A coaxial stirrer of the type comprising a stirrer shaft and a stirrer blade of the type comprising a pair of substantially parallel arms and a pair of substantially parallel and substantially parallel arms and a pair of substantially parallel

Abstract

The utility model relates to a coaxial mixer of a trident-shaped blade stirring paddle, including scrape wall drive part, stirring drive part, transmission shaft, coaxial transmission subassembly, jar, scrape wall subassembly and stirring paddle, stirring pulp is installed on transmission shaft, and stirring pulp is composed of upper trident-shaped blade and lower V-shaped blade, scrape wall subassembly is installed on the hollow shaft of coaxial transmission subassembly, and scrape wall subassembly includes two scrape wall main body boards, and is installed with a plurality of scraper and inclined plate on scrape wall main body board. The utility model stirring pulp and scrape wall subassembly have special design, and stirring pulp is composed of two different blades, and scrape wall subassembly is designed with the inclined plate that overlaps and rubs material with the trident-shaped blade of stirring paddle, when stirring, the material in jar forms the internal circulation of center subsidence and peripheral upfloating, can promote powder to dissolve into solvent, and promotes the stirring efficiency. In addition, the form that transmission part uses mechanical seal adds anti-dripping shield, can effectively prevent dust from invading bearing, and can prevent oil leakage from polluting material.

Description

Technical Field

[0001] This utility model relates to a mixer, and more particularly to a coaxial mixer with a halberd-shaped blade impeller. Background Technology

[0002] Vacuum coaxial mixers used in industries such as chemicals, new energy electronic pastes, and adhesives have two main drawbacks: First, the mixing process is challenging. Powdered materials in the raw materials have low density and are difficult to dissolve in solvents, floating on the surface and creating a powder-liquid separation. This makes it difficult to mix and obtain a homogeneous, qualified product, resulting in low production efficiency. Second, oil leakage occurs. During mixing, especially during vacuuming, internal oil leaks along the shaft into the tank, contaminating the product and affecting its quality. Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a coaxial mixer with a halberd-shaped blade impeller. The impeller and the wall scraping assembly of the mixer are specially designed. The impeller includes an upper blade and a lower blade. The upper blade is a halberd-shaped blade and the lower blade is a V-shaped blade. The wall scraping assembly is designed with an inclined plate that overlaps with the impeller to knead the material, which can promote the dissolution of powder into the solvent and improve the mixing efficiency.

[0004] The further technical problem to be solved by this utility model is that by using a grease-lubricated mechanical seal with a drip-proof cover on the drive shaft or hollow shaft, it can not only protect the core transmission components such as internal bearings from being damaged by impurities, but also prevent possible grease micro-leakage from directly contaminating the materials.

[0005] The technical solution to the above-mentioned technical problem is: a coaxial mixer with a halberd-shaped blade impeller, comprising a wall scraping drive component, a stirring drive component, a drive shaft, a coaxial transmission assembly, a tank body, a tank cover, and a wall scraping assembly and an impeller located inside the tank body. The drive shaft is connected to the stirring drive component. The coaxial transmission assembly includes a hollow shaft fitted outside the drive shaft, and the hollow shaft is connected to the wall scraping drive component through the transmission assembly. The impeller is mounted on the drive shaft and consists of upper blades and lower blades. The upper blades include at least one set of halberd-shaped blades. It consists of two halberd-shaped blades, each blade comprising a connecting plate, two arc-shaped plates symmetrically connected to both sides of the connecting plate, and two rectangular plates respectively connected to the ends of the two arc-shaped plates. The end of the connecting plate near the wall scraping assembly is a stirring tooth. The connecting plate is connected to the drive shaft. The lower blades include at least one set of V-shaped blades, each set of V-shaped blades being composed of two rectangular blades. The wall scraping assembly is mounted on a hollow shaft and includes two wall scraping main plates. Multiple scrapers that are in close contact with the inner wall of the tank are mounted on the wall scraping main plates, and multiple inclined plates are provided on the inner side of the wall scraping main plates.

