Foundation improved soil crushing and screening equipment

Abstract

The invention relates to foundation improved soil crushing and screening equipment which comprises a main shaft, a supporting frame, a crushing assembly, a rolling assembly, a discharging plate and a discharging assembly, the crushing assembly, the rolling assembly, the discharging plate and the discharging assembly are arranged on the supporting frame, the crushing assembly comprises a rotary screen, a protection plate and a crushing cutter, and primary crushing and screening of soil are achieved through cooperative operation of the rotary screen and the crushing cutter; soil blocks with various particle sizes can be effectively treated through secondary crushing of the rolling assembly, it is ensured that the final soil particle size is strictly controlled within the construction requirement range, the problem that traditional screening equipment is poor in crushing effect is solved, the functions of crushing, screening, rolling and mixing are integrated, the whole foundation improved soil treatment process is more coherent and efficient, and the construction efficiency is improved. The connection time between construction links is shortened, the construction efficiency is greatly improved, the mixing uniformity of plain soil and lime soil is guaranteed, and the quality and performance of foundation filling are improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation soil backfill construction, and in particular to a foundation improvement soil crushing and screening device. Background Art

[0002] When the soil beneath a building's foundation does not meet the required quality, the foundation soil needs to be replaced. Replacement is a common foundation reinforcement technique in foundation treatment projects, particularly suitable for scenarios where the bearing layer soil quality does not meet design requirements. By replacing weak soil layers with improved materials such as plain soil or lime soil, the bearing capacity of the foundation can be effectively improved, ensuring the safety and stability of the superstructure. Controlling the particle size of the plain or lime soil is a core component of the replacement process. Construction specifications require that the particle size of the soil used for replacement be strictly controlled within 50mm to avoid problems such as loose tamping or localized stress concentration due to excessive coarse particle content. However, in actual projects, natural soil materials often contain oversized particles, requiring screening to meet construction requirements. This places high demands on the efficiency, adaptability, and environmental friendliness of the screening equipment.

[0003] Currently, foundation soil screening primarily relies on manual screening or simple mechanical screening devices. Manual screening uses a shovel and a fixed screen, which, while inexpensive, presents significant drawbacks: high labor intensity, low screening efficiency, and severe dust generation, which not only impacts construction progress but also poses challenges to worker health and the management of civilized construction on site. Existing simple mechanical screening equipment, such as vibrating screens or drum screens, while improving screening efficiency to a certain extent, still suffers from the following deficiencies: they can only screen soil and are unable to crush and reuse oversized soil lumps. A large amount of soil that fails to pass through the screen cannot be effectively utilized, increasing material costs and limiting practicality.

[0004] Based on this, it is necessary to study a foundation improvement soil crushing and screening equipment. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a foundation improvement soil crushing and screening equipment, which effectively solves the problems of low efficiency and poor quality of existing manual screening, and poor mechanical screening and crushing effect resulting in material waste.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a foundation improvement soil crushing and screening equipment, including a main shaft, a support frame, and a crushing assembly, a rolling assembly, a discharge plate and a discharge assembly arranged on the support frame, the crushing assembly includes a drum screen, a protective plate and a crushing knife; the drum screen is rotatably arranged on the support frame, and a leakage plate is provided at intervals on the outside of the drum screen; a plurality of groups of crushing knives are respectively fixedly sleeved on the main shaft along the circumference, for performing preliminary breaking up and screening operations on the raw soil material in the screen drum, the main shaft is concentrically sleeved in the screen drum, and its end is transmission-connected to the driving source; the rolling assembly includes a screen drum, a connecting seat, a rolling plate and a scraper, the screen drum is fixedly arranged on the support frame, and is sleeved at intervals. The connecting seat is fixedly mounted on the main shaft, and the outer ends of the connecting rods on the connecting seat are respectively fixed with rolling plates and scrapers. The soil blocks in the screen drum are crushed by the rolling plates, and the loose soil covered on the inner wall of the screen drum is scraped up by the scrapers. The discharge plate is arranged below the drum screen and the screen drum, and is elastically installed on the support frame with an angle downward. The ash conveyor is arranged above the discharge plate, and its central axis is connected to the main shaft with a discharge port facing the discharge plate. The discharge assembly is arranged at the output end of the discharge plate for receiving the primary mixture of plain soil and ash soil unloaded from the discharge plate, and discharging the primary mixture after mixing it evenly.

