A process for preparing dolomite mortar

Abstract

This invention discloses a dolomite mortar preparation process and a dedicated mixing device. The process includes dolomite modification, dry mixing of raw materials, and wet mixing with water. Its core lies in the use of a specially designed mixing device. This device is equipped with a shaft assembly and mixing components A, B, and C. Mixing component A intermittently meshes with the spaced teeth of a fixed gear through gear A. Combined with water pressure driving the extension, retraction, and rotation of the mixing rod B, it achieves intelligent switching between "directional" and "disordered" mixing, efficiently breaking up raw material agglomerates. During wet mixing, the same water supply system drives the mixing rod B to extend and simultaneously spray water from its end, achieving "mixing while adding water," avoiding localized over-wetting. The blades of mixing component B can extend radially and rotate, working in conjunction with the bottom scraper of mixing component C to form a three-dimensional composite mixing flow field, eliminating mixing dead zones. This invention significantly improves mixing uniformity and efficiency, ensuring the excellent performance and stability of the mortar product.

Description

Technical Field

[0001] This invention relates to the field of building material preparation technology, and in particular to a dolomite mortar preparation device and preparation process. Background Technology

[0002] Mortar, as an indispensable basic material in construction engineering, directly affects the overall quality and durability of the project. Dolomite, as a widely available and inexpensive mineral raw material, can be processed into powder and applied to mortar. This not only reduces production costs but also improves certain physical properties of the mortar. Therefore, developing a high-performance dolomite mortar preparation process has significant economic and environmental value.

[0003] Commonly available dolomite mortar ingredients typically include cement, dolomite sand (or dolomite powder), quartz sand, water, and common additives such as water-reducing agents and water-retaining thickeners. The following shortcomings exist: the strength improvement is limited, especially the long-term strength stability is insufficient, making it difficult to meet the requirements in some building scenarios with high strength requirements; It has poor fluidity, making construction difficult; it has poor water retention, making it prone to stratification and bleeding, which affects construction quality and mortar performance. It has weak resistance to seepage, freezing, and erosion, and its service life is relatively short in harsh environments (such as rainy, cold, or chemically corrosive environments). Some of the additives used are expensive and not environmentally friendly enough in the production process, which does not meet the requirements for the development of green buildings.

[0004] Currently, traditional dolomite mortar preparation often uses conventional mechanical mixing equipment to mix common dolomite mortar ingredients on the market. These devices typically consist of a mixing shaft and fixed mixing blades, and the materials are mixed by motor drive. The preparation process generally involves first putting dry powder materials such as cement, dolomite powder, and additives into the mixer for dry mixing, and then adding a certain amount of water at once or in batches for wet mixing until the mixture is uniform.

[0005] However, this traditional preparation process and equipment have gradually revealed many shortcomings in practical applications: First, it is difficult to guarantee the uniformity of mixing. The flow field inside a conventional mixer is relatively fixed, which can easily create mixing dead zones and cause powder agglomeration. In particular, it is difficult to achieve uniform micro-dispersion of powders with large density differences (such as cement and fly ash). This directly affects the homogeneity and stability of the finished mortar, resulting in large fluctuations in its mechanical properties. Secondly, the wet mixing process is inefficient and prone to quality problems. Traditional water addition methods often involve concentrated injection from the top of the mixing tank. The water flow is difficult to make full contact with the high-speed rotating dry powder instantly, which can easily cause local areas to become too wet and form clumps, while other areas may still be dry. This not only prolongs the required wet mixing time and reduces production efficiency, but also the resulting clumps will seriously affect the workability of the mortar (such as fluidity and water retention) and the strength of the final hardened body. Furthermore, the equipment has limited functionality and low automation. The two key process stages of dry mixing and wet mixing require manual judgment and operation switching. The shape and movement mode of the mixing blades are fixed and cannot be adaptively adjusted according to the needs of the process stages. The mixing effect of the entire process is highly dependent on the operator's experience, making it difficult to guarantee the stability of product quality between batches.

[0006] Therefore, there is an urgent need in this field for a new dolomite mortar preparation process and specialized equipment that can achieve efficient and uniform mixing and intelligently integrate the water addition process with the stirring action, in order to overcome the above-mentioned defects of the existing technology. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dolomite mortar preparation process and apparatus.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A process for preparing dolomite mortar includes the following steps: S1. Modification treatment of dolomite; S11. Crush the dolomite and then grind it into dolomite powder using a grinder. S12. Prepare the following raw materials: cement, dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining and thickening agent, air-entraining agent, modifier, and water; S2, Dry mixing of raw materials; S21. Add cement, modified dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining thickener, air-entraining agent, and modifier to the mixing equipment in sequence to make the raw materials mix evenly. The mixing equipment includes a mixing tank, which contains a shaft assembly, and the shaft assembly is equipped with a mixing component A and a mixing component B. The shaft assembly includes a shaft sleeve A, a shaft sleeve B passing through the shaft sleeve A, and a water cavity between the inner wall of shaft sleeve A and the outer wall of shaft sleeve B. A fixed gear is provided inside the shaft sleeve B, and a water injection component is provided outside the shaft sleeve B and sleeved on the top of the shaft sleeve A. The shaft sleeve A and shaft sleeve B are rotatably connected to the water injection component through a sealed bearing. A transmission assembly is provided outside the shaft sleeve A. The stirring assembly A includes a stirring rod A connected to the outside of a shaft cylinder A. Inside the stirring rod A are a shaft hole, a receiving cavity A, and a receiving cavity B, all connected and aligned horizontally. A rotating shaft is located in the shaft hole, with a gear A and a transmission head at each end. A return spring A4 and the stirring rod B are connected in receiving cavities A and B. The return spring A4 is sleeved on the rotating shaft, with its two ends rotatably connected to opposite ends of receiving cavity A and stirring rod B. One end of the stirring rod A is rotatably connected to a movable end, and the other end of the stirring rod A has multiple water holes B distributed circumferentially around the shaft hole, with the water holes B4 communicating with receiving cavity A. The shaft cylinder A also has water holes A and... Water hole B is connected. The end of stirring rod A away from the return spring A is movably inserted into the movable end. Stirring rod B has a protruding edge on the outside, which is located in the receiving cavity B. A transmission cavity is opened in stirring rod B, and a slot is opened at one end of the transmission cavity to cooperate with the transmission head. The part of the rotating shaft with the transmission head is located in the transmission cavity, and the end of the rotating shaft with gear A passes through the shaft cylinder A and shaft cylinder B. The fixed gear includes multiple columns arranged from top to bottom in the shaft cylinder, and the top of the column is provided with spacer teeth near the edge. Gear A meshes with the spacer teeth. Adjacent columns are connected through the same connecting shaft. The top of the connecting shaft passes through the shaft cylinder B and is connected to a locking disc. The locking disc is connected to the top of the mixing tank. The stirring assembly B includes two stirring drums connected to the shaft cylinder A. Each stirring drum is equipped with a displacement rod, which is positioned and engaged with the stirring drum by a floating clamp. The same agitator is located at one end of each displacement rod. S3. Raw materials are mixed with water; S31. Slowly add water and mix wet to obtain a uniform dolomite mortar.

