Preparation process of engineering waste soil semi-sintered heat-insulating hollow brick

Abstract

The invention relates to a preparation process of an engineering waste soil semi-sintered heat-insulating hollow brick, and relates to the technical field of hollow brick preparation. The method comprises the following steps: screening waste soil, crushing to remove impurities, efficiently crushing by adopting a specific crushing device and a specific crushing assembly, mixing the waste soil, a binder and a foaming agent in proportion, adding water, uniformly stirring, injecting into a mold for compression molding, airing or drying a green brick at low temperature, sintering and cooling at 600-800 DEG C to obtain a hollow brick finished product. The effect of effectively utilizing the engineering waste soil to prepare the heat-insulating hollow brick is achieved, and the heat-insulating hollow brick is more environment-friendly.

Description

Technical Field

[0001] The present application relates to the field of hollow brick preparation, and in particular to a preparation process of semi-sintered thermal insulation hollow bricks made from engineering waste. Background Art

[0002] Hollow bricks are commonly used in non-load-bearing areas. They have a porosity of at least 40%, with a large, small number of hollow spaces. Hollow bricks are categorized as cement hollow bricks, clay hollow bricks, and shale hollow bricks. Hollow bricks are a common wall material in the construction industry. Due to their lightweight and minimal raw material consumption, they have become the preferred choice of national construction departments.

[0003] Currently, natural clay is commonly used as the main raw material for the preparation of insulating hollow bricks. The preparation process generally involves preliminary screening of the clay to remove impurities such as larger stones, followed by aging to stabilize the clay's performance. A certain amount of water is then added and stirred to give it good plasticity, after which it is extruded and formed into a brick blank. After airing or drying the brick blank, it is placed in a high-temperature kiln for firing. The firing temperature is usually high and the firing time is also long to ensure that the brick reaches sufficient strength. In addition, there are also methods for preparing insulating bricks that use industrial waste residues such as slag and fly ash as part of the raw materials. These methods also require a series of processes such as raw material processing, mixing, molding, and firing.

[0004] However, the existing process for preparing hollow thermal insulation bricks has obvious defects. Using natural clay as the main raw material consumes a large amount of land resources, which is not conducive to the protection of the ecological environment, and thus needs to be improved. Summary of the Invention

[0005] In order to improve the problem that a large amount of land resources are consumed and environmental protection is not conducive when preparing hollow bricks, the present application provides a preparation process of semi-sintered thermal insulation hollow bricks made of engineering waste.

[0006] The preparation process of a semi-sintered thermal insulation hollow brick made from engineering waste provided in this application adopts the following technical solution: A preparation process of semi-sintered heat-insulating hollow bricks from engineering waste soil, comprising the following steps: S1. Screening and crushing of waste soil to remove impurities; S2, mixing waste soil, binder and foaming agent in proportion; S3, add water and stir until uniform; S4, the mixture is injected into the mold and pressed into shape; S5. Dry the bricks naturally or dry them at low temperature; S6. The bricks are sintered at 600-800℃ and cooled to obtain hollow bricks.

[0007] By adopting the above technical solution, the preparation process includes five steps: raw material processing, mixing and stirring, forming, drying, and semi-sintering. In the raw material processing step, construction waste soil is screened and crushed, then mixed with a binder and foaming agent in appropriate proportions. In the mixing and stirring step, the raw materials and water are thoroughly stirred to form a uniform mixture. In the forming step, the mixture is pressed through a mold to form a brick with a hollow structure. In the drying step, the brick is naturally dried or oven-dried at low temperature. In the semi-sintering step, the brick is sintered at 600-800°C to form a semi-sintered, insulated hollow brick. The raw materials here are industrial waste and construction waste soil, which improves waste soil utilization and is more environmentally friendly.

[0008] Optionally, a crushing device is used for crushing in S1, and the crushing device includes a working frame, a crushing box and a crushing assembly, the crushing box is arranged on the working frame, and the crushing assembly is arranged in the crushing box.

