In-pipe sand blasting device for large-specification pipe body

Abstract

The utility model relates to an in-pipe sand blasting device for a large-specification pipe body, which is characterized in that a sand blasting trolley is used for clamping a sand blaster to horizontally enter a petroleum conveying pipe body to carry out uniform and rapid sand blasting treatment, so that pretreatment preparation is made for anti-corrosion treatment of the inner wall of the pipe body; the nozzle upper pressing plate and the nozzle lower pressing plate clamp the front end, close to the nozzle of the sand blaster, of the sand blaster, the rubber pipe upper pressing plate and the rubber pipe lower pressing plate clamp the rubber pipe for conveying grinding materials, the sand blaster horizontally enters the sand blasting pipe body, the rotary sleeve is arranged at the rear end of the guide pipe, and the rubber pipe is supported to be prevented from being rubbed with the inner wall of the pipe body. And the conveying of the grinding materials is smoother. Compared with the prior art, the device has the advantages of high production efficiency, high safety, wide application range and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sand blasting technology field for pipe body especially a sand blasting device in pipe for large -size pipe body. BACKGROUND

[0002] With the improvement of oilfield development technology, the complex working conditions such as high-temperature and high-pressure well and high-sulfur well increase, and these harsh oil well exploitation conditions continuously improve the requirements of conveying tools. Because the medium conveyed is corrosive, in order to slow down the corrosion speed of the pipeline under the chemical and electrochemical action of the internal and external medium, prolong the service life of the pipeline, reduce economic losses, reduce safety accidents and personnel injuries, and reduce environmental pollution, the internal and external conveying pipes need to be anticorrosion treated. When the outer diameter of the large -size conveying pipe is coated and anticorrosion treated, the original production line cannot automatically sand blast the large -size pipe body, and only manual mode can be used to drag the sand blasting device on the inner wall of the pipe to manually sand blast the large -size pipe body. However, manual operation has high labor intensity, low production efficiency, and safety hazards. Therefore, how to enable the device to automatically sand blast the internal coating of the large -size conveying pipe without significantly adjusting the production line is a technical problem to be solved. SUMMARY

[0003] The utility model discloses a sand blasting device in pipe for large -size pipe body, which can stably enter the pipe through the guide cylinder, automatically sand blast the inner wall of the large -size pipe body through forward and backward movement, improve production efficiency, and reduce labor intensity.

[0004] The utility model discloses a sand blasting device in pipe for large -size pipe body, which can stably enter the pipe through the guide cylinder, automatically sand blast the inner wall of the large -size pipe body through forward and backward movement, improve production efficiency, and reduce labor intensity.

[0005] According to the utility model, a sand blasting device in pipe for large -size pipe body is provided, which comprises a driving trolley and a sand blasting device.

[0006] The driving trolley comprises an ultra-low speed turbine worm reducer, a bearing seat, a wheel, a driving shaft, a driven shaft and a base. The ultra-low speed turbine worm reducer is installed at the rear end of the base, connected with the driving shaft, drives the wheel to drive the sand blasting device to move forward and backward in the pipe body, and the driven shaft is installed on the bearing seat and drives the wheel at the front part of the base to rotate.

[0007] The sand blasting device comprises a nozzle upper pressing plate, a nozzle lower pressing plate, a rubber pipe upper pressing plate, a rubber pipe lower pressing plate, a sand blasting device nozzle and a rubber pipe. The nozzle upper pressing plate and the nozzle lower pressing plate are installed at the front end of the base and clamp the sand blasting device close to the front end of the sand blasting device nozzle. The rubber pipe upper pressing plate and the rubber pipe lower pressing plate are installed at the middle part of the base and clamp the rubber pipe conveying abrasive.

[0008] Further, the sand blasting device further comprises a guide cylinder, the driving trolley and the sand blaster are arranged in the guide cylinder and enter the pipe body from the guide cylinder.

