A sanding cleaning device for the inner wall of a pipe

Abstract

The utility model discloses a sanding cleaning equipment of pipeline inner wall, include: two interval arrangement's support tray frame for supporting equipment, cleaning subassembly includes connecting shaft and rotary disc holder, and the both ends of connecting shaft are connected with two support tray frame respectively, and rotary disc holder is set up on connecting shaft and is connected with connecting shaft rotation through rotation bearing, the lateral side of rotary disc holder sets up and moves hopper and throws a ball component, and throws a ball component is used to throw sand material to the pipeline inner wall and is cleaned, and moves hopper and is used for conveying sand material to throw a ball component, and moves hopper and sets up in the feed end of throw a ball component, sets up drive pulley assembly on rotary disc holder, and drive pulley assembly is used for driving rotary disc holder relative to connecting shaft rotation, still sets up and moves pulley assembly on rotary disc holder, and moves pulley assembly is used for driving and moves hopper and revolves around connecting shaft revolution with rotary disc holder, and keeps and moves hopper and not rotation simultaneously. The problem of efficient cleaning of pipeline inner wall has been solved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline cleaning technology, specifically a pipeline inner wall sandblasting and cleaning device. Background Technology

[0002] In industrial production, pipelines serve as critical infrastructure for transporting fluids or materials, and the surface condition of their inner walls directly affects transport efficiency, service life, and safety performance. Especially during new pipeline construction or major repairs, to ensure the adhesion and longevity of subsequent anti-corrosion coatings (such as paint and epoxy resin), rigorous pretreatment of the pipeline's inner walls is essential. This involves thoroughly removing scale, rust, welding slag, oil, and other impurities to achieve the specified cleanliness and roughness standards (e.g., Sa2.5). This process is a crucial foundational step in pipeline corrosion protection engineering.

[0003] Currently, shot blasting is widely used in the pre-treatment process for corrosion protection of pipeline inner walls due to its advantages such as high efficiency, good cleanliness, and the ability to create uniform roughness. Its principle is to use high-speed jets of steel shot (abrasive) to impact the inner wall surface of the pipeline, achieving the purpose of cleaning and roughening. Common shot blasting equipment includes through-feed shot blasting machines and hook-type shot blasting machines.

[0004] However, existing conventional shot blasting technology has significant limitations when applied to the pretreatment of the inner walls of large-diameter (long-distance) pipelines for corrosion protection: Significant energy loss and poor cleaning effect: For large-diameter pipelines (e.g., pipelines exceeding 1 meter or even several meters in diameter), due to equipment structural limitations, shot blasting machines can typically only be placed near the pipeline inlet or outside the pipeline. This forces the steel shot to travel a considerable distance through the air to reach the pipe wall surface to be cleaned. During this long journey, the frictional resistance between the steel shot and the air causes its kinetic energy to decrease rapidly. When the steel shot finally impacts the pipe wall, its impact force is insufficient to effectively remove stubborn oxide scale, rust layers, or achieve the desired surface roughness. Especially for areas deep within the pipeline or far from the shot blasting machine, the cleaning effect often fails to meet the high standards required for anti-corrosion pretreatment.

[0005] Limited equipment adaptability: Traditional through-type or hook-type shot blasting equipment is difficult to flexibly penetrate into the interior of long-distance pipelines, or its structure is large and complex, making it unsuitable for efficient internal cleaning of large-diameter pipelines at pipeline installation sites or in confined spaces.

[0006] While techniques such as high-pressure water cleaning and manual grinding can be used for surface cleaning, in the field of corrosion pretreatment, they typically cannot simultaneously achieve the high cleanliness (thorough removal of oxide scale and rust) and ideal anchor texture roughness achievable by shot blasting. High-pressure water cleaning has limited effectiveness for severe corrosion and may introduce moisture that affects subsequent coating; manual cleaning is extremely inefficient and produces inconsistent quality, making it completely unsuitable for large-scale corrosion pretreatment of large-diameter pipes. Therefore, those skilled in the art urgently need a new pipe interior sandblasting and cleaning device. Utility Model Content

