Environment-friendly low-alkali cement grinding aid stirring equipment

Abstract

The utility model discloses environment-friendly low-alkali cement grinding aid stirring equipment which comprises a stirring machine shell, an inner cavity is fixedly connected in the stirring machine shell, the top end of the inner cavity is in threaded connection with a first rotating shaft, a plurality of push type paddles are fixedly connected to the first rotating shaft in the vertical direction, and the first rotating shaft is in threaded connection with a second rotating shaft in the vertical direction. The top surface of the stirrer shell is fixedly connected with a motor I, and the output end of the motor I is fixedly connected with the rotating shaft I; a second rotating shaft is in threaded connection with the top end of the stirrer shell, a plurality of turbo type paddles are fixedly connected to the second rotating shaft in the vertical direction, a second motor is fixedly connected to the top face of the stirrer shell, and the output end of the second motor is fixedly connected with the second rotating shaft; liquid components are mixed with low shear force in the pre-stirring stage of the push-type paddle, the scrapers synchronously remove attachments on the wall of the cavity, and the turbo-type paddle rapidly crushes solid particles through high shear force and promotes uniform fusion of materials, so that the reaction activity of the grinding aid and the stability of a finished product are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of grinding aid production technology, and in particular to an environmentally friendly, low-alkali cement grinding aid mixing device. Background Technology

[0002] In traditional cement production, cement grinding aids enhance strength and fluidity by reducing interparticle adhesion, improving grinding efficiency, reducing energy consumption, and optimizing cement particle size distribution. Low-alkali formulations can inhibit alkali-aggregate reactions, reduce equipment corrosion, and are compatible with industrial solid waste, contributing to environmentally friendly production and achieving high-quality, low-carbon cement manufacturing. Early grinding aid mixing equipment mostly used conventional mechanical mixing methods, relying on high shear force or long-term stirring to achieve component dispersion.

[0003] A search revealed Chinese Patent Publication No. CN207591758U, which discloses a cement grinding aid batching and mixing device. The device includes a mixer housing and a mixing motor mounted on the top of the mixer housing. The mixing motor is fixed to the top of the mixer housing via a motor mounting bracket. The motor's main shaft is connected to a mixing shaft via a coupling. The end of the mixing shaft extends to the bottom of the inner cavity of the mixer housing. Two rotationally symmetrical mixing horizontal shafts are provided on the surface of the mixing shaft, with one end of each horizontal shaft rotatably connected to the surface of the mixing shaft. The other end of each horizontal shaft is rotatably connected to a limiting block located inside a limiting slide rail. A ring-shaped discharge platform is provided at the bottom of the inner cavity of the mixer housing. A discharge pipe is fixedly connected to the bottom end face of the mixer housing within the inner ring cavity of the discharge platform, and a shut-off valve is installed on the surface of the discharge pipe. This utility model has a reasonable structural design and improves the stirring efficiency. The patent has the advantage of expanding the stirring coverage and optimizing the material movement trajectory through the linkage design of the rotationally symmetrical stirring horizontal axis in the limiting slide rail. However, it still lacks a staged mixing and impurity control design, which may lead to uneven material mixing, reduced grinding aid activity, and problems such as residual lumps and impurities causing fluctuations in the quality of the finished product. Utility Model Content

[0004] The purpose of this invention is to provide an environmentally friendly, low-alkali cement grinding aid mixing device to solve problems such as uneven material mixing, reduced grinding aid activity, and fluctuations in finished product quality caused by residual lumps and impurities.

[0005] To achieve the above objectives, an environmentally friendly, low-alkali cement grinding aid mixing device is provided, comprising a mixer housing, an inner chamber fixedly connected inside the mixer housing, a rotating shaft threadedly connected to the top of the inner chamber, a plurality of propeller blades fixedly connected to the rotating shaft in the vertical direction, and a motor fixedly connected to the top surface of the mixer housing, the output end of the motor being fixedly connected to the rotating shaft.

[0006] The top of the mixer housing is threaded with a second rotating shaft. Several turbine blades are fixedly connected to the second rotating shaft in the vertical direction. A second motor is fixedly connected to the top surface of the mixer housing. The output end of the second motor is fixedly connected to the second rotating shaft.

[0007] According to the aforementioned environmentally friendly low-alkali cement grinding aid mixing equipment, scrapers are fixedly connected between the ends of several of the propulsion blades. The scrapers are in contact with the inner cavity and are rotatable.

[0008] According to the aforementioned environmentally friendly low-alkali cement grinding aid mixing equipment, a feed inlet is provided at the top left end of the mixer shell, the feed inlet extending into the inner cavity, and a feed inlet is provided at the right end of the mixer shell.

