Coal ash and mineral powder double-blending mixing device

Abstract

The utility model relates to the technical field of concrete, in particular to a coal ash and mineral powder double-mixing device. The coal ash and mineral powder double-blending mixing device comprises a mixing barrel, one end of the mixing barrel is connected with a porous shunting barrel, an overflow disc is fixedly embedded in the mixing barrel, and overflow holes are formed in the overflow disc; a rotating shaft is mounted in the mixing barrel, a strip-shaped spiral blade is mounted on the rotating shaft, and a rotating disc is mounted at the extending end of the rotating shaft. According to the coal ash and mineral powder double-blending mixing device provided by the utility model, materials are primarily conveyed and stirred by the strip-shaped spiral blade in the mixing barrel, and then the homogenization degree of powder admixtures such as coal ash, mineral powder and the like is remarkably improved through a dynamic shunting and stirring blade mixing mechanism, so that the problem of non-uniform mixing of traditional equipment is solved; due to the periodical opening and closing of the rotating disc and the overflow disc, not only is the dynamic shunting realized, but also the material flow is forcibly cut and dispersed in the shunting process, so that the mixing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete, in particular to a device for double blending of fly ash and slag powder. Background Technique

[0002] In the field of concrete production, fly ash and slag powder, as important mineral admixtures for concrete, are widely used in modern concrete projects because they have the advantages of improving the workability of concrete, increasing the later strength, enhancing the durability and reducing the hydration heat. Especially in the preparation of high-performance concrete and green concrete, the double blending technology of fly ash and slag powder has become one of the key technologies. However, there are differences in the physical properties (such as density, particle size, surface properties, etc.) of fly ash and slag powder. When traditional mixing equipment for concrete preparation (such as single-shaft / double-shaft horizontal mixers, planetary mixers) mixes cement and these two powder materials, there are often problems of insufficient mixing uniformity and low mixing efficiency. The powder materials are prone to agglomeration or stratification, and it is difficult to achieve an ideal homogenized state, which affects the final performance of the concrete.

[0003] Therefore, it is necessary to provide a new device for double blending of fly ash and slag powder to solve the above technical problems. Content of the Utility Model

[0004] To solve the above technical problems, the utility model provides a device for double blending of fly ash and slag powder.

[0005] The device for double blending of fly ash and slag powder provided by the utility model includes a mixing cylinder. One end of the mixing cylinder is fixedly connected by bolts with a coaxially arranged porous diversion cylinder. An overflow plate is fixedly embedded on the cylinder mouth of the mixing cylinder corresponding to the porous diversion cylinder. A plurality of fan-shaped distributed overflow holes are opened on the overflow plate;

[0006] A rotating shaft rotatably connected is installed in the mixing cylinder, and a strip-shaped spiral blade is fixedly installed on the rotating shaft. One end of the rotating shaft penetrates through the overflow plate and extends into the porous diversion cylinder;

[0007] A rotating disk is fixedly installed at the extended end of the rotating shaft, and a feed hole corresponding to the overflow hole is opened on the rotating disk. The rotating disk is in mutual fit with the overflow plate;

[0008] A rotating rod is fixedly installed on the rotating disk, and a plurality of annularly distributed stirring blades are fixedly installed on the rotating rod.

[0009] Preferably, a blocking plate connected in a sliding manner is further installed in the porous diversion cylinder, and a damping member is installed at one end of the blocking plate facing away from the rotating disk.

[0010] Preferably, the damping member includes a sleeve, the sleeve is fixedly installed on the inner wall of one end of the porous flow dividing cylinder away from the rotating disk, and a sliding rod connected in a sliding manner is inserted into the sleeve, and the rod head of the sliding rod is fixedly connected to the material blocking disk;

[0011] The sleeve and the sliding rod form a telescopic rod structure, and a spring is sleeved on the telescopic rod structure. One end of the spring is on the inner wall of one end of the porous flow dividing cylinder away from the rotating disk, and the other end of the spring is fixedly connected to the material blocking disk.

[0012] Preferably, a blanking port is formed in the lower cylindrical surface of the porous flow dividing cylinder, and the blanking port is located on one side of the porous flow dividing cylinder away from the rotating disk.

