CN221338960U - Foam lightweight composite soil preparation device based on solid waste - Google Patents

Abstract

The utility model provides a foam lightweight composite soil preparation device based on solid waste, which relates to the field of lightweight soil preparation, and comprises a crushing tank (10), a connecting column (20), a mixing tank (30), a connecting pipe (40) and a screening component, wherein the crushing tank (10) is arranged on the upper side of the mixing tank (20) and they are connected by a plurality of connecting columns (20); a connecting pipe (40) is arranged between the mixing tank (30) and the crushing tank (10) and is located between the connecting columns (20), and the connecting pipe (40) is connected to the bottom surface of the crushing tank (10) and is rotatably connected; the screening component is arranged on the lower side of the connecting pipe (40), and comprises a lifting plate (51), a rotating plate (52), an end cover (53) and a filter cartridge (54). The preparation device can first crush and screen the solid waste, and then mix it, so as to ensure the uniformity of the particle size during mixing; at the same time, the preparation device can be cleaned in real time during the stirring process to avoid the problem of raw materials adhering to the inner wall.

Description

Foam lightweight composite soil preparation device based on solid waste

Technical Field

The utility model relates to the technical field of lightweight soil preparation, in particular to a foam lightweight composite soil preparation device based on solid waste.

Background technique

Foamed lightweight soil has the advantages of porosity, lightness, adjustability of density and strength, and convenience of construction, and is widely used in civil engineering projects; it is made by mixing water, foam and cement or corresponding slag. At present, studies have shown that solid wastes such as red mud, steel slag, slag, fly ash, coal gangue, desulfurized gypsum, and bauxite tailings have gelling activity and can be used to prepare foamed lightweight composite soil. Chinese patent document CN217476261U discloses a foamed lightweight soil production device using industrial solid waste as raw materials, which uses mixing blades and a stirring motor to fully stir the industrial solid waste, uses a weight scale to weigh the production raw materials, realizes foam transportation through a foaming machine, and uses a variable frequency motor to complete the mixing and stirring of foam, water, and solid-liquid solid waste raw materials, thereby accurately producing foamed lightweight soil. However, the production device firstly does not crush the industrial solid waste, and secondly does not filter the industrial solid waste mixed with foam, resulting in uneven particle size and the presence of large particles in the industrial solid waste. If it is directly mixed with foam, there will be problems such as uneven stirring degree and poor density and strength of the foamed lightweight soil. At the same time, the production device is unable to clean the inner wall of the foamed soil production tank during the stirring process, resulting in residue or foam adhering to the inner wall, thereby affecting the mixing uniformity of the foamed lightweight soil.

Utility Model Content

In view of the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a foam lightweight composite soil preparation device based on solid waste, which can first crush and screen the solid waste, and then mix it, so as to ensure the uniformity of the particle size of the solid waste during the stirring process; at the same time, the preparation device cleans the inner wall of the mixing tank in real time during the stirring process to avoid the problem of uneven mixing caused by raw materials adhering to the inner wall.

The purpose of the utility model is achieved through the following technical solutions:

A foam lightweight composite soil preparation device based on solid waste comprises a crushing tank, a connecting column, a mixing tank, a connecting pipe and a screening assembly, wherein the crushing tank is arranged on the upper side of the mixing tank and they are connected by a plurality of connecting columns; a connecting pipe is arranged between the mixing tank and the crushing tank, and the connecting pipe is connected to the bottom surface of the crushing tank and is rotatably connected; the screening assembly is arranged on the lower side of the connecting pipe, and comprises a lifting plate, a rotating plate, an end cover and a filter cartridge, the lifting plate is arranged on the upper side of the mixing tank and its corresponding end is penetrated by the connecting column, the connecting column is slidably connected to the lifting plate, a rotating plate is rotatably arranged in the middle of the lifting plate and the end cover is clamped in the middle of the rotating plate, the cross section of the end cover is a "T"-shaped structure and a through hole is arranged in the middle thereof, the inner wall in the middle of the end cover is slidably connected to the outer wall of the connecting pipe and the "T"-shaped cross bar of the end cover is located on the upper side of the lifting plate, and the "T"-shaped vertical bars of the end cover respectively penetrate the rotating plate and the top surface of the mixing tank and are connected to the filter cartridge arranged inside the mixing tank.

Based on the further optimization of the above solution, a feeding funnel is arranged on the top of the crushing tank, and two parallel crushing rollers are arranged inside the crushing tank.