[0007] Furthermore, the rolling plate has an arc-shaped structure, and the distance between it and the wall of the screen drum gradually decreases from wide to narrow, and the end of the scraper is in contact with the inner wall of the screen drum.

[0008] Furthermore, a vibrator is fixedly installed on the bottom of the unloading plate, and vibration springs are symmetrically fixed on the bottoms of the front and rear ends of the unloading plate, and the bottoms of the vibration springs are fixed to the support frame.

[0009] Furthermore, rotating sleeves are evenly fixed on the main shaft in the drum screen, connecting rods are fixed on each rotating sleeve along the circumference, each connecting rod extends outward in a dispersed manner, and the crushing knives are evenly fixed on each connecting rod by bolts.

[0010] Furthermore, the ash and soil conveyor includes a conveying auger and a shell, the conveying auger is arranged in the shell, the central shaft on the auger is connected to the main shaft, and the central shaft extends to the outside of the shell to be connected to the driving source; a feed port is provided on the shell, and a discharge port is provided on the side of the shell close to the screen drum, and the discharge port corresponds to the discharge plate.

[0011] Furthermore, the discharge assembly includes a screw conveyor, and the feed port of the screw conveyor is correspondingly connected to the output end of the discharge plate.

[0012] Furthermore, the support frame is arranged on the vehicle body, and the bottom of the vehicle body is provided with moving wheels and a hydraulic jack.

[0013] Furthermore, a conveyor belt is provided on the vehicle body below the discharge assembly, and the conveyor belt corresponds to the output end of the discharge assembly.

[0014] Furthermore, a cleaning brush is symmetrically provided on the top of the leakage plate, and the brush head of the cleaning brush contacts the drum screen to clean the mesh on the drum screen to prevent clogging.

[0015] Furthermore, a driving motor is provided on the support frame, a driving gear is fixed to the output end of the driving motor, a driven gear is fixedly sleeved on the end of the driving shaft, and the driven gear and the driving gear are connected via a belt transmission.

[0016] The beneficial effect of the above technical solution is: the foundation improvement soil crushing and screening equipment provided by the present invention realizes the primary crushing and screening of soil materials through the coordinated operation of the drum screen and the crushing knife, and then undergoes secondary crushing by the rolling assembly, which can effectively process soil blocks of various particle sizes, ensuring that the final soil particle size is strictly controlled within the construction requirements, and solving the problem of poor crushing effect of traditional screening equipment.

[0017] The present invention integrates the functions of crushing, screening, rolling and mixing into one, making the entire foundation improvement soil processing process more coherent and efficient, reducing the connection time between construction links, greatly improving construction efficiency, and saving construction procedures; the ash soil conveyor can evenly convey the ash soil to the unloading plate for initial mixing with the plain soil, and then further mixing it through the screw conveyor, ensuring the uniformity of the mixing of the plain soil and ash soil, which is beneficial to improving the quality and performance of the foundation fill; the equipment is reasonably designed, and through the mesh control of the leakage plate and the screen drum and the protective plate and other structures, it effectively avoids the splashing and spilling of soil materials during the processing process, thereby reducing material waste.

[0018] The present invention forms a speed difference between the rotation of the crushing knife in the drum screen and the rotation of the drum screen, thereby achieving the simultaneous completion of the initial breakup and screening of the soil clods, avoiding the direct accumulation of raw soil materials at the bottom of the drum screen and affecting the crushing and breakup effect, and the inclined crushing knife forms a shear force field when rotating, effectively improving the crushing efficiency; the filter screen at the bottom of the leakage plate dynamically cooperates with the drum screen, and the solid side wall of the leakage plate and the bottom mesh are combined in design, which not only prevents material splashing but also ensures effective screening, and is used in conjunction with a cleaning brush to effectively avoid mesh blockage.

