Sand blasting treatment device for weld joints on inner wall of steel pipe pile

Abstract

The utility model relates to the technical field of welding seam sand blasting, and discloses a steel pipe pile inner wall welding seam sand blasting treatment device which comprises a sand blasting box body, a control panel, a filter and a sand adjusting valve, a retracting and releasing device is arranged at the lower position of the center of the front end face of the sand blasting box body, and a supporting box is arranged at the front end of the retracting and releasing device. A camera device is arranged at the position, close to one side, of the center in the supporting box, a moving device is arranged at the position, close to the other side, of the center in the supporting box, the outer side of the output end of the folding and unfolding device is sleeved with a bearing, an output pipe is arranged at the center of the outer side of an outer ring of the bearing, and a second rotating motor is arranged on one side of the output pipe; sand blasting heads are arranged at the positions, close to the two sides, of the center of the front end face of the supporting box, and a dust removal device is arranged at the center of the upper end face of the supporting box. According to the sand blasting machine, generation and diffusion of dust are effectively restrained through the dust removal device, the dust is prevented from affecting the surrounding environment and the health of operators, and therefore the safety and the environmental protection performance of sand blasting operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of weld sandblasting, in particular to a device for sandblasting the inner wall weld of a steel pipe pile. Background Art

[0002] The sandblasting device for the inner wall weld of steel pipe piles is a device used for surface treatment of the internal welds of steel pipe piles. Steel pipe piles usually undergo a welding process to weld steel plates into a tubular form. The inner wall after welding may have defects such as welding slag, oxide scale, and pores. These defects will reduce the strength and durability of the steel pipe piles. Therefore, the weld sandblasting device is required to enter the inner wall of the steel pipe pile for surface treatment to ensure quality and performance.

[0003] When the current sandblasting device for the inner wall weld of a steel pipe pile is in use, it needs to enter the interior of the steel pipe pile, so the sandblasting device requires a longer connecting pipe. Moreover, since the connecting pipe of the sandblasting device is too long, it is easy for the operator to have difficulty in retracting and releasing it, which slows down the work progress and reduces the efficiency of the sandblasting work. During the sandblasting process, the sandblasting device will crush the residue on the inner wall of the steel pipe pile into fine particles, thereby generating a large amount of fine dust particles, which easily leads to the generation and diffusion of dust, affecting the surrounding environment and the health of the operators, thereby reducing the safety and environmental protection performance of the sandblasting operation. Therefore, a technician in this field provides a sandblasting device for the inner wall weld of a steel pipe pile to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and the proposed device for sandblasting the weld seam on the inner wall of a steel pipe pile can better recover and release its connecting pipes through the setting of a retracting device, which is convenient for operators to retract and release the connecting pipes, reduces the working difficulty, and thus improves working efficiency. Then, through the setting of a moving device, it can better control the movement of the device on the inner wall of the steel pipe pile, and then through the coordinated use with the camera device, it can accurately control the positioning of the device, thereby realizing precise sandblasting operations. Finally, through the setting of a dust removal device, it can effectively suppress the generation and diffusion of dust, avoid dust affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of sandblasting operations.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sandblasting treatment device for the inner wall weld of a steel pipe pile, comprising a sandblasting box, a control panel, a filter and a sand regulating valve, wherein the control panel is arranged at the center of one side of the sandblasting box, the filter is arranged at the upper center of the other side of the sandblasting box, the sand regulating valve is arranged at the center of the lower end face of the sandblasting box, a retracting device is arranged at the lower center of the front end face of the sandblasting box, a support box is arranged at the front end of the retracting device, a camera device is arranged at one side of the inner center of the support box, support rods are arranged at the front of both sides of the lower end face of the support box, a support oblique rod is arranged at the rear of the lower end face of the support box, a caster is arranged at the center of the lower end of the support oblique rod, a moving device is arranged at the other side of the inner center of the support box, a bearing is sleeved on the outer side of the output end of the retracting device, an output pipe is arranged at the outer center of the outer ring of the bearing, a second rotating motor is arranged on one side of the output pipe, sandblasting heads are arranged at both sides of the center of the front end face of the support box, and a dust removal device is arranged at the center of the upper end face of the support box;

[0006] Through the above technical solution, by setting up the dust removal device, it is possible to effectively suppress the generation and diffusion of dust, avoid the dust from affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of the sandblasting operation.

