Uniform spraying device for steel structure surface fireproof coating construction

Abstract

The invention discloses a uniform spraying device for steel structure surface fireproof coating construction, and relates to the technical field of fireproof coating spraying devices.The uniform spraying device comprises a base mechanism, rotating mechanisms are fixedly connected to the top faces of the two ends of the base mechanism, and spraying mechanisms are connected to the middles of the rotating mechanisms in a penetrating mode; according to the uniform spraying device for steel structure surface fireproof coating construction, the two ends of a middle driving shaft are fixedly sleeved with a left middle ring and a right middle ring, a left driving wheel is fixed to the exterior of the left middle ring, a right driving wheel is fixed to the exterior of the right middle ring, and the outer side face of the right middle ring is in friction connection with a left rotating pipe; a left rotating pipe is connected to the outer side face of a left driving wheel in a friction mode, a right rotating pipe is connected to the outer side face of a right driving wheel in a friction mode, a steel structure is placed in the left rotating pipe and the right rotating pipe and then fixed, and under rotation of a middle driving shaft, the left driving wheel and the right driving wheel drive the left rotating pipe and the right rotating pipe to rotate, so that the outer surface of the steel structure can be sprayed at the same rotating speed; and the spraying uniformity is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying devices for fireproof coatings, and particularly to a uniform spraying device for applying fireproof coatings on the surface of steel structures during construction. Background Art

[0002] Steel structures refer to materials used in the construction of buildings or other fields. In addition to steel pipes, steel structures also include materials such as angle irons. With the use of steel structures, it is necessary to spray fireproof coatings on the steel structures to prevent fires, avoid dangers, and reduce accidental losses.

[0003] In the existing spraying devices for fireproof coatings on steel structures, during the spraying process, manual spraying with a spray gun is carried out. The operator holds the spray gun and sprays on the outer surface of the steel structure. During the spraying process, the operator needs to move continuously and also needs to flip the steel structure, resulting in high labor intensity. Moreover, there will be omissions during the spraying process, and uniform spraying cannot be achieved, which affects the protective performance of the coating when the steel structure is used later.

[0004] Therefore, this patent proposes a uniform spraying device for applying fireproof coatings on the surface of steel structures during construction, which has high spraying efficiency, a simple and fast spraying process, and uniform spraying to solve such problems. Summary of the Invention

[0005] The present invention provides a uniform spraying device for applying fireproof coatings on the surface of steel structures, which solves the technical problems of the uniform spraying device for applying fireproof coatings on the surface of steel structures.

[0006] To solve the above technical problems, a uniform spraying device for applying fireproof paint on the surface of a steel structure provided by the present invention includes a base mechanism. At the top surfaces of both ends of the base mechanism, a rotating mechanism is fixedly connected. The middle part of the rotating mechanism is penetrated and connected with a spraying mechanism. The base mechanism includes a left base plate. At the bottom surface of the left base plate, a bottom fixing plate is fixedly connected. At the top surface of the bottom fixing plate, a right base plate is fixedly connected. At the side surface of the left base plate, a left fixing plate is fixedly connected. In the middle of the left fixing plate, a motor body is fixedly connected. In the middle of the motor body, a middle driving shaft is penetrated and connected. At one end of the middle driving shaft, a left middle ring is fixedly connected. At the other end of the middle driving shaft, a right middle ring is fixedly connected. On the outer side surface of the left middle ring, a left connecting spoke is fixedly connected. At the end of the left connecting spoke, a left driving wheel is fixedly connected. On the outer side surface of the right middle ring, a right connecting spoke is fixedly connected. At the end of the right connecting spoke, a right driving wheel is fixedly connected. On the outer side surface at the bottom of the left driving wheel, a left rotating pipe is in frictional contact. On the outer side surface at the bottom of the right driving wheel, a right rotating pipe is in frictional contact. One end of the left rotating pipe is penetrated and connected with a left main side plate. The other end of the left rotating pipe is penetrated and connected with a left auxiliary side plate. One end of the right rotating pipe is penetrated and connected with a right auxiliary side plate. The other end of the right rotating pipe is penetrated and connected with a right main side plate. In the middle of the middle driving shaft, a sprayer is fixedly connected. An inner rotating pipe is movably sleeved outside the sprayer. An outer rotating pipe is movably sleeved outside the inner rotating pipe. At one end of the outer rotating pipe, an outer left limiting ring is fixedly connected. At the other end of the outer rotating pipe, an outer right limiting ring is fixedly connected. At the bottom surface at one end of the outer rotating pipe, a left rear side rod is fixedly connected. At the bottom surface at the other end of the outer rotating pipe, a right rear side rod is fixedly connected.