[0009] This invention achieves intelligent switching between "directional mixing" and "disordered mixing" through the intermittent meshing structure of gear A and spacer teeth in the mixing component A, combined with the extension and rotation of the water-pressure driven mixing rod B. This generates strong shear force and turbulence, effectively breaking up raw material agglomeration, solving the problem of mixing dead zones, and significantly improving mixing uniformity and efficiency. At the same time, it innovatively integrates the water addition process with the mixing action, using the same water supply system to drive the mixing rod B to extend and spray water synchronously, achieving the process effect of "mixing and wetting simultaneously, adding water while mixing," avoiding local over-wetting and clumping, shortening the wet mixing time, and ensuring the workability and stability of the mortar. In addition, the equipment integrates axial, radial, and bottom scraper mixing to construct a three-dimensional composite mixing flow field. In particular, the combined revolution and rotation of the mixing component B achieves full-range, dead-zone-free mixing, ensuring the uniformity and stability of product quality.

[0010] Preferably, the movable end face has a through displacement hole, and the inner wall of the displacement hole has two opposing protrusions. The stirring rod B slides in the displacement hole, the protrusion slides in the protrusion, and the water outlet passes through the protrusion.

[0011] Preferably, the bottom end of the connecting shaft in the fixed gear is connected to a discharge component, and the discharge component includes the discharge shaft and the discharge spiral disposed outside the discharge shaft; The transmission assembly includes a gear disc and a transmission rack. The gear disc is sleeved outside the shaft sleeve A and locked to the shaft sleeve A without rotating. The transmission rack includes a transmission gear and a transmission rod. One end of the transmission rod is connected to the output shaft of the drive motor through a coupling. The transmission gear is connected to the other end of the transmission rod and meshes with the gear disc. The mixing tank includes a tank body, a discharge pipe connected to the bottom of the tank body, a tank cover on the top of the tank body, a feed hopper connected to the top of the tank cover, and an outer protective cylinder connected to the top of the tank cover, which covers and encloses the location of the transmission component and the water injection component. The water injection component includes a water inlet connector and a water inlet sealing cylinder. The water inlet connector is connected to the outside of the water inlet sealing cylinder and is connected to a water supply pipe. The sealing cylinder is sleeved outside the shaft cylinder B and covers the top of the shaft cylinder A.

[0012] Preferably, the mixing drum has a through hole, and the floating clamp includes a sealing cover and a floating clamp cylinder. The sealing cover is connected to the top of the mixing drum and covers the through hole. The floating clamp cylinder is T-shaped and hollow at the bottom end, and has a buoyancy ring inside. The floating clamp cylinder is inserted into the through hole. A return spring B is provided between the top of the floating clamp cylinder and the top of the inner part of the sealing cover. The two ends of the return spring B are respectively pressed against the top of the floating clamp cylinder and the top of the inner part of the sealing cover.

[0013] Preferably, the displacement rod has a conical hole, a collection hole, and a straight hole that are connected and kept on the same axis. One end of the displacement rod is connected to a positioning cylinder. The displacement rod also has a positioning hole that connects to the collection hole. The positioning hole and the through hole are connected to each other. The straight hole connects to the inside of the positioning cylinder. The conical hole connects to the water cavity between shaft cylinder A and shaft cylinder B. The water cavity is connected to the inside of the positioning cylinder through the conical hole, the collection hole, and the straight hole. A return spring C is provided in the conical hole. One end of the return spring C is connected to the inside of the stirring cylinder, and the other end of the return spring C is connected to the conical hole. The top and bottom of the positioning cylinder are both connected to positioning covers by bolts.

[0014] Preferably, the agitator includes a rotating cylinder, with both ends of the rotating cylinder being inserted through two positioning cylinders respectively. The positioning cover is fitted over the outside of the rotating cylinder. The rotating cylinder has water inlet holes, nozzles, and blades. There are multiple sets of water inlet holes that extend into the interior of the rotating cylinder. The rotating cylinder with water inlet holes is located in the positioning cylinder. There are multiple nozzles that are vertically connected to the rotating cylinder. The two blades are arranged opposite each other and connected to the rotating cylinder.

[0015] Preferably, a gear B is provided on the rotating cylinder near the top, and an internal gear ring is provided on the inner wall of the cylinder near the top.

[0016] Preferably, a stirring assembly C is connected to the shaft cylinder B, and there is at least one stirring assembly C located at the bottom end of the shaft cylinder A. The stirring assembly C includes a stirring rod C connected to the shaft cylinder B, and a shovel plate arranged in an inclined state is connected to the stirring rod C. The side of the shovel plate away from the stirring rod C contacts the bottom end of the barrel body by static friction. A trapezoidal opening is provided on the shovel plate, with a larger diameter at the front and a smaller diameter at the rear in the direction of advancement.

[0017] Preferably, a hopper is fitted around the outside of the shaft cylinder A, and the hopper is connected to the shaft cylinder A through a connector. The surface of the hopper has several discharge ports, and the inner wall of the hopper has three sets of overlapping blocks arranged in three layers. Each of the three overlapping blocks in the hopper has a layered ring.