[0007] Furthermore, the retracting and releasing device includes two support plates, a first rotating motor, a rotating interface, a first rotating shaft and a connecting pipe, the two support plates are respectively arranged at the lower sides of the front end surface of the sandblasting box body, the first rotating motor is arranged at the center of one side of the support plate on one side, and the output end passes through a side wall of the support plate on one side to pass to the other side wall of the support plate on one side, the first rotating shaft is arranged at the output end of the first rotating motor, the rotating interface is arranged at one end of the first rotating shaft, and the input end passes through a side wall of the support plate on the other side to pass to the other side of the support plate on the other side, the input end of the rotating interface is through-connected with the output end of the sand regulating valve, the output end of the rotating interface passes through a side wall of the first rotating shaft to pass to the inside of the first rotating shaft, the connecting pipe is rotatably connected at the output end of the rotating interface, and is wound and connected at the outside of the first rotating shaft, and the output end of the connecting pipe passes through the rear end surface of the support box to pass to the inside of the support box;

[0008] Through the above technical scheme, the stability of the device is guaranteed by the supporting effect of the support plate, and the first rotating shaft is driven to rotate by the first rotating motor, and then through the connection of the rotating interface, it is guaranteed that one end connected to the output end of the sand regulating valve does not rotate, and the other end rotates at the connection with the first rotating shaft, so that the circulation between the connecting pipe and the sand regulating valve is satisfied, and the winding setting of the connecting pipe is satisfied, so that the connecting pipe can be better recovered and released, which is convenient for the operator to retract and release the connecting pipe, reduces the difficulty of work, and thus improves spraying and work efficiency.

[0009] Furthermore, the moving device includes a driving motor, a second rotating shaft and two rotating wheels, the driving motor is arranged at one side of the center of the support box, the second rotating shaft is arranged at the lower end of the center between the two support rods, and the two ends respectively penetrate the one side wall of the two support rods to the other side wall of the two support rods, the upper end of the support rod on one side penetrates the lower end surface of the support box to the lower inner wall of the support box, and the two rotating wheels are respectively arranged at the two ends of the second rotating shaft;

[0010] Through the above technical solution, the second rotating shaft is driven to rotate by the driving motor, so that the second rotating shaft drives the rotating wheel to roll, thereby satisfying the movement of the device.

[0011] Furthermore, a transmission wheel is provided at one side of the output end of the driving motor and the outer center of the second rotating shaft, and a transmission belt is provided on the outer sides of the two transmission wheels;

[0012] Through the above technical solution, a driving motor drives a transmission wheel, and then drives another transmission wheel through a transmission belt, which then drives the second rotating shaft to rotate, which can better control the device to move on the inner wall of the steel pipe pile.

[0013] Further, the dust removal device includes a water tank, a water inlet, a water pump and a nozzle, the water tank is arranged at the upper end surface of the support box, the water inlet is arranged at one side of the center of the upper end surface of the water tank, the water pump is arranged at the other side of the center of the upper end surface of the support box, and the input end passes through the water tank to the inside of the water tank, the nozzle is arranged at the front end of the center of the upper end surface of the water tank, and the input end is connected with the output end of the water pump;

[0014] Through the above technical scheme, water resources can be stored in the water tank through the water inlet, and then the water resources are pumped out by the water pump, introduced into the nozzle, and then sprayed by the nozzle, so that the generation and spread of dust can be effectively suppressed, avoiding the dust from affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of the sandblasting operation.

[0015] Furthermore, the filter input end passes through one side of the sandblasting box body and reaches the inside of the sandblasting box body, and the output end is connected to the input end of the sand regulating valve;

[0016] Through the above technical solution, the filter is penetrated and then connected with the sand regulating valve, so that the flowability of the device is improved.

