Anti-corrosion spraying device for deep-sea steel pipe

Abstract

The invention relates to the technical field of steel pipe spraying, in particular to a deep sea steel pipe anti-corrosion spraying device which comprises a bottom plate, two symmetrically-distributed vertical frames are arranged on the bottom plate, round holes are formed in the middles of the vertical frames, a steel pipe is arranged between the two round holes in a penetrating mode, and rotating mechanisms are arranged on the opposite sides of the two vertical frames. The two rotating mechanisms respectively act on two ends of the steel pipe and drive the steel pipe to rotate; a spraying mechanism is arranged between the two vertical frames; the spraying mechanism which drives the steel pipe to rotate and is matched with the moving spraying mechanism can uniformly spray anti-corrosion paint on the surface of the steel pipe, the problem that the anti-corrosion paint on the surface of the steel pipe flows from top to bottom, and consequently the anti-corrosion paint is not uniformly distributed is solved, and the anti-corrosion paint on the surface of the steel pipe in the drying space is dried by forming the drying space. And meanwhile, by means of circulation of hot air, the gas fluidity in the drying space is improved, and the drying efficiency of the anti-corrosion paint can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel pipe spraying, and in particular to an anti-corrosion spraying device for deep-sea steel pipes. Background Art

[0002] A steel pipe is a shell structure with a hollow cross-section. Its length is much larger than its diameter. The steel pipe is used to transport fluids, powdered solids, etc. Deep-sea steel pipes are in a low-temperature, high-pressure, and highly corrosive working environment for a long time. In order to increase the service life of the steel pipe in the deep sea, it is necessary to improve the corrosion resistance of the outer surface of the steel pipe, that is, spray paint on the outer wall of the steel pipe for anti-corrosion and anti-rust protection.

[0003] For example, an anti-corrosion and heat-insulating steel pipe spraying device with publication number CN118002385B includes a base, a spraying round box is fixedly installed on the top of the base, an inlet and an outlet are respectively arranged at both ends of the spraying round box, a spraying assembly is installed in the spraying round box, and the spraying assembly is used for all-round spraying on the outside of steel pipes of different diameters, and blowing mechanisms are arranged on both sides of the spraying assembly, and the two blowing mechanisms and the spraying assembly and the spraying round box are coaxially arranged. The anti-corrosion paint is sprayed by multiple nozzles that can rotate around the same axis, so that the anti-corrosion paint can be evenly attached to the outside of the steel pipe. In addition, by adjusting the spacing between the multiple nozzles, when spraying steel pipes of different outer diameters, the spacing between the nozzles and the steel pipe can be kept consistent, so that the anti-corrosion paint sprayed on the outside of the steel pipe can maintain the same effect.

[0004] Although the above-mentioned prior art can realize the spraying of anti-corrosion paint on the surface of steel pipes, there are still some problems:

[0005] The steel pipe of the above-mentioned prior art moves along its axial direction during spraying, and the nozzle rotates around the circumference of the steel pipe. Although the anti-corrosion paint can be evenly sprayed on the surface of the steel pipe, after the anti-corrosion paint is sprayed on the surface of the steel pipe and before it dries, the anti-corrosion paint on the surface of the steel pipe will flow from top to bottom due to the influence of gravity, resulting in uneven distribution of the anti-corrosion paint on the surface of the steel pipe, and more anti-corrosion paint will gather at the bottom of the steel pipe.

[0006] It can be seen that the above-mentioned prior art still has defects and there is room for optimization and improvement. Summary of the invention

[0007] In order to solve the above technical problems, the present application provides a deep-sea steel pipe anti-corrosion spraying device, which adopts the following technical solution.

[0008] An anti-corrosion spraying device for deep-sea steel pipes, comprising a bottom plate. Two symmetrically distributed vertical frames are provided on the bottom plate. The middle part of the vertical frame has a circular hole. The steel pipe is passed through between the two circular holes. And rotating mechanisms are provided on the opposite sides of the two vertical frames. The two rotating mechanisms act on the two ends of the steel pipe respectively and drive the steel pipe to rotate. A spraying mechanism is provided between the two vertical frames. The spraying mechanism moves along the length direction of the bottom plate to evenly spray anti-corrosion paint on the surface of the rotating steel pipe.

