Modular adjustable impeller

Abstract

This utility model discloses a modular adjustable stirring paddle, comprising: a central shaft; the central shaft is cylindrical and extends vertically; at least two sets of radial stirring blade assemblies; the radial stirring blade assemblies are installed with adjustable vertical spacing along the central shaft; each radial stirring blade assembly includes a first stirring blade and a second stirring blade, each having a first semi-circular joining portion at its inner end and an oblique through hole at its outer end; the depth direction of the oblique through hole is set at an angle to the central shaft; the two first semi-circular joining portions of the radial stirring blade assembly are joined to form a first locking ring matching the outer diameter of the central shaft, and the first locking ring is fastened and fixed to the central shaft by a first fastener. Thus, the number and vertical spacing of the radial stirring blade assemblies can be set according to different barrel depths and different mixing intensity requirements. Simultaneously, the oblique through holes can be used as mounting holes or reserved as mixing through holes to reduce the resistance experienced by the stirring blades, which is beneficial for improving mixing uniformity.

Description

Technical Field

[0001] This utility model relates to the field of mixing devices, and in particular to a modular adjustable stirring paddle, mainly used for mixing chemical emulsions, solvents, etc. Background Technology

[0002] Stirring chemical emulsions, solvents, slurries, etc., requires automatic stirring equipment. This equipment includes a motor and a stirring paddle driven by the motor. Common stirring paddles include the following types: 1. The stirring paddle is an integral structure, such as a stirring assembly, including at least one set of stirring shafts and a plurality of stirring blades disposed on the stirring shafts. The stirring shaft includes a metal square column extending along the Z-axis, and the periphery of the metal square column has a first side, a second side, a third side, and a fourth side arranged sequentially adjacent to each other. The stirring blades are defined as a first blade, a second blade, a third blade, and a fourth blade. The first blade, the second blade, the third blade, and the fourth blade are all inclined to form an acute angle with the horizontal plane, and are connected one by one to the first side, the second side, the third side, and the fourth side.

[0003] 2. The stirring paddle is an assembled structure, such as a stirring device, including a stirring shaft. The stirring shaft is radially symmetrically provided with a first mounting hole and a second mounting hole. A mounting sleeve is connected in the first mounting hole, and a positioning sleeve is connected in the second mounting hole. A first stirring arm is provided in the mounting sleeve, and a second stirring arm is provided in the positioning sleeve. A first stirring blade is connected to the first stirring arm, and a second stirring blade is connected to the second stirring arm.

[0004] It is evident that most commonly used agitators are custom-made for specific mixing tanks and mixing requirements. Once custom-made, these agitators cannot be adjusted to suit other mixing tanks or different materials requiring different mixing methods. This presents some drawbacks. For example, factories that need to mix chemical emulsions or solvents require a large quantity of agitators. Of course, if a similar factory requires an even larger total number of agitators, each model needs to be custom-made, resulting in higher manufacturing costs.

[0005] Based on the applicant's understanding and research on the application needs of agitators in the industry, for materials of different barrel depths and viscosities within a certain depth range, the length of the central axis can remain unchanged, but the number and spacing of the agitator blades may vary slightly, which involves the mixing intensity requirements and whether wall scraping is required. Therefore, how to study an agitator that can take cost into account and meet the needs of materials of different barrel depths and viscosities has become an important topic. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a modular adjustable stirring paddle, which can set the number of radial stirring blades and the vertical spacing between them according to different barrel depths and different stirring and mixing intensity requirements. At the same time, the oblique through holes can be used as mounting holes or reserved as mixing through holes to reduce the resistance of the stirring blades and improve the mixing uniformity.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A modular adjustable stirring paddle, comprising: A central axis; the central axis is cylindrical and extends vertically. At least two sets of radial stirring blade assemblies are provided; the radial stirring blade assemblies are installed with adjustable spacing along the central axis; each radial stirring blade assembly includes a first stirring blade and a second stirring blade, the inner ends of which are respectively provided with a first semi-circular splicing portion, and the outer ends of which are respectively provided with oblique through holes; the depth direction of the oblique through holes is set at an angle to the central axis; the two first semi-circular splicing portions of the radial stirring blade assembly are spliced ​​together to form a first locking ring that matches the outer diameter of the central axis, and the first locking ring is fastened and fixed to the central axis by a first fastener.

