Spraying equipment for fire retardant coating construction and use method

Abstract

The present invention relates to the technical field of fire retardant coating construction, and discloses a spraying device for fire retardant coating construction, including a base, a vertical beam fixedly connected to the top of the base, an electric control cabinet fixedly connected to one side of the vertical beam, two guide rods fixedly connected to the interior of the vertical beam, a lifting frame slidably connected between the two guide rods through a plurality of slides, and a lifting assembly driving the lifting frame to move up and down along the guide rods is provided in the vertical beam. The present invention sprays the fire retardant coating at a specified distance from the inner wall of the tunnel by a spraying assembly, and then uses a lifting assembly to slowly move the spraying assembly, thereby achieving uniform spraying operation, and uses a blocking cover to wrap and shield the spraying assembly, and at the same time, the spraying treatment assembly arranged outside the blocking cover completes the dust cleaning operation before spraying the inner wall surface of the tunnel, and the surface of the fire retardant coating after spraying is also accelerated by warm wind to circulate air, effectively improving the drying rate of the fire retardant coating.

Description

Technical Field

[0001] The invention relates to the technical field of fire retardant coating construction, and in particular to a spraying device for fire retardant coating construction and a use method thereof. Background Art

[0002] A tunnel is a relatively closed space. Once a fire occurs, the situation will be extremely critical. The high temperature, thick smoke and toxic gases generated by the fire are difficult to discharge quickly and will accumulate in the tunnel. The high temperature may cause damage to the tunnel structure and cause the tunnel to collapse; the thick smoke and toxic gases will affect the escape and rescue of personnel. For example, in some long tunnels or tunnels with heavy traffic, there are dense vehicles. If a fire occurs, the fire will easily spread, causing serious casualties and property losses.

[0003] Fire retardant coating can effectively block the transfer of heat. It can form an insulating layer at high temperatures and slow down the conduction of heat to the concrete structure of the tunnel inner wall. Therefore, fire prevention measures in tunnels are crucial.

[0004] At present, there are still the following problems in the construction of fire retardant coatings on the inner wall of tunnels:

[0005] 1. When applying fire retardant coating inside the tunnel, workers usually set up a ladder, then stand on the ladder and use a roller brush to roll the fire retardant coating on the inner wall of the tunnel. This is not only inefficient, but also the thickness of the manually rolled paint surface is uneven. If the coating thickness is too thin, the expected fire protection duration and heat insulation effect cannot be achieved; if the thickness is too thick, it will cause a waste of paint;

[0006] 2. During spraying, the atomized paint flows with the airflow direction, part of it adheres to the inner wall of the tunnel, and part of it is scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but also easily adheres to the dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which is very easy to pollute it and affect the spraying effect of the fire retardant paint;

[0007] 3. When spraying fire retardant coating, the cleanliness of the inner wall surface of the tunnel also affects the adhesion effect of the fire retardant coating. Therefore, the pretreatment work before spraying and the accelerated drying after spraying are also urgent problems that need to be solved. Summary of the invention

[0008] Technical issues solved

[0009] In view of the deficiencies in the prior art, the present invention provides a spraying device and a method for using fire retardant coatings, which are mainly used to solve the problem that when fire retardant coatings are applied inside a tunnel, workers usually set up a ladder, then stand on the ladder and use a roller brush to roll the fire retardant coatings on the inner wall of the tunnel, which is not only inefficient, but also has different thicknesses of the manually rolled paint surface. If the coating thickness is too thin, the expected fire protection time and heat insulation effect cannot be achieved; if the thickness is too thick, the coating is wasted; during spraying, the atomized coating produced flows in the direction of the airflow, a part of it adheres to the inner wall of the tunnel, and a part of it is scattered in the air. The atomized coating scattered in the air not only pollutes the spraying equipment, but is also easily attached to dust in the air, and then falls on the inner wall of the tunnel after the fire retardant coating is sprayed, which is very likely to pollute it and affect the spraying effect of the fire retardant coating; and during the spraying of the fire retardant coating, the cleanliness of the inner wall surface of the tunnel also affects the adhesion effect of the fire retardant coating, so the need to solve the pretreatment work before spraying and the accelerated drying after spraying are also urgent problems to be solved.

[0010] Technical Solution

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A spraying device for fire retardant coating construction comprises a base, the top of the base is fixedly connected to a vertical beam, one side of the vertical beam is fixedly connected to an electric control cabinet, two guide rods are fixedly connected inside the vertical beam, a lifting frame is slidably connected between the two guide rods via a plurality of slides, a lifting assembly is provided in the vertical beam for driving the lifting frame to move up and down along the guide rods, one side of the lifting frame is connected to an outer frame via an angle adjustment assembly, a spray assembly for pneumatically spraying fire retardant coating is provided on an inner wall of one side of the outer frame, two groups of inner rails are fixedly connected to the inner walls on both sides of the outer frame, a blocking cover for wrapping and shielding the spray assembly is slidably connected between the multiple groups of inner rails via slides, a spray processing assembly for dual processing of the spray assembly before and after spraying is provided on the outside of the blocking cover, and a paint cleaning assembly for cleaning and collecting residual material generated during the spraying operation of the spray assembly is provided inside the blocking cover.

[0013] Furthermore, the spray assembly includes at least three spray gun support frames, which are all fixedly connected to the inner wall of one side of the outer frame, and the ends of the three spray gun support frames pass through the blocking cover and are fixedly connected to the spray gun heads. A paint box is fixedly connected to one side of the base, and a discharge port is opened on one side of the paint box. A paint hose is fixedly connected in the discharge port, and the paint hose is connected to the paint feed ports of the three spray gun heads. An air compressor and an air circuit distributor are fixedly connected to one side of the base, and one end of the air outlet of the air compressor is connected to the air circuit distributor, and the other end of the air circuit distributor is fixed to the top air hole of the paint box through a pressure pipe and is connected to the inside of the paint box through the air hole. The air circuit distributor is connected to the air ports of the three spray gun heads respectively through two groups of air intake hoses, and an electromagnetic valve for controlling the gas flow inside the air intake hose is provided between the air intake hoses, and a fire-retardant paint scattering mechanism is provided inside the paint box.

[0014] On the basis of the above scheme, the fire-retardant coating breaking mechanism includes an end cover, which is fixedly connected to the top opening of the coating box, the bottom of the end cover is rotatably connected to a stirring frame through a bearing, the top of the end cover is fixedly connected to a stirring motor, one end of the output shaft of the stirring motor is fixed to the top of the stirring frame through a coupling, and a spherical filter for filtering the fire-retardant coating is provided on the inner side of the discharge port and inside the coating box.

[0015] As a further solution of the present invention, the spray processing assembly includes two positioning track sleeves, the two positioning track sleeves are fixedly connected to the outer walls of both sides of the blocking cover, a rotating ring is rotatably connected between the two positioning track sleeves, a hot air hood is fixedly connected to one side of the rotating ring and located at the upper notch position, a heating wire is arranged in the hot air hood, an air supply duct is connected to one side of the hot air hood, a dust suction hood is fixedly connected to one side of the rotating ring and located at the lower notch position, a dust suction hood is connected to one side of the dust suction duct, a vortex air pump and an air pump are fixedly connected to the top outer wall of the blocking cover An air filter, and one end of the air inlet of the vortex air pump is connected to one end of the air filter, the other end of the air filter is connected to the dust suction duct through a dust suction hose, the air filter consists of an outer cover and a built-in conical filter, the built-in conical filter is detachably installed inside the outer cover and filters the air passing through the air filter, one end of the air outlet of the vortex air pump is fixedly connected to an air supply hose, and one end of the air supply hose is connected to the air supply duct, and a rotating drive mechanism for driving the dust suction hood and the hot air hood to switch work positions is provided at the bottom of the blocking hood.