[0009] The rotating mechanism includes a rotating ring rotatably arranged on one side of the vertical frame, and the rotating ring is coaxial with the circular hole. A U-shaped clamping rod is circumferentially and slidably penetrated through the outer side wall of the rotating ring, and the U-shaped clamping rod slides radially along the rotating ring. An arc-shaped clamping plate is detachably installed at the end of the U-shaped clamping rod located inside the rotating ring.

[0010] Preferably, a rotating ring is rotatably sleeved on the outer side wall of the rotating ring. The rotating ring is arranged between the two vertical sections of the U-shaped clamping rod. And spiral grooves are provided on both sides of the rotating ring. A plurality of matching blocks are equidistantly arranged on the opposite sides of the two vertical sections of the U-shaped clamping rod. The matching blocks slide in the spiral grooves.

[0011] Preferably, a gear ring is sleeved on the outer side of the rotating ring. A rotating shaft is rotatably arranged between the bottoms of the two vertical frames. Gears meshing with the corresponding gear rings are provided on both sides of the rotating shaft.

[0012] Preferably, the spraying mechanism includes a spraying frame. The bottom of the spraying frame has a connecting protrusion threadedly connected to the rotating shaft. And the middle part of the spraying frame has a circular hole coaxial with the circular hole. The steel pipe is passed through the circular hole. A spraying ring coaxial with the circular hole is provided on one side of the spraying frame. A plurality of spraying pipes are circumferentially penetrated through the spraying ring. The end of the spraying pipe located inside the spraying ring is connected with an arc-shaped spraying plate of a hollow shell structure. A plurality of nozzles for spraying anti-corrosion paint are evenly arranged on the concave surface of the arc-shaped spraying plate. A storage ring of a hollow structure is provided outside the spraying ring. The end of the spraying pipe背离 the nozzle is communicated with the storage ring.

[0013] Preferably, a drying mechanism is provided between the spraying frame and the left vertical frame for drying and baking the surface of the steel pipe sprayed with anti-corrosion paint.

[0014] The drying mechanism includes a plurality of annular rods equidistantly arranged between the spraying frame and the left vertical frame. A plurality of V-shaped connecting rods are circumferentially and equidistantly arranged between adjacent annular rods. The V-shaped connecting rod is formed by铰接 two straight rods. The two ends of the V-shaped connecting rod are respectively铰接 to the corresponding annular rods. The left side of the leftmost V-shaped connecting rod is铰接 to the left vertical frame. The right side of the rightmost V-shaped connecting rod is铰接 to the spraying frame. A folding heat insulation layer is commonly connected between adjacent two annular rods and the V-shaped connecting rods therebetween. The leftmost folding heat insulation layer is connected to the left vertical frame. The rightmost folding heat insulation layer is connected to the spraying frame.

[0015] When the spraying rack moves to the far right, a drying space for drying the anti-corrosion paint on the surface of the steel pipe is formed between the annular rod, the V-shaped connecting rod, the folded insulation layer, the left vertical rack and the spraying rack.

[0016] Preferably, the annular rod is a hollow shell structure, a plurality of flow holes are opened on the inner ring side of the annular rod, and both ends of the upper side of the annular rod are connected with air inlet guide strips with a hollow structure, and the lower side of the annular rod is connected with air outlet guide strips with a hollow structure, and the air outlet guide strips pass through the annular rod, and both ends of the upper sides of the two vertical frames are connected with guide air inlet strips with a hollow structure, and the two guide air inlet strips correspond to the two air inlet guide strips at the upper end of the annular rod respectively, and the air inlet guide strips slide in conjunction with the guide air inlet strips, and guide air outlet strips are provided between the lower sides of the two vertical frames, and the air outlet guide strips slide in conjunction with the guide air outlet strips.

[0017] Preferably, a plurality of air guide holes are provided at equal intervals on the guide air inlet strip and the guide air outlet strip, the positions of the air guide holes of the guide air inlet strip correspond one-to-one with the air inlet guide strip, the positions of the air guide holes of the guide air outlet strip correspond one-to-one with the air outlet guide strip, the air guide holes of the guide air inlet strip are provided with valve assemblies cooperating with the air inlet guide strip, and the air guide holes of the guide air outlet strip are also provided with valve assemblies cooperating with the air outlet guide strip.

