Premixing device for stirring concrete surface hardening agent and preparation process of premixing device
By introducing a magnetic induction shaft and a worm gear reducer-driven mixer into the mixing device, combined with inner and outer ring spiral mixing blades and an ultrasonic generator, the problem of low mixing efficiency in traditional mixing machinery is solved, and rapid and uniform mixing of concrete surface hardener is achieved.
Patent Information
- Application Number
- CN202410515993.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-10-28
AI Technical Summary
In existing technologies, traditional mixing machinery is inefficient in the mixing process of concrete surface hardeners, making it difficult to achieve rapid and uniform mixing.
A premixing device for mixing concrete surface hardener is adopted, including a mixing chamber, a sealed shaft, a magnetic induction rotating shaft, a permanent magnet, an electromagnet-driven rotating shaft, and a worm gear reducer. The agitator is driven to rotate at high speed by electromagnetic force, and combined with inner and outer ring spiral mixing blades, an ultrasonic generator, and a heat-conducting cavity, the rapid fusion of solutes and the dispersion of macromolecular suspensions are achieved.
It improves the mixing efficiency and uniformity of concrete surface hardener, ensuring that the solute quickly dissolves into the solution, and enhancing the uniformity and durability of the mixture.
Smart Images
Figure CN120838253A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of surface hardener mixing and preparation technology, and in particular to a premixing device for mixing concrete surface hardeners and its preparation process. Background Technology
[0002] Chinese Patent Publication No. (CN115108754B) discloses a concrete surface strengthening and hardening agent and its preparation method, belonging to the technical field of concrete admixtures. The concrete surface strengthening and hardening agent comprises component A and component B. Component A, by weight, includes 30-60 parts of silicate solution, 40-70 parts of organosilicon solution, 1-3 parts of emulsifier, and 0.01-0.05 parts of penetrant. Component B, by weight, includes 1-2 parts of nano-crystallizing agent and 3-5 parts of catalyst. The concrete surface strengthening and hardening agent has strong penetrating power and stable, dense crystalline products, while also possessing the stability and durability of inorganic materials and the hydrophobic properties of organic materials. When sprayed onto the concrete surface, it can significantly improve the density and wear resistance of concrete, achieving surface strengthening and hardening effects.
[0003] However, the traditional general-purpose mixing machinery it uses requires a relatively long mixing time to achieve the required uniformity of the mixture, which is not conducive to improving efficiency. Summary of the Invention
[0004] The technical problem to be solved by the present invention is: in order to overcome the problems mentioned above, a premixing device for mixing concrete surface hardener and its preparation process are provided, which solves the above problems.
[0005] The technical problem solved by this invention is achieved through the following technical solution:
[0006] A premixing device and its preparation process for mixing a concrete surface hardener, including a mixing chamber arranged on the structural frame of the premixing device, which is used to accommodate the solution solute for preparing the concrete surface hardener. A hollow and unidirectionally penetrating sealing shaft is fixedly arranged in the mixing chamber. At least two bearings are arranged outside the sealing shaft, and a stirrer is rotatably sleeved outside the sealing shaft. The stirrer includes a magnetic induction rotating shaft sleeved on the bearings, a support rod fixed outside the magnetic induction rotating shaft, and an outer ring spiral stirring blade welded and fixed on the support rod. Permanent magnets are fixedly arranged at intervals in the inner wall of the magnetic induction rotating shaft in a ring shape. The electromagnet-driven rotating shaft penetrates into the sealing shaft from the outside and forms a coupling with the permanent magnets through electromagnetic force. When the electromagnet-driven rotating shaft rotates under the drive of the worm and gear reducer, the stirrer can rotate and stir in the mixing chamber. The drive motor and the worm and gear reducer supporting the drive motor are fixed on the structural frame of the premixing device, and the output shaft of the worm and gear reducer is coaxially connected with the electromagnet-driven rotating shaft through a flexible coupling;
[0007] A solid material feeding hopper for feeding the solute and a liquid material feeding hopper for feeding the solution are arranged on the mixing chamber;
[0008] An electrical control cabinet supporting the drive motor and the electromagnet-driven rotating shaft is also fixedly arranged on the structural frame of the premixing device.