[0008] As a preferred embodiment, a bottom material scraper assembly can be detachably installed below the lowest radial stirring blade assembly on the central shaft; the bottom material scraper assembly includes a first scraper and a second scraper, the inner ends of which are respectively provided with a second semi-circular splicing part, and the outer ends of which are respectively provided with an arc-shaped scraper frame and a plurality of first scraping rubber sheets installed on the arc-shaped scraper frame; the second semi-circular splicing parts are spliced ​​to form a second locking ring that matches the outer diameter of the central shaft, and the second locking ring is clamped and fixed to the central shaft by a second fastener.

[0009] As a preferred embodiment, the plane containing the first scraping film is inclined at an angle of 10° to 45° to the corresponding radial direction.

[0010] As a preferred embodiment, an anti-scraping scraper assembly is detachably installed at the oblique through hole.

[0011] As a preferred embodiment, the anti-scraping scraper assembly includes a mounting plate, a hinge plate, a torsion spring, and a second scraping film. The mounting plate is detachably mounted on the oblique through hole. The hinge plate is hinged relative to the mounting plate. The torsion spring is disposed between the mounting plate and the hinge plate to provide the hinge plate with rotational reset elasticity. The second scraping film is mounted on the hinge plate.

[0012] As a preferred embodiment, the anti-wall scraper assemblies of multiple radial stirring blade assemblies are connected in series by axial connecting plates. The axial connecting plates are connected to the oblique through holes of each radial stirring blade assembly, and the axial connecting plates provide several transition holes for the corresponding anti-wall scraper assemblies to be detachably installed. The mounting plates are detachably installed on the transition holes.

[0013] As a preferred embodiment, the outer edge of the first scraper sheet is adapted to the curvature of the inner wall surface of the mixing tank.

[0014] As a preferred embodiment, both ends of the arc of the first semi-circular splice have lugs extending radially outward, and each lug has a locking hole. The depth direction of the locking hole is perpendicular to the lug. The lugs of the radial stirring plate assembly are stacked correspondingly, and the locking holes are correspondingly aligned and pass through each other. The first fastener includes a first screw and a first nut. The first screw passes through the two stacked lugs from one side, and the first nut is locked onto the threaded rod of the first screw from the other side.

[0015] As a preferred embodiment, both the first and second stirring blades include a separate assembly base and a stirring blade body; the assembly base includes: a first semi-circular assembly portion, the lugs, and a mounting protrusion, the mounting protrusion being connected to the outer circumferential surface of the first semi-circular assembly portion and located at the middle position of the lugs at both ends; the inner end of the stirring blade body is welded or detachably locked to the mounting protrusion, and the oblique through hole is provided at the outer end of the stirring blade body.

[0016] As a preferred embodiment, the stirring plate body is an L-shaped folded plate, and the oblique through hole is disposed on one folded edge and / or the other folded edge of the L-shaped folded plate; or: The main body of the stirring plate is a triangular through-hole tube. The outer end of the stirring plate main body has two sides of the triangular through-hole tube cut off and one side is retained as an extension. The oblique through hole is provided on the extension.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly achieves the following by using a modular radial stirring blade assembly design, which enables the stirring blades to be quickly assembled and locked on the central axis: free adjustment of axial position, increase or decrease of the number of components as needed, and improved disassembly and maintenance efficiency. It standardizes most of the components of various stirring paddles, which is beneficial to cost control. Moreover, for factories that need to mix chemical emulsions, solvents, etc., different numbers of radial stirring blade assemblies can be installed along the central axis according to different stirring requirements. The spacing between the upper and lower sets of radial stirring blade assemblies can also be flexibly set. The number of radial stirring blade assemblies and the upper and lower spacing can be set according to different tank depths and different stirring and mixing intensity requirements.

