Backfill soil screening device

Abstract

The utility model provides a backfill soil screening device. The backfill soil screening device comprises a box body, a plurality of screening plates and a vibration assembly. Wherein the box body is of a hollow structure with an upward opening, and the box body is provided with a discharging port facing the rear side and a plurality of through ports located above the discharging port and distributed up and down. The sieve plates are arranged in the box body side by side in the vertical direction and correspond to the through openings one to one, and the upper side faces of the corresponding sieve plates are coplanar with the inner bottom faces of the through openings; in addition, each sieve plate is provided with a plurality of sieve holes, and the inner diameter of the sieve holes corresponding to the sieve plate located on the upper side is larger than that of the sieve holes corresponding to the sieve plate located on the lower side. The vibration assembly is arranged on the box body and connected with the sieve plates so that the sieve plates can be vibrated at the same time, soil materials on the sieve plates can move towards the through opening in the inclined direction, and the soil materials smaller than the sieve holes in size can pass through the sieve holes in the lower side. According to the backfill soil screening device, soil materials with different particle sizes can be recycled at the same time, and the overall efficiency of backfill soil processing is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of backfill soil processing, and in particular relates to a backfill soil screening device. Background Art

[0002] During the construction of the traffic monitoring system, it is necessary to bury pipelines on the road surface to lay the corresponding power lines and signal lines; after the laying is completed and the pipelines are buried in order, it is necessary to backfill 50mm sand and mud (or soil) into the pipeline pit to fill the pit mouth and avoid damage to the pipeline. Among them, the soil quality inspection of the backfill soil (type, particle size, water content, presence of debris, etc.) is very critical and will directly affect the strength of the road surface after backfilling.

[0003] The inventors found that the common backfill soil screening method on the market is to use a sieve plate manually, and its efficiency is difficult to guarantee; moreover, the soil materials eliminated after screening are also large and small, and it is impossible to place them in batches into the ports of processing machines of corresponding specifications (50mm-100mm soil materials are processed by roller crushing, and soil materials above 100mm are processed by mechanical crushing) to reduce the particle size. Utility Model Content

[0004] The embodiment of the present application provides a backfill soil screening device, which is intended to efficiently screen backfill soil and simultaneously recycle soil materials of different particle sizes to ensure the overall efficiency of backfill soil processing.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] A backfill soil screening device is provided, comprising:

[0007] The box body is used to be fixed on a horizontal plane, and adopts a structure with a hollow interior and an opening facing upward; the box body has a discharge port, and the direction of the discharge port is defined as from front to rear; the box body also has a plurality of through openings located on the upper side of the discharge port, spaced apart in the up-down direction and all facing the rear side;

[0008] A plurality of sieve plates are arranged in parallel in the vertical direction inside the box body, all of which are located on the upper side of the discharge port and correspond to the plurality of through ports one by one; each of the sieve plates is hinged to the box body in the left-right direction, and the upper side surface of each of the sieve plates is inclined downward from front to back and is coplanar with the inner bottom surface of the corresponding through port; and

[0009] A vibration assembly is arranged on the box body and connected to the plurality of sieve plates to drive the plurality of sieve plates to vibrate in the up-down direction so that the soil on the upper side of the sieve plates moves toward the through opening;

[0010] Each of the sieve plates has a plurality of sieve holes, and the inner diameter of the sieve holes corresponding to the sieve plate on the upper side is greater than the inner diameter of the sieve holes corresponding to the sieve plate on the lower side.

[0011] In a possible implementation, the vibration component includes:

[0012] A plurality of rotating rollers are arranged on the box body at intervals along the up-down direction, and their axial directions are parallel to the left-right direction, and they are all connected to the box body for rotation along the left-right direction; each of the rotating rollers has a driving part located inside the box body and eccentrically arranged therewith; and

[0013] A rotating motor is fixedly arranged on the box body, its power output axis is parallel to the left and right direction, and it is drivingly connected to one of the rotating rollers;

[0014] There is a transmission structure between the plurality of rotating rollers; when any one of the rotating rollers rotates, the transmission structure can drive the other rotating rollers to rotate synchronously; and when the rotating rollers rotate, the driving unit can drive the screen plate to swing upward.

