Device for uniformly dispersing auxiliaries in cement powder

Abstract

The utility model discloses a device for uniformly dispersing auxiliaries in cement powder. The device comprises a vertical stirrer, a spraying mechanism, an auxiliary liquid storage tank, a conveying mechanism, a grinding machine and a filter. Wherein a stirrer of the vertical stirrer comprises a rotating shaft, an auger blade and a stirring rod. And the rotating shaft is vertically arranged in an inner cavity of the vertical stirrer. And the auger blade and the stirring rod are fixed on the rotating shaft. The spraying mechanism is arranged below the top surface in the inner cavity of the vertical stirrer and is connected with the additive liquid storage tank through a liquid conveying pump. A feeding hole of the conveying mechanism is connected with a bottom outlet of the vertical stirrer, and a control valve is arranged in the outlet. A discharging port of the conveying mechanism is connected with a feeding port of the grinding machine, the grinding machine is provided with an exhaust port, and the exhaust port is connected with the filter. The device can effectively improve the dispersity of the auxiliary agent in the cement powder and improve the quality stability of the prepared cement mortar.

Description

Technical Field

[0001] The utility model relates to the field of cement dispersion equipment, in particular to a device for uniformly dispersing an additive in cement powder. Background Art

[0002] Cement mortar is widely used in building engineering as a bonding material, caulking material, plastering material, etc. For example, materials such as bricks need to be bonded by cement mortar to improve their integrity and firmness. The gaps between bricks or other building materials usually need to be filled with cement mortar to improve the overall strength and aesthetics of the wall. Cement mortar can also fill defects such as pits on the wall surface to improve the flatness and smoothness of the wall surface. Adding various additives (such as water reducers, retarders, accelerators, rust inhibitors, early strength agents, waterproof agents) to cement mortar is an important measure to improve or control the performance of the mortar. When adding additives, usually the additives are directly mixed with raw materials such as cement powder, sand, and water and then stirred to form cement mortar. However, the addition amount of additives in cement mortar is generally small, and some liquid additives are viscous and the adsorption of cement particles is strong. The above simple mixing and stirring method is likely to cause uneven dispersion of additives in cement mortar, and then lead to large performance differences in different batches of prepared cement mortar, making the quality of the cement mortar produced by enterprises unstable. Summary of the Utility Model

[0003] In view of the above problems, the utility model provides a device for uniformly dispersing an additive in cement powder, which can effectively improve the dispersibility of the additive in the cement powder and improve the quality stability of the prepared cement mortar. Specifically, the technical solution of the utility model is as follows.

[0004] A device for uniformly dispersing an additive in cement powder includes: a vertical mixer, a spraying mechanism, an additive storage tank, a conveying mechanism, a grinder, and a filter. Among them: the agitator of the vertical mixer includes a first motor, a first rotating shaft, a screw blade, and a stirring rod. The first motor is arranged on the top surface of the vertical mixer, the first rotating shaft is vertically arranged in the inner cavity of the vertical mixer and the upper end is connected with the first motor. The screw blade and the stirring rod are both fixed on the first rotating shaft. The spraying mechanism is arranged below the top surface in the inner cavity of the vertical mixer, and the spraying mechanism is connected with the additive storage tank through an infusion pump. The inlet of the conveying mechanism is connected with the bottom outlet of the vertical mixer, and a control valve is arranged in the outlet. The outlet of the conveying mechanism is connected with the inlet of the grinder, the grinder has an exhaust port, and the exhaust port is connected with the filter.

[0005] Further, the inlet of the vertical mixer is connected through a hoist, and the lower inlet of the hoist is located in a cement powder storage tank.

[0006] Further, the spraying mechanism includes an infusion tube and a nozzle. The nozzle is fixed on the infusion tube, and the infusion tube is connected to the auxiliary agent storage tank through the infusion pump.

[0007] Further, the filter is connected to the condenser, and the condenser is connected to the recovery tank to recover the volatile non-aqueous solvent used for dispersing the auxiliary agent that has condensed.

[0008] Further, the grinder includes a tank body, a second motor, a second rotating shaft, a grinding head, and a grinding seat. Among them: the second motor is arranged on the top surface of the tank body, the second rotating shaft is located in the tank body and is arranged vertically, and the upper end of the second rotating shaft is connected to the second motor. The grinding head is fixed on the lower end surface of the second rotating shaft, the grinding seat is fixed in the inner cavity of the tank body, and the grinding head is located in the grinding hole of the grinding seat. The bottom surface of the tank body has a discharge port corresponding to the grinding hole.

