Mobile concrete repair material injection device

Abstract

To provide a movable concrete repair material injection device which can uniformly and smoothly inject a repair material which is a mixture of a main agent and a curing agent into a crack part of a concrete structure, and which enhances durability of a motor being used.SOLUTION: A movable concrete repair material injection device includes: an under carriage frame including a movable piece and a handle; tanks for storing a main agent and a curing agent respectively; pumping means for pumping the main agent and the curing agent stored in the tanks respectively by a drive part of a motor; and an injection nozzle for mixing the main agent and the curing agent by the pumping means to make a repair material, and for injecting the repair material into a crack of a concrete structure. Chemical supply means which receives a chemical from the tanks and transfers it to the injection nozzle includes: first and second operation blocks comprising a cylinder for discharging the chemical and a piston; first and second supply pipes for supplying the chemical from the tanks; first and second transfer pipes for transferring the chemical to the injection nozzle; and pressure regulator for regulating a discharge pressure of the chemical.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mobile concrete repair material injection device, and more particularly to a mobile concrete repair material injection device that can uniformly and smoothly inject repair material, which is a mixture of a base agent and a hardener, into cracks in concrete structures and improve the durability of the motor used. [Background technology]

[0002] In general, cracks occur in concrete buildings and civil engineering structures for a variety of reasons, and if foreign matter such as rainwater seeps into these cracks, the rainwater will seep further into the building due to capillary action, and will expand in volume due to temperature changes or pressure differences, further widening the gap or corroding the reinforcing steel bars that make up the internal foundation structure, and in severe cases, causing the structure to collapse.

[0003] Therefore, to repair the cracks, a repair liquid is injected. Typically, this is done by injecting the repair liquid into the crack using a repair liquid injection device. That is, the repair liquid injection device forcibly injects, for example, an epoxy mixture of a base agent and a hardener, and the epoxy seals the crack as it solidifies, or the adhesive strength of the epoxy creates a waterproof seal or prevents further cracking.

[0004] Conventional epoxy injection devices have a problem where the base resin and hardener leak as the piston moves back and forth linearly inside the cylinder. To solve this problem, multiple water stop rings made of materials such as rubber or silicone are attached to the piston. However, due to the characteristics of the water stop ring material, wear occurs, which causes leakage of the base resin and hardener over time and can also cause the water stop ring to come off.

[0005] A patent document for solving such problems is Korean Patent No. 10-2020009, which was granted by the present applicant. The patent document discloses a chassis frame having movable wheels and a handle, tanks mounted on the chassis frame and storing a base agent and a hardener therein, pumping means for pumping the base agent and the hardener stored in the tanks, and an injection nozzle for mixing the base agent and the hardener pumped by the pumping means to form a repair material and injecting the repair material into cracks in a concrete structure. The pumping means comprises first and second cylinders detachably attached to the chassis frame, connected to the tanks via piping, and receiving the base agent and the hardener stored in the tanks, first and second pistons driven by a drive unit to move linearly back and forth inside the first and second cylinders to pump the base agent and the hardener, respectively, and first and second return springs movably installed in front of the first and second pistons via first and second return springs, and when the first and second pistons advance, they advance by the hydraulic pressure of the base agent and the hardener and supply the base agent and the hardener to the injection nozzle through the surrounding parts, and the first and second pistons the first and second backflow prevention valves closing discharge holes through which the base and hardener are discharged when the tonneau is reversed, the first and second backflow prevention valves including first and second valve bodies opening and closing the discharge holes, first and second core parts formed on one side of the first and second valve bodies to have a smaller outer diameter than the first and second valve bodies, and first and second spring fixing parts formed on the first and second core parts to have a smaller outer diameter than the first and second core parts and having one side of the first and second return springs fixed to their peripheries; a first guide hole formed inside the first and second spring fixing parts to open toward the injection nozzle, and into which a base material and a hardener flow when the first and second pistons move backward, thereby assisting the backward movement of the first and second valve bodies; and a first and second side guide hole formed inside the first and second core parts to open toward the periphery, and to communicate with the first and second guide hole, and which is arranged radially, and which prevents contamination due to stagnation of the base material and the hardener,While it can move freely within a concrete structure and inject repair material into cracks that need repair, there are problems with the repair material leaking from inside the piston and cylinder, and the motor's output limit from continuous operation often causes minor motor malfunctions, making it difficult to adjust the amount of repair material dispensed.

