Soil crushing and sieving device

Abstract

The utility model discloses a crushed soil sieving device which comprises a shell, a crushing module, a sieving module, a storage device and a recovery module, the crushing module, the sieving module, the storage device and the recovery module are installed in the shell, the output end of the crushing module is in butt joint with the sieving module, the storage device is arranged below the sieving module, and the sieving module is rotatably and obliquely arranged in the shell; the recycling module comprises a collecting frame, a telescopic rod, a guide rail and a first driving motor, the guide rail is installed above the smashing module, the telescopic rod is slidably arranged on the guide rail and driven by the first driving motor to move on the guide rail, the collecting frame is installed at the output end of the telescopic rod, and the telescopic rod is used for conveying the collecting frame to be in butt joint with the screening module. Or the collecting frame is conveyed to the position above the smashing module, and a third controllable door is arranged at the lower end of the collecting frame. The device disclosed by the utility model can be used for sequentially drying, crushing and screening, and finally storing and taking out the soil sample, so that the soil sample can be ensured to be dry without damaging the structure of the soil sample, and the utilization rate of the soil sample is improved by utilizing the recycling module.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering, in particular to a soil crushing and screening device. Background Art

[0002] Soil crushing and screening are essential processes in geotechnical engineering experiments, and are often used to treat soil samples before laboratory research. Common soil crushing and screening machines used in geotechnical engineering experiments include wheeled soil crushing and screening machines, crawler-type soil crushing and screening machines, and hand-held soil crushing and screening machines. However, since traditional soil crushing and screening machines require a lot of manpower, and the crushing and screening of soil samples are not complete, this also leads to the waste of unscreened soil samples, thereby increasing the cost of the experiment.

[0003] Therefore, there is an urgent need for a soil crushing and screening device to solve the problem that during the soil sample processing process, the crushing and screening of the soil sample are not complete, thereby resulting in the waste of the unscreened soil sample. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a soil crushing and screening device to solve the problem that in the soil sample processing process, the soil sample is not completely crushed and screened, thereby causing the unscreened soil sample to be wasted.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A soil crushing and screening device, characterized in that it comprises a housing, and a crushing module, a screening module, a storage device and a recovery module installed in the housing, wherein the input end of the crushing module is used to receive soil, and the output end is connected to the screening module, a storage device is provided below the screening module, and the screening module is rotatably and tiltably arranged in the housing;

[0007] The recycling module includes a collecting frame, a telescopic rod, a guide rail and a first driving motor. The guide rail is installed inside the shell and is located above the crushing module. The telescopic rod is slidably arranged on the guide rail. The telescopic rod is driven to move on the guide rail by the first driving motor. The collecting frame is installed at the output end of the telescopic rod. The telescopic rod is used to transport the collecting frame to the downwardly inclined end of the docking screening module, or to transport the collecting frame to the top of the crushing module. A third controllable door is provided at the lower end of the collecting frame.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] Furthermore, it also includes a drying chamber and a first conveyor belt, the drying chamber is installed on the top of the shell, the upper end of the drying chamber is provided with a feeding port, the lower end of the drying chamber is connected to the interior of the shell and is provided with a first controllable door for discharging, and a first conveyor belt is installed inside the shell and below the first controllable door through a first conveyor belt fixing rod, the output end of the first conveyor belt is connected to the crushing module, and the first conveyor belt is used to receive the soil dried in the drying chamber and transport it to the crushing module.

[0010] Furthermore, the drying chamber includes a feeding door, a heating plate and a data cable. Several heating plates are arranged around the side wall of the drying chamber. The heating plates are connected to a power supply via a data cable. A rotatable feeding door is installed at the upper feeding port of the drying chamber. A door handle is provided on the feeding door.

[0011] Furthermore, the inner wall of the drying chamber is paved with heat sinks.