[0007] This utility model provides a pipe inner wall sandblasting and cleaning device, comprising: Two spaced-apart support trays are used for the installation of the equipment and to isolate the equipment from flying sand and splashes during the cleaning process. A cleaning assembly includes a connecting shaft and a rotating disk frame. The two ends of the connecting shaft are respectively connected to two supporting disk frames. The rotating disk frame is sleeved on the connecting shaft and rotatably connected to the connecting shaft through a rotary bearing. The rotating disc frame is equipped with a shot blasting assembly and a translational hopper on its periphery. The shot blasting assembly is used to blast sand into the inner wall of the pipe for cleaning, and the translational hopper is used to feed sand into the shot blasting assembly. The translational hopper is located at the feed end of the shot blasting assembly. The rotating disk frame is provided with a drive pulley assembly, which is used to drive the rotating disk frame to rotate relative to the connecting shaft. The rotating disc frame is also equipped with a translational pulley assembly, which is used to drive the translational hopper to revolve around the connecting shaft with the rotating disc frame, while keeping the translational hopper itself from rotating. Optionally, one end of the rotating disc frame is further provided with a travel movement guide shaft, and a travel drive motor is provided on the travel movement guide shaft. The travel drive motor is used to drive the equipment to move axially along the inner wall of the pipe.

[0008] Optionally, the drive pulley assembly includes a drive drive pulley, a drive timing pulley, a first drive belt, and a first rotary motor. The first rotary motor is mounted on the support plate frame, and the output shaft of the first rotary motor is connected to the drive drive pulley. The drive timing pulley is fixedly connected to the rotary plate frame, and the first drive belt is sleeved on the drive drive pulley and the drive timing pulley.

[0009] Optionally, the translational pulley assembly includes a translational drive pulley, a translational synchronous pulley, and a second drive belt. The translational drive pulley is fixedly mounted on the connecting shaft, the translational synchronous pulley is disposed on the outside of the translational hopper, and the second drive belt is sleeved on the translational drive pulley and the translational synchronous pulley.

[0010] Optionally, the translational synchronous pulley is mounted on a fixed bracket via a rotating bearing, the fixed bracket is fixed relative to the support plate frame, and the translational hopper is fixedly connected to the translational synchronous pulley.

[0011] Optionally, the translational hopper includes a translational funnel and a sand supply pipe, wherein the sand supply pipe is disposed at the bottom of the translational funnel and is connected to the feed port of the shot blasting assembly.

[0012] Optionally, the shot blasting assembly includes a shot blasting motor, a shot blasting drive wheel, a shot blasting driven wheel, a shot blasting timing belt, a bushing, a shot blasting disc, a directional sleeve, a sand stirring disc, and a directional shot blasting protective cover; The shot blasting motor is mounted on the support plate frame; The shot blasting drive wheel is mounted on the output shaft of the shot blasting motor; The shot blasting driven wheel is connected to the shot blasting driven wheel through the shot blasting synchronous belt to form a belt drive; The bushing is fitted and fixed to the rotating shaft of the shot blasting driven wheel; The bottom surface of the directional sleeve is connected to the end of the rotation axis of the shot blasting driven wheel away from the shot blasting motor; The throwing disc is installed on the outside of the directional sleeve; The sand-stirring disc is installed on one side of the directional sleeve and is located on the side of the shot blasting motor that is perpendicular to the shot blasting disc; The directional shot blasting protective cover is installed on the outside of the shot blasting disc, and the directional shot blasting protective cover and the shot blasting disc form an internal space area; The sand supply pipe passes through the directional shot blasting protective cover and connects to the internal space area.

[0013] Optionally, a feed pipe is provided on the side of the support plate frame near the translational hopper, and the feed pipe is used to add material to the translational hopper.