[0019] The arc-shaped rolling plate and the screen drum wall form a gradually shrinking rolling space. Such a gradual spacing design produces a progressive extrusion force, which enables the soil material to be broken in layers within the rolling space, and the particle size of the soil blocks is stably controlled within the effective use range through step-by-step pressure application. The phase difference design between the scraper and the rolling plate immediately peels off the soil material attached to the screen drum wall after the rolling is completed. The alternating rolling and scraping action forms a dynamic cleaning mechanism to ensure the continuity of the operation and improve the utilization rate of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the present invention; Figure 2 Schematic diagram of the implementation structure of the crushing component; Figure 3 Schematic diagram of the cross-sectional structure of the drum screen; Figure 4 Schematic diagram of the implementation structure of the rolling component; Figure 5 Schematic diagram of the cross-sectional structure of the screen drum; Figure 6 This is a schematic diagram of the implementation structure of the ash and soil conveyor; Figure 7 Schematic diagram of the implementation structure of the stripper plate; Figure 8 A structural diagram of another embodiment of the present invention Figure 9 This is a schematic diagram of the implementation structure of the feed port on the drum screen; Figure 10 Another structural diagram of a leak plate Figure 11 This is a structural schematic diagram of another embodiment of the present invention.

[0021] Figure 1: Support frame, 2: Main shaft, 21: Driven gear, 22: Driving gear, 23: Driving motor, 24: Shaft seat, 3: Crushing assembly, 31: Drum screen, 32: Leakage plate, 331: Rotating motor, 332: Bearing seat, 333: Roller, 334: Rotating shaft, 34: Leakage plate frame, 35: Crushing knife, 36: Sleeve, 4: Rolling assembly, 41: Screen drum, 42: Screen drum frame, 43: Mesh, 44: Connecting seat, 45: Rolling Plate, 46-scraper, 5-ash and soil conveyor, 51-shell, 52-conveyor auger, 53-discharge port, 54-center shaft, 6-discharge plate, 7-discharge assembly, 71-feed port, 72-discharge port, 81-vibrator, 82-vibration spring, 83-protective plate, 9-conveyor belt, 10-car body, 11-moving wheel, 12-jack, 13-soil feed port, 14-cleaning brush, 15-baffle, 16-temporary storage chamber, 17-diversion channel. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1: This example aims to provide a foundation improvement soil crushing and screening equipment, which is mainly used for crushing and screening operations before backfilling of improvement materials such as plain soil and ash soil in foundation treatment projects. The existing screening equipment has poor crushing effect, high labor intensity of manual screening, and is prone to material waste. Figure 1-7As shown, the foundation improvement soil crushing and screening equipment provided by this embodiment includes a support frame 1, a main shaft 2, and a crushing component 3, a rolling component 4, a ash and soil conveyor 5, a discharge plate 6 and a discharge component 7 arranged on the support frame 1. The equipment integrates the functions of crushing, screening, rolling and mixing into one, and realizes the preliminary breaking up and screening of soil materials through the coordinated action of the drum screen and the crushing knife, and then realizes the secondary crushing of oversized soil materials through the cooperation of the arc-shaped rolling plate and the screen drum. Finally, the primary mixture of the screened plain soil and ash soil is stirred and evenly mixed through the discharge component and then discharged.

[0023] In the specific implementation structure, such as Figure 1 and 2 As shown, in this embodiment, the crushing assembly 3 includes a drum screen 31, a leak plate 32 and a crushing knife 35, etc., wherein the drum screen 31 is rotatably arranged on the support frame 1. In this embodiment, a driving assembly is provided on the top of the support frame 1 to control the rotation of the drum screen 31. The above-mentioned driving assembly includes a rotating motor 331, rollers 333 and a rotating shaft 334, etc. The rollers 333 are distributed around the front and back of the drum screen 31 and are in contact with the drum screen 31. The rotating shaft 334 is rotatably installed between the inner and outer groups of rollers 333 respectively, and the end of the outer rotating shaft 334 is connected to the rotating motor 331 through the bearing seat 332. The rotating motor 331 is fixed to the top of the support frame 1, so that when the controller drives the rotating motor 331 to work, the drum screen 31 can be driven to rotate by the transmission of the roller 333 (the structural setting and working principle of the above-mentioned driving assembly are prior art and will not be elaborated here).