Based on further optimization of the above solution, the connecting pipe is located on the outer wall of the lower side of the crushing tank and is located between the connecting columns to sleeve the rotating handle.

Based on the further optimization of the above scheme, a plurality of vertical ridges are evenly arranged on the outer wall of the "T"-shaped vertical rod of the end cover and around its axis, a first sliding groove is provided on the inner wall of the turntable corresponding to the vertical ridge, and the vertical ridge is stuck in the corresponding first sliding groove to realize the end cover being stuck in the middle of the turntable; a through hole is provided on the top surface of the mixing tank corresponding to the end cover, and the diameter of the through hole is larger than the maximum outer diameter of the "T"-shaped vertical rod of the end cover (that is, the end cover with vertical ridges), so as to avoid interference with the top surface of the mixing tank when the end cover rotates.

Based on the further optimization of the above scheme, the lifting plate is located at the end face of the outer ring of the turntable and a plurality of support blocks are evenly arranged around the central axis of the lifting plate. A first annular groove is opened on the bottom face of the "T"-shaped cross bar of the end cover and corresponds to the support block. The top of the support block is stuck in the first annular groove and slidably connected, thereby realizing the support positioning of the end cover by the lifting plate and the relative rotation between the end cover and the lifting plate.

Based on the further optimization of the above scheme, a stirring assembly is arranged in the mixing tank, and the stirring assembly includes a positioning plate, a connecting plate, an arc scraper, a stirring shaft, a stirring rod and a driven gear. The positioning plate is arranged on the top of the inner cavity of the mixing tank through a lifting block, and the positioning plate is coaxially arranged with the end cover. The "T"-shaped vertical rod of the end cover passes through the middle of the positioning plate, and a second slide groove is provided in the middle of the positioning plate corresponding to the vertical convex ridge, and the vertical convex ridge is stuck in the corresponding second slide groove and is slidably connected; connecting plates are evenly arranged on the outer ring of the positioning plate and around its axis, and an arc scraper is fixedly arranged at one end of the connecting plate away from the positioning plate. The scraper strip in contact with the inner cavity wall of the mixing tank is arranged on the side of the plate and the arc scraper away from the connecting plate; the stirring shaft is arranged corresponding to the connecting plate and the lower end of the stirring shaft is rotatably connected with a rotating seat slidably arranged on the bottom surface of the mixing tank, and the rotating seat slides in a circle with the center of the mixing tank as the center of the circle. The upper end of the stirring shaft passes through the corresponding connecting plate and is located on the top surface of the mixing tank. The outer wall of the top end of the stirring shaft is fixedly sleeved with a driven gear, and a gear ring is arranged on the top surface of the mixing tank corresponding to the driven gear, and the driven gear is meshed with the inner teeth of the gear ring; stirring rods are evenly arranged on the outer wall of the stirring shaft between the connecting plate and the rotating seat.

Based on further optimization of the above solution, a foam feed pipe and a water inlet pipe communicating with the inner cavity of the mixing tank are respectively provided on the top surface of the mixing tank.

The following are the technical effects of the utility model:

The present application provides a crushing tank to crush the solid waste before the feed is mixed, and the solid waste is crushed into small particles, so as to facilitate the uniform mixing of the solid waste and the foam, etc.; the small particles of solid waste after crushing are discharged through the connecting pipe, and the end cover and the filter cartridge are driven to rotate as a whole through the connecting pipe, so as to realize the rotation screening of the filter cartridge and prevent the large particles of solid waste from entering the mixing tank, and the small particles of solid waste after crushing and screening, foam, water, etc. are uniformly mixed through the mixing tank, so as to ensure the quality and efficiency of the prepared foam lightweight composite soil. At the same time, the present application uses the combination of the lifting plate, the rotating plate, the end cover and the filter cartridge, and utilizes the rise and fall of the lifting plate to realize the sinking or leaving of the filter cartridge in the mixing tank, and realizes the filtering of the filter cartridge (i.e. when sinking into the mixing tank) and the replacement and cleaning of the filter cartridge (i.e. when the filter cartridge leaves the mixing tank), so as to effectively improve the filtering efficiency of the filter cartridge and ensure the full utilization of the solid waste raw materials.

