Spraying Apparatus for Applying an Eco-Friendly Epoxy Resin Composition to Naturally Occurring Asbestos to Prevent Asbestos Dust Dispersion

Abstract

The present invention relates to a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion, and is characterized by comprising: a movable carriage formed to move around the naturally occurring asbestos by means of wheels; a first storage tank formed on the upper part of the movable carriage to receive the epoxy resin composition and discharge it at high pressure; a second storage tank formed on the upper part of the movable carriage to receive the curing agent composition and discharge it at high pressure; a mixing tank that receives the epoxy resin composition and the curing agent composition, mixes them through a stirrer to form a mixture, and discharges it at high pressure; and a spraying unit connected to the mixing tank to spray the mixture onto the surface of the naturally occurring asbestos.

Description

Technology Field

[0001] The present invention relates to a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion. More specifically, the invention relates to a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion while moving freely around the naturally occurring asbestos, thereby preventing health hazards to residents near abandoned asbestos mines. Background Technology

[0002] Asbestos is a collective term for six types of silicate minerals that occur in fibrous form, specifically chrysotile, crocidolite, ochre, anthophyllite, tremolite, and actinolite.

[0003] Asbestos was designated as a Group 1 carcinogen by the International Agency for Research on Cancer (IARC) under the World Health Organization in 1986, and it is known that inhaling airborne asbestos through the respiratory system causes lung cancer, malignant mesothelioma, and asbestosis after a latency period of 10 to 40 years.

[0004] Developed countries such as Europe have completely banned the use of asbestos since the early 2000s, and Korea has banned the use of asbestos since 2009.

[0005] Currently, 125 million workers worldwide are exposed to asbestos, and it is estimated that about 90,000 people die each year from diseases related to asbestos exposure, such as asbestosis, lung cancer, and malignant mesothelioma.

[0006] Specifically, in countries that used a lot of asbestos in the past, such as the UK and Australia, it is estimated that 3,000 to 4,000 people die each year from asbestos-related diseases, and in the Metsobo region of Greece, the Metintas, Baris, and Yazicioglu regions of Turkey, and the New Caledonia region, dozens of asbestos victims occur per 100,000 people per year.

[0007] In Korea, dozens of asbestos mines were developed by the Japanese during the colonial period before liberation, and mining continued steadily after liberation along with economic development, with a total of 145,000 tons mined by 1990 and a total of 1.3 million tons imported by 2008, which were used as raw materials for over 2,000 types of products including asbestos slate, asbestos ceiling tiles, asbestos gaskets, asbestos brake linings, and asbestos cloth.

[0008] As a result, as of the end of August 2024, the number of asbestos victims who received compensation for damages due to asbestos-related diseases under the Asbestos Damage Relief Act was tallied at 12,451. Furthermore, as a result of the Ministry of Environment investigating the health status of residents in areas surrounding 38 abandoned asbestos mines nationwide for six years starting from 2009, 1,068 out of 13,795 subjects (7.7%) were found to be suspected asbestos-related diseases.

[0009] Therefore, there is a need to suppress diseases caused by the inhalation of asbestos dust released into the air from rocks inside and around domestic abandoned asbestos mines by nearby residents. Prior art literature

[0010] Korean Patent Registration No. 10-1088474 The problem to be solved

[0011] The objective of the present invention, which aims to solve the aforementioned problems, is to provide a spraying device for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, thereby fundamentally preventing the dispersion of asbestos dust by spraying an eco-friendly epoxy resin onto the naturally occurring asbestos and fixing the asbestos dust to the eco-friendly epoxy resin.

[0012] In addition, another objective of the present invention is to provide a spraying device capable of transporting and mixing a composition for mixing an eco-friendly epoxy resin while moving freely around naturally occurring asbestos, and capable of spraying the mixed eco-friendly epoxy resin to apply a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos in order to prevent asbestos dust from scattering.

[0013] In addition, another objective of the present invention is to provide an asbestos dust prevention surface coating spraying device that can spray epoxy resin without gaps on the surface by having a lighting device that allows easy verification of the sprayed state of the eco-friendly epoxy resin inside a dark abandoned asbestos mine. means of solving the problem

[0014] The spraying device of the present invention, which applies a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion for solving the above problem, is characterized by comprising: a movable carriage formed to move around the naturally occurring asbestos by means of wheels; a first storage tank formed on the upper part of the movable carriage to receive the epoxy resin composition and discharge it at high pressure; a second storage tank formed on the upper part of the movable carriage to receive the curing agent composition and discharge it at high pressure; a mixing tank that receives the epoxy resin composition and the curing agent composition, mixes them through a stirrer to form a mixture, and discharges it at high pressure; and a spraying unit connected to the mixing tank to spray the mixture onto the surface of the naturally occurring asbestos.