[0018] Preferably, a material distribution plate is also sleeved on the outside of the shaft cylinder A and located below the hopper. A material distribution groove is opened on the top of the material distribution plate, and a material distribution port is opened through the top of the material distribution plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention achieves dynamic, multimodal intelligent mixing, significantly improving mixing uniformity and efficiency. Through the intermittent meshing structure of gear A and spaced teeth in the mixing component A, combined with the extension and rotation mechanism of the water-pressure driven mixing rod B, the mixing component can intelligently and cyclically switch between "directional mixing" and "disordered mixing" modes. This dynamically changing mixing method can generate strong shear force and turbulence, effectively breaking up raw material agglomeration and preventing clumping. It solves the problem of mixing dead zones caused by the fixed flow field in traditional mixers. In addition, compared with powder mixing, the extension of the mixing rod B expands the contact surface with the fluid through the convex edge, providing greater shear turbulence during slurry mixing. Compared with single-mode mixing, this invention achieves more macroscopic uniform dispersion and more microscopic component fusion, thereby significantly improving the homogenization degree and product consistency of dolomite mortar.

[0020] 2. This invention innovatively integrates the water addition process with the stirring action, achieving a highly efficient and uniform wet mixing process. After dry mixing is completed, the same water supply system drives the stirring rod B to extend and spray water synchronously from the movable end. This design allows water to be directly introduced into the high-speed moving raw material particles in the form of a fine stream at the source of the stirring action, achieving the process effect of "stirring and wetting simultaneously, adding water while mixing". This method completely avoids the problems of local over-wetting, clumping or powder flying that may be caused by centralized water addition from the top in traditional processes. The water can quickly and evenly diffuse into the dry mix, greatly shortening the wet mixing time, improving production efficiency, and ensuring that the mortar has excellent workability and stability.

[0021] 3. This invention constructs a three-dimensional, full-range composite mixing flow field, ensuring mixing without dead angles. The mixing equipment integrates axial mixing (mixing component A), radial mixing (mixing component B and agitator), and bottom scraper (mixing component C), forming a three-dimensional composite mixing flow field covering the entire volume of the mixing tank. In particular, the blades in mixing component B generate a composite motion of revolution and rotation under the meshing of gear B and internal gear ring, which not only enhances the mixing effect in the central area, but also effectively scrapes and mixes the material near the tank wall. This full-range, dead-angle-free mixing method ensures that all raw materials from the core area to the boundary area can participate in efficient convection and diffusion, thereby ensuring the uniformity and stability of the quality of each batch of products.

[0022] 4. Dolomite mortar prepared according to the formula of this invention: Strength performance: The interfacial bonding force between modified dolomite powder and cement and other components is greatly enhanced, the compressive strength of the mortar can reach a high value, the flexural strength can also reach a good level, and the long-term strength stability is good. Performance: The synergistic effect of high-efficiency water-reducing agent and water-retaining thickener gives the mortar good fluidity, spreadability and excellent water retention. It is not easy to separate or bleed during construction, and it is easy to carry out construction. Durability: The micro-bubbles introduced by the air-entraining agent improve the mortar's freeze resistance and impermeability, while also providing good resistance to corrosive media such as acids and alkalis, effectively extending the mortar's service life. Cost and Environmental Protection: By making reasonable use of dolomite resources, the cost of modifiers and additives is relatively low, and the production process is environmentally friendly, which is in line with the development trend of green building. Attached Figure Description

[0023] Figure 1 This is a flow chart of a dolomite mortar preparation process proposed in this invention; Figure 2 for Figure 1 Schematic diagram of the external structure of the mixing equipment; Figure 3 for Figure 1 Schematic diagram of the internal structure of the mixing equipment; Figure 4 for Figure 2 A structural breakdown diagram of the mixing tank; Figure 5 for Figure 3 Layout diagram of the water injection component and shaft assembly; Figure 6 for Figure 3 Schematic diagram of the mixing assembly A and the shaft assembly; Figure 7 for Figure 6 A cross-sectional view of stirring rod A in stirring assembly A; Figure 8 for Figure 7 The structural breakdown diagram in the text; Figure 9 for Figure 8 Exploded view of stirring rod B, rotating shaft, and return spring A; Figure 10 for Figure 9 Cross-sectional view of stirring rod B; Figure 11 for Figure 6 Separation diagram of central shaft cylinder A, shaft cylinder B, and fixed gear; Figure 12 for Figure 11 Cross-sectional view of the central shaft cylinder A and the stirring cylinder; Figure 13 for Figure 12 Sectional view of the mid-displacement rod; Figure 14 for Figure 13 Structural breakdown diagram of the floating card component; Figure 15 for Figure 13 A split view of the return spring C and the displacement rod; Figure 16 for Figure 3 Schematic diagram of the structure of the central hopper and the distribution plate; Figure 17 for Figure 16 A schematic diagram of the structure viewed from below. Figure 18 for Figure 16 A breakdown diagram of the intermediate layer ring and the hopper.

[0024] In the diagram: 1. Shaft assembly; 11. Shaft cylinder A; 111. Water hole A; 12. Shaft cylinder B; 13. Fixed gear; 131. Column; 1311. Spacer teeth; 132. Connecting shaft; 133. Locking disc; 2. Stirring assembly A; 21. Stirring rod A; 211. Shaft hole; 212. Receiving cavity A; 213. Receiving cavity B; 214. Water hole B; 22. Stirring rod B; 221. Protruding edge; 222. Transmission cavity; 23. Rotating shaft; 231. Gear A; 232. Transmission head; 24. Return spring A; 25. Movable end; 251. Displacement hole; 252. Groove; 3. Stirring assembly B; 31. Stirring cylinder; 311. Through hole; 32. Displacement rod; 321. Tapered hole; 322. Collection hole; 3221. Positioning hole; 323. Straight hole; 324. Positioning cylinder; 325. Positioning cover; 33. Agitator; 331. Rotating cylinder; 3311. Water inlet; 3312. Nozzle; 332. Blade; 34. Floating clamp; 341. Sealing cover; 342. Floating clamp; 343. Return spring B; 35. Return spring C; 36. Gear B; 37. Internal gear ring; 4. Agitator assembly C; 41. Agitator rod C; 42. Shovel plate; 421. Trapezoidal... 5. Discharge component; 6. Transmission assembly; 61. Gear disc; 62. Transmission rack; 7. Mixing tank; 71. Tank body; 72. Discharge pipe; 73. Tank lid; 731. Feed hopper; 74. Outer protective cylinder; 8. Water injection component; 9. Discharge hopper; 91. Discharge port; 92. Layering ring; 921. Overlap block; 93. Connector; 10. Distribution plate; 101. Distribution trough; 102. Distribution port. Detailed Implementation