In addition, the present application arranges a stirring assembly consisting of a positioning plate, a connecting plate, an arc-shaped scraper, a stirring shaft, a stirring rod and a driven gear, thereby ensuring uniform stirring while cleaning the side walls of the inner cavity of the mixing tank, avoiding the adhesion of solid waste residues or foam, and further ensuring the uniformity of mixing and full utilization of raw materials.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a preparation device in an embodiment of the present utility model.

FIG. 2 is a partial enlarged view of A in FIG. 1 .

Fig. 3 is a cross-sectional view taken along the line D-D of Fig. 2 .

Fig. 4 is a cross-sectional view taken along the line B-B of Fig. 1 .

Fig. 5 is a cross-sectional view taken along the line C-C in Fig. 1 .

Among them, 10, crushing tank; 11, feeding funnel; 12, crushing roller; 20, connecting column; 30, mixing tank; 301, foam feeding pipe; 302, water inlet pipe; 303, through hole; 304, gear ring; 31, positioning plate; 310, lifting block; 32, connecting plate; 33, arc scraper; 34, stirring shaft; 35, stirring rod; 36, driven gear; 40, connecting pipe; 41, turning handle; 51, lifting plate; 52, turntable; 520, support block; 53, end cover; 530, vertical ridge; 54, filter cartridge.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

Embodiment 1:

Refer to the figure below: A foam lightweight composite soil preparation device based on solid waste includes a crushing tank 10, a connecting column 20, a mixing tank 30, a connecting pipe 40 and a screening assembly. The crushing tank 10 is arranged on the upper side of the mixing tank 30 and they (i.e., the crushing tank 10 and the mixing tank 30) are connected by multiple connecting columns (the number of connecting columns 20 is not less than three); in this embodiment, connecting columns 20 are respectively arranged at the four corners of the bottom surface of the crushing tank 10, and the end of the connecting column away from the crushing tank 10 is fixedly connected to the top surface of the mixing tank 30.

A feeding funnel 11 (as shown in FIG. 1 ) is arranged on the top of the crushing tank 10, and two parallel crushing rollers 12 are arranged inside the crushing tank 10. As shown in FIG. 1 , the two parallel crushing rollers 12 are respectively sleeved on the outer walls of two parallel rotating shafts, and one end of the two rotating shafts passes through the corresponding side surfaces of the crushing tank 10 and are respectively sleeved on mutually meshing gears, so that the two crushing rollers 12 can rotate simultaneously and in opposite directions, and one of the rotating shafts is controlled to rotate by a motor arranged on the outside of the crushing tank 10. The driving of the crushing rollers 12 can adopt a conventional structure in the field, and this embodiment is only used as an exemplary description.

A connecting pipe 40 is arranged between the mixing tank 30 and the crushing tank 10 and between the connecting columns 20. The connecting pipe 40 is connected to the bottom surface of the crushing tank 10 and is rotatably connected. The connecting pipe 40 is located on the outer wall of the lower side of the crushing tank 10 and is located between the connecting columns 20. A rotating handle 41 (see Figure 2) is sleeved on the connecting columns 20, and the connecting pipe 40 is driven to rotate by rotating the handle 41.