[0016] Furthermore, the rotation drive mechanism includes a drive motor, which is fixedly connected to the bottom outer wall of the blocking cover. One end of the output shaft of the drive motor is fixedly connected to a rotating gear. The circumferential inner wall of the rotating ring is provided with a plurality of internal tooth grooves distributed at equal distances, and the internal tooth grooves are meshed with the rotating gear.

[0017] Based on the above-mentioned scheme, the paint cleaning assembly includes a cleaning component for cleaning the residual material at the nozzle end of the three spray gun heads and a collecting component for collecting the residual paint inside the blocking cover. A telescopic electric push rod is fixedly connected to the inner wall of one side of the outer frame, and one end of the telescopic electric push rod is fixed to the top outer wall of the blocking cover.

[0018] As a further solution of the present invention, the cleaning component includes a protective cover, which is fixedly connected to the top inner wall of the blocking cover, and both sides of the blocking cover are provided with avoidance vertical grooves, and a mounting cover is provided between the two avoidance vertical grooves, and the mounting cover is a hollow structure with an opening at the top, and a sponge strip is detachably installed inside the mounting cover, and the sponge strip can be inserted into the protective cover, and both ends of the mounting cover are rotatably connected to support plates, and the support plates form a blockage for the avoidance vertical grooves, and both ends of the mounting cover are provided with torsion springs, and the two ends of the torsion springs are respectively connected to The mounting cover and the support plate are fixed, one end of one of the mounting covers is fixedly connected with a flip gear, one side of the blocking cover is fixedly connected with a flip rack that can mesh with the flip gear, both side outer walls of the blocking cover are fixedly connected with lifting electric push rods, and one end of the lifting electric push rods is fixed to the support plate, a avoidance groove is provided on the top of the protective cover, a scraper is inserted in the avoidance groove, and the scraper is fixed to three spray gun support frames, an oblique angle is provided on one side of the scraper, and the top of the scraper fits with the top inner wall of the blocking cover.

[0019] Furthermore, the collecting component includes two lower guide plates, which are fixedly connected to the bottom inner wall of the blocking cover. A hanging groove is provided at the bottom of the blocking cover and between the two lower guide plates. A collecting box is detachably installed in the hanging groove. An upper guide plate is fixedly connected to the top inner wall of the blocking cover, and the lowest point of the upper guide plate does not exceed the highest point of the lower guide plate near the opening of the blocking cover.

[0020] On the basis of the above scheme, the angle adjustment component includes a fixed shaft, which is fixedly connected to one side of the outer frame, the fixed shaft is hinged to the lifting frame, two angle electric push rods are hinged to one side of the lifting frame, and one end of the two angle electric push rods are hinged to the outer frame, both ends of the fixed shaft are fixedly connected to a rotating disk, a plurality of equally distributed card slots are opened on the circumference of the rotating disk, one side of the lifting frame is fixedly connected to two electric control locks, and the electric control lock tongue passes through the lifting frame and can be engaged with the card slot, the lifting component includes an upper sprocket, the upper sprocket is rotatably connected to the top outer wall of the vertical beam through a vertical bearing seat, a lifting reduction motor is fixedly connected to the bottom inner wall of the base, one end of the output shaft of the lifting reduction motor is fixedly connected to the lower sprocket, and the lower sprocket and the upper sprocket are connected by chain transmission, the chain and the lifting frame are fixed by connecting screws, a plurality of counterweights are provided on one side of the base, and power wheels are provided at the four corners of the bottom of the base.

[0021] A method for using a spraying device for fire retardant coating construction comprises the following steps:

[0022] S1: First, the lifting and lowering reduction motor is started. The rotation of the lifting and lowering reduction motor drives the lower sprocket to rotate, and the upper sprocket is driven to rotate synchronously through the chain. The chain and the lifting frame are fixed by connecting screws. Therefore, the chain can drive the lifting frame to move upward along the guide rod when it moves. By starting two angle electric push rods at the same time, the extension or shortening of the two angle electric push rods can make the outer frame flip downward around the fixed axis, so that the spraying angle of the spraying component can be adjusted, so that the spraying component can adapt to the curvature of the inner wall of the tunnel;

[0023] S2: Then add fire retardant paint into the paint box, and then start the stirring motor. The stirring motor rotates through the stirring rack to effectively disperse the fire retardant paint in the paint box to avoid the fire retardant paint from caking and affecting the spraying effect. Then start the air compressor. The air compressor rotates to generate gas. Part of the gas enters the paint box from the pressure pipe through the gas distributor, thereby increasing the pressure in the paint box, and the fire retardant paint inside is sent to the spray gun head along the paint hose under pressure. At this time, the fire retardant paint entering the paint hose can be effectively filtered through the spherical filter to prevent caking and large particles from entering. At the same time, part of the gas enters the spray gun head from the air inlet hose through the gas distributor and drives the fire retardant paint to be sprayed out from the nozzle of the spray gun head;

[0024] S3: At this time, the blocking cover can wrap and block the spraying component, effectively preventing the atomized paint generated during spraying from flowing in the direction of the airflow, with part of it adhering to the inner wall of the tunnel and part of it scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but also easily adheres to the dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which is very easy to pollute it and affect the spraying effect of the fire retardant paint. In addition, since part of the atomized paint adheres to the inner wall of the blocking cover, an upper guide plate is set to guide the atomized paint that adheres and accumulates to drip onto the lower guide plate, and under the action of the gravity of the paint body, it flows along the lower guide plate into the collection box for collection;

[0025] S4: At this time, the spraying assembly is slowly moved downward by the lifting assembly, so as to achieve uniform spraying operation. At the same time, the vortex air pump is started, and the vortex air pump rotates to generate suction at the air inlet and blow out gas from the air outlet. Since the dust hood is connected to the air inlet of the vortex air pump through the dust suction pipe, the dust suction hose and the air filter, the dust hood generates suction and absorbs and cleans the dust on the inner wall of the tunnel before spraying, and the absorbed dust can be blocked and filtered by the air filter. Since the hot air hood is connected to the air outlet of the vortex air pump through the air supply pipe and the air supply hose, and since a heating wire is arranged inside the hot air hood, the gas blown out of the air outlet will be heated in the hot air hood and blown out, thereby realizing the auxiliary drying treatment of the fire retardant coating after spraying;

[0026] S5: When spraying from bottom to top, it is only necessary to start the drive motor. The drive motor rotates to drive the rotating gear to rotate along the inner tooth groove of the rotating ring, so that the rotating ring drives the hot air hood and the dust hood to rotate 180° counterclockwise through the two positioning track sleeves, thereby completing the work station switching. At the same time, since the dust suction hose and the air supply hose are both rubber hoses, the dust suction hose and the air supply hose can be bent without affecting normal use;

[0027] S6: When it is necessary to clean the residual materials at the nozzles at the ends of the three spray gun heads, first start the telescopic electric push rod, which is extended to drive the blocking cover to move outward along the inner track set on the inner wall of the outer frame. Since the scraper is fixed to the three spray gun support frames, the scraper is separated from the protective cover and the sponge strip until the blocking cover moves to a suitable position. At this time, the two lifting electric push rods are started at the same time. The lifting electric push rod is extended to drive the installation cover to move downward through the support plate until the flip gear is engaged with the flip rack. At this time, the flip gear rotates counterclockwise along the flip rack and drives the installation cover and the sponge strip to rotate counterclockwise to 90°. At this time, the sponge strip is facing the nozzle of the spray gun head. Then the telescopic electric push rod is shortened to make the blocking cover drive the installation cover and the sponge strip to move inward and make the sponge strip contact with the nozzle of the spray gun head and deform under compression force, so that the droplets generated from the nozzle of the spray gun head are adsorbed by the sponge strip;

[0028] S7: Then the telescopic electric push rod is extended to make the blocking cover drive the installation cover and the sponge strip to move outward to a suitable position, and then the lifting electric push rod is shortened to drive the installation cover to move upward through the support plate. At this time, the installation cover is reversely rotated and reset by the flip gear and the flip rack. Because the gravity of the installation cover is much greater than the sponge strip and the torsion of the torsion spring, the sponge strip faces upward until the lifting electric push rod is shortened and reset, and at this time the sponge strip is inserted into the protective cover;

[0029] S8: Then the telescopic electric push rod is shortened so that the blocking cover drives the installation cover and the sponge strip to move inward and reset. At this time, the scraper is reinserted into the protective cover and seals the protective cover. During the insertion process, the scraper contacts and squeezes the sponge strip through the bevel, so that the fire retardant coating attached to the surface of the sponge strip is scraped off into the angular cavity formed by the bevel and the inner wall of the top of the blocking cover. When the protective cover is sealed, the fire retardant coating in the angular cavity drips into the collection box under the action of gravity, so that the sponge strip is sealed and wrapped when it is not working, so as to avoid the contamination of the atomized coating generated by the spraying component when the sponge strip is working and the deep cleaning of the sponge strip.