[0012] Furthermore, it also includes a second conveyor belt, which is installed inside the shell and at the output end of the crushing module through a third conveyor belt fixing rod. The output end of the second conveyor belt is connected to the screening module, and the second conveyor belt is used to receive the soil crushed by the crushing module and transport it to the screening module.

[0013] Furthermore, it also includes a third conveyor belt, which is installed inside the shell and at the lower end of the screening module after it is tilted through a second conveyor belt fixing rod. The output end of the third conveyor belt is used to dock with the recovery module. The third conveyor belt is used to receive the soil dumped out by the screening module and transport it to the recovery module; the telescopic rod is used to transport the collecting frame to the output end of the third conveyor belt, or to transport the collecting frame to the top of the crushing module.

[0014] Furthermore, the screening module includes a circular screening disc, a circular screen structure, a cross-shaped rotating blade, a central rotating device and a rotating motor. The screening disc is rotatably mounted inside the shell through a rotating fixing rod, and the rotating fixing rod is driven to rotate by the rotating motor. The lower end of the screening disc is detachably mounted with a screen structure, and a central rotating device is mounted at the center of the screen structure. The central rotating device is connected to the center of the cross-shaped rotating blade and is used to drive the rotating blade to rotate.

[0015] Furthermore, a second controllable door is installed at the downwardly inclined end of the screening plate.

[0016] Furthermore, the crushing module is installed inside the shell through a fixing rod, the upper input end of the crushing module is a trumpet-shaped feeding funnel, the lower output end of the crushing module is a rectangular discharge port, the interior of the crushing module is hexagonal in shape and is provided with seven soil crushing columns, each soil crushing column is divided into five layers, each layer is provided with eight soil crushing blocks, the spacing between the same layer of soil crushing blocks between two adjacent soil crushing columns is fixed at 0.3 mm, and the soil crushing column is driven and operated by a second drive motor.

[0017] Furthermore, it also includes a control console, which is installed on the shell and is electrically connected to the crushing module, the screening module and the recovery module respectively.

[0018] The beneficial effects of the utility model are:

[0019] After the utility model crushes the soil by the crushing module, the required test soil is screened out by the screening module. When there is soil that cannot be screened out in the screening module, the first driving motor can be used to drive the telescopic rod to move along the guide rail as needed, and the collecting frame can be driven to move by the telescopic rod until the collecting frame is moved to the end where the screening module is to be tilted. Then the screening module can be rotated to achieve the tilting of the screening module, thereby dumping the unscreened soil in the screening module into the collecting frame, and then the first driving motor and the telescopic rod are used in cooperation to transport the collecting frame to the top of the crushing module. At this time, the third controllable door at the lower end of the collecting frame is opened, and the soil in the collecting frame is put back into the crushing module for further re-crushing, thereby avoiding the problem that the crushing and screening of the soil sample are not complete during the soil sample processing, thereby causing the unscreened soil sample to be wasted.

[0020] The working principle of the utility model device is simple and clear. When a soil sample is placed in the device, the steps of drying, crushing, and screening can be carried out in sequence, and finally stored and taken out. In this process, the soil sample can be kept dry without damaging the structure of the soil sample, and the utilization rate of the soil sample is improved by using a recycling module. The device has low energy, variable sieve hole size, variable soil crushing column speed, and is equipped with a drying device, which is suitable for many scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a soil crushing and screening device proposed by the utility model;

[0022] Figure 2 This is a structural side view of a soil crushing and screening device proposed by the utility model;

[0023] Figure 3 This is a structural schematic diagram of a recovery module of a soil crushing and screening device proposed by the utility model;

[0024] Figure 4 This is a structural cross-sectional view of a recovery module of a soil crushing and screening device proposed by the utility model;

[0025] Figure 5 This is a structural schematic diagram of a drying chamber of a soil crushing and screening device proposed in the utility model;

[0026] Figure 6 This is a top view of the structure of a screening module of a soil crushing and screening device proposed by the utility model;

[0027] Figure 7 A schematic diagram of the structure of a second controllable door of a screening module of a soil crushing and screening device proposed in the utility model;

[0028] Figure 8 This is a structural schematic diagram of a crushing module of a soil crushing and screening device proposed in the utility model;

[0029] Fig. 9 This is a structural cross-sectional view of a crushing module of a soil crushing and screening device proposed by the utility model.