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Reference Figure 1 A process for preparing dolomite mortar includes the following steps: S1. Modification treatment of dolomite; S11. Crush the dolomite and then grind it into dolomite powder using a grinder. S12. Prepare the following raw materials: cement, dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining thickener, air-entraining agent, modifier, and water. The materials work together to achieve excellent results in terms of strength, workability, and durability, while also taking into account cost and environmental protection. Cement, as a cementing material, provides the basic bonding force and strength foundation for mortar; After modification, the interfacial bonding force between modified dolomite powder and components such as cement is greatly enhanced, which can significantly improve the strength and durability of mortar. Fly ash fills the gaps between cement particles, improving the workability and density of mortar, while reducing cement usage, saving costs, and improving the durability of mortar. High-efficiency water-reducing agents reduce water consumption, improve mortar fluidity and strength, and enhance workability; Water-retaining and thickening agents retain moisture in mortar, prevent bleeding, improve the water retention and cohesiveness of mortar, and facilitate construction; Air-entraining agents introduce tiny, uniform air bubbles, improving the mortar's frost resistance and impermeability, while also enhancing its workability. Modifiers are used to modify dolomite, enhancing its compatibility and reactivity with other components, thereby further improving the performance of the mortar. S2, Dry mixing of raw materials; S21. Add cement, modified dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining thickener, air-entraining agent, and modifier to the mixing equipment in sequence to make the raw materials mix evenly. S3. Raw materials are mixed with water; S31. Slowly add water and mix wet to obtain a uniform dolomite mortar.

[0030] Reference Figure 2-18 A mixing device for preparing dolomite mortar includes a mixing tank 7, a shaft assembly 1 within the mixing tank 7, and a mixing component A2 and a mixing component B3 mounted on the shaft assembly 1. The shaft assembly 1 includes a shaft cylinder A11, through which a shaft cylinder B12 is inserted. The bottom end of the shaft cylinder A11 is sealed, while the bottom end of the shaft cylinder B12 extends through and beyond the bottom end of the shaft cylinder A11, and the two are connected together. A water cavity exists between the inner wall of the shaft cylinder A11 and the outer wall of the shaft cylinder B12. A fixing tooth 13 is provided inside the shaft cylinder B12. B12 is equipped with a water injection component 8 and is sleeved on the top of the shaft cylinder A11. The shaft cylinder A11 and shaft cylinder B12 are rotatably connected to the water injection component 8 through a sealed bearing. The water injection component 8 is connected to the external water supply pipe. When the external water supply equipment starts to supply water, water is injected into the water cavity between the shaft cylinder A11 and shaft cylinder B12 through the water supply pipe. The shaft cylinder A11 is equipped with a transmission assembly 6. The transmission assembly 6 is used to transmit the power of the external drive equipment to the shaft rod assembly 1 and drive the shaft cylinder A11 to rotate. The shaft cylinder A11 can also drive the shaft cylinder B12 to rotate. The stirring assembly A2 includes a stirring rod A21 connected to the outside of the shaft cylinder A11. The stirring rod A21 has a shaft hole 211, a receiving cavity A212, and a receiving cavity B213 that are connected and maintain the same horizontal axis. A rotating shaft 23 is provided in the shaft hole 211, and a gear A231 and a transmission head 232 are respectively provided at both ends of the rotating shaft 23. A reset spring A24 and a stirring rod B22 are connected in the receiving cavity A212 and the receiving cavity B213. The reset spring A24 is sleeved on the rotating shaft 23, and the two ends of the reset spring A24 are rotatably connected to the opposite ends of the receiving cavity A212 and the stirring rod B22, respectively. The reset spring A24 and the stirring rod B22 are rotatably connected, and the reset spring A24 is located in the receiving cavity A212. In the initial state of the stirring rod B22, one end of the stirring rod B22 connected to the return spring A24 is located in the receiving cavity A212. One end of the stirring rod A21 is rotatably connected to a movable end 25, which has a water outlet hole on its outside. The water outlet hole allows water entering the receiving cavity A212 and the receiving cavity B213 to be discharged. The other end of the stirring rod A21 has multiple water holes B214 distributed circumferentially around the shaft hole 211, and the water holes B214 are connected to the receiving cavity A212. The shaft cylinder A11 has a water hole A111 that is connected to the water holes B214. Water enters the receiving cavity A212 through the interconnected water holes A111 and B214. The end of the stirring rod A21 away from the return spring A24 is movably inserted into the movable end 25. The stirring rod B22 has a protruding edge 221 on the outside, which is located in the receiving cavity B213. A transmission cavity 222 is opened in the stirring rod B22, and a slot is opened at one end of the transmission cavity 222 to cooperate with the transmission head 232. The part of the rotating shaft 23 with the transmission head 232 is located in the transmission cavity 222, and the end of the rotating shaft 23 with the gear A231 passes through the shaft cylinder A11 and the shaft cylinder B12. The fixed gear 13 includes a plurality of columns 131 arranged from top to bottom in the shaft cylinder B12. There is a gap between the column 131 and the shaft cylinder B12 to prevent the shaft cylinder B12 from rotating with the shaft cylinder A11. The column 131 will not rotate inside the shaft cylinder B12. The top of the column 131 is provided with a spacer tooth 1311 near the edge. The spacer tooth 1311 is arranged on the top of the column 131 and is incomplete. When the gear A231 meshes with the spacer tooth 1311, it meshes sometimes and does not mesh at all. In this way, the rotating shaft 23 can rotate freely at times and is driven to rotate at other times. Adjacent columns 131 are connected by the same connecting shaft 132. The top of the connecting shaft 132 passes through the shaft cylinder B12 and is connected to a locking disc 133. The connecting shaft 132 is not movable. The locking disc 133 is connected to the top of the mixing tank 7 to ensure that the connecting shaft 132 does not rotate. The stirring assembly B3 includes two stirring drums 31, which are connected to the shaft cylinder A11 and are in communication with each other. Each stirring drum 31 is provided with a displacement rod 32, which is positioned and locked to the stirring drum 31 by a floating clamp 34, so that the displacement rod 32 will not move in the stirring drum 31. One end of the two displacement rods 32 is provided with the same stirring element 33.

