Steel pipe pile inner wall welding seam spraying device

Abstract

The utility model relates to the field of spraying devices, and discloses a steel pipe pile inner wall welding seam spraying device which comprises a box body, a control panel is arranged at the position, close to one side, of the center of the front end face of the box body, four electric telescopic rods are arranged on the lower end face of the box body in a rectangular mode, and a translation adjusting structure is arranged on the lower inner wall of the box body. A sliding block is arranged on one side of the center of the upper end face of the translation adjusting structure, a fixing block is arranged on the center of the upper end face of the sliding block, and a spraying liquid storage box is arranged on one side of the center of the upper end face of the translation adjusting structure. According to the device, through the spray head, the rotator, the polisher, the connecting plate, the camera, the mounting and placing plate and the air curtain, a weld joint can be observed and positioned, a clear monitoring picture can be provided, an airflow barrier of the air curtain isolates dust and spraying materials in the polishing and spraying process, it is ensured that the camera can continuously provide the clear monitoring picture, and the welding quality is improved. And efficient and accurate treatment of the welding seam in the steel pipe pile is achieved.

Description

Technical Field

[0001] The utility model relates to the field of spraying devices, in particular to a spraying device for the inner wall welds of steel pipe piles. Background Art

[0002] The spraying device for the inner wall welds of steel pipe piles is a device used for the repair and protection of the inner wall welds of steel pipe piles. Steel pipe piles are widely used in fields such as construction, bridges, ports, and ocean engineering. The integrity of the inner wall welds directly affects the structural safety and durability. With the increase of service time, problems such as corrosion and wear may occur in the inner wall welds of steel pipe piles, so repair and protection are required.

[0003] In the existing spraying devices for the inner wall welds of steel pipe piles, the weld positions may not be accurately located, resulting in unsatisfactory treatment effects. Even repeated construction may be required to meet the required standards. This is not only inefficient but also prone to uneven spraying, resulting in uneven coverage or omission of the welds, affecting the quality and durability of the welds. Therefore, those skilled in the art have provided a spraying device for the inner wall welds of steel pipe piles to solve the problems raised in the above background art. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a spraying device for the inner wall welds of steel pipe piles is proposed. Through a spray head, a rotator, a grinder, a connecting plate, a camera, a mounting and placing plate, and an air curtain, the welds can be observed, located, and a clear monitoring picture can be provided. The air curtain's air flow barrier isolates the dust and spraying materials during the grinding and spraying processes, ensuring that the camera can continuously provide a clear monitoring picture, realizing the efficient and precise treatment of the inner welds of steel pipe piles. Through the design of connecting blocks, elastic layers, gaskets, and bearings, the rotating pipe and the output end of the self-priming pump can be effectively connected, and the smooth and stable rotation movement can be ensured. At the same time, the gasket can prevent liquid leakage and protect the safe operation of the equipment. By adopting a frame, a chute, a motor, a lead screw, and a slider, and through an electric telescopic rod, the precise position adjustment of the spraying equipment is realized, thereby controlling the spraying direction. By quickly and conveniently adjusting the height and position of the device, the adjustment time is reduced, and the work efficiency is improved.

[0005] To achieve the above object, the utility model provides the following technical solution: a welding seam spraying device for the inner wall of a steel pipe pile, including a box body. At a position close to one side at the center of the front end face of the box body, there is a control panel. At the lower end face of the box body, four electric telescopic rods are arranged in a rectangular array. A translation adjustment structure is arranged on the lower inner wall of the box body. At a position close to one side at the center of the upper end face of the translation adjustment structure, there is a sliding block. At the center of the upper end face of the sliding block, there is a fixed block. At a position close to one side at the center of the upper end face of the translation adjustment structure, there is a spraying liquid storage box. At the center of the lower inner wall of the spraying liquid storage box, there is a self-priming pump. The output end of the self-priming pump penetrates through one inner side wall of the spraying liquid storage box and communicates with one side wall of a rotary protection structure to reach the inside of the rotary protection structure, and the end is fixedly connected to the rotary protection structure. At one end of the rotary protection structure, there is a rotary pipe. At one end of the rotary pipe, there is a spraying, grinding and monitoring structure;