[0030] Beneficial Effects

[0031] Compared with the prior art, the present invention provides a spraying device for fire retardant coating construction, which has the following beneficial effects:

[0032] 1. The present invention uses a spraying assembly to spray the fire retardant coating at a specified distance from the inner wall of the tunnel, and then uses a lifting assembly to slowly move the spraying assembly, so as to achieve uniform spraying operation, effectively solving the problem that workers set up a ladder, then stand on the ladder and use a roller brush to roll the fire retardant coating on the inner wall of the tunnel, which is not only inefficient but also has uneven thickness of the manually rolled paint surface.

[0033] 2. The present invention adopts a blocking cover to wrap and shield the spraying component, which effectively avoids the problem that the atomized paint produced during spraying flows in the direction of the airflow, part of which adheres to the inner wall of the tunnel and part of which is scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but also easily adheres to the dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which easily pollutes it and affects the spraying effect of the fire retardant paint.

[0034] 3. The present invention completes the dust cleaning operation on the inner wall surface of the tunnel before spraying through the spraying processing component arranged on the outside of the blocking cover, and the surface of the fire-retardant coating after spraying is also accelerated by warm wind to circulate air, effectively improving the drying rate of the fire-retardant coating.

[0035] 4. The present invention adopts a rotary drive mechanism, so that when the spraying is changed from top to bottom to bottom to top, the two stations of cleaning and drying can be switched accordingly, which greatly improves the work efficiency.

[0036] 5. The present invention adjusts the spraying angle of the spraying component by means of an angle adjustment component, has wider applicability, and can achieve avoidance of the spraying component and the inner wall of the tunnel to a certain extent.

[0037] 6. The present invention can clean the residual materials at the nozzles at the ends of the three spray gun heads and collect the residual materials of the internal paint of the blocking cover through the paint cleaning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the front three-dimensional structure of a spraying device for fire retardant coating construction proposed by the present invention;

[0039] Figure 2 A schematic diagram of the rear three-dimensional structure of a spraying device for fire retardant coating construction proposed by the present invention;

[0040] Figure 3 A schematic diagram of the structure of a lifting assembly of a spraying device for fire retardant coating construction proposed by the present invention;

[0041] Figure 4 A spraying device for fire retardant coating construction proposed by the present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0042] Figure 5 A spraying device for fire retardant coating construction proposed by the present invention Figure 1 A schematic diagram of a local enlarged structure;

[0043] Figure 6 A spraying device for fire retardant coating construction proposed by the present invention Figure 5 Schematic diagram of the local decomposition structure;

[0044] Figure 7 A spraying device for fire retardant coating construction proposed by the present invention Figure 5 A schematic diagram of a local enlarged structure;

[0045] Figure 8 A schematic diagram of the structure of a spraying assembly of a spraying device for fire retardant coating construction proposed by the present invention;

[0046] Fig. 9 A schematic cross-sectional view of a coating box of a spraying device for fire retardant coating construction proposed by the present invention;

[0047] Fig.10 A schematic diagram of the structure of a spraying processing component of a spraying equipment for fire retardant coating construction proposed by the present invention;

[0048] Fig.11A schematic cross-sectional view of an air filter of a spraying device for fire retardant coating construction proposed by the present invention;

[0049] Fig.12 A schematic diagram of the positional relationship between a paint cleaning component and a blocking cover of a spraying device for fire retardant paint construction proposed by the present invention;

[0050] Fig.13 A schematic cross-sectional view of a blocking cover of a spraying device for fire retardant coating construction proposed by the present invention;

[0051] Fig.14 The present invention provides a spraying device for fire retardant coating construction Fig.13 Schematic diagram of the local decomposition structure;

[0052] Fig.15 A spraying device for fire retardant coating construction proposed by the present invention Fig.14 A schematic diagram of the enlarged structure of part B;

[0053] Fig.16 A schematic diagram of the positional relationship between a spraying component and a paint cleaning component of a spraying device for fire retardant paint construction proposed by the present invention;

[0054] Fig.17 A schematic diagram of the cleaning position state of a paint cleaning component of a spraying device for fire retardant paint construction proposed by the present invention.

