Grading grinding device for low-carbon cementitious material processing

Abstract

The utility model provides a kind of grading grinding device for low carbon cementitious material processing, including shell, the inside of shell is provided with mutually communicating feed inlet, material stagnation chamber, feeding chamber and feeding chamber, and the upper end of feeding chamber is equipped with screening plate, and the lower discharge passage is uniformly equipped with grinding mechanism, and its inner wall is equipped with falling slow-down plate;The lower portion of shell is equipped with supporting leg, and the upper portion of shell is equipped with feed cover and is communicated with feed inlet;Driving shaft is installed in the feeding chamber and material stagnation chamber of shell, and spiral blade is arranged on driving shaft, and one end of driving shaft is rotatably penetrated through shell, and is fixed with the output end of driving part installed outside shell;The utility model realizes material dynamic classification under the action of gravity and spiral blade by arc-shaped screening plate gradient aperture design;Spiral material conveying system of material stagnation chamber and feeding chamber ensures that material premix is uniform;Inclined falling slow-down plate in the lower discharge passage can control material falling speed, buffer impact, and also can block dust diffusion.

Description

Technical Field

[0001] This utility model belongs to the field of graded grinding technology, and in particular relates to a graded grinding device for processing low-carbon cementitious materials. Background Technology

[0002] Low-carbon cementitious materials, as key materials in the construction field, have a core advantage in significantly reducing carbon emissions during production through the resource utilization of industrial solid waste (such as fly ash, slag, and steel slag) and low-carbon production processes. However, the raw materials for these materials are mostly industrial waste residues with large differences in hardness and complex particle size distribution. Precise grading and grinding are required to achieve an optimized ratio of multi-component particles in order to improve cementitious activity and mechanical properties.

[0003] In the prior art, such as the grading and grinding device disclosed in Chinese utility model patent CN222550986U, although the material grading is achieved by the cooperation of an inclined screen and a pusher plate, there are significant defects: First, the pusher plate is driven by a screw reciprocating mechanism, and the material pushing progress is difficult to control precisely, and the pushing resistance is easily uneven due to the difference in particle size; Second, fine particles are easily stuck in the gap between the pusher plate and the screen, causing the equipment to jam or the screening efficiency to decrease.

[0004] Therefore, it is essential to invent a graded grinding device for processing low-carbon cementitious materials. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a grading and grinding device for processing low-carbon cementitious materials, including a housing, a feed inlet, a stagnant chamber, a feeding chamber, a discharge channel, a grinding mechanism, a drop reduction plate, support legs, a feed cover, a drive shaft, spiral blades, a drive component, and a screening plate. The upper part of the housing has an interconnected feed inlet, stagnant chamber, and feeding chamber. Several discharge channels inside the housing are connected to the feeding chamber at their upper ends, and a screening plate is installed at their upper ends. A grinding mechanism is fixedly installed at the lower part of each discharge channel, and several drop reduction plates are fixedly installed on its inner wall. Support legs are fixedly installed at the four lower corners of the housing, and a feed cover fixedly installed above them is connected to the feed inlet. A drive shaft is rotatably installed in the feeding chamber and stagnant chamber of the housing. Spiral blades are installed on the drive shaft, and one end of the drive shaft rotatably passes through the housing and is fixed to the output end of a drive component fixedly installed externally.

[0006] Preferably, the grinding mechanism includes a grinding seat, a drop hole, a grinding disc, a grinding motor, a fixed guide seat, and a fixed bracket. The grinding seat has a drop hole through its center and is fixedly installed inside the lower part of the feeding channel. The grinding disc located above it is fixed to the output end of the grinding motor. The grinding motor is embedded and fixedly installed in the fixed guide seat. The fixed guide seat is fixedly installed inside the feeding channel through the fixed bracket.

[0007] Preferably, the grinding mechanism is located below the plurality of drop mitigation plates, and a plurality of drop mitigation plates are fixedly installed symmetrically and staggered inside each of the feeding channels, and each drop mitigation plate is installed at a downward inclination.

[0008] Preferably, at the upper opening of each feeding channel, i.e. at the position communicating with the horizontal circular feeding cavity, an arc-shaped screening plate is fixedly provided. The diameters of the through holes that are provided through each other on the screening plates are different, and the diameter of the through holes of the screening plates closer to the stagnant material cavity is larger than the diameter of the through holes farther away from the stagnant material cavity.

