Novel solid waste-based phase change concrete preparation device
By using a horizontal screw conveyor and mixing box system in the concrete preparation process, a uniform mixture of solid waste recycled aggregate and phase change material is achieved, solving the problem of uneven distribution, avoiding excessive temperature gradients, and extending the service life of the concrete.
Patent Information
- Application Number
- CN202422682546.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-05
AI Technical Summary
Phase change materials and solid waste are easily unevenly distributed during the concrete preparation process, resulting in excessive local temperature gradients inside the concrete structure, causing temperature cracks and affecting its service life.
A horizontal screw conveyor and mixing tank system is used to receive solid waste recycled aggregates and phase change materials through the horizontal screw conveyor, and perform initial mixing during the conveying process, combined with pre-cooling in the temperature-controlled water tank and secondary mixing in the intermediate mixing bin. Then, additives are sprayed into the mixing tank through a ring infusion pipeline for re-mixing to ensure uniform distribution.
It effectively solves the problem of uneven distribution of phase change materials, avoids excessive local temperature gradient inside the concrete, and extends the service life of the concrete.
Smart Images
Figure CN223369713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete preparation equipment, in particular to a novel solid waste-based phase change concrete preparation device. Background Art
[0002] Phase change material (PCM) is a latent heat storage material with a high heat storage density and small volume change. It can transfer heat energy along with a change in physical state. Compared with ordinary building materials, PCM can both store and release heat. Its application in buildings is an effective means to effectively reduce building energy consumption. Currently, PCM has been used in the concrete preparation process to form phase change concrete, which effectively alleviates the damage caused by freeze-thaw cycles in concrete structures. At the same time, in order to comprehensively utilize solid waste resources, solid waste is currently often used to solve the problem of alleviating the shortage of natural aggregates for concrete and achieve green and sustainable development of the construction industry. However, the following problems exist when solid waste and PCM are used in concrete preparation: when the PCM is mixed with aggregates formed from solid waste and other additives, the mixing becomes more difficult. When the PCM is unevenly distributed, it will cause excessive local temperature gradients within the concrete structure, resulting in temperature cracks within the concrete. Utility Model Content
[0003] The purpose of this utility model is to provide a new solid waste-based phase change concrete preparation device with a reasonable structure and reliable use, to solve the problem of uneven distribution of phase change materials, to avoid the occurrence of excessive local temperature gradients inside the concrete structure, and to extend the service life.
[0004] The technical solution of the utility model is:
[0005] A novel solid waste-based phase change concrete preparation device includes a mixing box, and its technical points are: a horizontal screw conveyor is fixed on the top of the mixing box, a temperature-regulating water tank is provided on the outside of the horizontal screw conveyor, a solid waste recycled aggregate inlet and a phase change material inlet are provided on the top surface of the starting section of the horizontal screw conveyor in sequence, a material discharge riser is provided on the bottom surface of the end section of the horizontal screw conveyor, an intermediate mixing bin is suspended in the mixing box, the material discharge riser is inserted into the intermediate mixing bin, a bracket is provided in the intermediate mixing bin and an intermediate mixing mechanism is fixed by the bracket, a mixing discharge port is provided at the bottom of the intermediate mixing bin, and a material discharge port is provided at the lower end of the mixing discharge port. Valve, the lower part of the mixing box is provided with a vertical shaft coinciding with the center line of the mixing lower discharge port, the upper end of the vertical shaft is provided with a conical bulk plate corresponding to the mixing lower discharge port, and the outside of the vertical shaft is provided with a stirring blade, the lower end of the temperature regulating water tank is provided with a temperature regulating water inlet pipeline, the upper end is provided with a temperature regulating water outlet pipeline, the temperature regulating water outlet pipeline is further provided with a branch, the end of the branch is connected to the water inlet of the additive mixing box, the upper part of the mixing box is provided with an annular infusion pipeline wrapped around the outside of the middle mixing bin, the annular infusion pipeline is connected to the liquid outlet of the additive mixing box, a plurality of spray ports are evenly provided on the lower surface of the annular infusion pipeline, and a regulating valve is provided on the branch.
[0006] In the above-mentioned novel solid waste-based phase change concrete preparation device, the additive mixing box is fixed to the top of the mixing box, and a pressurizer connected to the additive mixing box is further provided on the top of the mixing box.
[0007] The above-mentioned new solid waste-based phase change concrete preparation device, the intermediate stirring mechanism includes a dual-output shaft reduction motor supported at the center of the bracket, an upper stirring blade arranged at the upper end of the upper output shaft of the dual-output shaft reduction motor, and a lower stirring blade arranged at the lower end of the lower output shaft of the dual-output shaft reduction motor. The upper stirring blade is inserted into the discharge vertical pipe, and the lower stirring blade is located at the lower part of the intermediate stirring bin.