[0014] The beneficial effects of this application are as follows: 1. The drive pulley assembly provided by this utility model drives the rotating disc frame to rotate, which in turn drives the shot blasting assembly to rotate around the connecting shaft. At the same time, the stroke drive motor drives the equipment to move along the pipeline axis, which can perform all-round and rapid cleaning of the inner wall of the pipeline, greatly improving the cleaning efficiency. 2. The shot blasting assembly provided by this utility model can blast sand into the inner wall of the pipe, which has a good cleaning effect on stubborn rust and dirt, and ensures the cleanliness of the inner wall of the pipe. 3. The rotating disc frame provided by this utility model drives the shot blasting assembly to perform orderly revolution through the drive pulley assembly and translation pulley assembly. At the same time, the shot blasting disc itself also rotates at high speed. This dual motion mode combining revolution and rotation not only improves the working efficiency of the shot blasting assembly, but also ensures the uniformity and coverage of the shot blasting process, making the shot blasting effect more ideal and stable. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the rotating disk frame and connecting shaft provided by this utility model. Figure 2 A three-dimensional structural diagram of the pipe inner wall sandblasting and cleaning equipment provided by this utility model; Figure 3 This is a side view of the pipe inner wall sandblasting and cleaning equipment provided by this utility model. Figure 4 This is a schematic diagram of the translational hopper structure provided by this utility model; Figure 5 This is a schematic diagram of the shot blasting assembly structure provided by this utility model; In the diagram: 1. Support plate frame; 11. Feed pipe; 2. Connecting shaft; 3. Rotating plate frame; 4. Rotary bearing; 5. Shot blasting assembly; 51. Shot blasting motor; 52. Shot blasting drive wheel; 53. Shot blasting driven wheel; 54. Shot blasting synchronous belt; 55. Bushing; 56. Shot blasting disc; 57. Orientation sleeve; 58. Sand mixing disc; 59. Orientation shot blasting protective cover; 6. Translational hopper; 61. Translational funnel; 62. Sand supply pipe; 7. Drive pulley assembly; 71. Drive drive pulley; 72. Drive synchronous pulley; 73. First drive belt; 74. First rotary motor; 8. Translational pulley assembly; 81. Translational drive pulley; 82. Translational synchronous pulley; 83. Second drive belt; 84. Rotary bearing; 85. Fixed bracket; 9. Stroke movement guide shaft; 10. Stroke drive motor. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-4 As shown, this application provides a pipe inner wall sandblasting and cleaning device, comprising: Two spaced-apart support frames 1 are used for the installation of the equipment and to isolate the equipment from sand spray during the cleaning process. The support frames 1 are configured as two disc supports with inflatable sealing rings on their outer surfaces. The diameter of the support frames 1 is adapted to the inner diameter of the pipe to be cleaned, and the diameter of the support frames 1 is slightly smaller than the inner diameter of the pipe to be cleaned, so that it can move within the inner diameter of the pipe to be cleaned. When cleaning and sandblasting, the inflatable sealing rings are inflated to isolate the area to be cleaned from other non-processed areas. During the cleaning process, the splashed steel sand only exists between the two spaced-apart support frames 1, which facilitates the recovery work in a smaller area in the later process and improves the efficiency of steel sand recovery. The cleaning assembly includes a connecting shaft 2 and a rotating disk frame 3. The two ends of the connecting shaft 2 are respectively connected to two support disk frames 1. The rotating disk frame 3 is sleeved on the connecting shaft 2 and is rotatably connected to the connecting shaft 2 through a rotating bearing 4. One end of the rotating disc frame 3 is also provided with a stroke movement guide shaft 9, and a stroke drive motor 10 is provided on the stroke movement guide shaft 9. The stroke drive motor 10 is used to drive the equipment to move axially along the inner wall of the pipe.

[0018] A shot blasting assembly 5 and a translational hopper 6 are arranged around the rotating disc frame 3. The shot blasting assembly 5 is used to blast sand into the inner wall of the pipe for cleaning, and the translational hopper 6 is used to feed sand into the shot blasting assembly 5. The translational hopper 6 is located at the feed end of the shot blasting assembly 5. A feed pipe 11 is provided on the side of the support frame 1 near the translational hopper 6. The feed pipe 11 is used to feed material into the translational hopper 6.

[0019] The translational hopper 6 includes a translational funnel 61 and a sand supply pipe 62. The sand supply pipe 62 is located at the bottom of the translational funnel 61 and is connected to the feed port of the shot blasting assembly 5.