[0006] Furthermore, the two halberd-shaped blades in the same group are set at opposite angles, and from the side view, the two halberd-shaped blades in the same group form an X shape.

[0007] Furthermore, the included angle α between the halberd-shaped blade and the drive shaft is 30-60°.

[0008] Furthermore, the tank body is a cylindrical body with a conical bottom. The scraper body plate consists of an upper connecting section, a middle vertical section, and a lower inclined section connected sequentially from top to bottom. Multiple scrapers are installed on the middle vertical section and the lower inclined section. 2N inclined plates are installed on the middle vertical section. N sets of halberd-shaped blades are provided. The stirring teeth of the halberd-shaped blades are located between two inclined plates. N is 1-5. The lower blades are located inside the conical bottom of the tank body and inside the lower inclined section of the scraper assembly.

[0009] Furthermore, the included angle β between the inclined plate and the vertical section of the scraping main plate is 30-60°.

[0010] Furthermore, the hollow shaft is mounted on the tank cover via an upper bearing, a lower bearing, and a bearing housing. The lower end of the bearing housing is connected to the tank cover. A mechanical seal is installed on the drive shaft above the upper bearing, and a mechanical seal is installed on the hollow shaft above the lower bearing. A skeleton oil seal and a drip-proof cover are sequentially installed on the hollow shaft below the bearing housing. The upper end of the drip-proof cover is connected and sealed to the tank cover and is located inside the tank.

[0011] Furthermore, the lower and upper ends of the hollow shaft are connected to the transmission shaft via bearing one and bearing two, respectively. A skeleton oil seal two and a drip-proof cover two are installed on the transmission shaft below bearing one. The drip-proof cover two is connected and sealed to the bottom end of the hollow shaft.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects: 1. This utility model's stirring paddle adopts a combination of upper halberd-shaped blades and lower V-shaped blades. The use of halberd-shaped blades increases the working area, ensuring sufficient coverage. The outer wall scraping assembly of the stirring paddle is equipped with inclined plates. During operation, the wall scraping assembly and the stirring paddle rotate in opposite directions. Both types of blades on the stirring paddle exert a downward pressure, causing the upper layer of powder material to be pressed down and immersed into the liquid, increasing the contact between the powder and the liquid. The cooperation between the stirring paddle and the wall scraping assembly causes the material in the tank to be pressed downward near the center and lifted upward near the tank wall, forming a circulating flow. When the stirring paddle and the wall scraping assembly pass each other, the stirring teeth of the halberd-shaped blades and the inclined plates of the wall scraping assembly overlap and rub against each other, making the material circulation in the tank smoother and more efficient, further promoting the dissolution of powder into the solvent and improving stirring efficiency.

[0013] 2. The transmission components utilize a mechanical seal with a drip-proof cover, effectively preventing dust from entering the bearings and causing damage, preventing oil leaks and contaminating materials, extending equipment lifespan, reducing maintenance costs, and improving equipment performance. Coaxial transmission components, as the core of the equipment, present a high risk of leakage and are difficult to maintain. The hollow shaft and transmission shaft are coaxially independent, and both are designed with grease-lubricated mechanical seals. A separate drip-proof cover is designed at the bottom of the bearing, forming an internal storage cavity. A skeleton oil seal is installed at the upper end of the drip-proof cover. During operation, this skeleton oil seal rotates with the shaft, throwing any minor oil leaks from the upper part into the drip-proof cover cavity; simultaneously, it also blocks any small amount of material that may evaporate or be sucked in by negative pressure at the bottom, throwing it into the drip-proof cover cavity, protecting the bearing. The drip-proof cover isolates external materials and protects the internal transmission parts, making regular maintenance, inspection, and cleaning more convenient and extending the equipment's lifespan.

[0014] In summary, through the optimizations in the above two aspects, this utility model improves production efficiency, enhances product quality, and thus increases equipment utilization rate.

[0015] The technical features of a coaxial mixer with a halberd-shaped blade impeller according to the present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This utility model provides a schematic diagram of a coaxial mixer structure with a halberd-shaped blade impeller.

[0017] Figure 2 : Front view of the stirring paddle of this utility model.