[0055] In the figure: 1, lifting assembly; 101, chain; 102, guide rod; 103, upper sprocket; 104, lifting reduction motor; 105, lower sprocket; 2, vertical beam; 3, base; 4, power wheel; 5, blocking cover; 6, spraying assembly; 601, spray gun head; 602, paint hose; 603, paint box; 604, pressure pipe; 605, air distributor; 606, air compressor; 607, air intake hose; 608, spray gun head; 609, spray gun head; 610, spray gun head; 611, spray gun head; 612, spray gun head; 613, spray gun head; 614, spray gun head; 615, spray gun head; 616, spray gun head; 617, spray gun head; 618, spray gun head; 619, spray gun head; 620, spray gun head; 621, spray gun head; 622, spray gun head; 623, spray gun head; 624, spray gun head; 625, spray gun head; 626, spray gun head; 627, spray gun head; 628, spray gun head; 629, spray gun head; 630, spray gun head; 631, spray gun head; 632, spray gun head; 633, spray gun head; 634, spray gun head; 635, spray gun head; 636, spray gun head; 637, spray gun head; 638, spray gun head; 639, spray gun head; 640, spray gun head; 641, spray gun head; 642, spray gun head; 643, spray gun head; 644, spray gun head; 645, spray gun head; 646, spray gun head; 647, spray gun head; 648, spray gun 08, inner rail; 609, spray gun support frame; 610, telescopic electric push rod; 611, end cover; 612, stirring frame; 613, ball filter; 614, stirring motor; 7, spray treatment assembly; 701, air filter; 702, vortex air pump; 703, hot air hood; 704, air supply duct; 705, dust hood; 706, inner tooth groove; 707, rotating gear; 708, dust duct; 7 09, drive motor; 710, positioning track sleeve; 711, dust suction hose; 712, air supply hose; 713, outer cover; 714, built-in cone filter; 715, rotating ring; 8, lifting frame; 9, outer frame; 10, angle adjustment component; 1001, electric lock; 1002, angle electric push rod; 1003, fixed shaft; 1004, slot; 1005, rotating disk; 11, paint cleaning component; 11 01. Sponge strip; 1102. Protective cover; 1103. Mounting cover; 1104. Upper guide plate; 1105. Avoidance vertical groove; 1106. Lower guide plate; 1107. Collecting box; 1108. Support plate; 1109. Flip rack; 1110. Lifting electric push rod; 1111. Scraper; 1112. Bevel; 1113. Flip gear; 1114. Torsion spring; 12. Electric control cabinet; 13. Counterweight. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] Reference Figure 1-Figure 17A spraying device for fire retardant coating construction includes a base 3, a vertical beam 2 is fixed to the top of the base 3 by bolts, an electric control cabinet 12 is fixed to one side of the vertical beam 2 by bolts, two guide rods 102 are fixed to the inside of the vertical beam 2 by bolts, a lifting frame 8 is slidably connected between the two guide rods 102 by a plurality of slides, a lifting component 1 for driving the lifting frame 8 to move up and down along the guide rods 102 is provided in the vertical beam 2, one side of the lifting frame 8 is connected to an outer frame 9 by an angle adjustment component 10, a spraying component 6 for air pressure spraying of fire retardant coating is provided on the inner wall of one side of the outer frame 9, and two sets of inner rails 608 are fixed to the inner walls of both sides of the outer frame 9 by bolts , a blocking cover 5 for wrapping and shielding the spraying assembly 6 is slidably connected between the multiple groups of inner rails 608 through a slide, a spraying treatment assembly 7 for double treatment of the spraying assembly 6 before and after spraying is arranged on the outside of the blocking cover 5, and a paint cleaning assembly 11 for cleaning and collecting the residual material generated during the spraying operation of the spraying assembly 6 is arranged inside the blocking cover 5. When applying fire retardant paint inside the tunnel, workers usually set up a climbing ladder, then stand on the climbing ladder and use a roller brush to roll the fire retardant paint on the inner wall of the tunnel, which is not only inefficient, but also the thickness of the manually rolled paint surface is uneven. If the coating thickness is too thin, the expected fire prevention time and heat insulation effect cannot be achieved;If the thickness is too thick, it will cause waste of paint. Therefore, spraying equipment is used for automatic spraying. When in use, the fire retardant paint is first sprayed at a specified distance from the inner wall of the tunnel through the spraying component 6, and then the lifting component 1 is used to slowly move the spraying component 6 to achieve uniform spraying operation. During spraying, the atomized paint flows with the direction of the airflow, part of it adheres to the inner wall of the tunnel, and part of it is scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but also easily adheres to the dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which is very easy to pollute it and affect the spraying effect of the fire retardant paint. Therefore, a blocking cover 5 is used to block the spraying component 6. The fire retardant coating is wrapped with a piece 6, which greatly reduces the occurrence of the above situation. When the fire retardant coating is sprayed, the cleanliness of the inner wall surface of the tunnel also affects the adhesion effect of the fire retardant coating. Therefore, the spray processing component 7 arranged outside the blocking cover 5 is used to complete the dust cleaning operation on the inner wall surface of the tunnel before spraying, and the surface of the fire retardant coating after spraying is also accelerated by warm wind to effectively improve the drying rate of the fire retardant coating. Since the dust cleaning operation must be carried out before the spraying operation, only the top-down spraying operation can be adopted, and the spraying from the bottom to the top needs to be stopped, which wastes working time. Therefore, a rotary drive mechanism is adopted, so that when the transition from top-down spraying to bottom-up spraying is made, the two stations of dust cleaning and drying can be switched accordingly, which greatly improves the working efficiency. The rate, and because the position of the tunnel near the top is an inner arc type, the spraying angle of the spraying assembly 6 can be adjusted by the angle adjustment component 10, and the applicability is wider. At the same time, the residual material at the nozzle end of the spray gun of the spraying assembly 6 can be cleaned by the paint cleaning component 11, and the residual paint inside the blocking cover 5 can be collected. The lifting assembly 1 includes an upper sprocket 103, and the upper sprocket 103 is rotatably connected to the top outer wall of the vertical beam 2 through a vertical bearing seat. The bottom inner wall of the base 3 is fixed with a lifting reduction motor 104 by bolts, and one end of the output shaft of the lifting reduction motor 104 is keyed to a lower sprocket 105, and the lower sprocket 105 is connected to the upper sprocket 103 through a chain 101. The chain 1 01 is fixed to the lifting frame 8 by connecting screws. When in use, by starting the lifting reduction motor 104, the lifting reduction motor 104 rotates to drive the lower sprocket 105 to rotate, and drives the upper sprocket 103 to rotate synchronously through the chain 101, and the chain 101 and the lifting frame 8 are fixed by connecting screws, so the chain 101 can drive the lifting frame 8 to move up or down along the guide rod 102 when moving. A plurality of counterweight blocks 13 are provided on one side of the base 3, and the center of gravity of the spraying equipment can be kept stable by the counterweight blocks 13. The four corners of the bottom of the base 3 are provided with power wheels 4, which are composed of a hub motor and a hub, so the left and right movement of the spraying equipment can be realized by rotating the hub motor. ;

[0060] In order to achieve uniform spraying operation, the spraying assembly 6 in the present invention includes at least three spray gun support frames 609, and the three spray gun support frames 609 are fixed to the inner wall of one side of the outer frame 9 by bolts. The ends of the three spray gun support frames 609 pass through the blocking cover 5 and are fixed with spray gun heads 601 by bolts. A paint box 603 is fixed to one side of the base 3 by bolts, and a discharge port is opened on one side of the paint box 603. A paint hose 602 is fixedly connected to the discharge port, and the paint hose 602 is connected to the paint feed ports of the three spray gun heads 601. An air compressor 606 and an air distributor 606 are fixed to one side of the base 3 by bolts. 05, and one end of the air outlet of the air compressor 606 is connected to the air distributor 605, the other end of the air distributor 605 is fixed to the top air hole of the paint box 603 through the pressure pipe 604 and communicated with the inside of the paint box 603 through the air hole, the air distributor 605 is respectively connected to the air ports of the three spray gun heads 601 through two groups of air intake hoses 607, and a solenoid valve for controlling the gas flow inside the air intake hoses 607 is provided between the air intake hoses 607, and a fire retardant paint scattering mechanism is provided inside the paint box 603, and the fire retardant paint scattering mechanism includes an end cover 611, and the end cover 611 is fixed to the top opening of the paint box 603 by bolts At the outlet, the bottom of the end cover 611 is rotatably connected to the stirring frame 612 through a bearing, and the top of the end cover 611 is fixed with a stirring motor 614 through bolts. One end of the output shaft of the stirring motor 614 is fixed to the top of the stirring frame 612 through a coupling. A spherical filter 613 for filtering the fire retardant paint is provided inside the paint box 603 and inside the paint box 603. When in use, the fire retardant paint is first added to the paint box 603, and then the stirring motor 614 is started. The stirring motor 614 rotates through the stirring frame 612 to effectively disperse the fire retardant paint in the paint box 603, so as to avoid the fire retardant paint from agglomerating and affecting the spraying effect. The air compressor 606 rotates to generate gas, and part of the gas enters the paint box 603 from the pressure pipe 604 through the gas distributor 605, thereby increasing the pressure in the paint box 603 and causing the internal fire retardant paint to be sent to the spray gun head 601 along the paint hose 602 under pressure. At this time, the fire retardant paint entering the paint hose 602 can be effectively filtered through the spherical filter 613 to prevent agglomerates and large particles from entering. At the same time, part of the gas enters the spray gun head 601 from the air inlet hose 607 through the gas distributor 605 and drives the fire retardant paint to be sprayed out from the nozzle of the spray gun head 601.