The screening assembly is arranged at the lower side of the connecting pipe 40, and includes a lifting plate 51, a rotating plate 52, an end cover 53 and a filter cartridge 54. The lifting plate 51 is arranged at the upper side of the mixing tank 30 and its corresponding ends are penetrated by (respectively corresponding) connecting columns 20 (see FIG. 3 , that is, the four corners of the lifting plate 51 are respectively penetrated by four connecting columns 20), the connecting columns 20 and the lifting plate 51 are slidably connected, and the rotating plate 52 is rotatably arranged in the middle of the lifting plate 51 (for example: as shown in FIG. 3 , the outer wall of the rotating plate 52 is sleeved with a ball bearing and the outer wall of the ball bearing is fixedly connected to the inner wall of the hole opened in the middle of the lifting plate 51, so as to realize the relative rotation between the rotating plate 52 and the lifting plate 51), and the middle of the rotating plate 52 is clamped with the end cover 53, and the end cover 53 is clamped with the end cover 53. The cross section of the cover 53 is a "T"-shaped structure (see Figure 2) and a through hole is set in the middle thereof, and the inner wall in the middle of the end cover 53 is slidably connected to the outer wall of the connecting pipe 40 (for example: the outer wall of the connecting pipe 40 is evenly provided with ridges, and the inner wall of the end cover 53 is correspondingly provided with grooves, and the ridges are stuck in the corresponding grooves and are slidably connected, thereby realizing the sliding of the end cover 53 relative to the connecting pipe 40 in the vertical direction and the common rotation between the end cover 53 and the connecting pipe 40) and the "T"-shaped cross bar of the end cover 53 is located on the upper side of the lifting plate 51, and the "T"-shaped vertical bars of the end cover 53 respectively penetrate the turntable 52 and the top surface of the mixing tank 30, and are connected to the filter cartridge 54 arranged inside the mixing tank 30 (see Figures 1 and 2). The outer wall of the "T"-shaped vertical rod of the end cover 53 is evenly provided with a plurality of vertical ridges 530 around its axis (the number of the vertical ridges 530 is generally 3 to 8, as shown in Figures 3, 4 and 5, and the number of the vertical ridges 530 in this embodiment is 6), and a first slide groove is provided on the inner wall of the turntable 52 corresponding to the vertical ridge 530, and the vertical ridge 530 is stuck in the corresponding first slide groove to realize the end cover 53 being stuck in the middle of the turntable 52; a through hole 303 is provided on the top surface of the mixing tank 30 corresponding to the end cover 53, and the diameter of the through hole 303 is larger than the maximum outer diameter of the "T"-shaped vertical rod of the end cover 53 (that is, the maximum outer diameter of the end cover 53 with the vertical ridge 530, as shown in Figure 4), so as to avoid interference between the end cover 53 and the top surface of the mixing tank 30 when the end cover 53 rotates (that is, the mixing tank 30 restricts the rotation of the end cover 53). The lifting plate 51 is located at the end face of the outer ring of the turntable 52 and a plurality of support blocks 520 are evenly arranged around the central axis of the lifting plate 51 (the number of support blocks 520 is generally 3 to 6). A first annular groove is provided on the bottom face of the "T"-shaped cross bar of the end cover 53 and corresponds to the support block 520. The top of the support block 520 is stuck in the first annular groove and is slidably connected, thereby realizing the support positioning of the end cover 53 by the lifting plate 51 and the relative rotation between the end cover 53 and the lifting plate 51.

A stirring assembly is arranged in the mixing tank 30, and the stirring assembly includes a positioning plate 31, a connecting plate 32, an arc-shaped scraper 33, a stirring shaft 34, a stirring rod 35 and a driven gear 36. The positioning plate 31 is arranged at the top of the inner cavity of the mixing tank 30 through a hanging block 310, and the positioning plate 31 is coaxially arranged with the end cover 53 (that is, the mixing tank 30 is located at the top of the inner cavity of the outer wall of the end cover 53 and a plurality of hanging blocks 310 are evenly arranged around the central axis of the end cover 53, and the number of hanging blocks 310 is generally 3 to 6. The end surface of the positioning plate 31 corresponds to the hanging block 310 and a second annular chute is provided, and the bottom end of the hanging block 310 is stuck in the second annular chute and slidably connected, thereby realizing the positioning. The "T"-shaped vertical rod of the end cover 53 passes through the middle of the positioning plate 31 and the middle of the positioning plate 31 corresponds to the vertical ridge 530 to open a second slide groove, and the vertical ridge 530 is stuck in the corresponding second slide groove and slidably connected (thereby realizing the sliding of the end cover 53 relative to the positioning plate 31 in the vertical direction and the simultaneous rotation of the end cover 53 and the positioning plate 31); the outer circle of the positioning plate 31 and the connecting plates 32 are evenly arranged around the axis thereof (the number of the connecting plates 32 is set according to actual needs, as shown in FIG. 5, two connecting plates 32 are used in this embodiment), and the connecting plates 32 are connected to each other. An arc-shaped scraper 33 is fixedly arranged at one end of the connecting plate 32 away from the positioning plate 31, and a scraper strip in contact with the inner cavity wall of the mixing tank 30 is arranged on the side surface of the arc-shaped scraper 33 away from the connecting plate 32 (thereby cleaning the inner cavity wall of the mixing tank 30); a stirring shaft 34 is arranged corresponding to the connecting plate 32, and the lower end of the stirring shaft 34 is rotatably connected to a rotating seat slidably arranged on the bottom surface of the mixing tank 30, and the rotating seat slides in an annular manner with the center of the mixing tank 30 as the center of the circle (that is, an annular convex ridge coaxial with the mixing tank 30 is arranged on the bottom surface of the mixing tank 30 corresponding to the stirring shaft 34, and the bottom surface of the rotating seat is clamped on the annular convex ridge and slidably connected, and the bottom end of the stirring shaft 34 is connected to the top of the rotating seat The upper end of the stirring shaft 34 passes through the corresponding connecting plate 32 (the stirring shaft 34 is rotatably connected to the connecting plate 32) and is located in the top surface of the mixing tank 30 (a ring gear cavity is correspondingly arranged on the top surface of the mixing tank 30, as shown in FIG. 2), the outer wall of the top end of the stirring shaft 34 (corresponding to the ring gear cavity) is fixedly sleeved with the driven gear 36, and a gear ring 304 is arranged on the top surface of the mixing tank 30 (i.e., the side wall of the ring gear cavity) corresponding to the driven gear 36, and the driven gear 36 is meshed with the inner teeth of the gear ring 304 (as shown in FIG. 4); stirring rods 35 are evenly arranged on the outer wall of the stirring shaft 34 between the connecting plate 32 and the rotating seat (as shown in combination with FIG. 4 and FIG. 5).