[0024] like Figure 2 and 3 As shown, a collet frame 34 is fixed vertically upward on the top of the support frame 1, and collet frames 32 are spaced apart on the outside of the drum screen 31. The bottom of the collet frames 32 is evenly perforated. That is, the side wall of the collet frame 32 opposite the drum screen 31 is a solid structure, and the bottom of the collet frame 32 is a filter mesh structure. The top of the collet frame 32 is folded outward to form a flange structure. The flange structures on the front and back sides are respectively fixed to the collet frame 34 on the support frame by bolts. Therefore, the solid structure on the collet frame 32 can prevent the raw soil material in the drum screen 31 from splashing out of the drum screen mesh during the rolling screening process. Raw soil material that meets the particle size requirements directly falls downward from the mesh holes of the drum screen 31 and the outer collet frames 32 onto the discharge plate 6, while raw soil with larger particle size is broken up by the crushing blades 35 in the drum screen 31 and falls downward through the sieve.

[0025] like Figure 3As shown, multiple groups of crushing knives 35 are fixedly sleeved on the main shaft 2 along the circumference and are evenly distributed on the main shaft 2. The main shaft 2 is concentrically sleeved in the screen drum 41, and its end is connected to the driving source. Specifically, a rotating sleeve is evenly fixed on the main shaft 2 in the drum screen 31, and a connecting rod is fixed on each rotating sleeve along the circumference. Each connecting rod extends outward in a dispersed manner. The crushing knives 35 are evenly fixed on each connecting rod by bolts. The crushing knives 35 are tilted outward, so that when the raw soil material passes through the drum screen 31, the drum screen 31 continues to rotate, and at the same time, the crushing knives 35 are evenly fixed on the connecting rods. The driving source controls the main shaft 2 to drive the crushing knife 35 to rotate, thereby performing preliminary breaking up and screening operations on the raw soil material in the drum screen 31, so that the soil material that has condensed into large lumps in the drum screen 31 is broken up or broken into small lumps of soil, and the loose soil that meets the particle size requirements after being broken by the crushing knife 35 directly passes through the mesh holes at the bottom of the drum screen 31 and the leak plate 32 and falls down onto the discharge plate 6, while some residual soil lumps that have not been completely broken are transported backward to the screen drum 41 of the rolling assembly 4 under the rotation and transmission action of the drum screen for secondary crushing operations.

[0026] like Figure 4 and 5 As shown, in this embodiment, the rolling assembly 4 includes a screen drum 41, a connecting seat 44, a rolling plate 45 and a scraper 46. A screen drum frame 42 is fixed vertically upward on the top of the support frame 1. The middle part of the screen drum frame 42 is an arc-shaped structure, which is adapted to the outer diameter of the screen drum 41, so that the screen drum 41 is fixedly sleeved on the screen drum frame 42 and is correspondingly connected to the output port of the drum screen 31. The main shaft 2 extends backward in the horizontal direction to the inner cavity of the screen drum 41 and is coaxial with the screen drum 41. Furthermore, in this embodiment, a sleeve 36 is rotatably sleeved at the output port of the drum screen 31, and the front end of the screen drum 41 is fixedly sleeved in the sleeve 36, so that the drum screen 31 can rotate relative to the sleeve 36, and the screen drum 41 is fixed on the support frame 1, so that the inlet of the screen drum 41 is correspondingly connected to the output end of the drum screen 31, and mesh holes 43 are evenly opened at the bottom of the screen drum 41.

[0027] The connecting seat 44 is fixedly mounted on the main shaft 2 in the screen drum 41. Two connecting rods are vertically fixed on the connecting seat 44. A certain angle is formed between the two connecting rods. The outer ends of the connecting rods are respectively fixed with a rolling plate 45 and a scraper 46. Figure 5 As shown, the rolling plate 45 has an arc-shaped structure, one end of which is inclined and bent toward the main shaft 2, and the other end is adapted to the curvature of the inner wall of the screen drum 41, so that the distance between the rolling plate 45 and the wall of the screen drum 41 gradually decreases from wide to narrow, so that when it rotates with the main shaft 2, the bare soil blocks can enter the rolling space between the rolling plate 45 and the wall of the screen drum 41, and as the rolling plate 45 rotates, the soil blocks in the rolling space can be squeezed and crushed.

