KR100989428B1 - The structure repair method of construction for which mortar, this injection equipment and this were used - Google Patents

Abstract

An object of the present invention is to provide a spray device for refractory coating and repair of the structure by injecting mortar or paint with low pressure air and low pressure transfer pressure, and a structure repair method using the same.
The injection device according to the present invention for achieving the above object has a constant inclination at the lower side and at the same time the inlet is formed to introduce the mortar or paint and the injection nozzle body made of a cylindrical shape; An air supply nozzle screwed to an outer side of the distal end of the injection nozzle body and supplied with air and formed in a cylindrical shape; An injection nozzle having a taper which is screwed to the inside of the air supply nozzle and has an inner diameter that is narrowed from one side to the other side; An air chamber screwed to a rear surface of the injection nozzle body and formed in a cylindrical shape; An air motor fixedly installed inside the air chamber; At the same time it is connected to the air motor, characterized in that consisting of a rotating shaft mounted inside the injection nozzle body.
In addition, the structure repair method using the injector according to the present invention for achieving the above object is a spray made of a cylindrical shape at the same time the inlet is formed to enter the mortar or paint with a constant inclination at the lower side A nozzle body; An air supply nozzle screwed to an outer side of the distal end of the injection nozzle body and supplied with air and formed in a cylindrical shape; An injection nozzle having a taper which is screwed to the inside of the air supply nozzle and has an inner diameter that is narrowed from one side to the other side; An air chamber screwed to a rear surface of the injection nozzle body and formed in a cylindrical shape; An air motor fixedly installed inside the air chamber; It is connected to the air motor and at the same time is injected into the injection device consisting of a rotating shaft mounted inside the injection nozzle body, characterized in that to repair the structure by spraying mortar or paint with the injection device.

Description

The structure repair method of construction for which mortar, this injection equipment and this were used}

The present invention relates to an injection device and a method for repairing a structure using the same, and in particular, the injection device for repairing the structure by spraying a special mortar or paint, such as a neutralized mortar, salt prevention mortar with a low pressure air and a low pressure feed pressure and using the same It is about structure repair method.

Mortar is generally a mixture of cement with fine aggregate and water, as is well known. Mortar is a material that has been in development for hundreds of years and is one of the most used building materials. Research on improving the properties of such mortars has been continuously conducted, and mortars in the form of mixed admixtures in addition to cement, fine aggregate, and sand have been developed. Recently, in order to compensate for the weak tensile strength, which is a disadvantage of mortar, cement, fine aggregate, In addition to water and various admixtures described above, fiber reinforced mortars including short fibers for strengthening tensile strength are commercially available, and fiber reinforced mortars containing short fibers are used to reinforce deteriorated areas of reinforced concrete structures. Growing.

The construction of the fiber-reinforced mortar is widely used, such as a method of applying directly to the deteriorated portion of the reinforced concrete structure by the worker or spraying the mortar by mortar spraying device, and then finishing the mortar with a plastering knife, mortar spraying device The method according to the present invention is much more efficient and can be quickly installed.

A mortar injector used in the construction of fiber reinforced mortar is shown in FIG. 1. Mortar injector shown in Figure 1 is generally used as an injector of the fiber reinforced mortar injector used for the construction of shotcrete used in tunnels and the like.

Shotcrete refers to concrete that is sprayed by using compressed air and is commonly used in tunnel construction. Such shotcrete is hardened in a short period of time by being sprayed on the ceiling or wall of the tunnel during the construction of the tunnel. Conventional mortar spraying device for shotcrete is designed to spray mortar at very high pressure because it is a device for spraying shotcrete to the ceiling of a tunnel to keep the injected shotcrete adhered to the ceiling without falling down. When these devices are used in the construction of mortars, fiber reinforced mortars are also sprayed at very high pressures.

The conventional mortar injector is composed of a main body 1, a nozzle 2 and a gas chamber (3). One end of the main body 1 is connected to a mortar hose 5 for transporting mortar, and the other end is connected to the nozzle 2. One end of the nozzle 2 is connected to the main body 1, the other end is exposed to the outside, and the taper portion 2a is provided with a narrower inner diameter toward the other end, so that the feed rate of the mortar is increased by the nozzle ( The faster it goes to the other end of 2). The gas chamber 3 is provided in the main body 1 and is connected to the high pressure gas pipe 6.

The inner circumferential surface of the main body 1 has a circular cross section, and the gas chamber 3 is an annular space formed between the inner circumferential surface and the outer circumferential surface of the main body 1.