[0015] In addition, the spray unit of the spray device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion according to the present invention is characterized by further comprising: a spray nozzle formed to be replaceable to prevent the mixture from curing and clogging, and a control valve formed to be able to control the flow rate of the mixture sprayed from the spray nozzle; a light source that irradiates light in the direction facing the spray nozzle to check the surface condition and spraying state of the naturally occurring asbestos; and a spray switch formed to select whether or not to spray the mixture through the spray nozzle.

[0016] In addition, the spraying unit of the spraying device for preventing asbestos dust dispersion according to the present invention, which mixes an eco-friendly epoxy resin composition and a curing agent composition and applies them to the surface of naturally occurring asbestos, is characterized by comprising: a plurality of spray pipes formed to receive the mixture; a driving plate coupled so that the plurality of spray pipes face different directions and capable of individually adjusting the angles of the plurality of spray pipes based on a center point; a spray nozzle formed on each of the plurality of spray pipes and formed to spray the mixture; a lighting device formed on each of the plurality of spray pipes that irradiates light in the direction in which the spray nozzle is facing to check the surface condition and spraying state of the naturally occurring asbestos; and a camera formed on each of the plurality of spray pipes that photographs the direction in which the spray nozzle is facing to determine the spraying state of the naturally occurring asbestos surface and controls the driving plate and the spray nozzle to automatically spray the mixture.

[0017] In addition, the mixing tank of the spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion according to the present invention is formed internally and further includes a leak prevention member that pressurizes the interface of the mixture to prevent the mixture contained therein from sloshing due to the movement of the movable cart.

[0018] In addition, the epoxy resin composition of the spraying device for applying to the surface of naturally occurring asbestos by mixing an eco-friendly epoxy resin composition and a curing agent composition to prevent asbestos dust scattering according to the present invention is characterized by comprising 50 to 70% epoxy resin, 25 to 35% diluent composed of bisphenol A diglycidyl ether which is a mineral cracking inhibitor, and 5 to 15% emulsifier composed of dinonylphenyl polyoxyethylene for composition viscosity modifier, and the curing agent composition is characterized by comprising 50 to 70% tetrahydrophthalic anhydride, 5 to 15% phthalic anhydride modified product, and 20 to 40% reaction product with C18-unsaturated fatty acid dimolecular polyethylene polyamine. Effects of the invention

[0019] As described above, according to the spray device of the present invention for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, the asbestos dust is solidified by the epoxy resin by spraying the eco-friendly epoxy resin onto the surface of naturally occurring asbestos, thereby having the effect of fundamentally preventing the dispersion of asbestos dust.

[0020] In addition, according to the spray device of the present invention for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, it is possible to transport and mix the composition for mixing the epoxy resin while moving freely around the naturally occurring asbestos, and to spray the mixed epoxy resin.

[0021] In addition, according to the spraying device of the present invention for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, the state of the sprayed epoxy resin can be easily confirmed inside a dark abandoned asbestos mine, thereby enabling the epoxy resin to be sprayed onto the surface without gaps. Brief explanation of the drawing

[0022] FIG. 1 is a side view showing the structure of a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a surface of naturally occurring asbestos to prevent asbestos dust dispersion according to the present invention. FIG. 2 is an enlarged view showing the spraying unit of a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a surface of naturally occurring asbestos to prevent asbestos dust dispersion according to the present invention. FIG. 3 is a configuration diagram showing the structure of a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a surface of naturally occurring asbestos to prevent asbestos dust dispersion according to the present invention. FIG. 4 is a front view showing a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a surface of naturally occurring asbestos to prevent asbestos dust dispersion in another embodiment of the present invention. Specific details for implementing the invention

[0023] The specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. Prior to this, if it is determined that a detailed description of the functions and configurations related to the present invention may unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0024] The present invention relates to a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion. More specifically, the invention relates to a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to the surface of naturally occurring asbestos to prevent asbestos dust dispersion while moving freely around the naturally occurring asbestos, thereby preventing health hazards to residents near abandoned asbestos mines.