[0006] Therefore, an improved repair material injection device was needed that could be adjusted based on the repair material discharge rate and the motor drive limit. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Korean Patent Registration No. 10-2020009 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, in order to solve the above-mentioned problems, an object of the present invention is to provide a mobile concrete repair material injection device that can move freely within a concrete structure, inject a main compound and a hardener into the crack by the pumping motion of a piston at the crack, repair the crack, and reliably prevent backflow of the main compound and hardener, thereby preventing contamination of the concrete structure due to leakage of the main compound and hardener and also preventing damage to equipment.

[0009] Another object of the present invention is to provide a mobile concrete repair material injection device that not only regulates a constant amount of chemical discharge but also prevents damage to the motor due to its capacity and rotation speed by providing pressure regulators connected to first, second, and third check valves on the path along which the chemical moves. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the present invention provides a mobile concrete repair material injection device including a chassis frame having a movable top and a handle, tanks mounted on the chassis frame and storing a base agent and a hardener, respectively, which are chemical liquids, pumping means for pumping the base agent and the hardener stored in the tanks by a motor drive unit, and an injection nozzle for mixing the base agent and the hardener, respectively, which are chemical liquids, to form a repair material by the pumping means and injecting the repair material into cracks in a concrete structure, wherein chemical liquid supply means are separately provided on both sides between the pumping means and the injection nozzle, respectively, and receive the chemical liquid from the tank and transfer it to the injection nozzle, and are connected to the pumping means, a first and second operating block consisting of a cylinder and a piston for discharging the chemical; first and second supply pipes connected to one side of the first and second operating blocks and for supplying the chemical from a tank; first and second transfer pipes connected to the front of the first and second operating blocks and for transferring the chemical to the injection nozzle; and a pressure regulator connected to one of the first and second transfer pipes and for adjusting the discharge pressure of the chemical, wherein the mobile concrete repair material injection device is configured to inject the repair material while adjusting the discharge rate of the chemical by adjusting first and second check valves for preventing backflow, respectively, installed inside the first and second transfer pipes and a third check valve linked to the pressure regulator.

[0011] The first and second operating blocks may include first and second piston rods connected to the pumping means by pins, first and second cylinders to which the first and second piston rods are connected and which are open on both longitudinal sides, oil seals fitted to rear portions of the first and second cylinders to prevent leakage of the chemical solution, and sockets through which the first and second piston rods pass and which are screwed to finish the rear portions of the oil seals, and the first and second piston rods may include O-rings on outer peripheral surfaces of one ends thereof.

[0012] In addition, the O-rings provided on the outer circumferential surfaces of the first and second piston rods may be characterized by comprising at least three O-rings coupled at regular intervals along the outer circumferential surfaces of the first and second piston rods.

[0013] The first and second transfer pipes may include a transfer pipe body, a transfer passage through which the chemical solution is transferred, and a valve seating step formed in the transfer passage to have an inner diameter smaller than the inner diameter of the passage, and the valve seating step may include a first check valve and a second check valve, each of which includes a backflow prevention valve that opens and closes the passage and an elastic spring tightly connected to the backflow prevention valve.

[0014] The backflow prevention valve may further include a valve head portion supported by the valve seating step to open and close the transfer passage, a small-diameter core portion extending from one side of the valve head portion, and a spring fixing portion formed in the core portion with a smaller outer diameter than the core portion and to which an elastic spring is connected. To enhance the backflow prevention effect of the first and second check valves, the backflow prevention valve may further include a vertical guide hole inside the spring fixing portion that opens toward the transfer passage, and a horizontal guide hole formed inside the core portion and communicating with the vertical guide hole.