[0018] Figure 3 Left view of the stirring paddle of this utility model.

[0019] Figure 4 Top view of the stirring paddle of this utility model.

[0020] Figure 5 : A three-dimensional view of the stirring paddle of this utility model.

[0021] Figure 6 : Schematic diagram of the halberd-shaped blade structure of this utility model.

[0022] Figure 7 : Schematic diagram of the wall scraping component of this utility model.

[0023] Figure 8 : Figure 7 AA sectional view.

[0024] Figure 9: Schematic diagram of the transmission shaft and coaxial transmission assembly of this utility model.

[0025] In the diagram: 1-stirring paddle, 11-halberd-shaped blade, 111-connecting plate, 112-arc plate, 113-rectangular plate, 114-stirring teeth, 12-V-shaped blade.

[0026] 2-Wall scraping assembly, 21-Wall scraping main plate, 211-Upper connecting section, 212-Middle vertical section, 213-Lower inclined section, 22-Scraper, 23-Inclined plate.

[0027] 3-Tank body, 4-Tank cover, 5-Wall scraping drive component, 6-Stirring drive component.

[0028] 7-Coaxial transmission assembly, 71-Hollow shaft, 72-Driven sprocket, 73-Driven sprocket, 74-Mechanical seal one, 75-Mechanical seal two, 76-Skeleton oil seal one, 77-Anti-drip cover one, 78-Anti-drip cover two, 79-Skeleton oil seal two, 710-Bearing one, 711-Lower bearing, 712-Bearing housing, 713-Upper bearing, 714-Bearing two.

[0029] 8-Drive shaft. Detailed Implementation

[0030] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0031] Example 1: A coaxial mixer with a halberd-shaped blade impeller, such as Figures 1-9As shown, the device includes a wall scraping drive component 5, a stirring drive component 6, a drive shaft 8, a coaxial transmission assembly 7, a tank body 3, a tank cover 4, and a wall scraping assembly 2 and a stirring paddle 1 located inside the tank body. The drive shaft 8 is connected to the stirring drive component 6. The coaxial transmission assembly 7 includes a hollow shaft 71 fitted outside the drive shaft. The hollow shaft 71 is connected to the wall scraping drive component 5 through a transmission component (sprocket and chain). Specifically, a passive sprocket 72 is installed on the hollow shaft 71, and a driving sprocket 73 is installed on the wall scraping drive component 5. The passive sprocket 72 and the driving sprocket 73 are connected by a chain. The stirring paddle 1 is mounted on the drive shaft 8. The stirring paddle 1 consists of upper and lower blades. The upper blades include two sets of halberd-shaped blades 11 arranged vertically, each set consisting of two halberd-shaped blades. Each halberd-shaped blade is composed of a connecting plate 111, two arc-shaped plates 112 symmetrically connected to both sides of the connecting plate, and two rectangular plates 113 connected to the ends of the two arc-shaped plates. The end of the connecting plate near the scraper assembly has stirring teeth 114. The connecting plate 111 is connected to the drive shaft 8. The lower blades include a set of V-shaped blades 12, each set consisting of two rectangular blades. During operation, both types of blades exert downward pressure, ensuring that the upper layer of powder material is pressed and immersed in the liquid, increasing the contact between the powder and the liquid, and resulting in more thorough mixing. The three-layer blade design, with upper and lower connections, covers surfaces with different material volumes.

[0032] The scraper assembly 2 is mounted on a hollow shaft 71. The scraper assembly includes two scraper main plates 21. Multiple scraper blades 22, which can rotate close to the inner wall of the tank, are mounted on the outer scraper main plate 21. Multiple inclined plates 23 are provided on the inner side of the scraper main plate 21 to push the material upwards. During operation, the scraper blades 22 of the scraper assembly scrape off the material adhering to the tank wall, and the inclined plates 23 assist in pushing the material in the outer ring upwards, forming a circulation.

[0033] In this embodiment, the two hastate blades in the same group are arranged at opposite angles, as seen from the side view (e.g.) Figure 3 As shown), the two hastate blades in the same group are arranged in an X shape, with the two hastate blades located on both sides of the drive shaft. The included angle α between the hastate blade 11 and the drive shaft 8 is 30-60°, preferably 45°.