[0061] In order to solve the technical problems of pretreatment work before spraying and accelerated drying after spraying, the spraying treatment assembly 7 in the present invention includes two positioning track sleeves 710, and the two positioning track sleeves 710 are fixed to the outer walls of the two sides of the blocking cover 5 by bolts. A rotating ring 715 is rotatably connected between the two positioning track sleeves 710, and a hot air cover 703 is fixed by bolts on one side of the rotating ring 715 and at the upper notch position. A heating wire is arranged in the hot air cover 703, and an air supply duct 704 is connected to one side of the hot air cover 703. A dust cover 705 is fixed by bolts on one side of the rotating ring 715 and at the lower notch position. A dust collection duct 708 is connected to one side of the dust collection hood 705, and a vortex air pump 702 is fixed to the top outer wall of the blocking cover 5 by bolts. And air filter 701, and one end of the air inlet of the vortex air pump 702 is connected to one end of the air filter 701, and the other end of the air filter 701 is connected to the dust suction pipe 708 through the dust suction hose 711, the air filter 701 is composed of an outer cover 713 and a built-in conical filter 714, the built-in conical filter 714 is detachably installed inside the outer cover 713 and filters the air passing through the air filter 701, one end of the air outlet of the vortex air pump 702 is fixedly connected with an air supply hose 712, and one end of the air supply hose 712 is connected to the air supply pipe 704, and a rotating drive mechanism for driving the dust suction cover 705 and the hot air cover 703 to switch the workstations is provided at the bottom of the blocking cover 5, and the rotating drive mechanism includes a driving motor 70 9, the driving motor 709 is fixed to the bottom outer wall of the blocking cover 5 by bolts, and one end of the output shaft of the driving motor 709 is keyed to the rotating gear 707, and the circumferential inner wall of the rotating ring 715 is provided with a plurality of inner tooth grooves 706 distributed at equal distances, and the inner tooth grooves 706 are meshed with the rotating gear 707. When in use, by starting the vortex air pump 702, the vortex air pump 702 rotates to generate suction at the air inlet and blow out gas from the air outlet. Since the dust hood 705 is connected to the air inlet of the vortex air pump 702 through the dust suction pipe 708, the dust suction hose 711 and the air filter 701, the dust hood 705 generates suction and absorbs and cleans the dust on the inner wall of the tunnel before the spraying, and the absorbed dust can be passed through the air filter 701 into The hot air hood 703 is connected to the air outlet of the vortex air pump 702 through the air supply duct 704 and the air supply hose 712. Since a heating wire is arranged inside the hot air hood 703, the gas blown out of the air outlet will be heated inside the hot air hood 703 and blown out, thereby realizing the auxiliary drying treatment of the fire retardant coating after spraying. When it is necessary to switch the workstation, it is only necessary to start the drive motor 709. The drive motor 709 rotates to drive the rotating gear 707 to rotate along the inner tooth groove 706 of the rotating ring 715, so that the rotating ring 715 drives the hot air hood 703 and the dust hood 705 to rotate 180° counterclockwise through the two positioning track sleeves 710, thereby completing the workstation switching. At the same time, since the dust hose 711 and the air supply hose 712 are both rubber hoses,Therefore, the dust suction hose 711 and the air supply hose 712 can be bent without affecting normal use.

[0062] The paint cleaning assembly 11 in the present invention includes a cleaning component for cleaning the residual material at the nozzles at the ends of the three spray gun heads 601 and a collecting component for collecting the residual paint inside the blocking cover 5. A telescopic electric push rod 610 is fixed to the inner wall of one side of the outer frame 9 by bolts, and one end of the telescopic electric push rod 610 is fixed to the top outer wall of the blocking cover 5. The cleaning component includes a protective cover 1102, and the protective cover 1102 is fixed to the top inner wall of the blocking cover 5 by bolts. Both sides of the blocking cover 5 are provided with avoidance vertical grooves 1105, and an installation cover 1103 is provided between the two avoidance vertical grooves 1105. The installation cover 1103 is a hollow structure with an opening at the top, and a sponge strip 110 is detachably installed inside the installation cover 1103. 1, and the sponge strip 1101 can be inserted into the protective cover 1102, both ends of the mounting cover 1103 are rotatably connected with the support plate 1108, and the support plate 1108 forms a blockage for the avoidance vertical groove 1105, both ends of the mounting cover 1103 are provided with a torsion spring 1114, and the two ends of the torsion spring 1114 are respectively fixed to the mounting cover 1103 and the support plate 1108, one end of one mounting cover 1103 is keyed to a flip gear 1113, and a flip rack 1109 that can mesh with the flip gear 1113 is fixed to one side of the blocking cover 5 by bolts, and the outer walls of both sides of the blocking cover 5 are fixed with a lifting electric push rod 1110 by bolts, and one end of the lifting electric push rod 1110 is fixed to the support plate 1108, A avoidance slot is provided at the top of the protective cover 1102, in which a scraper 1111 is inserted, and the scraper 1111 is fixed to the three spray gun support frames 609, and an angle 1112 is provided on one side of the scraper 1111, and the top of the scraper 1111 fits against the top inner wall of the blocking cover 5. When in use, first start the telescopic electric push rod 610, and the telescopic electric push rod 610 extends to drive the blocking cover 5 to move outward along the inner track 608 set on the inner wall of the outer frame 9. Since the scraper 1111 is fixed to the three spray gun support frames 609, the scraper 1111 is separated from the protective cover 1102 and the sponge strip 1101 until the blocking cover 5 moves to a suitable position, at which time the two lifting electric push rods 1110 are started at the same time. , the lifting electric push rod 1110 extends through the support plate 1108 to drive the installation cover 1103 to move downward until the flip gear 1113 is engaged with the flip rack 1109. At this time, the flip gear 1113 rotates counterclockwise along the flip rack 1109 and drives the installation cover 1103 and the sponge strip 1101 to rotate counterclockwise to 90°. At this time, the sponge strip 1101 is facing the nozzle of the spray gun head 601. Then the telescopic electric push rod 610 shortens to make the blocking cover 5 drive the installation cover 1103 and the sponge strip 1101 to move inward and make the sponge strip 1101 contact with the nozzle of the spray gun head 601 and squeeze and deform, so that the sponge strip 1101 absorbs the droplets generated from the nozzle of the spray gun head 601.Then the telescopic electric push rod 610 is extended to make the blocking cover 5 drive the installation cover 1103 and the sponge strip 1101 to move outward to a suitable position, and then the lifting electric push rod 1110 is shortened to drive the installation cover 1103 to move upward through the support plate 1108. At this time, the installation cover 1103 is reversely rotated and reset through the flip gear 1113 and the flip rack 1109. Because the gravity of the installation cover 1103 is much greater than the sponge strip 1101 and the torsion of the torsion spring 1114, the sponge strip 1101 is upward until the lifting electric push rod 1110 is shortened and reset. At this time, the sponge strip 1101 is inserted into the protective cover 1102, and then the telescopic electric push rod 610 is shortened to make the blocking cover 5 drive the installation cover 1103 and the sponge strip 1101 to move inward and reset. At this time, the scraper 1111 is reinserted into the protective cover 1102 to seal the protective cover 1102. During the insertion process, the scraper 1111 contacts and squeezes the sponge strip 1101 through the bevel 1112, so that the fire retardant coating attached to the surface of the sponge strip 1101 is scraped off into the angular cavity formed by the bevel 1112 and the top inner wall of the blocking cover 5. When the protective cover is completed, After the shield 1102 is sealed, the fire retardant paint in the angular cavity drips into the collection box 1107 under the action of gravity, so that the sponge strip 1101 is sealed and wrapped when not in operation, so as to prevent the sponge strip 1101 from being contaminated by the atomized paint generated when the spray assembly 6 is in operation. The collecting component includes two lower guide plates 1106, and the two lower guide plates 1106 are fixed to the bottom inner wall of the blocking shield 5 by bolts. A hanging groove is provided at the bottom of the blocking shield 5 and between the two lower guide plates 1106. The collection box 1107 is detachably installed in the hanging groove. The top inner wall of the blocking cover 5 is fixed with an upper guide plate 1104 by bolts, and the lowest point of the upper guide plate 1104 does not exceed the highest point of the lower guide plate 1106 near the opening of the blocking cover 5. When in use, the blocking cover 5 effectively blocks part of the atomized paint generated when the spray assembly 6 is working, and the atomized paint is partially attached to the inner wall of the blocking cover 5. Therefore, the upper guide plate 1104 is set to guide the atomized paint that is attached and accumulated to drip onto the lower guide plate 1106, and under the action of the gravity of the paint body, it enters the collection box 1107 along the lower guide plate 1106 for collection.