[0013] Preferably, a feed hopper is installed on the mixing cylinder.

[0014] Preferably, a reduction motor for driving the rotating shaft to rotate is fixedly installed on the mixing cylinder through a frame.

[0015] Preferably, support frames are fixedly installed on both the mixing cylinder and the porous flow dividing cylinder.

[0016] Compared with the related art, the fly ash and slag powder double-blending device provided by the present invention has the following beneficial effects:

[0017] In the present invention, the materials are first preliminarily transported and stirred in the mixing cylinder by the strip-shaped spiral blades, and then the dynamic flow division and the mixing mechanism of the mixing blades significantly improve the homogenization degree of the powder admixtures such as fly ash and slag powder, solve the problem of uneven mixing of the traditional equipment, and the periodic opening and closing of the rotating disk and the overflow disk not only realize the dynamic flow division, but more importantly, forcibly cut and disperse the material flow during the flow division process, break the powder agglomeration, and further improve the mixing effect. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of a preferred embodiment of the fly ash and slag powder double-blending device provided by the present invention;

[0019] Figure 2 It is Figure 1 the sectional structural schematic diagram shown;

[0020] Figure 3 It is Figure 2 the sectional structural schematic diagram of the mixing cylinder shown;

[0021] Figure 4 It is Figure 2 the sectional structural schematic diagram of the porous flow dividing cylinder shown.

[0022] Reference Numerals in the Figures: 1, mixing cylinder; 11, overflow tray; 11a, overflow hole; 12, feed hopper; 2, porous diversion cylinder; 2a, blanking port; 3, rotating shaft; 4, strip-shaped spiral blade; 5, reduction motor; 6, rotating disk; 6a, feed hole; 7, rotating rod; 71, stirring blade; 8, material blocking disk; 9, damping member; 91, sleeve; 92, sliding rod; 93, spring; 1-2, support frame. Detailed Implementation Manner

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0025] Please refer to Figures 1 to 4 A fly ash and slag double-blending mixing device provided by an embodiment of the present utility model, the fly ash and slag double-blending mixing device includes a mixing cylinder 1 and a porous diversion cylinder 2.

[0026] In an embodiment of the present utility model, please refer to Figures 1 to 4 . A feed hopper 12 is installed on the mixing cylinder 1, and one end of the mixing cylinder 1 is fixedly connected by bolts to a coaxially arranged porous diversion cylinder 2. An overflow tray 11 is fixedly fitted on the corresponding barrel mouth of the mixing cylinder 1 and the porous diversion cylinder 2. A plurality of fan-shaped distributed overflow holes 11a are opened on the overflow tray 11. A rotatably connected rotating shaft 3 is installed in the mixing cylinder 1, and a strip-shaped spiral blade 4 is fixedly installed on the rotating shaft 3. One end of the rotating shaft 3 penetrates through the overflow tray 11 and extends into the porous diversion cylinder 2. A reduction motor 5 for driving the rotation of the rotating shaft 3 is fixedly installed on the mixing cylinder 1 through a frame.

[0027] It should be noted that: Cement, fly ash, slag and water liquid are all put into the mixing cylinder 1 from the feed hopper 12 according to a ratio. Subsequently, the reduction motor 5 is started to drive the rotation of the rotating shaft 3. Therefore, the strip-shaped spiral blade 4 can convey cement, fly ash and slag towards the porous diversion cylinder 2. And because the edge of the strip-shaped spiral blade 4 is discontinuous and forms a strip, the material is more likely to "leak down" from the edge of the blade during the conveying process and mix with the subsequent material. Therefore, it can be stirred.

[0028] And in this embodiment: The rotating shaft 3 penetrates through the center of the overflow tray 11 and is rotatably connected to the through hole at the center of the overflow tray 11. A sealing ring is installed on the through hole opened at the center of the overflow tray 11 to prevent the leakage of concrete.