[0017] Furthermore, the output end of the camera device passes through the front inner wall of the support box and reaches the front end surface of the support box;

[0018] Through the above technical solution, the camera device allows the operator to observe the inner wall of the steel pipe pile, so that the operator can accurately control the positioning of the device, thereby achieving accurate sandblasting operations.

[0019] Furthermore, the output end of the second rotating motor is connected to the outer side of one end of the output tube by a gear transmission, the output end of the output tube passes through the front inner wall of the support box to the front end surface of the support box, and the output end is connected to the input ends of the two sandblasting heads;

[0020] Through the above technical solution, the output end of the second rotating motor is connected to the output pipe through gear transmission, and is connected to the sandblasting head through a through connection, so that the rotation of the sandblasting head is satisfied, thereby improving the processing effect.

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

[0022] 1. In the utility model, when the sandblasting treatment device for the inner wall weld of the steel pipe pile is used, the setting of the retracting and releasing device enables the connecting pipe to be better recovered and released, which facilitates the operator to retract and release the connecting pipe, reduces the working difficulty, and thus improves the spraying and working efficiency.

[0023] 2. In the utility model, the dust removal device is provided to effectively suppress the generation and diffusion of dust, thereby preventing the dust from affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of the sandblasting operation.

[0024] 3. In the utility model, by setting up the moving device, it is possible to better control the movement of the device on the inner wall of the steel pipe pile, and then by coordinating with the camera device, it is possible to accurately control the positioning of the device, thereby achieving accurate sandblasting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of the sandblasting treatment device for the inner wall weld of a steel pipe pile proposed by the utility model;

[0026] Figure 2 This is a front cross-sectional view of the sandblasting treatment device for the inner wall weld of a steel pipe pile proposed by the utility model;

[0027] Figure 3 It is a front view cross-sectional view of the dust removal device of the sandblasting treatment device for the inner wall weld of the steel pipe pile proposed by the utility model;

[0028] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0029] Legend:

[0030] 1. Sandblasting box; 2. Control panel; 3. Filter; 4. Sand regulating valve; 5. Retracting and releasing device; 501. Support plate; 502. First rotating motor; 503. Rotating interface; 504. First rotating shaft; 505. Connecting pipe; 6. Support box; 7. Camera device; 8. Support rod; 9. Moving device; 901. Driving motor; 902. Second rotating shaft; 903. Rotating wheel; 904. Transmission wheel; 905. Transmission belt; 10. Support diagonal rod; 11. Bearing; 12. Output pipe; 13. Second rotating motor; 14. Sandblasting head; 15. Dust removal device; 1501. Water tank; 1502. Water inlet; 1503. Water pump; 1504. Sprinkler; 16. Casters. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-4 The utility model provides an embodiment: a sandblasting treatment device for the inner wall weld of a steel pipe pile, comprising a sandblasting box 1, a control panel 2, a filter 3 and a sand regulating valve 4. The control panel 2 is arranged at the center of one side of the sandblasting box 1, and the filter 3 is arranged at the upper center of the other side of the sandblasting box 1. The filter 3 is penetrated through the filter 3 and then passes through the filter 3 and the sand regulating valve 4, so that the fluidity of the device is improved. The sand regulating valve 4 is arranged at the center of the lower end surface of the sandblasting box 1, and a retracting device 5 is arranged at the lower center of the front end surface of the sandblasting box 1. Through the arrangement of the retracting device 5, it is possible to better recover and release its connecting pipe 505, which is convenient for the operator to retract and release the connecting pipe 505, reduces the difficulty of work, and thus improves the spraying and work efficiency. A support box 6 is arranged at the front end of the retracting device 5, and a camera device 7 is arranged at one side of the center of the support box 6. Support rods 8 are arranged at the front of both sides of the lower end surface of the support box 6.

