A surface processing device for a steel pipe

Abstract

The present application relates to a kind of steel pipe surface processing device, including shot blasting assembly and the guide frame being arranged in the side of shot blasting assembly, the surface of the guide frame is provided with the conveying mechanism for conveying steel pipe and the temperature control mechanism for cooling steel pipe, the present application relates to steel pipe surface processing technical field.A kind of steel pipe surface processing device, realizes the active air cooling in the steel pipe inside in the process of shot blasting and positive pressure protection: by setting up by fan, chain wheel, chain, connecting block, rotating block and air outlet nozzle composition follow-up air blowing mechanism.Air outlet nozzle can be driven with chain and steel pipe synchronous movement, continuously blows into cooling air in the process of shot blasting inside steel pipe, effectively takes away heat, reduces pipe wall temperature;While forming positive pressure environment in the steel pipe inside, prevent dust and debris generated by shot blasting from entering steel pipe inner wall, eliminates subsequent inner wall cleaning process.

Description

Technical Field

[0001] This invention relates to the field of steel pipe surface processing technology, specifically to a steel pipe surface processing device. Background Technology

[0002] Shot blasting is a commonly used surface cleaning and strengthening process in steel pipe manufacturing. It involves high-speed jets of steel shot impacting the outer surface of the steel pipe to remove impurities such as oxide scale and rust. However, existing shot blasting equipment has significant technical drawbacks: First, the heat generated during shot blasting causes the steel pipe temperature to rise, which, if not cooled promptly, may affect the material's metallographic structure and mechanical properties. Second, metal dust and debris generated during shot blasting easily enter the inner wall of the steel pipe, making subsequent cleaning difficult and affecting product quality. Third, shot blasting equipment typically lacks an automatic cleaning function for the air filtration system, leading to easy clogging of the filter and affecting cooling airflow. Therefore, there is an urgent need in this field for a steel pipe surface processing device that can simultaneously cool and protect the inside and outside of the steel pipe during shot blasting, and possesses a self-cleaning function. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a surface processing device for steel pipes, which solves the problems mentioned above.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a surface processing device for steel pipes, comprising a shot blasting assembly and a guide frame disposed on the side of the shot blasting assembly, wherein the surface of the guide frame is provided with a conveying mechanism for conveying the steel pipes and a temperature control mechanism for cooling the steel pipes; The temperature control mechanism includes a fan fixed on the surface of the guide frame and two sprockets driven by a motor. The surfaces of the two sprockets are connected to chains, and the surfaces of the chains are fixedly connected to connecting blocks. The surfaces of the connecting blocks are driven by a driving mechanism to rotate blocks. The left side of the rotating blocks is connected to an air outlet. The air outlet of the fan is connected to the air outlet through an air outlet pipe. The surface of the air outlet is fixed with a sleeve, and the inner cavity of the sleeve is provided with a guide groove adapted to the steel pipe. The temperature control mechanism also includes a filter box fixed to the guide frame. The air inlet of the fan is connected to the inner cavity of the filter box through an exhaust pipe. A filter screen is provided on the surface of the filter box. A scraper is fixedly connected to the bottom of the connecting block. A scraper with a movement trajectory that coincides with the filter screen is fixedly connected to the back of the scraper.

[0005] As a further aspect of the present invention: the driving mechanism includes a rotary cylinder fixed to the side of the connecting block, with the piston end of the rotary cylinder connected to the inner cavity of the rotating block.

[0006] As a further aspect of the present invention: the filter screen has a built-in waterproof layer, which can filter moisture in the air.

[0007] As a further aspect of the present invention, the conveying mechanism includes guide wheels rotatably mounted on a guide frame.

[0008] As a further aspect of the present invention: the transmission speed of the chain is the same as the movement speed of the conveying mechanism. By rotating the rotating block, the air outlet is aligned with the side of the steel pipe, and then the movement is accelerated to insert into the inside of the steel pipe. Then, it follows up and blows air continuously when the steel pipe is shot blasted to remove the internal heat. It can also form a positive pressure environment inside to prevent impurities from entering the inner wall of the steel pipe, eliminating the need for subsequent cleaning.

[0009] As a further aspect of the present invention: a receiving cylinder located below the filter screen is fixedly connected to the surface of the filter box, and the dust scraped off by the scraper is collected through the receiving cylinder.

[0010] As a further aspect of the present invention, the surface of the guide frame is provided with support wheels for supporting the chain.

[0011] Compared with the prior art, the present invention has the following advantages: Active air cooling and positive pressure protection inside the steel pipe during shot blasting are achieved through a follow-up blower mechanism consisting of a fan, sprocket, chain, connecting block, rotating block, and air nozzle. The air nozzle moves synchronously with the steel pipe via chain drive, continuously blowing cooling air into the steel pipe during shot blasting, effectively removing accumulated heat and reducing the pipe wall temperature; at the same time, a positive pressure environment is created inside the steel pipe, preventing dust and debris generated during shot blasting from entering the inner wall of the steel pipe, eliminating the need for subsequent inner wall cleaning procedures.