[0015] In a possible implementation, the transmission structure includes:

[0016] a plurality of first gears corresponding to the plurality of rotating rollers one by one; the corresponding first gears are coaxially connected to the rotating rollers, and the first gears are located outside the box; a transmission gap is formed between two adjacent first gears in the up-down direction; and

[0017] A plurality of second gears are arranged in a one-to-one correspondence in the plurality of transmission gaps and are arranged in parallel with the first gears; each of the second gears is rotationally connected to the housing, and adjacent first gears are meshed with the second gears.

[0018] In a possible implementation, a protective shell is detachably connected to the box body, and the protective shell cover is arranged on the outside of the transmission structure.

[0019] In a possible implementation, the backfill soil screening device further includes:

[0020] A plurality of guide seats are arranged at intervals on the outer side of the box body along the vertical direction, and correspond to the plurality of through openings one by one, and are all fixedly connected to the rear side of the box body; wherein the upper side of each guide seat adopts an inclined surface extending toward the rear side, and is coplanar with the inner bottom surface of the corresponding through opening; and each guide seat has a material guide port penetrating along the vertical direction;

[0021] A plurality of blocking members are slidably disposed on the upper side surfaces of the plurality of guide seats in a one-to-one correspondence, and the sliding directions of the blocking members are parallel to the axial direction of the through opening; and

[0022] A linear drive assembly is disposed on the box body and is connected to the plurality of blocking members to drive the plurality of blocking members to be inserted into or withdrawn from the plurality of through openings at the same time;

[0023] Wherein, when the blocking member is inserted into the through opening, the blocking member can restrict soil from passing through the through opening and can also be connected with the upper side surface of the screen plate; when the blocking member is withdrawn from the through opening, the blocking member can move to avoid the material guide port.

[0024] In a possible implementation, the lower side of the blocking member has a gasket made of elastic material suitable for connecting with the upper side of the sieve plate;

[0025] When the vibration assembly drives the screen plate to swing, the corresponding gasket undergoes elastic deformation.

[0026] In a possible implementation, each of the guide seats further includes:

[0027] The drawer is connected to the lower side of the guide seat by sliding along the left-right direction. It adopts a structure with a hollow interior and an upward opening, and is suitable for moving to communicate with the material guide port to recover soil materials discharged from the material guide port.

[0028] In a possible implementation, each of the blocking members has a convex shaft extending outward in the left-right direction and slidably connected to the guide seat, and the sliding direction of the convex shaft and the guide seat is inclined from front to back and downward; the linear drive assembly includes:

[0029] A linear cylinder is fixedly mounted on the housing, and its power output axis is parallel to the front-rear direction; and

[0030] The sliding member is slidably arranged at the rear side of the box body in the front-to-back direction, and has a plurality of strip holes arranged at intervals in the up-down direction and all penetrating in the left-right direction, and each of the strip holes extends in the up-down direction.

[0031] Among them, the multiple strip holes correspond one by one to the multiple blocking parts, and the corresponding convex shafts are inserted into the strip holes; when the linear cylinder is started, the sliding part drives the multiple convex shafts to move in the front and rear directions, so that the convex shafts move along the length direction of the strip holes.

[0032] In a possible implementation, the inner bottom surface of the box body is an inclined surface; the inclined surface is inclined downward from front to back, and the inner bottom surface of the discharge port is arranged coplanar with the inclined surface.

[0033] In a possible implementation, the backfill soil screening device further includes:

[0034] The material storage box is used to be arranged on the rear side of the box body. It adopts a structure with a hollow interior and an opening facing upward, and its opening surface is located below the discharge port.

[0035] In the embodiment of the present application, soil is placed from the top of the box and falls into multiple sieve plates arranged from top to bottom in succession. Non-compliant soil falls onto different sieve plates through corresponding sieve holes, and the soil remaining on the upper sieve plate is larger. On this basis, the sieve plate can be vibrated in the up and down directions through the vibration assembly, so that the soil rolls downward along the inclined direction of the sieve plate to the opening and moves to the outside of the box through the opening. At the same time, soil that meets the requirements falls on the bottom of the box, so that the soil can be taken out from the discharge port.