[0009] Preferably, the feeding chamber is located above the vertically arranged unloading channel, and one end of the feeding chamber is connected to the material retention chamber on the upper side of the machine housing. The material retention chamber is an inverted rounded triangular cavity structure, and the radius of the rounded corner of the material retention chamber is the same as the radius of the feeding chamber.

[0010] Preferably, the material retention chamber is connected to the feed inlet arranged vertically above the inside of the machine housing, and the unidirectional spiral blades arranged on the drive shaft extend into the material retention chamber and the feed chamber respectively, so that the material in the material retention chamber can be transported into the feed chamber by the spiral blades.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The arc-shaped screening plate installed at the connection between the feeding chamber and the discharge channel of this utility model has a gradient increasing diameter of the through holes along the direction of the stagnant material chamber (the diameter is larger on the side closer to the stagnant material chamber). According to the target particle size of different waste residue components in low-carbon cementitious materials (such as slag requiring fine grinding and fly ash requiring coarse screening), under the combined action of gravity and the pushing force of the spiral blades, coarse particles are preferentially allowed to pass through the large-diameter area into the corresponding discharge channel, while fine particles enter the fine grinding channel after being screened by the small-diameter holes. This avoids the material jamming problem caused by the traditional pusher plate and realizes the dynamic adaptive classification of materials.

[0013] Furthermore, the drive shaft and spiral blades of this invention, which are coaxially arranged in the material retention chamber and the feeding chamber, form a spiral conveying system covering both chambers. The material retention chamber adopts an inverted rounded triangular structure, which matches the radius of the feeding chamber, eliminating dead corners where materials can stagnate. Combined with the directional pushing of the unidirectional spiral blades, the industrial waste residue mixture is fully premixed and evenly distributed before entering the screening plate, solving the grading deviation problem caused by uneven pushing in existing devices and providing a stable material input for subsequent grinding processes.

[0014] The tilting and damping plates, symmetrically installed in a staggered manner within the material feeding channel of this invention, can extend the material's falling path and control the particles to enter the grinding mechanism at an appropriate speed. Simultaneously, they reduce the impact force of the falling material, protecting the grinding mechanism below, and can also, to some extent, block dust rising upwards from below, reducing the dust's diffusion range. Attached Figure Description

[0015] Figure 1 This is a half-sectional structural diagram of the entire utility model.

[0016] Figure 2 This is a partial cross-sectional structural diagram of the entire utility model.

[0017] Figure 3 This is a utility model Figure 1 A magnified schematic diagram of the structure at point A.

[0018] In the picture:

[0019] 1. Casing; 2. Feed inlet; 3. Material retention chamber; 4. Feeding chamber; 5. Discharge channel; 6. Grinding mechanism; 61. Grinding seat; 62. Drop hole; 63. Grinding disc; 64. Grinding motor; 65. Fixed guide seat; 66. Fixed bracket; 7. Drop reduction plate; 8. Support leg; 9. Feed cover; 10. Drive shaft; 11. Spiral blade; 12. Drive component; 13. Screening plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0022] As attached Figure 1 To be continued Figure 3 As shown:

[0023] This utility model provides a grading and grinding device for processing low-carbon cementitious materials, including a housing 1, a feed inlet 2, a material retention chamber 3, a feeding chamber 4, a discharge channel 5, a grinding mechanism 6, a drop reduction plate 7, support legs 8, a feed cover 9, a drive shaft 10, spiral blades 11, a drive component 12, and a screening plate 13. The feed inlet 2, material retention chamber 3, and feeding chamber 4 are interconnected at the upper part of the interior of the housing 1. Several discharge channels 5 inside the housing 1 are connected at their upper ends to the feeding chambers 4, and screening plates 13 are installed at their upper ends. 3. A grinding mechanism 6 is fixedly installed at the bottom of each of the feeding channels 5, and several of the falling damping plates 7 are fixedly installed on its inner wall; support legs 8 are fixedly installed at the four lower corners of the housing 1, and the feed cover 9 fixedly installed above them is connected to the feed port 2; a drive shaft 10 is rotatably installed in the feeding chamber 4 and the stagnant chamber 3 of the housing 1, and a spiral blade 11 is installed on the drive shaft 10. One end of the drive shaft 10 rotates through the housing 1 and is fixed to the output end of the drive component 12 fixedly installed outside it.

