Self-rotating spray head for cleaning inner wall of chemical pipeline
By combining gear speed increaser and magnetic speed limiter, low-speed cleaning of the inner wall of chemical pipelines is achieved, solving the problem that existing self-rotating nozzles cannot effectively clean the scale layer inside pipelines where alumina dissolves at high temperatures.
Patent Information
- Application Number
- CN202520152220.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Existing self-rotating nozzles have a large diameter and their rotation speed can only be controlled at over 500 rpm, which cannot effectively remove the scale layer inside the pipes where alumina dissolves at high temperatures.
By employing a gear speed-increasing mechanism and a magnetic speed-limiting component, the rotational speed is increased through gear transmission and limited by the magnetic speed-limiting component, achieving stable low-speed rotation of 40-80 rpm, thus solving the problem of space limitation.
It achieves low-speed cleaning of the inner wall of chemical pipelines, effectively removing scale and overcoming the problem that existing technologies cannot clean due to excessively high rotation speeds.
Smart Images
Figure CN223832556U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pipeline cleaning equipment, specifically a self-rotating nozzle for cleaning the inner wall of chemical pipelines. Background Technology
[0002] In the chemical industry, pipelines serve as the main channels for material transportation, and the cleanliness of their inner walls directly affects production efficiency and product quality. This is especially true for pipelines in the high-temperature section where alumina is leached, as their diameter is relatively small (generally 150mm to 300mm), the pipeline is long, and the inner walls of the pipeline are prone to forming thick and hard scale. Therefore, the cleaning and descaling of pipelines is particularly important.
[0003] Currently, existing self-rotating nozzles not only have a large diameter, but their rotation speed can generally only be controlled at 500 rpm or more, making it impossible to achieve low-speed control. For pipelines in the high-temperature section where alumina is leached, excessively high rotation speeds are actually unable to effectively remove the scale layer on the inner wall of the pipeline.
[0004] Therefore, it is necessary to propose a self-rotating nozzle for cleaning the inner walls of chemical pipelines to solve the above problems. Utility Model Content
[0005] Technical problem to be solved: The purpose of this utility model is to provide a self-rotating nozzle for cleaning the inner wall of chemical pipelines, so as to solve the problem mentioned in the background art that the existing self-rotating nozzles not only have a large diameter, but their rotation speed can generally only be controlled above 500 rpm, which cannot achieve low-speed control. For pipelines in the high-temperature section where alumina dissolves, the excessively high rotation speed cannot effectively remove the scale layer on the inner wall of the pipeline.
[0006] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: A self-rotating nozzle for cleaning the inner wall of chemical pipelines, comprising a housing, a transmission assembly, a magnetic speed limiting assembly, a rotating shaft, and a multi-hole nozzle. The transmission assembly and the magnetic speed limiting assembly are both housed within the housing. One end of the rotating shaft is rotatably mounted within the housing and connected to the transmission assembly. The multi-hole nozzle is fixedly mounted on the end of the rotating shaft furthest from the housing. The housing has an annular cavity concentrically arranged with the rotating shaft, and a water inlet channel connecting the annular cavity and the housing. A cavity is axially formed in the center of the rotating shaft, and a water inlet hole connecting the cavity and the annular cavity is formed on its circumference. Multiple first water outlets are evenly distributed along the circumference of the multi-hole nozzle, and each of the multiple first water outlets is connected to the cavity. The multi-hole nozzle has multiple inclined second water outlets on the circumference of the side facing the outer shell, all connected and offset from the center of the cavity. The second water outlets correspond one-to-one with the first water outlets and are interconnected. The transmission assembly includes a third rotating shaft rotatably installed in the outer shell along the axial direction, and also includes a first rotating shaft and a second rotating shaft spaced apart along the axial direction. The first rotating shaft and the second rotating shaft are both rotatably installed in the outer shell along the radial direction. The third rotating shaft is connected to the magnetic speed limiting assembly. A large bevel gear I is fixedly mounted on the rotating shaft. A small bevel gear I and a large gear are fixedly mounted on the first rotating shaft. A small gear and a large bevel gear II are fixedly mounted on the second rotating shaft. A small bevel gear II is rotatably mounted on the third rotating shaft. The large bevel gear I and the small bevel gear I, the large gear and the small gear, and the large bevel gear II and the small bevel gear II are all meshed and driven.
[0007] Preferably, sealing rings are fitted on the rotating shafts on both sides of the annular cavity, and the water delivery channel is arranged in a U-shape.