[0012] Precise alignment and follow-up between the air nozzle and the steel pipe are achieved: a sleeve is fixed to the surface of the air nozzle, and the inner cavity of the sleeve has a guide groove that matches the steel pipe, facilitating the quick and accurate insertion of the air nozzle into the end of the steel pipe. The chain's transmission speed is the same as the movement speed of the conveying mechanism, ensuring that the air nozzle moves synchronously with the steel pipe after insertion, achieving continuous airflow throughout the shot blasting process and avoiding interruptions in airflow or nozzle detachment due to relative movement.

[0013] An automatic cleaning and dust collection function for the filtration system was implemented: a scraper is fixedly connected to the bottom of the connecting block, and bristles aligned with the movement trajectory of the filter screen are fixed to the back of the scraper. When the chain drives the system, the connecting block drives the scraper to move synchronously, and the bristles automatically scrape off the dust adhering to the surface of the filter screen, which falls into the receiving cylinder below. This design achieves online self-cleaning of the filter screen without an additional power source, ensuring unobstructed airflow to the fan and reducing the frequency of manual maintenance.

[0014] The air circulation path has been optimized, improving energy efficiency: the fan's air inlet is connected to the filter box via an exhaust duct. The filter screen has a built-in waterproof layer, which can filter moisture in the air and provide clean, dry cooling air for the blower. The filtered air is then sent to the air outlet through the exhaust duct, forming a closed-loop circulation and reducing dependence on the external environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 For the present invention Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a cross-sectional view of the sleeve of the present invention.

[0016] In the diagram: 1. Guide frame; 2. Shot blasting assembly; 3. Upper limit frame; 4. Sprocket; 5. Chain; 6. Support wheel; 7. Connecting block; 8. Rotating block; 9. Air outlet; 10. Sleeve; 11. Scraper; 12. Air outlet duct; 13. Guide groove; 14. Filter box; 15. Filter screen; 16. Receiving cylinder; 17. Fan; 18. Exhaust duct. Detailed Implementation

[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0018] Please see Figure 1-4 The present invention provides a technical solution: a surface processing device for steel pipes, including a shot blasting assembly 2 and a guide frame 1 disposed on the side of the shot blasting assembly 2. The surface of the guide frame 1 is provided with a conveying mechanism for conveying the steel pipe and a temperature control mechanism for cooling the steel pipe. The temperature control mechanism includes a fan 17 fixed on the surface of the guide frame 1 and two sprockets 4 driven by a motor. The surfaces of the two sprockets 4 are connected to chains 5. The surfaces of the chains 5 are fixedly connected to connecting blocks 7. The surfaces of the connecting blocks 7 are driven by a driving mechanism to rotate blocks 8. The left side of the rotating blocks 8 is connected to an air outlet 9. The air outlet of the fan 17 is connected to the air outlet 9 through an air outlet pipe 12. The surface of the air outlet 9 is fixed with a sleeve 10. The inner cavity of the sleeve 10 is provided with a guide groove 13 that is compatible with the steel pipe. The temperature control mechanism also includes a filter box 14 fixed to the guide frame 1. The air inlet of the fan 17 is connected to the inner cavity of the filter box 14 through the exhaust pipe 18. A filter screen 15 is provided on the surface of the filter box 14. A scraper 11 is fixedly connected to the bottom of the connecting block 7. A scraper with a movement trajectory that coincides with the filter screen 15 is fixedly connected to the back of the scraper 11.

[0019] The drive mechanism includes a rotary cylinder fixed to the side of the connecting block 7, with the piston end of the rotary cylinder connected to the inner cavity of the rotating block 8.

[0020] Filter 15 has a built-in waterproof layer that can filter moisture from the air.

[0021] The conveying mechanism includes guide wheels 6 that are rotatably mounted on the guide frame 1.

[0022] The transmission speed of chain 5 is the same as the movement speed of the conveying mechanism. By rotating the rotating block 8, the air outlet 9 is aligned with the side of the steel pipe, and then the movement is accelerated to insert into the inside of the steel pipe. Then it follows up and blows air continuously when the steel pipe is shot blasted to remove the internal heat. It can also create a positive pressure environment inside to prevent impurities from entering the inner wall of the steel pipe, eliminating the need for subsequent cleaning.

[0023] A receiving cylinder 16 located below the filter screen 15 is fixedly connected to the surface of the filter box 14, and the dust scraped off by the scraper 11 is collected through the receiving cylinder 16.

[0024] The surface of the guide frame 1 is provided with support wheels 6 for supporting the chain 5.