[0009] In one embodiment, several support rods are also fixedly arranged at intervals on the stirrer for fixing the inner ring spiral stirring blade. The spiral diameter of the inner ring spiral stirring blade is smaller than that of the outer ring spiral stirring blade, and the spiral direction of the inner ring spiral stirring blade is opposite to that of the outer ring spiral stirring blade. After the stirrer rotates, the hardener solution located outside and far from the magnetic induction rotating shaft will be stirred in one direction under the action of the outer ring spiral stirring blade, while the inner ring spiral stirring blade will stir the hardener solution close to the magnetic induction rotating shaft in the opposite direction, thereby forming an internal and external reflux circulation of the hardener solution, which is beneficial to improving the mixing efficiency and the homogenization degree of the solution after mixing.
[0010] In one embodiment, a shearing chamber is arranged under the solid material feeding hopper. Two mutually shearing serrated disc shearing rollers are rotatably arranged in the shearing chamber to crush the solid mixture, preventing agglomerated materials from falling into the mixing chamber and affecting the mixing quality. The serrated disc shearing rollers are driven by a motor.
[0011] In one embodiment, a sprocket is keyed to the outer end of the shaft of the sawtooth shearing roller and the output shaft of the worm gear reducer, and a synchronous chain is provided between the sprockets. A meshing spur gear is keyed to the other end of the two sawtooth shearing rollers. In this way, the sawtooth shearing rollers can rotate and shear each other under the action of the synchronous chain, spur gear and sprocket as transmission components, without the need to install a separate matching drive motor, which is simpler and more efficient.
[0012] In one embodiment, to improve safety and prevent material from splashing during feeding, a dispersion cover is welded and fixed inside the solid material feeding hopper. The dispersion cover is shaped like a "roof" and is located directly above the overlapping part of the saw blade shearing roller. This effectively prevents hand intrusion and avoids injury caused by splashing particles.
[0013] In one embodiment, an ultrasonic generator is fixedly mounted on the premixing device frame, and an ultrasonic rod, as an accessory of the ultrasonic generator, extends through the stirring chamber into its inner abdomen. The axis of the ultrasonic rod is parallel to the axis of the stirrer. Since the large molecular suspension (emulsifier, penetrant) is concentrated in the abdomen of the stirring chamber, it will flow back under the stirring action of the stirrer. After passing through the ultrasonic rod, it will be broken and dispersed under the action of ultrasound, thereby causing the large molecular suspension to separate from the large clump structure into small clumps and merge more quickly into the emulsifier and penetrant. This is beneficial to improve the preparation efficiency of mixing and improve the uniformity of mixing.
[0014] In one embodiment, a heat-conducting jacket cavity is also provided outside the stirring chamber, as shown in the figure. From the side, the heat-conducting jacket cavity is a U-shaped jacket structure. Heat-conducting oil is introduced into the heat-conducting jacket cavity to conduct heat to the stirred object in the stirring chamber, which helps to improve the dissolution efficiency of the solution. In addition, maintaining a stable temperature facilitates the dissolution of solutes of a specified size. The encircling heat-conducting jacket cavity design makes the heating more uniform, avoids local overheating, and has a better heat preservation effect.
[0015] In one embodiment, a graphene oxide coating is applied to the inner surface of the heat-conducting clamp cavity and the inner surface of the stirring chamber, which can effectively increase the surface density of the inner wall of the heat-conducting clamp cavity, greatly increase the corrosion resistance inside the heat-conducting clamp cavity, and help improve the heat transfer efficiency of the heat transfer oil.
[0016] The advantages and positive effects of this invention are as follows: Silicate is added to the mixing chamber through the solid material feeding hopper, and emulsifier and penetrant are added to the mixing chamber through the liquid material feeding hopper. Before adding silicate, emulsifier, and penetrant, water is added to the mixing chamber. After the drive motor starts and the worm gear reducer decelerates, it drives the electromagnet drive shaft to rotate. Under the action of electromagnetic force, the electromagnet drive shaft drives the stirrer to rotate at high speed, so that the solution forms a circulation, thereby allowing the solute to quickly dissolve into the solution. Furthermore, under the action of the ultrasonic rod, the large molecular suspensions formed by the emulsifier and penetrant are dispersed, thereby rapidly improving the mixing efficiency and improving the uniformity and durability of the mixing. After processing, the mixture can be discharged through the discharge pipe located in the belly of the mixing chamber. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a structural schematic diagram of the present invention (the lower half of the mixing chamber is partially sectioned);
[0019] Figure 2 This is a structural schematic diagram of the present invention (the upper half of the mixing chamber is partially sectioned);
[0020] Figure 3 This is a schematic diagram of the structure of the present invention (the solid material feeding hopper is half-sectioned);
[0021] Figure 4 This is a schematic diagram of the structure of the magnetic induction rotating shaft in this invention;
[0022] Figure 5 This is a schematic diagram of the sealing shaft in this invention;
[0023] Figure 6 yes Figure 4 Schematic diagram of the full cross-section of the central AA direction;
[0024] Figure 7 This is a schematic diagram of the stirrer in this invention.
