Preparation device of cement sol slurry

Abstract

The invention provides a preparation device of cement sol slurry, comprising: a main body frame, the main body frame comprising a top plate, side plates and a bottom plate; the stirring container is provided with an opening, a cover body capable of being opened and closed is arranged on the opening, and the stirring container is arranged in the main body frame in a turnover mode; the immersion type ultrasonic vibration device is arranged on the cover body in a penetrating manner; the stirring device is arranged on one side, far away from the immersion type ultrasonic vibration device, in the stirring container. Compared with the prior art, the preparation device disclosed by the invention has the advantages that the stirring device and the ultrasonic vibration device are reasonably arranged and are matched with the action of the attached ultrasonic transducer, so that the gel formed after the cement sol slurry is cured has few pores and is uniform and compact, and the preparation device can be well suitable for small-scale production in scenes such as laboratories and the like; and the pouring efficiency and the moving convenience of the cement sol slurry are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of concrete preparation, in particular to a cement slurry preparation device with sol properties. Background Art

[0002] Cement is mixed with water to make cement paste, and cement paste is mixed with aggregate to make concrete. The sol formed by the dissolution of cement particles in the cement paste in water is the adhesive in the concrete that binds the aggregates together. The conventional process from preparing cement paste to mixing concrete is a continuous process or a process with a short interval, usually not more than 5 minutes. Since cement is a silicate mineral particle, its dissolution rate is relatively slow. Many research results show that the process of complete dissolution and hydration of cement particles can take as long as 1 year to several decades. Therefore, the sol content in the cement paste when mixing concrete by the conventional process is relatively low. This cement paste is essentially just a suspension of cement particles containing a small amount of sol. The sol content in the cement paste that plays a gelling role is thin, which affects the development of concrete strength after molding and hardening. In addition, the cement paste suspension contains a large amount of excess water that does not participate in hydration. After evaporation, a large number of tiny pores will be formed, which will not only affect the development of concrete strength but also cause the concrete to shrink and deteriorate in impermeability.

[0003] In order to improve the problem of insufficient solubility of cement particles in cement slurry, the cement slurry can be prehydrated at present, that is, the cement slurry is stirred with a high-speed mixer to accelerate the dissolution of cement particles. However, since the speed of the cement slurry high-speed mixer usually does not exceed 20r / s, that is, 1200r / min, and is limited by the setting time of cement, the initial setting time of ordinary silica cement is about 150-200 minutes, and it cannot be stirred at high speed for a long time, so it cannot effectively solve the problem of insufficient dissolution of cement particles. Therefore, the cement slurry prehydrated by high-speed stirring is still a cement particle suspension containing only a small amount of sol, and its effect is very limited. Therefore, this method is basically not used in concrete production. There are also some studies that prehydrate cement slurry for a long time, and the prehydration time can be up to several days. At this time, the cement sol in the cement slurry has solidified to form gel and crystals, and cannot be used directly to mix concrete. It can only be used as a "seed" in small amounts, usually not more than 3% of the total cement slurry, and added to the newly mixed cement slurry. Because the mechanism explanation is still incomplete, this method is only used in laboratory research and has basically not been used in actual production. Some studies have also used ultrasonic high-frequency vibration to homogenize cement paste or concrete to improve the dispersion of cement particles, but the implementation time is usually no more than 5 minutes, and it can only disperse the cement particles in the concrete to a certain extent, that is, the homogenization effect.

[0004] At present, the hydration degree of cement particles in cement slurry obtained by the above method is less than 15%, and it is essentially still a suspension of cement particles. Mixing concrete with it leads to a variety of recognized concrete microstructural defects. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a device for preparing cement sol slurry, which aims to improve the strength of concrete and reduce the shrinkage of concrete without affecting the later strength development of concrete. It is particularly suitable for small-scale preparation scenarios such as laboratories.

[0006] According to one aspect of the present invention, a device for preparing cement sol slurry is provided, comprising: A main frame, the main frame comprising a top plate, side plates and a bottom plate; A stirring container, the stirring container having an opening, the opening being provided with an openable and closable cover, the stirring container being reversibly arranged in the main frame; An immersion type ultrasonic vibration device, wherein the immersion type ultrasonic vibration device is disposed through the cover body; A stirring device is arranged in the stirring container at a side away from the immersion ultrasonic vibration device.

[0007] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the rated power density of the immersion ultrasonic vibration device is 50-500W / L (ie, the power acting on each liter of material is 50-500W) and the frequency is 14-41kHz.

[0008] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the preparation device further comprises an attached ultrasonic transducer, and the attached ultrasonic transducer is arranged at the bottom of the stirring container.