[0018] Preferably, an arc-shaped heat source frame is provided on the vertical frame, an electric heating wire is provided in the arc-shaped heat source frame, the two ends of the guide air inlet strip are respectively connected to the two arc-shaped heat source frames, an air pump is provided at the bottom of the vertical frame, the air inlet end of the air pump is connected to the guide air inlet strip through a pipeline, and the air outlet end of the air pump is also connected to the arc-shaped heat source frame through a pipeline.

[0019] Preferably, the valve assembly includes a sliding rod passing through the air guide hole, a sealing plate connected to the sliding rod is arranged in the guide air inlet strip, a spring is connected between the sealing plate and the inner wall of the guide air inlet strip, the spring drives the sealing plate to move toward the air guide hole to close the air guide hole, the end of the sliding rod away from the sealing plate is connected to a resistance end cover, the end of the resistance end cover away from the sliding rod is set as an arc-shaped convex structure, and a plurality of through holes connected to the air guide hole are opened on the resistance end cover.

[0020] Preferably, the concave surface of the arc-shaped clamping plate is provided with an arc-shaped pad for increasing the friction between the arc-shaped clamping plate and the steel pipe.

[0021] In summary, this application includes the following beneficial technical effects:

[0022] 1. The present invention can evenly spray anti-corrosion paint on the surface of the steel pipe by driving the steel pipe to rotate and cooperating with the moving spraying mechanism, thereby avoiding the problem of uneven distribution of the anti-corrosion paint caused by the anti-corrosion paint flowing from top to bottom on the surface of the steel pipe.

[0023] 2. The present invention forms a drying space to dry the anti-corrosion paint on the surface of the steel pipe in the drying space. At the same time, by using the circulating flow of hot air, the gas fluidity in the drying space is improved, which helps to accelerate the drying efficiency of the anti-corrosion paint. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present invention.

[0025] Figure 2 is a schematic structural diagram of the rotating mechanism of the present invention.

[0026] Figure 3 is the present invention Figure 2 partial enlarged view of part A.

[0027] Figure 4 is the schematic structure of the spraying mechanism of the present invention Figure 1 .

[0028] Figure 5 is the schematic structure of the spraying mechanism of the present invention Figure 2 .

[0029] Figure 6 is the schematic structure of the drying mechanism of the present invention Figure 1 .

[0030] Figure 7 is the schematic structure of the drying mechanism of the present invention Figure 2 .

[0031] Figure 8 is the present invention Figure 7 partial enlarged view of part B.

[0032] Fig. 9 is the schematic structural diagram of the valve assembly of the present invention.

[0033] Description of the reference numerals: 1, bottom plate; 2, vertical frame; 3, rotating mechanism; 4, spraying mechanism; 31, rotating ring; 32, gear ring; 33, rotating shaft; 34, gear; 35, U-shaped clamping rod; 36, arc-shaped clamping plate; 361, arc-shaped pad; 37, rotating ring; 371, spiral groove; 38, mating block; 40, spraying frame; 41, connecting protrusion; 42, spraying ring; 43, spraying pipe; 44, arc-shaped spraying plate; 45, nozzle; 46, material storage ring; 47, slide rail block; 5, drying mechanism; 51, annular rod; 52, V-shaped connecting rod; 53, folding heat insulation layer; 54, air inlet guide bar; 55, air outlet guide bar; 56, guiding air inlet bar; 57, guiding air outlet bar; 58, air guide hole; 59, arc-shaped heat source frame; 50, air pump; 6, valve assembly; 61, slide bar; 62, sealing plate; 63, spring; 64, abutting end cover; 65, through hole. Detailed Embodiment

[0034] The following will further elaborate on this application in conjunction with the attached Figures 1 to 9 drawings.

[0035] Referring to Figure 1 , a deep - sea steel pipe anti - corrosion spraying device includes a bottom plate 1. On the bottom plate 1, there are two symmetrically distributed vertical frames 2. The middle of the vertical frame 2 has a circular hole. The steel pipe passes through between the two circular holes, and on the opposite sides of the two vertical frames 2, there are rotation mechanisms 3 respectively. The two rotation mechanisms 3 act on the two ends of the steel pipe and drive the steel pipe to rotate. Between the two vertical frames 2, there is a spraying mechanism 4. The spraying mechanism 4 moves along the length direction of the bottom plate 1 to evenly spray anti - corrosion paint on the surface of the rotating steel pipe.

