A building waste stirring and mixing device
By designing a construction waste mixing device, and utilizing a combination of spiral conveyor, material divider, and spray defoamer, the problem of difficult-to-eliminate air bubbles in fine construction waste powder was solved, thereby improving the compactness and load-bearing capacity of the engineering filling materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI PUDONG XINQU XINGSHENG ROADBED MATERIAL CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-12
AI Technical Summary
After construction waste is crushed into fine powder, it contains a large amount of needle-like and flaky particles, resulting in loose aggregate and the formation of free voids. The presence of air bubbles weakens the compactness and strength of the engineering filling material, making it difficult for defoamers to effectively act on the mixture.
A construction waste mixing device was designed, comprising a spiral blade, a horizontal bar, a vertical bar, a mixing rod, and a defoaming component. The spiral blade transports raw materials to a conical guide plate, the material is divided by a separating rod, further divided by a triangular plate and a crushing rod, and a nozzle sprays defoaming agent to achieve multi-level defoaming.
It improves the defoaming effect and enhances the compactness and overall load-bearing capacity of the engineering filling materials.
Smart Images
Figure CN224345786U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction waste treatment technology, and in particular to a construction waste mixing and blending device. Background Technology
[0002] Construction waste is classified as general industrial solid waste, with heavy metal leaching being the primary environmental impact indicator. my country experiences a massive increase in solid waste stockpiles annually, and the open-air dumping of large quantities of solid waste not only occupies land but also poses environmental risks such as heavy metal migration and acid rain leaching. Construction waste is categorized into engineering slag, mud, decoration waste, and waste generated during demolition projects, including construction waste concrete. Decoration waste, demolition waste, and construction waste concrete must be processed and utilized in resource recovery facilities.
[0003] Nowadays, construction waste is crushed and then finely pulverized. The fine pulverized construction waste and engineering mud are then used as raw materials. Soft soil stabilizers, cement, admixtures, and additives are added according to the mix design to produce engineering filling materials. These materials can be used in municipal pipeline trenches, foundation pit backfilling, foundation treatment and roadbed replacement, foundation pit top slab filling, and other projects, enabling the reuse of construction waste.
[0004] When construction waste and other raw materials are used to produce engineering filling materials, mixing equipment is required. Under normal circumstances, when cement and gravel are made into concrete, air bubbles will be generated between the cement and gravel. However, after construction waste is crushed into fine powder, the particles are of different sizes and contain a large amount of needle-like and flaky particles. These particles will not be dense and will form free voids, making it easier for air bubbles to be generated. The presence of air bubbles will weaken the compactness of the engineering filling material and reduce its strength. This is because air bubbles occupy the internal space of the engineering filling material, reducing the content of effective solid materials, thereby reducing the overall load-bearing capacity of the engineering filling material. Therefore, it is generally necessary to add organosilicon defoamers inside and outside the mixing device during preparation. However, when the defoamer is poured into the mixture, it is difficult for the defoamer to act on every part of the mixture through stirring alone, resulting in an unsatisfactory defoaming effect. Utility Model Content
[0005] (I) Purpose of the utility model
[0006] In view of this, the purpose of this utility model is to propose a construction waste mixing device. The technical problem it aims to solve is that after construction waste is crushed into fine powder, the particles are of varying sizes, and the fine powder contains a large amount of needle-like and flaky particles. These particles are not dense and form free voids, which makes it easier for air bubbles to form. The presence of air bubbles weakens the compactness of the engineering filling material and reduces its strength. This is because air bubbles occupy the internal space of the engineering filling material, reducing the content of effective solid materials and thus reducing the overall load-bearing capacity of the engineering filling material. Therefore, it is generally necessary to add organosilicon defoamers inside and outside the mixing device during preparation. However, when the defoamer is poured into the mixture, it is difficult for the defoamer to act on every part of the mixture through stirring alone, resulting in an unsatisfactory defoaming effect.
