Large-diameter welded pipe automatic spraying anticorrosive coating equipment

Abstract

The utility model relates to metal surface treatment technical field discloses a kind of large-diameter welded pipe automatic spraying anticorrosive layer equipment, including bottom plate, the upper center of the bottom plate is provided with drying mechanism;The drying mechanism includes electric telescopic link fixedly connected at the upper center of bottom plate, the upper fixed connection of the bottom plate has fixed column, the top movable end of electric telescopic link is fixedly connected with support table, the top of the support table is respectively fixedly connected with motor and connecting table, the inner wall of connecting table is penetrated and is rotatably connected with link table, the front of link table is provided with measuring mechanism.In the utility model, threaded rod drives oval plate movement, so that electric heating roller can be vertically adjusted position to adapt to the size of welded pipe, motor drives link table and electric heating roller rotation, combined with the heating function of electric heating roller, can be all-round, evenly preheating drying to welded pipe, reduce moisture influence spraying quality, provide good foundation for subsequent anticorrosive layer spraying.

Description

Technical Field

[0001] This utility model relates to the field of metal surface treatment technology, and in particular to an automatic anti-corrosion coating equipment for large-diameter welded pipes. Background Technology

[0002] Large-diameter welded pipes refer to steel pipes made from steel plates or strips through welding processes, with a nominal diameter (DN) typically greater than or equal to 300 mm. Their diameter range generally covers from 300 mm to several meters (e.g., DN300-DN3000 and above). Depending on the welding method, common types include straight seam welded pipes (steel plates rolled and then welded longitudinally) and spiral welded pipes (steel strips wound in a spiral and then welded). The materials are mostly carbon structural steel (such as Q235, Q355) and low-alloy high-strength steel. Stainless steel or alloy steel pipes are used in some special applications. These steel pipes are widely used in long-distance water, oil, and gas pipeline projects, as well as municipal drainage and steel structure supports. Their core characteristics are large diameter and high flow rate. The welding process enables the industrial production of large-size pipes, resulting in lower costs than seamless steel pipes of the same specifications. To reduce corrosion, the interior of the welded pipe requires spray coating.

[0003] During spraying, the coating is applied using an automatic spraying machine with a rotating nozzle.

[0004] During spraying operations, when the ambient temperature drops to around zero degrees Celsius, condensation easily forms on the inner wall of the pipe due to the interaction between the sudden temperature drop and air humidity. This moisture adheres to the pipe wall surface, including flat areas, weld protrusions, and inner wall depressions. The moisture forms a continuous or discontinuous liquid isolation layer on the inner wall surface of the pipe, preventing the coating from directly contacting the steel pipe surface and posing a serious threat to the quality of the subsequent anti-corrosion coating. To address this issue, an automatic anti-corrosion coating spraying device for large-diameter welded pipes is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an automatic spraying anti-corrosion coating equipment for large-diameter welded pipes, which aims to improve the problem in the prior art where, when the ambient temperature is low during spraying operations, condensation easily forms on the inner wall of the pipe due to cooling and air humidity, hindering the bonding of the coating to the steel pipe surface and affecting the quality of the anti-corrosion coating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automatic anti-corrosion coating equipment for large-diameter welded pipes, including a base plate, wherein a drying mechanism is provided at the upper center of the base plate;

[0007] The drying mechanism includes an electric telescopic rod fixedly connected to the upper center of a base plate. A fixed column is fixedly connected to the upper part of the base plate. A support platform is fixedly connected to the top movable end of the electric telescopic rod. A motor and a connecting platform are fixedly connected to the top of the support platform. A connecting platform is rotatably connected through the inner wall of the connecting platform. A rotating column is rotatably connected to the inner wall of the connecting platform. A fixed plate is fixedly connected to the outer arc surface of the rotating column. A connecting plate is hinged to the side of the fixed plate away from the rotating column. An electric heating roller is hinged to the side of the connecting plate away from the fixed plate. A guide is provided at the top of the connecting platform. An elliptical plate is slidably connected to the inner wall of the rotating column. A threaded rod is fixedly connected to the right end of the elliptical plate. A measuring mechanism is provided at the front of the connecting platform.

[0008] As a further description of the above technical solution:

[0009] The guide includes a telescopic rod fixedly connected to the top of the connecting platform, and the top of the movable end of the telescopic rod is fixedly connected to the bottom end of the electric heating roller.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the support platform is slidably connected to the top of the fixed column.