[0006] Through the above technical solution, through the nozzle, the rotator, the grinder, the connecting plate, the camera, the installation and placement plate and the air curtain, it is possible to observe, position and provide a clear monitoring picture for the welding seam. The air flow barrier of the air curtain isolates the dust and spraying materials during the grinding and spraying processes, ensuring that the camera can continuously provide a clear monitoring picture, realizing the efficient and precise treatment of the inner wall welding seam of the steel pipe pile. By adopting the design of the connecting block, the elastic layer, the sealing gasket and the bearing, it is possible to effectively connect the rotary pipe and the output end of the self-priming pump, and ensure the smooth and stable rotation movement. At the same time, the role of the sealing gasket can prevent liquid leakage and protect the safe operation of the equipment. By adopting the frame, the chute, the motor, the lead screw and the slider, and through the electric telescopic rod, the precise position adjustment of the spraying equipment is realized, thereby controlling the spraying direction. By quickly and conveniently adjusting the height and position of the device, the adjustment time is reduced and the work efficiency is improved.

[0007] Further, the translation adjustment structure includes three frames, three chutes, three motors, three lead screws and three sliders. The three frames are respectively arranged on the lower inner wall of the box body in a front-back arrangement. The three chutes are respectively arranged at the centers of the upper end faces of the three frames. The three motors are respectively arranged at positions close to the upper part at the centers of the side walls of the three frames. The three lead screws are respectively arranged at the centers of the three motors. The three sliders are respectively slidably connected to the outer side walls of the three lead screws. The output ends of the three motors sequentially penetrate through the three frames and communicate with the three chutes to reach the inside of the three chutes, and the ends are respectively fixedly connected to one ends of the lead screws. The sliding block is threadedly sleeved on the outer side wall of the bearing at the center. The spraying liquid storage box is arranged at the center of the upper end faces of the three bearings;

[0008] Through the above technical solution, when it is necessary to spray the weld seam, the rotation of the lead screw is driven by the motor, so that the slider and the sliding block perform translational motion in the chute, realizing precise position adjustment, and then controlling the spraying direction of the spraying equipment, facilitating the spraying of the weld seam, ensuring that the spraying liquid evenly covers the weld seam on the inner wall of the steel pipe pile, thereby improving the accuracy and consistency of spraying.

[0009] Further, the rotary protection structure includes a connecting block, an elastic layer, two sealing gaskets and a bearing. The connecting block is arranged at the center of the upper end surface of the sliding block. The elastic layer is sleeved on the inner side wall of the connecting block. The two sealing gaskets are respectively arranged at one end of the rotary pipe and the output end of the self-priming pump. The bearing is arranged at the center of one side wall of the two sealing gaskets.

[0010] Through the above technical solution, the rotary pipe is connected to the output end of the self-priming pump through the connecting block, and the elastic layer is used to reduce vibration transmission and friction. The sealing gasket plays a sealing role to prevent the leakage of the spraying material. At the same time, the bearing supports the rotary motion to ensure the smoothness and stability of rotation, which can protect the safe operation of the equipment, prevent external impurities and liquids from entering the inside of the rotary pipe, and avoid equipment damage and liquid pollution.

[0011] Further, the spraying, grinding and monitoring structure includes a spray head, a rotator, a grinder, a connecting plate, a camera, a mounting and placing plate and an air curtain. The spray heads are arranged in a row at the center of the lower end surface of the rotary pipe. The output end of the rotator is fixedly connected to one end of the rotary pipe. The grinder is arranged on the rotary pipe at one end of the output end of the rotator. The connecting plate is arranged at the center of one side wall of the rotator. The mounting and placing plate is arranged at the upper part of the center of one side wall of the connecting plate. The camera is arranged at the center of the lower end surface of the mounting and placing plate. The air curtain is arranged at the center of the lower end surface of the connecting plate.

[0012] Through the above technical solution, before grinding and spraying, the operator first observes the inner wall weld of the steel pipe pile through a camera, especially accurately locates the position of the weld. After determining the weld position, the air curtain is activated to form an air flow barrier. The main function of this air flow barrier is to isolate the dust and spraying materials generated during the grinding and spraying processes, prevent them from contaminating or damaging the camera, and ensure that the camera can continuously provide clear monitoring images. The rotator provides rotational power to drive the grinder to perform grinding operations. The grinder grinds the weld to remove excess materials and uneven parts on the weld surface, ensuring the smoothness and strength of the weld. After grinding, the rotating pipe transports the coating to the nozzle, and the nozzle sprays the processed weld inside the steel pipe pile to cover and protect the weld, improving its corrosion resistance and extending its service life. During the entire grinding and spraying processes, the camera continuously monitors the spraying effect of the nozzle and the grinding situation of the grinder, realizing efficient and precise treatment of the inner wall weld of the steel pipe pile and ensuring its structural integrity and functionality.

