Automatic spraying device for fireproof heat-insulating coating of steel structure

Abstract

The invention provides an automatic spraying device for a fireproof and heat-insulating coating of a steel structure, and relates to the field of fireproof coating spraying, the automatic spraying device comprises a spraying machine support frame, a paint storage box, a protective blocking cover, a limiting mounting box, a sliding mounting partition plate, a water flow conveying pipe and a water flow conveying hole; the paint storage box is in bolted connection with the upper part of the spraying machine support frame; the protective blocking cover is hinged to the upper portion of the coating storage box. The limiting mounting box is fixedly connected to the front side of the coating storage box; the sliding installation partition plate is connected to the inner side of the limiting installation box in an up-down sliding mode. The water flow conveying pipe is fixedly connected to the front side of the limiting mounting box; the water flow conveying hole is formed in the front side of the coating storage box; the situation that water adding operation is forgotten is avoided, the using effect of the spraying machine is improved, the uniformity of a coating is guaranteed, the spraying effect is improved, and the problem that the using effect of the spraying machine is affected due to the fact that workers forget water adding operation easily is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fire-proof coating spraying, and in particular to an automatic spraying device for fire-proof and heat-insulating coatings for steel structures. Background Art

[0002] When spraying fire-retardant and heat-insulating coatings onto the surface of steel structures, the coating needs to be added to the coating storage tank first, and then the air compressor is used to provide pressure to transport the fire-retardant and heat-insulating coating in the coating storage tank to the spray gun through a pipe. The spray gun sprays the coating evenly onto the surface of the steel structure according to the set parameters. The angle and spraying pressure of the spray gun are controlled by the control system to realize automated spraying operations. In order to flush the sprayer pipes, establish a stable internal pressure environment, and lubricate the internal mechanical parts, the sprayer needs to be added with water before use.

[0003] For example, CN117563800A discloses a corrosion-resistant and fire-resistant coating spraying construction process and device for steel structure engineering, which relates to the field of protective construction technology for steel structure engineering, and includes: a control rod frame structure; a positioning spraying structure, including a first positioning side plate and a second positioning side plate fixed vertically, the first positioning side plate being fixed to the control rod frame structure; a positioning spraying structure, including a first dynamic side plate and a second dynamic side plate fixed vertically, the first dynamic side plate being transferred to the control rod frame structure; a material delivery pipe body structure, including four spray hoses, the four spray hoses being correspondingly fixed to the first positioning side plate, the second positioning side plate, the first dynamic side plate and the second dynamic side plate; a position adjustment and flow stopping structure, which is respectively arranged corresponding to the four spray hoses to apply pressure to stop the flow of the spray hoses, thereby solving the technical problem that the spraying device and process in the prior art have poor adaptability to the steel structure frame form, resulting in heavy overall waste of paint and unfavorable construction economy.

[0004] However, in actual use, workers may forget to add water due to negligence or lack of experience. At this time, impurities may remain in the sprayer pipe, causing the pipe to be blocked. It also makes it difficult for the sprayer to establish a stable internal pressure environment in advance, affecting the uniformity of the paint spraying, and thus affecting the spraying quality of the steel structure fire-retardant and heat-insulating coating, and affecting the use effect of the sprayer. Summary of the Invention

[0005] The invention provides an automatic spraying device for fireproof and heat-insulating coatings for steel structures, which can shield the coating storage box with a protective cover to prevent staff from directly adding coatings into the coating storage box, and the protective cover can be opened only when adding water, which effectively avoids the situation where the impurities remaining in the sprayer pipe are blocked due to forgetting to add water during operation, and avoids the situation where the pipe needs to be shut down for maintenance due to pipe blockage, thereby ensuring the continuity of the spraying operation, reducing the downtime of the equipment, and thus ensuring the spraying efficiency of the fireproof and heat-insulating coatings for steel structures, and can ensure that the internal mechanical parts of the sprayer are fully lubricated, effectively reducing the wear between the parts, extending the overall service life of the sprayer, and reducing the maintenance and replacement costs of the sprayer. At the same time, it also enables the sprayer to establish a stable internal pressure environment in advance, avoiding the situation where the sprayer is damaged or even exploded due to unstable pressure, thereby ensuring the personal safety of the operator and the safety of the construction site, and reducing safety incidents. The possibility of such occurrence is reduced, which ensures the uniformity of paint spraying, thereby improving the spraying quality of steel structure fire retardant and heat insulation coating and improving the use effect of the sprayer. At the same time, the protective cover can prevent impurities from falling into the paint storage box when the sprayer is not in use, avoiding the inconvenience of frequent cleaning of the paint storage box, and also reduces the impurities entering the sprayer, improving the cleaning efficiency of the sprayer pipeline, and facilitating automatic spraying of different steel structures by adjusting the height and angle of the paint spray gun, effectively improving the applicability of the sprayer, while also reducing the difficulty of operation and improving the ease of use of the sprayer. By moving the sliding protective cover, the protection range of the spray protective cover is changed, which effectively avoids the situation where most of the paint is blown away by the wind due to sudden wind, effectively reducing the scattering and waste of paint during the spraying process, reducing construction costs, and reducing pollution to the environment, while further ensuring the uniformity of the coating and improving the spraying effect.