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] FIG. 1 is a side view showing the structure of a spraying device that mixes an eco-friendly epoxy resin composition and a curing agent composition to prevent asbestos dust scattering according to the present invention and applies it to the surface of naturally occurring asbestos; FIG. 2 is an enlarged view showing a spraying unit (500) of a spraying device that mixes an eco-friendly epoxy resin composition and a curing agent composition to prevent asbestos dust scattering according to the present invention and applies it to the surface of naturally occurring asbestos; FIG. 3 is a configuration diagram showing the structure of a spraying device that mixes an eco-friendly epoxy resin composition and a curing agent composition to prevent asbestos dust scattering according to the present invention and applies it to the surface of naturally occurring asbestos.

[0027] As illustrated in FIGS. 1 to 3, the spraying device for preventing asbestos dust scattering according to the present invention, which mixes an eco-friendly epoxy resin composition and a curing agent composition and applies them to the surface of naturally occurring asbestos, is characterized by comprising: a movable cart (100) formed to move around the naturally occurring asbestos by means of a wheel (110); a first storage tank (200) formed on the upper part of the movable cart (100) to receive the epoxy resin composition and discharge it at high pressure; a second storage tank (300) formed on the upper part of the movable cart (100) to receive the curing agent composition and discharge it at high pressure; a mixing tank (400) that receives the epoxy resin composition and the curing agent composition, mixes them through a stirrer (410) to form a mixture, and discharges it at high pressure; and a spraying unit (500) connected to the mixing tank (400) to spray the mixture onto the surface of naturally occurring asbestos.

[0028] The mobile cart (100) is formed with a plurality of wheels (110) on its lower part so as to be able to move around naturally occurring asbestos, and is formed so as to be coupled with a first storage tank (200), a second storage tank (300), a mixing tank (400), and a spraying unit (500) on its upper part.

[0029] At this time, the movable cart (100) may have wheels (110) formed as wheels so as to be able to move along a railway rail formed in a closed asbestos mine, and in the case where there is no railway, it may be formed as tires so as to be able to move along the ground.

[0030] If necessary, the wheels (110) of the movable cart (100) may be formed as endless tracks so that they can move even over obstacles such as stones present around the naturally occurring asbestos.

[0031] Handles (120) are formed on the front and rear of the movable cart (100), respectively, so that a worker can manually move the movable cart (100) by pushing it, and if necessary, the movable cart (100) may be configured so that the wheels (110) are rotated by a separate engine or motor to control the driving direction and driving speed.

[0032] The first storage tank (200) stores an epoxy resin composition and is configured to supply the stored epoxy resin composition to the mixing tank (400) through the first supply pipe (220) via the first supply pump (210).

[0033] The second storage tank (300) stores a curing agent composition and is configured to supply the stored curing agent composition to the mixing tank (400) through the second supply pipe (320) via the second supply pump (310).

[0034] At this time, it is preferable that the first storage tank (200) and the second storage tank (300) each have lids formed so that the epoxy resin composition and the curing agent composition can be supplied from the outside, and a water level sensor is provided inside so that the capacity stored in the first storage tank (200) and the second storage tank (300) can be checked from the outside.

[0035] The mixing tank (400) is formed to receive an epoxy resin composition and a curing agent composition from the first storage tank (200) and the second storage tank (300), respectively, and is used to produce a mixture to be applied to the surface of naturally occurring asbestos by mixing the supplied epoxy resin composition and curing agent composition.

[0036] To this end, the mixing tank (400) is formed so that the first supply pipe (220) and the second supply pipe (320) can flow into it, and a supply valve (430) is formed to measure the flow rate supplied from the first supply pipe (220) and the second supply pipe (320) to measure the supply amount.

[0037] The supply valve (430) is formed inside the first supply pipe (220) and the second supply pipe (320), respectively, and by measuring the flow rate passing through, it is possible to measure the amount of epoxy resin composition and curing agent composition supplied to the mixing tank (400).

[0038] At this time, the timing of opening and closing the first supply pipe (220) and the second supply pipe (320) can be varied according to the mixing ratio of the epoxy resin composition and the curing agent composition, and the epoxy resin composition and the curing agent composition can be contained inside the mixing tank (400) by being automatically controlled by the supply valve (430).