[0015] The pressure regulator may further include a pipe connection part connected to the first and second transfer pipes, a pipe connection part extending a certain length from the rear of the pipe connection part, and a pressure regulator body fixed to one upper side of the chassis frame, connected to the pipe connection part, and having a pressure adjustment knob for an adjustment switch on its upper side.

[0016] In addition, a third check valve is provided inside the first and second transfer pipes to which the pressure regulator is connected, for adjusting the pressure difference of the chemical solution transferred along the transfer pipes. An internal valve of the third check valve is opened and closed according to the adjustment of the pressure regulator. A pressure gauge is provided on one side of the injection nozzle from which the repair material is discharged, and the user can inject the repair material through the injection nozzle by adjusting the pressure regulator while checking the pressure gauge.

[0017] The tank may be characterized in that at least four protruding extensions are formed on the lower bottom, and internal guide grooves are formed on the inside of the protruding extensions to correspond to and engage with the protrusions protruding from the chassis frame, thereby stably supporting the tank located on the upper part of the chassis frame. [Effects of the Invention]

[0018] The present invention provides a mobile concrete repair material injection device that moves freely within a concrete structure, injects a base compound and a hardener into the crack using a piston pumping motion, and prevents backflow of the base compound and hardener, thereby preventing contamination of the concrete structure due to leakage of the base compound and hardener and also preventing damage to equipment.

[0019] In addition, the present invention is very easy to repair because the worker can easily carry the injection device to the crack in the concrete structure and inject the repair material into the crack at the repair site due to its small size and portable characteristics. In addition, the check valve quickly responds (returns) during the piston pumping process to reliably prevent the backflow of the main agent and hardener, thereby preventing the contamination of the concrete structure and damage to equipment due to the leakage of the main agent and hardener, and also preventing the loss of the main agent and hardener.

[0020] In addition, the present invention provides several O-ring structures on the piston shaft, thereby minimizing friction and enabling continuous and smooth operation.

[0021] In addition, the present invention has the effect of providing a mobile concrete repair material injection device that not only regulates a constant amount of chemical discharge by providing pressure regulators connected to the first, second and third check valves on the path along which the chemical moves, but also prevents damage to the motor due to its capacity and rotation speed through the pressure regulators. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is an overall perspective view illustrating a mobile concrete repair material injection device according to the present invention. [Figure 2] 1 is a schematic side view illustrating a pumping means and a chemical liquid supply means of a mobile concrete repair material injection device according to the present invention. [Figure 3] 1 is a schematic plan view illustrating a pumping means and a chemical liquid supply means of a mobile concrete repair material injection device according to the present invention. FIG. [Figure 4] 1 is a schematic plan view showing a mobile concrete repair material injection device according to the present invention, equipped with first and second piston rods connected to pumping means; FIG. [Figure 5] 2 is an enlarged view of a main part illustrating the first and second operating blocks of the chemical liquid supply means of the mobile concrete repair material injection device according to the present invention. FIG. [Figure 6] 2 is a diagram illustrating the first and second piston rods of the first and second operating blocks of the mobile concrete repair material injection device according to the present invention. FIG. [Figure 7] 3 is an enlarged view illustrating the main parts of the first and second check valves provided in the first and second transfer pipes of the chemical liquid supply means of the mobile concrete repair material injection device according to the present invention. FIG. [Figure 8] 10 is a diagram illustrating the backflow prevention valves of the first and second check valves of the chemical liquid supply means of the mobile concrete repair material injection device according to the present invention. FIG. [Figure 9] 10 is a diagram illustrating the connection of the tank to the top of the chassis frame of the mobile concrete repair material injection device according to the present invention. FIG. [Figure 10]10 is a diagram illustrating a power supply and connection cord portion connection port provided at the rear of the chassis frame of the mobile concrete repair material injection device according to the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] While the present invention can be modified in various ways and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description, but this is not intended to limit the present invention to the specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and alternatives that fall within the spirit and technical scope of the present invention.

[0024] The present invention is not limited to the embodiments disclosed below, and may be embodied in various different forms. However, these embodiments are provided so that the disclosure of the present invention will be complete and will fully convey the scope of the invention to those skilled in the art.

