Interventional grouting dry material premixing device and method

Abstract

The invention discloses an intrusive grouting dry material premixing device and method, which can effectively avoid slurry caking, improve the uniformity of slurry, and improve the construction efficiency and the performance of grouting materials. The technical scheme comprises a mixing device, a driving device, a control system and a bracket, a mixing device is arranged above the bracket, and an adjustable spiral conveying device is arranged above the mixing device; the stirring device is arranged below the mixing device, and the driving device and the mixing device are coaxially arranged; the small material batching machine is composed of a batching bin, a weighing sensor and an automatic feeding device, a plurality of stock bins and a pre-stirring bin are arranged in the batching bin, the automatic feeding device is arranged between the stock bins and the pre-stirring bin, and the weighing sensor is arranged at the bottoms of the stock bins; a mixed material conveying device is arranged on one side of the pre-stirring bin; the weighing sensor, the automatic feeding device, the driving device and the stirring device are all connected with the control system.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting equipment, and particularly relates to an interventional grouting dry material premixing device and method. Background Technique

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] Additives in grouting materials can usually improve the anti-dispersion property of the slurry, adjust the rheological properties, control the hydration rate, enhance the stability and improve the water retention property, thereby improving the construction performance and quality of the slurry in complex environments. However, the specific surface area of the additives is relatively large and the dosage is relatively small, resulting in poor dispersion in the slurry and difficult to be uniformly mixed with cement powder.

[0004] Existing mixing equipment mostly adopts traditional mixing methods, adding additives, powder and water into the mixing tank for mixing. However, due to the small particles and large specific surface area of the additives, their dispersion is poor, and they are prone to form lumps during the mixing process of cement powder and water. This lump phenomenon not only reduces the fluidity and workability of the slurry, especially when the dosage of the additives is small, the additives cannot be fully mixed with the grouting dry powder, and the formed slurry shows poor uniformity. Summary of the Invention

[0005] Aiming at the above problems, the present invention provides an interventional grouting dry material premixing device and method, which can effectively premix the additives with the grouting dry powder, thereby avoiding slurry lumping, improving the uniformity of the slurry, and enhancing the construction efficiency and the performance of the grouting materials.

[0006] To achieve the above object, the present invention is realized by the following technical solutions:

[0007] In a first aspect, the present invention provides an interventional grouting dry material premixing device, comprising: a small material batching machine, a mixing device, a driving device, an adjustable screw conveyor device, a stirring device, a control system and a bracket; the mixing device is arranged above the bracket, the small material batching machine is arranged above the driving device, and the adjustable screw conveyor device is arranged above the mixing device; the stirring device is arranged below the mixing device, and the driving device is coaxially arranged with the mixing device to provide power for the mixing device;

[0008] The small material batching machine consists of a batching bin, a weighing sensor and an automatic feeding device. A plurality of bins and a pre-stirring bin are arranged in the batching bin. The automatic feeding device is arranged between the bin and the pre-stirring bin, and the weighing sensor is arranged at the bottom of the bin; a mixing and conveying device is arranged on one side of the pre-stirring bin;

[0009] The weighing sensor, the automatic feeding device, the adjustable screw conveyor, the driving device and the stirring device are all connected to the control system.

[0010] Furthermore, a pre-stirring unit is arranged in the pre-stirring bin for preliminarily mixing the admixture and a small amount of grouting dry powder.

[0011] Furthermore, the mixing device is composed of a mixing box and a stirring and mixing mechanism. A discharge port is arranged at the bottom of the mixing box; the stirring and mixing mechanism is composed of a stirring shaft and spiral fan blades fixedly arranged on the stirring shaft. Both ends of the stirring shaft are installed on two opposite side walls of the mixing box through bearings, and one end of the stirring shaft is connected to the driving device through a coupling.

[0012] Furthermore, a water injection device and a material viscosity detection device are arranged in the stirring device. The material viscosity detection device and the water adding device are both connected to the control system. The stirring device is equipped with a two-speed motor, and the two-speed motor is connected to the control system; the stirring speed can be adjusted according to the change of the material viscosity.

[0013] Furthermore, the adjustable screw conveyor is composed of a screw conveyor and a lifting device. The lifting device is connected to the control system and can automatically adjust the height and inclination angle of the screw conveyor for smoothly conveying the material to the mixing device.

[0014] Furthermore, the control system adopts PLC control technology for setting and controlling the working state of the premixing device.