[0025] The labels in the attached diagram are described as follows: 10. Drive motor; 11. Worm gear reducer; 12. Shearing chamber; 13. Solid material feeding hopper; 15. Liquid material feeding hopper; 16. Electrical control cabinet; 17. Premixing device structural frame; 18. Heat-conducting clamp cavity; 19. Agitator; 20. Synchronous chain; 21. Sawtooth shearing roller; 22. Spur gear; 23. Dispersion cover; 24. Mixing chamber; 25. Magnetic induction shaft; 26. Bearing; 27. Permanent magnet; 28. Sealing shaft; 29. Electromagnetic drive shaft; 30. Support rod; 31. Outer ring spiral stirring blade; 32. Inner ring spiral stirring blade; 33. Ultrasonic generator; 34. Ultrasonic rod. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0027] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:
[0028] like Figure 1-7 As shown, the present invention discloses a premixing device for mixing concrete surface hardener and its preparation process, comprising a mixing chamber 24 mounted on a premixing device frame 17 for containing the solution solute for preparing the concrete surface hardener. A hollow, unidirectionally penetrating sealed shaft 28 is fixed inside the mixing chamber 24. At least two bearings 26 are provided outside the sealed shaft 28, and a stirrer 19 is rotatably mounted outside the sealed shaft 28. The stirrer 19 includes a magnetic induction shaft 25 mounted on the bearings 26, a support rod 30 fixed outside the magnetic induction shaft 25, and an outer ring spiral welded and fixed to the support rod 30. The stirring blade 31 has permanent magnets 27 fixedly arranged in a ring at intervals on the inner wall of the magnetic induction shaft 25. The electromagnet drive shaft 29 passes through the sealed shaft 28 from the outside and is coupled with the permanent magnets 27 by electromagnetic force. When the electromagnet drive shaft 29 rotates under the drive of the worm gear reducer 11, the stirrer 19 can rotate and stir in the stirring chamber 24. The drive motor 10 and the worm gear reducer 11 matched with the drive motor 10 are fixed on the premixing device structure frame 17, and the output shaft of the worm gear reducer 11 is coaxially connected to the electromagnet drive shaft 29 through a flexible coupling.
[0029] The mixing chamber 24 is provided with a solid material feeding hopper 13 for feeding solute and a liquid material feeding hopper 15 for feeding solution.
[0030] An electrical control cabinet 16, which is matched with the drive motor 10 and the electromagnet drive shaft 29, is also fixed on the premixing device structure frame 17.
[0031] In one embodiment, the stirrer 19 is further provided with a plurality of support rods 30 at intervals for fixing the inner ring spiral stirring blades 32. The spiral diameter of the inner ring spiral stirring blades 32 is smaller than that of the outer ring spiral stirring blades 31, and the spiral direction of the inner ring spiral stirring blades 32 is opposite to that of the outer ring spiral stirring blades 31. Thus, when the stirrer 19 rotates, the external hardener solution located away from the magnetic induction shaft 25 will be stirred in one direction by the action of the outer ring spiral stirring blades 31, while the inner ring spiral stirring blades 32 will stir the hardener solution close to the magnetic induction shaft 25 in the opposite direction. This causes the hardener solution to form an internal and external reflux circulation, which is beneficial to improving the mixing efficiency and the homogenization degree of the mixed solution.
[0032] In one embodiment, a shearing chamber 12 is provided below the solid material feeding hopper 13. Two mutually shearing saw blade shearing rollers 21 are rotatably provided in the shearing chamber 12 to break up the solid mixture and prevent lumps of material from falling into the mixing chamber 24 and affecting the mixing quality. The saw blade shearing rollers 21 are driven by a motor.