[0007] Preferably, at one end of the inner rotating pipe, an inner left limiting ring is fixedly connected. At the other end of the inner rotating pipe, an inner right limiting ring is fixedly connected. At the bottom surface at one end of the inner rotating pipe, a left front side rod is fixedly connected. At the bottom surface at the other end of the inner rotating pipe, a right front side rod is fixedly connected.

[0008] Preferably, at the side surface of the right base plate, a right fixing plate is fixedly connected. In the middle of the right fixing plate, a middle driving shaft is penetrated and connected.

[0009] Preferably, the middle driving shaft is penetrated and connected through the middle parts of the outer left limiting ring and the outer right limiting ring, and the middle driving shaft is penetrated and connected through the middle parts of the inner left limiting ring and the inner right limiting ring. The outer left limiting ring and the outer right limiting ring are respectively located outside the inner left limiting ring and the inner right limiting ring.

[0010] Preferably, in the middle of the left front side rod and the left rear side rod, a left spring is fixedly connected. In the middle of the right front side rod and the right rear side rod, a right spring is fixedly connected.

[0011] Preferably, a left outer ring is fixedly connected to the bottoms of the left main side plate and the left auxiliary side plate, a left base plate is fixedly connected to the outer side surface of the left outer ring, a right outer ring is fixedly connected to the bottoms of the right main side plate and the right auxiliary side plate, and a right base plate is fixedly connected to the outer side surface of the right outer ring.

[0012] Preferably, the number of the left connecting spokes is two, the two left connecting spokes are perpendicular to each other, the left driving wheel is located in the middle of the left outer ring and has the same center, the number of the right connecting spokes is two, the two right connecting spokes are perpendicular to each other, and the right driving wheel is located in the middle of the right outer ring and has the same center.

[0013] Preferably, the left rotating pipes are uniformly arranged in the middle parts of the left main side plate and the left auxiliary side plate, the bottom of the left driving wheel is located in the middle parts of the left main side plate and the left auxiliary side plate, the right rotating pipes are uniformly arranged in the middle parts of the right auxiliary side plate and the right main side plate, and the bottom of the right driving wheel is located in the middle parts of the right main side plate and the right auxiliary side plate.

[0014] Preferably, the inner rotating pipe and the outer rotating pipe are semi-cylindrical, the axes of the inner rotating pipe and the outer rotating pipe are the same, and the top of the outer rotating pipe wraps the inner rotating pipe.

[0015] Preferably, the inner rotating pipe and the outer rotating pipe are located in the middle parts of the left auxiliary side plate and the right auxiliary side plate, circular holes are uniformly formed in the middle parts of the left main side plate and the left auxiliary side plate, and circular holes are uniformly formed in the middle parts of the right main side plate and the right auxiliary side plate.