[0009] By adopting the above technical solution, the waste soil is poured into the crushing box, and then the crushing component is started to crush the block structure in the waste soil, so that the waste soil raw materials are crushed more finely for subsequent pressing and molding.

[0010] Optionally, the crushing assembly includes a crushing barrel and several spiral rods, the crushing barrel is arranged along the length direction of the crushing box, the crushing barrel is arranged horizontally, and the end of the crushing barrel is rotatably connected to the crushing box, the spiral rod is arranged on the crushing barrel, the spiral rod is perpendicular to the central axis of the crushing rod, and several spiral rods are evenly arranged along the circumference direction of the crushing barrel to form a circle of spiral rod groups, and several spiral rod groups are arranged at intervals along the length direction of the crushing barrel. A rotating motor is provided on the crushing barrel, and the output shaft of the rotating motor is coaxially fixed to one end of the crushing barrel for driving the crushing barrel to rotate.

[0011] By adopting the above technical solution, when waste soil is put into the crushing box, the rotating motor is started to drive the crushing barrel to rotate, driving the screw and the spiral rod to move synchronously. During the movement of the spiral rod, the structure of the screw rod itself, that is, the gap between the spiral blades and the inner wall of the crushing box forms a semi-closed channel, forming a natural shear surface. When the screw rod moves, high-speed shear force is applied to the waste soil in the channel. At the same time, the waste soil is thrown onto the inner wall of the crushing box under the action of the centrifugal force of the revolution, and is pushed by the inclined surface of the spiral blades, resulting in axial displacement, so that the waste soil is continuously compressed during the advancement process, the density increases, and the collision between particles intensifies, thereby achieving crushing.

[0012] Optionally, the crushing barrel is provided with a rotating assembly for driving several spiral rods to rotate, and the rotating assembly includes several fixed gears and several rotating gears. A cavity is provided in the crushing barrel, and the fixed gear is arranged in the cavity. Several of the fixed gears correspond to the spiral rod group one by one, and the fixed gear is coaxial with the crushing barrel and fixed to the crushing box through a fixed rod. Several of the rotating gears correspond to the spiral rod one by one, and the end of the spiral rod is rotatably connected to the crushing barrel. The rotating gear is located in the cavity and fixed coaxially with the spiral rod, and the rotating gear is meshed with the fixed gear.

[0013] By adopting the above technical solution, when the crushing drum drives the spiral rod to make circular motion, the rotating gear moves around the fixed gear. Since the rotating gear and the fixed gear are engaged, the rotating gear rotates, and then the rotating rod rotates, so that the waste soil is simultaneously affected by the centrifugal force of the revolution and the thrust of the self-rotating spiral. The motion trajectory is a spatial spiral compound curve, which greatly extends the effective path of the waste soil in the crushing box, prolongs the waste soil retention time, and the number of repeated squeezing and shearing increases exponentially, thereby achieving a better crushing effect.

[0014] Optionally, a flipping assembly is provided on the working frame, and the flipping assembly includes a driving member and several flipping plates. The driving member is provided on the working frame, and the middle part of the flipping plate is rotatably connected to the working frame through a torsion spring. The flipping plate is located between adjacent spiral rods, and several of the flipping plates are symmetrically arranged with the central axis of the crushing barrel as the axis. The driving member abuts against the flipping rod to drive the flipping rod to rotate.

[0015] By adopting the above technical solution, in the initial state, the flip plate, under the action of the torsion spring, keeps one end of the flip plate submerged in the waste soil. During the crushing process of the crushing assembly, the driving member is activated, driving the flip plate to rotate between adjacent spiral rods. Because the flip plate is located between adjacent spiral rods, it does not interfere with the rotation of the spiral rods. The rotation of the flip plate causes the flip plate to scoop up some waste soil and lift it upward, loosening the waste soil and improving its fluidity, facilitating comprehensive crushing of the waste soil, and thus improving the crushing effect.

