A flow guide mixer

Abstract

This utility model discloses a flow-guiding agitator, relating to the field of stainless steel pipe cleaning technology. It includes a stirring shaft with a turbine impeller fixedly mounted on its shaft wall, and a tapered flow-guiding pipe positioned below the turbine impeller. The synergistic structure of the tapered flow-guiding pipe and turbine impeller provided by this utility model utilizes the flow-gathering effect of the flow-guiding pipe and the directional spraying of the flow-guiding holes to significantly enhance the fluid disturbance intensity at the bottom of the pickling tank without increasing the stirring speed, effectively solving the problem of media sedimentation. The spiral-shaped turbulence ribs combined with the staggered flow-guiding holes form a spiral upward flow inside the flow-guiding pipe. Simultaneously, the angle design of the upper and lower flow-guiding holes achieves three-dimensional circulation of the pickling solution within the tank, reducing the concentration difference between the upper and lower acid layers.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe cleaning technology, specifically to a flow guide agitator. Background Technology

[0002] In the pickling process of stainless steel pipes, the pickling solution in the pickling tank typically contains a high concentration of mixed acids such as hydrofluoric acid and nitric acid, used to remove oxide scale and rust layers from the surface of the steel pipes. However...

[0003] Existing stirring devices generally suffer from the following problems: Due to the low solubility of metal ions dissolved in the pickling medium, a supersaturated state is easily formed during stirring. Traditional stirrers lack a directional flow guidance structure, resulting in a flow dead zone at the bottom of the tank. Metal ions easily deposit at the bottom, forming hard scale, which not only affects the uniformity of the pickling reaction but also causes localized over-corrosion or incomplete pickling on the steel pipe surface. Existing stirring devices mostly use a single impeller structure, which can only form local radial flow and cannot achieve full tank circulation of the pickling solution. When processing large-diameter steel pipes, the axial thrust of ordinary stirrers is insufficient, which seriously affects the stability of pickling quality. In addition, when traditional stirrers operate in high-concentration acid solutions, the high fluid resistance results in high energy consumption and low stirring efficiency, and the pickling time is generally longer, increasing production costs. Utility Model Content

[0004] In view of the problems existing in the above-mentioned flow guide agitators, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a flow-guiding agitator that solves the problem of easy formation of supersaturation during the stirring process and the formation of flow dead zones at the bottom of the tank due to the lack of a directional flow-guiding structure in traditional agitators.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A flow-guiding agitator includes a stirring shaft, a turbine impeller fixedly mounted on the shaft wall, a conical flow-guiding tube disposed below the turbine impeller, three connecting rods fixedly mounted on the top of the conical flow-guiding tube, one end of each connecting rod being fixedly connected to the stirring shaft, multiple flow-guiding holes fixedly mounted on the outer wall of the conical flow-guiding tube, turbulence ribs fixedly mounted inside the conical flow-guiding tube, multiple flow-guiding grooves fixedly opened inside the turbine impeller, and an annular baffle fixedly mounted on the shaft wall of the stirring shaft.

[0007] Preferably, the bottom of the annular baffle is fixedly provided with a plurality of baffle rods, and one end of each baffle rod is fixedly provided with a hemispherical end.

[0008] Preferably, the upper surface of the annular baffle is provided with multiple guide ribs.

[0009] Preferably, the plurality of the guide ribs are arranged radially.

[0010] Furthermore, the height of the spoiler rib is 8mm.

[0011] Preferably, the diameter of the guide hole is 15 mm.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model features a synergistic structure of a conical guide tube and a turbine impeller. By utilizing the flow-gathering effect of the guide tube and the directional spraying of the guide holes, the fluid disturbance intensity at the bottom of the pickling tank is significantly enhanced without increasing the stirring speed, effectively solving the problem of media sedimentation. The spiral turbulence ribs combined with the staggered guide holes form a spiral upward flow inside the guide tube. At the same time, the angle design of the upper and lower guide holes realizes the three-dimensional circulation of the pickling solution in the tank, reducing the concentration difference between the upper and lower acid solutions.

[0013] 2. This invention ensures the long-term stable operation of the device in highly corrosive environments and avoids the sealing hazards associated with detachable structures. The annular baffle and turbulence-inducing rod further optimize the circulation path of the upper fluid, complementing the lower guide structure and completely eliminating the stirring dead zone. The design of the strip guide groove reduces the impeller's operating resistance, thereby shortening the pickling time and reducing production costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of part A; Figure 3 This is a schematic diagram of the three-dimensional structure of the turbulence rib of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Stirring shaft; 2. Turbine impeller; 3. Conical guide tube; 4. Connecting rod; 5. Guide hole; 6. Turbulence rib; 7. Guide groove; 8. Annular baffle; 9. Turbulence rod; 10. Hemispherical end; 11. Guide rib. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model discloses a flow-guiding stirrer.