[0024] Furthermore, the grinding mechanism 6 consists of a grinding base 61, a drop hole 62, a grinding disc 63, a grinding motor 64, a fixed guide seat 65, and a fixed bracket 66. The grinding base 61 is made of high-strength cast steel, with a circular drop hole 62 in the center, and is fixedly connected to the bottom of the inner wall of the feeding channel 5 by bolts. The grinding disc 63 is made of hard alloy material, with spiral grinding grooves evenly distributed on its surface. Its central shaft hole is connected to the output shaft of the grinding motor 64 by a flat key, and is axially limited by an elastic retaining ring. The grinding motor 64 is a variable frequency speed control motor, which is embedded in the cylindrical cavity inside the fixed guide seat 65 through an epoxy resin potting process. The fixed guide seat 65 is made of die-cast aluminum alloy, with radially extending connecting ears on the outside. Each ear is connected to the stainless steel fixed bracket 66 by bolts.

[0025] Furthermore, each feeding channel 5 has 5 sets of drop mitigation plates 7 evenly distributed along its height, with each set containing 2 symmetrically arranged mitigation plates. The mitigation plates 7 are made of wear-resistant steel plate bent into shape, with an installation angle of 30° to the horizontal plane. The drop mitigation plates 7 are fixed to the inner wall of the feeding channel 5 by welding, and adjacent sets of drop mitigation plates 7 are staggered in the vertical direction to form an S-shaped material falling path. The upper surface of the mitigation plates 7 has hemispherical protrusions evenly distributed to increase the frictional resistance between the material and the mitigation plates 7, prolong the material residence time, and reduce the impact force of the falling material on the grinding mechanism 6.

[0026] Furthermore, the screening plate 13 is made of stainless steel sheet by stamping, and its radius of curvature is consistent with the inner wall of the feeding cavity 4, forming an arc-shaped transition structure that seamlessly connects with the feeding cavity 4. Each screening plate 13 has evenly distributed circular through holes on its surface, with the specific hole diameter varying linearly according to its distance from the retention cavity 3: the diameter of the through hole on the first screening plate 13 closest to the retention cavity 3 is 15mm, the diameter of the through hole on the screening plate 13 in the middle position is 10mm, and the diameter of the through hole on the last screening plate 13 furthest from the retention cavity 3 is 5mm. The edges of the screening plates 13 are sealed and welded to the top of the discharge channel 5.

[0027] Furthermore, the feeding chamber 4 is a horizontally arranged cylindrical cavity, made of rolled and welded steel plate. The retaining chamber 3 is an inverted rounded triangular cavity, with the radius of its bottom corner matching that of the feeding chamber 4, forming a smooth fluid channel. The retaining chamber 3 is sealed to one end face of the feeding chamber 4 via an annular weld seam. The inner walls of both the feeding chamber 4 and the retaining chamber 3 are coated with a ceramic wear-resistant coating.

[0028] Furthermore, the feed inlet 2 is a vertically arranged pipe, and its bottom is sealed to the top interface of the stagnation chamber 3 via a flange. Cylindrical roller bearings are installed at both ends of the drive shaft 10, and the bearing housings are bolted to the side wall of the housing 1. The helical blades 11 on the drive shaft 10 are made of manganese steel sheet, and the gap between them and the inner wall of the feeding chamber 4 is controlled at 20mm. The helical blades 11 are fixed to the drive shaft 10 by welding, with continuous fillet welds at the weld joints. After one end of the drive shaft 10 extends out of the housing 1, it is connected to the output shaft of the drive component 12 via a flexible coupling. The drive component is mounted on a steel structure support on the outside of the housing 1.

[0029] The working principle is as follows: First, low-carbon cementitious material raw materials such as fly ash, slag and other industrial waste enter the feed inlet 2 through the feed hood 9 and fall into the holding chamber 3 by gravity. The drive component 12 drives the drive shaft 10 to rotate, and the spiral blades 11 on the drive shaft 10 push the raw material in the holding chamber 3 to the feeding chamber 4 at a uniform speed.

[0030] During the flow of raw materials in the feeding chamber, preliminary classification is achieved according to particle size: larger particles preferentially fall into the corresponding feeding channel 5 through the 15mm diameter through hole of the screening plate 13 near the stagnant material chamber 3, medium particles pass through the 10mm diameter through hole of the intermediate screening plate 13, and fine particles pass through the 5mm diameter through hole of the screening plate 13 away from the stagnant material chamber 3, thus completing particle size screening.