[0036] Specifically, referring to Figures 1 to 3 , the rotation mechanism 3 includes a rotating ring 31 rotatably arranged on one side of the vertical frame 2, and the rotating ring 31 is coaxial with the circular hole. A gear ring 32 is sleeved on the outer side of the rotating ring 31. Between the bottoms of the two vertical frames 2, there is a rotating shaft 33 rotatably arranged. On both sides of the rotating shaft 33, there are gears 34 meshing with the corresponding gear rings 32. An external drive forces the rotating shaft 33 to rotate. The rotating shaft 33 drives the gears 34 to rotate, and then under the meshing of the gears 34 and the gear rings 32, the rotation of the rotating ring 31 is realized, so that the rotating ring 31 drives the steel pipe to rotate.

[0037] Furthermore, a U - shaped clamping rod 35 is circumferentially and slidably penetrated through the outer side wall of the rotating ring 31, and the U - shaped clamping rod 35 slides radially along the rotating ring 31. At the end of the U - shaped clamping rod 35 located inside the rotating ring 31, an arc - shaped clamping plate 36 is detachably installed. An arc - shaped pad 361 is provided on the concave surface of the arc - shaped clamping plate 36. The arc - shaped pad 361 is preferably made of rubber material that can increase the friction between the arc - shaped clamping plate 36 and the steel pipe. The detachable arc - shaped clamping plate 36 can select a suitable model size according to the diameter of the steel pipe, so that this application can be applicable to steel pipes with different diameter sizes.

[0038] The steel pipe is clamped on the axis of the rotating ring 31 by the arc - shaped clamping plate 36. Therefore, when the rotating ring 31 rotates, it can drive the steel pipe to rotate synchronously, which is convenient for the subsequent spraying mechanism 4 to spray anti - corrosion paint on the surface of the steel pipe.

[0039] A rotating ring 37 is rotatably sleeved on the outer side wall of the rotating ring 31. The rotating ring 37 is arranged between the two vertical sections of the U - shaped clamping rod 35, and spiral grooves 371 are provided on both sides of the rotating ring 37. On the opposite sides of the two vertical sections of the U - shaped clamping rod 35, a number of matching blocks 38 are equidistantly arranged. The matching blocks 38 slide in the spiral grooves 371. Therefore, when the rotating ring 37 rotates, the spiral grooves 371 of the rotating ring 37 will slide - cooperate with the matching blocks 38 of the U - shaped clamping rod 35, so as to realize the radial movement of the U - shaped clamping rod 35 along the rotating ring 31 under the drive of the matching blocks 38, thereby controlling the direction of the arc - shaped clamping plate 36 moving closer to or away from the steel pipe, that is, controlling the clamping of the arc - shaped clamping plate 36 on the steel pipe.

[0040] See also Figure 4 and Figure 5 The spraying mechanism 4 includes a spraying frame 40, the bottom of which is provided with a connecting protrusion 41 threadedly connected to the rotating shaft 33, and the middle of the spraying frame 40 is provided with a circular hole coaxial with the circular hole, and a steel pipe is passed through the circular hole. A spraying ring 42 coaxial with the circular hole is provided on one side of the spraying frame 40, and a plurality of spraying tubes 43 are circumferentially passed through the spraying ring 42. The ends of the spraying tubes 43 in the spraying ring 42 are connected with an arc-shaped spraying plate 44 with a hollow shell structure, and a plurality of nozzles 45 for spraying anti-corrosion paint are evenly arranged on the concave surface of the arc-shaped spraying plate 44. A hollow material storage ring 46 is provided on the outer side of the spraying ring 42, and the end of the spraying tube 43 away from the nozzle 45 is connected to the material storage ring 46.

[0041] When the rotating shaft 33 rotates and the steel pipe rotates, the anti-corrosion paint stored in the storage ring 46 enters the arc-shaped spray plate 44 through the spray pipe 43, and is evenly sprayed onto the outer wall of the steel pipe through the nozzle 45. At the same time, when the rotating shaft 33 rotates, the connecting protrusion 41 cooperates with its thread, so that the spray frame 40 moves along the length direction of the steel pipe, so that the anti-corrosion paint can be evenly sprayed on the outer wall of the steel pipe.