[0006] The present invention provides an automatic spraying device for fire-proof and heat-insulating coatings on steel structures, which specifically includes: a sprayer support frame, a paint storage box, a protective cover, a limit installation box, a limit structure, a spraying structure, a sliding installation partition, a water delivery pipe and a water delivery hole; the paint storage box is bolted to the upper part of the sprayer support frame; the protective cover is hinged to the upper part of the paint storage box; the limit installation box is fixedly connected to the front side of the paint storage box; the limit structure is arranged on the upper part of the paint storage box; the sliding installation partition is slidably connected to the inner side of the limit installation box up and down; the water delivery pipe is fixedly connected to the front side of the limit installation box; the water delivery hole is opened on the front side of the paint storage box; and the spraying structure is arranged on the left side of the sprayer support frame.

[0007] Furthermore, the position limiting structure includes a position limiting baffle and a sealing rubber pad; the position limiting baffle is fixedly connected to the front side of the paint storage box; and the sealing rubber pad is bonded to the outer side of the sliding mounting partition.

[0008] Furthermore, the limiting structure also includes a driven transmission gear and an active transmission rack; the driven transmission gear is fixedly connected to the front side of the protective cover; the active transmission rack is fixedly connected to the upper end surface of the sliding mounting partition, the active transmission rack is connected to the limiting mounting box for upward and downward sliding, and the active transmission rack and the driven transmission gear are engaged with each other.

[0009] Furthermore, the spraying structure includes a limiting connecting frame, a guide connecting rod and a reciprocating self-locking drive component; the limiting connecting frame is fixedly connected to the left side of the sprayer support frame; two guide connecting rods are provided, and the two guide connecting rods are respectively fixedly connected to the front and rear sides of the limiting connecting frame; two reciprocating self-locking drive components are provided, and the two reciprocating self-locking drive components are respectively bolted to the upper parts of the two guide connecting rods.

[0010] Furthermore, the spraying structure also includes a position adjustment screw, a limit mounting plate and a power transmission motor; two position adjustment screws are provided, and the two position adjustment screws are respectively rotatably connected to the inner sides of the two guide connecting rods, and the two position adjustment screws are respectively coaxially fixedly connected to the output shafts of the two reciprocating self-locking driving members; the limit mounting plate is connected to the inner sides of the two guide connecting rods by sliding up and down, and the limit mounting plate is threadedly connected to the outer sides of the two position adjustment screws; the power transmission motor is bolted to the upper part of the limit mounting plate.

[0011] Furthermore, the spraying structure also includes an angle adjustment shaft and a synchronous transmission structure; the angle adjustment shaft is rotatably connected to the upper part of the limit mounting plate; the synchronous transmission structure is a bevel gear transmission structure, and the angle adjustment shaft is connected to the output shaft of the power transmission motor through the synchronous transmission structure.

[0012] Furthermore, the spraying structure also includes a limiting connecting square shaft and a limiting mounting seat; the limiting connecting square shaft is fixedly connected to the front side of the angle adjustment shaft, and the front and rear sides of the angle adjustment shaft are threadedly connected with limiting nuts; the limiting mounting seat is sleeved on the outside of the limiting connecting square shaft.