[0033] In one embodiment, a sprocket is keyed to the outer end of the shaft of the sawtooth shearing roller 21 and the output shaft of the worm gear reducer 11, and a synchronous chain 20 is provided between the sprockets. A meshing spur gear 22 is keyed to the other end of the two sawtooth shearing rollers 21. In this way, the sawtooth shearing rollers 21 can rotate and shear each other under the action of the synchronous chain 20, the spur gear 22 and the sprocket as transmission components, without the need to install a separate matching drive motor, which is simpler and more efficient.
[0034] In one embodiment, to improve safety and prevent material from splashing during feeding, a dispersion cover 23 is welded and fixed inside the solid material feeding hopper 13. The dispersion cover 23 is a "roof" shaped bent plate and is located directly above the shearing overlap part of the saw blade shearing roller 21. This effectively prevents hand intrusion and avoids injury caused by splashing particles.
[0035] In one embodiment, an ultrasonic generator 33 is fixedly mounted on the premixing device frame 17, and an ultrasonic rod 34, as an accessory of the ultrasonic generator 33, extends through the stirring chamber 24 into its inner abdomen. The axis of the ultrasonic rod 34 is parallel to the axis of the stirrer 19. Since the large molecular suspension (emulsifier, penetrant) is concentrated in the abdomen of the stirring chamber 24, it will flow back under the stirring action of the stirrer 19. After passing through the ultrasonic rod 34, it will be broken and dispersed under the action of ultrasound, thereby causing the large molecular suspension to separate from the large clump structure into small clumps and merge more quickly into the emulsifier and penetrant. This is beneficial to improve the preparation efficiency of mixing and improve the uniformity of mixing.
[0036] In one embodiment, a heat-conducting cavity 18 is further provided outside the stirring chamber 24, such as... Figure 2 Viewed from the side, the heat-conducting clamp cavity 18 is a U-shaped clamp structure. Heat-conducting oil is introduced into the heat-conducting clamp cavity 18 to conduct heat to the stirred object in the stirring chamber 24, which helps to improve the dissolution efficiency of the solution. In addition, maintaining a stable temperature facilitates the dissolution of solutes of a specified size. The encircling heat-conducting clamp design makes the heating more uniform, avoids local overheating, and has a better heat preservation effect.
[0037] In one embodiment, a graphene oxide coating is applied to the inner surface of the heat-conducting clamp cavity 18 and the inner surface of the stirring chamber 24, which can effectively increase the surface density of the inner wall of the heat-conducting clamp cavity 18, greatly increase the corrosion resistance inside the heat-conducting clamp cavity 18, and help improve the heat transfer efficiency of the heat transfer oil.
[0038] In specific implementation, silicate is added to the mixing chamber 24 through the solid material feeding hopper 13, and emulsifier and penetrant are added to the mixing chamber 24 through the liquid material feeding hopper 15. Before adding silicate, emulsifier, and penetrant, water is added to the mixing chamber 24. After the drive motor 10 starts, the electromagnet drive shaft 29 is driven to rotate after being decelerated by the worm gear reducer 11. The electromagnet drive shaft 29 drives the stirrer 19 to rotate at high speed under the action of electromagnetic force, so that the solution forms a circulation, thereby allowing the solute to quickly dissolve into the solution. Under the action of the ultrasonic rod 34, the large molecular suspension formed by the emulsifier and penetrant is broken up, thereby quickly improving the mixing efficiency and improving the uniformity and persistence of the mixture. After processing, the mixture can be discharged through the discharge pipe with a check valve body located in the belly of the mixing chamber 24.
[0039] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.