[0007] (II) Technical Solution
[0008] To achieve the above-mentioned technical objectives, this utility model provides a construction waste mixing and blending device:
[0009] It includes a mixing tank, a conveying hopper fixed to the bottom of the mixing tank and connected to it, a discharge pipe fixed to the bottom of the conveying hopper and connected to it, a cylinder inside the mixing tank, multiple supports fixed to the bottom of the cylinder, and the ends of the supports away from the cylinder being fixed to the inner wall of the conveying hopper, a rotating shaft rotatably connected to the inner wall of the bottom of the cylinder, a spiral blade fixed to the outside of the rotating shaft, multiple grooves opened at the bottom of the cylinder, three horizontal bars fixed to the top of the rotating shaft, a vertical bar fixed to the bottom of the horizontal bars away from the rotating shaft, multiple stirring rods fixed to one side of the vertical bar, and a defoaming component for eliminating air bubbles in the mixture provided at the top of the cylinder.
[0010] Preferably, an annular baffle is fixed to the inner wall of the top of the mixing tank, a storage tray is provided inside the annular baffle, and multiple connecting plates are fixed at equal intervals along the radial direction of the storage tray. The end of the connecting plate away from the storage tray is fixed to the inner wall of the annular baffle. The top of the rotating shaft passes through the storage tray and is rotatably connected to the storage tray. There is a feeding chamber between adjacent connecting plates for material to pass through.
[0011] Preferably, a motor is installed on the top of the storage tray, and the top of the rotating shaft is fixed to the output end of the motor.
[0012] Preferably, the defoaming component includes a conical guide plate fixed to the outer side of the top of the cylinder. Multiple sets of defoaming components are arranged on the outer side of the conical guide plate. Each set of defoaming components includes multiple material distribution rods fixed to the conical guide plate. The multiple material distribution rods in each set of defoaming components are distributed at equal intervals along the radial direction of the conical guide plate, and there are gaps between the material distribution rods in adjacent defoaming components.
[0013] Preferably, a triangular plate is fixed between the horizontal bar and the vertical bar, and multiple scraping rods are fixed at equal intervals on one side of the triangular plate, with the ends of the multiple scraping rods away from the triangular plate located in corresponding gaps.
[0014] Preferably, the inner wall of the top of the mixing tank is provided with an annular pipe, multiple nozzles are installed at the bottom of the annular pipe, multiple support columns are fixed at the top of the annular pipe, the top of the support columns are fixed to an annular baffle, and an infusion pipe is fixed and connected to the annular pipe.
[0015] As can be seen from the above technical solutions, this application has the following beneficial effects:
[0016] 1: When the shaft rotates, it also drives the spiral blade to rotate. When the spiral blade rotates, it conveys the raw material at the bottom of the mixing tank to the top of the cylinder. After the raw material is conveyed to the top of the cylinder, it slides on the conical guide plate. Due to the setting of multiple material distribution rods, the raw material can be divided, thereby breaking the air bubbles inside the raw material.
[0017] 2: When the crossbar rotates, it also drives the triangular plate and the crushing rod to rotate. When the crushing rod rotates in the gap, it can further divide the raw material and further break the air bubbles inside the raw material.
[0018] 3: After the raw material is conveyed onto the conical guide plate, it slides downwards on the conical guide plate. At this time, the defoamer is sprayed onto the raw material through the nozzle, so that the defoamer can fully contact the raw material and improve the defoaming effect. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0020] Figure 1 A structural schematic diagram of a construction waste mixing and blending device provided by this utility model;
[0021] Figure 2 This is a schematic diagram of the internal structure of the mixing tank provided by this utility model;
[0022] Figure 3 This is a cross-sectional structural diagram of a construction waste mixing and blending device provided by the present invention.
[0023] Figure descriptions: 1. Mixing tank; 2. Feeding hopper; 3. Discharge pipe; 4. Cylinder; 5. Support; 6. Groove; 7. Rotating shaft; 8. Spiral blade; 9. Horizontal bar; 10. Vertical bar; 11. Stirring rod; 12. Annular baffle; 13. Storage tray; 14. Motor; 15. Connecting plate; 16. Feeding chamber; 17. Conical guide plate; 18. Distributing rod; 19. Gap; 20. Triangular plate; 21. Crushing rod; 22. Annular pipe; 23. Nozzle; 24. Support column; 25. Infusion pipe. Detailed Implementation
[0024] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of the various embodiments of this disclosure. Certain details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures.