The gas passage 4 is a hole connecting the gas chamber 3 and the inner circumferential surface of the main body 1 to each other, and is formed in plural along the circumferential direction of the inner circumferential surface of the main body 1, based on the center of the inner circumference of the main body 1. Four points are installed in the form of point symmetry.

The mortar moves from the mortar hose 5 along the main body 1 and the nozzle 2 in the direction indicated by the bold arrow in FIG. 1, and is then sprayed to the point where the mortar should be constructed.

At this time, as indicated by the arrows in FIG. 1, the injection speed of the mortar is increased by the high pressure gas moving along the gas chamber 3 and the gas passage 4 from the high pressure gas pipe 6.

In the case of the conventional mortar injector, a plurality of gas passages 4 are provided along the circumferential direction of the inner circumferential surface of the main body 1, but the position of the end portion inside the main body 1 of the gas passage 4 is one plane. As there is a disadvantage in that the efficiency is lowered in the process of promoting the mortar is present in the inside, high air pressure of the gas flowing through the high-pressure gas pipe (6) is required to efficiently inject the mortar.

On the other hand, in the case of the conventional mortar injector as described above, the length of the nozzle 2 is formed longer than the length of the main body 1, which is between the end of the nozzle 2 and the construction position, which is a construction characteristic of shotcrete. There is a distance of, the straightness of the mortar to be sprayed is required, because the longer the length of the nozzle (2) the straightness is improved.

However, since the fiber reinforced mortar contains shorter fiber for reinforcement and has higher viscosity than shotcrete, when the length of the nozzle 2 is long, when the fiber mortar is sprayed, between the inner circumferential surface of the nozzle 2 and the fiber reinforced mortar Since the mortar injector vibrates violently due to the friction force, there is a difficulty in construction and there is also a problem that the nozzle 2 is clogged.

Accordingly, the present invention has been made to solve the problems described above, the injection device for repairing the structure by spraying a special mortar or paint, such as neutralized mortar, salt prevention mortar with low pressure air and low pressure feed pressure And to provide a structure repair method using the same has an object.

Injector according to the present invention for achieving the above object has a constant inclination in the lower side and at the same time the inlet is formed to enter the mortar or paint and the injection nozzle body made of a cylindrical shape; An air supply nozzle screwed to an outer side of the distal end of the injection nozzle body and supplied with air and formed in a cylindrical shape; An injection nozzle having a taper which is screwed to the inside of the air supply nozzle and has an inner diameter that is narrowed from one side to the other side; An air chamber screwed to a rear surface of the injection nozzle body and formed in a cylindrical shape; An air motor fixedly installed inside the air chamber; At the same time it is connected to the air motor, characterized in that consisting of a rotating shaft mounted inside the injection nozzle body.

In addition, the structure repair method using the injector according to the present invention for achieving the above object is characterized in that to inject the mortar or paint to the injector, and to repair the structure by spraying the mortar or paint with the injector.

As described above, the injection device and the structure repair method using the same according to the present invention is very high or during the transport pressure generated when injecting a special mortar or paint for neutralization and salt prevention containing a large amount of fiber to the injection device It is to solve the blockage of the supply of special mortar or paint, and by removing the tubular tapered section, which is the injection section of special mortar or paint, and improving the fluidity of special mortar or paint by applying mechanical force, There is an advantage that the injection of the paint is made.

In particular, by controlling the amount and air amount of the special mortar or paint supplied to the special mortar or paint injector, the spray nozzle is selected according to the spray rate of the special mortar or paint and the shape of the object to form a uniform coating thickness. There is an effect of improving the problem of clogging due to the use of high-viscosity mortar generated in the conventional spray guns and the separation of the material of the mortar or paint and the problem of agglomeration and spraying.

1 is a cross-sectional view showing a conventional mortar injector,
Figure 2 is a perspective view of the injector according to the present invention,
3 is a sectional view showing an injector according to the present invention;
4 is an exploded cross-sectional view showing an injector according to the present invention;
5 is an exemplary view showing a process of injecting mortar or paint using the injector according to the present invention.

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

2 is a perspective view showing an injector according to the present invention, FIG. 3 is a cross-sectional view showing an injector according to the present invention, FIG. 4 is an exploded cross-sectional view showing an injector according to the present invention, and FIG. Exemplary diagram showing a process of injecting mortar or paint using the injector according to the invention.