[0016] Compared with the related art, a uniform spraying device for applying a fireproof coating on the surface of a steel structure provided by the present invention has the following beneficial effects:

[0017] The present invention provides a uniform spraying device for applying a fireproof coating on the surface of a steel structure. A sprayer is fixed in the middle of a middle driving shaft, an inner rotating pipe is movably sleeved outside the sprayer, an outer rotating pipe is movably sleeved outside the inner rotating pipe, openings are formed at the bottoms of the inner rotating pipe and the outer rotating pipe, a left front side rod and a right front side rod are fixed to the bottom of the inner rotating pipe, a left rear side rod and a right rear side rod are fixed to the bottom of the outer rotating pipe, a left middle ring and a right middle ring are fixedly sleeved at both ends of the middle driving shaft, a left driving wheel is fixed outside the left middle ring, a right driving wheel is fixed outside the right middle ring, a left rotating pipe is frictionally connected to the outer side surface of the right middle ring, a right rotating pipe is frictionally connected to the outer side surface of the right driving wheel, the steel structure is placed into the interiors of the left rotating pipe and the right rotating pipe and then fixed. Under the rotation of the middle driving shaft, the left driving wheel and the right driving wheel drive the left rotating pipe and the right rotating pipe to rotate, so that the outer surfaces of the steel structure can all be sprayed, and the rotation speeds are the same, ensuring uniform spraying.

[0018] The present invention provides a uniform spraying device for the construction of fireproof coatings on the surface of steel structures. A sprayer is fixed in the middle of the middle driving shaft. An inner rotating pipe is movably sleeved outside the sprayer, and an outer rotating pipe is movably sleeved outside the inner rotating pipe. An opening is formed at the bottom of the inner rotating pipe and the outer rotating pipe. A left front side rod and a right front side rod are fixed at the bottom of the inner rotating pipe, and a left rear side rod and a right rear side rod are fixed at the bottom of the outer rotating pipe. Left and right middle rings are fixedly sleeved at both ends of the middle driving shaft. A left driving wheel is fixed outside the left middle ring, and a right driving wheel is fixed outside the right middle ring. A left rotating pipe is frictionally connected to the outer side surface of the right middle ring, and a right rotating pipe is frictionally connected to the outer side surface of the right driving wheel. The steel structure to be sprayed is placed in the middle of the left rotating pipe and the right rotating pipe, starting from the bottom of the left rotating pipe and the right rotating pipe. After placing, the left rear side rod and the right rear side rod are in contact with the outer side surface of the last steel structure, and the left front side rod and the right front side rod are in contact with the outer side surface of the frontmost steel structure. In this way, the inner rotating pipe and the outer rotating pipe can be driven to rotate around the middle driving shaft, so that the openings at the bottom of the inner rotating pipe and the outer rotating pipe can be adjusted according to the number of steel structures, avoiding waste of paint and spraying pollution, and ensuring that each steel structure can be sprayed.

[0019] The present invention provides a uniform spraying device for the construction of fireproof coatings on the surface of steel structures. A left outer ring is fixed inside the left base plate, and a right outer ring is fixed inside the right base plate. A left main side plate and a left sub-side plate are fixed on both sides of the bottom of the left outer ring, and a right main side plate and a right sub-side plate are fixed on both sides of the bottom of the right outer ring. A left rotating pipe passes through the middle of the left main side plate and the left sub-side plate, and a right rotating pipe passes through the middle of the right main side plate and the right sub-side plate. During the rotation of the middle driving shaft, the left driving wheel drives the left rotating pipe to rotate, and the right driving wheel drives the right rotating pipe to rotate. The left rotating pipe and the right rotating pipe are both distributed in a ring shape. The sprayer located in the middle of the middle driving shaft is arc-shaped, so that the distance to each steel structure is the same during spraying, ensuring that not only the spraying of each steel structure is uniform, but also the spraying effect of each steel structure is the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present invention;

[0021] Figure 2 is the overall exploded structural schematic diagram of the present invention;

[0022] Figure 3 is the overall structural schematic diagram of both ends of the present invention;

[0023] Figure 4 is the external structural schematic diagram of the rotating pipe of the present invention;

[0024] Figure 5 is the internal structural schematic diagram of the side plate of the present invention;

[0025] Figure 6 Structural schematic diagram of the spraying mechanism of the present invention;

[0026] Figure 7 Exploded structural schematic diagram of the spraying mechanism of the present invention.

