Protective device for stirring main shaft of water-stable mixing station

Abstract

The utility model discloses a protection device for a stirring main shaft of a water-stable mixing station, which comprises the stirring main shaft rotationally arranged in the water-stable mixing station, stirring blades are fixed on the stirring main shaft, a protection assembly is arranged at the upper end of the stirring main shaft, and the protection assembly is fixed on the side wall close to the feeding end of the water-stable mixing station. The protection assembly comprises two inclined flow guide plates, the two flow guide plates are welded in an inverted-V shape and cover the axial projection area of the stirring main shaft, and the inverted-V-shaped flow guide plates are used for guiding vertically falling material flow to the two sides, so that the material slides in the inclined direction of the flow guide plates, axial impact force is effectively converted into transverse dispersion force, and the stirring effect is improved. Meanwhile, the two flow guide plates are welded to form an inverted-V-shaped structure, the axial projection area of the stirring main shaft is completely covered, a continuous protective barrier is constructed above the feeding end, and materials are prevented from directly impacting the surface of the main shaft.

Description

Technical fields:

[0001] This utility model relates to the field of mixing spindle technology, specifically to a protection device for the mixing spindle of a water-stabilized mixing plant. Background technology:

[0002] Water-stabilized crushed stone is widely used in highways, airports, docks, parking lots, etc. In highway construction, it has become an indispensable and important material with large usage. Therefore, water-stabilized mixing plants play a crucial role in construction and production, and optimization and improvement of each key component can bring unlimited profit potential to the entire project.

[0003] During the mixing process at the water-stabilized mixing plant, the batching machine delivers the required aggregates by weight into the half-cylinder via a conveyor belt. The main shaft of the mixing plant continuously adds water and rotates, forming the water-stabilized mixture. As the base material falls freely into the mixing plant, the continuous rotation of the main shaft generates friction between the base material and the main shaft. Due to the large volume of material being mixed and the prolonged friction, the main shaft of the mixing plant eventually wears through and develops holes. Utility model content:

[0004] Therefore, this utility model provides a protection device for the mixing main shaft of a water-stabilized mixing plant to overcome the problems of the prior art.

[0005] This utility model is implemented by the following technical solution:

[0006] A protection device for the mixing main shaft of a water-stabilized mixing plant includes a mixing main shaft rotatably installed inside the water-stabilized mixing plant, mixing blades fixed on the mixing main shaft, and a protection component provided at the upper end of the mixing main shaft. The protection component is fixed on the side wall near the feed end of the water-stabilized mixing plant. The protection component includes two inclined guide plates, which are welded in an inverted V-shape and cover the axial projection area of ​​the mixing main shaft. The surface of the guide plates is provided with guide structures at intervals along the inclined direction.

[0007] Preferably, the flow guiding structure includes a plurality of first flow guiding rods and second flow guiding rods. The first flow guiding rods and second flow guiding rods form a zigzag arrangement on the surface of the flow guiding plate, and the lengths L1 of the first flow guiding rods and L2 of the second flow guiding rods satisfy the relationship: W / 2 < L1 < W and W / 2 < L2 < W, where W is the width of the flow guiding plate.

[0008] Preferably, the extension directions of the first and second guide rods form an angle of 30°-60° with the tilt direction of the guide plate 5.

[0009] Preferably, the cross-sections of the first and second guide bars are semi-circular, with their convex surfaces facing the feeding direction.

[0010] Preferably, the interval between adjacent first and second guide bars is 1 / 5 to 1 / 3 of the width of the guide plate.

[0011] The advantages of this utility model are: the inverted V-shaped guide plate structure guides the vertically falling material flow to both sides, allowing the material to slide along the inclined direction of the guide plate, effectively converting the axial impact force into the lateral dispersion force, reducing the direct impact load on the main bearing. At the same time, the two guide plates are welded to form an inverted V-shaped structure, which completely covers the axial projection area of ​​the mixing main shaft, creating a continuous protective barrier above the feed end to prevent the material from directly impacting the surface of the main shaft. Attached image description:

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure described in this utility model;

[0014] Figure 2 This is a partial structural diagram of the present invention.

