Stirrer and reaction kettle
By designing outer and inner spiral ribbon segments with opposite rotation directions on the agitator and combining them with a wedge structure, axial flow and mixing of materials in the agitator are achieved, solving the problem of poor mixing effect of existing agitators and improving mixing uniformity and mixing efficiency.
Patent Information
- Application Number
- CN202422668550.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-01
AI Technical Summary
The existing agitator design results in poor mixing effect between materials at different levels, making it difficult to achieve uniform mixing of materials, especially in axial flow.
An agitator is designed, including multiple stirring units on a stirring shaft. The outer and inner spiral ribbon segments rotate in opposite directions, generating upward and downward thrusts. Combined with a wedge design, the agitator promotes radial and axial flow of materials, and scrapes the materials at the bottom of the container through a scraper.
It improves the mixing uniformity of materials, enhances the stirring efficiency, reduces the resistance during the stirring process, avoids material accumulation, and improves material utilization and equipment durability.
Smart Images
Figure CN223381607U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stirring equipment, in particular to a stirrer and a reaction kettle. Background Art
[0002] In industrial production, agitators are mainly used to mix materials evenly. Agitators usually include a stirring shaft and multiple blades. The multiple blades are usually fixedly mounted on the stirring shaft and arranged in a ring around the central axis of the stirring shaft. By rotating the stirring shaft, the blades generate a large shear force to disperse the materials and achieve the purpose of uniform mixing.
[0003] This type of agitator has a relatively simple design. The blades can usually only rotate at a fixed level, and the material can only flow at a fixed level. Although it can cause the material to flow radially and promote the mixing of the material, it cannot effectively produce axial flow. This means that the mixing effect between the materials at each level in the equipment is poor, and it is difficult to achieve overall uniform mixing of the materials. Utility Model Content
[0004] In order to solve the technical problem that the existing device has poor mixing effect between materials at different levels and it is difficult to achieve uniform mixing of the overall materials, the utility model provides a stirrer and a reactor that can make the materials produce axial flow and improve the overall mixing effect of the materials.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] The agitator includes a stirring shaft and multiple stirring units fixed on the stirring shaft. The multiple stirring units are spaced apart in the length direction of the stirring shaft. A single stirring unit includes a cross arm, an outer spiral ribbon segment and an inner spiral ribbon segment. The first end of the cross arm is fixed on the stirring shaft, the second end of the cross arm is connected to the outer spiral ribbon segment, and the inner spiral ribbon segment is fixed between the first end and the second end of the cross arm. The outer spiral ribbon segment and the inner spiral ribbon segment rotate in opposite directions.
[0007] Furthermore, the outer spiral ribbon segment rotates in a right direction, and generates an upward thrust under the action of the rotation of the stirring shaft. The inner spiral ribbon segment rotates in a left direction, and generates a downward thrust under the action of the rotation of the stirring shaft.
[0008] Furthermore, the cross arm is a wedge, and the sharp tip of the wedge points to the direction of its own rotation.
[0009] The utility model also provides a reactor, which is provided with a stirring device. The stirring device is the stirrer described in the above embodiment. A scraper is provided at the bottom end of the stirring shaft. The scraper includes a strip plate and a connecting arm. One end of the connecting arm is connected to the stirring shaft, and the other end is connected to one end of the strip plate. The other end of the strip plate is connected to the bottom end of the stirring shaft. The reactor has a conical inner bottom. The strip plate has a flat surface that fits with the conical inner bottom of the reactor and is used to scrape material off the bottom wall inside the reactor.
[0010] Furthermore, the connecting arm is a wedge, and the sharp tip of the wedge points to the direction of its own rotation.
[0011] The beneficial effects of the utility model are:
[0012] 1. The multiple stirring units of this agitator are spaced apart in the length direction of the stirring shaft. The outer spiral ribbon segment rotates in opposite directions to the inner spiral ribbon segment, so that the material can flow not only in the radial direction but also in the axial direction. In addition, the outer spiral ribbon segment and the inner spiral ribbon segment drive the materials at different levels to blend, thereby improving the mixing effect of the materials in the entire container.
[0013] 2. The right-handed outer spiral section generates an upward thrust, while the left-handed inner spiral section generates a downward thrust. This design promotes the circulation of materials in the axial direction and enhances the overall mixing effect. The materials form an up and down circulation in the container, which helps to eliminate mixing dead corners and improve mixing uniformity.
[0014] 3. The wedge design reduces the resistance generated during the mixing process and improves the mixing efficiency. The sharp top points in the direction of rotation, which helps to better cut and disperse the materials and enhance the mixing effect.
