A metal pipe scale cleaning device

Abstract

This utility model belongs to the field of pipe oxide scale cleaning devices, aiming to solve the problems of traditional cleaning methods that require two processes, are inefficient, and generate significant dust hazards. It provides a metal pipe oxide scale cleaning device. The device includes an outer cover composed of upper and lower covers. When closed, the outer cover leaves a 0.2-5mm processing gap with the pipe to be processed. The outer cover's contour is adapted to the pipe, and the spacing is uniform at any position. Inner wall support columns can position the pipe. One end is fitted with a sandblasting pipe, using compressed air to spray steel sand while simultaneously grinding the inner and outer walls of the pipe. The other end can be equipped with an L-shaped pipe stop structure to fix the pipe. A dust cover at the other end of the pipe can collect steel sand and oxide scale. The upper and lower covers are fixed to the base by screws. When changing to different pipe specifications, only the outer cover needs to be replaced, and the cover height adjusted by the screws. The device can simultaneously clean the inner and outer walls of the pipe, resulting in high efficiency, good cleaning effect, reduced dust, and an improved working environment.

Description

Technical Field

[0001] This utility model belongs to the field of pipe oxide scale cleaning devices, specifically relating to a metal pipe oxide scale cleaning device. Background Technology

[0002] The oxide layer formed on the surface of metal pipes after high-temperature processing such as rolling, welding, and heat treatment provides a clean surface for subsequent coating, corrosion protection, welding, or fluid transportation. The oxide layer is usually removed by the impact and cutting action of abrasives.

[0003] The current solution involves internal sandblasting, where high-pressure gas is used to blow steel shot into the inner wall of the pipe, removing the iron oxide scale through friction between the steel shot and the inner wall. If the pipe is bent or long, sandblasting is often required at the other end as well. After cleaning the inner wall, shot blasting is used to remove the oxide scale from the outer wall. Therefore, removing oxide scale requires at least two steps, and the process is manual, one pipe at a time, resulting in low efficiency and harmful dust pollution for workers. Therefore, a more convenient and efficient pipe oxide scale removal device is urgently needed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a metal pipe oxide scale cleaning device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A metal pipe oxide scale removal device includes: an outer cover, comprising an upper cover and a lower cover, the upper cover and the lower cover being used to close and cover the pipe to be processed, and after closing, a processing gap of 0.2-5mm is left between the upper cover and the lower cover and the pipe to be processed; the nozzle of the sandblasting pipe is a certain distance away from the end of the pipe to be processed, and the sandblasting pipe uses compressed air to scatter and spray steel sand out, so it can spray from the end into the inner cavity and working gap of the pipe, and simultaneously polish the inner and outer surfaces of the pipe.

[0007] It also includes a plug, which is used to seal one end of the outer casing after the pipe to be processed and the outer casing are in place. The sandblasting pipe is installed on the plug. The plug can seal the end of the outer casing, preventing steel sand from overflowing and scattering, and can also reduce noise on site.

[0008] The outer cover is provided with a tube stop structure at the end without a plug. The tube stop structure abuts against the end of the tube to be processed for further fixing the tube to be processed.

[0009] Preferably, the tube stop structure is L-shaped, extending inward from the outer cover and then turning to extend in a direction parallel to the axis of the end of the tube to be processed, abutting against the end of the tube to be processed, so as to avoid turbulence at the end of the tube and affect the grinding effect of the end.

[0010] The end of the pipe fitting to be processed without a plug is equipped with a collection device, which includes a dust cover for collecting steel shot and mill scale.

[0011] Preferably, the outline of the outer cover is adapted to the outline of the pipe to be processed, and at any position, the distance between the outer wall of the pipe to be processed and the inner wall of the outer cover is the same.

[0012] Preferably, the inner wall of the outer cover is provided with several tapered support columns at intervals for supporting and positioning the tube to be processed; the end of the column that contacts the tube is relatively small in order to minimize the contact area with the tube and reduce the area that is blocked and cannot be polished.

[0013] Preferably, the processing gap is between 0.2 and 5 mm.

[0014] Preferably, the lower cover is fixed to the base by a screw, and the upper cover is fixed to the drive plate by a screw. The drive plate is driven to rise and fall by a hydraulic cylinder. After the pipe to be processed is assembled and processed, the hydraulic cylinder drives the upper cover to rise, which facilitates the picking up or placing of the pipe. After the pipe is placed, the hydraulic cylinder drives the upper cover to fall and close with the lower cover.