[0028] Furthermore, the outer end of the scraper 46 contacts the inner wall of the sieve drum 41. To prevent the soil from being pressed against the drum wall by the rolling plate 45, the mesh holes 43 on the sieve drum 41 are covered and blocked, so that the soil may not leak downward from the mesh holes 43. Therefore, after the rolling plate 45 has rolled once, the scraper 46 can be used to scrape up the loose soil pressed against the inner wall of the sieve drum 41, so that the crushed loose soil passes through the mesh holes 43 on the sieve drum 41 and falls downward onto the discharge plate 6. In addition, in this embodiment, the filter mesh holes 43 are only provided on the bottom quarter of the circular arc of the sieve drum 41, so that the raw soil in the sieve drum 41 leaks out from the filter at the bottom, and avoids spilling out from the side walls or top of the sieve drum 41, causing material waste.

[0029] The arrangement of the crushing assembly 3 and the rolling assembly 4 in this embodiment utilizes a drum screen 31 and crushing blades 35 to achieve primary crushing and screening of the soil material. The secondary crushing design of the rolling assembly 4 forms a process path from coarse crushing to fine crushing, ensuring that the final soil material particle size is strictly controlled within construction requirements. The crushed soil material falls directly onto the discharge plate 6, where it is vibrated and initially mixed with the ash and soil material discharged from the ash and soil conveyor 5. Finally, the mixture is discharged through the discharge assembly 7, effectively improving construction efficiency and saving construction steps.

[0030] like Figure 1 and 6 As shown, the ash and soil conveyor 5 is fixed to the support frame 1. The ash and soil conveyor 5 includes a housing 51 and a conveying auger 52. A conical ash and soil feed port 71 is provided above the housing 51. A discharge port 53 is provided below the housing 51 on a side adjacent to the screen drum 41. The discharge port 53 corresponds to the discharge plate 6. The conveying auger 52 is disposed within the housing 51. The central shaft 54 on the conveying auger 52 is transmission-connected to the main shaft 2. The central shaft 54 extends rearward to the outside of the housing 51 and is transmission-connected to the drive source. In this way, ash and soil can enter the housing 51 from the feed port 71 on the housing 51. Under the action of the conveying auger 52, the uniform ash and soil material falls downward from the discharge port 53 onto the discharge plate 6 for initial mixing with the raw soil material.

[0031] It should be noted that if Figure 1As shown, the front end of the main shaft 2 is rotatably mounted in the shaft seat 24 on the support frame 1, and the front end is fixedly fitted with a driven gear 21. A drive motor 23 is provided on the support frame 1, and a driving gear 22 is fixed to the output end of the drive motor 23. The driven gear 21 and the driving gear 22 are connected by a belt transmission. The rear end of the driving shaft in the ash conveyor 5 extends outward to the outside of the housing 51, and the end is also connected to the motor through gears and belt transmission. By controlling the operation of the front and rear end drive motors 23, the main shaft 2 and the driving shaft are driven to rotate synchronously (the transmission connection between the gear belt and the motor is an existing technology and will not be described here). In actual application, the main shaft 2 can also be extended backward into the housing 51 according to engineering needs, and the conveying auger 52 is set on the main shaft 2. The front and rear ends of the main shaft 2 are respectively connected to the driving source, so that the drum screen 31, the screen drum 41 and the ash conveyor 5 are all coaxially arranged.

[0032] like Figure 1 and 7 As shown, the discharge plate 6 is arranged below the drum screen 31, the screen drum 41 and the ash and soil discharge port 53. The front top of the discharge plate 6 is connected to the support frame 1. The plate body of the discharge plate 6 is tilted downward and elastically mounted on the support frame 1. A vibrator 81 is fixedly mounted at the bottom of the discharge plate 6. Vibration springs 82 are symmetrically fixed to the bottom of the front and rear ends of the discharge plate 6. The bottom of the vibration spring 82 is fixed to the support frame 1. The controller drives the vibrator 81 to vibrate, which can drive the discharge plate 6 to vibrate on the support frame 1, so that the soil and ash materials on the discharge plate 6 can be preliminarily mixed, and then transported downward along the tilt direction of the discharge plate 6 to the screw conveyor below. In order to prevent the material on the discharge plate 6 from splashing out during the vibration process, protective plates 83 are also fixed to the support frame 1 on both sides of the discharge plate 6 to protect the mixed material so that the primary mixed material can be accurately discharged into the screw conveyor.