[0015] 4. The design of the strip plate and the connecting arm enables the scraper to effectively scrape the material on the conical inner bottom, avoiding the accumulation of material at the bottom of the container, improving the utilization rate of the material and reducing the cleaning workload.
[0016] 5. The wedge-shaped connecting arm further reduces the resistance during the mixing process, improves the mixing efficiency, increases the durability of the connecting arm and reduces wear. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the agitator of the present utility model;
[0018] Figure 2 This is a structural diagram of the agitator of the present invention from another angle;
[0019] Figure 3 This is a schematic diagram of the connection between the strip plate, the connecting arm and the stirring shaft of the utility model;
[0020] Figure 4 This is a schematic diagram of the connection between the cross arm, the inner spiral ribbon segment and the stirring shaft of the utility model;
[0021] Marked in the figure are: 1- stirring shaft, 2- cross arm, 3- outer spiral ribbon segment, 4- strip plate, 5- inner spiral ribbon segment, 6- connecting arm. DETAILED DESCRIPTION
[0022] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clearly expressed, the present invention is further described below with reference to the accompanying drawings.
[0023] First of all, it needs to be stated that the technical solutions of the embodiments of the present application are clearly and completely described. The described embodiments are part of the embodiments of the present application and are not limitations of the present utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.
[0024] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial" or "radial" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.
[0025] It should be noted that, in this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0026] Reference Figures 1 to 4 The utility model provides a stirrer and a reaction kettle.
[0027] Reference Figure 1 and Figure 2 The agitator includes a stirring shaft 1 and a plurality of stirring units fixed on the stirring shaft 1. The plurality of stirring units are spaced apart in the length direction of the stirring shaft 1. A single stirring unit includes a cross arm 2, an outer spiral ribbon segment 3 and an inner spiral ribbon segment 5. The first end of the cross arm 2 is fixed on the stirring shaft 1, the second end of the cross arm 2 is connected to the outer spiral ribbon segment 3, the inner spiral ribbon segment 5 is fixed between the first end and the second end of the cross arm 2, and the outer spiral ribbon segment 3 and the inner spiral ribbon segment 5 have opposite rotation directions.
[0028] For the spiral ribbon segment, those skilled in the art should know that it is a segment of the spiral ribbon. The spiral ribbon is a spiral belt structure, usually made of metal plates (such as stainless steel, carbon steel, etc.). It is fixed around the outer circumference of the vertical axis to form a spiral shape. The width, thickness and pitch of the spiral ribbon can be reasonably selected according to the actual situation on site. The expression here should be clearly understood by those skilled in the art.
[0029] For multiple stirring units, they are spaced apart in the length direction of the stirring shaft 1. A single group of stirring units includes multiple stirring units that are arranged in parallel and spaced apart. The arrangement direction of the single group of stirring units is parallel to the axis of the stirring shaft 1. Two to three groups of stirring units can be arranged in a ring around the outer periphery of the stirring shaft 1. It can also be set that multiple stirring units are spirally arranged along the length direction of the stirring shaft 1, and multiple stirring units are combined to form a complete spiral ribbon or a partial spiral ribbon.
[0030] The inner spiral segment 5 is fixed between the first end and the second end of the cross arm 2. Preferably, the inner spiral segment 5 is close to the first end of the cross arm 2, which can reduce the movement interference between the inner spiral segment 5 and the outer spiral segment 3. The inner spiral segment 5 is preferably welded to the cross arm 2, or it can be integrally formed, fixed with screws or other fixing methods.
[0031] The first end of the cross arm 2 is preferably welded to the stirring shaft 1, so as to ensure greater structural strength.
[0032] The outer spiral ribbon segment 3 and the inner spiral ribbon segment 5 have opposite rotation directions, that is, the outer spiral ribbon segment 3 is left-handed and the corresponding inner spiral ribbon segment 5 is right-handed, or the outer spiral ribbon segment 3 is right-handed and the corresponding inner spiral ribbon segment 5 is left-handed. This agitator allows the material to flow not only in the radial direction but also in the axial direction. The outer spiral ribbon segment 3 and the inner spiral ribbon segment 5 drive the materials at different levels to blend, thereby improving the mixing effect of the materials in the entire container.
[0033] Reference Figures 1 to 4 In some embodiments, the outer spiral segment 3 has a right-hand rotation direction, and generates an upward thrust under the rotation of the stirring shaft 1. The inner spiral segment 5 has a left-hand rotation direction, and generates a downward thrust under the rotation of the stirring shaft 1.
[0034] Outer spiral ribbon segment 3: When the stirring shaft 1 rotates, the right-hand design of the outer spiral ribbon segment 3 pushes the material upward. The material experiences shearing and tumbling during the rising process, which helps to disperse and mix.