[0033] A supporting diagonal rod 10 is provided at the rear center of the lower end face of the supporting box 6, and a caster 16 is provided at the center of the lower end of the supporting diagonal rod 10. A moving device 9 is provided at the other side of the inner center of the supporting box 6. Through the setting of the moving device 9, it is possible to better control the movement of the device on the inner wall of the steel pipe pile, and then through the cooperation with the camera device 7, it is possible to accurately control the positioning of the device, thereby realizing precise sandblasting operation. A bearing 11 is provided on the outer side of the output end of the retracting device 5, and an output pipe 12 is provided at the outer center of the outer ring of the bearing 11. A second rotating motor 13 is provided on one side of the output pipe 12. Sandblasting heads 14 are provided on both sides of the center of the front end face of the supporting box 6, and a dust removal device 15 is provided at the center of the upper end face of the supporting box 6. Through the setting of the dust removal device 15, it can effectively suppress the generation and diffusion of dust, avoid dust affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of the sandblasting operation.

[0034] The retracting device 5 includes two support plates 501, a first rotating motor 502, a rotating interface 503, a first rotating shaft 504 and a connecting pipe 505. The two support plates 501 are respectively arranged at the lower sides of the front end surface of the sandblasting box 1. The first rotating motor 502 is arranged at the center of one side of the support plate 501 on one side, and the output end passes through the side wall of the support plate 501 on one side to the other side wall of the support plate 501 on one side. The first rotating shaft 504 is arranged at the output end of the first rotating motor 502. The rotating interface 503 is arranged at one end of the first rotating shaft 504, and the input end passes through the side wall of the support plate 501 on the other side to the other side of the support plate 501 on the other side. The input end of the rotating interface 503 is connected with the output end of the sand regulating valve 4, and the output end of the rotating interface 503 passes through the side wall of the first rotating shaft 504 to the first rotating shaft 504 Inside, the connecting pipe 505 is rotatably connected to the output end of the rotating interface 503, and is wound and connected to the outside of the first rotating shaft 504. The output end of the connecting pipe 505 passes through the rear end face of the support box 6 to the inside of the support box 6. The support of the support plate 501 ensures the stability of the device, and then the first rotating shaft 504 is driven to rotate by the first rotating motor 502. Then, through the connection of the rotating interface 503, it is ensured that one end connected to the output end of the sand regulating valve 4 does not rotate, and the other end connected to the first rotating shaft 504 rotates, so that the circulation between the connecting pipe 505 and the sand regulating valve 4 is satisfied, and the winding setting of the connecting pipe 505 is satisfied, so that the connecting pipe 505 can be better recovered and released, which is convenient for the operator to retract and release the connecting pipe 505, reduces the difficulty of work, and thus improves spraying and work efficiency.

[0035] The moving device 9 includes a driving motor 901, a second rotating shaft 902 and two rotating wheels 903. The driving motor 901 is arranged at one side of the center of the support box 6. The second rotating shaft 902 is arranged at the lower end of the center between the two support rods 8, and the two ends respectively penetrate the one side wall of the two support rods 8 to the other side wall of the two support rods 8. The upper end of the support rod 8 on one side penetrates the lower end surface of the support box 6 to the lower inner wall of the support box 6. The two rotating wheels 903 are respectively arranged at the two ends of the second rotating shaft 902. 1 drives the second rotating shaft 902 to rotate, so that it drives the rotating wheel 903 to roll, so that it satisfies the movement of the device. A transmission wheel 904 is provided at the output end of the driving motor 901 and the outer center of the second rotating shaft 902 on one side. A transmission belt 905 is sleeved on the outer side of the two transmission wheels 904. The driving motor 901 drives one transmission wheel 904, and then drives the other transmission wheel 904 through the transmission belt 905, and then drives the second rotating shaft 902 to rotate, which can better control the device to move on the inner wall of the steel pipe pile.