As shown in these drawings, the injector according to the present invention has a constant inclination in the lower side and the inlet 110 is formed to enter the mortar or paint and at the same time the injection nozzle body 100 made of a cylindrical shape; An air supply nozzle (200) which is screwed to the outside of the distal end of the injection nozzle body (100) and is supplied with air and has a cylindrical shape; An injection nozzle (300) having a taper (310) having an inner diameter narrowed from one side to the other side and screwed to the inside of the air supply nozzle (200); An air chamber 400 screwed to a rear surface of the injection nozzle body 100 and formed in a cylindrical shape; An air motor 500 fixedly installed inside the air chamber 400; The rotary shaft 600 is connected to the air motor 500 and mounted inside the injection nozzle body 100.

In addition, the structure repair method using the injector according to the present invention is a mortar or paint, the injection nozzle body 100 is formed at the same time as the inlet 110 is formed to enter the mortar or paint with a constant inclination from the lower side at the same time )Wow; An air supply nozzle (200) which is screwed to the outside of the distal end of the injection nozzle body (100) and is supplied with air and has a cylindrical shape; An injection nozzle (300) having a taper (310) having an inner diameter narrowed from one side to the other side and screwed to the inside of the air supply nozzle (200); An air chamber 400 screwed to a rear surface of the injection nozzle body 100 and formed in a cylindrical shape; An air motor 500 fixedly installed inside the air chamber 400; It is connected to the air motor 500 and at the same time is injected into the injection device (A) consisting of a rotating shaft 600 mounted inside the injection nozzle body 100, by injecting the mortar or paint with the injection device (A) structure Repair

That is, the injection device (A) according to the present invention is the injection nozzle body 100, the air supply nozzle 200, the injection nozzle 300, the air chamber 400, the air motor 500 and the rotating shaft 600 is organic Is coupled to, the apparatus for ejecting high viscosity mortar or paint into the air of low pressure by using the principle that the flow of mortar or paint is increased by the air motor 500 and the rotating shaft 600 in a sol state while the fluidity is increased to be.

In this case, the injection nozzle body 100 is formed in a cylindrical shape at the same time as the inlet 110 is formed to introduce a mortar or paint while having a constant inclination at the lower side.

That is, the injection nozzle body 100 is formed as a cylindrical structure as a whole, the mortar or paint inlet 110 of the branch pipe form so that the mortar or paint flows into the lower side of the structure is formed, the mortar or paint inlet ( The diameter of 110 is formed to be larger than the diameter of the nipple that is the hose connector, so that the mortar or paint is not pressured until it reaches the injection nozzle (300).

In addition, the air supply nozzle 200 has a cylindrical structure at the same time the air is supplied, is screwed to the outside of the front end portion of the injection nozzle body (100).

That is, the air supply nozzle 200 is disposed outside and at the same time the air inlet hole 212 of the branch pipe shape is formed to protrude to a predetermined length to supply air from the lower side and at the same time the outer air supply nozzle made of a cylindrical shape ( 210; The inner air supply nozzle 220 is inserted into the outer air supply nozzle 210 and at the same time an air control valve 222 is formed on the side and is formed in a cylindrical shape. The payment inlet nozzle 700 is installed.

Here, the outer air supply nozzle 210 has one air inlet hole 212 is formed, the inner air supply nozzle 220 mounted therein is formed in the air passage in a circular coupling with the injection nozzle 300 Air is a structure in which the air pressure is evenly transferred to the inside of the injection nozzle (300).

In addition, the quickener inlet nozzle 700 is connected to the air inlet hole 212 side of the outer air supply nozzle 210, so that the fastener is automatically sprayed by mixing the air with the air pressure supplied to the air supply nozzle (200) It is a structure.

Here, the fastener is mixed with the fastener in a portion that needs to be thickly or in accordance with the site conditions to reduce the viscosity while maintaining the strength of the mortar or paint intact, while ensuring the viscosity of the state easy to transport Mortar or paint passes through the injector (A) while automatically spraying from the spray nozzle.

It is also noted that the viscous agent can be recovered to the level necessary for spraying when it is brought under pressure.

In addition, the injection nozzle 300 is a cylindrical structure formed with a taper 310 that narrows the inner diameter from one side to the other side, is screwed to the inside of the air supply nozzle (200).

Here, the injection nozzle 300 is an internal structure in which a taper 310 whose inner diameter is narrowed from one side to the other side is formed at the inner side and the front end of the air supply nozzle 200, and the air supplied from the air supply nozzle 200 It is a structure for rotating and supplying uniformly.