[0035] Inner spiral section 5: The left-hand design of the inner spiral ribbon pushes the material downward. The material will also experience shearing and tumbling during the downward process, which helps to further mix it.
[0036] Because the outer ribbon segment 3 pushes the material upward and the inner ribbon segment 5 pulls it downward, the material converges in the center of the agitator. This central convergence effect forces the material to transfer from both sides to the center, increasing the interaction between the materials. The material reaches the top of the container under the action of the outer ribbon segment 3 and then reaches the bottom of the container under the action of the inner ribbon segment 5. This circular flow helps to evenly distribute the material throughout the container.
[0037] The material forms a vortex-like flow pattern in the process of rising and falling. This vortex flow can accelerate the mixing of materials because the materials continuously roll and collide in the vortex, increasing the contact area and frequency between the materials.
[0038] In some embodiments, cross arm 2 is a wedge-shaped structure with its sharp tip pointing in the direction of rotation. This wedge-shaped design reduces resistance to cross arm 2 during stirring, improving stirring efficiency. The sharp tip pointing in the direction of rotation helps to better cut and disperse the material, enhancing the stirring effect.
[0039] The utility model also provides a reactor, which is provided with a stirring device. The stirring device is the stirrer of the above embodiment. A scraper is provided at the bottom end of the stirring shaft 1. The scraper includes a strip plate 4 and a connecting arm 6. One end of the connecting arm 6 is connected to the stirring shaft 1, and the other end is connected to one end of the strip plate 4. The other end of the strip plate 4 is connected to the bottom end of the stirring shaft 1. The reactor has a conical inner bottom. The strip plate 4 has a flat surface that fits with the conical inner bottom of the reactor and is used to scrape material from the bottom wall inside the reactor.
[0040] The specific structure of the agitator refers to the above embodiment. Since this reactor adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.
[0041] The scraper is preferably a strip scraper, that is, a scraper formed by a combination of a strip plate 4 and a connecting arm 6. The strip plate 4 has a flat surface that fits the conical inner bottom of the reactor, and its sweeping path fits the conical inner bottom of the reactor; a serrated scraper can also be used, and the edge of the serrated scraper has multiple small serrations. The serration design can better cut and scrape off materials adhering to the container wall; a spring scraper can also be used, which usually consists of a metal plate and a spring. One end of the metal plate is fixed to the stirring shaft 1, and the other end is in contact with the container wall through the spring. The spring design enables the scraper to automatically adjust its position as the container wall changes, ensuring that it always sticks to the container wall.
[0042] Reference Figure 3 In some embodiments, the connecting arm 6 is a wedge, with the sharp tip of the wedge pointing in the direction of its own rotation. The wedge-shaped connecting arm 6 further reduces the resistance during the stirring process, improves the stirring efficiency, increases the durability of the connecting arm 6, and reduces wear.
Claims
1. A stirrer comprising a stirring shaft (1) and a plurality of stirring units fixed on the stirring shaft (1), characterized in that: The plurality of stirring units are spaced apart and distributed along the length direction of the stirring shaft (1); a single stirring unit comprises a cross arm (2), an outer spiral ribbon segment (3) and an inner spiral ribbon segment (5); a first end of the cross arm (2) is fixed on the stirring shaft (1); a second end of the cross arm (2) is connected to the outer spiral ribbon segment (3); the inner spiral ribbon segment (5) is fixed between the first end and the second end of the cross arm (2); and the outer spiral ribbon segment (3) and the inner spiral ribbon segment (5) have opposite rotation directions.
2. The agitator according to claim 1, wherein: The outer spiral ribbon segment (3) rotates in a right-hand direction and generates an upward thrust when the stirring shaft (1) rotates. The inner spiral ribbon segment (5) rotates in a left-hand direction and generates a downward thrust when the stirring shaft (1) rotates.
3. The agitator according to claim 1, wherein: The cross arm (2) is a wedge, and the sharp tip of the wedge points to the direction of its own rotation.
4. Reactor: A stirring device is provided in the reactor, which is characterized by: The stirring device is an agitator as described in any one of claims 1 to 3, wherein a scraper is provided at the bottom end of the stirring shaft (1), the scraper comprises a strip plate (4) and a connecting arm (6), one end of the connecting arm (6) is connected to the stirring shaft (1), and the other end is connected to one end of the strip plate (4), and the other end of the strip plate (4) is connected to the bottom end of the stirring shaft (1), the reactor has a conical inner bottom, and the strip plate (4) has a flat surface that fits the conical inner bottom of the reactor.
5. The reactor according to claim 4, characterized in that: The connecting arm (6) is a wedge, and the sharp tip of the wedge points to the direction of its own rotation.