[0031] The raw material entering the feeding channel 5 falls onto the inclined drop damping plate 7 under the action of gravity. Because the drop damping plate 7 is staggered to form an S-shaped path and has hemispherical protrusions on its surface to increase frictional resistance, the falling speed of the raw material is slowed down and the residence time is extended, achieving secondary buffering and dispersion, and avoiding concentrated impact on the grinding mechanism 6 below.

[0032] When the raw material falls to the bottom of the feeding channel 5, the grinding motor 64 drives the grinding disc 63 to rotate at high speed, cooperating with the fixed grinding seat 61 to finely grind the raw material. After being processed by the grinding mechanism of the corresponding feeding channel, raw materials of different particle sizes are discharged through the drop hole 62 in the center of the grinding seat 61, finally obtaining a low-carbon cementitious material product that meets the particle size requirements.

[0033] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A grading and grinding device for processing low-carbon cementitious materials, characterized in that, The machine includes a housing (1), a feed inlet (2), a stagnation chamber (3), a feeding chamber (4), a discharge channel (5), a grinding mechanism (6), a drop reduction plate (7), support legs (8), a feed cover (9), a drive shaft (10), spiral blades (11), a drive component (12), and a screening plate (13). The upper part of the housing (1) is provided with interconnected feed inlets (2), stagnation chambers (3), and feeding chambers (4). The upper ends of several discharge channels (5) provided inside the housing (1) are connected to the feeding chambers (4), and a screening plate (13) is provided at the upper end of each discharge channel. A grinding mechanism (6) is fixedly installed at the bottom of the channel (5), and several falling damping plates (7) are fixedly installed on its inner wall; support legs (8) are fixedly installed at the four corners of the bottom of the housing (1), and the feed cover (9) fixedly installed above it is connected to the feed port (2); a drive shaft (10) is rotatably installed in the feeding chamber (4) and the stagnant chamber (3) of the housing (1), and a spiral blade (11) is installed on the drive shaft (10). One end of the drive shaft (10) rotates through the housing (1) and is fixed to the output end of the drive component (12) fixedly installed outside it.

2. The graded grinding device for processing low-carbon cementitious materials as described in claim 1, characterized in that: The grinding mechanism (6) includes a grinding seat (61), a drop hole (62), a grinding disc (63), a grinding motor (64), a fixed guide seat (65), and a fixed bracket (66). The grinding seat (61) has a drop hole (62) through its center and is fixedly installed inside the lower part of the feeding channel (5). The grinding disc (63) located above it is fixed to the output end of the grinding motor (64). The grinding motor (64) is embedded and fixedly installed in the fixed guide seat (65). The fixed guide seat (65) is fixedly installed inside the feeding channel (5) through the fixed bracket (66).

3. The graded grinding device for processing low-carbon cementitious materials as described in claim 2, characterized in that: The grinding mechanism (6) is located below several of the falling damping plates (7). Several falling damping plates (7) are fixedly installed inside each of the feeding channels (5) in a staggered and symmetrical manner. Each falling damping plate (7) is installed at a downward tilt.

4. The graded grinding device for processing low-carbon cementitious materials as described in claim 3, characterized in that: At the upper opening of each feeding channel (5), i.e. the position connecting with the horizontal circular feeding cavity (4), an arc-shaped screening plate (13) is fixedly provided. The diameters of the through holes that are provided through each other in the screening plates (13) are different. The diameter of the through holes of the screening plate (13) closer to the stagnant material cavity (3) is larger than the diameter of the through holes further away from the stagnant material cavity (3).

5. The graded grinding device for processing low-carbon cementitious materials as described in claim 4, characterized in that: The feeding chamber (4) is located above the vertically arranged unloading channel (5). One end of the feeding chamber (4) is connected to the material retention chamber (3) on the upper side inside the casing (1). The material retention chamber (3) is an inverted rounded triangular cavity structure, and the radius of the rounded corner of the material retention chamber (3) is the same as the radius of the feeding chamber (4).

6. The graded grinding device for processing low-carbon cementitious materials as described in claim 5, characterized in that: The material retention chamber (3) is connected to the feed inlet (2) arranged vertically above the inside of the housing (1). The unidirectional spiral blades (11) arranged on the drive shaft (10) extend into the material retention chamber (3) and the feeding chamber (4) respectively. The material in the material retention chamber (3) can be transported to the feeding chamber (4) by the spiral blades (11).

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