[0013] Further, heaters are provided at both the front and rear of the center of the lower inner wall of the spraying liquid storage tank.

[0014] Through the above technical solution, the quality of the coating is improved and the coating speed is accelerated. At the same time, it also helps to reduce bubbles and defects in the coating.

[0015] Further, a liquid inlet is provided at the center of the upper end face of the spraying liquid storage tank.

[0016] Through the above technical solution, the operator can conveniently inject new spraying liquid, ensuring continuous liquid supply, avoiding the operation of frequent shutdown for liquid replacement, and improving production efficiency.

[0017] Further, the materials of both the two sealing gaskets and the elastic layer are rubber.

[0018] Through the above technical solution, the rubber material has good sealing performance and wear resistance, can effectively prevent liquid or gas leakage, and at the same time reduces the vibration transmission during the operation of the device, protecting the stability and service life of the equipment and components.

[0019] Further, the material of the rotating pipe is stainless steel.

[0020] Through the above technical solution, the rotating pipe made of stainless steel has good durability and stability, can resist chemical corrosion and mechanical wear, extends the service life of the equipment, reduces the maintenance cost and improves the work efficiency.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, the welding seam spraying device on the inner wall of the steel pipe pile can observe, position and provide a clear monitoring picture for the welding seam through a nozzle, a rotator, a grinder, a connecting plate, a camera, a mounting plate and an air curtain. The air curtain's air flow barrier isolates the dust and spraying materials during the grinding and spraying processes, ensuring that the camera can continuously provide a clear monitoring picture and achieving efficient and precise processing of the inner wall welding seam of the steel pipe pile.

[0023] 2. In the present utility model, through the design of using a connecting block, an elastic layer, a gasket and a bearing, the rotating pipe and the output end of the self-priming pump can be effectively connected, and the smooth and stable rotation movement can be ensured. At the same time, the function of the gasket can prevent liquid leakage and protect the safe operation of the equipment.

[0024] 3. In the present utility model, by using a frame, a chute, a motor, a lead screw and a slider, and through an electric telescopic rod, precise position adjustment of the spraying device is achieved, thereby controlling the spraying direction. By quickly and conveniently adjusting the height and position of the device, the adjustment time is reduced and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of the welding seam spraying device on the inner wall of the steel pipe pile proposed by the present utility model;

[0026] Figure 2 is a front sectional view of the welding seam spraying device on the inner wall of the steel pipe pile proposed by the present utility model;

[0027] Figure 3 is a side view of the welding seam spraying device on the inner wall of the steel pipe pile proposed by the present utility model;

[0028] Figure 4 is Figure 2 an enlarged schematic view of part A in

[0029] LEGEND DESCRIPTION:

[0030] 1. Box body; 2. Control panel; 3. Electric telescopic rod; 4. Translation adjustment structure; 401. Frame; 402. Chute; 403. Motor; 404. Lead screw; 405. Slider; 5. Rotating protection structure; 501. Connecting block; 502. Elastic layer; 503. Gasket; 504. Bearing; 6. Fixed block; 7. Rotating pipe; 8. Spraying, grinding and monitoring structure; 801. Nozzle; 802. Rotator; 803. Grinder; 804. Connecting plate; 805. Camera; 806. Mounting plate; 807. Air curtain; 9. Spraying liquid storage tank; 10. Heater; 11. Self-priming pump; 12. Liquid inlet; 13. Sliding block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Referring to Figures 1-4 , an embodiment provided by the present utility model: a welding seam spraying device for the inner wall of a steel pipe pile, including a box body 1. A control panel 2 is provided at a position near one side of the center of the front end face of the box body 1. Four electric telescopic rods 3 are arranged in a rectangular array on the lower end face of the box body 1. A translation adjustment structure 4 is provided on the lower inner wall of the box body 1. A sliding block 13 is provided at a position near one side of the center of the upper end face of the translation adjustment structure 4. A fixing block 6 is provided at the center of the upper end face of the sliding block 13. A spraying liquid storage box 9 is provided at a position near one side of the center of the upper end face of the translation adjustment structure 4. A self-priming pump 11 is provided at the center of the lower inner wall of the spraying liquid storage box 9. The output end of the self-priming pump 11 penetrates through an inner side wall of the spraying liquid storage box 9 and communicates with one side wall of a rotary protection structure 5 to reach the inside of the rotary protection structure 5, and the end is fixedly connected to the rotary protection structure 5. One end of the rotary protection structure 5 is provided with a rotary pipe 7. One side end of the rotary pipe 7 is provided with a spraying, grinding and monitoring structure 8.