[0031] Reference Figure 2-18A mixing device for preparing dolomite mortar, in the dry mixing process: raw materials are sequentially injected into the barrel 71 through the feed hopper 731. The drive device (motor) drives the shaft cylinder A11 and shaft cylinder B12 to rotate through the transmission component 6. The rotation of shaft cylinder A11 drives the stirring rod A21 to rotate. At the same time, the rotation of shaft cylinder A11 drives the two stirring cylinders 31 and one agitator 33 to rotate in the barrel 71. Thus, the stirring rod A21, stirring cylinders 31 and agitator 33 are used to mix the various raw materials evenly in the barrel 71. In addition, when shaft cylinder A11 and shaft cylinder B12 rotate, they rotate with the fixed gear 13 as the rotation axis. Therefore, when the rotating shaft 23 is driven to rotate by shaft cylinder A11 and shaft cylinder B12, the gear A231 on one end of the rotating shaft 23 in shaft cylinder B12 and the spacer teeth 1311 maintain a cycle of meshing, disengaging, meshing, and disengaging. Wet mixing process: After the raw materials are dry-mixed and evenly mixed, water is injected into the water chamber through the water injection component 8 via an external water supply device. After the water chamber is filled with water, it enters the water hole B214 through the water hole A111, and then enters the receiving cavity A212 where the return spring A24 is located through the water hole B214. As the water continues to fill and generate pressure, the pressure increases, and the water pressure squeezes one end of the stirring rod B22, pushing one end of the stirring rod B22 away from the receiving cavity A212 and moving it to the receiving cavity B213. At the same time, the stirring rod B22 slides outside the rotating shaft 23 and stretches the return spring A24. The stirring rod B22 and the protrusion 221 move and extend through the movable end 25. When the stirring rod B22 is squeezed and pushed to the limit position by the water pressure, the transmission head 232 engages with the slot, and thus the rotation... Shaft 23 is connected to stirring rod B22. When gear A231 is engaged with spacer teeth 1311, the rotating shaft 23 drives stirring rod B22 to rotate. Stirring rod B22 drives convex edge 221 to rotate, so that the rotation of convex edge 221 changes to a fixed angle. Then, in the cycle state, gear A231 and spacer teeth 1311 are not engaged. In this way, under the impact force of rotation and stirring, the rotating shaft 23 and stirring rod B22 can rotate freely. This forms convex edge 221 stirring the raw materials in barrel 71 at an indefinite tilt angle. When water squeezes stirring rod B22, water enters the receiving cavity B213 and is sprayed out from the movable end 25 through the water outlet. At this time, stirring rod B22 and convex edge 221 are wet-mixed with water.

[0032] Reference Figure 2-18A mixing device for preparing dolomite mortar, wherein a displacement hole 251 is provided through the end face of the movable end 25, and two opposing protrusions 252 are provided on the inner wall of the displacement hole 251. The mixing rod B22 is slidably fitted in the displacement hole 251, and the protrusion 221 is slidably fitted in the protrusion 252. The water outlet is through the protrusion 252. When the mixing rod B22 rotates, the mixing rod B22 drives the protrusion 221 to rotate in the receiving cavity B213. At the same time, the protrusion 221 drives the movable end 25 to rotate at the end of the mixing rod B21. After rod B22 moves to its limit position, the end of the protrusion 221 near the return spring A24 is located in the groove 252, and the water outlet is also exposed to facilitate water to enter the tank 71. When the water pressure decreases or even disappears, the reset effect of the return spring A24 pulls the stirring rod B22 back, causing the stirring rod B22 to move in the receiving cavity B213, and the end of the stirring rod B22 connected to the return spring A24 moves into the receiving cavity A212, and the stirring rod B22 and the protrusion 221 retract into the movable end 25.

[0033] Reference Figure 2-18 A mixing device for preparing dolomite mortar, wherein a discharge component 5 is connected to the bottom end of the connecting shaft 132 in the fixed toothed component 13, and the discharge component 5 includes a discharge shaft and a discharge screw set outside the discharge shaft. The discharge component 5 is located in the discharge pipe 72. The rotation of the shaft cylinder A11 and the shaft cylinder B12 drives the discharge component 5 to rotate, specifically driving the discharge shaft to rotate in the discharge pipe 72. The discharge shaft drives the discharge screw to assist in the discharge of the mixed material in the barrel 71. The transmission assembly 6 includes a gear disc 61 and a transmission rack 62. The gear disc 61 is sleeved on the outside of the shaft cylinder A11 and locked to the shaft cylinder A11 without rotating. The transmission rack 62 includes a transmission gear and a transmission rod. One end of the transmission rod is connected to the output shaft of the drive motor through a coupling. The transmission gear is connected to the other end of the transmission rod and meshes with the gear disc 61. When the drive motor rotates, it drives the transmission rod to rotate. The transmission rod drives the transmission gear to rotate. The transmission gear drives the gear disc 61 that meshes with it to rotate. The gear disc 61 drives the shaft cylinder A11 to rotate. The shaft cylinder A11 passes through the bucket cover 73 and is rotatably connected to the bucket cover 73. The mixing tank 7 includes a tank body 71. The bottom of the tank body 71 is connected to a discharge pipe 72. The discharge pipe 72 has a control valve that can control the closing state of the discharge pipe 72. The top of the tank body 71 is provided with a tank cover 73. The top of the tank cover 73 is connected to a feed hopper 731. The top of the tank cover 73 is connected to an outer protective cylinder 74. The outer protective cylinder 74 covers the location of the transmission component 6 and the water injection component 8. The top of the connecting shaft 132 passes through the outer protective cylinder 74, and the locking disc 133 on it is locked to the top of the outer protective cylinder 74 by bolts. In this way, neither the connecting shaft 132 nor the column 131 can rotate. Water injection component 8 includes a water inlet connector and a water inlet sealing cylinder. The water inlet connector is connected to the outside of the water inlet sealing cylinder and is connected to a water supply pipe. The sealing cylinder is sleeved outside the shaft cylinder B12 and covers the top of the shaft cylinder A11. When water is injected through the water supply pipe, the water reaches the sealing cylinder and enters the water cavity.