[0013] Furthermore, the spraying structure also includes a paint spraying gun and a spraying protective cover; the paint spraying gun is bolted to the upper part of the limit mounting seat, and the paint spraying gun is connected to the paint storage tank through a feed pipe and an air compressor; the spraying protective cover is bolted to the left side of the paint spraying gun.

[0014] Furthermore, the spraying structure also includes a guide mounting plate and a wind sensor; the guide mounting plate is fixedly connected to the upper part of the spraying protective cover; and the wind sensor is fixedly connected to the upper part of the guide mounting plate.

[0015] Furthermore, the spraying structure also includes an electric push rod and a sliding protective cover; the electric push rod is bolted to the lower part of the guide mounting plate; the sliding protective cover is connected to the inner side of the guide mounting plate for sliding left and right, the sliding protective cover is fixedly connected to the piston rod of the electric push rod, and the control circuit of the electric push rod is connected in series with the control circuit of the wind sensor.

[0016] Beneficial effects The present invention shields the paint storage box with a protective cover to prevent workers from directly adding paint into the paint storage box. The protective cover can be opened only when water is added, which effectively avoids the situation where the impurities remaining in the sprayer pipe are blocked due to forgetting to add water during operation, avoids the situation where the pipe needs to be shut down for maintenance due to pipe blockage, ensures the continuity of the spraying operation, reduces the downtime of the equipment, and thus ensures the spraying efficiency of the fire-proof and heat-insulating coating on the steel structure, can ensure that the internal mechanical parts of the sprayer are fully lubricated, effectively reduces the wear between the parts, extends the overall service life of the sprayer, reduces the maintenance and replacement cost of the sprayer, and also enables the sprayer to establish a stable internal pressure environment in advance, avoids the situation where the sprayer is damaged or even exploded due to unstable pressure, ensures the personal safety of the operator and the safety of the construction site, reduces the possibility of safety accidents, and ensures the quality of the paint. The spraying uniformity is improved, thereby improving the spraying quality of the fire-retardant and heat-insulating coating of the steel structure and improving the use effect of the sprayer. At the same time, the protective cover can prevent impurities from falling into the paint storage box when the sprayer is not in use, avoiding the inconvenience of frequent cleaning of the paint storage box, and also reducing the impurities entering the sprayer, improving the cleaning efficiency of the sprayer pipeline, and facilitating automatic spraying of different steel structures by adjusting the height and angle of the paint spray gun, effectively improving the applicability of the sprayer, while also reducing the difficulty of operation and improving the ease of use of the sprayer. By moving the sliding protective cover, the protection range of the spray protective cover is changed, effectively avoiding the situation where most of the paint is blown away by the wind due to sudden wind, effectively reducing the scattering and waste of paint during the spraying process, reducing construction costs, and reducing pollution to the environment, while further ensuring the uniformity of the coating and improving the spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached figure: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the positional relationship between the paint storage box and the protective cover of the present invention.

[0021] Figure 3 It is a schematic diagram of the matching relationship between the driven transmission gear and the active transmission rack of the present invention.

[0022] Figure 4 It is a schematic diagram of the disassembled structure of the paint storage box and the limit installation box of the present invention.

[0023] Figure 5 It is a schematic diagram of the positional relationship between the paint spray gun and the spray protective cover of the present invention.

[0024] Figure 6 It is a schematic diagram of the positional relationship between the spray protection cover and the sliding protection cover of the present invention.

[0025] Figure 7 It is a schematic diagram of the positional relationship between the angle adjustment shaft and the synchronous transmission structure of the present invention.

[0026] Figure 8 It is a schematic diagram of the disassembled structure of the position-limiting connecting square shaft, the position-limiting mounting seat, the spraying protective cover and the sliding protective cover of the present invention.