[0033] like Figure 7 As shown, in this embodiment, the discharge assembly 7 is a screw conveyor. The feed port 71 of the screw conveyor is connected to the output end of the discharge plate 6. The screw conveyor is used to receive the initial mixture of raw soil and ash soil discharged from the discharge plate 6, stir the initial mixture until it is evenly mixed, and then discharge the finished fill material from the discharge port 72. In actual application, the discharge assembly 7 can also be a mixer, etc., for evenly stirring the mixture of raw soil and ash soil before discharging it.

[0034] Description of the working principle: The foundation improvement soil crushing and screening equipment provided in this embodiment, when actually used, the foundation improvement soil to be processed, including plain soil and ash soil, is added to the drum screen 31 and the ash soil conveyor 5 respectively from the feed port 71 of the equipment. Under the rotation of the drum screen 31 and the high-speed rotation of the crushing knife 35, the soil blocks are preliminarily crushed and broken up, and the small particles that meet the particle size requirements will fall directly from the mesh holes on the drum screen 31 and the outer leakage plate 32, and finally reach the discharge plate 6. Some large pieces of soil that have not been completely crushed continue to be further processed by the crushing knife 35 in the drum screen 31 until the particle size meets the requirements and falls down, or is transported to the subsequent rolling assembly 4. In the screen cylinder 41 of the rolling assembly 4, the rolling plate 45 squeezes and crushes the soil blocks as the main shaft 2 rotates, thereby achieving secondary crushing of the soil blocks. At the same time, the scraper 46 will scrape off the soil that adheres to the inner wall of the screen cylinder 41 after rolling, so that it can smoothly fall down from the mesh 43 at the bottom of the screen cylinder 41 and also gather on the discharge plate 6.

[0035] The ash soil is added from the conical feed port 51 of the ash soil conveyor 5, and is transported by the conveying auger 52, and is evenly discharged from the discharge port 53 to the discharge plate 6, where it is preliminarily mixed with the raw soil material that has been screened and dropped. The discharge plate 6 vibrates under the action of the vibrator 81, causing the raw soil and ash soil material on the discharge plate 6 to be further mixed evenly, and transported downward along the inclined direction of the discharge plate 6. The preliminarily mixed materials enter the feed port 71 of the screw conveyor from the output end of the discharge plate 6. The screw conveyor further stirs and mixes these preliminary mixed materials evenly, and finally discharges the finished fill material from the discharge port 72 for backfill operations in foundation treatment projects.

[0036] The foundation improvement soil crushing and screening equipment provided in this embodiment realizes primary crushing and screening of soil materials through the coordinated operation of the drum screen 31 and the crushing knife 35, and then undergoes secondary crushing by the rolling component 4, which can effectively process soil blocks of various particle sizes, ensuring that the final soil particle size is strictly controlled within the construction requirements. It solves the problem of poor crushing effect of traditional screening equipment, integrates crushing, screening, rolling and mixing functions into one, making the entire foundation improvement soil processing process more coherent and efficient, reducing the connection time between construction links, greatly improving construction efficiency, and saving construction procedures. The equipment is suitable for the pre-backfill treatment of improvement materials such as plain soil and gray soil commonly found in foundation treatment projects, has a wide range of applicability, and can meet the needs of different foundation treatment projects.

[0037] Example 2, based on Example 1, the same points as Example 1 are not repeated here, except that this example provides another implementation method, such as Figure 8As shown, in actual application, the support frame 1 can be mounted on a vehicle body 10, and a movable wheel 11 and a hydraulic jack 12 are provided at the bottom of the vehicle body 10. In this way, during the construction process, the equipment can change the construction position according to the site conditions and construction requirements, which facilitates on-site construction. The hydraulic jack 12 at the bottom of the vehicle body 10 can lift the vehicle body 10 upward and make the movable wheel 11 leave the ground, thereby ensuring that the wheels are protected from passive load damage during construction.