[0012] As a further description of the above technical solution:

[0013] The output end of the motor is fixedly connected to the left end of the connecting platform.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the threaded rod is threadedly connected to the inner wall of the connecting platform.

[0016] As a further description of the above technical solution:

[0017] The bottom of the connecting plate has a groove, and the width of the inner surface of the groove is greater than the width of the fixing plate.

[0018] As a further description of the above technical solution:

[0019] The measuring mechanism includes a measuring tape fixedly connected to the front of the connecting platform, a fixing block fixedly connected to the right end of the base plate, a positioning post fixedly connected to the rear of the fixing block, a connecting post fixedly connected to the bottom of the measuring tape, a positioning hole opened in the middle of the connecting post, the inner diameter of the positioning hole matching the outer diameter of the positioning post, and a spray pipe fixedly connected to the right end of the connecting platform.

[0020] As a further description of the above technical solution:

[0021] A rubber pad is fixedly connected to the rear end of the positioning post.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, through the mutual cooperation between the base plate, spray pipe and drying mechanism, the threaded rod drives the elliptical plate to move, causing the rotating column, fixed plate and connecting plate to move together. With the guidance of the telescopic rod, the electric heating roller can be vertically adjusted to adapt to the size of the welded pipe, and the self-locking property of the threaded rod ensures stable fixation after adjustment. At the same time, the motor drives the connecting table and the electric heating roller to rotate. Combined with the heating function of the electric heating roller, the welded pipe can be preheated and dried in all directions and evenly, reducing the impact of moisture on the spraying quality and providing a good foundation for the subsequent anti-corrosion layer spraying.

[0024] 2. In this utility model, through the cooperation between the measuring mechanism and other structures, the positioning hole of the connecting column is fitted onto the positioning column. The length of the connecting platform and the fixed block is measured with a tape measure. Combined with the length of the universal wheel and the fixed block, it can be quickly determined whether the connecting platform is at the center of the welded pipe. This ensures that the subsequent electric heating roller and spraying pipe can operate with the center of the welded pipe as the center. This effectively improves the equipment's adaptability and adjustment accuracy for welded pipes with different inner diameters, and reduces the time cost of repeated manual debugging. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an automatic anti-corrosion coating equipment for large-diameter welded pipes proposed in this utility model.

[0026] Figure 2 This utility model provides an overall three-dimensional schematic diagram of the connection table of an automatic anti-corrosion coating equipment for large-diameter welded pipes.

[0027] Figure 3 This is a cross-sectional internal schematic diagram of the connecting table of an automatic anti-corrosion coating equipment for large-diameter welded pipes proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the internal cross-section of the rotating column of an automatic anti-corrosion coating equipment for large-diameter welded pipes proposed in this utility model.

[0029] Figure 5 This utility model presents a schematic diagram showing the disassembled measuring tape and positioning column of an automatic anti-corrosion coating equipment for large-diameter welded pipes.

[0030] Legend:

[0031] 1. Base plate; 2. Support platform; 3. Drying mechanism; 301. Electric telescopic rod; 302. Connecting platform; 303. Fixed column; 304. Connecting platform; 305. Rotating column; 306. Fixed plate; 307. Connecting plate; 308. Electric heating roller; 309. Telescopic rod; 310. Threaded rod; 311. Elliptical plate; 4. Motor; 5. Measuring mechanism; 501. Measuring tape; 502. Fixed block; 503. Connecting column; 504. Positioning column; 505. Rubber pad; 6. Spraying pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-2 One embodiment of this utility model is an automatic anti-corrosion coating equipment for large-diameter welded pipes, including a base plate 1, and a drying mechanism 3 is provided at the upper center of the base plate 1; the setting of the drying mechanism 3 enables preheating treatment when drying the welded pipe, thereby improving the quality of the coating.