[0009] Further, a mesh dispersion plate is arranged below the feed inlet of the grinder, and the mesh dispersion plate is sleeved on the second rotating shaft to disperse the incoming cement powder.

[0010] Further, the grinding seat is provided with a heater to accelerate the removal of the volatile non-aqueous solvent in the cement powder.

[0011] Further, the grinding head is of a frustum of a cone structure, the grinding hole is of a conical structure, and there is a gap between the two.

[0012] Further, the surface of the grinding head has protrusions to accelerate the grinding of the cement powder.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] The device for uniformly dispersing the auxiliary agent in the cement powder of the present utility model can first use the spraying mechanism to gradually spray the auxiliary agent to be added into the cement powder continuously stirred in the vertical mixer. At the same time, both a spiral blade and a stirring rod are arranged on the rotating shaft of the stirrer of the vertical mixer. While stirring and dispersing, the spiral blade can also make the cement powder generate a certain upward movement, which helps the cement powder at the lower part move to the upper part and mix with the sprayed auxiliary agent, improving the dispersibility of the auxiliary agent in the cement powder. After being stirred and dispersed, the cement powder further enters the grinder and is ground, further increasing the dispersibility of the auxiliary agent in the cement powder and improving the quality stability of the prepared cement mortar. At the same time, the frictional heat generated by grinding can also help remove the volatile non-aqueous solvent used for dispersing the auxiliary agent. Description of the Drawings

[0015] The accompanying drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0016] Figure 1 It is a schematic structural diagram of the device for uniformly dispersing the auxiliary agent in the cement powder in the embodiment.

[0017] Figure 2 It is a schematic structural diagram of the grinding seat in the embodiment.

[0018] Figure 3 It is a schematic structural diagram of the net-shaped dispersion plate in the embodiment.

[0019] The numerical marks in the above-mentioned drawings respectively represent: 1 - vertical mixer, 2 - spraying mechanism, 3 - auxiliary agent storage tank, 4 - conveying mechanism, 5 - grinder, 6 - filter, 7 - elevator, 8 - cement powder storage tank, 9 - condenser, 10 - recovery tank, 101 - first motor, 102 - first rotating shaft, 103 - auger blade, 104 - stirring rod, 105 - infusion pump, 501 - tank body, 502 - second motor, 503 - second rotating shaft, 504 - grinding head, 505 - grinding seat, 506 - grinding hole, 507 - net-shaped dispersion plate, 508 - heater. Detailed implementation manners

[0020] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present utility model, they only represent the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to needs to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0021] It should be noted that the following detailed descriptions are all illustrative and are intended to provide a further description of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The device for uniformly dispersing the auxiliary agent in the cement powder of the present utility model will be further described in conjunction with the accompanying drawings and specific implementation manners.

[0022] Reference Figure 1 and Figure 2, An example of a device for uniformly dispersing additives in cement powder includes: a vertical mixer 1, a spraying mechanism 2, an additive storage tank 3, a conveying mechanism 4, a grinder 5, and a filter 6. The vertical mixer 1 has a stirrer formed by a first motor 101, a first rotating shaft 102, auger blades 103, and stirring rods 104. Among them: The first motor 101 is fixed on the top surface of the vertical mixer 1, the first rotating shaft 102 is vertically arranged in the inner cavity of the vertical mixer 1, and the upper end of the first rotating shaft 102 is connected to the first motor 101. The auger blades 103 are fixed on the first rotating shaft 102 and are distributed along its height direction. A plurality of the stirring rods 104 are horizontally and uniformly fixed on the first rotating shaft 102.