[0034] In this embodiment, the tank 3 is a cylindrical body with a conical bottom. The scraper plate 21 consists of an upper connecting section 211, a middle vertical section 212, and a lower inclined section 213 connected sequentially from top to bottom. Multiple scrapers 22 are installed on the middle vertical section 212 and the lower inclined section 213 to scrape off materials adhering to the tank. 2N inclined plates 23 are installed on the middle vertical section. N sets of halberd-shaped blades 11 are provided, where N is 2. The stirring teeth 114 of the halberd-shaped blades are located between two inclined plates 23. The angle β between the inclined plate 23 and the middle vertical section 212 of the scraper plate is 30-60°, preferably 45°. The upper blades are located inside the tank above the conical section, and the lower blades are installed at the bottom of the drive shaft and located inside the conical bottom of the tank, and inside the lower inclined section 213 of the scraper assembly, ensuring that all materials inside the tank are thoroughly stirred. The two-part blade design, connected vertically, covers surfaces with different material volumes. The inclined plate 23 of the wall scraper assembly and the stirring teeth 114 of the halberd-shaped blades of the agitator are intersected and rotate in opposite directions. During the stirring operation, the material in the tank forms an internal circulation with the center sinking and the periphery rising.

[0035] In this embodiment, the hollow shaft 71 is mounted on the can cover 4 via an upper bearing 713, a lower bearing 711, and a bearing seat 712. The lower end of the bearing seat 712 is connected to the can cover 4. A grease-lubricated mechanical seal 74 is mounted on the drive shaft above the upper bearing 713. A grease-lubricated mechanical seal 75 is mounted on the hollow shaft 71 above the lower bearing 711. A skeleton oil seal 76 and a drip-proof cover 77 are sequentially mounted on the hollow shaft 71 below the bearing seat 712. The upper end of the drip-proof cover 77 is connected and sealed to the can cover and located inside the can. The lower and upper ends of the hollow shaft 71 are connected to the drive shaft 8 via a bearing 710 and a bearing 714, respectively. A skeleton oil seal 79 and a drip-proof cover 78 are sequentially mounted on the drive shaft 8 below the bearing 710. The drip-proof cover 78 is connected and sealed to the bottom end of the hollow shaft 71. The function of mechanical seal 74 is to protect the upper bearing 713 and bearing 714 from contaminants entering them. The function of mechanical seal 75 is to protect the lower bearing 711 from contaminants entering it. The internal structures of anti-drip shields 77 and 78 form separate storage cavities. The upper end of the anti-drip shield is equipped with a skeleton oil seal. During operation, this skeleton oil seal rotates with the shaft, throwing any possible minor oil leaks from the upper part into the anti-drip shield cavity, and also throwing any small amount of material that may evaporate or be sucked in by negative pressure from the lower part into the anti-drip shield cavity. During operation, mechanical seal 74, skeleton oil seal 79, and drive shaft 8 rotate synchronously; mechanical seal 75, skeleton oil seal 76, and anti-drip shield 78 rotate synchronously with hollow shaft 71; anti-drip shield 77 is connected to the tank cover 4 and does not rotate.

[0036] In this embodiment, the wall scraping drive component 5 and the stirring drive component 6 are motors. The stirring paddle and the wall scraping assembly are driven by different power components, and the stirring directions can be opposite during operation.

[0037] As a variation of this embodiment, the number of upper blades of the stirring paddle can be adjusted according to the actual situation. The upper blades can be composed of one set of halberd-shaped blades or three sets of halberd-shaped blades arranged vertically. The lower blades can be composed of two sets of V-shaped blades or three sets of V-shaped blades arranged radially, that is, four or six rectangular blades are evenly distributed radially at the lower end of the drive shaft to form two or three sets of V-shaped blades. This ensures that the stirring can be carried out in place during operation and reduces the number of dead zones in the stirring.