[0025] Reference Figure 1-3 :
[0026] In one embodiment of this utility model, a construction waste mixing and blending device is provided, including a mixing tank 1, a conveying hopper 2 fixed and connected to the bottom of the mixing tank 1, a discharge pipe 3 fixed and connected to the bottom of the conveying hopper 2, a cylinder 4 disposed inside the mixing tank 1, multiple supports 5 fixed to the bottom of the cylinder 4, and the end of the support 5 away from the cylinder 4 fixed to the inner wall of the conveying hopper 2, a rotating shaft 7 rotatably connected to the bottom inner wall of the cylinder 4, a spiral blade 8 fixed to the outside of the rotating shaft 7, multiple grooves 6 opened at the bottom of the cylinder 4, three horizontal bars 9 fixed to the top of the rotating shaft 7, a vertical bar 10 fixed to the bottom of the horizontal bar 9 away from the rotating shaft 7, multiple stirring rods 11 fixed to one side of the vertical bar 10, and a defoaming component for eliminating air bubbles in the mixture disposed at the top of the cylinder 4.
[0027] The mixing tank 1 has an annular baffle 12 fixed to the inner wall of the top. A storage tray 13 is provided inside the annular baffle 12. Multiple connecting plates 15 are fixed at equal intervals along the radial direction of the storage tray 13. The end of the connecting plate 15 away from the storage tray 13 is fixed to the inner wall of the annular baffle 12. The top of the rotating shaft 7 passes through the storage tray 13 and is rotatably connected to the storage tray 13. There is a feeding chamber 16 between adjacent connecting plates 15 for material to pass through. A motor 14 is installed on the top of the storage tray 13. The top of the rotating shaft 7 is fixed to the output end of the motor 14.
[0028] It should be noted that the motors 14 in this embodiment are all conventional devices known to those skilled in the art and can be selected or customized according to actual needs. In this embodiment, we only use them and do not improve their structure and function. For those skilled in the art, their setting method, installation method and electrical connection method can be adjusted and operated in accordance with the requirements of their instruction manual, and will not be described in detail here.
[0029] In addition, the defoaming assembly includes a conical guide plate 17 fixed to the outer side of the top of the cylinder 4. Multiple sets of defoaming components are arranged on the outer side of the conical guide plate 17. Each set of defoaming components includes multiple distribution rods 18 fixed to the conical guide plate 17. The multiple distribution rods 18 in each set of defoaming components are evenly distributed radially along the conical guide plate 17. There are gaps 19 between the distribution rods 18 in adjacent defoaming components. A triangular plate 20 is fixed between the horizontal bar 9 and the vertical bar 10. Multiple crushing rods 21 are evenly fixed on one side of the triangular plate 20. The ends of the multiple crushing rods 21 furthest from the triangular plate 20 are respectively located in the corresponding gaps 19. The inner wall of the top of the tank 1 is provided with an annular pipe 22, and multiple nozzles 23 are installed at the bottom of the annular pipe 22. Multiple support columns 24 are fixed at the top of the annular pipe 22, and the top of the support columns 24 are fixed to the annular baffle 12. An infusion pipe 25 is fixed and connected to the annular pipe 22. It is worth noting that when raw materials such as construction waste fine powder, engineering mud, cement, admixtures, and water are poured into the mixing tank 1 from the feeding chamber 16 to prepare engineering filling materials, the amount of raw materials poured into the mixing tank 1 slightly exceeds the bottom of the conical guide plate 17, so that when the raw materials slide down from the conical guide plate 17, they are directly dissolved into the raw materials in the mixing tank 1.