[0030] Figure numerals: 1. drying chamber, 2. control console, 3. first controllable door, 4. first conveyor belt, 5. feeding funnel, 6. crushing module, 7. second conveyor belt, 8. screening module, 9. third conveyor belt, 10. storage device, 11. collecting frame, 12. telescopic rod, 13. guide rail, 14. heating plate, 15. fixing rod, 16. first conveyor belt fixing rod, 17. rotating fixing rod, 18. center rotating device, 19. rotating blade, 20. screen structure, 21. second conveyor belt fixing rod, 22. second controllable door, 23. third conveyor belt fixing rod, 24. third controllable door, 25. door handle, 26. feeding door, 27. heat sink, 28. data cable. DETAILED DESCRIPTION

[0031] The utility model is described in detail below with reference to the accompanying drawings.

[0032] As attached Figure 1 and attached Figure 2 As shown, a soil crushing and screening device according to an embodiment of the utility model comprises a housing, and a crushing module 6, a screening module 8, a storage device 10 and a recovery module installed in the housing. The input end of the crushing module 6 is used to receive soil, and the output end is connected to the screening module 8. A storage device 10 for screened soil samples is provided below the screening module 8. An opening and closing door for taking materials from the storage device 10 is provided on the side wall of the housing. The screening module 8 is rotatably and tiltably arranged in the housing.

[0033] As attached Figure 3 and attached Figure 4As shown, the recycling module includes a collecting frame 11, a telescopic rod 12, a guide rail 13 and a first driving motor. The guide rail 13 is installed inside the shell and is located above the crushing module 6. The telescopic rod 12 is slidably arranged on the guide rail 13. The telescopic rod 12 is driven by the first driving motor to move on the guide rail 13. The output end of the telescopic rod 12 is installed with the collecting frame 11. The telescopic rod 12 is used to transport the collecting frame 11 to the downward inclined end of the docking screening module 8, or to transport the collecting frame 11 to the top of the crushing module 6. The lower end of the collecting frame 11 is provided with a third controllable door 24.

[0034] After the utility model crushes the soil by the crushing module 6, the required test soil is screened out by the screening module 8. When there is soil that cannot be screened out in the screening module 8, the first driving motor can be used to drive the telescopic rod 12 to move along the guide rail 13 as needed, and the collecting frame 11 is driven to move by the telescopic rod 12 until the collecting frame 11 is moved to the end where the screening module 8 is inclined. Then the screening module 8 can be rotated to achieve the inclination of the screening module 8, so that the unscreened soil in the screening module 8 is dumped into the collecting frame 11, and then the first driving motor and the telescopic rod 12 are used in cooperation to transport the collecting frame 11 to the top of the crushing module 6. At this time, the third controllable door 24 at the lower end of the collecting frame 11 is opened, and the soil in the collecting frame 11 is put back into the crushing module 6 for further re-crushing, thereby avoiding the problem that the crushing and screening of the soil sample are not complete during the soil sample processing, thereby causing the unscreened soil sample to be wasted.

[0035] In another specific embodiment, it also includes a drying chamber 1 and a first conveyor belt 4. The drying chamber 1 is installed on the top of the shell. The upper end of the drying chamber 1 is provided with a feed port. The lower end of the drying chamber 1 is connected to the inside of the shell and is provided with a first controllable door 3 for discharging. The first conveyor belt 4 is installed inside the shell and below the first controllable door 3 through a first conveyor belt fixing rod 16. The output end of the first conveyor belt 4 is connected to the crushing module 6. The first conveyor belt 4 is used to receive the soil dried by the drying chamber 1 and transport it to the crushing module 6. In this way, the drying chamber 1 can be used to dry the soil before crushing, so as to ensure the crushing effect of the soil.