[0034] Reference Figures 2-4 The drying mechanism 3 includes an electric telescopic rod 301 fixedly connected to the center of the upper part of the base plate 1. A fixed column 303 is fixedly connected to the upper part of the base plate 1. A support platform 2 is fixedly connected to the movable end of the top of the electric telescopic rod 301. Four sets of fixed columns 303 are provided, which can guide and support the support platform 2 when it moves vertically. The movable end of the electric telescopic rod 301 drives the support platform 2 to move. A motor 4 and a connecting platform 302 are fixedly connected to the top of the support platform 2. The motor 4 is located on the left side of the connecting platform 302. A connecting table 304 is rotatably connected through the inner wall of the connecting platform 302. The connecting table 304 can rotate to perform drying and spraying operations. A rotating column 305 is rotatably connected to the inner wall of the connecting platform 304. A fixed plate 306 is fixedly connected to the outer arc surface of the rotating column 305. A connecting plate 307 is hinged to the side of the fixed plate 306 away from the rotating column 305. An electric heating roller 308 is hinged to the side of the connecting plate 307 away from the fixed plate 306. Two sets of fixed plates 306 and connecting plates 307 are provided. The rotation of the rotating column 305 causes the fixed plate 306 to rotate synchronously, thereby causing the connecting plate 307 to move. This allows the electric heating roller 308 to be adjusted to adapt to different welded pipes. The electric heating roller 308 is connected by wires to perform heat treatment. This is existing technology and will not be explained in detail here.

[0035] Furthermore, a guide is provided on the top of the connecting platform 304. The guide facilitates the guidance of the electric heating roller 308, enabling it to move vertically. An elliptical plate 311 is slidably connected to the inner wall of the rotating column 305. A threaded rod 310 is fixedly connected to the right end of the elliptical plate 311. The rotation of the threaded rod 310 can drive the elliptical plate 311 to move synchronously. A measuring mechanism 5 is provided at the front of the connecting platform 304. The measuring mechanism 5 facilitates the manual measurement of the inner radius of the welded pipe, thereby facilitating the movement and adjustment of the electric heating roller 308.

[0036] Reference Figures 2-4 The guide includes a telescopic rod 309 fixedly connected to the top of the connecting platform 304. The top of the movable end of the telescopic rod 309 is fixedly connected to the bottom end of the electric heating roller 308. The telescopic rod 309 ensures that the electric heating roller 308 moves vertically. The inner wall of the support platform 2 is slidably connected to the top of the fixed column 303. The sliding arrangement avoids motion interference. The output end of the motor 4 is fixedly connected to the left end of the connecting platform 304. The rotation of the output end of the motor 4 drives the connecting platform 304 to move synchronously. The outer wall of the threaded rod 310 is threadedly connected to the inner wall of the connecting platform 304. The self-locking property of the threaded rod 310 can fix and limit the rotation column 305. A groove is opened at the bottom of the connecting plate 307. The width of the inner surface of the groove is greater than the width of the fixed plate 306. The groove facilitates the contraction of the fixed plate 306 and the connecting plate 307. The rotation range of the rotation column 305 is sixty degrees.

[0037] Reference Figure 1 , Figure 2 and Figure 5 The measuring mechanism 5 includes a measuring tape 501 fixedly connected to the front of the connecting platform 304. A fixing block 502 is fixedly connected to the right end of the base plate 1, and a positioning post 504 is fixedly connected to the rear of the fixing block 502. The measuring tape 501 can easily measure the length between itself and the fixing block 502. When adjusting the length of the drying mechanism 3, first measure the inner diameter of the welded pipe, then make the length between the measuring tape 501 and the fixing block 502, plus the length between the caster wheel and the fixing block 502, equal to the radius of the inner diameter of the welded pipe. Then, control the electric telescopic rod 301 to adjust it. The measuring tape 501 is a flexible measuring tape. A connecting post 503 is fixedly connected to the bottom. A positioning hole is opened in the middle of the connecting post 503. The inner diameter of the positioning hole matches the outer diameter of the positioning post 504. The flexible ruler is fixed by the matching of the positioning hole and the positioning post 504, which facilitates measurement. A spraying pipe 6 is fixedly connected to the right end of the connecting platform 304. The spraying pipe 6 can spray the welded pipe. A rubber pad 505 is fixedly connected to the rear end of the positioning post 504. The rubber pad 505 ensures that the positioning post 504 will not detach from the connecting post 503 when it is not manually controlled.

[0038] Working principle: First, a measurement operation is performed. The inner radius of the welded pipe is determined by the measuring mechanism 5. The positioning hole on the connecting column 503 is fitted onto the positioning column 504. Then, the electric telescopic rod 301 is started. The length between the connecting platform 304 and the fixed block 502 is measured by the tape measure 501. The length of the universal wheel and the fixed block 502 are then combined. When the lengths of the two match the radius of the inner diameter of the welded pipe, the connecting platform 304 is located at the center of the welded pipe.