In particular, since the injection nozzle 300 is a structure that can be detachably attached to the air supply nozzle 200 by a screw or a socket, by forming a circular nozzle or a fan-shaped nozzle in accordance with the shape of the object of the mortar or paint to be sprayed Various spray angle patterns can be produced.

In addition, the air chamber 400 is a cylindrical structure, screwed to the rear of the injection nozzle body 100, the disk 800 is installed on one side and the other side of the air chamber 400, The disk 800 is generally formed in a disk shape, the center of the disk is made of hollow 810, the air passage 820 is formed in a portion spaced apart from the hollow 810 by a predetermined distance.

That is, the air chamber 400 is formed in a cylindrical shape as a whole, and has a structure installed in the axial direction of the air motor 500.

In addition, the air chamber 400 is provided with a disk 800, the disk 800 has a hollow 810 is formed in the center, one or more air passages (up, down, left, right) around the hollow 810 ( 820 is formed.

Here, the compressed air flowing into the air chamber 400 is introduced through the air control valve 410, the appropriate amount is introduced through the air passage 820 of the disk 800 in the direction of the injection nozzle 300 of the rotating shaft 600 Flows.

In particular, the air chamber 400, by supplying compressed air to the injection nozzle body 100, improves the conveying pressure and fluidity of the inflowing mortar or paint, by adjusting the gap of the cone portion 610 of the rotating shaft 600 When adjusting the mortar or paint injection amount, it is possible to improve the transfer pressure and fluidity, and to prevent foreign matter from adhering to the disk 800 on the air motor 500 side.

In addition, the air motor 500 is fixed to the inside of the air chamber 400 by a flange coupling to facilitate the screw or detachable, the air motor 500 is mounted on the inside of the rotating shaft 600.

Here, the rotary shaft 600 is coupled to the air motor 500, the tip of the rotary shaft 600 is formed with a cone-shaped cone 610, the outer diameter of the rotary shaft 600 and the inner diameter of the injection nozzle body 100 It is noted that the gap width can be adjusted to be used by adjusting the gap width in consideration of the mortar or paint viscosity and thixotropy.

At this time, the injection amount of the mortar or the paint can be adjusted according to the amount of compressed air supplied from the air chamber 400, and the gap adjustment is made by screwing the air motor 500 and the injection nozzle main body 100 to the degree of tightening. The gap can be adjusted arbitrarily.

In addition, the air motor 500 for operating the rotary shaft 600 uses AC or DC power, hydraulic or pneumatic pressure, and preferably using pneumatic pressure.

The RPM per minute of the air motor 500 is set to 1000-2000, and in the case of mortar or paint having low fluidity, the mortar or paint delivered to the injection device A through the transfer hose at a RPM of 50-200. A double agitation imparts fluidity and is sprayed onto the subject with fine mortar or air pressure with little paint.

On the other hand, in the case of high density low viscosity mortar or paint, the rotating shaft 600 is rotated at a high speed and sprayed onto the subject as very fine particles using the principle of increasing fluidity in a sol state.

On the other hand, between the injection device (A) and the pump pump (P), the signal device uses a hand signal or a wireless device, but the light emitting device LED method, the signal is blue (On / Start), red (Off / Stop), It is yellow (attention, preparation).

This is because the existing signal system between the injection device (A) and the mortar or paint pump (P) in the field is not smooth and must be supplied and stopped at an appropriate time.Because it is too heavy for the pump or pump of mortar or paint, Under pressure, the fluidity of the transfer hose is reduced, causing clogging and damage to the air motor 500 and the mortar or paint pressure pump (P), and the wear of the parts is severe. As friction heat is generated, it affects the hardening process of the mortar or the paint, thereby affecting the quality of the product, in particular, the compressive strength. If the rotating shaft 600 is continuously rotated without the mortar or the paint is sprayed, material separation occurs by centrifugal force.

In this case, when the mortar or the paint pressure pump (P) is used as a mono pump, worn parts such as a rotor and a pressure feed hose should be replaced when the mortar or the paint is used for 30 to 40 tons. By passing to the mortar or paint pressure pump (P) side, the use efficiency of the equipment can be increased to 50 ~ 60 tons, and also because the number of separate signals can be reduced, the labor cost can be expected to be reduced by about 30%.

In addition, by appropriately using the signal device, by spraying at a uniform pressure, it is possible to reduce the novelty, progressiveness, and cost in the pouring process, and the improvement effect of reducing the wear of the parts is greatly reduced, thus reducing the cost of equipment by 50-60%. In addition, labor cost is reduced by reducing the number of workers, and the prevention of material separation in the monopump does not cause fiber agglomeration or material separation. Therefore, it is possible to drastically reduce the curing process and subsequent cracking after site casting.