[0036] As attached Figure 5 As shown, the drying chamber 1 includes a feed door 26, a heating plate 14 and a data line 28. Several heating plates 14 are arranged around the side wall of the drying chamber 1. The heating plates 14 are connected to the power supply through the data line 28. A rotatable feed door 26 is installed at the upper feed port of the drying chamber 1. The feed door 26 is provided with a door handle 25. In this embodiment, the drying temperature can be fixed at 105 degrees, and the drying time can be adjusted between 8 and 12 hours.

[0037] In the present embodiment, a plurality of exhaust holes may be provided on the feed door 26 to facilitate the exhaust of steam during drying.

[0038] The inner wall of the drying chamber 1 is provided with a heat sink 27 , so that the heat sink 27 can be used to increase the heating effect of the heating plate 14 .

[0039] In another specific embodiment, a second conveyor belt 7 is further included. The second conveyor belt 7 is installed inside the housing and at the output end of the crushing module 6 through a third conveyor belt fixing rod 23. The output end of the second conveyor belt 7 is docked with a screening module 8. The second conveyor belt 7 is used to receive the soil crushed by the crushing module 6 and transport it to the screening module 8. In this way, the second conveyor belt 7 can be used as a buffer during use to prevent the crushed stones with impact force in the crushing module 6 from directly impacting the screening module 8, causing damage to the screening module 8. At the same time, in this embodiment, both sides of the second conveyor belt 7 can also be provided with material blocking plates as needed.

[0040] The third conveyor belt 9 is also included. The third conveyor belt 9 is installed inside the housing and at the lower end of the screening module 8 after tilting through the second conveyor belt fixing rod 21. The output end of the third conveyor belt 9 is used to dock with the recovery module. The third conveyor belt 9 is used to receive the soil dumped by the screening module 8 and transport it to the recovery module; the telescopic rod 12 is used to transport the collection frame 11 to the output end of the third conveyor belt 9, or to transport the collection frame 11 to the top of the crushing module 6. In this way, when in use, the position and angle of the third conveyor belt 9 can be preset to facilitate the collection of materials from the screening module 8, and the position of the collection frame 11 can be adjusted to facilitate the collection of materials.

[0041] As attached Figure 6 As shown, in another specific embodiment, the screening module 8 includes a circular screening disc, a circular screen structure 20, a cross-shaped rotating blade 19, a central rotating device 18 and a rotating motor. The screening disc is rotatably mounted inside the housing through a rotating fixed rod 17. The rotating fixed rod 17 is driven to rotate by a rotating motor. The rotation angle can be set to no more than 45 degrees. The lower end of the screening disc is detachably mounted with a screen structure 20. The center of the screen structure 20 is mounted with a central rotating device 18. The central rotating device 18 is connected to the center of the cross-shaped rotating blade 19 and is used to drive the rotating blade 19 to rotate. In this way, when in use, the rotating blade 19 can be used to screen the crushed soil into the storage device 10 below the screening module 8. At the same time, when dumping, the rotating blade 19 can also assist in the dumping of the crushed stone. In this embodiment, the detachable and replaceable screen structure 20 is equipped with screens with apertures of 9.5 mm, 4.75 mm, 2.36 mm, 1.18 mm, 0.6 mm, 0.3 mm, and 0.15 mm.

[0042] As attached Figure 7As shown, a second controllable door 22 is installed at one end of the sieving disc that is tilted downward. In this way, when in use, the material can be discharged stably and conveniently by opening the second controllable door 22. At the same time, when sieving, closing the second controllable door 22 can not affect the sieving effect.