[0034] Reference Figure 2-18 A mixing device for preparing dolomite mortar includes a mixing drum 31 with a through hole 311 extending into the interior of the mixing drum 31. A floating clamp 34 includes a sealing cap 341 and a floating clamp 342. The sealing cap 341 is connected to the top of the mixing drum 31 and covers the through hole 311. The floating clamp 342 is T-shaped, with a hollow bottom end and a buoyancy ring inside. When the floating clamp 342 is inserted into the through hole 311, the top of the floating clamp 342 is at the top of the mixing drum 31 and inside the sealing cap 341, while the bottom portion of the floating clamp 342 is inserted into the mixing drum. In section 31, a return spring B343 is provided between the top of the floating clamp 342 and the top of the inner part of the sealing cover 341. The two ends of the return spring B343 are pressed against the top of the floating clamp 342 and the top of the inner part of the sealing cover 341, respectively. The return spring B343 can press the floating clamp 342 downward to keep the top end close to the top of the stirring tube 31. In the initial state, the displacement rod 32 is located in the stirring tube 31, and the positioning hole 3221 corresponds to the through hole 311. The bottom part of the floating clamp 342 is inserted into the positioning hole 3221 from the through hole 311, thereby restricting and positioning the displacement rod 32 in the stirring tube 31.

[0035] Reference Figure 2-18 A mixing device for preparing dolomite mortar, wherein a displacement rod 32 has a conical hole 321, a collection hole 322 and a straight hole 323 that are connected and kept on the same axis, and one end of the displacement rod 32 is connected to a positioning cylinder 324. The displacement rod 32 also has a positioning hole 3221 that connects to the collection hole 322. The positioning hole 3221 is connected to the through hole 311. The straight hole 323 connects to the inside of the positioning cylinder 324. The conical hole 321 connects to the water cavity between the shaft cylinder A11 and the shaft cylinder B12. The water cavity is connected to the inside of the positioning cylinder 324 through the conical hole 321, the collection hole 322 and the straight hole 323. A return spring C35 is provided in the conical hole 321. One end of the return spring C35 is connected to the inside of the mixing cylinder 31 and the other end of the return spring C35 is connected to the conical hole 321. The top and bottom ends of the positioning cylinder 324 are both connected to the positioning cover 325 by bolts. When water enters the stirring cylinder 31 from the water chamber, it surges to the conical hole 321 after passing through the return spring C35, and then enters the collection hole 322 and the straight hole 323, further entering the positioning cylinder 324. During this process, because the inlet diameter is larger than the outlet diameter, the water pressure can continue to accumulate in the conical hole 321, and then enter the collection hole 322. Because the diameter of the straight hole 323 is smaller than that of the collection hole 322, the water will continue to fill the collection hole 322. The buoyancy and pressure of the water push the positioning cylinder 324 upward, causing the positioning cylinder 324 to move upward in the positioning hole 3221 and the through hole 311 until the bottom of the positioning cylinder 324 leaves. Positioning hole 3221 is connected to through hole 311. At this time, positioning cylinder 324 does not position displacement rod 32, so displacement rod 32 can also move. Water pressure is used to squeeze displacement rod 32. When pushing the two displacement rods 32 to move and extend out in mixing cylinder 31, the two displacement rods 32 drive rotating cylinder 331 away from mixing cylinder 31. Blade 332 approaches and contacts inner wall of barrel 71 by static friction. At the same time, water entering positioning cylinder 324 enters rotating cylinder 331 through water inlet hole 3311 and is sprayed out from nozzle 3312. In addition, blade 332 can not only be used to wet mix raw materials in barrel 71, but also to clean and scrape inner wall of barrel 71.

[0036] Reference Figure 2-18 A mixing device for preparing dolomite mortar includes a mixing component 33 comprising a rotating cylinder 331. Both ends of the rotating cylinder 331 are sealed to maintain a hollow interior. Both ends of the rotating cylinder 331 are respectively inserted into two positioning cylinders 324. Positioning caps 325 are fitted over the rotating cylinder 331 and are rotatably connected to it. The rotating cylinder 331 has multiple sets of water inlets 3311 that extend through the rotating cylinder 331. Inside 31, the rotating cylinder 331 has a water inlet hole 3311 located in the positioning cylinder 324. There are multiple nozzles 3312 connected vertically to the rotating cylinder 331. Two blades 332 are arranged opposite each other and connected to the rotating cylinder 331. When the shaft cylinder A11 and shaft cylinder B12 rotate, they drive the stirring cylinder 31, the displacement rod 32 and the rotating cylinder 331 to rotate. The rotating cylinder 331 drives the blades 332 on it to rotate, so that the raw materials are stirred evenly through the stirring cylinder 31, the displacement rod 32, the rotating cylinder 331 and the blades 332.

[0037] Reference Figure 2-18A mixing device for preparing dolomite mortar includes a gear B36 located near the top of a rotating drum 331 and an internal gear ring 37 located near the top of the inner wall of a barrel 71. When a displacement rod 32 moves within the mixing drum 31 and drives the rotating drum 331 to move, the gear B36 on the rotating drum 331 meshes with the internal gear ring 37. Thus, when the rotating drum 331 rotates in a circular motion within the barrel 71, the meshing of gear B36 and internal gear ring 37 allows the rotating drum 331 to rotate on its own axis while rotating around a shaft A11. This means the rotating drum 331 drives the blade 332. The rotating cylinder performs mixing operations, while the nozzle 3312 sprays water into the barrel 71, thus adding water while stirring. In addition, the nozzle 3312 can also be used to spray water to clean the inner wall of the barrel 71. When water is not sprayed, and the water level drops or even disappears, the return spring C35 returns to its original position and pulls the displacement rod 32 back into the mixing drum 31, so that the rotating drum 331 is close to the end of the mixing drum 31. When the positioning hole 3221 corresponds to the through hole 311, the floating clamping cylinder 342 falls heavily from the through hole 311 and clamps into the positioning hole 3221 under the action of the return spring B343, keeping the displacement rod 32 immovable in the mixing drum 31.