[0015] In a second aspect, the present invention also provides an efficient and uniform premixing method for intervention grouting dry materials, including:

[0016] S1. Adding different admixtures and grouting dry powder into different bins, and setting multiple groups of feeding programs through the control system. The addition amount of each admixture is calculated and adjusted by the control system; the control system adjusts the feeding rate and sequence of the admixture through the automatic feeding device;

[0017] S2. Preliminarily mixing the admixture and a small amount of grouting dry powder through the pre-stirring unit in the batching machine;

[0018] S3. Conveying the preliminarily mixed admixture and grouting dry powder to the mixing box through the small material batching machine; at the same time, conveying the cement dry powder to the mixing box through the adjustable screw conveyor;

[0019] S4. Conveying the evenly mixed cement dry powder, admixture and grouting dry powder to the stirring device through the discharge port, and adjusting the mixer parameters in real time according to the material characteristics through the control system and controlling the water injection device to inject water;

[0020] S4. The control system detects the viscosity of the slurry through the material viscosity detection device and adjusts the working state of the water addition device according to the viscosity of the slurry, ensuring that the cement dry powder, admixture, and grouting dry powder are fully mixed and avoiding any unevenness or particle caking in the slurry.

[0021] S5. After the stirring process is completed, the slurry is transported to a storage tank or other construction equipment.

[0022] Furthermore, in S3, the control system controls the adjusted conveying speed of the lifting device according to the backlog situation of the cement dry powder, ensuring the stable conveyance of the cement dry powder to the stirring device.

[0023] Furthermore, in S3, first stir at a high speed for a set time to initially mix the admixture with the cement dry powder, and then stir at a low speed for a set time, and extend the stirring time according to the actual situation to ensure the complete dispersion of the admixture.

[0024] Furthermore, in S4, the control system automatically feedback-adjusts the water volume and stirring time according to the slurry viscosity.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are:

[0026] The small material batching machine of the present invention monitors the weight of the admixture through a weighing sensor to ensure that the feeding error is controllable, and the control system can calculate and adjust the admixture addition amount, adjust the feeding rate and sequence, and automatically adjust the admixture feeding amount according to different formulas to achieve precise batching; the pre-stirring unit first initially mixes the admixture with a small amount of grouting dry powder to ensure the uniform distribution of the admixture; the stirring and mixing mechanism of the mixing device further mixes; during the stirring process, first stir at a high speed for initial mixing, and then stir at a low speed to ensure the complete dispersion of the admixture, and the control system automatically adjusts the stirring speed and time according to the uniformity of the slurry to ensure uniform mixing.

[0027] The present invention can automatically adjust the height and inclination angle of the screw conveyor through the lifting device of the adjustable screw conveyor device, control the conveying speed according to the backlog situation of the cement dry powder, avoid material backlog, and ensure the stable conveyance of the cement dry powder; the material viscosity detection device of the stirring device is connected to the control system, and the working state of the water addition device is adjusted according to the slurry viscosity to ensure the full mixing of the cement dry powder, admixture, and grouting dry powder, and avoid slurry unevenness or particle caking; the support below the stirring device adopts a on-site welding structure to ensure the stability of the equipment; the control system monitors various indicators of the equipment in real time and automatically adjusts the parameters according to the monitoring results to ensure that the material ratio and slurry quality meet the standards. Description of the Drawings

[0028] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0029] Figure 1 It is a schematic structural diagram of the premixing device for grouting dry material of the present invention.

[0030] In the figure: 1, batching bin; 2, pre-stirring bin; 3, mixing and conveying device; 4, adjustable screw conveyor; 5, mixing tank; 6, stirring shaft; 7, driving device; 8, discharging port; 9, stirring device; 10, support. Detailed implementation manners

[0031] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0033] Embodiment 1

[0034] This embodiment provides an interventional grouting dry material premixing device, as Figure 1 shown, including: a small material batching machine, a mixing device, a driving device 7, an adjustable screw conveyor 4, a stirring device 9, a control system and a support 10; a mixing device is arranged above the support 10, a small material batching machine is arranged above the driving device 7, and an adjustable screw conveyor 4 is arranged above the mixing device; the stirring device 9 is arranged below the mixing device, and the driving device 7 is coaxially arranged with the mixing device to provide power for the mixing device;

[0035] The small material batching machine is composed of a batching bin 1, a weighing sensor and an automatic feeding device. A plurality of bins and a pre-stirring bin 2 are arranged in the batching bin 1. The automatic feeding device is arranged between the bins and the pre-stirring bin 2. The weighing sensor is arranged at the bottom of the bin to monitor the weight of each admixture through the weighing sensor to ensure that the feeding error is controlled within ±20 g; a mixing and conveying device 3 is arranged on one side of the pre-stirring bin 2;

[0036] The weighing sensor, the automatic feeding device, the adjustable screw conveyor 4, the driving device 7 and the stirring device 9 are all connected to the control system.