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when assigning reference numerals to components in each drawing, care should be taken to assign the same numerals to identical components even if they appear in different drawings. Furthermore, in the description of the present invention, if it is determined that a detailed description of related well-known structures or functions may obscure the gist of the present invention, such a detailed description will be omitted.

[0026] 1 to 10 show an embodiment of a mobile concrete repair material injection device according to the present invention.

[0027] 1 to 7, the mobile concrete repair material injection device according to the present invention includes a chassis frame 10, a tank 20 for storing and supplying a base agent and a hardener, respectively, a pumping means 50 for pumping the base agent and hardener in the tank 20 to inject them, and an injection nozzle 60 for mixing the base agent and hardener pumped by the pumping means 50 and injecting them.

[0028] In addition, chemical supply means 100 are provided on both sides between the pumping means 50 and the injection nozzle 60, respectively, to receive chemical from the tank 20 and transfer it to the injection nozzle 60.

[0029] The chassis frame 10 includes a base frame 11 and a top 13 rotatably attached to the bottom of the base frame 11.

[0030] The base frame 11 has an open structure with a bottom and peripheral walls, and the motor and drive unit of the pumping means 50 are installed inside.

[0031] Additionally, the top 13 may be provided with a stopper to prevent the device of the present invention from moving during injection of the repair material.

[0032] The tank 20 may include a central tank frame 21 and first and second tanks 22 and 23 formed on both sides of the tank frame 21 to store and supply a base agent and a hardener, respectively.

[0033] The tank frame 21 further includes a handle 24 on its upper side, allowing the tank frame 21 and the first and second tanks 22, 23 to be handled as a single unit.

[0034] In addition, the first and second tanks 22 and 23 are respectively arranged on the left and right sides of the tank frame 21 and are structured to store the main agent and hardener therein, and are provided with tank lids for refilling the main agent and hardener, and with transparent confirmation windows 25 that allow the amount of the main agent and hardener stored to be immediately checked without opening the tank lids.

[0035] Preferably, the first and second tanks 22, 23 are configured as a fixed type on the tank frame 21, or can be configured as a separable storage type on the tank frame 21.

[0036] The first and second tanks 22 and 23 are configured to be connected to first and second supply hoses 26 and 27 for supplying the base agent and the hardener, respectively, to the pumping means 50. The first and second supply hoses are opened and closed by manual valves (not shown), respectively.

[0037] Meanwhile, the tank 20 is configured to be mounted on the upper part of the chassis frame 10 and assembled, and at least four protruding extensions 28 are protruding from the lower bottom of the tank 20, and an internal guide groove 29 may be formed on the inside of the protruding extensions 28 to engage with the corresponding protrusions 14 protruding from the chassis frame. As a result, the tank 20 located on the upper part of the chassis frame 10 can be stably supported and the installation (mounting) thereof can be easily configured.

[0038] The chassis frame 10 may also be configured to include a power cord unit 15 for connecting a power source and an adjustment switch connection unit 16 for connecting a pressure regulator at one rear side. Here, the power cord unit 15 and the adjustment switch connection unit 16 both have the same two-port connection port configuration, allowing free connection regardless of the position of the connection port, so that even an amateur can freely connect to any connection port and use it without electrical accidents.

[0039] As shown in FIGS. 2 and 3, the pumping means 50 includes a motor 51, a driving gear 52 that rotates by the rotational force of the motor 51, a driven gear 53 that rotates in mesh with the driving gear 52, a crankshaft 54 ​​that is connected to one side of the driven gear 53 and rotates to convert the rotational motion into a linear reciprocating motion, a linearly moving operating shaft 55 that moves linearly reciprocally due to the crankshaft 54, and a switch that turns the motor 51 on and off.

[0040] The motor 51 is mounted on the chassis frame 10 , and its drive shaft is inserted into the chassis frame 10 and connected to a drive gear 52 .

[0041] In addition, the present invention can also use an electric tool carried by a worker at a construction site in place of a motor.