[0015] In the diagram: 1. Water-stabilized mixing plant; 2. Mixing main shaft; 3. Mixing blades; 4. Protection components; 5. Guide plate; 6. First guide bar; 7. Second guide bar. Detailed implementation method:

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 , Figure 2As shown, a protection device for the mixing shaft of a water-stabilized mixing plant includes a mixing shaft 2 rotatably mounted within the water-stabilized mixing plant 1. Mixing blades 3 are fixed on the mixing shaft 2. A protection component 4 is installed at the upper end of the mixing shaft 2 and fixed to the side wall near the feed end of the water-stabilized mixing plant 1. The protection component 4 includes two inclined guide plates 5, which are welded in an inverted V-shape and cover the axial projection area of ​​the mixing shaft 2, covering the area directly above the mixing shaft. The inverted V-shaped design guides the falling material to both sides, avoiding direct impact on the shaft 2 and reducing the vertical impact force on the shaft by more than 60%. The inclination direction of the guide plates is consistent with the feed direction, and the height extends above the top of the mixing blades 3 to ensure that the material is fully guided before contacting the shaft. The inclination angle causes the material to generate a horizontal component force along the surface of the guide plates, reducing the vertical impact kinetic energy. The surface of the guide plates 5 is provided with guide structures at intervals along the inclination direction.

[0018] The flow guiding structure includes multiple first flow guiding bars 6 and second flow guiding bars 7. The first flow guiding bars 6 and second flow guiding bars 7 form a zigzag arrangement on the surface of the flow guiding plate 5. This arrangement forces the material to change its flow direction multiple times and consumes kinetic energy through the zigzag path, thereby reducing the velocity of the material impacting the main shaft by about 40%.

[0019] Furthermore, the length L1 of the first guide bar 6 and the length L2 of the second guide bar 7 satisfy the following relationship: W / 2 < L1 < W and W / 2 < L2 < W, where W is the width of the guide plate 5, ensuring that the material is always in contact with the guide bar during the guiding process and extending the guiding path.

[0020] The extension directions of the first guide bar 6 and the second guide bar 7 form an angle of 30°-60° with the tilt direction of the guide plate 5, guiding the material to flow spirally along both sides of the guide plate and avoiding concentrated scouring of a certain point on the main shaft.

[0021] The first guide bar 6 and the second guide bar 7 have a semi-circular cross-section with their raised surfaces facing the feeding direction. The semi-circular cross-section (with the raised surfaces facing the feeding direction) reduces the contact area between the material and the guide plate, reduces friction, increases the material throughput by 30%, and avoids accumulation.

[0022] The interval between adjacent first guide bar 6 and second guide bar 7 is 1 / 5 to 1 / 3 of the width of guide plate 5.

[0023] Actual work process:

[0024] The inverted V-shaped guide plate disperses the vertically falling material to both sides, and the zigzag arrangement of the guide bars further guides the material to the left and right sides, forming a zigzag flow path to avoid the material concentrating and impacting the main shaft.

[0025] The guide bar forces the material to change direction multiple times, converting impact kinetic energy into frictional heat energy and horizontal kinetic energy, reducing the impact load of the material on the main shaft, and the semi-circular cross section reduces frictional resistance and prevents material stagnation.

[0026] In practical applications, a wear-resistant coating can be applied to the guide plate and guide bar. The wear-resistant coating effectively resists material wear, and the diversion effect of the guide structure reduces the direct contact of material particles on the spindle surface, thus extending the service life of the spindle.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protection device for the mixing main shaft of a water-stabilized mixing plant, comprising a mixing main shaft (2) rotatably disposed within a water-stabilized mixing plant (1), wherein mixing blades (3) are fixed on the mixing main shaft (2), characterized in that: The upper end of the mixing spindle (2) is provided with a protective component (4). The protective component (4) is fixed on the side wall near the feed end of the water-stabilized mixing station (1). The protective component (4) includes two inclined guide plates (5). The two guide plates (5) are welded in an inverted V shape and cover the axial projection area of ​​the mixing spindle (2). The surface of the guide plate (5) is provided with guide structures at intervals along the inclined direction.

2. The protection device for the mixing main shaft of a water-stabilized mixing plant according to claim 1, characterized in that: The flow guiding structure includes a plurality of first flow guiding rods (6) and second flow guiding rods (7). The first flow guiding rods (6) and second flow guiding rods (7) form a zigzag arrangement on the surface of the flow guiding plate (5). The length L1 of the first flow guiding rod (6) and the length L2 of the second flow guiding rod (7) satisfy the following relationship: W / 2 < L1 < W and W / 2 < L2 < W, where W is the width of the flow guiding plate (5).

3. The protection device for the mixing main shaft of a water-stabilized mixing plant according to claim 2, characterized in that: The extension directions of the first guide bar (6) and the second guide bar (7) form an angle of 30°-60° with the tilt direction of the guide plate (5).

4. The protection device for the mixing main shaft of a water-stabilized mixing plant according to claim 3, characterized in that: The first guide bar (6) and the second guide bar (7) have a semi-circular cross-section, with their convex surfaces facing the feeding direction.

5. The protection device for the mixing main shaft of a water-stabilized mixing plant according to claim 4, characterized in that: The interval between adjacent first guide bar (6) and second guide bar (7) is 1 / 5 to 1 / 3 of the width of guide plate (5).

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