[0016] Optionally, the driving member includes a cylinder and a pressure plate, the cylinder is arranged on the workbench, the pressure plate is arranged horizontally, the output shaft of the cylinder is connected to the pressure plate, and is used to drive the pressure plate to move up and down, the pressure plate is located above the flip plate, and the torsion spring is used to drive one end of the flip plate to abut against the pressure plate.

[0017] By adopting the above technical solution, in the initial state, the torsion spring makes one end of the flipping plate located in the crushing box, and the other end abuts against the pressure plate. The cylinder is started to drive the pressure plate downward, thereby pressing one end of the flipping plate, so that the height of the end of the flipping plate is reduced. By utilizing the lever principle, that is, the flipping plate rotates, the other end of the flipping plate moves up synchronously, and drives the waste soil to move up together, thereby realizing the flipping of the waste soil.

[0018] Optionally, two filter plates are provided on the working frame, and the two filter plates are symmetrically arranged with the central axis of the crushing cylinder as the axis. The filter plate is tilted downward at one end close to the crushing cylinder, and a receiving bag is provided below the filter plate, and the receiving bag is located outside the crushing box.

[0019] By adopting the above technical solution, when the waste soil is lifted up by the flipping plate and falls off from the flipping plate, the height of the waste soil at this time can fall on the filter plate. The larger particles in this part of the waste soil will remain on the filter plate, while the waste soil with smaller diameters can pass through the filter plate and enter the receiving bag for storage. The two filter plates receive the waste soil lifted up by the flipping plates on the corresponding sides. Because the filter plates are tilted, the waste soil with larger particles that cannot pass through the filter plates falls back into the crushing box along the filter plates and is crushed again. In this process, not only is the waste soil loosened, but the waste soil can also be screened during the crushing process, so that the crushed waste soil will not always stay in the crushing box, which will interfere with the crushing of the waste soil with large particles. That is, the waste soil to be crushed is continuously reduced during the crushing process, leaving only the waste soil with large particles for crushing, thereby improving the crushing accuracy.

[0020] Optionally, the middle portion of the filter plate is rotatably connected to the work frame, and the work frame is provided with a positioning component, which is connected to the filter plate and is used to fix the filter plate on the work frame.

[0021] By adopting the above technical solution, the filter plate is rotated and the inclination angle of the filter plate is changed, thereby controlling the speed at which the waste soil falling on the filter plate slides back into the crushing box.

[0022] Optionally, the positioning assembly includes a positioning gear and a positioning rack, the positioning gear is coaxially fixed to the filter plate, the positioning delay wheel is rotatably connected to the working frame, the positioning rack is slidably connected to the working frame, and the positioning rack can engage with the positioning gear.

[0023] By adopting the above technical solution, when the filter plate needs to be rotated, the positioning rack is separated from the positioning gear. When the filter plate is rotated, the positioning gear rotates synchronously. When the filter plate's tilt angle is determined, the positioning rack is moved toward the positioning gear until it meshes with the positioning gear. Since the positioning rack cannot move along its own length, the positioning gear cannot rotate, thereby fixing the filter plate angle.

[0024] Optionally, a barrier net is provided on the working frame, and the barrier net is horizontally arranged above the crushing box.

[0025] By adopting the above technical solution, the barrier net plays a shielding role, so that when the flip plate lifts the waste soil, the waste soil will not exceed the height of the barrier net, that is, the waste soil with larger particles will not splash around and hurt the operators, which is safer.