[0015] When changing the specifications of pipe fittings, the corresponding outer cover needs to be replaced. The height of the upper and lower covers from the center line can be adjusted by using a screw.

[0016] Furthermore, the end of the plug is provided with a baffle plate, the diameter of which is less than or equal to the inner diameter of the pipe to be processed, so as to guide the steel shot at the spray point and prevent the steel shot from being sprayed directly into the inner cavity of the pipe.

[0017] Furthermore, the end of the shield located inside the plug is tapered, which better guides the steel shot.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This device can simultaneously remove oxide scale from the inner and outer walls of pipes, eliminating the need for two separate processes as in traditional methods and significantly improving work efficiency. Its sandblasting nozzle can be adjusted in angle according to actual conditions, allowing for more precise grinding of the inner and outer surfaces of the pipe, ensuring effective oxide scale removal. Furthermore, the outer casing's contour is perfectly matched to the pipe to be processed, and the distance between the outer wall of the pipe and the inner wall of the outer casing is the same at any position. Combined with the support columns spaced along the inner wall, this provides better support and positioning for the pipe to be processed, making the cleaning process more stable.

[0020] When changing to pipe fittings of different specifications, only the corresponding outer cover needs to be replaced, and the height of the upper and lower covers from the center line can be adjusted by using a screw rod to accommodate the new pipe fitting, making the operation convenient and quick. Simultaneously, the cooperation between the plug and the pipe body stop structure effectively fixes the pipe to be processed, preventing it from shaking during grinding and ensuring smooth cleaning work. Furthermore, the collection device can collect steel shot and mill scale, reducing on-site dust generation, improving the working environment, and protecting worker health.

[0021] Furthermore, the upper and lower covers of the device, when closed, leave a processing gap of 0.2 to 5 mm between themselves and the pipe to be processed. This ensures that the sandblasting pipe has sufficient space to spray steel sand onto the pipe surface while preventing steel sand from splashing due to excessive gaps, thus improving the utilization rate of steel sand. Additionally, the leather curtain installed on the baffle plate acts as a shield, preventing steel sand and scale from scattering during the cleaning process, further optimizing the cleaning effect.

[0022] If the pipe is bent, it is difficult to effectively grind the other end by sandblasting from one end. In this case, the orientation of the pipe to be processed can be reversed, or the plug and collection device can be replaced. The inner and outer surfaces of the pipe can be ground from both ends to ensure that the entire pipe is fully ground.

[0023] This metal pipe oxide scale cleaning device, through its reasonable structural design and innovative functional configuration, solves the problems of low working efficiency and high dust hazards existing in the prior art, and has significant practical value and promotion significance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0026] Figure 2 This is a schematic diagram showing the position of one end of the stop structure of this utility model;

[0027] Figure 3 This is a detailed schematic diagram of the stop structure of this utility model;

[0028] Figure 4 This is a schematic diagram showing the positions of the sandblasting pipe and the end of the pipe to be processed after the upper cover is removed in this utility model.

[0029] Figure 5 This is a schematic diagram of the lower cover and plug of the present invention after the upper cover and the pipe to be processed are removed;

[0030] Figure 6 This is a detailed schematic diagram of the plug position in this utility model;

[0031] Figure 7 This is a detailed schematic diagram of the plug.

[0032] In the diagram: 1. Upper cover; 2. Lower cover; 3. Pipe to be processed; 4. Processing gap; 5. Plug; 6. Sandblasting pipe; 7. Stop structure; 8. Support column; 9. Lead screw; 10. Base; 11. Drive plate; 12. Shielding plate; 13. Cone. Detailed Implementation

[0033] Please see Figures 1-6 In this embodiment:

[0034] An apparatus for cleaning oxide scale from metal pipes includes: an outer cover, which is composed of an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 can be closed to cover the pipe to be processed 3. In the closed state, a certain processing gap 4 is maintained between the upper cover 1, the lower cover 2 and the pipe to be processed 3.

[0035] A plug 5 is also provided. After the pipe fitting 3 and the outer cover are in place, the plug 5 is used to seal one end of the outer cover. A sandblasting pipe 6 is installed on the plug 5. The nozzle of the sandblasting pipe 6 is a certain distance away from the end of the pipe fitting to be processed. The sandblasting pipe 6 sprays steel sand in a cone shape. Therefore, the sandblasting pipe 6 can use compressed air to spray steel sand onto the inner and outer surfaces of the pipe fitting, and at the same time grind the inner and outer surfaces of the pipe fitting. If the pipe fitting is curved, it is difficult to grind the entire length direction by simply spraying from one end. The pipe fitting to be processed can be turned around, or the position of the sandblasting pipe 6 can be adjusted to perform sandblasting from the other end to ensure that the overall grinding is in place.

