Sand backfill system and sand backfill method thereof

Abstract

The present application belongs to the field of sand and gravel backfilling, and particularly relates to a sand and gravel backfilling system. The existing sand and gravel discharging pipeline is fixed, which leads to uneven sand and gravel backfilling of the pipeline. It is inconvenient to discharge sand and gravel with large volume and hard texture, and the device is prone to damage. The present application provides the following scheme. The sand and gravel backfilling system comprises a backfilling cylinder, a communication feeding hopper fixedly connected to the top of the backfilling cylinder, and a plug-in plate inserted into one side of the feeding hopper. The present application also provides a sand and gravel backfilling method for the sand and gravel backfilling system, which comprises the following steps: S1: installing and adjusting the supporting mechanism according to the diameter of the pipeline to be backfilled. During installation, the first plug-in rod is inserted into the sleeve, and the top wire is locked. In the present application, the movable pipe can be rotated, the raw materials entering the movable pipe can be uniformly dropped, the movable pipe can be vibrated to facilitate the dropping of the raw materials, and the filter box can be vibrated to facilitate the filtration of the raw materials.

Description

Technical Field

[0001] This invention relates to the field of sand and gravel backfilling technology, and in particular to a sand and gravel backfilling system and a sand and gravel backfilling method thereof. Background Technology

[0002] Backfilling with sand and gravel is the process of filling the over-excavated portion between the overburden layer and the natural surface of tunnels, culverts, and open-cut works with various materials. A search reveals a sand and gravel backfilling device for steel pipe column construction disclosed in publication number CN114749235A, which includes a shell with a ring-shaped mounting component fixedly installed inside. However, this device still has the following problems in use:

[0003] 1. The pipes responsible for discharging sand and gravel are fixed in place, resulting in uneven backfilling of sand and gravel into the pipes;

[0004] 2. It is inconvenient to discharge large and hard sand and gravel, which can easily damage the device.

[0005] To address the aforementioned problems, this invention proposes a sand and gravel backfilling system and a sand and gravel backfilling method thereof. Summary of the Invention

[0006] 3. The present invention provides a sand and gravel backfilling system, which solves the shortcomings of the prior art, such as the fixed pipes responsible for discharging sand and gravel, resulting in uneven backfilling of sand and gravel in the pipes; inconvenience in discharging large and hard sand and gravel, which can easily damage the device.

[0007] This invention provides the following technical solution:

[0008] A gravel backfilling system, comprising:

[0009] A backfill cylinder, the top of which is fixedly connected to a feed hopper, and a baffle plate is inserted into one side of the feed hopper;

[0010] Multiple support mechanisms, and the outer circumferential wall of the backfill cylinder provided by the multiple support mechanisms;

[0011] A backfilling mechanism is provided, which is disposed in a backfilling cylinder. The backfilling mechanism includes a temporary storage cylinder rotatably connected to the inner circumference of the backfilling cylinder. The inner circumference of the backfilling cylinder is provided with a limiting mechanism to support the temporary storage cylinder. The bottom of the temporary storage cylinder is provided with two discharge components. The discharge components include a discharge pipe, the bottom of which is fixedly connected to a flexible hose. The other end of the flexible hose is fixedly connected to a movable pipe. A telescopic rod is fixedly connected between the outer circumference of the temporary storage cylinder and the movable pipe. A spring is fixedly connected between the two ends of the telescopic rod. A shaking component is provided between the movable pipe and the backfilling cylinder to make the movable pipe vibrate. A driving component is provided between the backfilling cylinder and the temporary storage cylinder to make the temporary storage cylinder rotate.

[0012] A filtration mechanism is disposed inside the backfill cylinder and located above the temporary storage cylinder.

[0013] Furthermore, the drive assembly includes a motor, which is fixedly connected to the inner circumferential wall of the backfill cylinder. One end of the motor output shaft is fixedly connected to a first gear, and a gear ring is fixedly connected to the outer circumferential wall of the temporary storage cylinder. The first gear meshes with the gear ring.