[0063] In order to adapt to the arc structure of the tunnel, the angle adjustment assembly 10 of the present invention includes a fixed shaft 1003, which is fixed to one side of the outer frame 9 by bolts, and the fixed shaft 1003 is hinged to the lifting frame 8. Two angle electric push rods 1002 are hinged to one side of the lifting frame 8, and one end of the two angle electric push rods 1002 is hinged to the outer frame 9. A rotating disk 1005 is fixed to both ends of the fixed shaft 1003 by bolts, and a plurality of slots 1004 distributed at equal distances are provided on the outer circumference of the rotating disk 1005. Two electric push rods 1002 are fixed to one side of the lifting frame 8 by bolts. The electric lock 1001 is controlled, and the lock tongue of the electric lock 1001 passes through the lifting frame 8 and can be engaged with the slot 1004, so that the angle of the adjusted outer frame 9 is fixed by the engagement of the lock tongue of the electric lock 1001 with the slot 1004, and by simultaneously starting the two angle electric push rods 1002, the two angle electric push rods 1002 are extended or shortened to enable the outer frame 9 to flip downward or upward around the fixed axis 1003, so that the spraying angle of the spraying component 6 is adjusted, and the spraying treatment component 7 is also flipped at the same time, which can complete the avoidance of the spraying treatment component 7 and the inner wall of the tunnel to a certain extent.

[0064] A method for using a spraying device for fire retardant coating construction comprises the following steps:

[0065] S1: First, the lifting and lowering reduction motor 104 is started, and the rotation of the lifting and lowering reduction motor 104 drives the lower sprocket 105 to rotate, and the upper sprocket 103 is driven to rotate synchronously through the chain 101, and the chain 101 and the lifting frame 8 are fixed by connecting screws, so that the chain 101 can drive the lifting frame 8 to move upward along the guide rod 102 when moving, and the two angle electric push rods 1002 are started at the same time. The extension or shortening of the two angle electric push rods 1002 can make the outer frame 9 flip downward around the fixed axis 1003, so that the spraying angle of the spraying assembly 6 can be adjusted, so that the spraying assembly 6 can adapt to the curvature of the inner wall of the tunnel;

[0066] S2: Then, fire retardant paint is added into the paint box 603, and then the stirring motor 614 is started. The stirring motor 614 rotates through the stirring frame 612 to effectively disperse the fire retardant paint in the paint box 603 to avoid the fire retardant paint from caking and affecting the spraying effect. Then, the air compressor 606 is started. The air compressor 606 rotates to generate gas, and part of the gas enters the paint box 603 from the pressure pipe 604 through the gas distributor 605, thereby increasing the pressure in the paint box 603, and the internal fire retardant paint is sent to the spray gun head 601 along the paint hose 602 under pressure. At this time, the fire retardant paint entering the paint hose 602 can be effectively filtered through the spherical filter 613 to prevent caking and large particles from entering. At the same time, part of the gas enters the spray gun head 601 from the air inlet hose 607 through the gas distributor 605 and drives the fire retardant paint to be sprayed out from the nozzle of the spray gun head 601;

[0067] S3: At this time, the blocking cover 5 can wrap and block the spraying component 6, effectively preventing the atomized paint generated during spraying from flowing in the direction of the airflow, with a part of it adhering to the inner wall of the tunnel and a part of it being scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but also easily adheres to the dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which is very easy to pollute it and affect the spraying effect of the fire retardant paint. In addition, since part of the atomized paint adheres to the inner wall of the blocking cover 5, an upper guide plate 1104 is provided to guide the atomized paint that adheres and accumulates to drip onto the lower guide plate 1106, and under the action of the gravity of the paint body, it enters the collection box 1107 along the lower guide plate 1106 for collection;

[0068] S4: At this time, the spraying assembly 6 is slowly moved downward by the lifting assembly 1, so as to achieve uniform spraying operation. At the same time, the vortex air pump 702 is started, and the vortex air pump 702 rotates to generate suction at the air inlet and blow out gas from the air outlet. Since the dust hood 705 is connected to the air inlet of the vortex air pump 702 through the dust suction pipe 708, the dust suction hose 711 and the air filter 701, the dust hood 705 generates suction and absorbs and cleans the dust on the inner wall of the tunnel before spraying, and the absorbed dust can be blocked and filtered by the air filter 701. Since the hot air hood 703 is connected to the air outlet of the vortex air pump 702 through the air supply pipe 704 and the air supply hose 712, and since a heating wire is arranged inside the hot air hood 703, the gas blown out of the air outlet will be heated from the hot air hood 703 and blown out, thereby realizing the auxiliary drying treatment of the fire retardant coating after spraying;

[0069] S5: When spraying from bottom to top, it is only necessary to start the driving motor 709, and the driving motor 709 rotates to drive the rotating gear 707 to rotate along the inner tooth groove 706 of the rotating ring 715, so that the rotating ring 715 drives the hot air hood 703 and the dust hood 705 to rotate 180° counterclockwise through the two positioning track sleeves 710, thereby completing the work station switching. At the same time, since the dust suction hose 711 and the air supply hose 712 are both rubber hoses, the dust suction hose 711 and the air supply hose 712 can be bent without affecting normal use;

[0070] S6: When it is necessary to clean the residual material at the nozzles at the ends of the three spray gun heads 601, first start the telescopic electric push rod 610, which extends to drive the blocking cover 5 to move outward along the inner track 608 set on the inner wall of the outer frame 9. Since the scraper 1111 is fixed to the three spray gun support frames 609, the scraper 1111 is separated from the protective cover 1102 and the sponge strip 1101 until the blocking cover 5 moves to a suitable position. At this time, by simultaneously starting the two lifting electric push rods 1110, the lifting electric push rod 1110 extends through the support plate 1108 to drive the installation cover 1103 to move downward , until the flip gear 1113 is meshed with the flip rack 1109, at which time the flip gear 1113 rotates counterclockwise along the flip rack 1109 and drives the mounting cover 1103 and the sponge strip 1101 to rotate counterclockwise to 90°, at which time the sponge strip 1101 is facing the nozzle of the spray gun head 601, and then the telescopic electric push rod 610 is shortened to make the blocking cover 5 drive the mounting cover 1103 and the sponge strip 1101 to move inward and make the sponge strip 1101 contact with the nozzle of the spray gun head 601 and deform under compression force, so that the droplets generated by the nozzle of the spray gun head 601 are adsorbed by the sponge strip 1101;

[0071] S7: Then the telescopic electric push rod 610 is extended to make the blocking cover 5 drive the installation cover 1103 and the sponge strip 1101 to move outward to a suitable position, and then the lifting electric push rod 1110 is shortened to drive the installation cover 1103 to move upward through the support plate 1108. At this time, the installation cover 1103 is reversely rotated and reset by the flip gear 1113 and the flip rack 1109. Because the gravity of the installation cover 1103 is much greater than the sponge strip 1101 and the torsion of the torsion spring 1114, the sponge strip 1101 faces upward until the lifting electric push rod 1110 is shortened and reset, and at this time the sponge strip 1101 is inserted into the protective cover 1102;

[0072] S8: Then the telescopic electric push rod 610 is shortened so that the blocking cover 5 drives the installation cover 1103 and the sponge strip 1101 to move inward and reset. At this time, the scraper 1111 is reinserted into the interior of the protective cover 1102 and seals the protective cover 1102. During the insertion process, the scraper 1111 contacts and squeezes the sponge strip 1101 through the bevel 1112, so that the fire retardant coating attached to the surface of the sponge strip 1101 is scraped off into the angular cavity formed by the bevel 1112 and the inner wall of the top of the blocking cover 5. When the protective cover 1102 is sealed, the fire retardant coating in the angular cavity drips into the collection box 1107 under the action of gravity, so that the sponge strip 1101 is sealed and wrapped when not working, so as to avoid the contamination of the sponge strip 1101 by the atomized coating generated when the spray assembly 6 is working and the deep cleaning of the sponge strip 1101.