[0036] The dust removal device 15 includes a water tank 1501, a water inlet 1502, a water pump 1503 and a nozzle 1504. The water tank 1501 is arranged at the upper end surface of the support box 6, the water inlet 1502 is arranged at one side of the center of the upper end surface of the water tank 1501, the water pump 1503 is arranged at the other side of the center of the upper end surface of the support box 6, and the input end passes through the water tank 1501 to the inside of the water tank 1501, the nozzle 1504 is arranged at the front end of the center of the upper end surface of the water tank 1501, and the input end is connected with the output end of the water pump 1503. Water resources can be stored in the inside of the water tank 1501 through the water inlet 1502, and then the water resources are pumped out by the water pump 1503 and introduced into the nozzle 1504, and then sprayed by the nozzle 1504, so that it can effectively suppress the generation and diffusion of dust, avoid dust affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of sandblasting operations.

[0037] The input end of the filter 3 passes through one side of the sandblasting box 1 and reaches the inside of the sandblasting box 1, and the output end is connected with the input end of the sand regulating valve 4. The filter 3 passes through the filter 3 and then passes through the filter 3 and the sand regulating valve 4, so that the fluidity of the device is improved. The output end of the camera device 7 passes through the front inner wall of the support box 6 and reaches the front end face of the support box 6. The camera device 7 is convenient for the operator to observe the inner wall of the steel pipe pile, so that the operator can accurately control the positioning of the device, thereby realizing accurate sandblasting operation. The output end of the second rotating motor 13 is connected with the outer side of one end of the output pipe 12 through a gear transmission. The output end of the output pipe 12 passes through the front inner wall of the support box 6 and reaches the front end face of the support box 6, and the output end is connected with the input ends of the two sandblasting heads 14 through a gear transmission connection. The output end of the second rotating motor 13 is connected with the output pipe 12 through a gear transmission connection, and is connected with the sandblasting head 14 through a through connection, so that the rotation of the sandblasting head 14 is satisfied, thereby improving the treatment effect.

[0038] Working principle: When the sandblasting treatment device for the weld on the inner wall of a steel pipe pile is in use, a transmission wheel 904 is driven by a driving motor 901, and another transmission wheel 904 is driven by a transmission belt 905, which then drives the second rotating shaft 902 to rotate, so that the device can be better controlled to move on the inner wall of the steel pipe pile. The camera device 7 is then used to facilitate the operator to observe the inner wall of the steel pipe pile, so that the operator can accurately control the positioning of the device, thereby achieving precise sandblasting operations. The support plate 501 is used to support the device, so that the stability of the device is ensured, and the first rotating shaft 504 is driven to rotate by the first rotating motor 502.

[0039] Through the connection of the rotating interface 503, it is ensured that the connection between one end and the output end of the sand regulating valve 4 does not rotate, and the connection between the other end and the first rotating shaft 504 rotates, so that the circulation between the connecting pipe 505 and the sand regulating valve 4 is satisfied, and the winding setting of the connecting pipe 505 is satisfied, so that the connecting pipe 505 can be better recovered and released, which is convenient for the operator to retract and release the connecting pipe 505, reduces the difficulty of work, and thus improves the spraying and work efficiency. Then, the output end of the second rotating motor 13 is connected to the output pipe 12 through a gear transmission, and is connected to the sandblasting head 14 through a through connection, so that the rotation of the sandblasting head 14 is satisfied, thereby improving the treatment effect. Finally, water resources can be stored in the water tank 1501 through the water inlet 1502, and then the water resources are pumped out by the water pump 1503 and introduced into the nozzle 1504, and then sprayed by the nozzle 1504, so that it can effectively suppress the generation and diffusion of dust, avoid dust affecting the surrounding environment and the health of the operator, thereby improving the safety and environmental protection performance of the sandblasting operation.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for sandblasting the weld seam on the inner wall of a steel pipe pile, comprising a sandblasting box (1), a control panel (2), a filter (3) and a sand regulating valve (4), wherein the control panel (2) is arranged at the center of one side of the sandblasting box (1), the filter (3) is arranged at the upper center of the other side of the sandblasting box (1), and the sand regulating valve (4) is arranged at the center of the lower end surface of the sandblasting box (1), characterized in that: A retractable device (5) is provided at the lower center of the front end face of the sandblasting box (1), a support box (6) is provided at the front end of the retractable device (5), a camera device (7) is provided at one side of the center of the support box (6), support rods (8) are provided at the front of both sides of the lower end face of the support box (6), a support inclined rod (10) is provided at the rear of the lower end face of the support box (6), a caster (16) is provided at the center of the lower end of the support inclined rod (10), a moving device (9) is provided at the other side of the center of the support box (6), a bearing (11) is provided on the outer side of the output end of the retractable device (5), an output pipe (12) is provided at the center of the outer side of the outer ring of the bearing (11), a second rotating motor (13) is provided on one side of the output pipe (12), a sandblasting head (14) is provided at both sides of the center of the front end face of the support box (6), and a dust removal device (15) is provided at the center of the upper end face of the support box (6).

2. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The retractable device (5) comprises two support plates (501), a first rotating motor (502), a rotating interface (503), a first rotating shaft (504) and a connecting pipe (505), wherein the two support plates (501) are respectively arranged at the lower sides of the front end surface of the sandblasting box (1), the first rotating motor (502) is arranged at the center of one side of the support plate (501), and the output end passes through the one side wall of the support plate (501) to the other side wall of the support plate (501), the first rotating shaft (504) is arranged at the output end of the first rotating motor (502), and the rotating interface (503) is arranged at the output end of the first rotating motor (502). The first rotating shaft (504) is located at one end thereof, and the input end thereof passes through a side wall of the support plate (501) on the other side and passes to the other side of the support plate (501) on the other side; the input end of the rotating interface (503) is connected to the output end of the sand regulating valve (4); the output end of the rotating interface (503) passes through a side wall of the first rotating shaft (504) and passes to the inside of the first rotating shaft (504); the connecting pipe (505) is rotatably connected to the output end of the rotating interface (503) and is wound around and connected to the outside of the first rotating shaft (504); the output end of the connecting pipe (505) passes through the rear end surface of the supporting box (6) and passes to the inside of the supporting box (6).

3. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The moving device (9) comprises a driving motor (901), a second rotating shaft (902) and two rotating wheels (903); the driving motor (901) is arranged at one side of the center of the support box (6); the second rotating shaft (902) is arranged at the lower end of the center between the two support rods (8), and the two ends respectively penetrate the one side wall of the two support rods (8) to the other side wall of the two support rods (8); the upper end of the support rod (8) on one side penetrates the lower end surface of the support box (6) to the lower inner wall of the support box (6); and the two rotating wheels (903) are respectively arranged at the two ends of the second rotating shaft (902).

4. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 3, characterized in that: A transmission wheel (904) is provided at one side of the output end of the driving motor (901) and the outer center of the second rotating shaft (902), and a transmission belt (905) is sleeved on the outer sides of the two transmission wheels (904).

5. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The dust removal device (15) comprises a water tank (1501), a water inlet (1502), a water pump (1503) and a nozzle (1504); the water tank (1501) is arranged at the upper end surface of the support box (6); the water inlet (1502) is arranged at one side of the center of the upper end surface of the water tank (1501); the water pump (1503) is arranged at the other side of the center of the upper end surface of the support box (6); and the input end passes through the water tank (1501) and reaches the interior of the water tank (1501); the nozzle (1504) is arranged at the front end of the center of the upper end surface of the water tank (1501); and the input end is connected to the output end of the water pump (1503).

6. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The input end of the filter (3) passes through one side of the sandblasting box (1) and reaches the interior of the sandblasting box (1), and the output end is connected to the input end of the sand regulating valve (4).

7. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The output end of the camera device (7) passes through the front inner wall of the support box (6) and reaches the front end surface of the support box (6).

8. The device for sandblasting the inner wall weld of a steel pipe pile according to claim 1, characterized in that: The output end of the second rotating motor (13) is connected to the outer side of one end of the output tube (12) by gear transmission, the output end of the output tube (12) passes through the front inner wall of the support box (6) to the front end surface of the support box (6), and the output end is connected to the input ends of the two sandblasting heads (14).

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