[0043] As attached Figure 8 and attached Fig. 9 As shown, in another specific embodiment, the crushing module 6 is installed inside the shell through a fixing rod 15, the upper input end of the crushing module 6 is a trumpet-shaped feeding funnel 5, and the lower output end of the crushing module 6 is a rectangular discharge port, which is used to stably discharge materials to the second conveyor belt 7. The interior of the crushing module 6 is hexagonal and has seven soil crushing columns, each of which is divided into five layers, and each layer is provided with eight soil crushing blocks. The spacing between the soil crushing blocks in the same layer between two adjacent soil crushing columns is fixed to 0.3mm, and the soil crushing columns are driven by the second driving motor. Because the energy of traditional soil crushers is too large, it will easily destroy the soil sample structure when crushing the soil. In this solution, the soil crushing blocks are used. First, the contact area with the soil sample is relatively large, which has a protective effect on the structure of the soil sample. Secondly, the soil crushing blocks are mainly crushed by rolling rather than cutting and beating, and the soil crushing energy is low.

[0044] In another specific embodiment, a control console 2 is further included, which is mounted on the housing and is electrically connected to the crushing module 6, the screening module 8 and the recycling module. Specifically, the control console 2 can be used to control the operation of the first drive motor and the telescopic rod 12 in the recycling module, the opening and closing of the first controllable door 3, the second controllable door 22 and the third controllable door 24, the operation of the first conveyor belt 4, the second conveyor belt 7 and the third conveyor belt 9, the start and stop of the heating plate 14, the rotation of the rotating motor, the rotation of the central rotating device 18, the operation of the second drive motor of the crushing module 6, etc.

[0045] In this embodiment, the heating plate 14 in the drying chamber 1 is electrically connected to the control console 2 via the data line 28, and other mechanisms can also be electrically connected to the control console 2 via the data line 28 as needed. The second drive motor of the crushing module 6 can be set to three speeds, and each speed will not damage the soil sample, which can reflect the low energy characteristics.

[0046] The method of using the utility model device:

[0047] a. Filling soil sample

[0048] Open the feeding door 26 of the drying chamber 1, put the obtained soil sample evenly into the drying chamber 1, and then close the feeding door 26.

[0049] b. Drying soil samples

[0050] After pouring the soil sample into the drying chamber 1, the control console 2 can be operated to set the drying temperature and time. After the settings are completed, the heating plate 14 and other devices can start working; after the drying is completed, the control console 2 is operated to open the first controllable door 3, and the dried soil sample is poured onto the first conveyor belt 4, and the first conveyor belt 4 can transport the dried soil sample to the crushing module 6; in this solution, the purpose of first drying the soil sample is to prevent the soil sample from being too wet and agglomerated in the crushing module 6 or blocking the screen in the screening module 8, thereby greatly reducing the work efficiency.

[0051] c. Crushed soil

[0052] After turning on the power, the rotation speed of the 7 soil crushing columns of the crushing module 6 can be controlled by the control console 2, and three gears can be set as needed and adjusted according to different needs; among them, the 6 external soil crushing columns and the 1 central soil crushing column are arranged compactly and have small pores, and there are five layers of crushed soil blocks on one soil crushing column, among which the 1st, 3rd and 5th layers of crushed soil blocks are arranged the same, the 2nd and 4th layers of crushed soil blocks are arranged the same, and the 1st, 3rd and 5th layers are arranged alternately with the 2nd and 4th layers, so the soil crushing efficiency is higher; the upper opening of the crushing module 6 is large to ensure that the upper part can fully accept the soil samples on the conveyor belt and the soil samples transported by the recovery module, and the lower opening is small to ensure that the soil samples can be completely transported to the screening module 8 by the second conveyor belt 7; when the soil sample enters the crushing module 6, the 7 soil crushing columns will repeatedly crush the soil sample in the crushing module 6 to ensure the soil crushing efficiency, and it can be discharged after the soil crushing is completed.