Claims
1. A premixing device for mixing concrete surface hardener and its preparation process, comprising a mixing chamber (24) disposed on a premixing device structural frame (17) for containing a solution solute for preparing a concrete surface hardener, characterized in that: A hollow, unidirectionally penetrating sealing shaft (28) is fixed inside the mixing chamber (24). At least two bearings (26) are provided on the outside of the sealing shaft (28), and a stirrer (19) is rotatably mounted on the outside of the sealing shaft (28). The stirrer (19) includes a magnetic induction shaft (25) mounted on the bearings (26), a support rod (30) fixed on the outside of the magnetic induction shaft (25), and an outer ring spiral stirring blade (31) welded and fixed on the support rod (30). Permanent magnets (27) are fixedly fixed in a ring at intervals on the inner wall of the magnetic induction shaft (25). The electromagnet drive shaft (29) is inserted into the sealed shaft (28) from the outside and coupled with the permanent magnet (27) by electromagnetic force. When the electromagnet drive shaft (29) rotates under the drive of the worm gear reducer (11), the stirrer (19) can rotate and stir in the stirring chamber (24). The drive motor (10) and the worm gear reducer (11) matched with the drive motor (10) are fixed on the premixing device structure frame (17), and the output shaft of the worm gear reducer (11) is coaxially connected to the electromagnet drive shaft (29) through a flexible coupling. The mixing chamber (24) is provided with a solid material feeding hopper (13) for feeding solute and a liquid material feeding hopper (15) for feeding solution; An electrical control cabinet (16) for the drive motor (10) and the electromagnet drive shaft (29) is also fixedly installed on the premixing device frame (17).
2. The premixing device for mixing concrete surface hardener and its preparation process according to claim 1, characterized in that: The stirrer (19) is also fixedly provided with several support rods (30) at intervals for fixing the inner ring spiral stirring blades (32). The spiral diameter of the inner ring spiral stirring blades (32) is smaller than that of the outer ring spiral stirring blades (31), and the spiral direction of the inner ring spiral stirring blades (32) is opposite to that of the outer ring spiral stirring blades (31). In this way, when the stirrer (19) rotates, the external hardener solution located away from the magnetic induction shaft (25) will be stirred in one direction under the action of the outer ring spiral stirring blades (31), while the inner ring spiral stirring blades (32) will stir the hardener solution close to the magnetic induction shaft (25) in the opposite direction, thereby making the hardener solution form an internal and external reflux cycle.
3. The premixing device for mixing concrete surface hardener and its preparation process according to claim 2, characterized in that: Below the solid material feeding hopper (13) is a shearing chamber (12), in which two mutually shearing saw blade shearing rollers (21) are rotatably installed to break up the solid mixture and prevent lumps of material from falling into the mixing chamber (24) and affecting the mixing quality. The saw blade shearing rollers (21) are driven by a motor.
4. The premixing device for mixing concrete surface hardener and its preparation process according to claim 3, characterized in that: A sprocket is keyed to the outer end of the rotating shaft of the saw blade shearing roller (21) and the output shaft of the worm gear reducer (11), and a synchronous chain (20) is provided between the sprockets. A meshing spur gear (22) is keyed to the other end of the two saw blade shearing rollers (21). In this way, under the action of the synchronous chain (20), the spur gear (22) and the sprocket as transmission components, the saw blade shearing rollers (21) can shear each other and rotate.
5. The premixing device for mixing concrete surface hardener and its preparation process according to claim 4, characterized in that: A dispersion cover (23) is welded and fixed inside the solid material feeding hopper (13). The dispersion cover (23) is a "roof" shaped bent plate and is located directly above the shearing overlap part of the saw blade shearing roller (21).
6. The premixing device for mixing concrete surface hardener and its preparation process according to claim 5, characterized in that: An ultrasonic generator (33) is fixedly mounted on the premixing device frame (17), and an ultrasonic rod (34), which is an accessory of the ultrasonic generator (33), extends through the mixing chamber (24) into its inner abdomen. The axis of the ultrasonic rod (34) is parallel to the axis of the stirrer (19).
7. The premixing device for mixing concrete surface hardener and its preparation process according to claim 6, characterized in that: The stirring chamber (24) is also provided with a heat-conducting clamp cavity (18) outside. When viewed from the side, the heat-conducting clamp cavity (18) is a U-shaped clamp cavity structure. Heat-conducting oil is introduced into the heat-conducting clamp cavity (18) to conduct heat to the stirred object in the stirring chamber (24), which is beneficial to improve the dissolution efficiency of the solution.
8. The premixing device for mixing concrete surface hardener and its preparation process according to claim 7, characterized in that: The inner surface of the heat-conducting clamp cavity (18) and the inner surface of the stirring chamber (24) are coated with graphene oxide, which can effectively increase the surface density of the inner wall of the heat-conducting clamp cavity (18), greatly increase the corrosion resistance of the heat-conducting clamp cavity (18), and help improve the heat transfer efficiency of the heat transfer oil.