[0033] When the operator starts the device, the control panel 2 is used to set and monitor spraying parameters, such as temperature, pressure, etc. The height of the spraying device is adjusted through the electric telescopic rods 3 to adapt to steel pipe piles of different lengths. After the height is adjusted to a suitable position, the spraying liquid storage box 9 and the spraying, grinding and monitoring structure 8 are allowed to perform translation adjustment along the inner wall of the steel pipe pile through the translation adjustment structure 4 and the sliding block 13 to ensure that the entire inner wall of the steel pipe pile can be covered. The self-priming pump 11 is responsible for sucking the spraying liquid out of the spraying liquid storage box 9 and transporting it to the inside of the rotary protection structure 5. The spraying liquid is evenly sprayed on the inner wall of the steel pipe pile through the rotary pipe 7 of the rotary protection structure 5 through the spraying, grinding and monitoring structure 8. Through precise mechanical structures and intelligent control, efficient, uniform and safe spraying operations are achieved, significantly improving the spraying efficiency and coating quality. Heaters 10 are provided at the front and rear positions near the center of the lower inner wall of the spraying liquid storage box 9 to improve the coating quality and accelerate the coating speed, and also help to reduce bubbles and defects in the coating. A liquid inlet 12 is provided at the center of the upper end face of the spraying liquid storage box 9, allowing the operator to conveniently inject new spraying liquid to ensure continuous liquid supply, avoiding the operation of frequent shutdown for liquid replacement and improving production efficiency. The rotary pipe 7 is made of stainless steel. The stainless steel rotary pipe 7 has good durability and stability, can resist chemical corrosion and mechanical wear, extends the service life of the equipment, reduces the maintenance cost and improves the work efficiency.

[0034] The translation adjustment structure 4 includes three frames 401, three chutes 402, three motors 403, three lead screws 404 and three sliders 405. The three frames 401 are arranged in sequence front and back on the lower inner wall of the box body 1. The three chutes 402 are respectively arranged at the centers of the upper end faces of the three frames 401. The three motors 403 are respectively arranged at the upper centers of one side walls of the three frames 401. The three lead screws 404 are respectively arranged at the centers of the interiors of the three motors 403. The three sliders 405 are respectively slidably connected to the outer side walls of the three lead screws 404. The output ends of the three motors 403 sequentially penetrate through the three frames 401 and communicate with the three chutes 402 to reach the interiors of the three chutes 402, and the ends are respectively fixedly connected to one end of the lead screw 404. The sliding block 13 is threadedly sleeved on the outer side wall of the bearing 504 at the center. The spraying liquid storage tank 9 is arranged at the center of the upper end face of the three bearings 504. When it is necessary to spray the weld, the rotation of the lead screw 404 is driven by the motor 403, so that the slider 405 and the sliding block 13 perform translational motion in the chute 402, realizing precise position adjustment, and then controlling the spraying direction of the spraying device, facilitating the spraying of the weld, and ensuring that the spraying liquid evenly covers the weld on the inner wall of the steel pipe pile, thereby improving the accuracy and consistency of spraying.

[0035] The rotation protection structure 5 includes a connecting block 501, an elastic layer 502, two gaskets 503 and a bearing 504. The connecting block 501 is arranged at the center of the upper end face of the sliding block 13. The elastic layer 502 is sleeved on the inner side wall of the connecting block 501. The two gaskets 503 are respectively arranged at one end of the rotating pipe 7 and the output end of the self-priming pump 11. The bearing 504 is arranged at the center of one side wall of the two gaskets 503. The rotating pipe 7 and the output end of the self-priming pump 11 are connected through the connecting block 501, and the elastic layer 502 is used to reduce vibration transmission and friction. The gasket 503 plays a sealing role to prevent the leakage of the spraying material. At the same time, the bearing 504 supports the rotational movement, ensuring smooth and stable rotation, protecting the safe operation of the equipment, and preventing external impurities and liquids from entering the interior of the rotating pipe 7, avoiding equipment damage and liquid pollution. The materials of the two gaskets 503 and the elastic layer 502 are both rubber. The rubber material has good sealing performance and wear resistance, can effectively prevent the leakage of liquid or gas, and at the same time reduces the vibration transmission during the operation of the device, protecting the stability and service life of the equipment and components.