[0029] In an embodiment of the present utility model, please refer to Figures 1 to 4, a rotating disk 6 is fixedly installed at the extended end of the rotating shaft 3, and a feed hole 6a corresponding to the overflow hole 11a is formed in the rotating disk 6. The rotating disk 6 is in close contact with the overflow disk 11. A rotating rod 7 is fixedly installed on the rotating disk 6, and a plurality of annularly distributed stirring blades 71 are fixedly installed on the rotating rod 7. A blanking port 2a is formed in the lower cylindrical surface of the porous flow dividing cylinder 2, and the blanking port 2a is located on the side of the porous flow dividing cylinder 2 away from the rotating disk 6;

[0030] A blocking plate 8 connected in a sliding manner is further installed in the porous flow dividing cylinder 2, and a damping member 9 is installed at one end of the blocking plate 8 facing away from the rotating disk 6. The damping member 9 includes a sleeve 91 fixedly installed on the inner wall of the end of the porous flow dividing cylinder 2 away from the rotating disk 6. A sliding rod 92 connected in a sliding manner is inserted into the sleeve 91. The rod head of the sliding rod 92 is fixedly connected to the blocking plate 8. The sleeve 91 and the sliding rod 92 form a telescopic rod structure, and a spring 93 is sleeved on the telescopic rod structure. One end of the spring 93 is on the inner wall of the end of the porous flow dividing cylinder 2 away from the rotating disk 6, and the other end of the spring 93 is fixedly connected to the blocking plate 8.

[0031] It should be noted that: since the rotating disk 6 is fixedly installed at the extended end of the rotating shaft 3, when the rotating shaft 3 rotates, the rotating disk 6 rotates synchronously. When the feed hole 6a on the rotating disk 6 rotates to correspond to the overflow hole 11a on the overflow disk 11, the overflow hole 11a and the feed hole 6a form a flow channel structure. At this time, part of the mixture is diverted into the porous flow dividing cylinder 2 through the flow channel structure, and the mixture is forced to be dispersed twice by the flow channel structure. The mixture entering the porous flow dividing cylinder 2 is mixed and stirred again by the stirring blades 71. When the feed hole 6a on the rotating disk 6 is misaligned with the overflow hole 11a on the overflow disk 11, the mixture in the mixing cylinder 1 is further stirred by the strip-shaped spiral blade 4;

[0032] Therefore, while the mixture in the mixing cylinder 1 is being stirred, part of the mixture continuously enters the porous flow dividing cylinder 2 through secondary dispersion and is mixed and stirred again by the stirring blades 71, realizing the multi-level stirring work of multiple mixing-separation-mixing of the material, and effectively realizing the high-efficiency homogenization of the double-blended powder.

[0033] It should also be noted that: when there is not much material between the material blocking plate 8 and the rotating disc 6, due to the engagement of the material blocking plate 8, the material is retained in the cavity between the material blocking plate 8 and the rotating disc 6 and stirred by the stirring blade 71. When the material between the material blocking plate 8 and the rotating disc 6 increases and its pressure is greater than the pressure of the spring 93, the material blocking plate 8 slides towards the tail of the porous diversion cylinder 2 and compresses the spring 93. When the material blocking plate 8 slides past the material dropping port 2a, the mixture is discharged from the material dropping port 2a. When the pressure of the material in the cavity between the material blocking plate 8 and the rotating disc 6 is less than the elastic force of the spring 93, the material blocking plate 8 slides past the material dropping port 2a again so that the material is in the cavity between the material blocking plate 8 and the rotating disc 6 and stirred by the stirring blade 71. As the pressure of the newly entered mixed material is greater than the spring 93 subsequently, the mixture is discharged again.

[0034] In this embodiment: in order to avoid material residue between the material blocking plate 8 and the rotating disc 6, a sewage discharge valve can be provided on the lower cylinder wall of the porous diversion cylinder 2 close to the rotating disc 6, so as to discharge the finally remaining mixture.

[0035] Furthermore, support frames 1-2 are fixedly installed on both the mixing cylinder 1 and the porous diversion cylinder 2, thereby improving the stability of the mixing cylinder 1 and the porous diversion cylinder 2.