[0037] A pre-stirring unit is arranged in the pre-stirring bin 2 for preliminarily mixing the admixture with a small amount of grouting dry powder; the function of the pre-stirring unit is to preliminarily mix the admixture with a small amount of grouting dry powder to ensure the uniform distribution of the admixture; after the pre-stirring is completed, it enters the mixing device through the conveying device.

[0038] The mixing device is composed of a mixing box 5 and a stirring and mixing mechanism. A discharge port 8 is arranged at the bottom of the mixing box 5; the stirring and mixing mechanism is composed of a stirring shaft 6 and spiral fan blades fixedly arranged on the stirring shaft 6. The two ends of the stirring shaft 6 are installed on two opposite side walls of the mixing box 5 through bearings, and one end of the stirring shaft 6 is connected to the driving device 7 through a coupling;

[0039] An injection device and a material viscosity detection device are arranged in the stirring device 9. The material viscosity detection device and the water adding device are both connected to the control system. The stirring device 9 is equipped with a two-speed motor, and the two-speed motor is connected to the control system; the stirring speed can be adjusted according to the change of the material viscosity. During the stirring process, the rotation speed and stirring time of the stirring device 9 are monitored in real time by the control system and automatically adjusted according to the uniformity of the slurry. A support 10 is also arranged below the stirring device 9, and the support 10 adopts a site-welded structure to ensure the stability of the equipment.

[0040] The adjustable screw conveyor 4 is composed of a screw conveyor and a lifting device. The lifting device is connected to the control system and can automatically adjust the height and inclination angle of the screw conveyor, which is used to smoothly convey the material to the mixing device, and can control the flow rate of the material to avoid the phenomenon of material backlog caused by too low conveying angle.

[0041] The control system adopts PLC control technology to set and control the working state of the premixing device.

[0042] Embodiment 2

[0043] This embodiment provides an efficient and uniform premixing method for interventional grouting dry materials, including:

[0044] S1. Add different admixtures and grouting dry powder into different bins, and set multiple feeding programs through the control system. The addition amount of each admixture is calculated and adjusted by the control system; the control system adjusts the feeding rate and sequence of the admixture through the automatic feeding device; if the ratio needs to be adjusted, the control system can automatically adjust the addition amount of the admixture according to different formulas;

[0045] S2. The admixture and a small amount of grouting dry powder are preliminarily mixed by the pre-stirring unit in the batching machine;

[0046] S3. The preliminarily mixed admixture and grouting dry powder are conveyed to the mixing tank 5 by the small material batching machine; meanwhile, the cement dry powder is conveyed to the mixing tank 5 by the adjustable screw conveyor device 4;

[0047] S4. The evenly mixed cement dry powder, admixture and grouting dry powder are conveyed to the stirring device 9 through the discharge port 8. The control system adjusts the mixer parameters in real time according to the material characteristics and controls the water injection device to inject water;

[0048] S4. The control system detects the viscosity of the slurry through the material viscosity detection device and adjusts the working state of the water adding device according to the viscosity of the slurry; ensure that the cement dry powder, admixture and grouting dry powder are completely mixed to avoid any uneven phenomenon or particle agglomeration in the slurry;

[0049] S5. After the stirring process is completed, the slurry is conveyed to the storage tank or other construction equipment.

[0050] In S3, the conveying speed of the lifting device is adjusted by the control system according to the backlog situation of the cement dry powder; ensure that the cement dry powder is stably conveyed to the stirring device 9.

[0051] In S3, first stir at a high speed for a set time to preliminarily mix the admixture and the cement dry powder, and then stir at a low speed for a set time. Extend the stirring time according to the actual situation to ensure that the admixture is completely dispersed.

[0052] In S4, the control system will automatically feedback and adjust the water volume and stirring time according to the slurry viscosity.

[0053] During the whole material flow process, the control system will monitor various indicators of the equipment in real time, including the material flow speed, slurry viscosity, stirring time, water addition amount and material addition amount. According to the monitoring results, the system will automatically adjust the parameters to ensure that the material ratio and slurry quality always meet the standards.