[0038] Example 3, based on Examples 1 and 2, this example provides another implementation method, such as Figure 8 As shown, a conveyor belt 9 is provided on the vehicle body 10 below the discharge assembly 7. The conveyor belt 9 corresponds to the output end of the discharge assembly 7. The qualified mixed finished materials can be transported outwards to the transport vehicle through the conveyor belt 9 to facilitate construction.

[0039] Example 4: This example further illustrates the structure of the drum screen 31. Figure 9 As shown, a raw soil feed port 13 is provided on the front side of the drum screen 31. The raw soil feed port 13 is fixed to the front side of the drum screen 31 through a mounting frame and is located above the main shaft 2, thereby effectively avoiding interference with the rotation of the main shaft 2. At the same time, it ensures that the raw soil can stably enter the drum screen 31, providing convenience for raw soil feeding.

[0040] Example 5, this example further illustrates the structure of the bushing 32. Figure 10 As shown, a cleaning brush 14 is symmetrically provided on the top of the drain plate 32, and the brush head of the cleaning brush 14 contacts the drum screen 31 to clean the mesh 43 on the drum screen 31 to prevent clogging.

[0041] Example 6, based on the above examples, this example further explains the structural arrangement and working principle of the discharge plate 6. During the foundation soil backfill construction, the ratio of the raw soil material and the ash soil material is a preset value. In order to ensure that the raw soil and ash soil mixture finally discharged by the equipment meets the set ratio, a baffle 15 is fixed on the support frame 1 above the discharge plate 6 in this embodiment. The baffle 15 is arranged between the screen drum 41 and the discharge port 53 of the ash soil conveyor 5, and the baffle 15 is tilted forward, so that the baffle 15, the support frame 1 and the discharge plate 6 form a temporary storage chamber 16 for the raw soil material. At the same time, there is a gap between the lower end of the baffle 15 and the discharge plate 6, and the gap forms a diversion channel 17. When the raw soil material is screened by the drum screen 31 and the screen drum 41, it falls down into the temporary storage chamber 16. In the storage cavity 16, after a certain amount of raw soil material is stored in the cavity, the ash soil is discharged from the discharge port 53 of the ash soil conveyor 5 onto the discharge plate 6. At this time, the vibrator 81 on the discharge plate 6 is started. As the discharge plate 6 vibrates, the diversion channel 17 between the discharge plate 6 and the baffle 15 forms a continuous opening and closing state, that is, a continuous action of opening and closing, so that the raw soil material in the temporary storage cavity 16 is peristaltically pumped out from the diversion channel 17 and mixed with the ash soil. In this way, the amount of ash soil added can be determined by controlling the flow rate of the raw soil material sprayed out, thereby ensuring the addition ratio of ash soil and raw soil, and ensuring that the finished mixture meets the requirements.

[0042] The arrangement of this embodiment ensures the accuracy of the mixing ratio of ash soil and raw soil through the design of a dynamic flow control structure, wherein the temporary storage chamber 16 formed by the baffle 15 and the discharge plate 6 forms a temporary storage area for raw soil, and the physical quantification of the single processing amount is realized through the volume of the cavity. The discharge port 53 of the ash soil conveyor 5 is independently set to ensure that the ash soil delivery path is separated from the raw soil temporary storage area to avoid pre-mixing interference. The vibrator 81 drives the discharge plate 6 to produce a reciprocating motion with controllable amplitude, so that the diversion channel 17 forms a periodic opening and closing gap. When the raw soil passes through the gap, it is subjected to shear force to form a peristaltic extrusion effect. The peristaltic extrusion of the raw soil and the free fall of the ash soil are alternately mixed on the discharge plate 6 to achieve the primary mixing effect, and the primary mixed material is subjected to secondary stirring by the screw conveyor to effectively improve the mixing effect of the material.