[0036] Compared with the prior art, the backfill soil screening device provided in this embodiment can efficiently screen backfill soil and simultaneously recycle soil materials of different particle sizes, thereby ensuring the overall efficiency of backfill soil processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 One of the three-dimensional structural schematic diagrams of the backfill soil screening device provided in the embodiment of the present application;

[0038] Figure 2 The second schematic diagram of the three-dimensional structure of the backfill soil screening device provided in the embodiment of the present application;

[0039] Figure 3 The third schematic diagram of the three-dimensional structure of the backfill soil screening device provided in the embodiment of the present application;

[0040] Figure 4 A schematic cross-sectional view of a backfill soil screening device provided in an embodiment of the present application;

[0041] Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle frame A;

[0042] Figure 6 This is a schematic diagram of the exploded structure of the box used in the embodiment of the present application;

[0043] Figure 7 A partially enlarged schematic diagram of the box body and protective shell used in the embodiment of the present application under an explosion perspective;

[0044] Figure 8 A schematic diagram of the three-dimensional structure of the vibration assembly used in the embodiment of the present application;

[0045] Fig. 9This is a schematic cross-sectional view of the plugging member used in the embodiment of the present application;

[0046] Fig.10 This is a schematic diagram of the exploded structure of the guide seat and the blocking member used in the embodiment of the present application;

[0047] Explanation of the reference numerals: 1. Box body; 11. Discharge port; 12. Through port; 13. Protective shell; 2. Sieve plate; 21. Sieve hole; 3. Vibration assembly; 31. Rotating roller; 311. Driving unit; 32. Rotating motor; 4. Transmission structure; 41. First gear; 42. Second gear; 5. Guide seat; 51. Material guide port; 52. Drawer; 6. Sealing part; 61. Gasket; 62. Cam; 7. Linear drive assembly; 71. Linear cylinder; 72. Sliding part; 721. Strip hole; 8. Storage box. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] Please also read Figures 1 to 9 The backfill soil screening device provided in the present application is now described. The backfill soil screening device provided in the present application comprises a box body 1 , a plurality of sieve plates 2 and a vibration assembly 3 .

[0050] The box body 1 is used to be fixed on a horizontal plane, and has a hollow interior and an upward opening structure; the box body 1 has a discharge port 11. In this embodiment, for the sake of convenience, the direction of the discharge port 11 is defined as from front to back. Based on this, the box body 1 also has a plurality of through openings 12 located above the discharge port 11, spaced apart in the up-down direction, and all facing the back.

[0051] Multiple sieve plates 2 are arranged in parallel inside the box body 1 along the up and down direction, all of which are located on the upper side of the discharge port 11, and correspond one by one to multiple through openings 12; each sieve plate 2 is hinged to the box body 1 along the left and right direction, and the upper side surface of each sieve plate 2 is inclined downward from front to back, and is coplanar with the inner bottom surface of the corresponding through opening 12.

[0052] In the present embodiment, each sieve plate 2 has a plurality of sieve holes 21, and the inner diameter of the sieve holes 21 corresponding to the sieve plate 2 on the upper side is larger than the inner diameter of the sieve holes 21 corresponding to the sieve plate 2 on the lower side; in the present embodiment, there are three sieve plates 2; accordingly, after a batch of soil of different sizes is placed from the upper end of the box body 1, the soil will be divided into four parts, three parts of the soil are discharged through the three openings 12, and the other part of the soil is discharged through the discharge port 11; and, among the three parts of soil discharged through the three openings 12, the soil on the upper side is larger than the soil on the lower side.

[0053] The vibration assembly 3 is disposed on the box body 1 and connected to the plurality of sieve plates 2 to drive the plurality of sieve plates 2 to vibrate in the up-down direction and move the soil material on the upper side of the sieve plates 2 toward the through opening 12 .

[0054] In the embodiment of the present application, soil is placed from the top of the box 1, so that it falls into multiple sieve plates 2 arranged from top to bottom in turn, and non-compliant soil falls on different sieve plates 2 through corresponding sieve holes 21, and the soil remaining on the sieve plate 2 on the upper side is larger.

[0055] On this basis, the vibration component 3 can make the screen plate 2 vibrate in the up and down directions, so that the soil rolls downward along the inclined direction of the screen plate 2 to the opening 12, and moves to the outside of the box body 1 through the opening 12; at the same time, the soil that meets the requirements falls on the bottom surface of the box body 1, so that the soil can be taken out from the discharge port 11.

[0056] Compared with the prior art, the backfill soil screening device provided in this embodiment can efficiently screen backfill soil and simultaneously recycle soil materials of different particle sizes, thereby ensuring the overall efficiency of backfill soil processing.

[0057] In some embodiments, Figure 4 , Figure 7 and Figure 8 As shown, the vibration assembly 3 includes a plurality of rotating rollers 31 and a rotating motor 32 .