[0036] The working principle of the fly ash and mineral powder double-blending mixing device provided by the present utility model is as follows:

[0037] The material is first preliminarily conveyed and stirred in the mixing cylinder 1 by the strip-shaped spiral blade 4 (the edge of the spiral blade 4 is conducive to the turning and mixing of the material). Subsequently, through the periodic alignment of the feeding hole 6a and the overflow hole 11a, part of the mixture is forced to be dispersed and diverted into the porous diversion cylinder 2 for re-stirring by the stirring blade 71. This dynamic diversion and re-mixing mechanism significantly improves the homogenization degree of powder admixtures such as fly ash and mineral powder, and solves the problem of uneven mixing of traditional equipment. The periodic opening and closing of the rotating disc 6 and the overflow disc 11 (forming a flow channel when the holes are aligned and closing when they are misaligned) not only realizes dynamic diversion, but more importantly, forcibly cuts and disperses the material flow during the diversion process, breaks the powder agglomeration, and further improves the mixing effect;

[0038] The design of the material blocking plate 8 and the damping member 9 constitutes a pressure control valve. When the pressure of the material in the cavity between the rotating disc 6 and the material blocking plate 8 accumulates to be sufficient to overcome the pre-tightening force of the spring 93, the material blocking plate 8 moves backward to expose the material dropping port 2a for discharging. After the pressure decreases, the spring 93 pushes the material blocking plate 8 to reset and close the material dropping port 2a, and the material continues to be stirred in the cavity. This mechanism ensures that the material has sufficient stirring residence time in the porous diversion cylinder 2 and is discharged orderly after reaching a certain mixing degree and pressure, effectively reducing the ineffective space and material residue, and improving the uniformity and controllability of discharging.

[0039] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated herein.

[0040] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A device for double-doping fly ash and mineral powder admixture, characterized in that, It includes a mixing cylinder (1). One end of the mixing cylinder (1) is fixedly connected by bolts with a coaxially arranged porous shunt cylinder (2). And an overflow plate (11) is fixedly fitted on the cylinder opening of the mixing cylinder (1) corresponding to the porous shunt cylinder (2). A plurality of fan-shaped distributed overflow holes (11a) are formed on the overflow plate (11). A rotatable shaft (3) is rotatably connected inside the mixing cylinder (1). And a strip-shaped spiral blade (4) is fixedly installed on the rotatable shaft (3). One end of the rotatable shaft (3) penetrates through the overflow plate (11) and extends into the porous shunt cylinder (2). A rotating disk (6) is fixedly installed at the extending end of the rotatable shaft (3). And a feed hole (6a) corresponding to the overflow hole (11a) is formed on the rotating disk (6). The rotating disk (6) is in close contact with the overflow plate (11). A rotating rod (7) is fixedly installed on the rotating disk (6). And a plurality of annularly distributed stirring blades (71) are fixedly installed on the rotating rod (7).

2. The fly ash and slag powder double-blending device according to claim 1, characterized in that A blocking plate (8) is slidably connected inside the porous shunt cylinder (2). And a damping member (9) is installed at one end of the blocking plate (8) facing away from the rotating disk (6).

3. The fly ash and slag powder dual admixture device according to claim 2, characterized in that The damping member (9) includes a sleeve (91). The sleeve (91) is fixedly installed on the inner wall of the end of the porous shunt cylinder (2) away from the rotating disk (6). And a sliding rod (92) is inserted and slidably connected inside the sleeve (91). The rod head of the sliding rod (92) is fixedly connected with the blocking plate (8). The sleeve (91) and the sliding rod (92) form a telescopic rod structure. And a spring (93) is sleeved on the telescopic rod structure. One end of the spring (93) is on the inner wall of the end of the porous shunt cylinder (2) away from the rotating disk (6). And the other end of the spring (93) is fixedly connected with the blocking plate (8).

4. The fly ash and slag powder double-blending device according to claim 1, characterized in that, A blanking port (2a) is formed on the lower cylinder surface of the porous shunt cylinder (2). And the blanking port (2a) is located on one side of the porous shunt cylinder (2) away from the rotating disk (6).

5. The fly ash and slag powder double-blending device according to claim 1, characterized in that A feed hopper (12) is installed on the mixing cylinder (1).

6. The fly ash and slag powder double-blending device according to claim 1, characterized in that, A reduction motor (5) for driving the rotatable shaft (3) to rotate is fixedly installed on the mixing cylinder (1) through a frame.

7. The fly ash and slag powder double-blending device according to claim 1, wherein Support frames (1-2) are fixedly installed on both the mixing cylinder (1) and the porous shunt cylinder (2).

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