[0009] As a preferred solution of a cement sol slurry preparation device of the present invention, there are two side plates, which are respectively installed on both sides of the frame body, and the cover body is provided with pulleys on both sides facing the side plates, and the pulleys are in rolling contact with the side plates of the frame body.

[0010] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the preparation device further comprises an attached ultrasonic transducer arranged on the side wall of the stirring container, the power of the attached ultrasonic transducer is 0.5-5kW and the frequency is 14-41kHz.

[0011] As a preferred embodiment of a cement sol slurry preparation device of the present invention, the preparation device also includes a lifting device for lifting the cover body, the lifting device also includes a lifting motor and a lifting rod, one end of the lifting rod is connected to the cover body, and the other end of the lifting rod is connected to the lifting motor.

[0012] As a preferred solution of the cement sol slurry preparation device of the present invention, the lifting motor is located at the top of the main frame, and the other end of the lifting rod passes through the upper cover and the top plate of the main frame and is connected to the lifting motor.

[0013] As a preferred embodiment of a cement sol slurry preparation device of the present invention, the stirring device includes a stirring motor, the stirring motor is located outside the stirring container, a stirring shaft, one end of the stirring shaft is connected to the stirring motor, and the other end passes through the wall of the stirring container and extends into the cavity of the stirring container, and a stirring blade is arranged on the other end of the stirring shaft.

[0014] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the preparation device further comprises a control system, and the control system is electrically connected or electrically signal connected to the stirring motor, the lifting motor, the driving motor and the ultrasonic transducer.

[0015] As a preferred solution of the cement sol slurry preparation device of the present invention, the control system is arranged between the top plate of the main frame and the upper cover.

[0016] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the stirring container is flippably arranged in the main frame, specifically, both sides of the stirring container are rotatably connected to the side walls of the main frame through a rotating shaft.

[0017] As a preferred embodiment of a cement sol slurry preparation device of the present invention, the preparation device further comprises a flip handle for driving the stirring container to flip, wherein the handle is arranged on the outer side of the side plate and passes through the side plate and is connected to the rotating shaft.

[0018] As a preferred embodiment of the device for preparing cement sol slurry of the present invention, the stirring container further comprises a discharge port located on one side of the top thereof.

[0019] As a preferred embodiment of a cement sol slurry preparation device of the present invention, the stirring blades include at least two groups, an elastic scraper is installed at the lower part of the stirring blades near the bottom of the stirring container, the scraper is in close contact with the bottom of the container, each group of stirring blades is arranged along the radial direction of the stirring container and satisfies that the bottom area of ​​the stirring area after all the stirring blades in the group rotate one circle is not less than 90% of the bottom area of ​​the stirring container, and the immersion ultrasonic vibration device includes at least two, which are evenly arranged along the diameter direction of the cover body.

[0020] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the device further comprises a roller arranged at the bottom of the main frame.

[0021] As a preferred embodiment of the cement sol slurry preparation device of the present invention, the total power of the attached ultrasonic transducer is 0.5-5kW.

[0022] As a preferred embodiment of a cement sol slurry preparation device of the present invention, the immersion ultrasonic vibration device includes an ultrasonic vibration rod and a driving motor. The length of the ultrasonic vibration rod satisfies that when the cover is closed on the stirring container, the length of the rod extending into the cement slurry is not less than 1 / 2 of the height of the cement slurry.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The preparation device of the present invention can be well adapted to the preparation of cement sol slurry in small-scale scenarios such as laboratories with a container capacity of 20-200L by reasonably arranging the positions and quantities of various components. The preparation device of the present invention can be well adapted to the preparation of cement sol slurry in small-scale scenarios such as laboratories by reasonably arranging the positions and quantities of various components. The preparation device of the present invention can prepare cement sol slurry with excellent density on a small scale by cooperating with various components (such as a stirring device, an ultrasonic vibration device and an attached ultrasonic transducer). In particular, the free water content in the cement sol slurry can be significantly reduced. The cement sol slurry obtained based on the scheme of the present invention has a higher bonding strength after being mixed with aggregate, thereby significantly improving the strength of concrete.

[0024] 2. The strength of cement concrete prepared by the cement sol slurry prepared by the preparation device of the present invention is more than 10% higher than that of cement concrete prepared by the cement slurry produced by the conventional mixing process, and there will be no problem of concrete strength shrinkage in the later stage.