[0014] Furthermore, the shaking assembly includes a pull rod and a mounting ring. The pull rod is rotatably connected to the outer circumference of the movable tube, and the mounting ring is fixedly connected to the inner circumference of the backfill cylinder. A plurality of first wedge blocks are fixedly connected to the top of the mounting ring, and the pull rod is a right-angle bend.

[0015] Furthermore, an extension tube is inserted into the inner circumference of the movable tube. Multiple first threaded holes are opened on one side of the circumference of the extension tube, and a second threaded hole is opened on one side of the circumference of the movable tube. A fixing bolt is threaded into the second threaded hole, and the other end of the fixing bolt is threaded into one of the first threaded holes.

[0016] Furthermore, the limiting mechanism includes a support ring, which is fixedly connected to the inner circumference of the backfill cylinder. Multiple support shafts are fixedly connected to the upper surface of the support ring, and ball bearings are rotatably connected to the top of each support shaft. The ball bearings are in contact with the temporary storage cylinder.

[0017] Furthermore, the filtration mechanism includes a filter box, which is rotatably connected to the inner circumference of the backfill cylinder. A first discharge port is provided on one side of the circumference of the filter box, and a second discharge port is provided on one side of the circumference of the backfill cylinder. A discharge hopper is fixedly connected inside the second discharge port, and the discharge hopper is located below the first discharge port.

[0018] Furthermore, a fixing plate is fixedly connected to the inner circumference of the backfill cylinder, and a through top shaft is slidably connected to the upper surface of the fixing plate. The top of the top shaft contacts the bottom of the filter box, and a second wedge block is fixedly connected to the bottom of the top shaft. Multiple top rods that cooperate with the second wedge block are fixedly connected to the inner circumference of the top of the temporary storage cylinder.

[0019] Furthermore, the support mechanism includes a sleeve, which is fixedly connected to the outer circumferential wall of the backfill cylinder. A first insert rod is inserted into the sleeve, and a second insert rod is inserted into the first insert rod. The upper surfaces of the sleeve and the first insert rod are both threaded with through-hole set screws.

[0020] Furthermore, a viewing window is provided on one side of the circumference of the backfill cylinder.

[0021] This invention also proposes a method for backfilling sand and gravel in a sand and gravel backfilling system, comprising the following steps:

[0022] S1: Install and adjust the support mechanism according to the diameter of the pipe to be backfilled. During installation, insert the first insert rod into the sleeve and lock it with the set screw. Then move the device to the pipe to be backfilled.

[0023] S2: Open the baffle plate and feed the raw material into the backfill cylinder through the feed hopper. Start the motor, and the motor drives the first gear to rotate. The first gear drives the gear ring to rotate, which in turn causes the temporary storage cylinder to rotate. The raw material enters the filter box through the feed hopper, and after being filtered by the filter box, it enters the temporary storage cylinder. Then it is discharged through the discharge pipe and the movable pipe. The rotation of the temporary storage cylinder causes the raw material to fall evenly into the pipeline.

[0024] S3: While the movable tube is rotating, it also drives the pull rod to rotate. The pull rod slides along the first wedge block. Then the pull rod disengages from the first wedge block, and the movable tube is reset under the push of the spring, which causes the movable tube to vibrate, facilitating the dropping of raw materials.

[0025] S4: While the temporary storage cylinder rotates, it also drives the top rod to rotate. The top rod contacts the second wedge block, which lifts the top shaft, causing the filter box to rotate. Then, the filter box resets under its own weight and the weight of the raw material, causing the filter box to vibrate, which facilitates the filtration of the raw material. Larger and harder raw materials are discharged into the discharge hopper through the first discharge port for easy collection.

[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0027] In this invention, the movable tube is designed to rotate, so that when the motor is started, the motor, through the cooperation of the first gear and the gear ring, can make the movable tube rotate, so that the raw materials entering the movable tube fall evenly.

[0028] In this invention, the movable tube is designed to vibrate, so that while the movable tube rotates, the pull rod slides along the first wedge block. Then the pull rod disengages from the first wedge block, and the movable tube resets under the push of the spring, thereby causing the movable tube to vibrate, which facilitates the dropping of raw materials.