[0027] Reference numerals in the figure: 1, base mechanism; 101, left base plate; 102, bottom fixing plate; 103, right base plate; 104, left fixing plate; 105, right fixing plate; 106, motor body; 107, middle driving shaft; 2, rotating mechanism; 201, left outer ring; 202, right outer ring; 203, left middle ring; 204, left connecting spoke; 205, left driving wheel; 206, right middle ring; 207, right connecting spoke; 208, right driving wheel; 209, left main side plate; 210, left auxiliary side plate; 211, right main side plate; 212, right auxiliary side plate; 213, left rotating pipe; 214, right rotating pipe; 3, spraying mechanism; 301, inner rotating pipe; 302, outer rotating pipe; 303, left front side rod; 304, right front side rod; 305, outer left limiting ring; 306, outer right limiting ring; 307, left rear side rod; 308, right rear side rod; 309, inner left limiting ring; 310, inner right limiting ring; 311, left spring; 312, right spring; 313, sprayer. Specific embodiments

[0028] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of the respective structures described in the following embodiments are merely examples, and a uniform spraying device for applying a fireproof coating on the surface of a steel structure according to the present invention is not limited to the respective structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] Refer to Figure 1-7, the present invention provides a uniform spraying device for the construction of fireproof coatings on the surface of steel structures, including a base mechanism 1. At the top surfaces of both ends of the base mechanism 1, a rotating mechanism 2 is fixedly connected. The middle part of the rotating mechanism 2 is connected through a spraying mechanism 3. The base mechanism 1 includes a left base plate 101. At the bottom surface of the left base plate 101, a bottom fixing plate 102 is fixedly connected. At the top surface of the bottom fixing plate 102, a right base plate 103 is fixedly connected. At the side surface of the left base plate 101, a left fixing plate 104 is fixedly connected. In the middle of the left fixing plate 104, a motor body 106 is fixedly connected. The middle part of the motor body 106 is connected through a middle driving shaft 107. At one end of the middle driving shaft 107, a left middle ring 203 is fixedly connected. At the other end of the middle driving shaft 107, a right middle ring 206 is fixedly connected. At the outer side surface of the left middle ring 203, a left connecting spoke 204 is fixedly connected. At the end of the left connecting spoke 204, a left driving wheel 205 is fixedly connected. At the outer side surface of the right middle ring 206, a right connecting spoke 207 is fixedly connected. At the end of the right connecting spoke 207, a right driving wheel 208 is fixedly connected. At the outer side surface of the bottom of the left driving wheel 205, it is in frictional contact with a left rotating pipe 213. At the outer side surface of the bottom of the right driving wheel 208, it is in frictional contact with a right rotating pipe 214. One end of the left rotating pipe 213 is connected through a left main side plate 209. The other end of the left rotating pipe 213 is connected through a left sub-side plate 210. One end of the right rotating pipe 214 is connected through a right sub-side plate 212. The other end of the right rotating pipe 214 is connected through a right main side plate 211. In the middle of the middle driving shaft 107, a sprayer 313 is fixedly connected. An inner rotating pipe 301 is movably sleeved outside the sprayer 313. An outer rotating pipe 302 is movably sleeved outside the inner rotating pipe 301. At one end of the outer rotating pipe 302, an outer left limiting ring 305 is fixedly connected. At the other end of the outer rotating pipe 302, an outer right limiting ring 306 is fixedly connected. At the bottom surface of one end of the outer rotating pipe 302, a left rear side rod 307 is fixedly connected. At the bottom surface of the other end of the outer rotating pipe 302, a right rear side rod 308 is fixedly connected.