[0025] 3. The preparation device of the present invention can significantly improve the operational convenience in small-scale production scenarios such as laboratories by providing components such as rotating shafts, pulleys, and rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Structural schematic diagram of the cement sol slurry preparation device of the present invention Figure 2 Structural side view of the stirring container and the main frame of the preparation device of the present invention Figure 3 Structural schematic diagram of the stirring device in the preparation device of the present invention Among them, 1-main frame, 2-stirring container, 3-cover, 4-immersed ultrasonic vibration device, 401-vibration rod, 5-stirring device, 501-stirring blade, 6-attached ultrasonic transducer, 7-lifting device, 701-lifting rod, 8-control system, 9-discharging port, 10-roller, 11-pulley, 12-rotating shaft, 13-flip handle DETAILED DESCRIPTION

[0027] See also Figure 1-3In one specific embodiment of the present invention, a device for preparing cement sol slurry for laboratory use is provided, which comprises: A main frame 1, comprising a top plate, side plates and a bottom plate; A stirring container 2, wherein the stirring container has an opening, and a closable cover 3 is provided on the opening, and the volume of the stirring container is 100L; A lifting device 7, used for lifting the cover body 3, the lifting device 7 also includes a lifting motor and a lifting rod 701, one end of the lifting rod 701 is connected to the cover body 3, and the other end of the lifting rod 701 is connected to the lifting motor; Two immersion ultrasonic vibration devices 4, the immersion ultrasonic vibration device 4 includes an ultrasonic vibration rod 401 and a driving motor, the two ultrasonic vibration rods 401 are symmetrically arranged along the center of the cover, and the length of the ultrasonic vibration rod 401 satisfies that when the cover 3 is covered on the stirring container 2, the length of the rod extending into the cement slurry is 1 / 2 of the height of the cement slurry. In the process of preparing the cement slurry, the immersion ultrasonic vibration device 4 can directly transmit high-frequency vibration waves to the cement slurry, with the highest energy transmission efficiency, and the immersion ultrasonic vibration device can be raised after use, which is convenient for cleaning the stirring tank.

[0028] A stirring device 5, which is arranged in the stirring container 2 on a side away from the immersion ultrasonic vibration device 4, and includes a stirring motor and a stirring shaft arranged outside the stirring container, one end of the stirring shaft is connected to the stirring motor, and the other end penetrates the wall of the stirring container and extends into the cavity of the stirring container, and a stirring blade 501 is arranged on the other end of the stirring shaft, and the stirring blade 501 includes two groups, and there are two stirring blades 501 on the side away from the ultrasonic vibration rod 401, and a plastic or rubber elastic scraper is installed at the bottom thereof, and the scraper is in contact with the bottom of the stirring container to scrape up the cement deposited on the bottom of the container, so that it can better undergo a sol reaction and improve the formation effect of the sol, each group of stirring blades 501 is arranged along the radial direction of the stirring container and satisfies that the bottom area of ​​the stirring area after all the stirring blades in the group rotate one circle is 95% of the bottom area of ​​the stirring container, and there are three stirring blades 501 close to the side of the vibration rod 401, and a distance of 3 cm is maintained from the end of the ultrasonic vibration rod 401 to prevent collision and damage to components during the stirring process. During the preparation of cement slurry, the stirring device 5 can scrape up the cement slurry in the bottom area of ​​the stirring container to prevent the heavier cement particles in the cement slurry from settling to the bottom and reducing the ultrasonic stirring efficiency.

[0029] The attached ultrasonic transducer 6 is arranged at the bottom of the stirring container 2, with a total power range of 0.5-5kW and a frequency of 14-41kHz. In the process of preparing cement slurry, the attached ultrasonic transducer 6 can transmit high-frequency vibration waves through the outer wall of the stirring container to the cement slurry on the inner wall of the container, thereby compensating for the problem that the cement slurry near the inner wall of the container has weak ultrasonic intensity due to being far away from the immersion ultrasonic vibration device. When preparing cement sol slurry, water, polycarboxylate water-reducing agent powder and cement are added to the stirring container in a ratio of water: polycarboxylate water-reducing agent powder: cement = 0.5:0.001:1, and the cover is lowered. At this time, the ultrasonic vibration rod is immersed in the cement slurry, and the ultrasonic vibration device is started to vibrate at a power density of 100 W / L and a frequency of 20 kHz. The attached ultrasonic transducer is started and set to have a frequency of 20 kHz and a power of 2 kW to ultrasonically perform the cement slurry. The stirring device is started to stir the cement slurry at a speed of 10 r / min. At an ambient temperature of 25° C., ultrasonic vibration and stirring are carried out simultaneously for 10 minutes. After completion, cement sol slurry is obtained, and the stirring container 2 is turned over to pour out the cement sol slurry in the container for standby use.