[0039] Next, the position of the electric heating roller 308 is adjusted according to the measurement results. The threaded rod 310 is rotated, causing the elliptical plate 311 to slide on the inner wall of the rotating column 305. The movement of the elliptical plate 311 causes the rotating column 305 to rotate, which in turn causes the fixed plate 306 to rotate synchronously. The fixed plate 306 then causes the connecting plate 307 to move. Under the guidance of the telescopic rod 309, the electric heating roller 308 moves vertically to adapt to the size of the welded pipe. Since the threaded connection between the threaded rod 310 and the connecting platform 304 has self-locking properties, the rotating column 305 can be fixed and limited. The electric heating roller 308 is turned on to heat up, and the motor 4 is started. The output end of the motor 4 drives the connecting platform 304 to rotate. The connecting platform 304 then drives the rotating column 305, the fixed plate 306, the connecting plate 307, and the electric heating roller 308 to rotate synchronously. During the rotation, the electric heating roller 308 preheats and dries the welded pipe, preparing it for the subsequent spraying of the anti-corrosion layer.

[0040] During the drying process, the anti-corrosion layer is sprayed onto the welded pipe through the spraying pipe 6. The motor 4 continuously drives the relevant components to rotate, ensuring that the electric heating roller 308 and the spraying pipe 6 can act evenly on the surface of the welded pipe, thus guaranteeing the spraying quality. Throughout the process, the measuring mechanism 5 ensures the accuracy of the adjustment of the electric heating roller 308, and the guide component ensures the stability of the movement of the electric heating roller 308. All components work together to complete the automatic spraying of the anti-corrosion layer onto the large-diameter welded pipe.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic anti-corrosion coating equipment for large-diameter welded pipes, comprising a base plate (1), characterized in that: A drying mechanism (3) is provided at the upper center of the base plate (1); The drying mechanism (3) includes an electric telescopic rod (301) fixedly connected to the center of the upper part of the base plate (1). A fixed column (303) is fixedly connected to the upper part of the base plate (1). A support platform (2) is fixedly connected to the top movable end of the electric telescopic rod (301). A motor (4) and a connecting platform (302) are fixedly connected to the top of the support platform (2). A connecting platform (304) is rotatably connected through the inner wall of the connecting platform (302). A rotating column (305) is rotatably connected to the inner wall of the connecting platform (304). 05) The outer arc surface is fixedly connected to a fixing plate (306), and a connecting plate (307) is hinged to the side of the fixing plate (306) away from the rotating column (305). An electric heating roller (308) is hinged to the side of the connecting plate (307) away from the fixing plate (306). A guide is provided on the top of the connecting platform (304). An elliptical plate (311) is slidably connected to the inner wall of the rotating column (305). A threaded rod (310) is fixedly connected to the right end of the elliptical plate (311). A measuring mechanism (5) is provided at the front of the connecting platform (304).

2. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The guide includes a telescopic rod (309) fixedly connected to the top of the connecting platform (304), and the top of the movable end of the telescopic rod (309) is fixedly connected to the bottom end of the electric heating roller (308).

3. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The inner wall of the support platform (2) is slidably connected to the top of the fixed column (303).

4. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The output end of the motor (4) is fixedly connected to the left end of the connecting platform (304).

5. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The outer wall of the threaded rod (310) is threaded to the inner wall of the connecting platform (304).

6. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The bottom of the connecting plate (307) has a groove, and the width of the inner surface of the groove is greater than the width of the fixing plate (306).

7. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 1, characterized in that: The measuring mechanism (5) includes a measuring tape (501) fixedly connected to the front of the connecting platform (304), a fixing block (502) fixedly connected to the right end of the base plate (1), a positioning post (504) fixedly connected to the rear of the fixing block (502), a connecting post (503) fixedly connected to the bottom of the measuring tape (501), a positioning hole opened in the middle of the connecting post (503), the inner diameter of the positioning hole matching the outer diameter of the positioning post (504), and a spray pipe (6) fixedly connected to the right end of the connecting platform (304).

8. The automatic anti-corrosion coating equipment for large-diameter welded pipes according to claim 7, characterized in that: A rubber pad (505) is fixedly connected to the rear end of the positioning post (504).

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