[0029] In this invention, the filter box is designed to vibrate, causing the top rod to contact the second wedge block. The second wedge block lifts the top shaft, causing the filter box to rotate. Subsequently, the filter box returns to its original position under its own weight and the weight of the raw material, thus causing the filter box to vibrate and facilitating the filtration of the raw material.

[0030] In this invention, the support mechanism allows for adjustment, enabling the length between the first and second insert rods to be adjusted by loosening the set screws during installation, based on the diameter of the pipe, thus improving the flexibility of the device.

[0031] In this invention, the movable tube can be rotated to allow the raw materials entering the movable tube to fall evenly. At the same time, the movable tube can be vibrated to facilitate the falling of the raw materials. The filter box can also be vibrated to facilitate the filtration of the raw materials. Attached Figure Description

[0032] Figure 1 This is a first-view three-dimensional structural schematic diagram of a sand and gravel backfilling system provided in an embodiment of the present invention.

[0033] Figure 2 This is a second-view three-dimensional structural schematic diagram of a sand and gravel backfilling system provided in an embodiment of the present invention;

[0034] Figure 3 This is a cross-sectional structural diagram of a sand and gravel backfilling system provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the installation structure of a temporary storage cylinder for a sand and gravel backfilling system provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the filter box installation structure of a sand and gravel backfilling system provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the support structure of a sand and gravel backfilling system provided in an embodiment of the present invention.

[0038] Figure label:

[0039] 1. Backfill cylinder; 2. Support mechanism; 201. Sleeve; 202. First insert rod; 203. Second insert rod; 3. Discharge hopper; 4. Feed hopper; 5. ; 6. Insert plate; 7. Viewing window; 8. Temporary storage cylinder; 9. Discharge pipe; 10. Hose; 11. Movable pipe; 12. Telescopic rod; 13. Spring; 14. Filter box; 15. Extension pipe; 16. First threaded hole; 17. Fixing bolt; 18. Motor; 19. First gear; 20. Gear ring; 21. Tie rod; 22. Mounting ring; 23. First wedge block; 24. Fixing plate; 25. Top shaft; 26. Second wedge block; 27. Top rod; 28. Support ring; 29. ​​Support shaft; 30. Ball bearing. Detailed Implementation

[0040] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0042] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0043] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0044] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0045] Example 1

[0046] Reference Figures 1-6A sand and gravel backfilling system includes: a backfill cylinder 1, with a feed hopper 4 fixedly connected to the top of the backfill cylinder 1. A baffle plate 6 is inserted into one side of the feed hopper 4 to facilitate the entry of raw materials into the backfill cylinder 1. The feeding speed of the feed hopper 4 can be changed by adjusting the position of the baffle plate 6. A viewing window 7 is provided on one side of the circumference of the backfill cylinder 1 for easy observation of the feeding process. Multiple support mechanisms 2 are provided on the outer circumference of the backfill cylinder 1 to support it. A filling mechanism is located within the backfill cylinder 1 and includes a temporary storage cylinder 8 rotatably connected to the inner circumference of the backfill cylinder 1. The inner circumference of the backfill cylinder 1 is provided with a limiting mechanism to support the temporary storage cylinder 8. Two discharge components are provided at the bottom of the temporary storage cylinder 8. The temporary storage cylinder 8 is conical to facilitate the downward sliding of raw materials. The discharge components include a discharge... The bottom of the material pipe 9 and the discharge pipe 9 are fixedly connected to a flexible hose 10, and the other end of the flexible hose 10 is fixedly connected to a movable pipe 11. The flexible hose 10 facilitates the rotation of the movable pipe 11. A telescopic rod 12 is fixedly connected between the outer circumference of the temporary storage cylinder 8 and the movable pipe 11. A spring 13 is fixedly connected between the two ends of the telescopic rod 12. When the temporary storage cylinder 8 rotates, the raw material enters the filter box 14 through the feed hopper 4. After being filtered by the filter box 14, it enters the temporary storage cylinder 8 and is then discharged through the discharge pipe 9 and the movable pipe 11. The rotation of the temporary storage cylinder 8 causes the raw material to fall evenly into the pipe. A shaking component is provided between the movable pipe 11 and the backfill cylinder 1 to make the movable pipe 11 shake. A drive component is provided between the backfill cylinder 1 and the temporary storage cylinder 8 to make the temporary storage cylinder 8 rotate. The filtration mechanism is set inside the backfill cylinder 1 and above the temporary storage cylinder 8. It is used to filter out the larger and harder raw materials in the raw material.