[0008] In the above-mentioned novel solid waste-based phase change concrete preparation device, the lower end of the vertical shaft is connected and fixed to the stirring motor at the bottom of the mixing box.
[0009] In the above-mentioned novel solid waste-based phase change concrete preparation device, the inner wall of the mixing box is provided with an annular support ring corresponding to the mixing blades.
[0010] In the above-mentioned novel solid waste-based phase change concrete preparation device, the upper ends of the solid waste recycled aggregate inlet and the phase change material inlet respectively pass through the top surface of the temperature regulating water tank and are connected to the lower end of the feeding hopper, and a regulating valve is fixed to the lower end of the feeding hopper.
[0011] In the above-mentioned novel solid waste-based phase change concrete preparation device, the discharge riser and the mixing outlet coincide with the center line of the mixing box.
[0012] The beneficial effects of the utility model are:
[0013] Solid waste recycled aggregate and phase change material are received by a horizontal screw conveyor and initially stirred during the conveying process. At the same time, they are pre-cooled by a temperature-controlled water tank before entering the mixing box to enhance the use strength of the solid waste recycled aggregate and phase change material. The solid waste recycled aggregate and phase change material are stirred for the second time in the intermediate mixing bin and then placed in the lower part of the mixing box. In this process, other additives are stirred and mixed by pre-cooled water in the additive mixing box, and then sprayed into the solid waste recycled aggregate and phase change material mixture in the lower part of the mixing box through the annular infusion pipeline and the spray port for re-mixing. Through multiple stirring and mixing, the problem of uneven distribution of phase change material is solved, the phenomenon of excessive local temperature gradient inside the concrete structure is avoided, and the service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural diagram of the present utility model.
[0015] In the figure: 1. Feed hopper, 2. Control valve, 3. Temperature-controlled water outlet pipeline, 4. Branch line, 5. Control valve, 6. Temperature-controlled water tank, 7. Horizontal screw conveyor, 8. Temperature-controlled water inlet pipeline, 9. Discharge riser, 10. Intermediate mixing chamber, 11. Annular liquid infusion pipeline, 12. Upper stirring blade, 13. Dual-output shaft reduction motor, 14. Bracket, 15. Lower stirring blade, 16. Discharge valve, 17. Conical bulk plate, 18. Vertical shaft, 19. Stirring blade, 20. Stirring motor, 21. Annular support ring, 22. Pressurizer, 23. Additive mixing box, 24. Liquid spray port, 25. Stirring box. DETAILED DESCRIPTION
[0016] The utility model is described in detail according to the accompanying drawings.
[0017] like Figure 1 As shown, the novel solid waste-based phase change concrete preparation device includes a mixing box 25.
[0018] A horizontal screw conveyor 7 is fixed to the top of the mixing tank 25, with a temperature-controlled water tank 6 located outside the horizontal screw conveyor 7. An inlet for solid waste recycled aggregate and an inlet for phase-change material are located on the top surface of the initial section of the horizontal screw conveyor 7, and a discharge riser 9 is located on the bottom surface of the final section of the horizontal screw conveyor 7. In this embodiment, the upper ends of the solid waste recycled aggregate inlet and the phase-change material inlet respectively pass through the top surface of the temperature-controlled water tank 6 and are connected to the lower end of the feed hopper 1, the lower end of which is fixed with a regulating valve 2.
[0019] An intermediate mixing chamber 10 is suspended in the mixing box 25, and the discharge vertical pipe 9 is inserted into the intermediate mixing chamber 10. A bracket 14 is provided in the intermediate mixing chamber 10, and an intermediate mixing mechanism is fixed by the bracket 14. A mixing lower outlet is provided at the bottom of the intermediate mixing chamber, and a discharge valve 16 is provided at the lower end of the mixing lower outlet. In this embodiment, the intermediate mixing mechanism includes a dual-output shaft reduction motor 13 supported at the center of the bracket 14, an upper stirring blade 12 provided at the upper end of the upper output shaft of the dual-output shaft reduction motor 13, and a lower stirring blade 15 provided at the lower end of the lower output shaft of the dual-output shaft reduction motor 13. The upper stirring blade 12 is inserted into the discharge vertical pipe 9, and the lower stirring blade 15 is located at the lower part of the intermediate mixing chamber 10. The discharge vertical pipe 9, the mixing lower outlet and the center line of the mixing box 25 coincide with each other.
[0020] The lower portion of the mixing box 25 is equipped with a vertical shaft 18, which coincides with the centerline of the mixing outlet. The upper end of the vertical shaft 18 is equipped with a conical bulk plate 17 corresponding to the mixing outlet. Stirring blades 19 are located on the outer side of the vertical shaft 18. In this embodiment, the inner wall of the mixing box 25 is equipped with an annular support ring 21 corresponding to the blades of the stirring blades 19. The lower end of the vertical shaft 18 is connected and fixed to the stirring motor 20 at the bottom of the mixing box 25.