[0008] Preferably, the magnetic speed limiting component includes a fixed frame, a speed limiting magnetic ring, and a copper ring. The fixed frame is fixedly mounted on the end of the third rotating shaft away from the small bevel gear II. The speed limiting magnetic ring is fixedly mounted on the fixed frame. The copper ring is movably mounted on the outside of the speed limiting magnetic ring and is fixedly connected to the outer shell.
[0009] Preferably, the outer shell is detachably fixed together by a middle shell, a left shell, and a right end cover. Windows are provided on both the upper and lower sides of the middle shell, and sealing covers are detachably installed on the windows. A water inlet pipe is fixedly installed on the right end of the right end cover.
[0010] Preferably, the speed-limiting magnetic ring is formed by multiple permanent magnets surrounding it, the cross-section of the fixing frame is a regular polygon, the multiple permanent magnets are uniformly fixed on the side of the fixing frame, and the magnetic poles of adjacent permanent magnets are opposite at adjacent ends.
[0011] Beneficial Effects: Compared with the prior art, this utility model provides a self-rotating nozzle for cleaning the inner wall of chemical pipelines. This self-rotating nozzle has a unique structure and is easy to use. When water enters the nozzle from the inlet pipe, it first enters the annular cavity through the water delivery channel, and then enters the cavity inside the rotating shaft through the inlet hole. The water flow is ejected from the first outlet of the multi-hole nozzle. Because these outlets are offset from the axis of the cavity, torque is generated, driving the multi-hole nozzle and the connected rotating shaft to begin rotating. The large bevel gear I on the rotating shaft meshes with the small bevel gear I on the first rotating shaft. Initial speed increase is achieved. The large gear on the first rotating shaft meshes with the small gear to further increase speed and transmit power to the second rotating shaft. The large bevel gear II on the second rotating shaft meshes with the small bevel gear II on the third rotating shaft, ultimately transmitting power to the fixed frame in the magnetic speed limiting component. The fixed frame is equipped with a speed limiting magnetic ring, while the copper ring is movably sleeved on the outside of the speed limiting magnetic ring and fixedly connected to the outer shell. When the speed limiting magnetic ring rotates at high speed, the copper ring cuts the magnetic field lines of the speed limiting magnetic ring, thereby generating magnetic resistance and creating speed limiting resistance on the rotation of the speed limiting magnetic ring, thus limiting the rotation of the multi-hole nozzle and thus better cleaning the inner wall of the pipe.
[0012] Through the action of the gear speed-increasing mechanism and the magnetic speed-limiting component, this nozzle can achieve stable low-speed rotation at 40-80 rpm, which is a significant improvement compared to ordinary self-rotating nozzles, as ordinary nozzles can generally only be controlled above 500 rpm and cannot achieve low-speed control. In addition, this solution solves the design problem caused by space constraints when using two-dimensional rotating nozzles to clean pipes. It places the gear speed-increasing mechanism and magnetic damping in the middle of the annular water delivery channel without offset, which is especially important when the pipe diameter is as small as 150 mm. Attached Figure Description
[0013] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a front view schematic diagram of the structure of this utility model;
[0015] Figure 3 This is a top view of the structure of this utility model;
[0016] Figure 4 This utility model Figure 2 Schematic diagram of the cross section at point AA;
[0017] Figure 5 This utility model Figure 2 Schematic diagram of the cross section at point BB;
[0018] Figure 6 This utility model Figure 3 Cross-sectional view at point CC;
[0019] Figure 7 This utility model Figure 4 Enlarged schematic diagram of the structure in area A;
[0020] Figure 8 This utility model Figure 6 Enlarged schematic diagram of the structure in region B;
[0021] Figure 9 This is a cross-sectional schematic diagram of the magnetic speed limiting component of this utility model.
[0022] In the diagram: 1. Outer shell; 101. Middle shell; 102. Left shell; 103. Sealing cap; 104. Right end cap; 105. Water inlet pipe; 2. Transmission assembly; 3. Magnetic speed limiting assembly; 4. Rotating shaft; 5. Multi-hole nozzle; 6. Cavity; 7. First water outlet; 8. Second water outlet; 9. Annular cavity; 10. Water inlet hole; 11. Water delivery channel; 12. Large bevel gear I; 13. First rotating shaft; 14. Second rotating shaft; 15. Third rotating shaft; 16. Small bevel gear I; 17. Large gear; 18. Small gear; 19. Large bevel gear II; 20. Small bevel gear II; 21. Fixing frame; 22. Speed limiting magnetic ring; 23. Copper ring. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Example 1: This Example 1 provides a self-rotating nozzle for cleaning the inner walls of chemical pipelines. It is a direct improvement on existing self-rotating nozzles, with a unique structure. Please refer to [link / reference]. Figure 1-9 As shown, the device includes a housing 1, a transmission assembly 2, a magnetic speed limiting assembly 3, a rotating shaft 4, and a multi-hole nozzle 5. The transmission assembly 2 and the magnetic speed limiting assembly 3 are both housed inside the housing 1. One end of the rotating shaft 4 is rotatably mounted inside the housing 1 and is connected to the transmission assembly 2. The multi-hole nozzle 5 is fixedly mounted on the end of the rotating shaft 4 away from the housing 1. The housing 1 has an annular cavity 9 concentrically arranged with the rotating shaft 4, and a water supply channel 11 connecting the annular cavity 9 and the water inlet of the housing 1. The rotating shaft 4 has a cavity 6 axially arranged in the middle, and a water inlet hole 10 connecting the cavity 6 and the annular cavity 9 is opened on the periphery of the rotating shaft 4. Sealing rings are fitted on the rotating shaft 4 on both sides of the annular cavity 9. The water supply channel 11 is arranged in a U-shape.