[0038] Comparative test: Using the existing XFZH-H1000L 1000L planetary dispersion vacuum mixer to mix the wind power structural adhesive (400Kg powder and 820Kg liquid) requires 8 hours to achieve uniform mixing. Using the same material in Embodiment 1 of this utility model, only 4 hours are needed to obtain the product, and the mixing efficiency is significantly improved.

Claims

1. A coaxial mixer with a halberd-shaped blade impeller, comprising a wall scraping drive component (5), a stirring drive component (6), a drive shaft (8), a coaxial transmission assembly (7), a tank body (3), a tank cover (4), and a wall scraping assembly (2) and a stirring impeller (1) located within the tank body, wherein the drive shaft (8) is connected to the stirring drive component (6), and the coaxial transmission assembly (7) includes a hollow shaft (71) fitted outside the drive shaft, the hollow shaft being connected to the wall scraping drive component (5) via the transmission component, characterized in that: The stirring paddle (1) is mounted on the drive shaft. The stirring paddle consists of an upper blade and a lower blade. The upper blade includes at least one set of halberd blades (11). Each set of halberd blades consists of two halberd blades. Each halberd blade consists of a connecting plate (111), two arc plates (112) symmetrically connected to both sides of the connecting plate, and two rectangular plates (113) respectively connected to the ends of the two arc plates. The end of the connecting plate near the wall scraping assembly is a stirring tooth (114). The connecting plate is connected to the drive shaft. The lower blade includes at least one set of V-shaped blades (12). Each set of V-shaped blades consists of two rectangular blades. The wall scraping assembly (2) is mounted on a hollow shaft. The wall scraping assembly includes two wall scraping main plates (21). Multiple scrapers (22) that are in close contact with the inner wall of the tank are mounted on the wall scraping main plates. Multiple inclined plates (23) are provided on the inner side of the wall scraping main plates.

2. The coaxial mixer with a halberd-shaped blade impeller according to claim 1, characterized in that: The two halberd-shaped blades in the same group are set at opposite angles. From the side view, the two halberd-shaped blades in the same group form an X shape.

3. The coaxial mixer with a halberd-shaped blade impeller according to claim 2, characterized in that: The angle α between the halberd-shaped blade and the drive shaft is 30-60°.

4. A coaxial mixer with a halberd-shaped blade impeller according to any one of claims 1-3, characterized in that: The tank body is a cylindrical body with a conical bottom. The scraper body plate (21) consists of an upper connecting section (211), a middle vertical section (212), and a lower inclined section (213) connected from top to bottom. Multiple scrapers (22) are installed on the middle vertical section and the lower inclined section. 2N inclined plates (23) are installed on the middle vertical section. N sets of halberd blades (11) are provided. The stirring teeth (114) of the halberd blades are located between two inclined plates (23). N is 1-5. The lower blades are located inside the conical bottom of the tank body and inside the lower inclined section (213) of the scraper assembly.

5. A coaxial mixer with a halberd-shaped blade impeller according to claim 4, characterized in that: The included angle β between the inclined plate and the vertical section of the scraping main plate is 30-60°.

6. A coaxial mixer with a halberd-shaped blade impeller according to any one of claims 1-3, characterized in that: The hollow shaft is mounted on the tank cover (4) via an upper bearing (713), a lower bearing (711), and a bearing seat (712). The lower end of the bearing seat is connected to the tank cover. A mechanical seal (74) is installed on the drive shaft above the upper bearing. A mechanical seal (75) is installed on the hollow shaft above the lower bearing. A skeleton oil seal (76) and a drip-proof cover (77) are installed sequentially on the hollow shaft below the bearing seat. The upper end of the drip-proof cover is connected and sealed to the tank cover and located inside the tank.

7. A coaxial mixer with a halberd-shaped blade impeller according to claim 6, characterized in that: The lower and upper ends of the hollow shaft are connected to the transmission shaft by bearing one (710) and bearing two (714) respectively. The transmission shaft below bearing one is equipped with a skeleton oil seal two (79) and a drip-proof cover two (78). The drip-proof cover two is connected and sealed to the bottom end of the hollow shaft.

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