[0039] The supply valve (430) can determine the volume of the mixture using a water level sensor formed inside the mixing tank (400), and can automatically receive the epoxy resin composition and the curing agent composition from the first storage tank (200) and the second storage tank (300) according to the volume of the mixture.

[0040] When the epoxy resin composition and the curing agent composition are supplied by the supply valve (430), they must be mixed by the stirrer (410) for a certain period of time, so it is desirable that the operation of the discharge pump (440) be kept stopped when the supply valve (430) is operated.

[0041] In addition, when the injection switch (540) of the injection unit (500) is pressed while the supply valve (430) is operating, it is desirable to indicate that the light (520) flashes and that the discharge pump (440) is currently not operating.

[0042] In addition, a propeller-shaped stirrer (410) is provided inside the mixing tank (400) to mix the epoxy resin composition and the curing agent composition introduced through the first supply pipe (220) and the second supply pipe (320) by stirring them together, and the stirrer (410) can mix the epoxy resin composition and the curing agent composition by rotating to produce a mixture.

[0043] At this time, the stirrer (410) may be formed to be rotated by a separate motor, and may also be configured to be rotated by a discharge pump (440) formed to discharge the mixture as needed.

[0044] A ladder (450) is provided on the outer surface of the mixing tank (400) to check the internal operating status of the mixing tank (400), the discharge pump (440), and the supply valve (430), and the discharge pump (440) and the supply valve (430) formed at a high position can be inspected or repaired through the ladder (450).

[0045] The discharge pump (440) is used to supply the mixture, which is mixed by stirring by the stirrer (410), to the spray unit (500) at high pressure through the discharge pipe (460), and the mixture discharged through the discharge pump (440) can be sprayed at high pressure by the spray unit (500) to be applied to the surface of the naturally occurring asbestos.

[0046] Additionally, it is characterized by further including a leak prevention member (420) formed inside the mixing tank (400) and pressurizing the interface of the mixture to prevent the mixture received by the movement of the moving cart (100) from sloshing.

[0047] Since the mixing tank (400) stores the epoxy resin composition and the curing agent composition in a mixed state, it can accommodate a larger amount of the mixture compared to the first storage tank (200) and the second storage tank (300).

[0048] The mixture contained in the mixing tank (400) may slosh due to vibrations or inertial energy generated as the moving cart (100) moves, and as the moving cart (100) is pushed by this sloshing, an accident may occur and the mixture may leak out.

[0049] The leak prevention plate (420) is formed as a circular plate with multiple through holes, and a stirrer (410) passes through the center and is used to prevent the mixture from sloshing by adhering to the interface of the mixture.

[0050] At this time, the interface refers to the surface of the mixture contained in the mixing tank (400), and the leak prevention device (420) is formed so as to float on the mixture and has a weight formed on its upper surface so that only a portion of it is submerged at the interface of the mixture.

[0051] Through this, when the mixture sways due to vibration or movement direction, the leak prevention device (420) pressurizes the interface, so only a portion of the mixture is discharged through the through hole of the leak prevention device (420), thereby preventing the mixture from swaying.

[0052] Additionally, the spray unit (500) is characterized by further including a spray nozzle (510) formed to be replaceable to prevent the mixture from hardening and clogging, which is formed to control the spraying direction and range of the mixture; a control valve (530) formed to control the flow rate of the mixture sprayed from the spray nozzle (510); a light (520) that irradiates light in the direction the spray nozzle (510) faces to check the surface condition and spraying condition of the naturally occurring asbestos; and a spray switch (540) formed to select whether or not to spray the mixture through the spray nozzle (510).

[0053] The spray unit (500) is formed in the shape of a gun so that it can be held by hand and is connected to a discharge pipe (460) so that the user can freely adjust the spray direction while holding the spray unit (500) by hand.

[0054] At this time, in order to easily spray the mixture from the spray unit (500), the spray unit (500) is provided with a spray switch (540) in the form of a trigger, and when the spray switch (540) is pulled, the mixture pressurized to high pressure by the discharge pump (440) can be sprayed.

[0055] The spray nozzle (510) is connected to the front of the spray unit (500) and controls the spray range, and increases the spray speed by the mixture pressurized to high pressure by the discharge pump (440), so that it can be applied over a long distance.

[0056] At this time, if the spray unit (500) is not used for a long time, the mixture containing the hardener may harden and the spray nozzle (510) may become clogged, so it is preferable that the spray nozzle (510) be configured to be detachable from the spray unit (500) by a screw method.