[0058] A plurality of rotating rollers 31 are arranged on the box body 1 at intervals along the up-down direction, and their axial directions are parallel to the left-right direction, and they are all connected to the box body 1 for rotation along the left-right direction; wherein, the plurality of rotating rollers 31 correspond to the plurality of sieve plates 2 one by one, and the corresponding rotating rollers 31 are located at the lower side of the sieve plate 2; each rotating roller 31 has a driving part 311 located inside the box body 1, eccentrically arranged therewith, and connected to the lower side of the sieve plate 2, specifically: the driving part 311 and the rotating roller 31 are integrally connected, and there is a gap between their central axes; the purpose of such design is that when the rotating roller 31 rotates around its own central axis, the driving part 311 rotates around the central axis of the rotating roller 31 as the axis to lift the sieve plate 2 or avoid the sieve plate 2; when the driving part 311 avoids the sieve plate 2, the sieve plate 2 is reset downward under the action of its own gravity.

[0059] The rotating motor 32 is fixedly arranged on the box body 1 , and its power output axis is parallel to the left-right direction, and it is drivingly connected with one of the rotating rollers 31 .

[0060] In this embodiment, there is a transmission structure 4 between the multiple rotating rollers 31; when any one of the rotating rollers 31 rotates, the transmission structure 4 can drive the other rotating rollers 31 to rotate synchronously; and when the rotating rollers 31 are driven to rotate by the rotating motor 32, the driving part 311 can drive the screen plate 2 to swing upward to achieve a regular vibration effect.

[0061] In some embodiments, Figure 7 As shown, the transmission structure 4 includes a plurality of first gears 41 and a plurality of second gears 42 .

[0062] The plurality of first gears 41 correspond to the plurality of rotating rollers 31 one by one; the corresponding first gears 41 are coaxially connected to the rotating rollers 31, and the first gears 41 are located outside the box 1; a transmission gap is formed between two adjacent first gears 41 in the vertical direction.

[0063] The plurality of second gears 42 are arranged one by one in the plurality of transmission gaps formed by the plurality of first gears 41 , and are arranged parallel to the first gears 41 ; each second gear 42 is rotationally connected to the housing 1 , and adjacent first gears 41 and second gears 42 are meshed.

[0064] In some embodiments, Figure 1 and Figure 7 As shown, a protective shell 13 is detachably connected to the box body 1, and the protective shell 13 is arranged to cover the outer side of the transmission structure 4, so as to protect the transmission structure 4.

[0065] In some embodiments, Figures 1 to 4 As shown, the backfill soil screening device also includes a plurality of guide seats 5 , a plurality of blocking members 6 and a linear drive assembly 7 .

[0066] A plurality of guide seats 5 are arranged at intervals along the vertical direction on the outer side of the box body 1, and they correspond to the plurality of through openings 12 one by one, and they are all fixedly connected to the rear side of the box body 1; wherein, the upper side of each guide seat 5 adopts an inclined surface extending toward the rear side, and is coplanar with the inner bottom surface of the corresponding through opening 12; and each guide seat 5 has a material guide opening 51 penetrating along the vertical direction. After the soil passes through the through opening 12, it first rolls on the inclined surface of the guide seat 5, and then enters the material guide opening 51 and is discharged through the material guide opening 51.

[0067] A plurality of blocking members 6 are slidably arranged one by one on the upper side surfaces of a plurality of guide seats 5, and their sliding directions are all parallel to the axial direction of the through opening 12; when the blocking member 6 moves toward the box body 1, the blocking member 6 can be inserted into the through opening 12 and close the through opening 12; when the blocking member 6 moves away from the box body 1, the blocking member 6 can withdraw from the through opening 12, so that the soil in the box body 1 can be discharged from the through opening 12.

[0068] The linear drive assembly 7 is disposed on the housing 1 and is connected to the plurality of blocking members 6 to drive the plurality of blocking members 6 to be inserted into or withdrawn from the plurality of through openings 12 at the same time.

[0069] It should be noted that when the blocking member 6 is inserted into the opening 12 , the blocking member 6 can not only restrict the soil from passing through the opening 12 , but also connect with the upper side of the sieve plate 2 ; when the blocking member 6 is withdrawn from the opening 12 , the blocking member 6 can move to avoid the material guide port 51 .