[0018] Meanwhile, the angled through-hole at the outer end of the agitator blade allows for the omission of anti-wall-sticking scraper components for materials that are not prone to adhering to the walls. This angled through-hole serves as a mixing passage; as the agitator blade rotates with the central shaft, some fluid passes through it, reducing resistance. Furthermore, the high-speed flow of fluid through the through-hole creates localized high-speed jets, aiding in the generation of eddies and turbulence, breaking the laminar flow and promoting better mixing. For materials driven by the central shaft's rotation, the added angled through-hole guides the fluid in a flow direction distinct from the original axial / radial flow, helping to eliminate "dead zones" within the mixing tank and resulting in better mixing uniformity. In cases requiring the installation of anti-wall-sticking scraper components, the angled through-hole can serve as a mounting hole. Therefore, the modular design of the agitator blade, with localized modifications to add accessories, can meet the needs of various applications.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a perspective view of a modular adjustable stirring paddle according to Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of a modular adjustable stirring paddle according to Embodiment 1 of this utility model; Figure 3 This is a perspective view of the modular adjustable stirring paddle of Embodiment 2 of this utility model; Figure 4 This is a top view of the modular adjustable stirring paddle of Embodiment 2 of this utility model; Figure 5 This is a cross-sectional view of the modular adjustable stirring paddle of Embodiment 2 of this utility model; Figure 6 This is an exploded view of an anti-wall-scraping scraper assembly that can also be fitted with the modular adjustable stirring paddle of Embodiment 2 of this utility model; Figure 7 This is a structural diagram of a modular adjustable stirring paddle equipped with an anti-wall scraper assembly, according to Embodiment 2 of this utility model. Figure 8 This is another structural diagram of a modular adjustable stirring paddle equipped with an anti-wall scraper assembly, which is an embodiment of the present invention. Detailed Implementation

[0021] Please refer to Figures 1 to 8 As shown, it illustrates the specific structure of various embodiments of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] A modular adjustable agitator extends into a mixing tank 10 during use. Taking a fixed mixing tank 10 as an example, it is mounted on a mounting base plate 1 (for large mixing tanks 10, the mounting base plate 1 also refers to a floor slab). The modular adjustable agitator includes a central shaft 20 and at least two sets of radial agitator blade assemblies 30 mounted on the central shaft 20.

[0024] The central shaft 20 is a metal column, which is cylindrical and extends vertically; the upper end of the central shaft 20 is used to connect to the power end of the motor to receive rotational drive.

[0025] The radial stirring blade assembly 30 is installed with an adjustable vertical spacing along the central axis 20. Depending on different stirring requirements, different numbers of radial stirring blade assemblies 30 can be installed along the central axis 20. The spacing between the upper and lower sets of radial stirring blade assemblies 30 can also be flexibly set. The number of radial stirring blade assemblies 30 and the vertical spacing can be set according to different tank depths and different stirring and mixing intensity requirements.

[0026] The radial stirring blade assembly 30 includes a first stirring blade and a second stirring blade, each with a first semi-circular joining portion 31 at its inner end and an oblique through hole at its outer end. The depth direction of the oblique through hole is set at an angle to the central axis 20, so that the oblique through hole is not parallel to the central axis 20, preferably 30° to 90°. For cases where an anti-wall scraper assembly needs to be installed, the oblique through hole can be used as a mounting hole. However, for materials that are not easy to stick to the wall, the anti-wall scraper assembly can be omitted. The oblique through hole is reserved as a mixing through hole. When the stirring blade rotates with the central axis 20, some fluid will pass through the oblique through hole, which can reduce the resistance on the stirring blade. At the same time, when the fluid passes through the oblique through hole at high speed, it can form a local high-speed jet, which helps to generate eddies and turbulence, which is beneficial to breaking the laminar flow state and promoting better mixing of the fluids. Of course, for the rotational power driven by the central shaft 20, the addition of the oblique through-hole guides the fluid to flow in a direction different from the original axial / radial flow, which helps to eliminate the "dead zone" within the mixing tank 10 and improves the mixing uniformity. Therefore, the modular design of the mixing paddle and the addition of localized accessories can meet the usage requirements of different situations.