[0036] The spraying and grinding monitoring structure 8 includes a spray head 801, a rotator 802, a grinder 803, a connecting plate 804, a camera 805, a mounting and placement plate 806, and an air curtain 807. The spray heads 801 are arranged in a column at the center of the lower end face of the rotating pipe 7. The output end of the rotator 802 is fixedly connected to one end of the rotating pipe 7. The grinder 803 is arranged on one end of the rotating pipe 7 at the output end of the rotator 802. The connecting plate 804 is arranged at the center of one side wall of the rotator 802. The mounting and placement plate 806 is arranged at the center of the upper part of one side wall of the connecting plate 804. The camera 805 is arranged at the center of the lower end face of the mounting and placement plate 806. The air curtain 807 is arranged at the center of the lower end face of the connecting plate 804. Before grinding and spraying, the operator first observes the inner wall weld of the steel pipe pile through the camera 805, especially accurately locates the position of the weld. After determining the weld position, the air curtain 807 is activated to form an air flow barrier. The main function of this air flow barrier is to isolate the dust and spraying materials generated during the grinding and spraying processes, preventing them from contaminating or damaging the camera 805, and ensuring that the camera 805 can continuously provide clear monitoring images. The rotator 802 provides rotational power to drive the grinder 803 to perform grinding operations. The grinder 803 grinds the weld to remove the excess materials and uneven parts on the weld surface, ensuring the smoothness and strength of the weld. After grinding, the rotating pipe 7 transports the coating to the spray head 801, and the spray head 801 sprays the processed weld inside the steel pipe pile to cover and protect the weld, improving its corrosion resistance and extending its service life. During the entire grinding and spraying processes, the camera 805 continuously monitors the spraying effect of the spray head 801 and the grinding condition of the grinder 803, realizing the efficient and precise treatment of the inner wall weld of the steel pipe pile, and ensuring its structural integrity and functionality.

[0037] Working principle: When the operator starts the device, the control panel 2 is used to set and monitor spraying parameters such as temperature, pressure, etc. The operator injects new spraying liquid through the liquid inlet 12 to ensure continuous liquid supply, avoiding the operation of frequent shutdowns for liquid replacement, improving production efficiency. The height of the spraying device is adjusted by the electric telescopic rod 3 to adapt to steel pipe piles of different lengths. After the height is adjusted to the appropriate position, the rotation of the lead screw 404 is driven by the motor 403, so that the slider 405 and the sliding block 13 perform translational motion in the chute 402 to achieve precise position adjustment, and then control the spraying direction of the spraying equipment, facilitating the spraying of its welds, ensuring that the spraying liquid evenly covers the welds on the inner wall of the steel pipe pile, thereby improving the accuracy and consistency of spraying. The self-priming pump 11 is responsible for sucking the spraying liquid from the spraying liquid storage tank 9 and transporting it into the rotating pipe 7. The rotating pipe 7 is connected to the output end of the self-priming pump 11 through the connecting block 501, and the elastic layer 502 is used to reduce vibration transmission and friction. The gasket 503 plays a sealing role to prevent the leakage of the spraying material. At the same time, the bearing 504 supports the rotational movement to ensure smooth and stable rotation, which can protect the safe operation of the equipment and prevent external impurities and liquids from entering the rotating pipe 7, avoiding equipment damage and liquid pollution.