[0057] Since the spray nozzle (510) can be replaced using a screw method, even if the spray nozzle (510) becomes clogged due to not being used for a long time, work can be quickly resumed by replacing only the spray nozzle (510).

[0058] The control valve (530) is formed on the side of the spray unit (500) and is used to control the flow rate of the mixed liquid discharged through the spray nozzle (510), and is formed so that the opening and closing amount inside the spray unit (500) can be controlled according to the direction in which the operator rotates.

[0059] A light (520) is provided at the top of the spraying unit (500), and the operator can verify the spraying location by illuminating the location to be sprayed on the surface of naturally occurring asbestos with light through the light (520), and after the mixture is sprayed, check the coating state of the surface and spray again only on the areas where the mixture has not been coated.

[0060] Additionally, the mixture may include a fluorescent material that emits light when exposed to ultraviolet rays, and the lighting (520) is formed as an ultraviolet lamp, so that the coating state of the mixture sprayed onto the surface of naturally occurring asbestos can be identified by the presence or absence of the fluorescent material.

[0061] A fluorescent material that reacts to ultraviolet light may be formed in the epoxy resin composition or the curing agent composition, and may be configured to supply the fluorescent material to the mixing tank (400) through a separate storage tank as needed.

[0062] When a mixture is sprayed by a fluorescent material, the spraying area can be identified by the fluorescent material in a dark abandoned asbestos mine, and by irradiating ultraviolet light through the lighting (520) formed in the spraying unit (500), the spraying area and the fine spraying area can be identified through the fluorescent material.

[0063] In addition, the epoxy resin composition comprises 50 to 70% epoxy resin, 25 to 35% diluent composed of bisphenol A diglycidyl ether which is a mineral crack inhibitor, and 5 to 15% emulsifier composed of dinonylphenyl polyoxyethylene for viscosity modifier of the composition, and the curing agent composition comprises 50 to 70% tetrahydrophthalic anhydride, 5 to 15% phthalic anhydride modified product, and 20 to 40% reaction product with C18-unsaturated fatty acid dimolecular polyethylene polyamine.

[0064] The epoxy resin composition is stored in a first storage tank (200) in a state where a diluent and an emulsifier are mixed with the epoxy resin, and the diluent is used as a mineral crack inhibitor to prevent asbestos dust from scattering through cracks when the mixture is sprayed onto the surface of naturally occurring asbestos.

[0065] Additionally, the emulsifier is used to control the viscosity of the epoxy resin composition, thereby preventing the first supply pump (210) from malfunctioning due to high viscosity when it is pressurized and discharged from the first storage tank (200) by the first supply pump (210), and allowing it to be mixed stably in the mixing tank (400).

[0066] A curing agent composition is used to enable the epoxy resin composition to cure chemically within a short period of time.

[0067] To verify the mechanical properties of the above compositions, the epoxy resin composition and curing agent composition were separated by component and content, stirred, and then spray-coated onto a Teflon plate (PTFE) to a uniform thickness. The shear strength, tensile strength, and compressive strength were then measured. The results of this test, conducted to predict the surface strength and adhesion stability of rocks after surface coating in an abandoned asbestos mine, are listed in the table below.

[0068] At this time, the curing agent composition was formed based on the average value of each composition and was formulated by combining 60% tetrahydrophthalic anhydride, 10% phthalic anhydride modified product, and 30% reaction product with C18-unsaturated fatty acid dimolecular polyethylene polyamine.

[0069] The table below shows the combination ratios of the epoxy resin compositions divided into A and B.

[0070]

[0071] In addition, the table below shows the results of measuring mechanical properties (N / mm²) according to the mixing ratio of the epoxy resin composition and the curing agent composition. 2 It represented ).

[0072]

[0073] The results of measuring mechanical properties by setting the epoxy resin composition to 1 and varying the ratio of the curing agent to 1 / 4, 1 / 2, 1, and 2 times the epoxy resin composition are posted.

[0074] As a result of measuring mechanical properties such as shear strength, tensile strength, and compressive strength with different curing agent ratios for epoxy compositions A and B, it was confirmed that the mechanical strength was high on average when the mixing ratio of the epoxy resin composition to the curing agent composition was 1:0.25.

[0075] That is, the curing agent composition to be mixed into the epoxy resin composition should be mixed in only 1 / 4 of the epoxy resin composition, and if this is changed based on the curing agent composition, it becomes 1:4, and it is best to mix the epoxy resin composition in 4 times the amount when the curing agent composition is 1.