[0009] Further, a supporting shaft is arranged on the diameter of the cross-section circle at the rear end of the guide cylinder, and a rotating sleeve is sleeved on the supporting shaft.

[0010] Further, the driving trolley further comprises a bearing seat dust cover, which wraps the bearing seat.

[0011] Further, the upper and lower pressing plates of the spray head are adjusted in height by the lower threaded lead screw.

[0012] Further, the upper and lower pressing plates of the rubber tube are adjusted in height by the lower threaded lead screw.

[0013] Further, before the sand blasting treatment, the sand blaster and the sand blasting trolley are arranged in the guide cylinder and horizontally enter the pipe body; the front end of the spray head of the sand blaster is clamped by the upper and lower pressing plates of the spray head and is positioned at the center position of the cross-section circle of the pipe body; the front end of the rubber tube of the sand blaster is clamped by the upper and lower pressing plates of the rubber tube and is parallel to the inner wall of the pipe body; and the rear end of the rubber tube of the sand blaster is arranged on the rotating sleeve.

[0014] Further, the lower pressing plate of the spray head is replaced and adjusted according to the size of the pipe body.

[0015] Further, the lower pressing plate of the rubber tube is replaced and adjusted according to the size of the pipe body.

[0016] Further, the spray head of the sand blaster is a three-prong rotating spray head.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) improve production efficiency and quality: through the sand blasting trolley drives the sand blaster to enter the large-specification conveying pipe body, the sand blasting treatment is carried out to the inner wall of the pipe body, compared with the manual dragging sand blaster into the pipe body, the sand blasting speed is fast and uniform, improves production efficiency and production quality.

[0019] (2) enhance safety: the sand blasting trolley is used instead of manual clamping of the sand blaster to enter the pipe body, the safety of the production process is improved, and since the machine sand blasting is more uniform than manual sand blasting, the conveying pipe body coating quality is higher, and the safety of the subsequent pipe body use is improved.

[0020] (3) Wide range of applications: The sandblasting device as a whole can enter the interior of the conveying pipe body, which occupies a small area and does not require major changes to the existing production line. At the same time, the nozzle lower pressure plate and the rubber tube lower pressure plate can be replaced and adjusted to match the specifications according to the inner diameter size of the conveying pipe, so that the sandblaster can be placed horizontally in the center of the circular cross-section of the conveying pipe body with different inner diameters. Therefore, it is suitable for production lines of various conveying pipe bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of an in-pipe sandblasting device for large-sized pipes;

[0022] Figure 2 A side view of an in-pipe sandblasting device for large-sized pipes;

[0023] Figure 3 A top view of an in-pipe sandblasting device for large-sized pipes;

[0024] Figure 4 An isometric view of an in-pipe sandblasting apparatus for large-size pipes.

[0025] Explanation of the numbers in the figure: 1. Guide cylinder; 2. Nozzle upper pressure plate; 3. Nozzle lower pressure plate; 4. Bearing seat dust cover; 5. Bearing seat; 6. Rubber tube upper pressure plate; 7. Rubber tube lower pressure plate; 8. Ultra-low speed worm gear reducer; 9. Rotating sleeve; 10. Sandblaster nozzle; 11. Wheel; 12. Driving shaft; 13. Passive shaft; 14. Base. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] Anti-corrosion treatment is a crucial step in the production of oil drilling and transportation equipment. Before anti-corrosion treatment is applied to the interior of large-scale oil pipelines, the pipe walls must be sandblasted to remove debris such as steel slag, welding slag, and rust, ensuring smoothness and cleanliness. The sandblasting device of this embodiment enters the interior of the pipeline and automatically and quickly and evenly sandblasts the inner wall, improving production efficiency and safety.

[0028] like Figure 1 FIG. 1 is a front view of an in-pipe sandblasting device for large-sized pipes, comprising a driving carriage and a sandblaster.