[0038] Reference Figure 2-18 A mixing device for preparing dolomite mortar includes a mixing assembly C4 connected to a shaft cylinder B12. At least one mixing assembly C4 is located at the bottom end of the shaft cylinder A11. The mixing assembly C4 includes a mixing rod C41 connected to the shaft cylinder B12, and a shovel plate 42 arranged in an inclined state is connected to the mixing rod C41. The side of the shovel plate 42 away from the mixing rod C41 contacts the bottom end of the inner wall of the barrel 71 by static friction. The shovel plate 42 has a trapezoidal opening 421. The front diameter of the trapezoidal opening 421 is larger than the rear diameter in the forward direction. When the shaft cylinder A11 and the shaft cylinder B12 rotate, the shaft cylinder B12 drives the mixing rod C41 to rotate. The mixing rod C41 drives the shovel plate 42 to lift the raw material, and at the same time, the raw material passing through the trapezoidal opening 421 is turned over.

[0039] Reference Figure 2-18A mixing device for preparing dolomite mortar includes a hopper 9 fitted around a shaft cylinder A11, connected to the shaft cylinder A11 via a connector 93. The hopper 9 has several discharge ports 91 on its surface. The inner wall of the hopper 9 has three sets of overlapping blocks 921 arranged in three layers. Each of the three overlapping blocks 921 has a layered ring 92. The overlapping blocks 921 and the layered rings 92 are bolted together. The three layered rings 92 are located within the hopper 9. Arranged from top to bottom, the diameters and inner diameters of the three layered rings 92 decrease sequentially from top to bottom. The connecting piece 93 is connected to the three layered rings 92. When the shaft cylinders A11 and B12 rotate, the connecting piece 93 drives the throwing hopper 9 to rotate. When the raw material falls into the throwing hopper 9, it lands on the three layered rings 92 and the inner wall of the throwing hopper 9. When the throwing hopper 9 rotates, the raw material in the throwing hopper 9 is thrown out from the throwing port 91 to achieve the effect of dispersing the raw material.

[0040] Reference Figure 2-18 A mixing device for preparing dolomite mortar includes a distribution plate 10 fitted around the outside of a shaft cylinder A11 and located below a throwing hopper 9. The top of the distribution plate 10 has a distribution groove 101, and the top of the distribution plate 10 has a through-hole distribution port 102. Some raw materials falling into the throwing hopper 9 are thrown out, while some continue to fall onto the distribution plate 10. When the shaft cylinder A11 rotates, causing the distribution plate 10 to rotate, the raw materials falling into the distribution groove 101 and the distribution port 102 are thrown out and dispersed. The above embodiment is a preferred embodiment of the present invention, but the embodiments of the present invention are not limited to the above embodiment. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. A dolomite mortar preparation device, characterized in that, Including mixing equipment, The mixing equipment includes a mixing tank (7), a shaft assembly (1) is provided in the mixing tank (7), and a stirring component A (2) and a stirring component B (3) are provided on the shaft assembly (1). The shaft assembly (1) includes a shaft cylinder A (11), a shaft cylinder B (12) is provided through the shaft cylinder A (11), and there is a water cavity between the inner wall of the shaft cylinder A (11) and the outer wall of the shaft cylinder B (12). A fixed gear (13) is provided inside the shaft cylinder B (12), and a water injection component (8) is provided outside the shaft cylinder B (12) and sleeved on the top of the shaft cylinder A (11). The shaft cylinder A (11) and the shaft cylinder B (12) are rotatably connected to the water injection component (8) through a sealed bearing. A transmission assembly (6) is provided outside the shaft cylinder A (11). The stirring assembly B (3) includes two stirring drums (31), which are connected to the shaft cylinder A (11). Each of the two stirring drums (31) is provided with a displacement rod (32), which is positioned and engaged with the stirring drum (31) by a floating clamp (34). One end of each of the two displacement rods (32) is provided with the same agitator (33). A through hole (311) is provided on the stirring drum (31). The floating clamp (34) includes a sealing cover (341) and a floating clamp (342). The sealing cover (341) is connected to the top of the stirring drum (31) and covers the through hole (311). The floating clamp (342) is T-shaped and the bottom of the floating clamp (342) is hollow and has a buoyancy ring inside. The floating clamp (342) is inserted into the through hole (311). A return spring B (343) is provided between the top of the floating clamp (342) and the top of the sealing cover (341). The two ends of the return spring B (343) are pressed against the top of the floating clamp (342) and the top of the sealing cover (341) respectively. The displacement rod (32) has a conical hole (321), a collection hole (322), and a straight hole (323) that are connected and kept on the same axis. One end of the displacement rod (32) is connected to a positioning cylinder (324). The displacement rod (32) also has a positioning hole (3221) that connects to the collection hole (322). The positioning hole (3221) is connected to the through hole (311). The straight hole (323) connects to the inside of the positioning cylinder (324). The conical hole (321) connects to the shaft cylinder. The water cavity between A (11) and shaft cylinder B (12) is connected to the interior of positioning cylinder (324) through conical hole (321), collection hole (322) and straight hole (323). A return spring C (35) is provided in conical hole (321). One end of return spring C (35) is connected to the stirring cylinder (31), and the other end of return spring C (35) is connected to conical hole (321). Positioning caps (325) are bolted to the top and bottom of positioning cylinder (324). The agitator (33) includes a rotating cylinder (331), and the two ends of the rotating cylinder (331) are respectively inserted into two positioning cylinders (324). The positioning cover (325) is sleeved on the outside of the rotating cylinder (331). The rotating cylinder (331) has a water inlet hole (3311), a nozzle (3312), and a blade (332). There are multiple sets of water inlets (3311) that penetrate into the interior of the rotating cylinder (331). The rotating cylinder (331) with the water inlet hole (3311) is located in the positioning cylinder (324). There are multiple nozzles (3312) that are vertically connected to the rotating cylinder (331). The two blades (332) are arranged opposite each other and connected to the rotating cylinder (331).

