High-temperature pressure-bearing pipeline for large boiler

Abstract

The high-temperature pressure-bearing pipeline for the large boiler comprises a pipeline body, a cleaning ring is arranged in the pipeline body, idler wheels are evenly installed in the cleaning ring in an annular array mode, the idler wheels are rotatably installed in the cleaning ring through a first rotating shaft, and a motor is installed at one end of each idler wheel. When the inner wall of the pipeline body needs to be cleaned, the motor drives the first rotating shaft to rotate, the first rotating shaft rotates to drive the rolling wheels to rotate, so that the cleaning ring moves in the pipeline body, and the cleaning ring moves to drive the scraping rings to move; scale and dirt on the inner wall of the pipeline body are scraped in the moving process of the scraping ring, and the influence of the scale on the heat conduction efficiency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, specifically a high-temperature pressure pipeline for large boilers. Background Technology

[0002] High-temperature pressure pipelines, also known as high-pressure pipelines, are pipelines that can withstand the impact and temperature changes of high-pressure media, as well as the effects of corrosion and wear that may occur during transportation. They are widely used in industrial production fields such as petrochemicals, fertilizers, liquefied gas, power, and nuclear industry. They are the main way to transport large quantities of high-pressure and high-temperature thermal media. Among them, high-temperature pressure pipelines play a key role in large boiler systems.

[0003] A search revealed a patent, CN209414792U, which describes a 660°C to 760°C high-temperature steam pipeline with interlayer insulation and pressure resistance. The pipeline includes an inner wall made of nickel-based alloy for steam flow at temperatures of 660°C to 760°C and pressures of 1MPa to 45MPa. An insulation layer is provided outside the inner wall, and an intermediate wall made of P92 or P91 steel is provided outside the insulation layer. An outer wall made of P92 or P91 steel is located outside the intermediate wall. An annular interlayer for cooling fluid flow is formed between the intermediate and outer walls. The inner wall, insulation layer, and intermediate wall constitute a composite pipe wall. This multi-layered wall structure, composed of nickel-based alloy, high-temperature insulation material, and P92 or P91 steel, along with the annular interlayer insulation and pressure resistance, replaces the single-layer nickel-based alloy pipe, significantly reducing the cost of the 660°C to 760°C high-temperature steam pipeline.

[0004] When high-temperature pressure pipes are used in large boilers, the boiler water contains a lot of minerals such as calcium and magnesium. These minerals easily react with bicarbonate ions in the water at high temperatures to form insoluble substances such as calcium carbonate and magnesium carbonate, which then deposit inside the pipes to form scale. If the scale and dirt are not cleaned in time, they will adhere to the inside of the pipes, reduce heat transfer efficiency, lead to energy loss, and affect the thermal efficiency of the boiler. Utility Model Content

[0005] The purpose of this utility model is to provide a high-temperature pressure-bearing pipeline for large boilers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature pressure-bearing pipe for a large boiler, comprising a pipe body, a cleaning ring disposed inside the pipe body, rollers uniformly installed in a circular array inside the cleaning ring, the rollers being rotatably mounted inside the cleaning ring via a first rotating shaft, a motor being installed at one end of the rollers, and scraper rings being installed on both sides of the cleaning ring.

[0007] As a further preferred embodiment of this technical solution, the scraper ring has a storage groove inside.

[0008] As a further preferred embodiment of this technical solution, a first annular rack is fixedly installed inside the scraper ring, a first gear is meshed with the bottom end of the first annular rack, a second rotating shaft is fixedly installed at one end of the first gear, a second bevel gear is fixedly connected to the end of the second rotating shaft away from the first gear, a first bevel gear is meshed with one side of the second bevel gear, and the first bevel gear is fixedly installed at one end of the first rotating shaft.

[0009] As a further preferred embodiment of this technical solution, a cleaning ring is installed on the side of the scraper ring away from the cleaning ring, and bristles are fixedly installed on the outer wall of the cleaning ring.

[0010] As a further preferred embodiment of this technical solution, the cleaning ring has an installation groove inside, a third rotating shaft is embedded inside the installation groove, and a rotating block is fixedly installed at one end of the third rotating shaft.

[0011] As a further preferred embodiment of this technical solution, the mounting slots are evenly distributed in a ring array.

[0012] As a further preferred embodiment of this technical solution, a second gear is fixedly installed at one end of the third rotating shaft, and a second annular rack is meshed with the bottom end of the second gear, the second annular rack being fixedly installed inside the scraper ring.