[0036] The outer cover is provided with a pipe stop structure 7 at the end without the plug 5. The pipe stop structure 7 is closely attached to the end of the pipe to be processed 3, thereby fixing the pipe to be processed 3.

[0037] The other end of the pipe fitting 3 to be processed is provided with a collection device (not shown in the figure). The collection device includes a dust cover, which is used to block steel shot and the oxide scale that is ground off, so that it falls into the storage box set below.

[0038] The tube stop structure 7 is L-shaped, extending inward from the outer cover and then extending in a direction parallel to the axis of the end of the tube to be processed 3, and abutting against the end of the tube to be processed 3 to avoid turbulence at the end of the tube and affecting the grinding effect at the end.

[0039] The outer contour of the outer cover matches the shape of the pipe to be processed 3, and the distance between the outer wall of the pipe to be processed 3 and the inner wall of the outer cover remains consistent at any position.

[0040] The inner wall of the outer cover is evenly distributed with several support columns 8, which are used to support and position the pipe fitting 3 to be processed;

[0041] The machining gap 4 is 0.2 to 5 mm;

[0042] The lower cover 2 is fixed to the base 10 by a screw 9, and the upper cover 1 is fixed to the drive plate 11 by a screw. The drive plate 11 is driven to rise and fall by a hydraulic cylinder (not shown in the figure). When the pipe specifications are changed, the outer cover is replaced accordingly. The height of the upper cover 1 and the lower cover 2 from the center line can be adjusted by the screw 9.

[0043] The end of the plug is provided with a baffle plate 12. The diameter of the baffle plate 12 is less than or equal to the inner diameter of the pipe fitting 3 to be processed. The end of the baffle plate located inside the plug is in the shape of a cone 13, so as to guide the steel shot at the spray point and prevent the steel shot from being sprayed directly into the inner cavity of the pipe.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A metal pipe oxide scale removal device, comprising an outer cover, the outer cover comprising an upper cover and a lower cover, the upper cover and the lower cover being used to close and cover the pipe to be processed, and after closing, a working gap is left between the upper cover and the lower cover and the pipe to be processed, and a sandblasting pipe using compressed air to spray steel sand from the end into the inner cavity of the pipe and the working gap, thereby simultaneously polishing the inner and outer surfaces of the pipe.

2. A scale cleaning device for metal pipes according to claim 1, characterized in that: It also includes a plug, which is used to seal one end of the outer cover after the pipe to be processed and the outer cover are in place, and the sandblasting pipe is provided on the plug.

3. A scale cleaning device for metal pipes according to claim 1, characterized in that: The other end of the outer cover is provided with a collection device, which includes a dust cover for collecting steel shot and mill scale.

4. The metal pipe oxide scale cleaning device according to claim 2, characterized in that: The outer cover has a tube stop structure at the end without a plug. The tube stop structure abuts against the end of the tube to be processed and is used to cooperate with the plug to fix the tube to be processed.

5. The metal pipe oxide scale cleaning device according to claim 2, characterized in that: The tube stop structure is L-shaped, extending inward from the outer cover and then turning to extend in a direction parallel to the axis of the end of the tube to be processed, abutting against the end of the tube to be processed.

6. The metal pipe oxide scale cleaning device according to claim 2, characterized in that: The outline of the outer cover is adapted to the outline of the pipe to be processed, and at any position, the distance between the outer wall of the pipe to be processed and the inner wall of the outer cover is the same.

7. A scale cleaning device for metal pipes according to claim 2, characterized in that: The inner wall of the outer cover is provided with several support columns at intervals for supporting and positioning the pipe fittings to be processed.

8. The metal pipe oxide scale cleaning device according to claim 1, characterized in that: The angle of the sandblasting pipe is adjustable.

9. A scale cleaning device for metal pipes as claimed in claim 5, characterized in that: The upper and lower covers are fixed to the base by screw rods.

10. The metal pipe oxide scale cleaning device according to claim 1, characterized in that: The end of the plug is provided with a shielding plate, the diameter of which is less than or equal to the inner diameter of the pipe to be processed.

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