[0076] FIG. 4 is a front view showing a spray device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a naturally occurring asbestos surface to prevent asbestos dust scattering in another embodiment of the present invention.

[0077] As illustrated in FIG. 4, in another embodiment of the present invention, a spraying unit (500) of a spraying device for applying a mixture of an eco-friendly epoxy resin composition and a curing agent composition to a surface of naturally occurring asbestos to prevent asbestos dust dispersion comprises: a plurality of spray pipes (550) formed to receive the mixture; a driving plate (570) which is coupled so that the plurality of spray pipes (550) face different directions and can individually adjust the angles of the plurality of spray pipes (550) based on a center point; spray nozzles (510) formed on each of the plurality of spray pipes (550) to spray the mixture; lighting (520) formed on each of the plurality of spray pipes (550) to irradiate light in the direction in which the spray nozzles (510) face to check the surface condition and spraying condition of the naturally occurring asbestos; and a driving plate (570) and which is formed on each of the plurality of spray pipes (550) to photograph the direction in which the spray nozzles (510) face to determine the spraying condition of the surface of the naturally occurring asbestos. It is characterized by including a camera (560) that automatically sprays the mixture by controlling the spray nozzle (510).

[0078] Since abandoned asbestos mines are long, it is time-consuming to coat the entire surface using only manual labor; to resolve this, it is desirable to configure the system to spray simultaneously in multiple directions toward the surface of the abandoned asbestos mine.

[0079] To this end, a plurality of injection tubes (550) are connected to a driving plate (570) on the front of the movable carriage (100) so as to face in different directions, and the driving plate (570) is formed to be able to adjust the angles of each injection tube (550) until they overlap within a certain range.

[0080] Four spray tubes (550) can be formed at a constant angle, and after four are arranged at a 45-degree angle, the mixture can be sprayed in different directions toward the surface of the abandoned asbestos mine.

[0081] In addition, the four spray pipes (550) are rotated by the driving plate (570) to quickly apply the mixture to the inner surface of the abandoned asbestos mine, and if there are unsprayed areas among the applied areas, the driving plate (570) can adjust the angle of only the spray pipes (550) in the corresponding areas to spray the mixture.

[0082] A spray nozzle is formed at the edge of the spray pipe (550) to spray and diffuse the mixture, and the spray nozzle (510) can be attached to and detached from the spray pipe (550) by screw connection, so that if the mixture hardens and clogs the inside of the spray nozzle (510), only the spray nozzle (510) can be replaced to apply the mixture.

[0083] In addition, each injection pipe (550) is provided with a valve that opens and closes to spray or block the mixture, so that the mixture can be automatically sprayed from the injection pipe (550) by automatic control.

[0084] Around the spray nozzle (510), a light (520) is provided to illuminate the surface of naturally occurring asbestos to check the spray area and the sprayed state, and a camera (560) is provided to control the driving plate (570) and the spray pipe (550) by taking an image of the area illuminated by the light (520).

[0085] That is, through the lighting (520) and camera (560), the surface of the naturally occurring asbestos towards which the spray nozzle (510) is directed can be viewed as an image, and if the mixture is not sprayed in the captured image or if the surface of the abandoned asbestos mine is exposed among the sprayed areas, the angle of the spray pipe (550) can be adjusted through the driving plate (570) to spray the mixture.

[0086] Accordingly, when the mobile cart (100) moves inside the abandoned asbestos mine by autonomous driving or driving by a worker, the four spray pipes (550) can spray the mixture onto the surface of the abandoned asbestos mine by varying the angle from one direction to the other through the drive plate (570).

[0087] At this time, the four injection tubes (550) that are variable by the driving plate (570) can set the injection range at 90-degree intervals so as to spray the mixture in a 360-degree direction, and spray the mixture while varying the angle at 100-degree intervals to overlap the injection range with adjacent injection tubes (550).

[0088] Additionally, if necessary, the rear of the movable carriage (100) is additionally formed in the form of a spray gun so that a worker can manually spray the mixture, allowing the worker to verify the area determined to be normal by image distortion after automatic spraying and complete the application.