[0025] The outer casing 1 is detachably fixed together by a middle casing 101, a left casing 102, and a right end cover 104. Windows are provided on both the upper and lower sides of the middle casing 101, and sealing covers 103 are detachably installed on the windows. A water inlet pipe 105 is fixedly installed on the right end of the right end cover 104. The components of the outer casing 1 can be connected in various ways, such as by bolts. The water inlet pipe 105 is connected to the water supply channel 11. Multiple first water outlets 7 are evenly distributed around the periphery of the multi-hole nozzle 5. All first water outlets 7 are connected to the cavity 6 and are offset from the axis of the cavity 6. 5. Multiple inclined second water outlets 8 are provided on one side of the outer casing 1 along the circumference. The second water outlets 8 correspond one-to-one with the first water outlets 7 and are interconnected. The transmission assembly includes a third rotating shaft 15 that is rotatably installed in the outer casing 1 along the axial direction, and also includes a first rotating shaft 13 and a second rotating shaft 14 that are spaced apart along the axial direction. The first rotating shaft 13 and the second rotating shaft 14 are both rotatably installed in the outer casing 1 along the radial direction. The third rotating shaft 15 is connected to the magnetic speed limiting assembly 3. The two ends of the first rotating shaft 13 and the second rotating shaft 14 are rotatably installed on the sealing cover 103 on the adjacent side through bearings.
[0026] A large bevel gear I12 is fixedly mounted on the rotating shaft 4; a small bevel gear I16 and a large gear 17 are fixedly mounted on the first rotating shaft 13; a small gear 18 and a large bevel gear II19 are fixedly mounted on the second rotating shaft 14; and a small bevel gear II20 is rotatably mounted on the third rotating shaft 15. The large bevel gear I12 meshes with the small bevel gear I16, the large gear 17 with the small gear 18, and the large bevel gear II19 with the small bevel gear II20. The magnetic speed limiting assembly 3 includes a fixed... The frame 21, the speed-limiting magnetic ring 22, and the copper ring 23 are fixedly mounted on the end of the third rotating shaft 15 away from the small bevel gear II 20. The speed-limiting magnetic ring 22 is fixedly mounted on the frame 21. The copper ring 23 is movably mounted on the outside of the speed-limiting magnetic ring 22 and fixedly connected to the outer shell 1. When the speed-limiting magnetic ring 22 rotates at high speed, the copper ring 23 will cut the magnetic field lines of the speed-limiting magnetic ring 22, thereby generating speed-limiting resistance on the rotation of the speed-limiting magnetic ring 22, thus achieving the function of magnetic speed limiting.
[0027] Working principle: When we use this nozzle to clean the inner wall of the chemical pipeline, the water flows from the inlet pipe 105 through the water delivery channel 11 into the annular cavity 9, then through the inlet hole 10 into the cavity 6, and finally sprays out from the first outlet 7. Since the first outlet 7 is offset from the axis of the cavity 6, the water flow will generate torque when it sprays out from the first outlet 7, thereby driving the multi-hole nozzle 5 to rotate. No additional power is required. When the multi-hole nozzle 5 rotates, it will drive the rotating shaft 4 to rotate. Then, through the speed increase of multiple gears, the speed of the speed limiting magnetic ring 22 will increase. This will increase the magnetic resistance generated by the cutting of magnetic lines of force between the speed limiting magnetic ring 22 and the copper ring 23, thereby limiting the rotation of the multi-hole nozzle 5 in the opposite direction, thus achieving low-speed rotation of the multi-hole nozzle 5.