[0070] In some embodiments, Figure 4 As shown, the lower side of the blocking member 6 has a gasket 61 made of elastic material suitable for connecting with the upper side of the sieve plate 2.

[0071] By adopting the above technical solution, when the vibration assembly 3 drives the sieve plate 2 to swing, the corresponding gasket 61 undergoes elastic deformation, thereby providing a rebound force for the sieve plate 2, and this rebound force can cooperate with the gravity of the sieve plate 2 to enhance the vibration effect of the sieve plate 2.

[0072] In some embodiments, Figure 4 and Fig.10 As shown, each guide seat 5 further includes a drawer 52 .

[0073] The drawer 52 is connected to the lower side of the guide seat 5 in a sliding manner along the left-right direction, and has a structure with a hollow interior and an opening facing upward.

[0074] In actual use, the drawer 52 is suitable for moving to communicate with the material guide port 51 to recover the soil discharged from the material guide port 51; and the drawer 52 is also suitable for moving to a position away from the material guide port 51 to take out the soil in the drawer 52 so that the soil can enter the next stage of processing.

[0075] In some embodiments, Figure 3 and Fig. 9 As shown, each blocking member 6 has a convex shaft 62 extending outward in the left-right direction and slidably connected to the guide seat 5, and the sliding direction of the convex shaft 62 and the guide seat 5 is inclined from front to back and downward; specifically, the guide seat 5 has a guide hole that penetrates along the left-right direction and is inclined from front to back and downward, and this convex shaft 62 is inserted into this guide hole along the left-right direction.

[0076] In this embodiment, the linear drive assembly 7 includes a linear cylinder 71 and a sliding member 72 .

[0077] The linear cylinder 71 is fixedly mounted on the housing 1, and its power output axis is parallel to the front-rear direction.

[0078] The sliding member 72 is slidably arranged on the rear side of the box body 1 along the front-rear direction, and has a plurality of strip holes 721 arranged at intervals along the up-down direction and penetrating along the left-right direction, and each strip hole 721 extends along the up-down direction.

[0079] In this embodiment, the plurality of strip-shaped holes 721 correspond to the plurality of blocking members 6 one by one, and the corresponding protruding shafts 62 are inserted into the strip-shaped holes 721 .

[0080] By adopting the above technical solution, when the linear cylinder 71 is started, the sliding member 72 drives the plurality of convex shafts 62 to move in the front-rear direction, so that the convex shafts 62 move along the length direction of the strip-shaped hole 721 .

[0081] In some embodiments, Figure 4 As shown, the inner bottom surface of the box body 1 adopts an inclined surface; this inclined surface is inclined downward from front to back, and the inner bottom surface of the discharge port 11 is arranged coplanar with the inclined surface to ensure that the soil falling into the inner bottom surface of the box body 1 can roll toward the discharge port 11, thereby facilitating recovery.

[0082] In some embodiments, Figures 1 to 4 As shown, the backfill soil screening device also includes a storage box 8 for being arranged on the rear side of the box body 1, and the storage box 8 adopts a structure with a hollow interior and an opening facing upward; in this embodiment, the opening surface of the storage box 8 is located below the discharge port 11, so as to timely recover the material discharged from the discharge port 11.

[0083] The above content is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A backfill soil screening device, characterized in that: include: The box body is used to be fixed on a horizontal plane, and adopts a structure with a hollow interior and an opening facing upward; the box body has a discharge port, and the direction of the discharge port is defined as from front to rear; the box body also has a plurality of through openings located on the upper side of the discharge port, spaced apart in the up-down direction and all facing the rear side; A plurality of sieve plates are arranged in parallel in the vertical direction inside the box body, all of which are located on the upper side of the discharge port and correspond to the plurality of through ports one by one; each of the sieve plates is hinged to the box body in the left-right direction, and the upper side surface of each of the sieve plates is inclined downward from front to back and is coplanar with the inner bottom surface of the corresponding through port; and A vibration assembly is arranged on the box body and connected to the plurality of sieve plates to drive the plurality of sieve plates to vibrate in the up-down direction so that the soil on the upper side of the sieve plates moves toward the through opening; Each of the sieve plates has a plurality of sieve holes, and the inner diameter of the sieve holes corresponding to the sieve plate on the upper side is greater than the inner diameter of the sieve holes corresponding to the sieve plate on the lower side.