[0030] Refer to Figure 6 and Figure 7 , at one end of the inner rotating pipe 301, an inner left limiting ring 309 is fixedly connected. At the other end of the inner rotating pipe 301, an inner right limiting ring 310 is fixedly connected. At the bottom surface of one end of the inner rotating pipe 301, a left front side rod 303 is fixedly connected. At the bottom surface of the other end of the inner rotating pipe 301, a right front side rod 304 is fixedly connected.

[0031] Refer to Figures 2-4 , at the side surface of the right base plate 103, a right fixing plate 105 is fixedly connected. In the middle of the right fixing plate 105, the middle driving shaft 107 is connected through.

[0032] Refer to Figure 6 and Figure 7, a middle drive shaft 107 penetrates through the middles of an outer left limit ring 305 and an outer right limit ring 306, and a middle drive shaft 107 also penetrates through the middles of an inner left limit ring 309 and an inner right limit ring 310. The outer left limit ring 305 and the outer right limit ring 306 are respectively located outside the inner left limit ring 309 and the inner right limit ring 310.

[0033] Refer to Figure 6 and Figure 7 , a left spring 311 is fixedly connected to the middles of a left front side rod 303 and a left rear side rod 307, and a right spring 312 is fixedly connected to the middles of a right front side rod 304 and a right rear side rod 308.

[0034] Refer to Figure 2 and Figure 5 , a left outer ring 201 is fixedly connected to the bottoms of a left main side plate 209 and a left auxiliary side plate 210, and a left base plate 101 is fixedly connected to the outer side surface of the left outer ring 201. A right outer ring 202 is fixedly connected to the bottoms of a right main side plate 211 and a right auxiliary side plate 212, and a right base plate 103 is fixedly connected to the outer side surface of the right outer ring 202.

[0035] Refer to Figure 3 and Figure 4 , the number of left connecting spokes 204 is two, and the two left connecting spokes 204 are perpendicular to each other. A left driving wheel 205 is located in the middle of the left outer ring 201 and has the same center. The number of right connecting spokes 207 is two, and the two right connecting spokes 207 are perpendicular to each other. A right driving wheel 208 is located in the middle of the right outer ring 202 and has the same center.

[0036] Refer to Figures 3-5 , left rotating tubes 213 are evenly arranged in the middles of the left main side plate 209 and the left auxiliary side plate 210, and the bottom of the left driving wheel 205 is located in the middles of the left main side plate 209 and the left auxiliary side plate 210. Right rotating tubes 214 are evenly arranged in the middles of the right auxiliary side plate 212 and the right main side plate 211, and the bottom of the right driving wheel 208 is located in the middles of the right main side plate 211 and the right auxiliary side plate 212.

[0037] Refer to Figure 6 , an inner rotating tube 301 and an outer rotating tube 302 are semi-cylindrical tubes, and the axes of the inner rotating tube 301 and the outer rotating tube 302 are the same. The top of the outer rotating tube 302 wraps the inner rotating tube 301.

[0038] Refer to Figure 3 and Figure 4 , the inner rotating tube 301 and the outer rotating tube 302 are located in the middles of the left auxiliary side plate 210 and the right auxiliary side plate 212. Circular holes are evenly formed in the middles of the left main side plate 209 and the left auxiliary side plate 210, and circular holes are evenly formed in the middles of the right main side plate 211 and the right auxiliary side plate 212.