[0026] In summary, this application has at least one of the following beneficial effects: 1. When the crushing drum drives the spiral rod to make circular motion, the rotating gear moves around the fixed gear. The rotating gear and the fixed gear are meshed, causing the rotating gear to rotate, and then the rotating rod to rotate. The waste soil is simultaneously affected by the centrifugal force of the revolution and the thrust of the self-rotating spiral. The motion trajectory forms a spatial spiral compound curve, which greatly extends the effective path of the waste soil in the crushing box, prolongs the waste soil retention time, and multiplies the number of repeated extrusion and shearing, thereby achieving better crushing effect. 2. When the overturning plate lifts up the waste soil, after the waste soil is lifted up, when the waste soil falls off the overturning plate, the height of the waste soil at this time can fall on the filter plate. The larger particles in this part of the waste soil will remain on the filter plate, while the waste soil with smaller diameters can pass through the filter plate and enter the receiving bag for storage. The two filter plates receive the waste soil lifted up by the corresponding side overturning plates. Because the filter plates are set at an angle, the waste soil with larger particles that cannot pass through the filter plates falls back into the crushing box along the filter plates and is crushed again. In this process, not only is the waste soil loosened, but the waste soil can also be screened during the crushing process, so that the crushed waste soil will not always stay in the crushing box, which will interfere with the crushing of the waste soil with large particles. That is, the waste soil to be crushed will continue to decrease during the crushing process, leaving only the waste soil with large particles to be crushed, thereby improving the crushing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the crushing assembly in the preparation process of the semi-sintered insulating hollow bricks made from engineering waste in the embodiment of the present application; Figure 2 This is a cross-sectional view of the structure of the crushing device of this application; Figure 3 It is a schematic diagram of the structure inside the crushing box.

[0028] In the figure: 10, working frame; 20, crushing box; 30, crushing assembly; 31, crushing cylinder; 311, rotating motor; 312, cavity; 32, screw rod; 40, rotating assembly; 41, fixed gear; 411, fixed rod; 42, rotating gear; 50, flipping assembly; 51, driving part; 511, cylinder; 512, pressure plate; 52, flipping plate; 60, filter plate; 61, receiving bag; 70, positioning assembly; 71, positioning gear; 72, positioning rack; 80, barrier net. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The present application discloses a process for preparing semi-sintered heat-insulating hollow bricks made from engineering waste. Figure 1 and Figure 2 The process for preparing semi-sintered insulating hollow bricks from construction waste soil includes waste soil screening and crushing, followed by mixing, molding, and sintering. These steps work together to transform construction waste soil into hollow bricks with excellent thermal insulation properties. This not only solves the waste soil disposal challenge but also reduces land resource and energy consumption associated with insulating brick production, achieving efficient resource utilization and environmental protection and energy conservation. This beneficial effect is due to the rational use of construction waste soil throughout the process and the relatively low-temperature sintering method, which reduces resource waste and energy loss.

[0031] Reference Figure 1 and Figure 2 Specifically, a crushing device is used in the step of waste soil screening and crushing. The crushing device includes a working frame 10, a crushing box 20 and a crushing assembly 30. The working frame 10 is the supporting base of the entire device and is generally made of metal, such as steel, which has high strength and stability. The crushing box 20 is arranged on the working frame 10. It is in the shape of a rectangular parallelepiped and is welded from steel plates. It is used to accommodate waste soil and provide space for the crushing process. The crushing assembly 30 is arranged in the crushing box 20 and is used to crush the waste soil.

[0032] Reference Figure 2 and Figure 3The crushing assembly 30 includes a crushing barrel 31 and a plurality of spiral rods 32. The crushing barrel 31 is arranged horizontally along the length direction of the crushing box 20, and its end is rotatably connected to the crushing box 20 through a bearing, which ensures that the crushing barrel 31 can rotate flexibly. The spiral rods 32 are arranged on the crushing barrel 31 and are perpendicular to the central axis of the crushing barrel 31. A plurality of spiral rods 32 are evenly arranged along the circumference direction of the crushing barrel 31 to form a circle of spiral rods 32 groups, and a plurality of spiral rods 32 groups are arranged at intervals along the length direction of the crushing barrel 31. The spiral rods 32 have a spiral structure. A rotating motor 311 is installed on the crushing barrel 31. The output shaft of the rotating motor 311 is coaxially fixed to one end of the crushing barrel 31. When the rotating motor 311 is started, the crushing barrel 31 can be driven to rotate.