[0013] This utility model provides a high-temperature pressure-bearing pipeline for large boilers, which has the following beneficial effects:

[0014] (1) By setting up a scraper ring, when it is necessary to clean the inner wall of the pipe body, the first rotating shaft is driven by a motor to rotate. The rotation of the first rotating shaft drives the roller to rotate, thereby moving the cleaning ring inside the pipe body. The movement of the cleaning ring causes the scraper ring to move, so that the scraper ring scrapes the scale and dirt on the inner wall of the pipe body during the movement, reducing the impact of scale on heat transfer efficiency.

[0015] (2) The present invention uses a rotating connection between the scraper ring and the cleaning ring. When the first rotating shaft rotates, it drives the first bevel gear to rotate. The rotation of the first bevel gear drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the second rotating shaft. The rotation of the second rotating shaft drives the rotation of the first gear. The rotation of the first gear drives the rotation of the first ring rack. The rotation of the first ring rack drives the rotation of the scraper ring, thereby improving the cleaning effect on scale. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the cleaning ring structure of this utility model;

[0019] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 5 This is a cross-sectional view of the scraper ring structure of this utility model.

[0021] In the diagram: 1. Pipe body; 2. Cleaning ring; 3. Roller; 4. First rotating shaft; 5. Motor; 6. First bevel gear; 7. Second bevel gear; 8. First gear; 9. Second rotating shaft; 10. First ring rack; 11. Scraper ring; 12. Cleaning ring; 13. Bristles; 14. Second ring rack; 15. Second gear; 16. Third rotating shaft; 17. Rotating block; 18. Storage tank; 19. Installation tank. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figures 1 to 5 As shown in this embodiment, a high-temperature pressure-bearing pipe for a large boiler includes a pipe body 1. A cleaning ring 2 is provided inside the pipe body 1. Rollers 3 are evenly installed in a circular array inside the cleaning ring 2. The rollers 3 are rotatably installed inside the cleaning ring 2 via a first rotating shaft 4. A motor 5 is installed at one end of the rollers 3. Scraper rings 11 are installed on both sides of the cleaning ring 2.

[0024] When it is necessary to clean the inner wall of the pipe body 1, the first rotating shaft 4 is driven to rotate by the motor 5. The rotation of the first rotating shaft 4 drives the roller 3 to rotate, thereby causing the cleaning ring 2 to move inside the pipe body 1. The movement of the cleaning ring 2 causes the scraper ring 11 to move, so that the scraper ring 11 scrapes away the scale and dirt on the inner wall of the pipe body 1 during the movement, reducing the impact of scale on heat transfer efficiency.

[0025] like Figure 4 As shown, a storage groove 18 is provided inside the scraper ring 11.

[0026] The outer wall of the scraper ring 11 is inclined on the side that contacts the inner wall of the pipe body 1. When scraping off scale, the scraped scale can be guided into the storage tank 18 for collection, which is convenient for unified cleaning later.

[0027] like Figure 5 As shown, a first annular rack 10 is fixedly installed inside the scraper ring 11. A first gear 8 is meshed with the bottom end of the first annular rack 10. A second rotating shaft 9 is fixedly installed at one end of the first gear 8. A second bevel gear 7 is fixedly connected to the end of the second rotating shaft 9 away from the first gear 8. A first bevel gear 6 is meshed with one side of the second bevel gear 7. The first bevel gear 6 is fixedly installed at one end of the first rotating shaft 4.

[0028] When the first rotating shaft 4 rotates, it drives the first bevel gear 6 to rotate. The rotation of the first bevel gear 6 drives the second bevel gear 7 to rotate. The rotation of the second bevel gear 7 drives the second rotating shaft 9 to rotate. The rotation of the second rotating shaft 9 drives the first gear 8 to rotate. The rotation of the first gear 8 drives the first annular rack 10 to rotate. The rotation of the first annular rack 10 drives the scraper ring 11 to rotate, thereby improving the cleaning effect on scale.

[0029] like Figures 1 to 5 As shown, a cleaning ring 12 is installed on the side of the scraper ring 11 away from the cleaning ring 2, and bristles 13 are fixedly installed on the outer wall of the cleaning ring 12.

[0030] As the cleaning ring 2 moves, it drives the cleaning ring 12 to move, allowing the bristles 13 to clean the inner wall of the pipe body 1 again. This, in conjunction with the scraping ring 11, improves the cleaning effect on the scale on the inner wall of the pipe body 1.

[0031] like Figures 1 to 5 As shown, the cleaning ring 12 has an installation groove 19 inside, and a third rotating shaft 16 is embedded inside the installation groove 19. A rotating block 17 is fixedly installed at one end of the third rotating shaft 16.