[0029] The driving trolley comprises an ultra-low-speed turbine worm reducer 8, a bearing seat 5, a wheel 11, a driving shaft 12, a driven shaft 13 and a base 14. The ultra-low-speed turbine worm reducer 8 is installed at the rear end of the base 14 and is connected with the driving shaft 12 to drive the wheel 11 to drive the sand blasting device to move forward and backward in the pipe body. The driven shaft 13 is installed on the bearing seat 5 to drive the wheel 11 to rotate. The sand blasting device comprises a nozzle upper pressing plate 2, a nozzle lower pressing plate 3, a rubber pipe upper pressing plate 6, a rubber pipe lower pressing plate 7, a sand blasting device nozzle 10 and a rubber pipe. The nozzle upper pressing plate 2 and the nozzle lower pressing plate 3 are installed at the front end of the base 14 to clamp the sand blasting device close to the front end of the sand blasting device nozzle 10. The rubber pipe upper pressing plate 6 and the rubber pipe lower pressing plate 7 are installed at the middle part of the base 14 to clamp the rubber pipe for conveying the abrasive. The base 14 is made of a No. 12 C-shaped steel. The side view of the sand blasting device of the embodiment is shown in Figure 2 , and the top view is shown in Figure 3 .

[0030] The sand blasting device further comprises a guide cylinder 1 with an inner diameter of φ386 mm. The driving trolley and the sand blasting device are placed inside the guide cylinder 1 and enter the pipe body from the guide cylinder 1. A support shaft is arranged on the diameter of the cross-section circle at the rear end of the guide cylinder 1. A rotating sleeve 9 is sleeved on the support shaft. The driving trolley further comprises a bearing seat dust cover 4 to wrap the bearing seat 5 to prevent the abrasive from splashing to the bearing seat 5 during the sand blasting process.

[0031] The nozzle upper pressing plate 2 and the nozzle lower pressing plate 3 are adjusted in height by the lower threaded screw rod. The rubber pipe upper pressing plate 6 and the rubber pipe lower pressing plate 7 are adjusted in height by the lower threaded screw rod. The nozzle lower pressing plate 3 is replaced and adjusted according to the size of the pipe body. The rubber pipe lower pressing plate 7 is replaced and adjusted according to the size of the pipe body. The sand blasting device nozzle 10 is a three-pronged rotating nozzle.

[0032] As shown in Figure 4 , before the sand blasting process, the sand blasting device and the sand blasting trolley are placed inside the guide cylinder 1 and horizontally enter the pipe body. The front end of the nozzle 10 of the sand blasting device is clamped by the nozzle upper pressing plate 2 and the nozzle lower pressing plate 3 and is positioned at the center position of the cross-section circle of the pipe body. The front end of the rubber pipe of the sand blasting device is clamped by the rubber pipe upper pressing plate 6 and the rubber pipe lower pressing plate 7 and is parallel to the inner wall of the pipe body. The rear end of the rubber pipe of the sand blasting device is placed on the rotating sleeve 9 to be lifted to prevent the rubber pipe from rubbing against the inner wall of the pipe body, causing wear and safety hazards of the rubber pipe and making the conveying of the abrasive more smooth.

[0033] In the installation and use of the embodiment, the guide cylinder 1 is placed in line with the large-diameter pipe body, ensuring that the four car wheels 11 of the mobile sand blasting trolley can enter the large-diameter pipe body in a straight line from the guide cylinder 1. Then the ultra-low speed turbine worm reducer 8 is started, which drives the car wheels 11 through the driving shaft 12, so that the sand blasting device moves quickly (the whole process takes 1 minute) to the designated position in the conveying pipe body (about 9 meters long). When the sand blasting starts, the whole sand blasting device slowly retreats (the whole process takes 3 minutes), and uniformly sprays sand. Since the driving trolley and the sand blaster of the sand blasting device of the embodiment can enter the conveying pipe body as a whole, compared with the sand blasting device in which only the nozzle enters the pipe body, the sand blasting device has a small floor area, and does not need to be provided with a separate track, and has a small modification to the existing production line. At the same time, the sand blasting device improves the sand blasting processing efficiency and quality, improves the degree of automation, and effectively improves the working environment.