[0042] The rotating steel pipe is evenly moved along the length of the steel pipe, so that the anti-corrosion paint can be evenly sprayed on the outer wall of the steel pipe.

[0043] See also Figures 6 to 8 A drying mechanism 5 is provided between the spraying frame 40 and the vertical frame 2 on the left, which is used to dry the surface of the steel pipe sprayed with anti-corrosion paint to accelerate the solidification of the anti-corrosion paint. It should be noted that the movement and spraying direction of the spraying mechanism 4 is from left to right. Figure 6 Indicated.

[0044] Specifically, the drying mechanism 5 includes a plurality of annular rods 51 equally spaced between the spray frame 40 and the left vertical frame 2, and a plurality of V-shaped connecting rods 52 are circumferentially equally spaced between adjacent annular rods 51. The V-shaped connecting rod 52 is formed by hingedly connecting two straight rods. The two ends of the V-shaped connecting rod 52 are respectively hinged on the corresponding two annular rods 51. The left side of the leftmost V-shaped connecting rod 52 is hinged on the left vertical frame 2, and the right side of the rightmost V-shaped connecting rod 52 is hinged on the spray frame 40. A folding thermal insulation layer 53 is commonly connected between the two adjacent annular rods 51 and the V-shaped connecting rod 52 therebetween. The leftmost folding thermal insulation layer 53 is connected to the left vertical frame 2, and the rightmost folding thermal insulation layer 53 is connected to the spray frame 40.

[0045] When the spraying frame 40 is in the initial state, that is, the spraying frame 40 is located at the far left, the spacing between adjacent annular rods 51 is the shortest, the angle between the two straight rods of the V-shaped connecting rod 52 is the smallest, and the folded thermal insulation layer 53 is also in a folded state. When the spraying mechanism 4 starts to spray the surface of the steel pipe, the spraying mechanism 4 starts to move from left to right. The spraying frame 40 will pull the V-shaped connecting rod 52 and the annular rod 51 to move to the right, and the folded thermal insulation layer 53 also starts to gradually unfold until the spraying frame 40 moves to the far right. At this time, the spacing between adjacent annular rods 51 is the largest, the opening angle of the V-shaped connecting rod 52 is the largest, and the folded thermal insulation layer 53 is also in an open state, thereby forming a relatively closed dry space between the annular rod 51, the V-shaped connecting rod 52, the folded thermal insulation layer 53, the left vertical frame 2 and the spraying frame 40, and hot air is slowly introduced into the dry space. In this way, the surface of the steel pipe sprayed with anti-corrosion paint in the dry space can be dried.

[0046] It should be noted that the flow rate of the hot air entering the drying space should not be too fast, so as to avoid the anti-corrosion paint on the surface of the steel pipe being blown away by the flow rate, causing uneven distribution of the anti-corrosion paint.

[0047] The annular rod 51 is a hollow shell structure, and a plurality of flow holes are provided on the inner ring side of the annular rod 51. Both ends of the upper side of the annular rod 51 are connected with hollow air inlet guide strips 54, and the lower side of the annular rod 51 is connected with hollow air outlet guide strips 55, and the air outlet guide strips 55 penetrate the annular rod 51 and extend into the drying space. Both ends of the upper sides of the two vertical frames 2 are connected with hollow guide air inlet strips 56, and the two guide air inlet strips 56 correspond to the two air inlet guide strips 54 at the upper ends of the annular rod 51 respectively, and the air inlet guide strips 54 and the guide air inlet strips 56 are slidably matched, and a guide air outlet strip 57 is provided between the lower sides of the two vertical frames 2, and the air outlet guide strips 55 and the guide air outlet strips 57 are slidably matched.