[0043] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to solve the difficult problem of foundation soil treatment through an integrated design of two-stage crushing and dynamic screening. The equipment uses a drum screen and a rotating crushing knife to form a primary crushing unit to achieve the breakup and preliminary screening of the soil material; the innovatively designed arc-shaped rolling plate and screen drum form a secondary fine crushing unit, which crushes the oversized soil material through progressive extrusion, effectively ensuring the screening quality. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A soil crushing and screening device for foundation improvement, characterized by: It includes a main shaft, a support frame, and a crushing assembly, a rolling assembly, a discharge plate and a discharge assembly arranged on the support frame. The crushing assembly includes a drum screen, a protective plate and a crushing knife; the drum screen is rotatably arranged on the support frame, and a leakage plate is provided at intervals on the outside of the drum screen; multiple groups of crushing knives are fixedly sleeved on the main shaft along the circumference, and are used for preliminary breaking up and screening of the raw soil material in the screen drum. The main shaft is concentrically sleeved in the screen drum, and its end is transmission-connected to the driving source; the rolling assembly includes a screen drum, a connecting seat, a rolling plate and a scraper, and the screen drum is fixedly arranged on the support frame, and is sleeved outside the main shaft at intervals and is correspondingly connected to the output end of the drum screen. The bottom of the screen drum is evenly provided with mesh holes; the connecting seat is fixedly sleeved on the main shaft, and the outer ends of the connecting rods on the connecting seat are respectively fixed with rolling plates and scrapers, and the soil blocks in the screen drum are crushed by the rolling plates, and the loose soil covering the inner wall of the screen drum is scraped up by the scrapers; the discharge plate is arranged below the drum screen and the screen drum, and is elastically installed on the support frame at an angle downward, and the ash conveyor is arranged above the discharge plate, with its central axis transmission-connected with the main shaft, and its discharge port faces the discharge plate; the discharge assembly is arranged at the output end of the discharge plate, for receiving the primary mixture of plain soil and ash soil unloaded from the discharge plate, and discharging the primary mixture after mixing it evenly.

2. The foundation improvement soil crushing and screening equipment according to claim 1, characterized in that: The rolling plate is in an arc-shaped structure, and the distance between the rolling plate and the wall of the screen drum gradually decreases from wide to narrow, and the end of the scraper is in contact with the inner wall of the screen drum.

3. The soil crushing and screening equipment for foundation improvement according to claim 1 or 2, characterized in that: A vibrator is fixedly installed on the bottom of the stripper plate, and vibration springs are symmetrically fixed on the bottoms of the front and rear ends of the stripper plate, and the bottoms of the vibration springs are fixed to the support frame.

4. The foundation improvement soil crushing and screening equipment according to claim 1, characterized in that: Rotating sleeves are evenly fixed on the main shaft in the drum screen, and connecting rods are fixed on each rotating sleeve along the circumference. The connecting rods extend outward in a dispersed manner, and the crushing knives are evenly fixed on the connecting rods by bolts.

5. The foundation improvement soil crushing and screening equipment according to claim 1, characterized in that: The ash and soil conveyor includes a conveying auger and a shell. The conveying auger is arranged in the shell. The central shaft on the auger is connected to the main shaft for transmission. The central shaft extends to the outside of the shell for transmission connection to the driving source. A feed port is provided on the shell, and a discharge port is provided on the side of the shell close to the screen drum, and the discharge port corresponds to the discharge plate.

6. The ground improvement soil crushing and screening equipment according to claim 1, characterized in that: The discharge assembly includes a screw conveyor, and the feed port of the screw conveyor is correspondingly connected to the output end of the discharge plate.

7. The ground improvement soil crushing and screening equipment according to claim 1, characterized in that: The support frame is arranged on the vehicle body, and the bottom of the vehicle body is provided with moving wheels and a hydraulic jack.

8. The ground improvement soil crushing and screening equipment according to claim 7, characterized in that: A conveyor belt is provided on the vehicle body below the discharge assembly, and the conveyor belt corresponds to the output end of the discharge assembly.

9. The ground improvement soil crushing and screening equipment according to claim 1, characterized in that: A cleaning brush is symmetrically provided on the top of the leakage plate, and the brush head of the cleaning brush contacts the drum screen to clean the mesh on the drum screen to prevent clogging.

10. The soil crushing and screening equipment for foundation improvement according to claim 1, characterized in that: The support frame is provided with a driving motor, an output end of the driving motor is fixed with a driving gear, an end portion of the driving shaft is fixedly sleeved with a driven gear, and the driven gear and the driving gear are connected via a belt transmission.

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