2. The backfill soil screening device according to claim 1, characterized in that: The vibration assembly comprises: A plurality of rotating rollers are arranged on the box body at intervals along the up-down direction, and their axial directions are parallel to the left-right direction, and they are all connected to the box body for rotation along the left-right direction; each of the rotating rollers has a driving part located inside the box body and eccentrically arranged therewith; and A rotating motor is fixedly arranged on the box body, its power output axis is parallel to the left and right direction, and it is drivingly connected to one of the rotating rollers; There is a transmission structure between the plurality of rotating rollers; when any one of the rotating rollers rotates, the transmission structure can drive the other rotating rollers to rotate synchronously; and when the rotating rollers rotate, the driving unit can drive the screen plate to swing upward.

3. The backfill soil screening device according to claim 2, characterized in that: The transmission structure comprises: a plurality of first gears corresponding to the plurality of rotating rollers one by one; the corresponding first gears are coaxially connected to the rotating rollers, and the first gears are located outside the box; a transmission gap is formed between two adjacent first gears in the up-down direction; and A plurality of second gears are arranged in a one-to-one correspondence in the plurality of transmission gaps and are arranged in parallel with the first gears; each of the second gears is rotationally connected to the housing, and adjacent first gears are meshed with the second gears.

4. The backfill soil screening device according to claim 2 or 3, characterized in that: A protective shell is detachably connected to the box body, and the protective shell cover is arranged on the outer side of the transmission structure.

5. The backfill soil screening device according to claim 1, characterized in that: The backfill soil screening device also includes: A plurality of guide seats are arranged at intervals on the outer side of the box body along the vertical direction, and correspond to the plurality of through openings one by one, and are all fixedly connected to the rear side of the box body; wherein the upper side of each guide seat adopts an inclined surface extending toward the rear side, and is coplanar with the inner bottom surface of the corresponding through opening; and each guide seat has a material guide port penetrating along the vertical direction; A plurality of blocking members are slidably disposed on the upper side surfaces of the plurality of guide seats in a one-to-one correspondence, and the sliding directions of the blocking members are parallel to the axial direction of the through opening; and A linear drive assembly is disposed on the box body and is connected to the plurality of blocking members to drive the plurality of blocking members to be inserted into or withdrawn from the plurality of through openings at the same time; Wherein, when the blocking member is inserted into the through opening, the blocking member can restrict soil from passing through the through opening and can also be connected with the upper side surface of the screen plate; when the blocking member is withdrawn from the through opening, the blocking member can move to avoid the material guide port.

6. The backfill soil screening device according to claim 5, characterized in that: The lower side of the blocking member has a gasket made of elastic material suitable for connecting with the upper side of the screen plate; When the vibration assembly drives the screen plate to swing, the corresponding gasket undergoes elastic deformation.

7. The backfill soil screening device according to claim 5, characterized in that: Each of the guide seats also includes: The drawer is connected to the lower side of the guide seat by sliding along the left-right direction. It adopts a structure with a hollow interior and an upward opening, and is suitable for moving to communicate with the material guide port to recover soil materials discharged from the material guide port.

8. The backfill soil screening device according to claim 5, characterized in that: Each of the blocking members has a convex shaft extending outward in the left-right direction and slidably connected to the guide seat, and the sliding direction of the convex shaft and the guide seat is inclined from front to back and downward; the linear drive assembly includes: A linear cylinder is fixedly mounted on the housing, and its power output axis is parallel to the front-rear direction; and A sliding member is slidably arranged on the rear side of the box body in the front-rear direction, and has a plurality of strip holes arranged at intervals in the up-down direction and all penetrating in the left-right direction, and each of the strip holes extends in the up-down direction; Among them, the multiple strip holes correspond one by one to the multiple blocking parts, and the corresponding convex shafts are inserted into the strip holes; when the linear cylinder is started, the sliding part drives the multiple convex shafts to move in the front and rear directions, so that the convex shafts move along the length direction of the strip holes.

9. The backfill soil screening device according to claim 1, characterized in that: The inner bottom surface of the box body is an inclined surface; the inclined surface is inclined downward from front to back, and the inner bottom surface of the discharge port is coplanar with the inclined surface.

10. The backfill soil screening device according to claim 9, characterized in that: The backfill soil screening device also includes: The material storage box is used to be arranged on the rear side of the box body. It adopts a structure with a hollow interior and an opening facing upward, and its opening surface is located below the discharge port.

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