[0023] The spraying mechanism 2 includes an infusion pipe and a nozzle. Among them, the infusion pipe is horizontally fixed below the top surface in the inner cavity of the vertical mixer 1, and a plurality of the nozzles are uniformly fixed on the infusion pipe and communicate with the lumen of the infusion pipe. At the same time, the infusion pipe is connected to the additive storage tank 3 through an infusion pump 105. The additive storage tank 3 is used to store liquid additives or a dispersion formed by additives (solid or liquid) dispersed in a water-free volatile non-aqueous solvent. The solvent can be anhydrous methanol, anhydrous ethanol, etc. These solvents have good volatility and are convenient for removing from the cement powder. The nozzle can be an atomizing nozzle, etc. A metering device such as a flow meter can also be provided on the pipeline between the additive storage tank 3 and the infusion pump 105 to control the infusion volume. During use, a hoist 7 (such as a vertical or inclined auger conveyor) can be used to convey the cement powder in the cement powder storage tank 8 to the vertical mixer 1. The discharge port at the upper part of the hoist 7 is connected to the feed port of the vertical mixer 1, and the lower feed port of the hoist 7 is located in the cement powder storage tank 8.

[0024] Then start the stirrer and the spraying mechanism 2. As the cement powder is continuously agitated, the liquid additive or dispersion in the additive storage tank 3 is gradually sprayed into the cement powder through the nozzle under the conveyance of the infusion pump 105. At the same time, while the rotating shaft 102 of the stirrer agitates and disperses the cement powder using the stirring rods 104, it can also cause the cement powder to have a certain upward movement through the auger blades 103, which helps the cement powder at the lower part to move to the upper part and mix with the sprayed additives, improving the dispersion of the additives in the cement powder. Compared with the method of adding the additives to raw materials such as cement powder all at once and then stirring, the method of this embodiment is more helpful for improving the dispersion and uniformity of the additives in the cement powder.

[0025] The conveying mechanism 4 can be a screw conveyor, whose feeding port is connected to the bottom outlet of the vertical mixer 1, and a control valve is arranged in this outlet, which is closed during the mixing stage. When it is necessary to discharge the cement powder after completion, the control valve is opened to open the bottom outlet of the vertical mixer 1, so that the cement powder therein gradually enters the conveying mechanism 4 and is conveyed to the grinder 5. The discharge port of the conveying mechanism 4 is connected to the feeding port of the grinder 5. The top of the grinder 5 has an exhaust port, and this exhaust port is connected to the filter 6 fixed on the top surface of the grinder 5. The exhaust port is used for discharging the volatile non-aqueous solvent in the grinder 5, and the filter 6 is used to prevent the cement powder from being discharged from the exhaust port. During use, after the cement powder preliminarily dispersed in the vertical mixer 1 enters the grinder 5, the dispersibility of the additives in the cement powder can be further improved under the grinding action, and the quality stability of the prepared cement mortar can be improved. In addition, the frictional heat generated during the grinding process also helps to remove the volatile non-aqueous solvent in the cement powder, obtaining dry and uniform cement powder. The discharge port on the bottom surface of the grinder 5 is in an open state, facilitating the discharge of the cement powder with additives and the volatile non-aqueous solvent in the space. The discharged cement powder with additives can be used to prepare mortar with sand, water, etc.

[0026] In another embodiment, as Figure 1 shown, the device for uniformly dispersing additives in cement powder in the above embodiment further includes a condenser 9 and a recovery tank 10. Among them: the filter 6 is connected to this condenser 9, and the condenser 9 is connected to the recovery tank 10. The condenser 9 is used to condense the discharged volatile non-aqueous solvent and then discharge it into the recovery tank 10 for recycling. Further, an air extractor or the like can be used to accelerate the discharge of the volatile non-aqueous solvent in the grinder 5. An exhaust port can also be arranged on the top surface of the vertical mixer 1, and this exhaust port, the filter, and the above-mentioned condenser 9 are connected in sequence.

[0027] In another embodiment, as Figure 1As shown in the figure, the grinder 5 of the device for uniformly dispersing the auxiliary agent in the cement powder in the above embodiment includes: a tank body 501, a second motor 502, a second rotating shaft 503, a grinding head 504 and a grinding seat 505. Among them: The second motor 502 is fixed on the top surface of the tank body 501, the second rotating shaft 503 is vertically arranged in the tank body 501, and the upper end of the second rotating shaft 503 is connected to the second motor 502. The grinding head 504 is of a frustum of a cone structure, which is fixed on the lower end surface of the second rotating shaft 503. The grinding seat 505 is fixed in the inner cavity of the tank body 501. The grinding head 504 is located in the grinding hole 506 of the grinding seat 505. The grinding hole 506 is of a conical structure, and there is a gap between the conical surface of the grinding head 504 and the grinding hole 506 for grinding the cement powder and then discharging it to the bottom of the tank body 501. The bottom surface of the tank body 501 has a discharge port 506 corresponding to the grinding hole 506. The surface of the grinding head 504 has protrusions to accelerate the grinding of the cement powder.