[0048] A plurality of air guide holes 58 are evenly spaced on the guide air inlet strip 56 and the guide air outlet strip 57. The positions of the air guide holes 58 of the guide air inlet strip 56 correspond to the air inlet strip 54 one by one, and the positions of the air guide holes 58 of the guide air outlet strip 57 correspond to the air outlet strip 55 one by one. That is, when the spraying rack 40 moves to the rightmost side, the guide air inlet strip 56 is connected to the air inlet strip 54 through the air guide holes 58, and the guide air outlet strip 57 is connected to the air outlet strip 55 through the air guide holes 58, so that hot air is introduced into the guide air inlet strip 56. The hot air enters the air inlet guide strip 54 through the air guide hole 58, then enters the annular rod 51, and finally enters the drying space through the flow hole of the annular rod 51, thereby achieving the drying treatment of the anti-corrosion paint on the surface of the steel pipe; since the hot air floats in the upper area, that is, the upper area in the drying space, in order to improve the uniformity of hot air distribution, the gas in the bottom area of ​​the drying space will enter the air outlet guide strip 55, and then merge into the guide air outlet strip 57 through the air guide hole 58 of the guide air outlet strip 57.

[0049] An arc-shaped heat source frame 59 is provided on the vertical frame 2, and an electric heating wire is provided in the arc-shaped heat source frame 59. The two ends of the guide air inlet strip 56 are respectively connected to the two arc-shaped heat source frames 59. An air pump 50 is provided at the bottom of the vertical frame 2. The air inlet end of the air pump 50 is connected to the guide air inlet strip 56 through a pipeline, and the air outlet end of the air pump 50 is also connected to the arc-shaped heat source frame 59 through a pipeline. When the air pump 50 is started, the gas in the guide air outlet strip 57 is pumped into the air pump 50, and then pumped out into the arc-shaped heat source frame 59, so that the electric heating wire therein heats the gas. The heated gas flows into the guide air inlet strip 56, and then finally flows into the drying space through the annular rod 51, thereby realizing the circulation of hot air to dry the anti-corrosion paint on the surface of the steel pipe in the drying space.

[0050] The outer wall of the spray rack 40 is provided with three slide rail blocks 47 , which respectively correspond to the guide air outlet strip 57 and the two guide air inlet strips 56 , and slide with the corresponding guide air outlet strip 57 or guide air inlet strip 56 to improve the movement stability of the spray rack 40 .

[0051] See also Fig. 9 The air guide hole 58 leading to the air inlet strip 56 is provided with a valve assembly 6 cooperating with the air inlet strip 54 , and the air guide hole 58 leading to the air outlet strip 57 is also provided with a valve assembly 6 cooperating with the air outlet strip 55 .

[0052] Taking the air guide hole 58 and the air intake guide strip 54 of the guide air intake strip 56 as an example, specifically, the valve assembly 6 includes a sliding rod 61 passing through the air guide hole 58, a sealing plate 62 connected to the sliding rod 61 is arranged in the guide air intake strip 56, a spring 63 is connected between the sealing plate 62 and the inner wall of the guide air intake strip 56, the spring 63 drives the sealing plate 62 to move toward the air guide hole 58 to close the air guide hole 58, the end of the sliding rod 61 away from the sealing plate 62 is connected to a resistance end cover 64, the end of the resistance end cover 64 away from the sliding rod 61 is set as an arc-shaped convex structure, and a plurality of through holes 65 connected to the air guide hole 58 are opened on the resistance end cover 64.

[0053] When the air intake guide 54 slides in the guide air intake strip 56, when the air intake guide 54 slides to the abutment end cover 64, the air intake guide 54 will first contact the arc-shaped convex surface of the abutment end cover 64, and push the abutment end cover 64 to move toward the air guide hole 58, and the abutment end cover 64 will also drive the sealing plate 62 to move synchronously through the sliding rod 61, so that the sealing cover leaves the air guide hole 58, and at this time the spring 63 is in a compressed state, and the hot air in the guide air intake strip 56 enters the through hole 65 through the air guide hole 58, and then enters the air intake guide 54, and finally flows into the drying space through the annular rod 51.

[0054] When the air intake guide 54 moves away from the air guide hole 58, that is, the air intake guide 54 is not in contact with the abutting end cover 64, at this time, under the push of the spring 63, the sealing plate 62 moves toward the air guide hole 58 and blocks the air guide hole 58 again, so that the hot air in the guide air intake strip 56 cannot enter the air intake guide 54 through the air guide hole 58.