[0073] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A spraying device for fire retardant coating construction, comprising a base (3), the top of the base (3) being fixedly connected to a vertical beam (2), one side of the vertical beam (2) being fixedly connected to an electric control cabinet (12), characterized in that: Two guide rods (102) are fixedly connected inside the vertical beam (2), and a lifting frame (8) is slidably connected between the two guide rods (102) via a plurality of slides. A lifting component (1) is provided inside the vertical beam (2) for driving the lifting frame (8) to move up and down along the guide rods (102). One side of the lifting frame (8) is connected to an outer frame (9) via an angle adjustment component (10). A spraying component (6) for performing air pressure spraying on a fire retardant coating is provided on an inner wall of one side of the outer frame (9). Two sets of inner rails (608) are fixedly connected to the inner walls of both sides of the outer frame (9). A blocking cover (5) for wrapping and shielding the spraying component (6) is slidably connected between the plurality of sets of inner rails (608) via slides. A spraying treatment component (7) for performing dual treatment on the spraying component (6) before and after spraying is provided on the outside of the blocking cover (5). A coating cleaning component (11) for cleaning and collecting residual materials generated during the spraying operation of the spraying component (6) is provided inside the blocking cover (5); The spraying treatment assembly (7) comprises two positioning track sleeves (710), the two positioning track sleeves (710) are fixedly connected to the outer walls of both sides of the blocking cover (5), a rotating ring (715) is rotatably connected between the two positioning track sleeves (710), a hot air cover (703) is fixedly connected to one side of the rotating ring (715) and located at the upper notch position, a heating wire is arranged in the hot air cover (703), an air supply duct (704) is connected to one side of the hot air cover (703), a dust collection hood (705) is fixedly connected to one side of the rotating ring (715) and located at the lower notch position, a dust collection hood (705) is connected to one side of the dust collection duct (708), a vortex air pump (702) and an air filter (701) are fixedly connected to the top outer wall of the blocking cover (5), and the vortex air pump (702) and the air filter (701) are fixedly connected to the top outer wall of the blocking cover (5), and the vortex air pump (702) and the air filter (701) are fixedly connected to the top outer wall of the blocking cover (5). One end of the air inlet of the air pump (702) is connected to one end of the air filter (701), and the other end of the air filter (701) is connected to the dust collection pipe (708) through a dust collection hose (711). The air filter (701) is composed of an outer cover (713) and a built-in conical filter (714). The built-in conical filter (714) is detachably mounted inside the outer cover (713) and filters the air passing through the air filter (701). One end of the air outlet of the vortex air pump (702) is fixedly connected to an air supply hose (712), and one end of the air supply hose (712) is connected to the air supply pipe (704). A rotating drive mechanism for driving the dust collection cover (705) and the hot air cover (703) to switch between workstations is provided at the bottom of the blocking cover (5); The angle adjustment assembly (10) comprises a fixed shaft (1003), the fixed shaft (1003) being fixedly connected to one side of the outer frame (9), the fixed shaft (1003) being hinged to the lifting frame (8), two angle electric push rods (1002) being hinged to one side of the lifting frame (8), and one end of the two angle electric push rods (1002) being hinged to the outer frame (9), both ends of the fixed shaft (1003) being fixedly connected to a rotating disk (1005), a plurality of slots (1004) being equidistantly distributed on the outer circumference of the rotating disk (1005), two electric control locks (1001) being fixedly connected to one side of the lifting frame (8), and the lock tongue of the electric control lock (1001) passing through the lifting frame The frame (8) can be engaged with the card slot (1004), the lifting component (1) comprises an upper sprocket (103), the upper sprocket (103) is rotatably connected to the top outer wall of the vertical beam (2) through a vertical bearing seat, the bottom inner wall of the base (3) is fixedly connected to a lifting reduction motor (104), one end of the output shaft of the lifting reduction motor (104) is fixedly connected to a lower sprocket (105), and the lower sprocket (105) and the upper sprocket (103) are connected by a chain (101), the chain (101) and the lifting frame (8) are fixed by connecting screws, a plurality of counterweights (13) are provided on one side of the base (3), and power wheels (4) are provided at the four corners of the bottom of the base (3); The rotary drive mechanism comprises a drive motor (709), the drive motor (709) being fixedly connected to the bottom outer wall of the blocking cover (5), one end of the output shaft of the drive motor (709) being fixedly connected to a rotary gear (707), a plurality of internal tooth grooves (706) distributed at equal distances being formed on the circumferential inner wall of the rotary ring (715), and the internal tooth grooves (706) being meshed with the rotary gear (707).

2. The spraying equipment for fire retardant coating construction according to claim 1, characterized in that: The spray assembly (6) comprises at least three spray gun support frames (609), the three spray gun support frames (609) are all fixedly connected to the inner wall of one side of the outer frame (9), the ends of the three spray gun support frames (609) pass through the blocking cover (5) and are fixedly connected to the spray gun heads (601), one side of the base (3) is fixedly connected to a paint box (603), one side of the paint box (603) is provided with a discharge port, a paint hose (602) is fixedly connected to the discharge port, and the paint hose (602) is connected to the paint feed ports of the three spray gun heads (601), and one side of the base (3) is fixedly connected to an air compressor (601). 06) and an air distributor (605), and one end of the air outlet of the air compressor (606) is connected to the air distributor (605), the other end of the air distributor (605) is fixed to the top air hole of the paint box (603) through a pressure pipe (604) and is connected to the inside of the paint box (603) through the air hole, the air distributor (605) is connected to the air ports of three spray gun heads (601) through two groups of air intake hoses (607), and a solenoid valve for controlling the gas flow inside the air intake hoses (607) is provided between the air intake hoses (607), and a fire retardant paint scattering mechanism is provided inside the paint box (603).

3. The spraying equipment for fire retardant coating construction according to claim 2, characterized in that: The fire-retardant coating material scattering mechanism comprises an end cover (611), the end cover (611) is fixedly connected to the top opening of the coating material box (603), the bottom of the end cover (611) is rotatably connected to a stirring frame (612) via a bearing, the top of the end cover (611) is fixedly connected to a stirring motor (614), one end of the output shaft of the stirring motor (614) is fixed to the top of the stirring frame (612) via a coupling, and a spherical filter screen (613) for filtering the fire-retardant coating material is provided on the inner side of the discharge port and inside the coating material box (603).

4. The spraying equipment for fire retardant coating construction according to claim 2, characterized in that: The paint cleaning assembly (11) comprises a cleaning component for cleaning the residual material at the nozzle ends of the three spray gun heads (601) and a collecting component for collecting the residual paint inside the blocking cover (5). A telescopic electric push rod (610) is fixedly connected to the inner wall of one side of the outer frame (9), and one end of the telescopic electric push rod (610) is fixed to the top outer wall of the blocking cover (5).

5. The spraying equipment for fire retardant coating construction according to claim 4, characterized in that: The cleaning component comprises a protective cover (1102), the protective cover (1102) being fixedly connected to the top inner wall of the blocking cover (5), both sides of the blocking cover (5) being provided with avoidance vertical grooves (1105), a mounting cover (1103) being provided between the two avoidance vertical grooves (1105), the mounting cover (1103) being a hollow structure with an opening at the top, a sponge strip (1101) being detachably installed inside the mounting cover (1103), and the sponge strip (1101) being insertable into the protective cover (1102), both ends of the mounting cover (1103) being rotatably connected with support plates (1108), and the support plates (1108) forming a blockage for the avoidance vertical grooves (1105), and both ends of the mounting cover (1103) being provided with torsion springs (1114), and the two ends of the torsion springs (1114) being respectively connected to the mounting cover (1103). 103) and a support plate (1108), one end of one of the mounting covers (1103) is fixedly connected to a flip gear (1113), one side of the blocking cover (5) is fixedly connected to a flip rack (1109) that can mesh with the flip gear (1113), both side outer walls of the blocking cover (5) are fixedly connected to lifting electric push rods (1110), and one end of the lifting electric push rods (1110) is fixed to the support plate (1108), the top of the protective cover (1102) is provided with a avoidance groove, a scraper (1111) is inserted into the avoidance groove, and the scraper (1111) is fixed to three spray gun support frames (609), one side of the scraper (1111) is provided with an oblique angle (1112), and the top of the scraper (1111) is in contact with the top inner wall of the blocking cover (5).