On the other hand, a DC power source or an AC power source is used for the signal device, and a DC power source is recommended because of a risk of electric shock.

The signal device is attached to the injection nozzle body 100 or the outside of the injection device A so as not to be out of view when using the injection device A and the mortar or paint pressure pump P.

Hereinafter, the operation of the injector according to the present invention having the configuration as described above will be described.

Injector (A) according to the present invention, when the air produced from the air compressor (C) is supplied to the air motor 500 of the injector (A), the rotating shaft 600 connected to the air motor 500 is rotated When the mortar or the paint is supplied to the injection nozzle main body 100 through the mortar or the paint inlet 110 of the injection nozzle main body 100 by the mortar or the paint pressure pump P, the air and the rotary shaft 600 rotates. Stirring of the mortar or paint is made, and through this process, the mortar or paint is applied to the rotational force and the behavior occurs in a good fluidity state.

In this soft mortar or paint is a mortar or paint in which the injection particles are very finely dispersed by the air ejected from the injection nozzle 300 is applied to the surface to be coated through the injection nozzle (300).

Here, the mortar or paint supplied through the mortar pressure pump (P) and the supply hose is supplied to the sludge (Seludge) of the gel (Gel) state with a large specific gravity and low fluidity because the supply flow rate is very slow.

Furthermore, in the case of mortar or paint, material separation occurs during the transfer process. Therefore, such a mortar or paint cannot form fine mortar or paint injector by spraying only with air, so the rotating shaft 600 is rotated to double agitation, transfer capacity, and fluidity. And spray on the subject with low air pressure.

And the stirring blade 610 shape of the rotating shaft 600 is a screw type, spiral or protrusion type.

Here, the shape of the stirring blade 610 of the rotating shaft 600 in the case of using a high density low viscosity mortar or paint has a low fluidity, conical shape, high speed rotation, good fluidity and injection of very fine particles Is possible.

The rotating shaft 600 is easily coupled to the air motor 500 according to the wear or the characteristics of the material.

That is, when the injection device (A) according to the present invention is supplied to the air motor 500 and the air chamber 400 and the air supply nozzle 200 of the injection device (A), the air produced from the air compressor (C), The rotating shaft 600 connected to the air motor 500 is rotated, the air is ejected from the injection nozzle 300, the mortar or paint by the mortar or paint pump pump (P) through the mortar or paint inlet 110 When supplied to the injection nozzle body 100, the mortar or paint is agitated by the rotating shaft 600, and a conveying pressure is formed. Through this process, the rotational force is applied to improve the fluidity and the dispersed mortar evenly sprayed particles. Alternatively, the paint is applied to the surface to be repaired of the structure through the injection nozzle 300 by the air supplied from the air chamber 400 and the air supply nozzle 200.

Here, when the mortar or paint is sprayed, the mortar or paint can be efficiently sprayed by reducing the RPM of the air motor 500, reducing the air supply amount of the air chamber 400, and increasing the air pressure of the spray nozzle 300. .

In addition, by adjusting the gap width of the outer diameter of the cone 610, the tip of the rotary shaft 600 and the inner diameter of the injection nozzle 300, and adjusting the amount of air supplied from the air chamber 400, the injection amount and the injection width is adjusted Let's find out.

Here, since the injection nozzle 300 is a structure that can be detachably attached to the air supply nozzle 200 by a screw or a socket type to form a circular nozzle or a fan-shaped nozzle according to the shape of the object to be sprayed mortar or paint various The pattern of the spray angle can be produced.

On the other hand, the operating sequence of the injection device (A) first connects the air hose to the air motor 500, the air chamber 400 and the air supply nozzle 200, and the transfer hose connected to the mortar or paint pressure pump (P) After connecting to the injection device (A), the shape of the injection nozzle 300 is selected according to the work plan of the subject and connected to the air supply nozzle (200).

First, the air compressor C is operated to supply air to the air motor 500, the air chamber 400, and the air supply nozzle 200, and then the mortar or the paint pressure pump P is operated to provide mortar or The paint is injected into the injection nozzle body 100 through the mortar or the paint inlet 110 and at the same time the injection is made from the injection nozzle 300.

The distance between the object and the spray nozzle 300 is about 50 cm, and the air pressure is adjusted to uniformly spray the mortar or paint without being discharged by being bound or aggregated, and evenly spraying a wide surface so that a large amount is not sprayed in one place. do.