[0030] In use, construction waste powder, engineering slurry, cement, admixtures, water, and other raw materials are poured into the mixing tank 1 from the feeding chamber 16 to prepare the engineering filling material. Then, the motor 14 is started to drive the rotating shaft 7 to rotate. When the rotating shaft 7 rotates, it drives the vertical rod 10 and the stirring rod 11 to rotate, so that the stirring rod 11 stirs and mixes the raw materials in the mixing tank 1. When the rotating shaft 7 rotates, it also drives the spiral blade 8 to rotate. When the spiral blade 8 rotates, it conveys the raw materials at the bottom of the mixing tank 1 to the top of the cylinder 4. After the raw materials are conveyed to the top of the cylinder 4, they slide down the conical guide plate 17. Due to the setting of multiple dividing rods 18, the raw materials can be divided, thereby breaking the air bubbles inside the raw materials. When the horizontal rod 9 rotates, it also drives the triangular plate 20 and the crushing rod 21 to rotate. The crushing rod 21 fills the gaps. When the internal rotation of the 19 can further divide the raw materials and break up the air bubbles inside the raw materials, it is worth noting that the infusion pipe 25 is connected to the external defoamer conveying equipment. Due to the setting of the spiral blade 8, the raw materials located at the bottom, middle and top of the raw material layer in the mixing tank 1 can be conveyed to the conical guide plate 17 in sequence. After the raw materials are conveyed to the conical guide plate 17, the raw materials slide down on the conical guide plate 17. At this time, the raw materials are spread out on the conical guide plate 17. At this time, the defoamer is sprayed on the raw materials through the nozzle 23, so that the defoamer can fully contact the raw materials, improving the defoaming effect. Multi-layer defoaming is beneficial to eliminate air bubbles in the engineering filling materials, thereby improving the strength and overall load-bearing capacity of the engineering filling materials.
[0031] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.
Claims
1. A construction waste mixing and blending device, comprising a mixing tank (1), characterized in that, The mixing tank (1) is fixed to the bottom and connected to a conveying hopper (2). The conveying hopper (2) is fixed to the bottom and connected to a discharge pipe (3). A cylinder (4) is provided inside the mixing tank (1). Multiple supports (5) are fixed to the bottom of the cylinder (4). The end of the support (5) away from the cylinder (4) is fixed to the inner wall of the conveying hopper (2). A rotating shaft (7) is rotatably connected to the inner wall of the bottom of the cylinder (4). A spiral blade (8) is fixed to the outside of the rotating shaft (7). Multiple grooves (6) are opened at the bottom of the cylinder (4). Three horizontal bars (9) are fixed to the top of the rotating shaft (7). A vertical bar (10) is fixed to the bottom of the horizontal bar (9) away from the rotating shaft (7). Multiple stirring rods (11) are fixed to one side of the vertical bar (10). A defoaming component for eliminating air bubbles in the mixture is provided at the top of the cylinder (4).
2. The construction waste mixing and blending device according to claim 1, characterized in that, The mixing tank (1) has an annular baffle (12) fixed on the inner wall of the top. A storage tray (13) is provided inside the annular baffle (12). Multiple connecting plates (15) are fixed at equal intervals along the radial direction on the outer side of the storage tray (13). The end of the connecting plate (15) away from the storage tray (13) is fixed to the inner wall of the annular baffle (12). The top of the rotating shaft (7) passes through the storage tray (13) and is rotatably connected to the storage tray (13). There is a feeding chamber (16) between adjacent connecting plates (15) for material to pass through.
3. The construction waste mixing and blending device according to claim 2, characterized in that, A motor (14) is installed on the top of the tray (13), and the top of the rotating shaft (7) is fixed to the output end of the motor (14).
4. The construction waste mixing and blending device according to claim 1, characterized in that, The defoaming component includes a conical guide plate (17) fixed to the outer side of the top of the cylinder (4). Multiple sets of defoaming components are provided on the outer side of the conical guide plate (17). Each set of defoaming components includes multiple material distribution rods (18) fixed to the conical guide plate (17). The multiple material distribution rods (18) in each set of defoaming components are distributed at equal intervals along the radial direction of the conical guide plate (17). There are gaps (19) between the material distribution rods (18) in adjacent defoaming components.
5. A construction waste mixing and blending device according to claim 4, characterized in that, A triangular plate (20) is fixed between the horizontal bar (9) and the vertical bar (10). Multiple scrap rods (21) are fixed at equal intervals on one side of the triangular plate (20). The ends of the multiple scrap rods (21) away from the triangular plate (20) are respectively located in the corresponding gaps (19).
6. A construction waste mixing and blending device according to claim 1, characterized in that, The mixing tank (1) has an annular pipe (22) on its top inner wall. Multiple nozzles (23) are installed at the bottom of the annular pipe (22). Multiple support columns (24) are fixed at the top of the annular pipe (22). The top of the support column (24) is fixed to the annular baffle (12). An infusion pipe (25) is fixed and connected to the annular pipe (22).