[0030] The cement sol slurry prepared according to the embodiment is mixed and stirred in a ratio of cement sol slurry: sand: gravel = 1.5: 2.2: 3.8 to obtain cement sol slurry concrete. It has been determined that the compressive and flexural strengths of the concrete made of cement sol slurry are 32.6 MPa and 10.9 MPa at 1-28 days, which are 11.4% and 10.8% higher than the concrete of cement slurry (water: polycarboxylate water-reducing agent powder: cement = 0.5: 0.001: 1, stirred and mixed): sand: gravel = 1.5: 2.2: 3.8, and no strength shrinkage phenomenon or surface shrinkage cracks were found at 90 days.

[0031] In another specific embodiment of the present invention, see Figure 1 The preparation device also includes a control system 8, which is electrically connected to the stirring motor, the lifting motor, the driving motor and the attached ultrasonic transducer 6 or connected by electrical signals (such as WiFi, Bluetooth, 3G, 4G, 5G) to achieve remote control when preparing cement sol slurry.

[0032] In another specific embodiment of the present invention, see Figure 1 The preparation device also includes a discharge port 9 arranged at the top of the stirring container 2 to discharge the prepared cement sol slurry.

[0033] In another specific embodiment of the present invention, see Figure 1The preparation device also includes rollers arranged at the bottom of the main frame 1 to facilitate smooth movement of the preparation device.

[0034] In another specific embodiment of the present invention, see Figure 2 The preparation device also includes a flip handle 13 for driving the stirring container to flip. The flip handle 13 is arranged on the outside of the side plate and passes through the side plate and is connected to the rotating shaft so as to smoothly flip the stirring container 2 to discharge the cement sol slurry.

[0035] It should be noted that, according to the above embodiments of the present invention, those skilled in the art can fully realize the full scope of the independent claims and dependent rights of the present invention, and the implementation process and method are the same as the above embodiments; and the part not described in detail in the present invention belongs to the well-known technology in the field. However, the protection scope of the present invention is not limited to this, and any changes or substitutions that can be easily thought of by any person familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for preparing cement sol slurry, characterized in that: include: A main frame, the main frame comprising a top plate, side plates and a bottom plate; A stirring container, the stirring container having an opening, the opening being provided with an openable and closable cover, the stirring container being reversibly arranged in the main frame; An immersion type ultrasonic vibration device, wherein the immersion type ultrasonic vibration device is disposed through the cover body; A stirring device is arranged in the stirring container at a side away from the immersion ultrasonic vibration device.

2. The preparation device according to claim 1, characterized in that: The preparation device also includes an attached ultrasonic transducer, which is arranged at the bottom of the stirring container.

3. The preparation device according to claim 1, characterized in that: Pulleys are arranged on both sides of the cover body, and the pulleys are in rolling contact with the side plates of the frame body.

4. The preparation device according to claim 1, characterized in that: The preparation device also includes a lifting device for lifting the cover body, and the lifting device also includes a lifting motor and a lifting rod, one end of the lifting rod is connected to the cover body, and the other end of the lifting rod is connected to the lifting motor, the lifting motor is located at the top of the main frame, and the other end of the lifting rod passes through the upper cover and the top plate of the main frame and is connected to the lifting motor.

5. The preparation device according to claim 1, characterized in that: The stirring device includes a stirring motor, which is located outside the stirring container, a stirring shaft, one end of which is connected to the stirring motor and the other end of which penetrates the wall of the stirring container and extends into the cavity of the stirring container, and a stirring blade arranged on the other end of the stirring shaft.

6. The preparation device according to claim 5, characterized in that: The stirring blades include at least two groups, and an elastic scraper is installed at the lower part of the stirring blades near the bottom of the stirring container. The scraper is in close contact with the bottom of the container. Each group of stirring blades is arranged along the radial direction of the stirring container and satisfies that the bottom area of ​​the stirring area after all the stirring blades in the group rotate one circle is not less than 90% of the bottom area of ​​the stirring container. The immersion ultrasonic vibration device includes at least two, which are evenly arranged along the diameter direction of the cover body.

7. The preparation device according to claim 1, characterized in that: The preparation device also includes a control system, which is electrically connected or electrically signal-connected to the stirring motor, the lifting motor, the driving motor, and the ultrasonic transducer, and is disposed between the top plate of the main frame and the upper cover.

8. The preparation device according to any one of claims 1 to 7, characterized in that: The stirring container is flippably arranged in the main frame, specifically, both sides of the stirring container are rotatably connected to the side walls of the main frame through a rotating shaft. The preparation device also includes a flip handle for driving the stirring container to flip, and the handle is arranged on the outside of the side plate and passes through the side plate to be connected to the rotating shaft.

9. The preparation device according to any one of claims 1 to 7, characterized in that: The stirring container also includes a discharge port located on one side of the top thereof.

10. The preparation device according to any one of claims 1 to 7, characterized in that: The device also includes a roller disposed at the bottom of the main frame.

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