[0027] The two first semi-circular splicing portions 31 of the radial stirring blade assembly 30 are joined together to form a first locking ring that matches the outer diameter of the central shaft 20, and the first locking ring is clamped and fixed to the central shaft 20 by a first fastener. Both ends of the first semi-circular splicing portion 31 have radially outwardly extending lugs 33, each lug 33 having a locking hole 331. The depth direction of the locking hole 331 is perpendicular to the lug 33. The lugs of the radial stirring blade assembly 30 are correspondingly stacked, and the locking holes 331 are correspondingly aligned and pass through each other. The first fastener includes a first screw and a first nut. The first screw passes through the two stacked lugs 33 from one side, and the first nut is locked onto the threaded shaft of the first screw from the other side. The cap of the first screw and the first nut clamp and fix the two stacked lugs 33, thereby achieving the clamping and fixing of the first locking ring to the central shaft 20. Because it is assembled from two first semi-circular splicing parts 31, it can better meet the assembly tolerance requirements, the assembly quality is controllable, and the assembly yield is high. In order to further improve the locking firmness, auxiliary holes 311 can be opened on other parts of the first semi-circular splicing part 31, such as the outer ring side between the lug 33 and the mounting protrusion 312. These are internally threaded holes, and auxiliary screws are screwed into the auxiliary holes 311, with the inner end of the auxiliary screws tightly abutting against the outer circumferential surface of the central shaft 20.

[0028] A bottom scraper assembly can be detachably installed below the lowest radial stirring blade assembly 30 on the central shaft 20. The bottom scraper assembly includes a first scraper and a second scraper, each with a second semi-circular joining portion at its inner end, and an arc-shaped scraper frame 32' and several first scraping sheets mounted on the arc-shaped scraper frame 32' at its outer end. The second semi-circular joining portions are assembled to form a second locking ring matching the outer diameter of the central shaft 20, and the second locking ring is secured to the central shaft 20 by second fasteners. Using bottom scraping can forcibly lift and lower settled materials, reducing bottom residue. Typically, the plane containing the first scraping sheet is inclined at an angle of 10° to 45° to the corresponding radial direction. The first scraping sheet is made of plastic, such as polyurethane, nylon, or wear-resistant engineering plastics. The outer edge of the first scraping sheet adapts to the curvature of the inner wall of the mixing tank 10. The edge of the first scraping sheet is typically tapered.

[0029] Furthermore, especially for materials that easily stick to the wall, an anti-sticking scraper assembly 40 is detachably installed at the oblique through hole 322. For example... Figure 6As shown, the anti-wall-sticking scraper assembly 40 includes a mounting plate 41, a hinge plate 42, a second scraping film 43, and a torsion spring 44. The mounting plate 41 is detachably mounted on the oblique through hole 322. The hinge plate 42 is hinged relative to the mounting plate 41. The torsion spring 44 is positioned between the mounting plate 41 and the hinge plate 42 to provide the hinge plate 42 with rotational return force. The second scraping film 43 is mounted on the hinge plate 42. When the second scraping film 43 scrapes material along the inner circumferential wall of the mixing tank 10, it forms an elastic contact force with the inner circumferential wall, ensuring an ideal scraping effect and effectively solving the problem of material sticking to the wall. When the central shaft 20 rotates, the anti-wall-sticking scraper assembly 40 scrapes the material off the inner wall of the mixing tank 10, preventing the material from sticking to the inner wall of the tank for a long time without being fully mixed. The second scraper sheet 43 is made of plastic, such as polyurethane, nylon, or wear-resistant engineering plastics. Preferably, the second scraper sheet 43 has a certain radial elastic deformation to better adapt to the diameter error of the mixing tank 10 and ensure the scraping effect.