[0028] In another embodiment, as Figure 1 and Figure 3 shown, a net-shaped dispersion plate 507 is arranged below the feed inlet of the grinder 5 of the device for uniformly dispersing the auxiliary agent in the cement powder in the above embodiment. The net-shaped dispersion plate 507 is sleeved on the second rotating shaft 503 and can thus rotate synchronously with the second rotating shaft 503. When the second rotating shaft 503 rotates, the cement powder gradually fed by the conveying mechanism 4 (screw conveyor) falls onto the net-shaped dispersion plate 507, facilitating the dispersion of the cement powder around the grinding head 504, preventing the accumulation of the cement powder and improving the grinding efficiency.

[0029] In another embodiment, as Figure 1 shown, the grinding seat 505 of the grinder 5 of the device for uniformly dispersing the auxiliary agent in the cement powder in the above embodiment is provided with a heater 508. When in seasons with relatively low ambient temperatures such as winter, after the heater 508 is powered on, it can heat the grinding seat 505, and further heat the cement powder in the grinder 5 to accelerate the removal of the volatile non-aqueous solvent therein.

[0030] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for uniformly dispersing an auxiliary agent in cement powder, characterized in that, Comprising: A vertical mixer, wherein the agitator of the vertical mixer includes a first motor, a first rotating shaft, a screw blade, and a stirring rod; The first motor is arranged on the top surface of the vertical mixer, the first rotating shaft is vertically arranged in the inner cavity of the vertical mixer and its upper end is connected to the first motor; the screw blade and the stirring rod are both fixed on the first rotating shaft; A spraying mechanism, which is arranged below the top surface in the inner cavity of the vertical mixer, and the spraying mechanism is connected to an auxiliary agent storage tank through an infusion pump; A conveying mechanism, the inlet of which is connected to the bottom outlet of the vertical mixer, and a control valve is arranged in this outlet; A grinder, the outlet of the conveying mechanism is connected to the inlet of the grinder; A filter, the grinder has an exhaust port, and this exhaust port is connected to the filter.

2. The device for uniformly dispersing an auxiliary agent in cement powder according to claim 1, wherein The feed inlet of the vertical mixer is connected through a hoist, and the lower feed inlet of the hoist is located in a cement powder storage tank.

3. The device for uniformly dispersing the auxiliary agent in the cement powder according to claim 1, characterized in that, The spraying mechanism includes an infusion pipe and a nozzle; the nozzle is fixed on the infusion pipe, and the infusion pipe is connected to the auxiliary agent storage tank through the infusion pump.

4. The device for uniformly dispersing additives in cement powder according to claim 1, characterized in that, The filter is connected to a condenser, and the condenser is connected to a recovery tank.

5. The device for uniformly dispersing an auxiliary agent in cement powder according to any one of claims 1-4, characterized in that, The grinder includes a tank body, a second motor, a second rotating shaft, a grinding head, and a grinding seat; wherein: the second motor is arranged on the top surface of the tank body, the second rotating shaft is located in the tank body and is vertically arranged, the upper end of the second rotating shaft is connected to the second motor; the grinding head is fixed on the lower end surface of the second rotating shaft, the grinding seat is fixed in the inner cavity of the tank body, and the grinding head is located in the grinding hole of the grinding seat; the bottom surface of the tank body has a discharge port corresponding to the grinding hole.

6. The device for uniformly dispersing an auxiliary agent in cement powder according to claim 5, wherein, A mesh dispersion plate is arranged below the inlet of the grinder, and the mesh dispersion plate is sleeved on the second rotating shaft.

7. The device for uniformly dispersing the auxiliary agent in the cement powder according to claim 5, wherein The grinding seat is provided with a heater.

8. The device for uniformly dispersing the auxiliary agent in the cement powder according to claim 5, characterized in that, The grinding head is of a frustum of a cone structure, the grinding hole is of a conical structure, and there is a gap between the two.

9. The device for uniformly dispersing an auxiliary agent in cement powder according to claim 5, characterized in that, The surface of the grinding head has protrusions.

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