[0033] Reference Figure 1 and Figure 2 The crushing barrel 31 is equipped with a rotating assembly 40 for driving the multiple screw rods 32 to rotate. The rotating assembly 40 includes several fixed gears 41 and several rotating gears 42. A cavity 312 is defined within the crushing barrel 31, and the fixed gears 41 are located within this cavity. Each of the fixed gears 41 corresponds to a set of screw rods 32, coaxial with the crushing barrel 31, and secured to the crushing chamber 20 via a fixed rod 411. The module and number of teeth of the fixed gears 41 are designed based on actual transmission requirements. Each of the rotating gears 42 corresponds to a set of screw rods 32, and the ends of the screw rods 32 are rotatably connected to the crushing barrel 31 via small bearings. The rotating gears 42 are located within the cavity 312 and coaxially secured to the screw rods 32, meshing with the fixed gears 41. As the crushing barrel 31 rotates, the rotating gears 42 rotate around the fixed gears 41, thereby driving the screw rods 32 to rotate, enhancing the crushing effect on the waste soil. This design ensures a more efficient crushing process and improves the quality of waste soil crushing.

[0034] Reference Figure 2 and Figure 3 The work frame 10 is provided with a flip assembly 50. The flip assembly 50 includes a drive member 51 and a plurality of flip plates 52. The flip plates 52 are located in the center of the crushing chamber 20 and are arranged symmetrically about the central axis of the crushing drum 31. The center portions of the flip plates 52 are rotatably connected to the work frame 10 via torsion springs. The flip plates 52 are located between adjacent screw rods 32.

[0035] Reference Figure 1 and Figure 2The driving member 51 is provided on the working frame 10. The driving member 51 abuts against the overturning rod and is used to drive the overturning rod to rotate. The driving member 51 includes a cylinder 511 and a pressure plate 512. The cylinder 511 is provided on the working frame 10. The pressure plate 512 is arranged horizontally. The output shaft of the cylinder 511 is connected to the pressure plate 512. When the cylinder 511 is working, it can drive the pressure plate 512 to move up and down. The pressure plate 512 is located above the overturning plate 52. The torsion spring is used to drive one end of the overturning plate 52 to abut against the pressure plate 512. When the pressure plate 512 descends, it will push the overturning plate 52 to rotate, thereby turning over the waste soil, making the waste soil more evenly distributed during the crushing process and improving the crushing efficiency.

[0036] Reference Figure 1 and Figure 2 The work frame 10 is also equipped with two filter plates 60, which are arranged symmetrically about the central axis of the crushing drum 31. The filter plates 60 are tilted downward at one end, near the crushing drum 31, to filter the waste soil, allowing waste soil that meets the particle size requirements to pass through while retaining unqualified waste soil on the filter plates 60. A receiving bag 61 is located below the filter plates 60 and outside the crushing box 20 to collect the qualified waste soil that passes through the filter plates 60.

[0037] Reference Figure 1 and Figure 2 The flipping plate 52 is located between the two filter plates 60. In the initial state, the torsion spring makes one end of the flipping plate 52 located in the crushing box 20, and the other end abuts against the pressure plate 512. The cylinder 511 is started to drive the pressure plate 512 downward, thereby pressing one end of the flipping plate 52, so that the height of the end of the flipping plate 52 is reduced. By using the principle of leverage, that is, the flipping plate 52 rotates, so that the other end of the flipping plate 52 moves up synchronously, and drives the waste soil to move up together, thereby realizing the flipping of the waste soil.