[0030] In actual design and manufacturing, the anti-wall-scraping scraper assemblies 40 of multiple sets of radial stirring blade assemblies 30 can be connected in series via axial connecting plates 50. The axial connecting plates 50 are connected to the oblique through holes of each radial stirring blade assembly 30, and provide several transition holes for the detachable installation of the corresponding anti-wall-scraping scraper assembly 40. The mounting plate 41 is detachably installed on the transition holes. This structure improves the integrity of the stirring blades of the impeller, thus enhancing the overall structural strength.

[0031] Considering ease of manufacture and process versatility, both the first and second stirring blades are designed to include two parts: a separate assembly base and a stirring blade body 32. The assembly base includes a first semi-circular assembly part 31, a lug 33, and a mounting protrusion 312. The mounting protrusion 312 is connected to the outer ring surface of the first semi-circular assembly part 31 and is located in the middle of the lugs 33 at both ends. The inner end of the stirring blade body 32 is welded or detachably locked to the mounting protrusion 312, and the oblique through hole is provided at the outer end of the stirring blade body 32. Therefore, for all agitators, the same length of central shaft 20 can satisfy the agitator 10 within a certain depth range. Even for agitators 10 with large depth differences, the central shaft 20 of the appropriate length can be cut as needed. The assembly base can be universal (because the outer diameter of the central shaft 20 remains unchanged). The agitator body 32 can be flexibly designed. For example, in Embodiment 1, the agitator body 32 is an L-shaped fold, and the oblique through holes 321 and 322 are set on one fold and / or the other fold of the L-shaped fold. In Embodiment 2, the agitator... The main body 32 is a triangular through-hole tube. The two sides of the triangular through-hole tube are cut off from the outer end of the main body 32, leaving one side as an extension 323. The oblique through-hole 322 is provided on the extension 323. The radial length of the main body 32 can meet the requirements of different mixing tank diameters 10. Of course, whether or not an anti-wall scraper assembly is installed on the outer end of the main body 32, and the size of the second scraper film 43 on the anti-wall scraper assembly, can make the mixing blade meet different applicable conditions.

[0032] The key design feature of this invention lies in its modular radial stirring blade assembly 30, which enables the stirring blades to be quickly assembled and locked on the central shaft 20. This achieves: free adjustment of axial position, on-demand increase or decrease in the number of components, and improved disassembly and maintenance efficiency. It standardizes most of the components of various stirring paddles, which helps control costs. For factories that require mixing chemical emulsions, solvents, etc., different numbers of radial stirring blade assemblies 30 can be installed along the central shaft 20 according to different stirring requirements. The spacing between the upper and lower sets of radial stirring blade assemblies 30 can also be flexibly set. The number of radial stirring blade assemblies 30 and the vertical spacing can be set according to different tank depths and different stirring and mixing intensity requirements. Meanwhile, the angled through-hole at the outer end of the agitator blade allows for the omission of anti-wall-sticking scraper components for materials that are not prone to adhering to the walls. This angled through-hole is reserved as a mixing passage. When the agitator blade rotates with the central shaft 20, some fluid will pass through the angled through-hole, reducing the resistance experienced by the agitator blade. Simultaneously, the high-speed flow of fluid through the angled through-hole can form a localized high-speed jet, helping to generate eddies and turbulence, which is beneficial for breaking the laminar flow state and promoting better mixing of the fluids. Of course, for applications powered by the rotation of the central shaft 20, the addition of the angled through-hole guides the fluid to flow in a direction different from the original axial / radial flow, helping to eliminate "dead zones" within the mixing tank and resulting in better mixing uniformity. For situations requiring the installation of anti-wall-sticking scraper components, the angled through-hole can be used as a mounting hole. Therefore, the modular design of the agitator blade, with localized modifications to the accessories, can meet the usage requirements of different situations.