When injecting the mortar or paint containing a large amount of fiber in the injector (A) according to the present invention having the configuration and operation as described above, the mortar or the problem that the supply of mortar or paint is blocked on the way By improving the fluidity of the paint by applying a mechanical force, there is an advantage that the injection of the mortar or paint smoothly.

In particular, by controlling the amount of the mortar or the paint supplied to the injection device (A) and the amount of air, by selecting the appropriate injection nozzle 300 according to the injection speed of the mortar or the paint and the shape of the object, to form a uniform coating thickness It improves the problem of clogging due to the use of high-viscosity mortar or paint generated from the conventional spray gun and the problem of material separation and the spraying of the mortar or paint, resulting in a smooth spraying of the mortar or paint.

100: spray nozzle body
110: mortar or paint inlet
200: air supply nozzle 210: outer air supply nozzle
212: air inlet hole 220: inner air supply nozzle
222: air control valve 300: injection nozzle
310: taper 400: air chamber
410: air control valve 500: air motor
600: rotation axis 610: cone portion
620: stirring blade 700: rapid inlet nozzle
800: disk 810: hollow
820: Air passage A: Injector
C: Air Compressor M: Mortar or Paint Mixer
P: mortar or paint pressure pump

Claims (10)

An injection nozzle body (100) formed at the same time as the inlet (110) is formed to introduce a mortar or a paint while having a predetermined inclination at the lower side thereof; An air supply nozzle (200) which is screwed to the outside of the distal end of the injection nozzle body (100) and is supplied with air and has a cylindrical shape; An injection nozzle (300) having a taper (310) having an inner diameter narrowed from one side to the other side and screwed to the inside of the air supply nozzle (200); An air chamber 400 screwed to a rear surface of the injection nozzle body 100 and formed in a cylindrical shape; An air motor 500 fixedly installed inside the air chamber 400; It is composed of a rotating shaft 600 connected to the air motor 500 and mounted inside the injection nozzle body 100, and the air supply nozzle 200 is arranged to supply air from the lower side and at the same time disposed outside. An outer supply nozzle 210 formed at the same time as the air inlet hole 212 having a branch shape having a length formed thereon and having a cylindrical shape; The injection device, characterized in that it is inserted into the outer supply nozzle 210 and at the same time the air control valve 222 is formed on the side and the inner air supply nozzle 220 made of a cylindrical shape. delete The method of claim 1,
The air inlet hole 212 is a spray device, characterized in that the rapid inlet nozzle 700 is installed. The method of claim 1,
The disk 800 is installed on one side and the other side of the air chamber 400, the disk 800 is formed in a disk shape as a whole, the center of the disk is made of a hollow 810, the hollow 810 Injector, characterized in that the air passage 820 is formed in a portion spaced from the predetermined interval. delete An injection nozzle main body 100 formed at the same time as the inlet port 110 is formed to introduce the mortar or the paint into the mortar or the paint while having a constant inclination at the lower side thereof; An air supply nozzle (200) which is screwed to the outside of the distal end of the injection nozzle body (100) and is supplied with air and has a cylindrical shape; An injection nozzle (300) having a taper (310) having an inner diameter narrowed from one side to the other side and screwed to the inside of the air supply nozzle (200); An air chamber 400 screwed to a rear surface of the injection nozzle body 100 and formed in a cylindrical shape; An air motor 500 fixedly installed inside the air chamber 400; It is composed of a rotating shaft 600 connected to the air motor 500 and mounted inside the injection nozzle body 100, and the air supply nozzle 200 is arranged to supply air from the lower side and at the same time disposed outside. An outer supply nozzle 210 formed at the same time as the air inlet hole 212 having a branch shape having a length formed thereon and having a cylindrical shape; Injected into the injection device (A) consisting of the inner air supply nozzle 220 made of a cylindrical shape while being inserted into the inner side of the outer supply nozzle 210 and the air control valve 222 is formed on the side, the injection device (A) repairing the structure using the injection device, characterized in that for repairing the structure by spraying mortar or paint. delete The method of claim 6,
The air inlet hole 212 is a structure repair method using a spray device, characterized in that the rapid inlet nozzle 700 is installed. The method of claim 6,
The disk 800 is installed on one side and the other side of the air chamber 400, the disk 800 is formed in a disk shape as a whole, the center of the disk is made of a hollow 810, the hollow 810 Structure repair method using the injector, characterized in that the air passage 820 is formed in a portion spaced from the predetermined interval. delete

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