[0038] Before grinding and spraying, the operator first observes the welds on the inner wall of the steel pipe pile through the camera 805, especially accurately locates the positions of the welds. After determining the weld positions, the air curtain 807 is activated to form an air flow barrier. The main function of this air flow barrier is to isolate the dust and spraying materials generated during the grinding and spraying processes to prevent them from contaminating or damaging the camera 805, ensuring that the camera 805 can continuously provide clear monitoring images. The rotator 802 provides rotational power to drive the grinder 803 to perform grinding operations. The grinder 803 grinds the welds to remove the excess materials and uneven parts on the weld surface to ensure the smoothness and strength of the welds. After grinding, the spraying material is transported through the output end of the self-priming pump 11 into the connected rotating pipe 7, and then the rotating pipe 7 transports the coating to the nozzle 801. The nozzle 801 sprays the processed welds inside the steel pipe pile to cover and protect the welds, improving their corrosion resistance and extending their service life. During the entire grinding and spraying processes, the camera 805 continuously monitors the spraying effect of the nozzle 801 and the grinding situation of the grinder 803 to achieve efficient and precise processing of the welds inside the steel pipe pile, ensuring its structural integrity and functionality.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are 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 recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A steel pipe pile inner wall weld spraying device, comprising a box (1), characterized in that: A control panel (2) is provided at one side of the center of the front end face of the box body (1); four electric telescopic rods (3) are arranged in a rectangular shape at the lower end face of the box body (1); a translation adjustment structure (4) is provided at the lower inner wall of the box body (1); a sliding block (13) is provided at one side of the center of the upper end face of the translation adjustment structure (4); a fixed block (6) is provided at the center of the upper end face of the sliding block (13); a spray liquid storage box (9) is provided at one side of the center of the upper end face of the translation adjustment structure (4); a self-priming pump (11) is provided at the center of the lower inner wall of the spray liquid storage box (9); an output end of the self-priming pump (11) passes through an inner wall of the spray liquid storage box (9) and a side wall of the rotating protective structure (5) to the inside of the rotating protective structure (5), and an end portion is fixedly connected to the rotating protective structure (5); a rotating tube (7) is provided at one end of the rotating protective structure (5); a spraying and polishing monitoring structure (8) is provided at one end of the rotating tube (7).

2. The steel pipe pile inner wall weld spraying device according to claim 1 is characterized in that: The translation adjustment structure (4) comprises three frames (401), three slide grooves (402), three motors (403), three screw rods (404) and three sliders (405); the three frames (401) are arranged in a front-to-back arrangement on the lower inner wall of the box body (1); the three slide grooves (402) are arranged at the center of the upper end surfaces of the three frames (401); the three motors (403) are arranged at the upper center of one side wall of the three frames (401); the three screw rods (404) are arranged at the upper center of the three side walls of the three frames (401); At the inner center of a motor (403), the three sliders (405) are respectively slidably connected to the outer walls of the three screw rods (404), the output ends of the three motors (403) sequentially pass through the three frames (401) and the three slide grooves (402) to the inside of the three slide grooves (402), and the ends are respectively fixedly connected to one end of the screw rod (404), the sliding block (13) is threadedly sleeved on the outer wall of the bearing (504) at the center, and the spray liquid storage box (9) is set at the center of the upper end surface of the three bearings (504).

3. The steel pipe pile inner wall weld spraying device according to claim 1, characterized in that: The rotary protection structure (5) comprises a connecting block (501), an elastic layer (502), two sealing pads (503) and a bearing (504); the connecting block (501) is arranged at the center of the upper end surface of the sliding block (13); the elastic layer (502) is sleeved on the inner wall of the connecting block (501); the two sealing pads (503) are respectively arranged on one end of the rotary tube (7) and the output end of the self-priming pump (11); and the bearing (504) is arranged at the center of one side wall of the two sealing pads (503).

4. The steel pipe pile inner wall weld spraying device according to claim 1, characterized in that: The spraying and grinding monitoring structure (8) comprises a spray head (801), a rotator (802), a grinder (803), a connecting plate (804), a camera (805), a mounting plate (806) and an air curtain (807); the spray head (801) is arranged at the center of the lower end surface of the rotating tube (7); the output end of the rotator (802) is fixedly connected to one end of the rotating tube (7); the grinder (803) is arranged on one end of the rotating tube (7) at the output end of the rotator (802); the connecting plate (804) is arranged at the center of one side wall of the rotator (802); the mounting plate (806) is arranged at the upper center of one side wall of the connecting plate (804); the camera (805) is arranged at the center of the lower end surface of the mounting plate (806); and the air curtain (807) is arranged at the center of the lower end surface of the connecting plate (804).

5. The steel pipe pile inner wall weld spraying device according to claim 1, characterized in that: Heaters (10) are provided at the front and rear of the center of the lower inner wall of the spray liquid storage box (9).

6. The steel pipe pile inner wall weld spraying device according to claim 1, characterized in that: A liquid inlet (12) is provided at the center of the upper end surface of the spray liquid storage box (9).

7. The steel pipe pile inner wall weld spraying device according to claim 3, characterized in that: The two sealing pads (503) and the elastic layer (502) are both made of rubber.

8. The steel pipe pile inner wall weld spraying device according to claim 1, characterized in that: The rotating tube (7) is made of stainless steel.

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