[0033] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A modular adjustable stirring paddle, characterized in that, include: A central axis; the central axis is cylindrical and extends vertically. At least two sets of radial stirring blade assemblies are provided; the radial stirring blade assemblies are installed with adjustable spacing along the central axis; each radial stirring blade assembly includes a first stirring blade and a second stirring blade, the inner ends of which are respectively provided with a first semi-circular splicing portion, and the outer ends of which are respectively provided with oblique through holes; the depth direction of the oblique through holes is set at an angle to the central axis; the two first semi-circular splicing portions of the radial stirring blade assembly are spliced ​​together to form a first locking ring that matches the outer diameter of the central axis, and the first locking ring is fastened and fixed to the central axis by a first fastener.

2. The modular adjustable stirring paddle according to claim 1, characterized in that: A bottom material scraper assembly can be detachably installed below the lowest radial stirring blade assembly on the central shaft; the bottom material scraper assembly includes a first scraper and a second scraper, the inner ends of which are respectively provided with a second semi-circular splicing part, and the outer ends of which are respectively provided with an arc-shaped scraper frame and a plurality of first scraping rubber sheets installed on the arc-shaped scraper frame; the second semi-circular splicing parts are spliced ​​to form a second locking ring that matches the outer diameter of the central shaft, and the second locking ring is clamped and fixed to the central shaft by a second fastener.

3. The modular adjustable stirring paddle according to claim 2, characterized in that: The plane containing the first scraping film is inclined at an angle of 10° to 45° to the corresponding radial direction.

4. The modular adjustable stirring paddle according to claim 1, characterized in that: An anti-scraping scraper assembly is detachably installed at the oblique through hole.

5. A modular adjustable stirring paddle according to claim 4, characterized in that: The anti-scraping scraper assembly includes a mounting plate, a hinge plate, a torsion spring, and a second scraping film. The mounting plate is detachably mounted on the oblique through hole. The hinge plate is hinged relative to the mounting plate. The torsion spring is disposed between the mounting plate and the hinge plate to provide the hinge plate with rotational reset elasticity. The second scraping film is mounted on the hinge plate.

6. A modular adjustable stirring paddle according to claim 5, characterized in that: The anti-wall scraper assemblies of multiple radial stirring blade assemblies are connected in series by axial connecting plates. The axial connecting plates are connected to the oblique through holes of each radial stirring blade assembly, and the axial connecting plates provide several transition holes for the corresponding anti-wall scraper assemblies to be detachably installed. The mounting plates are detachably installed on the transition holes.

7. A modular adjustable stirring paddle according to claim 2 or 3, characterized in that: The outer edge of the first scraper sheet is adapted to the curvature of the inner wall of the mixing tank.

8. A modular adjustable stirring paddle according to claim 1, characterized in that: Both ends of the first semi-circular splice have lugs extending radially outward. Each lug has a locking hole, the depth of which is perpendicular to the lug. The lugs of the radial stirring plate assembly are stacked accordingly, and the locking holes are correspondingly aligned and pass through each other. The first fastener includes a first screw and a first nut. The first screw passes through the two stacked lugs from one side, and the first nut is locked onto the threaded rod of the first screw from the other side.

9. A modular adjustable stirring paddle according to claim 8, characterized in that: Both the first and second stirring blades include a separate assembly base and a stirring blade body; the assembly base includes: a first semi-circular assembly part, the lugs, and a mounting protrusion, the mounting protrusion being connected to the outer ring surface of the first semi-circular assembly part and located at the middle position of the lugs at both ends; the inner end of the stirring blade body is welded or detachably locked to the mounting protrusion, and the oblique through hole is provided at the outer end of the stirring blade body.

10. A modular adjustable stirring paddle according to claim 9, characterized in that: The stirring plate body is an L-shaped folded plate, and the oblique through hole is provided on one folded edge and / or the other folded edge of the L-shaped folded plate; or: The main body of the stirring plate is a triangular through-hole tube. The outer end of the stirring plate main body has two sides of the triangular through-hole tube cut off and one side is retained as an extension. The oblique through hole is provided on the extension.

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