The top surface of the mixing tank 30 is respectively provided with a foam feed pipe 301 and a water inlet pipe 302 (as shown in FIG. 1 ) which are connected to the inner cavity thereof, and the foam feed pipe 301 is connected to a foaming machine arranged outside the mixing tank 30 , and the water inlet pipe 302 is connected to a water pump arranged outside the mixing tank 30 .

working principle:

When in use, first start the two crushing rollers 12 in the crushing tank 10, and move the filter cartridge 54 down to the mixing tank 30 through the lifting plate 51 (the turntable 52 is located on the upper side of the through hole 303 and forms a seal on the through hole 303); then, pour in solid waste through the feeding funnel 11, and the solid waste is crushed into small particles of solid waste by the crushing tank 10 and falls into the filter cartridge 54 through the connecting pipe 40. At this time, rotate the connecting pipe 40, and simultaneously fill in foam through the foam feeding pipe 301, and pump in a proper amount of water through the water inlet pipe 302. The rotation of the connecting pipe 40 drives the end cover 53 and the filter cartridge 54 to rotate: during the rotation of the filter cartridge 54, small particles of solid waste are centrifugally thrown out and the solid waste is screened; the end cover 53 drives the turntable 52 and the positioning plate 31 and the lifting plate 51 to be relatively still. When the positioning disk 31 rotates, the connecting plate 32 drives the stirring shaft 34 and the arc scraper 33 to rotate around the central axis of the positioning disk 31 respectively. The arc scraper 33 scrapes and cleans the inner wall of the mixing tank 30 by rotating. During the rotation of the stirring shaft 34 around the central axis of the positioning disk 31 (i.e., during the revolution of the stirring shaft 34), the driven gear 36 is engaged with the internal teeth of the gear ring 304, causing the driven gear 36 to rotate, thereby driving the stirring shaft 34 to rotate around its own axis (i.e., the stirring shaft 34 rotates on its own), thereby achieving uniform mixing of the materials by the stirring rod 35.

When the preparation is completed, the material is discharged through the outlet arranged at the bottom of the mixing tank 30, and the lifting plate 51 is used to drive the end cover 53 and the filter cartridge 54 to move upward, so that the filter cartridge 54 leaves the mixing tank 30 and is located on the upper side of the mixing tank 30, and then the filter cartridge 54 is removed from the end cover 53 to clean or replace the filter cartridge 54, thereby avoiding the problem of large particles of solid waste clogging the filter cartridge 54.

Embodiment 2:

As a further optimization of the scheme of the utility model, on the basis of the scheme of Example 1, the lifting plate 51 can be controlled to move up and down by a hydraulic lifting device arranged on the top surface of the mixing tank 30, and can also be controlled to move up and down by a screw sliding mechanism arranged between the crushing tank 10 and the mixing tank 30. The hydraulic lifting device and the screw sliding mechanism can both adopt a common structural combination in the field.

Embodiment 3:

As a further optimization of the solution of the utility model, on the basis of the solution of Example 1, the rotating handle 41 can be rotated manually or electrically. When it is set to be rotated electrically, the outer wall of the rotating handle 41 is fixedly sleeved with an outer gear ring, and a motor with a driving gear on the outer wall of the output shaft is arranged at the bottom of the crushing tank 10, and the driving gear is meshed with the outer gear ring.