[0039] Working principle of the present invention: A sprayer 313 is fixed in the middle of the middle drive shaft 107. An inner rotating tube 301 is movably sleeved outside the sprayer 313. An outer rotating tube 302 is movably sleeved outside the inner rotating tube 301. An opening is formed at the bottom of the inner rotating tube 301 and the outer rotating tube 302. A left front side rod 303 and a right front side rod 304 are fixed at the bottom of the inner rotating tube 301. A left rear side rod 307 and a right rear side rod 308 are fixed at the bottom of the outer rotating tube 302. Left middle rings 203 and right middle rings 206 are fixedly sleeved at both ends of the middle drive shaft 107. A left driving wheel 205 is fixed outside the left middle ring 203. A right driving wheel 208 is fixed outside the right middle ring 206. A left rotating tube 213 is frictionally connected to the outer side surface of the right middle ring 206. A right rotating tube 214 is frictionally connected to the outer side surface of the right driving wheel 208. The steel structure is placed inside the left rotating tube 213 and the right rotating tube 214 and then fixed. Under the rotation of the middle drive shaft 107, the left driving wheel 205 and the right driving wheel 208 drive the left rotating tube 213 and the right rotating tube 214 to rotate, so that the outer surfaces of the steel structures can all be sprayed and the rotation speeds are the same. The steel structure to be sprayed is placed in the middle of the left rotating tube 213 and the right rotating tube 214, starting from the bottom of the left rotating tube 213 and the right rotating tube 214. After placing, the left rear side rod 307 and the right rear side rod 308 contact the outer side surface of the last steel structure, and the left front side rod 303 and the right front side rod 304 contact the outer side surface of the frontmost steel structure, which can drive the inner rotating tube 301 and the outer rotating tube 302 to rotate around the middle drive shaft 107, so that the openings at the bottoms of the inner rotating tube 301 and the outer rotating tube 302 can be adjusted according to the number of steel structures. A left outer ring 201 is fixed inside the left base plate 101. A right outer ring 202 is fixed inside the right base plate 103. Left main side plates 209 and left sub-side plates 210 are fixed on both sides of the bottom of the left outer ring 201. Right main side plates 211 and right sub-side plates 212 are fixed on both sides of the bottom of the right outer ring 202. The left rotating tube 213 passes through the middle of the left main side plate 209 and the left sub-side plate 210. The right rotating tube 214 passes through the middle of the right main side plate 211 and the right sub-side plate 212. During the rotation of the middle drive shaft 107, the left driving wheel 205 drives the left rotating tube 213 to rotate, and the right driving wheel 208 drives the right rotating tube 214 to rotate. The left rotating tube 213 and the right rotating tube 214 are both distributed in a ring shape. The sprayer 313 located in the middle of the middle drive shaft 107 is arc-shaped, and the distance to each steel structure is the same during spraying.

[0040] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or the communication inside two components, and can be a direct connection. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0041] Second, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0042] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A uniform spraying device for applying fire retardant coating on the surface of a steel structure, comprising a base mechanism (1), characterized in that: The top surfaces of both ends of the base mechanism (1) are fixedly connected to the rotating mechanism (2), the middle part of the rotating mechanism (2) is penetrated by the spraying mechanism (3), the base mechanism (1) comprises a left base plate (101), the bottom surface of the left base plate (101) is fixedly connected to the bottom fixing plate (102), the top surface of the bottom fixing plate (102) is fixedly connected to the right base plate (103), the side surface of the left base plate (101) is fixedly connected to the left fixing plate (104), the middle part of the left fixing plate (104) is fixedly connected to the motor body (106), and the motor body ( A middle driving shaft (107) is connected through the middle of the middle driving shaft (106), one end of the middle driving shaft (107) is fixedly connected to a left middle ring (203), the other end of the middle driving shaft (107) is fixedly connected to a right middle ring (206), the outer side surface of the left middle ring (203) is fixedly connected to a left connecting spoke (204), the end of the left connecting spoke (204) is fixedly connected to a left driving wheel (205), the outer side surface of the right middle ring (206) is fixedly connected to a right connecting spoke (207), the end of the right connecting spoke (207) is fixedly connected to a right driving wheel (208) ), the outer side surface of the bottom of the left driving wheel (205) is in frictional contact with a left rotating tube (213), the outer side surface of the bottom of the right driving wheel (208) is in frictional contact with a right rotating tube (214), one end of the left rotating tube (213) is connected to the left main side plate (209), the other end of the left rotating tube (213) is connected to the left auxiliary side plate (210), one end of the right rotating tube (214) is connected to the right auxiliary side plate (212), the other end of the right rotating tube (214) is connected to the right main side plate (211), the middle driving shaft (107) A sprayer (313) is fixedly connected to the middle part, the outer movably sleeve of the sprayer (313) is connected to the inner rotating tube (301), the outer movably sleeve of the inner rotating tube (301) is connected to the outer rotating tube (302), one end of the outer rotating tube (302) is fixedly connected to an outer left limiting ring (305), the other end of the outer rotating tube (302) is fixedly connected to an outer right limiting ring (306), the bottom surface of one end of the outer rotating tube (302) is fixedly connected to a left rear side rod (307), and the bottom surface of the other end of the outer rotating tube (302) is fixedly connected to a right rear side rod (308).

2. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1 is characterized in that: One end of the inner rotating tube (301) is fixedly connected to an inner left limiting ring (309), the other end of the inner rotating tube (301) is fixedly connected to an inner right limiting ring (310), the bottom surface of one end of the inner rotating tube (301) is fixedly connected to a left front side rod (303), and the bottom surface of the other end of the inner rotating tube (301) is fixedly connected to a right front side rod (304).

3. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1 is characterized in that: A right fixing plate (105) is fixedly connected to the side surface of the right base plate (103), and a central driving shaft (107) is penetrated and connected to the middle portion of the right fixing plate (105).

4. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 2 is characterized in that: The middle parts of the outer left limit ring (305) and the outer right limit ring (306) are connected through a central driving shaft (107), the middle parts of the inner left limit ring (309) and the inner right limit ring (310) are connected through a central driving shaft (107), and the outer left limit ring (305) and the outer right limit ring (306) are respectively located on the outside of the inner left limit ring (309) and the inner right limit ring (310).

5. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 2 is characterized in that: A left spring (311) is fixedly connected to the middle parts of the left front rod (303) and the left rear rod (307), and a right spring (312) is fixedly connected to the middle parts of the right front rod (304) and the right rear rod (308).

6. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1 is characterized in that: The bottoms of the left main side plate (209) and the left auxiliary side plate (210) are fixedly connected with a left outer ring (201), and the outer side surface of the left outer ring (201) is fixedly connected with a left base plate (101); the bottoms of the right main side plate (211) and the right auxiliary side plate (212) are fixedly connected with a right outer ring (202), and the outer side surface of the right outer ring (202) is fixedly connected with a right base plate (103).

7. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1 is characterized in that: The number of the left connecting spokes (204) is two, the two left connecting spokes (204) are perpendicular to each other, the left driving wheel (205) is located in the middle of the left outer ring (201) and has the same center, the number of the right connecting spokes (207) is two, the two right connecting spokes (207) are perpendicular to each other, and the right driving wheel (208) is located in the middle of the right outer ring (202) and has the same center.

8. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1 is characterized in that: The left rotating tube (213) is evenly arranged in the middle of the left main side plate (209) and the left auxiliary side plate (210), the bottom of the left driving wheel (205) is located in the middle of the left main side plate (209) and the left auxiliary side plate (210), the right rotating tube (214) is evenly arranged in the middle of the right auxiliary side plate (212) and the right main side plate (211), and the bottom of the right driving wheel (208) is located in the middle of the right main side plate (211) and the right auxiliary side plate (212).

9. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1, characterized in that: The inner rotating tube (301) and the outer rotating tube (302) are semi-cylinders, the inner rotating tube (301) and the outer rotating tube (302) have the same axis, and the top of the outer rotating tube (302) wraps around the inner rotating tube (301).

10. The uniform spraying device for fire retardant coating on the surface of steel structure according to claim 1, characterized in that: The inner rotating tube (301) and the outer rotating tube (302) are located in the middle of the left auxiliary side plate (210) and the right auxiliary side plate (212); circular holes are evenly opened in the middle of the left main side plate (209) and the left auxiliary side plate (210); and circular holes are evenly opened in the middle of the right main side plate (211) and the right auxiliary side plate (212).

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