[0089] As described above, according to the spraying device of the present invention for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, the dispersion of asbestos dust can be fundamentally prevented by spraying the epoxy resin onto the surface of naturally occurring asbestos, thereby solidifying the asbestos dust by the epoxy resin. Furthermore, the composition for mixing the epoxy resin can be transported and mixed while moving freely around the naturally occurring asbestos, and the mixed epoxy resin can be sprayed. Additionally, the state of the sprayed epoxy resin can be easily confirmed even inside a dark abandoned asbestos mine, thereby providing the effect of spraying the epoxy resin onto the surface without gaps.

[0090] As described above, although the present invention has been explained with reference to preferred embodiments, those skilled in the art may implement the present invention with various modifications or variations without departing from the technical spirit and scope described in the claims of the present invention. Accordingly, the scope of the present invention should be interpreted by the claims described to include such many variations. Explanation of the symbols

[0091] 100 : Mobile cart 110 : Wheel 120 : Handle 200 : 1st storage tank 210: 1st supply pump 220: 1st supply pipe 300 : 2nd storage tank 310 : 2nd supply pump 320 : Second supply pipe 400 : Mixing tank 410 : Stirrer 420 : Leakage stopper 430 : Supply valve 440 : Discharge pump 450 : Ladder 460 : Discharge pipe 500: Spray unit 510: Spray nozzle 520 : Lighting 530 : Control valve 540 : Spray switch 550 : Spray pipe 560 : Camera 570 : Drive plate

Claims

Claim 1 A mobile cart formed to move around naturally occurring asbestos by means of wheels; a first storage tank formed on the upper part of the mobile cart to receive an epoxy resin composition and discharge it at high pressure; a second storage tank formed on the upper part of the mobile cart to receive a curing agent composition and discharge it at high pressure; a mixing tank that receives the epoxy resin composition and the curing agent composition, mixes them through a stirrer to form a mixture, and discharges it at high pressure; and a spraying unit connected to the mixing tank to spray the mixture onto the surface of naturally occurring asbestos; wherein the epoxy resin composition comprises 50 to 70% epoxy resin, 25 to 35% a diluent composed of bisphenol A diglycidyl ether, which is a mineral cracking inhibitor, and 5 to 15% an emulsifier composed of dinonylphenyl polyoxyethylene for composition viscosity modifier, and the curing agent composition comprises 50 to 70% tetrahydrophthalic anhydride and 5 to A spray device for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying the mixture to the surface of naturally occurring asbestos, characterized by comprising 15% and 20 to 40% of a reaction product with a C18-unsaturated fatty acid dimolecular polyethylene polyamine. Claim 2 A spraying device for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, characterized in that, in claim 1, the spraying unit is formed to control the spraying direction and range of the mixture and is formed to be replaceable to prevent the mixture from hardening and clogging; a control valve formed to control the flow rate of the mixture sprayed from the spraying nozzle; lighting that irradiates light in the direction facing the spraying nozzle to check the surface condition and spraying state of the naturally occurring asbestos; and a spray switch formed to select whether or not to spray the mixture through the spraying nozzle. Claim 3 A spraying device for preventing asbestos dust dispersion, comprising: a plurality of spray pipes formed to receive the mixture in the spraying unit; a driving plate coupled so that the plurality of spray pipes face different directions and capable of individually adjusting the angles of the plurality of spray pipes based on a center point; a spray nozzle formed in each of the plurality of spray pipes and formed to spray the mixture; a lighting unit formed in each of the plurality of spray pipes and irradiating light in the direction in which the spray nozzle faces to check the surface condition and spraying condition of the naturally occurring asbestos; and a camera formed in each of the plurality of spray pipes that photographs the direction in which the spray nozzle faces to determine the spraying condition of the naturally occurring asbestos surface and controls the driving plate and the spray nozzle to automatically spray the mixture. Claim 4 A spraying device for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to a surface of naturally occurring asbestos, characterized in that, in claim 2 or 3, the mixture contains a fluorescent material that emits light when exposed to ultraviolet rays, and the illumination is formed by an ultraviolet lamp, so that the coating state of the mixture sprayed onto the surface of naturally occurring asbestos can be identified by the presence or absence of the fluorescent material. Claim 5 A spray device for preventing asbestos dust dispersion by mixing an eco-friendly epoxy resin composition and a curing agent composition and applying them to the surface of naturally occurring asbestos, characterized in that, in claim 1, the mixing tank further comprises a leak prevention member formed inside and pressurizing the interface of the mixture to prevent the mixture received by the movement of the movable cart from sloshing. Claim 6 delete

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