[0025] In use, the first stage of this invention involves connecting the steel pipe to the air nozzle. The steel pipe is conveyed forward along the guide frame via a conveying mechanism, such as guide wheels 6 on guide frame 1. Before the steel pipe enters the shot blasting assembly 2, the temperature control mechanism activates. A motor drives two sprockets 4 to rotate, and a chain 5 drives connecting blocks 7 to move along the same trajectory as the steel pipe conveying direction. The connecting blocks drive rotating blocks 8 via a drive mechanism, such as a rotary cylinder, aligning the air nozzle 9 with the end of the steel pipe. As the chain and steel pipe advance synchronously, the air nozzle is inserted into the steel pipe, and the guide groove 13 in the sleeve 10 assists in alignment, ensuring smooth insertion.

[0026] Phase Two: Follow-up Airflow and Positive Pressure Protection When the blower 17 starts, air is filtered through the filter 15 and enters the blower through the exhaust duct 18. It then flows through the exhaust duct 12 to the air outlet 9, continuously blowing cooling air into the steel pipe. Because the transmission speed of the chain 5 is the same as the movement speed of the conveyor mechanism, the air outlet remains relatively stationary with respect to the steel pipe after insertion, achieving continuous airflow throughout the shot blasting process. The cooling air flows through the inside of the steel pipe, carrying away the heat generated by shot blasting and reducing the pipe wall temperature. Simultaneously, a positive pressure environment is created inside the steel pipe, effectively preventing external dust and debris from entering.

[0027] Phase 3: Filter self-cleaning and dust collection During the chain drive, the scraper 11 at the bottom of the connecting block 7 moves accordingly. The scraper bristles on the back of the scraper contact the filter screen 15 on the surface of the filter box 14, scraping away the dust trapped on the filter screen surface. The scraped-off dust falls into the receiving cylinder 16 located below the filter screen for easy collection and cleaning. The built-in waterproof layer of the filter screen can intercept moisture in the air, ensuring that the air blown into the steel pipe is dry.

[0028] Phase 4: Completion of shot blasting and repositioning After the steel pipe has been shot blasted and transported to the unloading position, the air outlet 9 is simultaneously ejected from the steel pipe by the chain. The connecting block 7 rotates the rotating block 8 through the drive mechanism, moving the air outlet away to prepare for connection with the next steel pipe. Throughout the process, the support wheel 6 provides stable support to the chain, ensuring smooth transmission.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A surface processing device for steel pipes, comprising a shot blasting assembly (2) and a guide frame (1) disposed on the side of the shot blasting assembly (2), characterized in that: The surface of the guide frame (1) is provided with a conveying mechanism for conveying steel pipes and a temperature control mechanism for cooling steel pipes. The temperature control mechanism includes a fan (17) fixed on the surface of the guide frame (1) and two sprockets (4) driven by a motor. The surfaces of the two sprockets (4) are connected to chains (5). The surfaces of the chains (5) are fixedly connected to connecting blocks (7). The surfaces of the connecting blocks (7) are driven by a driving mechanism to rotate blocks (8). The left side of the rotating blocks (8) is connected to an air outlet (9). The air outlet of the fan (17) is connected to the air outlet (9) through an air outlet pipe (12). The surface of the air outlet (9) is fixed with a sleeve (10). The inner cavity of the sleeve (10) is provided with a guide groove (13) adapted to the steel pipe. The temperature control mechanism also includes a filter box (14) fixed on the guide frame (1). The air inlet of the fan (17) is connected to the inner cavity of the filter box (14) through the exhaust pipe (18). A filter screen (15) is provided on the surface of the filter box (14). A scraper (11) is fixedly connected to the bottom of the connecting block (7). A scraper with a movement trajectory that coincides with the filter screen (15) is fixedly connected to the back of the scraper (11).

2. The surface processing device for steel pipes according to claim 1, characterized in that: The drive mechanism includes a rotary cylinder fixed to the side of the connecting block (7), with the piston end of the rotary cylinder connected to the inner cavity of the rotating block (8).

3. The surface processing device for steel pipes according to claim 1, characterized in that: The filter (15) has a built-in waterproof layer that can filter moisture in the air.

4. The surface processing device for steel pipes according to claim 1, characterized in that: The conveying mechanism includes guide wheels that are rotatably mounted on a guide frame (1).

5. The surface processing device for steel pipes according to claim 1, characterized in that: The transmission speed of the chain (5) is the same as the movement speed of the conveying mechanism.

6. The surface processing device for steel pipes according to claim 1, characterized in that: The surface of the filter box (14) is fixedly connected to a receiving cylinder (16) located below the filter screen (15).

7. The surface processing device for steel pipes according to claim 1, characterized in that: The surface of the guide frame (1) is provided with support wheels (6) for supporting the chain (5).

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