[0019] This utility model provides, for example Figure 1-3The illustrated flow guide agitator includes a stirring shaft 1. A turbine impeller 2 is fixedly mounted on the shaft wall of the stirring shaft 1. A conical guide tube 3 is disposed below the turbine impeller 2. Three connecting rods 4 are fixedly mounted on the top of the conical guide tube 3, with one end of each connecting rod 4 fixedly connected to the stirring shaft 1. Multiple flow guide holes 5 are fixedly mounted on the outer wall of the conical guide tube 3. Turbulence ribs 6 are fixedly mounted inside the conical guide tube. Multiple flow guide grooves 7 are fixedly opened inside the turbine impeller 2. An annular baffle 8 is fixedly mounted on the shaft wall of the stirring shaft 1. When an external drive device drives the stirring shaft 1 to rotate, the turbine impeller 2, which is fixedly connected to the shaft wall of the stirring shaft 1, rotates synchronously. This impeller adopts a blade structure with a specific included angle distribution, and strip-shaped flow guide grooves extending along the length direction are opened on the blades. During rotation, the flow guide grooves can break the surface of the blades, greatly reducing the resistance of the pickling liquid to the impeller. At the same time, through the turbine impeller, the pickling liquid in the upper and middle parts of the pickling tank is pushed downward in a directional manner, forming a downward-pointing conical guide tube 3. Following the main flow trend, the turbine impeller 2 and the upper opening of the conical guide tube 3 maintain a suitable distance. This distance ensures that the fluid pushed by the impeller smoothly enters the guide tube, avoiding fluid impact turbulence caused by too small a distance or fluid dispersion and loss caused by too large a distance. This lays the foundation for subsequent flow convergence and mixing. After the pickling liquid pushed by the impeller enters the conical guide tube 3, due to the conical structure of the guide tube (wider at the top and narrower at the bottom), the fluid is forced to converge, and the flow velocity gradually increases along the axial direction of the guide tube. At the same time, the conical guide tube 3... The fixed spiral ribs on the inner wall play a crucial role. The converged fluid flows along the spiral trajectory of the ribs, forming a spiral upward flow. This flow pattern allows for strong radial mixing of the pickling solution within the guide tube, breaking the concentration gradient between fluid layers and uniformly dispersing dissolved metal ions into the fluid, preventing localized supersaturation. Under the action of the spiral upward flow, part of the pickling solution in the guide tube continues to flow downwards along the tube cavity to the lower opening, while the other part is directionally sprayed through two rows of staggered guide holes on the tube wall. The upper row of guide holes is inclined upwards for spraying... The outflowing fluid impacts the upper part of the pickling tank, forming a downward main flow pushed by the impeller. This breaks the limitations of traditional agitators, pushing the low-concentration pickling solution in the upper part downwards to replenish the fluid source at the inlet of the guide pipe. The lower row of guide holes is inclined downwards, and the ejected fluid directly acts on the bottom area of ​​the pickling tank, forming a strong bottom disturbance flow. This flow can impact the hard scale of metal ions that easily deposit at the bottom of the tank, preventing its adhesion. At the same time, it rolls the high-concentration pickling solution at the bottom upwards, integrating it into the spiral upward flow, completely eliminating the flow dead zone at the bottom of the tank. In addition, the annular guide edge at the lower opening edge of the conical guide pipe 3 can guide the fluid flowing out of the pipe cavity to diffuse to the bottom and surrounding areas, further enhancing the uniformity of the fluid at the bottom. The annular baffle 8 fixed in the middle of the agitator shaft 1 works in conjunction with the matching components. Vertical baffle rods are evenly distributed on the lower surface of the annular baffle 8. When the fluid pushed by the impeller converges in the guide pipe, the baffle rods can disturb the fluid around the upper part of the guide pipe.To prevent the formation of localized eddies and ensure a smooth flow of fluid into the guide tube, the radial guide ribs on the upper surface of the annular baffle 8 guide the fluid around the stirring shaft to diffuse towards the baffle edge, then flow downwards along the lower surface of the baffle to replenish the impeller inlet side, reducing power loss. The annular baffle itself can also block the fluid above the impeller, forcing more fluid to participate in the downward main flow, increasing the inflow rate into the guide tube, and enhancing overall stirring efficiency. To facilitate airflow disturbance, such as Figure 1 As shown, a plurality of baffle rods 9 are fixedly provided at the bottom of the annular baffle 8, and a hemispherical end 10 is fixedly provided at one end of each baffle rod 9.

[0020] To achieve better traffic redirection, such as Figure 1 As shown, the upper surface of the annular baffle 8 is provided with a plurality of guide ribs 11.

[0021] In order to better drive traffic, such as Figure 1 As shown, the plurality of the guide ribs 11 are arranged radially.

[0022] Finally, for better turbulence effect, such as Figure 1-3 As shown, the height of the turbulence rib 6 is 8mm, and the diameter of the flow guide hole 5 is 15mm.

[0023] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flow-guiding stirrer, comprising a stirring shaft (1), characterized in that, The stirring shaft (1) is fixedly provided with a turbine impeller (2), and a conical guide tube (3) is provided below the turbine impeller (2). Three connecting rods (4) are fixedly provided at the top of the conical guide tube (3). One end of the three connecting rods (4) is fixedly connected to the stirring shaft (1). Multiple guide holes (5) are fixedly provided on the outer wall of the conical guide tube (3). A turbulence rib (6) is fixedly provided inside the conical guide tube. Multiple guide grooves (7) are fixedly opened inside the turbine impeller (2). An annular baffle (8) is fixedly provided on the shaft wall of the stirring shaft (1).

2. The flow-guiding stirrer according to claim 1, characterized in that, The bottom of the annular baffle (8) is fixedly provided with a plurality of baffle rods (9), and one end of each baffle rod (9) is fixedly provided with a hemispherical end (10).

3. The flow-guiding stirrer according to claim 1, characterized in that, The upper surface of the annular baffle (8) is provided with multiple guide ribs (11).

4. The flow-guiding stirrer according to claim 3, characterized in that, The multiple guide ribs (11) are arranged radially.

5. A flow-guiding stirrer according to claim 1, characterized in that, The height of the bleed rib (6) is 8mm.

6. A flow-guiding stirrer according to claim 1, characterized in that, The diameter of the guide hole (5) is 15 mm.

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