[0021] The lower end of the temperature-controlled water tank 6 is provided with a temperature-controlled water inlet pipeline 8, and the upper end is provided with a temperature-controlled water outlet pipeline 3. The temperature-controlled water outlet pipeline 3 is further provided with a branch line 4, the terminal of which is connected to the water inlet of the additive mixing tank 23. The upper portion of the mixing tank 25 is built with an annular liquid infusion pipeline 11 wrapped around the outside of the intermediate mixing chamber 10. This annular liquid infusion pipeline 11 is connected to the liquid outlet of the additive mixing tank 23. The lower surface of the annular liquid infusion pipeline 11 is evenly distributed with multiple liquid spray ports 24. The branch line 4 is equipped with a regulating valve 5. In this embodiment, the additive mixing tank 23 is fixed to the top of the mixing tank 25, and a pressurizer 22 is also provided on the top of the mixing tank 25, which is connected to the additive mixing tank 23.
[0022] Working principle:
[0023] The solid waste recycled aggregate and phase change material are received by a horizontal screw conveyor 7 and conveyed to the intermediate mixing chamber 10. After secondary stirring by the upper and lower stirring blades, they are dispersed into the lower part of the mixing tank 25. At this time, other additives are stirred and mixed with pre-cooled water in the additive mixing tank 23. They are then sprayed into the solid waste recycled aggregate and phase change material mixture in the lower part of the mixing tank 25 through the annular infusion pipeline 11 and the spray port 24 for further mixing. Through multiple stirring and mixing, the phase change material and other additives are evenly dispersed in the product. At the same time, the temperature-controlled water tank 6 is used to pre-cool the raw materials during the above process to extend the product life.
[0024] The above embodiments of the present invention are described in detail. However, the above contents are only preferred embodiments of the present invention and should not be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.
Claims
1. A novel solid waste-based phase change concrete preparation device, comprising a mixing tank, characterized in that: A horizontal screw conveyor is fixed on the top of the mixing box, a temperature regulating water tank is provided on the outside of the horizontal screw conveyor, a solid waste recycled aggregate inlet and a phase change material inlet are provided on the top surface of the starting section of the horizontal screw conveyor in sequence, a material discharge riser is provided on the bottom surface of the last section of the horizontal screw conveyor, an intermediate mixing bin is suspended in the mixing box, the material discharge riser is inserted into the intermediate mixing bin, a bracket is provided in the intermediate mixing bin and an intermediate mixing mechanism is fixed by the bracket, a mixing lower outlet is provided at the bottom of the intermediate mixing bin, a discharge valve is provided at the lower end of the mixing lower outlet, and a material discharge valve is provided at the lower part of the mixing box. A vertical shaft with a centerline coinciding with the discharge port, a conical bulk plate corresponding to the mixing lower discharge port is provided at the upper end of the vertical shaft, a stirring blade is provided on the outer side of the vertical shaft, a tempering water inlet pipe is provided at the lower end of the tempering water tank, a tempering water outlet pipe is provided at the upper end, the tempering water outlet pipe is further provided with a branch, the end of the branch is connected to the water inlet of the additive mixing box, an annular liquid infusion pipe is built into the upper part of the mixing box and wrapped around the outside of the middle mixing bin, the annular liquid infusion pipe is connected to the liquid outlet of the additive mixing box, a plurality of liquid spray ports are evenly arranged on the lower surface of the annular liquid infusion pipe, and a regulating valve is provided on the branch; The additive mixing box is fixed on the top of the stirring box, and a pressurizer connected to the additive mixing box is further provided on the top of the stirring box; The intermediate stirring mechanism includes a dual-output shaft reduction motor supported at the center of the bracket, an upper stirring blade provided at the upper end of the upper output shaft of the dual-output shaft reduction motor, and a lower stirring blade provided at the lower end of the lower output shaft of the dual-output shaft reduction motor. The upper stirring blade is inserted into the discharge vertical pipe, and the lower stirring blade is located at the lower part of the intermediate stirring bin; The lower end of the vertical shaft is connected and fixed to the stirring motor at the bottom of the stirring box; The inner wall of the mixing box is provided with an annular support ring corresponding to the mixing blade; The material discharge vertical pipe, the mixing material discharge port and the center line of the mixing box coincide with each other.
2. The novel solid waste-based phase change concrete preparation device according to claim 1 is characterized in that: The upper ends of the solid waste recycled aggregate inlet and the phase change material inlet respectively pass through the top surface of the temperature regulating water tank and are connected to the lower end of the feeding hopper, and a regulating valve is fixed to the lower end of the feeding hopper.