[0055] It should be noted that when the spray rack 40 moves to the far right, the distance between adjacent annular rods 51 is the largest, the V-shaped connecting rod 52 is opened at the largest angle, the folded thermal insulation layer 53 is also in an open state, and a plurality of air inlet guide strips 54 are located at the same position as the air guide holes 58 of the corresponding guide air inlet strips 56, and the air inlet guide strips 54 are connected to the guide air inlet strips 56 through the valve assembly 6. Similarly, a plurality of air outlet guide strips 55 are located at the same position as the air guide holes 58 of the corresponding guide air outlet strips 57, and the air outlet guide strips 55 are connected to the guide air outlet strips 57 through the valve assembly 6.

[0056] After the drying process of the anti-corrosion paint on the steel pipe is completed, the rotating shaft 33 is driven to rotate in the opposite direction, which will drive the spraying mechanism 4 to move from right to left until it moves to the initial position. During this process, the drying mechanism 5 will also be reset to a folded and stored state, so as to avoid affecting the staff's inspection of the spraying and drying conditions of the anti-corrosion paint on the steel pipe.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep-sea steel pipe anti-corrosion spraying device, comprising a bottom plate (1), characterized in that: On the bottom plate (1), there are two symmetrically distributed upright frames (2). The middle of the upright frame (2) has a circular hole. A steel pipe is passed through between the two circular holes. And on the opposite sides of the two upright frames (2), there are rotation mechanisms (3) respectively. The two rotation mechanisms (3) act on the two ends of the steel pipe respectively and drive the steel pipe to rotate; between the two upright frames (2), there is a spraying mechanism (4). The spraying mechanism (4) moves along the length direction of the bottom plate (1) to evenly spray anti-corrosion paint on the surface of the rotating steel pipe; The rotation mechanism (3) includes a rotating ring (31) rotatably arranged on one side of the upright frame (2), and the rotating ring (31) is coaxial with the circular hole. A U-shaped clamping rod (35) is circumferentially slidably passed through the outer side wall of the rotating ring (31), and the U-shaped clamping rod (35) slides radially along the rotating ring (31). An arc-shaped clamping plate (36) is detachably installed at the end of the U-shaped clamping rod (35) located inside the rotating ring (31).

2. A deep-sea steel pipe anti-corrosion spraying device according to claim 1, characterized in that: A rotating ring (37) is rotatably sleeved on the outer side wall of the rotating ring (31). The rotating ring (37) is arranged between the two vertical sections of the U-shaped clamping rod (35). And spiral grooves (371) are provided on both sides of the rotating ring (37). A number of matching blocks (38) are equidistantly arranged on the opposite sides of the two vertical sections of the U-shaped clamping rod (35). The matching blocks (38) slide in the spiral grooves (371).

3. The deep-sea steel pipe anti-corrosion spraying device according to claim 1 is characterized in that: A toothed ring (32) is sleeved outside the rotating ring (31). A rotating shaft (33) is rotatably arranged between the bottoms of the two upright frames (2). Gears (34) meshing with the corresponding toothed rings (32) are provided on both sides of the rotating shaft (33).

4. The deep-sea steel pipe anti-corrosion spraying device according to claim 3 is characterized in that: The spraying mechanism (4) includes a spraying frame (40). The bottom of the spraying frame (40) has a connecting protrusion (41) threadedly connected to the rotating shaft (33). And a circular hole coaxial with the circular hole is provided in the middle of the spraying frame (40). The steel pipe is passed through the circular hole. A spraying ring (42) coaxial with the circular hole is provided on one side of the spraying frame (40). A plurality of spraying pipes (43) are circumferentially passed through the spraying ring (42). The end of the spraying pipe (43) located inside the spraying ring (42) is connected to an arc-shaped spraying plate (44) with a hollow shell structure. Nozzles (45) for spraying anti-corrosion paint are evenly provided on the concave surface of the arc-shaped spraying plate (44). A storage ring (46) with a hollow structure is provided outside the spraying ring (42). The end of the spraying pipe (43) facing away from the nozzle (45) is communicated with the storage ring (46).