2. The dolomite mortar preparation device according to claim 1, characterized in that, The stirring assembly A (2) includes a stirring rod A (21) connected to the outside of the shaft cylinder A (11), and the stirring rod A (21) has a shaft hole (211), a receiving cavity A (212), and a receiving cavity B (213) that are connected and maintain the same horizontal axis. A rotating shaft (23) is provided in the shaft hole (211), and a gear A (231) and a transmission head (232) are respectively provided at both ends of the rotating shaft (23). A reset spring A (24) and a stirring rod B (22) are connected in the receiving cavity A (212) and the receiving cavity B (213). The reset spring A (24) is sleeved on the rotating shaft (23), and the two ends of the reset spring A (24) are rotatably connected to the opposite ends of the receiving cavity A (212) and the stirring rod B (22). A movable end (25) is rotatably connected to one end of the stirring rod A (21). The other end of the stirring rod A (21) is provided with multiple water holes B (214) centered on the shaft hole (211) and distributed in a circular pattern. The water holes B (214) are connected to the receiving cavity A (212). The shaft cylinder A (11) is provided with water holes A (111) and is connected to the water holes B (214). The end of the stirring rod A (21) away from the return spring A (24) is movably inserted into the movable end head (25). The stirring rod B (22) is provided with a protruding edge (221) on the outside. The protruding edge (221) is located in the receiving cavity B (213). The stirring rod B (22) is provided with a transmission cavity (222). The transmission cavity (222) is provided with a slot at one end and cooperates with the transmission head (232). The rotating shaft (2 3) The part with the transmission head (232) is located in the transmission cavity (222), and the end of the rotating shaft (23) with gear A (231) passes through the shaft cylinder A (11) and shaft cylinder B (12). The fixed gear (13) includes multiple columns (131) arranged from top to bottom in the shaft cylinder B (12), and the top of the column (131) is provided with a spacer tooth (1311) near the edge. Gear A (231) meshes with the spacer tooth (1311). Adjacent columns (131) are connected through the same connecting shaft (132). The top of the connecting shaft (132) passes through the shaft cylinder B (12) and is connected to a locking disc (133). The locking disc (133) is connected to the top of the mixing barrel (7).

3. The dolomite mortar preparation device according to claim 2, characterized in that, The end face of the active end (25) is provided with a displacement hole (251), and the inner wall of the displacement hole (251) is provided with two opposing grooves (252). The stirring rod B (22) slides in the displacement hole (251), the protruding edge (221) slides in the groove (252), and the water outlet passes through the groove (252).

4. The dolomite mortar preparation device according to claim 1, characterized in that, The bottom end of the connecting shaft (132) in the fixed gear (13) is connected to the discharge component (5), and the discharge component (5) includes the discharge shaft and the discharge spiral set outside the discharge shaft; The transmission assembly (6) includes a gear plate (61) and a transmission rack (62). The gear plate (61) is sleeved on the outside of the shaft sleeve A (11) and locked to the shaft sleeve A (11) without rotating. The transmission rack (62) includes a transmission gear and a transmission rod. One end of the transmission rod is connected to the output shaft of the drive motor through a coupling. The transmission gear is connected to the other end of the transmission rod and meshes with the gear plate (61). The mixing tank (7) includes a tank body (71), a discharge pipe (72) is connected to the bottom of the tank body (71), and a tank cover (73) is provided on the top of the tank body (71). A feed hopper (731) is connected to the top of the tank cover (73), and an outer protective cylinder (74) is connected to the top of the tank cover (73). The outer protective cylinder (74) covers the location of the transmission component (6) and the water injection component (8). The water injection component (8) includes a water inlet connector and a water inlet sealing cylinder. The water inlet connector is connected to the outside of the water inlet sealing cylinder and the water inlet connector is connected to the water supply pipe. The sealing cylinder is sleeved outside the shaft cylinder B (12) and covers the top of the shaft cylinder A (11).

5. The dolomite mortar preparation device according to claim 1, characterized in that, A gear B (36) is provided near the top of the rotating cylinder (331), and an internal gear ring (37) is provided near the top of the inner wall of the barrel body (71).

6. The dolomite mortar preparation device according to claim 1, characterized in that, A stirring assembly C (4) is connected to the shaft cylinder B (12), and there is at least one stirring assembly C (4) located at the bottom end of the shaft cylinder A (11). The stirring assembly C (4) includes a stirring rod C (41) connected to the shaft cylinder B (12), and a shovel plate (42) arranged in an inclined state is connected to the stirring rod C (41). The side of the shovel plate (42) away from the stirring rod C (41) contacts the bottom end of the inner wall of the barrel (71) in a static friction manner. A trapezoidal opening (421) is opened on the shovel plate (42), and the front diameter of the trapezoidal opening (421) in the forward direction is large and the rear diameter is small.

7. The dolomite mortar preparation device according to claim 1, characterized in that, A hopper (9) is fitted on the outside of the shaft cylinder A (11), and the hopper (9) is connected to the shaft cylinder A (11) through a connector (93). Several discharge ports (91) are opened on the surface of the hopper (9). Three sets of overlapping blocks (921) are provided on the inner wall of the hopper (9). The three sets of overlapping blocks (921) are arranged in three layers, and layered rings (92) are provided inside the hopper (9) and on the three layers of overlapping blocks (921).

8. The dolomite mortar preparation device according to claim 7, characterized in that, The shaft cylinder A (11) is also fitted with a material distribution plate (10) and located below the hopper (9). The top of the material distribution plate (10) is provided with a material distribution groove (101), and the top of the material distribution plate (10) is provided with a material distribution port (102).

9. A process for preparing dolomite mortar, characterized in that, The preparation of dolomite mortar using the apparatus described in any one of claims 1-8 includes the following preparation steps: S1. Modification treatment of dolomite; S11. Crush the dolomite and then grind it into dolomite powder using a grinder. S12. Prepare the following raw materials: cement, dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining and thickening agent, air-entraining agent, modifier, and water; S2, Dry mixing of raw materials; S21. Add cement, modified dolomite powder, fly ash, high-efficiency water-reducing agent, water-retaining thickener, air-entraining agent, and modifier to the mixing equipment in sequence to make the raw materials mix evenly. S3. Add water to the raw materials and stir. S31. Slowly add water and mix wet to obtain a uniform dolomite mortar.

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