[0042] Preferably, the drive gear 52, the driven gear 53, the crankshaft 54, and the linearly moving operating shaft 55 are mounted within the base frame 11 of the chassis frame 10 so as to be capable of transmitting or converting power (converting rotational motion into linear motion).

[0043] The drive gear 52 also has a socket to which the rotation shaft of the motor 51 is connected.

[0044] The injection nozzle 60 includes first and second injection hoses 61, 62, each connected to a nipple of the pumping means 50, a mixing section 63, each connected to the first and second injection hoses 61, 62, for mixing the main agent and the hardener, a nozzle 64, which sprays the repair material mixed in the mixing section 63 and injects it into cracks in the concrete structure, and an injection adjustment valve 65, which controls the spraying and blocking of the repair material and also controls the spray amount.

[0045] In addition, the first and second injection hoses 61 and 62 may be configured in any manner that supplies the base agent and the hardener to the mixing section 63, respectively.

[0046] Preferably, the mixing section 63 is configured to mix the base agent and the curing agent supplied from the first and second injection hoses 61 and 62, respectively, and then supply the mixture to the nozzle 64. For example, the mixing section 63 comprises two inflow sections connected to the first and second injection hoses 61 and 62, respectively, to receive the base agent and the curing agent, and a single junction section where the inflow sections join together to mix the base agent and the curing agent.

[0047] The nozzle 64 is separably assembled at the confluence of the mixing section 63 to inject the repair material. The injection control valve 65 is, for example, a butterfly valve, and can be configured to open and close the nozzle 64 to control the injection of the repair material, and to be connected to a knob operated by an operator.

[0048] The chemical supply means 100 may include first and second operating blocks 110, 120, each consisting of a cylinder and a piston connected to the pumping means and discharging the chemical; first and second supply pipes 130, 140, connected to portions of the first and second operating blocks 110, 120 and supplying the chemical from the tank 20; first and second transfer pipes 150, 160, connected to front portions of the first and second operating blocks 110, 120 and transferring the chemical to the injection nozzle 60; and a pressure regulator 170, connected to one of the first and second transfer pipes 150, 160, for adjusting the chemical.

[0049] 2 to 4, the first and second operating blocks 110, 120 include first and second piston rods 111, 121 connected to the pumping means by pins P, first and second cylinders 112, 122 to which the first and second piston rods 111, 121 are connected and which are open on both longitudinal sides, oil seals 113, 123 fitted to the rear of the first and second cylinders 112, 122 to prevent leakage of the chemical solution, and sockets 114, 124 through which the first and second piston rods 111, 121 pass and which are screwed to finish the rear portions of the oil seals 113, 123.

[0050] Here, the oil seals 113 and 123 are retainers that connect the inner and outer wings and can be elastically deformed by an external force to create a watertight seal between the peripheries of the first and second piston rods 111 and 121 and the first and second cylinders 112 and 122.

[0051] Preferably, the first and second operating blocks 110, 120 may be directly connected to the linear movement operating shaft 55, or may be connected by a pin connection via first and second piston rods 111, 121 as shown in FIG. 4.

[0052] Meanwhile, the first and second piston rods 111 and 121 may further include O-rings 111a and 121a on the outer circumferential surfaces of one end thereof.

[0053] Here, the O-rings 111a and 121a formed on the outer circumferential surfaces of the first and second piston rods 111 and 121 may be composed of at least three O-rings joined at regular intervals along the longitudinal direction of the first and second piston rods 111 and 121.

[0054] This allows the O-rings 111a and 121a to provide a structure that minimizes the frictional force between the piston rod, which moves back and forth in a straight line through the bore passage, which is the inner wall of the cylinder, and the cylinder, while also minimizing the frictional force caused by the injection of grease (lubricating oil).

[0055] The first and second cylinders 112, 122 include first and second bore passages 112a, 122a inside which the first and second piston rods 111, 121 reciprocate, threaded connections 112b, 122b formed to communicate with the first and second bore passages 112a, 122a and connected to the first and second transfer pipes 150, 160, and first and second supply connectors 112c, 122c formed as through holes in parts of the first and second bore passages 112a, 122a and receiving the chemical solution from the tank 20.