[0054] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. An interventional grouting dry material premixing device, characterized in that, It includes: a small material batching machine, a mixing device, a driving device, an adjustable screw conveyor device, a stirring device, a control system and a bracket; a mixing device is arranged above the bracket, a small material batching machine is arranged above the driving device, and an adjustable screw conveyor device is arranged above the mixing device; the stirring device is arranged below the mixing device, and the driving device is coaxially arranged with the mixing device to provide power for the mixing device; the small material batching machine consists of a batching bin, a weighing sensor and an automatic feeding device, multiple bins and a pre-stirring bin are arranged in the batching bin, the automatic feeding device is arranged between the bins and the pre-stirring bin, and the weighing sensor is arranged at the bottom of the bins; a mixing and conveying device is arranged on one side of the pre-stirring bin; the weighing sensor, the automatic feeding device, the adjustable screw conveyor device, the driving device and the stirring device are all connected to the control system.

2. The intervention type grouting dry material premixing device according to claim 1, wherein, A pre-stirring unit is arranged in the pre-stirring bin for preliminarily mixing the admixture and a small amount of grouting dry powder.

3. The intervention grouting dry material premixing device according to claim 1, characterized in that, The mixing device consists of a mixing box and a stirring and mixing mechanism, and a blanking port is arranged at the bottom of the mixing box; the stirring and mixing mechanism consists of a stirring shaft and spiral fan blades fixedly arranged on the stirring shaft, and both ends of the stirring shaft are installed on two opposite side walls of the mixing box through bearings, and one end of the stirring shaft is connected to the driving device through a coupling.

4. The intervention grouting dry material premixing device according to claim 1, characterized in that, A water injection device and a material viscosity detection device are arranged in the stirring device, both the material viscosity detection device and the water adding device are connected to the control system, the stirring device is equipped with a two-speed motor, and the two-speed motor is connected to the control system; the stirring speed can be adjusted according to the change of the material viscosity.

5. An in-situ grouting dry material premixing device according to claim 1, characterized in that, The adjustable screw conveyor device consists of a screw conveyor and a lifting device, the lifting device is connected to the control system, and can automatically adjust the height and inclination angle of the screw conveyor to smoothly convey the material into the mixing device.

6. The intervention grouting dry material premixing device according to claim 1, characterized in that, The control system adopts PLC control technology to set and control the working state of the premixing device.

7. A premixing method for an intervention grouting dry material premixing device according to any one of claims 1-6, characterized in that, It includes: S1. Add different admixtures and grouting dry powder into different bins, and set multiple feeding programs through the control system. The addition amount of each admixture is calculated and adjusted by the control system; the control system adjusts the feeding rate and sequence of the admixture through the automatic feeding device; S2. Preliminarily mix the admixture and a small amount of grouting dry powder through the pre-stirring unit in the batching machine; S3. Convey the preliminarily mixed admixture and grouting dry powder to the mixing box through the small material batching machine; at the same time, convey the cement dry powder to the mixing box through the adjustable screw conveyor device; S4. Convey the evenly mixed cement dry powder, admixture and grouting dry powder to the stirring device through the blanking port, adjust the mixer parameters in real time according to the material characteristics through the control system, and control the water injection device to inject water; S4. The control system detects the viscosity of the slurry through the material viscosity detection device and adjusts the working state of the water addition device according to the viscosity of the slurry, ensuring that the cement dry powder, admixture and grouting dry powder are fully mixed and avoiding any unevenness or particle caking in the slurry. S5. After the stirring process is completed, the slurry is transported to the storage tank or other construction equipment.

8. The premixing method of an interventional grouting dry material premixing device according to claim 7, characterized in that, In S3, the control system controls the adjusted conveying speed of the lifting device according to the backlog of the cement dry powder, ensuring the stable conveyance of the cement dry powder to the stirring device.

9. The premixing method of an interventional grouting dry material premixing device according to claim 7, characterized in that In S3, first stir at a high speed for a set duration to initially mix the admixture with the cement dry powder, and then stir at a low speed for a set duration, and extend the stirring time according to the actual situation to ensure the complete dispersion of the admixture.

10. The premixing method of an intervention grouting dry material premixing device according to claim 7, characterized in that, In S4, the control system automatically feedback-adjusts the water volume and stirring time according to the slurry viscosity.

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