5. The deep-sea steel pipe anti-corrosion spraying device according to claim 4 is characterized in that: A drying mechanism (5) is provided between the spraying frame (40) and the left upright frame (2) for drying and baking the surface of the steel pipe sprayed with anti-corrosion paint; The drying mechanism (5) comprises a plurality of annular rods (51) arranged at equal intervals between the spray rack (40) and the left vertical rack (2); a plurality of V-shaped connecting rods (52) are arranged at equal intervals between adjacent annular rods (51); the V-shaped connecting rods (52) are formed by hingedly connecting two straight rods; the two ends of the V-shaped connecting rods (52) are respectively hingedly connected to the corresponding annular rods (51); the left side of the leftmost V-shaped connecting rod (52) is hingedly connected to the left vertical rack (2); the right side of the rightmost V-shaped connecting rod (52) is hingedly connected to the spray rack (40); a folding thermal insulation layer (53) is commonly connected between two adjacent annular rods (51) and the V-shaped connecting rod (52) therebetween; the leftmost folding thermal insulation layer (53) is connected to the left vertical rack (2); and the rightmost folding thermal insulation layer (53) is connected to the spray rack (40); When the spraying frame (40) moves to the rightmost side, a drying space for drying the anticorrosive paint on the surface of the steel pipe is formed between the annular rod (51), the V-shaped connecting rod (52), the folded thermal insulation layer (53), the left vertical frame (2) and the spraying frame (40).

6. The deep-sea steel pipe anti-corrosion spraying device according to claim 5 is characterized in that: The annular rod (51) is a hollow shell structure. A plurality of flow holes are provided on the inner ring side of the annular rod (51). Both ends of the upper side of the annular rod (51) are connected to air inlet guide strips (54) of a hollow structure. The lower side of the annular rod (51) is connected to air outlet guide strips (55) of a hollow structure. The air outlet guide strips (55) penetrate the annular rod (51). Both ends of the upper sides of the two vertical frames (2) are connected to guide air inlet strips (56) of a hollow structure. The two guide air inlet strips (56) correspond to the two air inlet guide strips (54) at the upper ends of the annular rod (51). The air inlet guide strips (54) are slidably matched with the guide air inlet strips (56). A guide air outlet strip (57) is provided between the lower sides of the two vertical frames (2). The air outlet strip (55) is slidably matched with the guide air outlet strip (57).

7. The deep-sea steel pipe anti-corrosion spraying device according to claim 6 is characterized by: A plurality of air guide holes (58) are evenly spaced on the guide air inlet strip (56) and the guide air outlet strip (57); the positions of the air guide holes (58) of the guide air inlet strip (56) correspond to the air inlet strip (54); the positions of the air guide holes (58) of the guide air outlet strip (57) correspond to the air outlet strip (55); the air guide holes (58) of the guide air inlet strip (56) are provided with valve assemblies (6) that cooperate with the air inlet strip (54); and the air guide holes (58) of the guide air outlet strip (57) are also provided with valve assemblies (6) that cooperate with the air outlet strip (55).

8. The deep-sea steel pipe anti-corrosion spraying device according to claim 6 is characterized by: The vertical frame (2) is provided with an arc-shaped heat source frame (59), an electric heating wire is provided inside the arc-shaped heat source frame (59), the two ends of the guide air inlet strip (56) are respectively connected to the two arc-shaped heat source frames (59), and an air pump (50) is provided at the bottom of the vertical frame (2), the air inlet end of the air pump (50) is connected to the guide air inlet strip (56) through a pipeline, and the air outlet end of the air pump (50) is also connected to the arc-shaped heat source frame (59) through a pipeline.

9. The deep-sea steel pipe anti-corrosion spraying device according to claim 7, characterized in that: The valve assembly (6) includes a sliding rod (61) passing through the air guide hole (58), a sealing plate (62) connected to the sliding rod (61) is arranged in the guide air inlet strip (56), a spring (63) is connected between the sealing plate (62) and the inner wall of the guide air inlet strip (56), the spring (63) drives the sealing plate (62) to move toward the air guide hole (58) to close the air guide hole (58), the end of the sliding rod (61) away from the sealing plate (62) is connected to a resistance end cover (64), the end of the resistance end cover (64) away from the sliding rod (61) is set as an arc convex structure, and a plurality of through holes (65) connected to the air guide hole (58) are opened on the resistance end cover (64).

10. The deep-sea steel pipe anti-corrosion spraying device according to claim 1, characterized in that: The concave surface of the arc-shaped clamping plate (36) is provided with an arc-shaped pad (361) for increasing the friction force between the arc-shaped clamping plate (36) and the steel pipe.

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