[0009] According to the aforementioned environmentally friendly low-alkali cement grinding aid mixing equipment, a discharge pipe is fixedly connected to the lower end of the inner chamber, and a discharge port is fixedly connected to the lower end of the discharge pipe. A valve is provided at the discharge port. A discharge pipe is connected to the lower end of the mixer shell, and a discharge port is fixedly connected to the lower end of the discharge pipe. A valve is provided at the discharge port.

[0010] According to the aforementioned environmentally friendly low-alkali cement grinding aid mixing equipment, the discharge pipe one is equipped with a filter screen one, and the discharge pipe two is equipped with a filter screen two.

[0011] According to the aforementioned environmentally friendly low-alkali cement grinding aid mixing equipment, the mixer housing is fixedly connected to two sides with fixed rods, and the ends of the fixed rods are fixedly connected to a support platform.

[0012] The above-mentioned solution has the following beneficial effects:

[0013] 1. This environmentally friendly, low-alkali cement grinding aid mixing equipment is equipped with propeller blades in the inner chamber and main mixing zone to mix liquid components with low shear force during the pre-mixing stage, scrapers to remove adhering substances on the chamber wall at the same time, and turbine blades to quickly crush solid particles with high shear force and promote uniform material fusion, which significantly improves the reactivity of the grinding aid and the stability of the finished product.

[0014] 2. This environmentally friendly, low-alkali cement grinding aid mixing equipment uses a dual-stage filter screen to intercept impurities in the premixing stage and the final product during the discharge stage. This ensures the purity of the grinding aid and avoids the risk of screen clogging, meeting the core requirements of environmentally friendly, low-alkali processes for clean production and efficient resource utilization.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a schematic diagram of the overall structure of an environmentally friendly, low-alkali cement grinding aid mixing device according to the present invention.

[0018] Figure 2 This is an overall sectional view of an environmentally friendly, low-alkali cement grinding aid mixing device according to the present invention.

[0019] Figure 3 This is a front view of an environmentally friendly, low-alkali cement grinding aid mixing device according to the present invention.

[0020] Figure 4 This is a front sectional view of an environmentally friendly, low-alkali cement grinding aid mixing device according to the present invention.

[0021] Legend:

[0022] 1. Motor 1; 2. Rotating shaft 1; 3. Propeller blade; 4. Mixer housing; 5. Discharge port 1; 6. Valve 1; 7. Motor 2; 8. Rotating shaft 2; 9. Discharge pipe 1; 10. Scraper; 11. Inner chamber; 12. Turbine blade; 13. Feed inlet 1; 14. Fixing rod; 15. Discharge pipe 2; 16. Valve 2; 17. Feed inlet 2; 18. Support platform; 19. Discharge port 2; 20. Filter screen 1; 21. Filter screen 2. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4 This utility model embodiment provides an environmentally friendly, low-alkali cement grinding aid mixing device, which includes a mixer housing 4, an inner chamber 11 fixedly connected inside the mixer housing 4, a rotating shaft 2 threadedly connected to the top of the inner chamber 11, a plurality of propeller blades 3 fixedly connected to the rotating shaft 2 in the vertical direction, and a motor 1 fixedly connected to the top surface of the mixer housing 4, the output end of the motor 1 being fixedly connected to the rotating shaft 2.

[0025] The top of the mixer housing 4 is threaded with a rotating shaft 2 8. Several turbine blades 12 are fixedly connected to the rotating shaft 2 8 in the vertical direction. A motor 2 7 is fixedly connected to the top surface of the mixer housing 4. The output end of the motor 2 7 is fixedly connected to the rotating shaft 2 8. The motor 1 1 drives the rotating shaft 2 2 to drive the propeller blades 3 to rotate, forming a low-shear force mixed liquid component. The motor 2 7 drives the rotating shaft 2 8 to drive the turbine blades 12 to rotate, generating radial high shear force to quickly break up solid particles and promote the uniform fusion of materials.

[0026] A scraper 10 is fixedly connected between the ends of several propeller blades 3. The scraper 10 fits against the inner chamber 11 and can rotate. When the scraper 10 rotates synchronously with the propeller blades 3, it continuously scrapes off the material attached to the wall of the inner chamber 11, preventing agglomeration and improving heat transfer efficiency, while maintaining the integrity of the stirring area space.

[0027] The top left end of the mixer housing 4 is provided with a feed inlet 13, which extends into the inner chamber 11. The right end of the mixer housing 4 is provided with a feed inlet 2 17. The feed inlet 13 is used to inject powder raw materials, and the feed inlet 2 17 is dedicated to the input of liquid additives. The dual-channel design enables precise feeding in stages.