[0053] d.Sieving

[0054] Before screening, the required soil sample size can be determined in advance to determine the size of the screen aperture, and then the screen on the screen structure 20 can be replaced as needed or a different screen structure 20 can be directly replaced; if a different soil sample size is required, the power can be turned off as needed, the screen structure 20 can be taken out, and the screen structure 20 with the aperture corresponding to the required soil sample size can be placed in as needed at any time and then the power can be turned on. When in use, the central rotating device 18 drives the cross-shaped rotating blade 19 with 4 blades to start rotating at a set speed. After the soil sample reaches the screening module 8 through the second conveyor belt 7, it will be pushed to screen by the rotating blade 19, wherein the speed of the rotating blade 19 can be controlled by the control console 2, and the soil sample falls into the storage device 10 after passing through the screen. There must be soil samples in the screening module 8 that cannot pass through the screen, and the screening module 8 can be rotated by a small angle by rotating the fixed rod 17 to pour the unscreened soil sample into the recovery module.

[0055] e. Circulation soil samples

[0056] The purpose of the recycling module design is to circulate the process of crushing and screening to completely process the soil samples that are not completely crushed and screened to avoid unnecessary waste. The soil samples are transported to the collection frame 11 of the recycling module through the third conveyor belt 9. The collection frame 11 is provided with a third controllable door 24 at the lower end and an unsealed feed port at the upper end. After receiving the soil samples, the collection frame 11 can be controlled by the vertical telescopic rod 12 to move up and down and the horizontal guide rail 13 to move the collection frame 11 left and right to transport the collection frame 11 to the top of the crushing module 6. The third controllable door 24 can be opened to pour the incompletely processed soil samples back into the crushing module 6 for crushing and screening again.

[0057] f. Sampling

[0058] A storage device 10 for holding soil samples is installed under the screen. After the soil samples are screened, the soil samples will fall into the storage device 10. After the entire drying, crushing and screening process is completed, the power supply can be turned off, the door can be opened, and the storage device 10 can be taken out.

[0059] The working principle of the utility model device is simple and clear. When a soil sample is placed in the device, the steps of drying, crushing, and screening can be carried out in sequence, and finally stored and taken out. In this process, the soil sample can be kept dry without damaging the structure of the soil sample, and the utilization rate of the soil sample is improved by using a recycling module. The device has low energy, variable sieve hole size, variable soil crushing column speed, and is equipped with a drying device, which is suitable for many scenarios.

[0060] The utility model device has the following beneficial effects:

[0061] 1. All-in-one device, does not require too much manpower, easy and simple, high efficiency. 2. Adjustable screen size, can efficiently obtain the required soil sample. 3. Equipped with a drying device to prevent the soil sample from being too wet and blocking the sieve holes. 4. Low-energy soil crushing avoids soil damage. 5. Recycle and process soil samples, high utilization rate of soil samples, avoiding unnecessary waste of soil samples.

[0062] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. used in the utility model are only for the convenience of description and are not used to limit the scope of implementation of the utility model. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the utility model without substantially changing the technical content.

[0063] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A soil crushing and screening device, characterized in that: It comprises a shell, and a crushing module (6), a screening module (8), a storage device (10) and a recovery module installed in the shell, wherein the input end of the crushing module (6) is used to receive soil, and the output end is connected to the screening module (8), the storage device (10) is provided below the screening module (8), and the screening module (8) is rotatably and tiltably arranged in the shell; The recycling module comprises a collection frame (11), a telescopic rod (12), a guide rail (13) and a first drive motor. The guide rail (13) is installed inside a housing and is located above the crushing module (6). A telescopic rod (12) is slidably arranged on the guide rail (13). The telescopic rod (12) is driven by the first drive motor to move on the guide rail (13). The output end of the telescopic rod (12) is installed with a collection frame (11). The telescopic rod (12) is used to transport the collection frame (11) to a downwardly inclined end of the docking screening module (8), or to transport the collection frame (11) to the top of the crushing module (6). A third controllable door (24) is provided at the lower end of the collection frame (11).