6. The spraying equipment for fire retardant coating construction according to claim 5, characterized in that: The collecting component comprises two lower guide plates (1106), the two lower guide plates (1106) are fixedly connected to the bottom inner wall of the blocking cover (5), a hanging groove is provided at the bottom of the blocking cover (5) and between the two lower guide plates (1106), a collecting box (1107) is detachably installed in the hanging groove, and an upper guide plate (1104) is fixedly connected to the top inner wall of the blocking cover (5), and the lowest point of the upper guide plate (1104) does not exceed the highest point of the lower guide plate (1106) close to the opening of the blocking cover (5).

7. A method for using a spraying device for fire retardant coating construction, applicable to a spraying device for fire retardant coating construction as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: First, the lifting and lowering reduction motor (104) is started, and the lifting and lowering reduction motor (104) rotates to drive the lower sprocket (105) to rotate, and the upper sprocket (103) is driven to rotate synchronously through the chain (101), and the chain (101) and the lifting frame (8) are fixed by connecting screws, so that the chain (101) can drive the lifting frame (8) to move upward along the guide rod (102) when moving, and the two angle electric push rods (1002) are started at the same time. The two angle electric push rods (1002) are extended or shortened to make the outer frame (9) flip downward around the fixed axis (1003), so that the spraying angle of the spraying component (6) can be adjusted, so that the spraying component (6) can adapt to the curvature of the inner wall of the tunnel; S2: Then, the fire retardant coating is added into the coating box (603), and then the stirring motor (614) is started. The stirring motor (614) rotates through the stirring frame (612) to effectively disperse the fire retardant coating in the coating box (603), so as to avoid the fire retardant coating from agglomerating and affecting the spraying effect. Then, the air compressor (606) is started. The air compressor (606) rotates to generate gas, and part of the gas enters the coating box (603) from the pressure pipe (604) through the gas distributor (605). The pressure in the paint box (603) is increased, and the fire-retardant paint inside is sent to the spray gun head (601) along the paint hose (602) under the action of pressure. At this time, the fire-retardant paint entering the paint hose (602) can be effectively filtered by the ball filter (613) to prevent agglomerates and large particles from entering. At the same time, part of the gas enters the spray gun head (601) from the air inlet hose (607) through the gas distributor (605) and drives the fire-retardant paint to be sprayed out from the nozzle of the spray gun head (601); S3: At this time, the blocking cover (5) can wrap and block the spraying component (6), effectively preventing the atomized paint generated during spraying from flowing in the direction of the airflow, with a portion adhering to the inner wall of the tunnel and a portion scattered in the air. The atomized paint scattered in the air not only pollutes the spraying equipment, but is also easily attached to dust in the air, and then falls on the inner wall of the tunnel after the fire retardant paint is sprayed, which is very likely to pollute it and affect the spraying effect of the fire retardant paint. Since part of the atomized paint adheres to the inner wall of the blocking cover (5), an upper guide plate (1104) is provided to guide the atomized paint that adheres and accumulates to drip onto the lower guide plate (1106), and under the action of the gravity of the paint body, it flows along the lower guide plate (1106) into the collection box (1107) for collection; S4: At this time, the spraying assembly (6) is slowly moved downward by the lifting assembly (1), thereby achieving a uniform spraying operation. At the same time, the vortex air pump (702) is started, and the vortex air pump (702) rotates to generate suction at the air inlet and blow out gas from the air outlet. Since the dust hood (705) is connected to the air inlet of the vortex air pump (702) through the dust suction pipe (708), the dust suction hose (711) and the air filter (701), the dust hood (705) generates suction and blows gas out from the air outlet. Dust on the inner wall of the tunnel before spraying is absorbed and cleaned, and the absorbed dust can be blocked and filtered by the air filter (701). Since the hot air hood (703) is connected to the air outlet of the vortex air pump (702) through the air supply pipe (704) and the air supply hose (712), and since a heating wire is arranged inside the hot air hood (703), the gas blown out of the air outlet will be heated in the hot air hood (703) and then blown out, thereby realizing auxiliary drying treatment of the fire retardant coating after spraying; S5: When spraying from bottom to top, it is only necessary to start the driving motor (709), and the driving motor (709) rotates to drive the rotating gear (707) to rotate along the inner tooth groove (706) of the rotating ring (715), so that the rotating ring (715) drives the hot air hood (703) and the dust hood (705) to rotate 180 degrees counterclockwise through the two positioning track sleeves (710), thereby completing the work station switching. At the same time, since the dust suction hose (711) and the air supply hose (712) are both rubber hoses, the dust suction hose (711) and the air supply hose (712) can be bent without affecting normal use; S6: When it is necessary to clean the residual material at the nozzles at the ends of the three spray gun heads (601), the telescopic electric push rod (610) is first started. The telescopic electric push rod (610) is extended to drive the blocking cover (5) to move outward along the inner track (608) set on the inner wall of the outer frame (9). Since the scraper (1111) is fixed to the three spray gun support frames (609), the scraper (1111) is separated from the protective cover (1102) and the sponge strip (1101) until the blocking cover (5) moves to a suitable position. At this time, the two lifting electric push rods (1110) are started at the same time. The lifting electric push rod (1110) is extended through the support plate (1108) to drive the installation cover (1103) to move downward. , until the flip gear (1113) meshes with the flip rack (1109), at which time the flip gear (1113) rotates counterclockwise along the flip rack (1109) and drives the mounting cover (1103) and the sponge strip (1101) to rotate counterclockwise to 90°, at which time the sponge strip (1101) is directly opposite the nozzle of the spray gun head (601), and then the telescopic electric push rod (610) is shortened to cause the blocking cover (5) to drive the mounting cover (1103) and the sponge strip (1101) to move inward and cause the sponge strip (1101) to contact the nozzle of the spray gun head (601) and be squeezed and deformed, thereby absorbing the droplets generated by the nozzle of the spray gun head (601) through the sponge strip (1101); S7: Then the telescopic electric push rod (610) is extended so that the blocking cover (5) drives the installation cover (1103) and the sponge strip (1101) to move outward to a suitable position, and then the lifting electric push rod (1110) is shortened to drive the installation cover (1103) to move upward through the support plate (1108). At this time, the installation cover (1103) is reversely rotated and reset by the flip gear (1113) and the flip rack (1109). Because the gravity of the installation cover (1103) is much greater than that of the sponge strip (1101) and the torsion of the torsion spring (1114), the sponge strip (1101) faces upward until the lifting electric push rod (1110) is shortened and reset, at which time the sponge strip (1101) is inserted into the protective cover (1102); S8: Then the telescopic electric push rod (610) is shortened so that the blocking cover (5) drives the installation cover (1103) and the sponge strip (1101) to move inward and reset. At this time, the scraper (1111) is reinserted into the protective cover (1102) and blocks the protective cover (1102). During the insertion process, the scraper (1111) contacts and squeezes the sponge strip (1101) through the bevel (1112), so that the fire retardant coating attached to the surface of the sponge strip (1101) is The material is scraped into the angular cavity formed by the bevel (1112) and the inner wall of the top of the blocking cover (5). After the protective cover (1102) is sealed, the fire retardant coating in the angular cavity drips into the collection box (1107) under the action of gravity, thereby allowing the sponge strip (1101) to be sealed and wrapped when not in operation, thereby preventing the sponge strip (1101) from being contaminated by atomized coating generated when the spray assembly (6) is in operation and deep cleaning of the sponge strip (1101).

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