[0056] The first and second supply pipes 130, 140 are connected to a portion of the first and second operating blocks 110, 120 to supply the chemical solution from the tank 20, and comprise supply pipe bodies 131, 141 to which the injection hoses 26, 27 of the tank 20 are connected, and sockets 132, 142 that are connected and fixed to the first and second operating blocks 110, 120.

[0057] The first and second transfer pipes 150, 160 are connected to the front of the first and second operating blocks 110, 120 and transfer the chemical solution to the injection nozzle 60. They comprise transfer pipe bodies 151, 161, transfer passages 152, 162 through which the chemical solution is transferred, and through-sockets 154, 164 connected to the front of the transfer passages 152, 162 through which the repair material is transferred.

[0058] In addition, the transfer pipe bodies 151 and 161 are configured so that first and second check valves 170 and 170A for preventing backflow are respectively installed on the transfer passages 152 and 162. Since the first and second check valves have the same configuration, only the configuration of the first check valve 170 will be described below. In Figure 3, the position of the check valve shown inside is indicated by the reference numeral 170.

[0059] Here, the transfer passages 152 and 162 include valve seating stages 153 and 163 formed to have a diameter smaller than the diameter of the passage, and the valve seating stages 153 and 163 may be provided with a first check valve 170 and a second check valve 170A, respectively, each of which includes a backflow prevention valve 171 for opening and closing the passage and an elastic spring 173 that is in close contact with the backflow prevention valve.

[0060] Meanwhile, the transfer pipes 150 and 160 may be configured to have through-sockets 154 and 164 connected to their portions, so as to support the ends of the elastic springs 173 and transfer the drug solution.

[0061] Here, the backflow prevention valve 171 has a size that is large enough to seal the passage hole but smaller than the diameter of the opening so that the base resin and hardener can be discharged, and the outer periphery may be curved so that the base resin and hardener can be sprayed naturally.

[0062] In addition, the backflow prevention valve 171 may include a valve head portion 171a supported by the valve seating steps 153 and 163 to open and close the transfer passages 152 and 162, a core portion 171b formed at an extension of the valve head portion 171a and having a small outer diameter, a spring fixing portion 171c formed to have a smaller outer diameter than the core portion 171b and to which an elastic spring 173 is connected, a vertical guide hole 171d inside the spring fixing portion 171c that opens toward the transfer passage in order to enhance the backflow prevention effect of the first and second check valves 170 and 170A, and a horizontal guide hole 171e formed inside the core portion 171b to communicate with the vertical guide hole 171d.

[0063] Here, the core portion 171b and the spring fixing portion 171c are formed to have an outer diameter smaller than that of the valve head portion 171a, and as the width of the transfer passages 152 and 162 increases, the outer diameters become smaller to induce rapid discharge of the base agent and the hardener. In addition, the step between the core portion 171b and the spring fixing portion 171c is used to support the end of the elastic spring 173.

[0064] Meanwhile, when the first and second piston rods 111 and 121 move backward, the base material and hardener in the transfer passages 152 and 162 flow into the vertical guide hole 171d, and the base material and hardener flowing into the vertical guide hole 171d cause the first and second check valves 170 and 170A to move backward more quickly, thereby blocking the discharge holes, which are transfer passages, with higher pressure.

[0065] In addition, the horizontal guide holes 171e are arranged radially inside the core portion 171b, opening toward the surrounding area, and are formed to communicate with the vertical guide holes 171d, thereby preventing contamination due to stagnation of the main agent and hardener that flow in through the vertical guide holes 171d.

[0066] Here, when the base material and the hardener are injected, the base material and the hardener can flow through the horizontal guide hole 171e and the vertical guide hole 171d.

[0067] The elastic springs 173 are coil springs, one end of which in the longitudinal direction is fitted around the periphery of the spring fixing portion 171c and supported by the core portion 171b, and the other end is supported on the inner peripheral surface of the sockets 154,164.