2. A soil crushing and screening device according to claim 1, characterized in that: It also comprises a drying chamber (1) and a first conveyor belt (4), wherein the drying chamber (1) is mounted on the top of the shell, the upper end of the drying chamber (1) is provided with a material inlet, the lower end of the drying chamber (1) is connected to the interior of the shell and is provided with a first controllable door (3) for discharging materials, the first conveyor belt (4) is installed inside the shell and below the first controllable door (3) via a first conveyor belt fixing rod (16), the output end of the first conveyor belt (4) is connected to a crushing module (6), and the first conveyor belt (4) is used to receive the soil dried in the drying chamber (1) and transport it to the crushing module (6).

3. A soil crushing and screening device according to claim 2, characterized in that: The drying chamber (1) comprises a feeding door (26), a heating plate (14) and a data line (28). A plurality of heating plates (14) are arranged around the side wall of the drying chamber (1). The heating plates (14) are connected to a power source via the data line (28). A feeding door (26) that can be rotatably opened is installed at the feeding port at the upper end of the drying chamber (1). A door handle (25) is provided on the feeding door (26).

4. A soil crushing and screening device according to claim 3, characterized in that: The inner wall of the drying chamber (1) is provided with heat sinks (27).

5. The soil crushing and screening device according to claim 1, characterized in that: It also includes a second conveyor belt (7), which is installed inside the shell and at the output end of the crushing module (6) through a third conveyor belt fixing rod (23), and the output end of the second conveyor belt (7) is connected to the screening module (8), and the second conveyor belt (7) is used to receive the soil crushed by the crushing module (6) and transport it to the screening module (8).

6. A soil crushing and screening device according to claim 5, characterized in that: The invention also comprises a third conveyor belt (9), which is installed inside the shell body and at a lower end of the screening module (8) after tilting through a second conveyor belt fixing rod (21); the output end of the third conveyor belt (9) is used to dock with the recovery module; the third conveyor belt (9) is used to receive soil dumped from the screening module (8) and transport it to the recovery module; the telescopic rod (12) is used to transport the collection frame (11) to the output end of the third conveyor belt (9), or to transport the collection frame (11) to the top of the crushing module (6).

7. The soil crushing and screening device according to claim 1, characterized in that: The screening module (8) comprises a circular screening disc, a circular screen structure (20), a cross-shaped rotating blade (19), a central rotating device (18) and a rotating motor. The screening disc is rotatably mounted inside a housing via a rotating fixing rod (17). The rotating fixing rod (17) is driven to rotate by the rotating motor. The lower end of the screening disc is detachably mounted with the screen structure (20). The center of the screen structure (20) is mounted with the central rotating device (18). The central rotating device (18) is connected to the center of the cross-shaped rotating blade (19) and is used to drive the rotating blade (19) to rotate.

8. The soil crushing and screening device according to claim 7, characterized in that: A second controllable door (22) is installed at one end of the screening plate that is inclined downward.

9. The soil crushing and screening device according to claim 1, characterized in that: The crushing module (6) is mounted inside the housing via a fixing rod (15); the upper input end of the crushing module (6) is a trumpet-shaped feeding funnel (5); the lower output end of the crushing module (6) is a rectangular discharge port; the interior of the crushing module (6) is in a hexagonal shape and is provided with seven soil crushing columns; each soil crushing column is divided into five layers, each layer is provided with eight soil crushing blocks; the spacing between soil crushing blocks on the same layer between two adjacent soil crushing columns is fixed at 0.3 mm; the soil crushing columns are driven to operate by a second drive motor.

10. The soil crushing and screening device according to claim 1, characterized in that: It also comprises a control console (2), which is mounted on the housing and is electrically connected to the crushing module (6), the screening module (8) and the recovery module respectively.

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