[0034] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An in-line grit blasting device for large diameter pipe bodies, characterized by, The device comprises a driving trolley and a sand blaster, The driving trolley comprises an ultra-low-speed turbine worm reducer (8), a bearing seat (5), a wheel (11), a driving shaft (12), a driven shaft (13) and a base (14). The ultra-low-speed turbine worm reducer (8) is installed at the rear end of the base (14), connected with the driving shaft (12) to drive the wheel (11) to drive the sand blaster to move forward and backward in the pipe body; the driven shaft (13) is installed on the bearing seat (5) to drive the wheel (11) at the front of the base (14) to rotate. The sand blaster comprises a nozzle upper pressing plate (2), a nozzle lower pressing plate (3), a rubber pipe upper pressing plate (6), a rubber pipe lower pressing plate (7), a sand blaster nozzle (10) and a rubber pipe. The nozzle upper pressing plate (2) and the nozzle lower pressing plate (3) are installed at the front end of the base (14) to clamp the sand blaster near the front end of the sand blaster nozzle (10); the rubber pipe upper pressing plate (6) and the rubber pipe lower pressing plate (7) are installed at the middle part of the base (14) to clamp the rubber pipe for transmitting abrasive materials.

2. A pipe internal sandblasting device for large-sized pipe bodies according to claim 1, characterized in that, The sand blaster further comprises a guide cylinder (1), and the driving trolley and the sand blaster are arranged inside the guide cylinder (1) and enter the pipe body from the guide cylinder (1).

3. A device for sandblasting the inside of a large-sized pipe according to claim 2, characterized in that, A support shaft is arranged on the diameter of the cross-section circle at the rear end of the guide cylinder (1), and a rotating sleeve (9) is sleeved on the support shaft.

4. A device for sandblasting the inside of a large-sized pipe according to claim 1, wherein The driving trolley further comprises a bearing seat dust cover (4) for wrapping the bearing seat (5).

5. A device for sandblasting the inside of a large-sized pipe according to claim 1, wherein The nozzle upper pressing plate (2) and the nozzle lower pressing plate (3) are adjusted in height by a lower threaded screw rod.

6. A device for sandblasting the inside of a large-sized pipe according to claim 1, wherein The rubber pipe upper pressing plate (6) and the rubber pipe lower pressing plate (7) are adjusted in height by a lower threaded screw rod.

7. A device for sandblasting the inside of large-sized pipes according to claim 1, characterized in that, Before sand blasting, the sand blaster and the sand blasting trolley are arranged inside the guide cylinder (1) and horizontally enter the pipe body; the front end of the nozzle (10) of the sand blaster is clamped by the nozzle upper pressing plate (2) and the nozzle lower pressing plate (3) and positioned at the center of the cross-section circle of the pipe body; the front end of the rubber pipe of the sand blaster is clamped by the rubber pipe upper pressing plate (6) and the rubber pipe lower pressing plate (7) and parallel to the inner wall of the pipe body; the rear end of the rubber pipe of the sand blaster is arranged on the rotating sleeve (9).

8. A device for sandblasting the inside of a large-sized pipe according to claim 1, wherein The nozzle lower pressing plate (3) is replaced and adjusted in size according to the size of the pipe body.

9. A device for sandblasting the inside of large-sized pipes according to claim 1, characterized in that, The rubber pipe lower pressing plate (7) is replaced and adjusted in size according to the size of the pipe body.

10. A pipe internal sandblasting device for large-sized pipe bodies according to claim 1, characterized in that, The sand blaster nozzle (10) is a three-pronged rotating nozzle.

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