[0068] The pressure regulator 180 is connected to one of the first and second transfer pipes 150, 160 to adjust the chemical solution, and may include a pipe connection part 181 connected to be connected to the first transfer pipe 150, a pipe connection part 182 extending a certain length rearward of the pipe connection part 181, and a pressure regulator body 183 fixed to a portion of the upper part of the chassis frame 10, connected to the pipe connection part 182, and having a pressure adjustment knob 183a on the upper side.

[0069] Meanwhile, a third check valve 190 for adjusting the pressure difference of the chemical solution being transferred along the transfer pipe may be further provided inside the first transfer pipe 150 to which the pressure regulator 180 is connected.

[0070] Meanwhile, the third check valve 190 is a general piping check valve whose internal valve opens and closes according to the adjustment of the pressure regulator 180. Detailed description thereof will be omitted below, and the position of the third check valve shown internally in FIG. 3 is indicated by the reference numeral 190.

[0071] Meanwhile, a pressure gauge 70 is further provided in a portion of the injection nozzle 60 where the repair material is exposed, so that the user can smoothly inject the repair material through the injection nozzle 60 by adjusting the pressure regulator 180 while checking the gauge.

[0072] Hereinafter, the concrete structure repair process (fixing) using the concrete repair material injection device according to the present invention will be described.

[0073] After moving the concrete repair material injection device of the present invention to the repair position, place the injection nozzle 60 in the crack and turn it on. The pumping means 50 then injects the base agent and hardener in the tank 20 through the injection nozzle 60 to fill the crack as follows:

[0074] The motor 51, which is the driving unit, receives power and generates rotational force. This rotational force is transmitted to the driven gear 53 via the driving gear 52. The rotational force of the driven gear 53 is converted into linear reciprocating motion via the crankshaft 54 ​​and transmitted to the first and second operating blocks 110 and 120, which are the chemical solution supply means 100.

[0075] The linear reciprocating motion of the first and second operating blocks 110, 120 is transmitted to the first and second piston rods 111, 121, which reciprocate within the first and second cylinders 112, 122. When moving backward, they suck the base agent and hardener into the first and second cylinders 112, 122, and when moving forward, they push them toward the first and second transfer pipes 150, 160, and finally discharge them through the injection nozzle 60.

[0076] In addition, the pressure regulator 180 adjusts the pressure discharge of the repair material to a pressure level and plays a role in controlling the motor rotation speed, thereby preventing minor motor failures due to frequent rotation and improving the durability and efficiency of the device.

[0077] With the first and second check valves provided in the chemical supply means configured as described above, when the base and hardener are injected, they push against the first and second check valves, respectively, compressing the elastic springs. At this time, the base and hardener pass through the peripheries of the first and second check valves, which open, and are exposed to the discharge path. Some of the base and hardener flow in through the horizontal guide holes and are then discharged through the vertical guide holes. This improves the fluidity of the base and hardener compared to when they flow only along the peripheries of the first and second check valves. Furthermore, when they are discharged through the vertical guide holes, the speed of the base and hardener flowing along the peripheries is accelerated, preventing circulation problems for the base and hardener.

[0078] In addition, the pressure regulator not only adjusts the amount of exposed repair material that is discharged at a constant rate by the third check valve, but also adjusts the motor rotation speed by adjusting the amount of exposed repair material, thereby extending the motor's lifespan.

[0079] Although the present invention has been described based on the preferred embodiments as above, it is not limited to the above embodiments, and various modifications and variations may be made by a person having ordinary skill in the art to which the invention pertains within the scope of the technical concept of the present invention and the equivalent scope of the claims set forth below, without departing from the spirit of the present invention. [Explanation of symbols]

[0080] 100 Chemical solution supply means 110, 120 First and second operating blocks 111, 121 First and second piston rods 112, 122 cylinders 113, 123 Oil seal 114, 124 sockets 130, 140 First and second supply pipes 131, 141 Supply pipe body 132, 142 sockets 150, 160 First and second transfer pipes 151, 161 Transfer pipe body 152, 162 Transfer passage 153, 163 Valve seating stage 154, 164 sockets 170, 170A First and second check valves 180 Pressure Regulator 190 Third check valve