[0027] Reference Signs List 1. Sprayer support frame; 101. Limit connecting frame; 102. Guide connecting rod; 103. Reciprocating self-locking drive member; 104. Position adjustment screw; 105. Limit mounting plate; 106. Power transmission motor; 107. Angle adjustment shaft; 108. Synchronous transmission structure; 109. Limit connecting square shaft; 110. Limit mounting seat; 111. Paint spray gun; 112. Spraying protective cover; 113. Guide mounting plate; 114. Electric push rod; 115. Wind sensor; 116. Sliding protective cover; 2. Paint storage box; 201. Position limit baffle; 3. Protective cover; 301. Driven transmission gear; 4. Limit mounting box; 5. Sliding mounting partition; 501. Sealing rubber pad; 502. Active transmission rack; 6. Water delivery pipe; 7. Water delivery hole. DETAILED DESCRIPTION

[0028] Example 1: Please refer to Figures 1 to 4 As shown: The present invention provides an automatic spraying device for fireproof and heat-insulating coatings on steel structures, comprising a sprayer support frame 1, a paint storage box 2, a protective cover 3, a limit installation box 4, a limit structure, a sliding installation partition 5, a water delivery pipe 6 and a water delivery hole 7; the paint storage box 2 is bolted to the upper part of the sprayer support frame 1; the protective cover 3 is hinged to the upper part of the paint storage box 2; the limit installation box 4 is fixedly connected to the front side of the paint storage box 2; the limit structure is arranged on the upper part of the paint storage box 2; the sliding installation partition 5 is connected to the inner side of the limit installation box 4 by sliding up and down; the water delivery pipe 6 is fixedly connected to the front side of the limit installation box 4; the water delivery hole 7 is opened on the front side of the paint storage box 2.

[0029] The position limiting structure includes a position limiting baffle 201 and a sealing rubber pad 501 ; the position limiting baffle 201 is fixedly connected to the front side of the paint storage box 2 ; and the sealing rubber pad 501 is bonded to the outer side of the sliding mounting partition 5 .

[0030] Among them, the limiting structure also includes a driven transmission gear 301 and an active transmission rack 502; the driven transmission gear 301 is fixedly connected to the front side of the protective cover 3; the active transmission rack 502 is fixedly connected to the upper end surface of the sliding mounting partition 5, and the active transmission rack 502 is connected to the limiting mounting box 4 for sliding up and down, and the active transmission rack 502 and the driven transmission gear 301 are engaged with each other.

[0031] The specific usage and function of this embodiment: When spraying the fireproof and heat-insulating coating on the steel structure, water is first transported to the limit installation box 4 through the water flow delivery pipe 6. At this time, the water flow will exert pressure on the sliding installation partition 5, so that the sliding installation partition 5 drives the active transmission rack 502 to slide downward. After the sliding installation partition 5 slides downward for a certain distance, water will enter the paint storage box 2 from the water flow delivery hole 7, completing the water adding operation step of the sprayer. At this time, the active transmission rack 502 will drive the driven transmission gear 301 to rotate, and the driven transmission gear 301 rotates. When the sprayer is used, the staff can manually flip the protective cover 3 over so that the protective cover 3 can cover the paint storage box 2 again. At this time, the driven transmission gear 301 will drive the active transmission rack 502 to reverse, so that the sliding partition 5 is reset.

[0032] Example 2: like Figures 2 to 8 As shown: On the basis of the first embodiment, a spraying structure is further included; the spraying structure is arranged on the left side of the spraying machine support frame 1.

[0033] Among them, the spraying structure includes a limiting connecting frame 101, a guide connecting rod 102 and a reciprocating self-locking drive 103; the limiting connecting frame 101 is fixedly connected to the left side of the sprayer support frame 1; there are two guide connecting rods 102, and the two guide connecting rods 102 are respectively fixedly connected to the front and rear sides of the limiting connecting frame 101; there are two reciprocating self-locking drive members 103, and the two reciprocating self-locking drive members 103 are respectively bolted to the upper parts of the two guide connecting rods 102.

[0034] Among them, the spraying structure also includes a position adjustment screw 104, a limit mounting plate 105 and a power transmission motor 106; there are two position adjustment screws 104, and the two position adjustment screws 104 are respectively rotatably connected to the inner sides of the two guide connecting rods 102, and the two position adjustment screws 104 are respectively coaxially fixedly connected to the output shafts of the two reciprocating self-locking driving parts 103; the limit mounting plate 105 is connected to the inner sides of the two guide connecting rods 102 by sliding up and down, and the limit mounting plate 105 is threadedly connected to the outer sides of the two position adjustment screws 104; the power transmission motor 106 is bolted to the upper part of the limit mounting plate 105.