Claims (7)

1. A foam light composite soil preparation device based on solid waste is characterized in that: the device comprises a crushing tank, a connecting upright post, a mixing tank, a communicating pipe and a screening component, wherein the crushing tank is arranged on the upper side of the mixing tank and is connected with the mixing tank through a plurality of connecting upright posts; a communicating pipe is arranged between the connecting upright posts of the mixing tank and the crushing tank, and is communicated with the bottom surface of the crushing tank and rotationally connected with the crushing tank; the screening subassembly sets up in communicating pipe downside, including the lifter plate, the carousel, end cover and cartridge filter, the lifter plate sets up in mixing tank upside and its corresponding end is run through by the connecting column, connecting column and lifter plate sliding connection, the lifter plate middle part rotates and sets up carousel and carousel middle part joint end cover, the end cover cross section is "T" font structure and its middle part sets up the perforation, end cover middle part inner wall and communicating pipe outer wall sliding connection and the "T" font horizontal pole of end cover are located the lifter plate upside, the "T" font montant of end cover runs through respectively behind carousel and the mixing tank top surface, be connected with the cartridge filter that sets up at the mixing tank inside.

2. The solid waste-based foam lightweight composite soil preparation device according to claim 1, wherein: the crushing tank top sets up feed hopper, crushing tank inside sets up two parallel crushing rollers.

3. The solid waste-based foam lightweight composite soil preparation device according to claim 1, wherein: the communicating pipe is positioned on the outer wall of the lower side of the crushing tank and positioned between the connecting upright posts to be sleeved with the rotating handle.

4. The solid waste-based foam lightweight composite soil preparation device according to claim 1, wherein: the outer wall of the T-shaped vertical rod of the end cover is uniformly provided with a plurality of vertical ribs around the central axis of the T-shaped vertical rod, the inner wall of the turntable is provided with a first chute corresponding to the vertical ribs, and the vertical ribs are clamped in the corresponding first chute to realize the clamping of the end cover in the middle of the turntable; the top surface of the mixing tank is provided with a through hole corresponding to the end cover, and the diameter of the through hole is larger than the maximum outer diameter of the T-shaped vertical rod of the end cover.

5. The solid waste-based foam lightweight composite soil preparation device according to claim 4, wherein: the lifting disc is located the terminal surface of carousel outer lane and evenly sets up a plurality of supporting shoe around the lifting disc axis, and first annular spout is seted up to "T" font horizontal pole bottom surface of end cover and corresponding supporting shoe, and supporting shoe top card is in first annular spout and sliding connection.

6. The solid waste-based foam lightweight composite soil preparation device according to claim 4, wherein: the stirring assembly is arranged in the mixing tank and comprises a positioning disc, a connecting plate, an arc scraping plate, a stirring rotating shaft, a stirring rod and a driven gear, wherein the positioning disc is arranged at the top of an inner cavity of the mixing tank through a hoisting block and is coaxially arranged with the end cover, a T-shaped vertical rod of the end cover penetrates through the middle part of the positioning disc, a second sliding groove is formed in the middle part of the positioning disc corresponding to the vertical convex edge, and the vertical convex edge is clamped in the corresponding second sliding groove and is in sliding connection; the outer ring of the positioning disk is uniformly provided with a connecting plate around the central axis of the outer ring, one end of the connecting plate, which is far away from the positioning disk, is fixedly provided with an arc scraping plate, and the side surface of one side of the arc scraping plate, which is far away from the connecting plate, is provided with a scraping strip which is contacted with the inner cavity wall of the mixing tank; the stirring rotating shaft is arranged corresponding to the connecting plate, the lower end of the stirring rotating shaft is rotationally connected with a rotating seat which is slidably arranged on the bottom surface of the mixing tank, the rotating seat performs annular sliding by taking the center of the mixing tank as the center of a circle, the upper end of the stirring rotating shaft penetrates through the corresponding connecting plate and is positioned in the top surface of the mixing tank, the outer wall of the top end of the stirring rotating shaft is fixedly sleeved with a driven gear, the top surface of the mixing tank is provided with a toothed ring corresponding to the driven gear, and the driven gear is meshed with the inner teeth of the toothed ring; the stirring rod is evenly arranged on the outer wall of the stirring rotating shaft between the connecting plate and the rotating seat.

7. The solid waste-based foam lightweight composite soil preparation device according to claim 1, wherein: the top surface of the mixing tank is respectively provided with a foam feeding pipe and a water inlet pipe which are communicated with the inner cavity of the mixing tank.