[0028] The lower end of the inner chamber 11 is fixedly connected to the discharge pipe 1 9, the lower end of the discharge pipe 1 9 is fixedly connected to the discharge port 1 5, and the discharge port 1 5 is equipped with valve 1 6. The lower end of the mixer shell 4 is connected to the discharge pipe 2 15, the lower end of the discharge pipe 2 15 is fixedly connected to the discharge port 2 19, and the discharge port 2 19 is equipped with valve 2 16. The discharge port 1 5 is used to discharge the initial mixed material to the next process, and the discharge port 2 19 processes the final product. The two valves 1 6 and 2 16 are independently controlled to achieve graded discharge, and together with the drop of the discharge pipe 1 9 and the discharge pipe 2 15, a gravity discharge structure is formed.

[0029] The discharge pipe 19 is equipped with a filter screen 20, and the discharge pipe 21 is equipped with a filter screen 21. The filter screen 20 is located in the discharge pipe 19 to intercept undispersed clumps, and the filter screen 21 is set in the discharge pipe 215 to screen out particles with excessive particle size, forming a graded quality control node.

[0030] The mixer housing 4 is fixedly connected to two sides with fixed rods 14, and the ends of the fixed rods 14 are fixedly connected to the support platform 18. The fixed rods 14 and the support platform 18 form a three-point support system, which effectively counteracts the compound torque generated by the operation of the two motors and ensures the overall stability of the equipment under high-speed mixing conditions.

[0031] Working principle: During use, the operator first adds the agitator into the inner chamber 11 through the feed inlet 13 for pre-mixing. Then, motor 1 is turned on, driving the rotating shaft 2. The propeller blades 3 on the rotating shaft 2, with their low shear force during mixing, are suitable for liquid mixing. The scraper 10 effectively scrapes off any residue adhering to the walls, ensuring thorough mixing. After pre-mixing, valve 6 is opened via an electrical signal, allowing the agitator to be added into the mixer housing 4 through the discharge pipe 9 and discharge inlet 5. The remaining grinding aid to be mixed is then added into the mixer housing 4. Motor 7 is then turned on, driving the rotating shaft 8 to rotate. The turbine blades 12 on the second chamber begin to rotate. The high shear force generated during stirring is suitable for dispersing solid particles and ensuring thorough stirring. After stirring is complete, valve 16 is opened, and the stirring agent flows out through discharge pipe 15 and discharge port 19. Filter screens 20 and 21 can filter out impurities in the raw materials during the discharge process. Through the synergistic effect of different blades in the two chambers, the mixing efficiency and dispersion uniformity are significantly improved, while reducing stirring dead zones. The chamber design, which prevents interference between the two chambers, ensures product purity and uniform composition through pre-stirring and final stirring. It is particularly suitable for fine industrial scenarios such as low-alkali grinding aids.

[0032] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An environmentally friendly low-alkali cement grinding aid mixing device, comprising: The mixer housing (4) is characterized in that an inner cavity (11) is fixedly connected inside the mixer housing (4), a rotating shaft (2) is threadedly connected to the top of the inner cavity (11), a plurality of propulsion blades (3) are fixedly connected to the rotating shaft (2) in the vertical direction, a motor (1) is fixedly connected to the top surface of the mixer housing (4), and the output end of the motor (1) is fixedly connected to the rotating shaft (2); The top of the mixer housing (4) is threaded with a rotating shaft (8), and a number of turbine blades (12) are fixedly connected to the rotating shaft (8) in the vertical direction. A motor (7) is fixedly connected to the top surface of the mixer housing (4), and the output end of the motor (7) is fixedly connected to the rotating shaft (8).

2. The environmentally friendly low-alkali cement grinding aid stirring device according to claim 1, characterized in that, A scraper (10) is fixedly connected between the ends of several of the propulsion blades (3). The scraper (10) is in contact with the inner cavity (11) and is rotatable.

3. The environmentally friendly, low-alkali cement grinding aid mixing equipment according to claim 1, characterized in that, The mixer housing (4) has a feed inlet (13) at the top left end, which extends into the inner cavity (11). The mixer housing (4) has a feed inlet (17) at the right end.

4. The environmentally friendly, low-alkali cement grinding aid mixing equipment according to claim 1, characterized in that, The lower end of the inner chamber (11) is fixedly connected to a discharge pipe (9), the lower end of the discharge pipe (9) is fixedly connected to a discharge port (5), the discharge port (5) is provided with a valve (6), the lower end of the mixer shell (4) is connected to a discharge pipe (15), the lower end of the discharge pipe (15) is fixedly connected to a discharge port (19), the discharge port (19) is provided with a valve (16).

5. The environmentally friendly, low-alkali cement grinding aid mixing equipment according to claim 4, characterized in that, The discharge pipe 1 (9) is equipped with a filter screen 1 (20), and the discharge pipe 2 (15) is equipped with a filter screen 2 (21).

6. The environmentally friendly, low-alkali cement grinding aid mixing equipment according to claim 1, characterized in that, The mixer housing (4) is fixedly connected to two sides by fixing rods (14), and a support platform (18) is fixedly connected to the end of the fixing rods (14).

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