[0035] Among them, the spraying structure also includes an angle adjustment shaft 107 and a synchronous transmission structure 108; the angle adjustment shaft 107 is rotatably connected to the upper part of the limit mounting plate 105; the synchronous transmission structure 108 is a bevel gear transmission structure, and the angle adjustment shaft 107 is connected to the output shaft of the power transmission motor 106 through the synchronous transmission structure 108.

[0036] Among them, the spraying structure also includes a limiting connecting square shaft 109 and a limiting mounting seat 110; the limiting connecting square shaft 109 is fixedly connected to the front side of the angle adjustment shaft 107, and the front and rear sides of the angle adjustment shaft 107 are threadedly connected with limiting nuts; the limiting mounting seat 110 is sleeved on the outside of the limiting connecting square shaft 109.

[0037] Among them, the spraying structure also includes a paint spraying gun 111 and a spraying protective cover 112; the paint spraying gun 111 is bolted to the upper part of the limit mounting seat 110, and the paint spraying gun 111 is connected to the paint storage tank 2 through a feed pipe and an air compressor; the spraying protective cover 112 is bolted to the left side of the paint spraying gun 111.

[0038] The spraying structure further includes a guide mounting plate 113 and a wind sensor 115 ; the guide mounting plate 113 is fixedly connected to the upper portion of the spraying protective cover 112 ; and the wind sensor 115 is fixedly connected to the upper portion of the guide mounting plate 113 .

[0039] Among them, the spraying structure also includes an electric push rod 114 and a sliding protective cover 116; the electric push rod 114 is bolted to the lower part of the guide mounting plate 113; the sliding protective cover 116 is connected to the inner side of the guide mounting plate 113 for sliding left and right, and the sliding protective cover 116 is fixedly connected to the piston rod of the electric push rod 114, and the control circuit of the electric push rod 114 is connected in series with the control circuit of the wind sensor 115.

[0040] The specific usage and function of this embodiment are as follows: When spraying the paint, the air compressor and the pipeline transport the paint in the paint storage box 2 to the paint spray gun 111, and the reciprocating self-locking drive member 103 is started, so that the reciprocating self-locking drive member 103 drives the position adjustment screw 104 to rotate. When the position adjustment screw 104 rotates, the limit mounting plate 105 slides up and down along the guide connecting rod 102 on the left side of the limit connecting frame 101, changing the height of the paint spray gun 111. After the height adjustment is completed, the power transmission motor 106 is started. At this time, the power transmission motor 106 drives the angle adjustment shaft 107 to rotate through the synchronous transmission structure 108. When the angle adjustment shaft 107 rotates, it drives the limit The connecting square shaft 109 rotates, and when the limiting connecting square shaft 109 rotates, it will drive the limiting mounting seat 110 to rotate. When the limiting mounting seat 110 rotates, it will drive the paint spray gun 111 to rotate and change the angle. At this time, the paint spray gun 111 can spray the paint onto the surface of the steel structure to complete the automatic spraying of the coating. The spray protective cover 112 can guide the paint and limit the spraying position of the paint. When the wind blows, the wind sensor 115 senses the wind and sends a signal to the control circuit of the electric push rod 114, so that the electric push rod 114 drives the sliding protective cover 116 to slide along the guide mounting plate 113, thereby extending the shielding distance of the spray protective cover 112, thereby reducing the situation where the paint is blown away by the wind.

[0041] In this article, there are several points to note: 1. The drawings of this embodiment only involve the structures related to this embodiment. Other structures can refer to the general design.

[0042] 2. In the absence of conflict, the features of this embodiment and the embodiments can be combined with each other to obtain new embodiments.

[0043] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An automatic spraying device for fireproof and heat-insulating coatings on steel structures, comprising a sprayer support frame (1), a coating storage box (2), a protective cover (3), a limit installation box (4), a limit structure, a spraying structure, a sliding installation partition (5), a water flow delivery pipe (6) and a water flow delivery hole (7); the coating storage box (2) is bolted to the upper part of the sprayer support frame (1); and is characterized in that: The protective cover (3) is hinged on the upper part of the paint storage box (2); the limit installation box (4) is fixedly connected to the front side of the paint storage box (2); the limit structure is arranged on the upper part of the paint storage box (2); the sliding installation partition (5) is connected to the inner side of the limit installation box (4) in an up-and-down sliding manner; the water flow delivery pipe (6) is fixedly connected to the front side of the limit installation box (4); the water flow delivery hole (7) is opened on the front side of the paint storage box (2); and the spraying structure is arranged on the left side of the sprayer support frame (1).

2. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 1, characterized in that: The position limiting structure comprises a position limiting baffle (201) and a sealing rubber pad (501); the position limiting baffle (201) is fixedly connected to the front side of the paint storage box (2); and the sealing rubber pad (501) is bonded to the outer side of the sliding mounting partition (5).

3. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 2, characterized in that: The limiting structure further comprises a driven transmission gear (301) and an active transmission rack (502); the driven transmission gear (301) is fixedly connected to the front side of the protective cover (3); the active transmission rack (502) is fixedly connected to the upper end surface of the sliding mounting partition (5); the active transmission rack (502) is slidably connected to the limiting mounting box (4) up and down, and the active transmission rack (502) and the driven transmission gear (301) are meshed with each other.

4. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 1, characterized in that: The spraying structure comprises a limiting connecting frame (101), a guide connecting rod (102) and a reciprocating self-locking driving member (103); the limiting connecting frame (101) is fixedly connected to the left side of the sprayer support frame (1); two guide connecting rods (102) are provided, and the two guide connecting rods (102) are respectively fixedly connected to the front and rear sides of the limiting connecting frame (101); two reciprocating self-locking driving members (103) are provided, and the two reciprocating self-locking driving members (103) are respectively bolted to the upper parts of the two guide connecting rods (102).

5. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 4, characterized in that: The spraying structure further comprises a position adjustment screw (104), a position limiting mounting plate (105) and a power transmission motor (106); two position adjustment screws (104) are provided, and the two position adjustment screws (104) are respectively rotatably connected to the inner sides of the two guide connecting rods (102), and the two position adjustment screws (104) are respectively coaxially fixedly connected to the output shafts of the two reciprocating self-locking driving members (103); the position limiting mounting plate (105) is slidably connected to the inner sides of the two guide connecting rods (102) up and down, and the position limiting mounting plate (105) is threadedly connected to the outer sides of the two position adjustment screws (104); the power transmission motor (106) is bolted to the upper part of the position limiting mounting plate (105).

6. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 5, characterized in that: The spraying structure further comprises an angle adjustment rotating shaft (107) and a synchronous transmission structure (108); the angle adjustment rotating shaft (107) is rotatably connected to the upper portion of the position-limiting mounting plate (105); the synchronous transmission structure (108) is a bevel gear transmission structure, and the angle adjustment rotating shaft (107) is transmission-connected to the output shaft of the power transmission motor (106) via the synchronous transmission structure (108).

7. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 6, characterized in that: The spraying structure further comprises a limiting connecting square shaft (109) and a limiting mounting seat (110); the limiting connecting square shaft (109) is fixedly connected to the front side of the angle adjustment rotating shaft (107), and the front and rear sides of the angle adjustment rotating shaft (107) are both threadedly connected to limiting nuts; the limiting mounting seat (110) is sleeved on the outside of the limiting connecting square shaft (109).

8. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 7, characterized in that: The spraying structure further comprises a paint spraying gun (111) and a spraying protective cover (112); the paint spraying gun (111) is bolted to the upper portion of the position-limiting mounting seat (110), and the paint spraying gun (111) is connected to the paint storage tank (2) via a feed pipe and an air compressor; the spraying protective cover (112) is bolted to the left side of the paint spraying gun (111).

9. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 8, characterized in that: The spraying structure further comprises a guide mounting plate (113) and a wind sensor (115); the guide mounting plate (113) is fixedly connected to the upper portion of the spraying protective cover (112); and the wind sensor (115) is fixedly connected to the upper portion of the guide mounting plate (113).

10. The automatic spraying device for fireproof and heat-insulating coatings for steel structures according to claim 9, characterized in that: The spraying structure further includes an electric push rod (114) and a sliding protective cover (116); the electric push rod (114) is bolted to the lower part of the guide mounting plate (113); the sliding protective cover (116) is connected to the inner side of the guide mounting plate (113) in a left-right sliding manner, the sliding protective cover (116) is fixedly connected to the piston rod of the electric push rod (114), and the control circuit of the electric push rod (114) is connected in series with the control circuit of the wind sensor (115).

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