[0038] When the flip plate 52 lifts the waste soil, and after the waste soil is lifted up and falls off the flip plate 52, the waste soil is at a height high enough to fall onto the filter plate 60. The larger particles in this waste soil will remain on the filter plate 60, while the waste soil with smaller diameters can pass through the filter plate 60 and be stored in the receiving bag 61. The two filter plates 60 receive the waste soil lifted up by the flip plate 52 on the corresponding side. Because the filter plates 60 are tilted, the waste soil with larger particles that cannot pass through the filter plates 60 falls back into the crushing box 20 for further crushing. This process not only loosens the waste soil, but also screens the waste soil during the crushing process, so that the crushed waste soil does not remain in the crushing box 20 for a long time, thereby interfering with the crushing of the waste soil with larger particles. In other words, the waste soil to be crushed is continuously reduced during the crushing process, leaving only the waste soil with larger particles for crushing, thereby improving crushing accuracy.

[0039] Reference Figure 1 and Figure 2The middle portion of the filter plate 60 is rotatably connected to the work frame 10. The work frame 10 is provided with a positioning assembly 70, which is connected to the filter plate 60 and is used to secure the filter plate 60 to the work frame 10. The positioning assembly 70 includes a positioning gear 71 and a positioning rack 72. The positioning gear 71 is coaxially fixed to the filter plate 60. The positioning gear is rotatably connected to the work frame 10. The positioning rack 72 is slidably connected to the work frame 10 and can mesh with the positioning gear 71. By adjusting the meshing state of the positioning rack 72 and the positioning gear 71, the inclination angle of the filter plate 60 can be adjusted to meet different filtering requirements.

[0040] Reference Figure 1 and Figure 2 In addition, a barrier net 80 is provided on the working frame 10 and is horizontally arranged above the crushing box 20. The barrier net 80 plays a shielding role, so that when the overturning plate 52 lifts the waste soil, the waste soil will not exceed the height of the barrier net 80, that is, the waste soil with larger particles will not splash around and injure the operator, which is safer.

[0041] After the waste soil is screened and crushed, the next step is mixing. The waste soil, binder, and foaming agent are mixed in appropriate proportions. The binder can be cement, which helps the waste soil particles bond together, or other adhesives such as gypsum can be used. The foaming agent can be a chemical one, which generates gas during the subsequent heating process, forming a hollow structure, or a physical one, which introduces air through stirring to form bubbles. Water is then added and stirred until uniform, allowing all ingredients to fully blend. The mixture is then poured into a mold and pressed into shape. The mold shape is designed to meet the desired hollow brick specifications. The bricks can be air-dried or dried at low temperature to remove moisture and increase their strength. Finally, the bricks are sintered at 600-800°C and cooled to produce the finished hollow bricks. Compared to traditional processes, the lower sintering temperature reduces energy consumption.

[0042] The implementation principle of the preparation process of semi-sintered insulating hollow bricks made from engineering waste in the embodiment of the present application is as follows: the entire process makes full use of engineering waste, avoids simple landfill treatment of waste soil, and reduces the occupation of land resources and environmental pollution. The crushing efficiency and quality of the waste soil are improved by a reasonably designed crushing device. In the subsequent mixing, molding and sintering processes, suitable raw materials and process parameters are used to ensure that the prepared hollow bricks have good thermal insulation properties. At the same time, the relatively low-temperature sintering method reduces energy consumption and production costs, has significant economic and environmental benefits, and is a major improvement to the existing insulation brick preparation process.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A process for preparing semi-sintered heat-insulating hollow bricks from engineering waste, characterized in that: The following steps are involved: S1. Screening and crushing of waste soil to remove impurities; S2, mixing waste soil, binder and foaming agent in proportion; S3, add water and stir until uniform; S4, the mixture is injected into the mold and pressed into shape; S5. Bricks are naturally dried or baked; S6. The bricks are sintered at 600-800℃ and cooled to obtain hollow bricks.

2. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 1, characterized in that: In S1, a crushing device is used for crushing, wherein the crushing device comprises a working frame (10), a crushing box (20) and a crushing assembly (30), wherein the crushing box (20) is arranged on the working frame (10), and the crushing assembly (30) is arranged in the crushing box (20).

3. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 2, characterized in that: The crushing assembly (30) comprises a crushing barrel (31) and a plurality of spiral rods (32). The crushing barrel (31) is arranged along the length direction of the crushing box (20). The crushing barrel (31) is arranged horizontally, and the end of the crushing barrel (31) is rotatably connected to the crushing box (20). The spiral rod (32) is arranged on the crushing barrel (31). The spiral rod (32) is perpendicular to the central axis of the crushing rod. The plurality of spiral rods (32) are evenly arranged along the circumference direction of the crushing barrel (31) to form a circle of spiral rods (32) groups. The plurality of spiral rods (32) groups are arranged at intervals along the length direction of the crushing barrel (31). The crushing barrel (31) is provided with a rotating motor (311). The output shaft of the rotating motor (311) is coaxially fixed with one end of the crushing barrel (31) and is used to drive the crushing barrel (31) to rotate.

4. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 3, characterized in that: The crushing cylinder (31) is provided with a rotating assembly (40) for driving the plurality of spiral rods (32) to rotate. The rotating assembly (40) includes a plurality of fixed gears (41) and a plurality of rotating gears (42). A cavity (312) is provided in the crushing cylinder (31). The fixed gear (41) is arranged in the cavity (312). The plurality of fixed gears (41) correspond to the spiral rods (32) in a one-to-one manner. The fixed gear (41) is coaxial with the crushing cylinder (31) and is fixed to the crushing box (20) through a fixed rod (411). The plurality of rotating gears (42) correspond to the spiral rods (32) in a one-to-one manner. The ends of the spiral rods (32) are rotatably connected to the crushing cylinder (31). The rotating gear (42) is located in the cavity (312) and is coaxially fixed with the spiral rod (32). The rotating gear (42) meshes with the fixed gear (41).

5. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 3, characterized in that: The working frame (10) is provided with a flipping assembly (50), and the flipping assembly (50) includes a driving member (51) and a plurality of flipping plates (52). The driving member (51) is provided on the working frame (10), and the middle portion of the flipping plate (52) is rotatably connected to the working frame (10) through a torsion spring. The flipping plate (52) is located between adjacent spiral rods (32). The plurality of flipping plates (52) are symmetrically arranged with the central axis of the crushing cylinder (31). The driving member (51) abuts against the flipping rod to drive the flipping rod to rotate.

6. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 5, characterized in that: The driving member (51) includes a cylinder (511) and a pressure plate (512). The cylinder (511) is arranged on the working frame (10). The pressure plate (512) is arranged horizontally. The output shaft of the cylinder (511) is connected to the pressure plate (512) and is used to drive the pressure plate (512) to move up and down. The pressure plate (512) is located above the flip plate (52). The torsion spring is used to drive one end of the flip plate (52) to abut against the pressure plate (512).

7. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 5, characterized in that: Two filter plates (60) are provided on the working frame (10). The two filter plates (60) are arranged symmetrically with the central axis of the crushing cylinder (31). One end of the filter plate (60) close to the crushing cylinder (31) is tilted downward. A receiving bag (61) is provided below the filter plate (60). The receiving bag (61) is located outside the crushing box (20).

8. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 7, characterized in that: The middle portion of the filter plate (60) is rotatably connected to the working frame (10). The working frame (10) is provided with a positioning assembly (70). The positioning assembly (70) is connected to the filter plate (60) and is used to fix the filter plate (60) on the working frame (10).

9. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 8, characterized in that: The positioning assembly (70) includes a positioning gear (71) and a positioning rack (72); the positioning gear (71) is coaxially fixed to the filter plate (60); the positioning delay wheel is rotationally connected to the working frame (10); the positioning rack (72) is slidably connected to the working frame (10); and the positioning rack (72) can mesh with the positioning gear (71).

10. The process for preparing semi-sintered heat-insulating hollow bricks made from construction waste according to claim 2, characterized in that: The working frame (10) is provided with a barrier net (80), and the barrier net (80) is horizontally arranged above the crushing box (20).

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