closes the discharge opening 665 by a spring 663. Maintenance liquid injection device comprising a. The repair solution injection device according to claim 1 or 4, wherein the repair solution is a cement admixture containing sand. In the concrete crack repair method of injecting the repair liquid into the cracks using the repair liquid injection device of any one of claims 1, 2 or 4. Forming a plurality of primary holes in a crack gap of the concrete structure at a constant diameter, a predetermined depth, and a predetermined interval; Forming a concrete core portion through which the crack gap passes in the bottom surface of the hole by forming a hole deeper by using a core drill equipped with a hollow core bit in each of the primary holes; Impacting the concrete core part to cut the concrete core part attached to each hole; and Cleaning concrete ground powder or dust along each of the perforated holes and cracks; and Coupling a hollow rubber sleeve having a threaded portion to an inner circumferential surface of the perforated hole; Coupling a hollow packer body having a screw coupling portion screwed to a screw portion of the rubber sleeve and a nozzle portion connected to an injection hose of the injection device, to the rubber sleeve; Coupling a repair liquid filled with a repair liquid to the suction pipe; Connecting the nozzle part and the injection hose of the packer body and driving the driving motor to drive the pump; Injecting a repair liquid through the nozzle unit into the crack gap; Closing the nozzle part with a cap member after injecting the repair liquid; And cutting and finishing the packer body and the rubber sleeve protruding from the surface of the concrete structure after the injected repair solution is cured. Concrete repair repair method using a repair solution injection device comprising a. The method of claim 6, wherein after attaching the packer body to the rubber sleeve, attaching a confirmation window formed with a repair liquid receiving space communicating with the crack gap between the holes, and between the confirmation window and the holes; Concrete crack repair method using a repair solution injection device comprising the step of sealing to prevent leakage of the repair solution along the crack gap. 8. The method of claim 7, wherein the sealing step comprises attaching a sealing tape along a crack gap. 7. The method of claim 6, wherein the repair solution is a cement admixture mixed with sand.

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