Claims

1. A mobile concrete repair material injection device including a chassis frame having a movable top and a handle, tanks mounted on the chassis frame and storing a base agent and a hardener, respectively, which are chemical liquids, pumping means for pumping the base agent and the hardener, respectively, stored in the tanks, by a motor drive unit, and an injection nozzle for mixing the base agent and the hardener, which are chemical liquids, by the pumping means to form a repair material, and injecting the repair material into cracks in a concrete structure, a chemical supply means provided separately on both sides between the pumping means and the injection nozzle, for receiving the chemical from the tank and transferring it to the injection nozzle, first and second operating blocks each consisting of a cylinder and a piston connected to the pumping means for discharging the liquid medicine; first and second supply pipes connected to one side of the first and second operating blocks and supplying the chemical solution from the tank; first and second transfer pipes connected to front portions of the first and second operating blocks and transferring the chemical solution to the injection nozzle; a pressure regulator connected to one of the first and second transfer pipes to adjust the discharge pressure of the chemical solution, The repair material is injected while adjusting the discharge amount of the chemical solution by adjusting first and second check valves for preventing backflow, which are provided inside the first and second transfer pipes, respectively, and a third check valve linked to the pressure regulator, The tank has at least four protruding extensions protruding from the lower bottom, and the inside of the protruding extensions is formed with internal guide grooves that correspond to and engage with protrusions protruding from the chassis frame, thereby stably supporting the tank located on the upper part of the chassis frame.

2. The first and second operating blocks are first and second piston rods connected to the pumping means by pins; first and second cylinders to which the first and second piston rods are coupled, each having open ends in a longitudinal direction; an oil seal fitted to the rear of the first and second cylinders to prevent leakage of the chemical solution; a socket through which the first and second piston rods pass and into which the oil seal is threadedly fitted to complete the aft portion of the oil seal; 2. The mobile concrete repair material injection device according to claim 1, wherein the first and second piston rods include O-rings on the outer circumferential surfaces of one end thereof.

3. 3. The mobile concrete repair material injection device of claim 2, wherein the O-rings provided on the outer surfaces of the first and second piston rods consist of at least three O-rings joined at regular intervals along the outer surfaces of the first and second piston rods.

4. The first and second transfer pipes each include a transfer pipe body, a transfer passage through which the chemical solution is transferred, and a valve seating step formed in the transfer passage to have an inner diameter smaller than the inner diameter of the passage, 2. The mobile concrete repair material injection device according to claim 1, wherein the valve seating stage is provided with a first check valve and a second check valve, each of which comprises a backflow prevention valve for opening and closing the passage and an elastic spring tightly connected to the backflow prevention valve.

5. The backflow prevention valve is a valve head portion supported by the valve seating step to open and close the transfer passage; a small-diameter core portion extending from one side of the valve head portion; a spring fixing portion formed on the core portion and having an outer diameter smaller than that of the core portion, the spring fixing portion being connected to the elastic spring; 5. The mobile concrete repair material injection device of claim 4, further comprising a vertical guide hole inside the spring fixing portion that opens toward the moving passage, and a horizontal guide hole formed inside the core portion that communicates with the vertical guide hole, as a configuration for enhancing the backflow prevention effect of the first and second check valves.

6. The pressure regulator is a pipe connection portion connected to the first and second transfer pipes; a pipe connecting portion extending a certain length from the rear portion of the pipe connecting portion; 2. The mobile concrete repair material injection device according to claim 1, further comprising: a pressure regulator body fixed to one upper side of the chassis frame, connected to the pipe connection portion, and having a pressure adjustment knob for an adjustment switch on the upper side.

7. a third check valve is provided inside the first and second transfer pipes to which the pressure regulator is connected, for adjusting the pressure difference of the chemical solution transferred along the transfer pipes; The third check valve has an internal valve that opens and closes according to the adjustment of the pressure regulator.

2. The mobile concrete repair material injection device according to claim 1, wherein a pressure gauge is provided on one side of the injection nozzle from which the repair material is discharged, and a user injects the repair material through the injection nozzle by adjusting the pressure regulator while checking the pressure gauge.

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