[0020] The shot blasting assembly 5 includes a shot blasting motor 51, a shot blasting drive wheel 52, a shot blasting driven wheel 53, a shot blasting timing belt 54, a bushing 55, a shot blasting disc 56, a directional sleeve 57, a sand stirring disc 58, and a directional shot blasting protective cover 59. The shot blasting motor 51 is mounted on the support plate frame 1; The shot blasting drive wheel 52 is mounted on the output shaft of the shot blasting motor 51; The shot blasting driven wheel 53 is connected to the shot blasting driven wheel 52 via the shot blasting synchronous belt 54 to form a belt drive; The bushing 55 is fitted and fixed to the rotating shaft of the shot blasting driven wheel 53; The bottom surface of the directional sleeve 57 is connected to the end of the rotation shaft of the shot blasting driven wheel 53 away from the shot blasting motor 51; The throwing plate 56 is installed on the outside of the directional sleeve 57; The sand stirring disc 58 is installed on one side of the directional sleeve 57 and is located on the side of the shot blasting motor 51 of the shot blasting disc 56. The directional shot blasting protective cover 59 is installed on the outside of the shot blasting plate 56, and the directional shot blasting protective cover 59 and the shot blasting plate 56 form an internal space area; The sand supply pipe 62 passes through the directional shot blasting protective cover 59 and connects to the internal space area.

[0021] A drive pulley assembly 7 is provided on the rotating disk frame 3. The drive pulley assembly 7 is used to drive the rotating disk frame 3 to rotate relative to the connecting shaft 2. The drive pulley assembly 7 includes a drive drive pulley 71, a drive timing pulley 72, a first drive belt 73, and a first rotary motor 74. The first rotary motor 74 is mounted on the support plate frame 1, and the output shaft of the first rotary motor 74 is connected to the drive drive pulley 71. The drive timing pulley 72 is fixedly connected to the rotary plate frame 3. The first drive belt 73 is sleeved on the drive drive pulley 71 and the drive timing pulley 72.

[0022] The rotating disc frame 3 is also equipped with a translational pulley assembly 8, which is used to drive the translational hopper 6 to revolve around the connecting shaft 2 with the rotating disc frame 3, while keeping the translational hopper 6 itself from rotating.

[0023] The translational pulley assembly 8 includes a translational drive pulley 81, a translational synchronous pulley 82, and a second drive belt 83. The translational drive pulley 81 is fixedly installed on the connecting shaft 2, the translational synchronous pulley 82 is located on the outside of the translational hopper 6, and the second drive belt 83 is sleeved on the translational drive pulley 81 and the translational synchronous pulley 82.

[0024] The translational synchronous pulley 82 is mounted on the fixed bracket 85 via the rotating bearing 84. The fixed bracket 85 is fixed relative to the support plate frame 1. The translational hopper 6 is fixedly connected to the translational synchronous pulley 82. It is worth noting that the equipment is placed inside the pipe to be cleaned. External sand is fed into the translational funnel 61 through the feed pipe 11, and then enters the inner cavity of the directional shot blasting protective cover 59 of the shot blasting assembly 5 through the sand supply pipe 62. The shot blasting motor 51 drives the shot blasting drive wheel 52, which in turn drives the shot blasting driven wheel 53 to rotate at high speed via the shot blasting timing belt 54. Under the centrifugal force of the sand mixing disc 58, the sand is thrown to the blasting disc 56, and after being guided by the directional sleeve 57, it is evenly thrown onto the inner wall of the pipe.

[0025] Simultaneously, the first rotary motor 74 drives the rotating disc frame 3 to revolve around the connecting shaft 2 via the drive pulley assembly 7, causing the shot blasting assembly 5 to cover the entire inner wall. In the translational pulley assembly 8, the translational drive pulley 81, fixed to the connecting shaft 2, drives the translational synchronous pulley 82 via the second drive belt 83. Because the translational drive pulley 81 is fixed, it forces the translational hopper 6 to rotate in the opposite direction at the same speed during its revolution, thereby achieving spatial positioning lock and ensuring that the sand supply pipe 62 does not twist.

[0026] During the cleaning process, the stroke drive motor 10 pushes the equipment axially along the stroke movement guide shaft 9 to achieve continuous cleaning of the entire length of the pipeline.

[0027] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and all fall within the scope of the technical solution.