[0028] Example 2: The difference between Example 2 and Example 1 is as follows: Figure 9 As shown, the speed-limiting magnetic ring 22 is composed of multiple permanent magnets. The cross-section of the fixing frame 21 is a regular polygon. The multiple permanent magnets are uniformly fixed on the side of the fixing frame 21, and the magnetic poles of adjacent permanent magnets are opposite. When the speed-limiting magnetic ring 22 rotates, the copper ring 23 cuts a constantly changing magnetic field, thereby increasing the rate of change of magnetic flux passing through the copper ring 23. According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force is proportional to the rate of change of magnetic flux. Therefore, the induced electromotive force generated inside the copper ring 23 will also increase accordingly, thereby generating greater speed-limiting resistance on the fixing frame 21 and improving the speed-limiting effect.
[0029] 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 self-rotating nozzle for cleaning the inner wall of chemical pipelines, comprising a housing (1), characterized in that: It also includes a transmission assembly (2), a magnetic speed limiting assembly (3), a rotating shaft (4), and a multi-hole nozzle (5). The transmission assembly (2) and the magnetic speed limiting assembly (3) are both disposed inside the housing (1). One end of the rotating shaft (4) is rotatably mounted inside the housing (1) and is connected to the transmission assembly (2) for transmission. The multi-hole nozzle (5) is fixedly mounted on the end of the rotating shaft (4) away from the housing (1). The housing (1) has an annular cavity (9) arranged concentrically with the rotating shaft (4) and also has a connecting annular cavity. (9) A water supply channel (11) is connected to the water inlet of the outer shell (1). A cavity (6) is provided in the middle of the rotating shaft (4) along the axial direction. A water inlet hole (10) connecting the cavity (6) and the annular cavity (9) is provided on the circumference of the rotating shaft (4). A plurality of first water outlets (7) are evenly provided on the circumference of the multi-hole nozzle (5). The plurality of first water outlets (7) are all connected to the cavity (6) and are all offset from the axis of the cavity (6). A plurality of inclined holes are provided on the side of the multi-hole nozzle (5) facing the outer shell (1) along the circumference. The second water outlet (8) is provided, and the second water outlet (8) corresponds one-to-one with the first water outlet (7) and is interconnected with each other; the transmission assembly (2) includes a third rotating shaft (15) rotatably installed in the housing (1) along the axial direction, and also includes a first rotating shaft (13) and a second rotating shaft (14) spaced apart along the axial direction, and the first rotating shaft (13) and the second rotating shaft (14) are both rotatably installed in the housing (1) along the radial direction, and the third rotating shaft (15) is connected to the magnetic speed limiting assembly (3) for transmission; the rotating shaft (4) A large bevel gear I (12) is fixedly mounted on the first shaft (13), a small bevel gear I (16) and a large gear (17) are fixedly mounted on the first shaft (13), a small gear (18) and a large bevel gear II (19) are fixedly mounted on the second shaft (14), and a small bevel gear II (20) is rotatably mounted on the third shaft (15). The large bevel gear I (12) meshes with the small bevel gear I (16), the large gear (17) meshes with the small gear (18), and the large bevel gear II (19) meshes with the small bevel gear II (20).
2. The self-rotating nozzle for cleaning the inner wall of chemical pipelines according to claim 1, characterized in that: Sealing rings are fitted on the rotating shafts (4) on both sides of the annular cavity (9), and the water conveying channel (11) is arranged in a U-shape.
3. A self-rotating nozzle for cleaning the inner wall of chemical pipelines according to claim 1, characterized in that: The magnetic speed limiting component (3) includes a fixed frame (21), a speed limiting magnetic ring (22) and a copper ring (23). The fixed frame (21) is fixedly mounted on the end of the third rotating shaft (15) away from the small bevel gear II (20). The speed limiting magnetic ring (22) is fixedly mounted on the fixed frame (21). The copper ring (23) is movably mounted on the outside of the speed limiting magnetic ring (22) and is fixedly connected to the outer shell (1).
4. A self-rotating nozzle for cleaning the inner wall of chemical pipelines according to claim 1, characterized in that: The outer shell (1) is detachably fixed together by the middle shell (101), the left shell (102) and the right end cover (104). The upper and lower sides of the middle shell (101) are provided with windows, and the windows are detachably fitted with sealing covers (103). The right end of the right end cover (104) is fixedly fitted with a water inlet pipe (105).
5. A self-rotating nozzle for cleaning the inner wall of chemical pipelines according to claim 3, characterized in that: The speed-limiting magnetic ring (22) is composed of multiple permanent magnets. The cross-section of the fixing frame (21) is a regular polygon. The multiple permanent magnets are uniformly fixed on the side of the fixing frame (21), and the magnetic poles of adjacent permanent magnets are opposite.