[0032] When the cleaning ring 12 needs to be removed for maintenance, rotate the rotating block 17 so that the rotating block 17 is parallel to the position of the mounting groove 19, and then pull the cleaning ring 12 outward so that the mounting groove 19 slides out from the outer wall of the rotating block 17.

[0033] like Figures 1 to 5 As shown, the mounting slots 19 are evenly distributed in a ring array.

[0034] like Figure 5 As shown, a second gear 15 is fixedly installed at one end of the third rotating shaft 16, and a second annular rack 14 is meshed at the bottom end of the second gear 15. The second annular rack 14 is fixedly installed inside the scraper ring 11.

[0035] When the cleaning ring 12 is removed for maintenance, the rotation of the rotating block 17 drives the rotation of the third rotating shaft 16, the rotation of the third rotating shaft 16 drives the rotation of the second gear 15, and the rotation of the second gear 15 drives the rotation of the second ring rack 14, so that several rotating blocks 17 rotate synchronously, making it easy to remove the cleaning ring 12.

[0036] This utility model provides a high-temperature pressure-bearing pipeline for large boilers, and its specific working principle is as follows:

[0037] When it is necessary to clean the inner wall of the pipe body 1, the first rotating shaft 4 is driven to rotate by the motor 5. The rotation of the first rotating shaft 4 drives the roller 3 to rotate, thereby causing the cleaning ring 2 to move inside the pipe body 1. The movement of the cleaning ring 2 causes the scraper ring 11 to move, so that the scraper ring 11 scrapes away the scale and dirt on the inner wall of the pipe body 1 during the movement.

[0038] When the first rotating shaft 4 rotates, it drives the first bevel gear 6 to rotate. The rotation of the first bevel gear 6 drives the second bevel gear 7 to rotate. The rotation of the second bevel gear 7 drives the second rotating shaft 9 to rotate. The rotation of the second rotating shaft 9 drives the first gear 8 to rotate. The rotation of the first gear 8 drives the first annular rack 10 to rotate. The rotation of the first annular rack 10 drives the scraper ring 11 to rotate. The rotation of the scraper ring 11 drives the cleaning ring 12 to rotate. The rotation of the cleaning ring 12 drives the brush bristles 13 to rotate and clean the scale on the inner wall of the pipe body 1.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature pressure-bearing pipeline for a large boiler, comprising a pipeline body (1), characterized in that: The pipe body (1) is provided with a cleaning ring (2) inside. Rollers (3) are evenly installed in a ring array inside the cleaning ring (2). The rollers (3) are rotatably installed inside the cleaning ring (2) via a first rotating shaft (4). A motor (5) is installed at one end of the rollers (3). Scraper rings (11) are installed on both sides of the cleaning ring (2).

2. The high-temperature pressure-bearing pipeline for a large boiler according to claim 1, characterized in that: The scraper ring (11) has a storage groove (18) inside.

3. The high-temperature pressure-bearing pipeline for a large boiler according to claim 1, characterized in that: The scraper ring (11) is fixedly installed with a first annular rack (10). The bottom end of the first annular rack (10) is meshed with a first gear (8). One end of the first gear (8) is fixedly installed with a second rotating shaft (9). The end of the second rotating shaft (9) away from the first gear (8) is fixedly connected with a second bevel gear (7). One side of the second bevel gear (7) is meshed with a first bevel gear (6). The first bevel gear (6) is fixedly installed at one end of the first rotating shaft (4).

4. A high-temperature pressure-bearing pipeline for a large boiler according to claim 1, characterized in that: A cleaning ring (12) is installed on the side of the scraper ring (11) away from the cleaning ring (2), and bristles (13) are fixedly installed on the outer wall of the cleaning ring (12).

5. A high-temperature pressure-bearing pipeline for a large boiler according to claim 4, characterized in that: The cleaning ring (12) has an installation groove (19) inside, and a third rotating shaft (16) is embedded inside the installation groove (19). A rotating block (17) is fixedly installed at one end of the third rotating shaft (16).

6. A high-temperature pressure-bearing pipeline for a large boiler according to claim 5, characterized in that: The mounting slots (19) are evenly distributed in a ring array.

7. A high-temperature pressure-bearing pipeline for a large boiler according to claim 5, characterized in that: A second gear (15) is fixedly installed at one end of the third rotating shaft (16), and a second annular rack (14) is meshed at the bottom end of the second gear (15). The second annular rack (14) is fixedly installed inside the scraper ring (11).

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