Claims

1. A pipe inner wall sandblasting and cleaning device, characterized in that, include: Two spaced-apart support trays (1) are used for the installation of the equipment and to isolate the equipment from flying sand and splashes during the cleaning process. The cleaning assembly includes a connecting shaft (2) and a rotating disk frame (3). The two ends of the connecting shaft (2) are respectively connected to two support disk frames (1). The rotating disk frame (3) is sleeved on the connecting shaft (2) and rotatably connected to the connecting shaft (2) through a rotating bearing (4). The rotating disc frame (3) is provided with a shot blasting assembly (5) and a translational hopper (6) on its periphery. The shot blasting assembly (5) is used to blast sand into the inner wall of the pipe for cleaning. The translational hopper (6) is used to feed sand into the shot blasting assembly (5). The translational hopper (6) is located at the feed end of the shot blasting assembly (5). The rotating disk frame (3) is provided with a drive pulley assembly (7), which is used to drive the rotating disk frame (3) to rotate relative to the connecting shaft (2); The rotating disc frame (3) is also provided with a translational pulley assembly (8), which is used to drive the translational hopper (6) to revolve around the connecting shaft (2) with the rotating disc frame (3), while keeping the translational hopper (6) itself from rotating.

2. The pipe inner wall sandblasting and cleaning equipment according to claim 1, characterized in that, One end of the rotating disc frame (3) is also provided with a stroke movement guide shaft (9), and a stroke drive motor (10) is provided on the stroke movement guide shaft (9). The stroke drive motor (10) is used to drive the equipment to move axially along the inner wall of the pipe.

3. The pipe inner wall sandblasting and cleaning equipment according to claim 1, characterized in that, The drive pulley assembly (7) includes a drive drive pulley (71), a drive timing pulley (72), a first drive belt (73), and a first rotary motor (74). The first rotary motor (74) is mounted on the support plate frame (1), and the output shaft of the first rotary motor (74) is connected to the drive drive pulley (71). The drive timing pulley (72) is fixedly connected to the rotary plate frame (3). The first drive belt (73) is sleeved on the drive drive pulley (71) and the drive timing pulley (72).

4. The pipe inner wall sandblasting and cleaning equipment according to claim 1, characterized in that, The translational pulley assembly (8) includes a translational drive pulley (81), a translational synchronous pulley (82), and a second drive belt (83). The translational drive pulley (81) is fixedly installed on the connecting shaft (2), the translational synchronous pulley (82) is located on the outside of the translational hopper (6), and the second drive belt (83) is sleeved on the translational drive pulley (81) and the translational synchronous pulley (82).

5. The pipe inner wall sandblasting and cleaning equipment according to claim 4, characterized in that, The translational synchronous pulley (82) is mounted on the fixed bracket (85) via a rotating bearing (84). The fixed bracket (85) is fixed relative to the support plate frame (1). The translational hopper (6) is fixedly connected to the translational synchronous pulley (82).

6. The pipe inner wall sandblasting and cleaning equipment according to claim 1, characterized in that, The translational hopper (6) includes a translational funnel (61) and a sand supply pipe (62). The sand supply pipe (62) is located at the bottom of the translational funnel (61) and is connected to the feed port of the shot blasting assembly (5).

7. The pipe inner wall sandblasting and cleaning equipment according to claim 6, characterized in that, The shot blasting assembly (5) includes a shot blasting motor (51), a shot blasting drive wheel (52), a shot blasting driven wheel (53), a shot blasting timing belt (54), a bushing (55), a shot blasting disc (56), a directional sleeve (57), a sand stirring disc (58), and a directional shot blasting protective cover (59). The shot blasting motor (51) is mounted on the support plate frame (1); The shot blasting drive wheel (52) is mounted on the output shaft of the shot blasting motor (51); The shot blasting driven wheel (53) is connected to the shot blasting driven wheel (53) through the shot blasting synchronous belt (54) to form a belt drive; The bushing (55) is fitted and fixed to the rotating shaft of the shot blasting driven wheel (53); The bottom surface of the directional sleeve (57) is connected to the end of the rotation axis of the shot blasting driven wheel (53) away from the shot blasting motor (51); The throwing disc (56) is installed on the outside of the directional sleeve (57); The sand stirring disc (58) is installed on one side of the directional sleeve (57) and is located on the side of the shot blasting disc (56) that is opposite to the shot blasting motor (51). The directional shot blasting protective cover (59) is installed on the outside of the shot blasting plate (56), and the directional shot blasting protective cover (59) and the shot blasting plate (56) form an internal space area; The sand supply pipe (62) passes through the directional shot blasting protective cover (59) and is connected to the internal space area.

8. The pipe inner wall sandblasting and cleaning equipment according to claim 1, characterized in that, The support plate frame (1) is provided with a feed pipe (11) on the side near the translational hopper (6), and the feed pipe (11) is used to feed the translational hopper (6).

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