[0047] Reference Figure 4 The drive assembly includes a motor 18, which is fixedly connected to the inner circumference of the backfill cylinder 1. A first gear 19 is fixedly connected to one end of the motor 18's output shaft. A gear ring 20 is fixedly connected to the outer circumference of the temporary storage cylinder 8. The first gear 19 meshes with the gear ring 20. Starting the motor 18 drives the first gear 19 to rotate, which in turn drives the gear ring 20 to rotate, thus causing the temporary storage cylinder 8 to rotate. The vibration assembly includes a pull rod 21 and a mounting ring 22. The pull rod 21 is rotatably connected to the outer circumference of the movable tube 11. Ring 22 is fixedly connected to the inner circumference of backfill cylinder 1. Multiple first wedge blocks 23 are fixedly connected to the top of ring 22. Pull rod 21 is bent at a right angle. One end of pull rod 21 is also rotatably connected to a roller to facilitate the movement of pull rod 21. When movable tube 11 rotates, it also drives pull rod 21 to rotate. Pull rod 21 slides along first wedge block 23. Then pull rod 21 disengages from contact with first wedge block 23. Movable tube 11 is reset under the push of spring 13, which causes movable tube 11 to vibrate, facilitating the falling of raw materials.

[0048] Example 2

[0049] Reference Figures 1-6 A sand and gravel backfilling system, comprising:

[0050] A backfill cylinder 1 has a feed hopper 4 fixedly connected to its top. A baffle plate 6 is inserted into one side of the feed hopper 4, facilitating the entry of raw materials into the backfill cylinder 1. The feeding speed of the feed hopper 4 can be changed by adjusting the position of the baffle plate 6. A viewing window 7 is provided on one side of the circumference of the backfill cylinder 1 for easy observation of the feeding process. Multiple support mechanisms 2 are installed on the outer circumference of the backfill cylinder 1 to support it. A filling mechanism is installed within the backfill cylinder 1 and includes a temporary storage cylinder 8 rotatably connected to the inner circumference of the backfill cylinder 1. A limiting mechanism supporting the temporary storage cylinder 8 is provided on the inner circumference of the backfill cylinder 1. Two discharge components are provided at the bottom of the temporary storage cylinder 8. The temporary storage cylinder 8 is conical to facilitate the downward sliding of raw materials. The discharge components include a discharge pipe 9 for discharging materials. A flexible hose 10 is fixedly connected to the bottom of pipe 9, and a movable pipe 11 is fixedly connected to the other end of the flexible hose 10. The flexible hose 10 facilitates the rotation of the movable pipe 11. A telescopic rod 12 is fixedly connected between the outer circumference of the temporary storage cylinder 8 and the movable pipe 11. A spring 13 is fixedly connected between the two ends of the telescopic rod 12. When the temporary storage cylinder 8 rotates, the raw material enters the filter box 14 through the feed hopper 4. After being filtered by the filter box 14, it enters the temporary storage cylinder 8 and is then discharged through the discharge pipe 9 and the movable pipe 11. The rotation of the temporary storage cylinder 8 causes the raw material to fall evenly into the pipeline. A shaking component is provided between the movable pipe 11 and the backfill cylinder 1 to make the movable pipe 11 shake. A drive component is provided between the backfill cylinder 1 and the temporary storage cylinder 8 to make the temporary storage cylinder 8 rotate. The filtration mechanism is set inside the backfill cylinder 1 and above the temporary storage cylinder 8, and is used to filter out the larger and harder raw materials.

[0051] Reference Figure 4The drive assembly includes a motor 18, which is fixedly connected to the inner circumference of the backfill cylinder 1. A first gear 19 is fixedly connected to one end of the motor 18's output shaft. A gear ring 20 is fixedly connected to the outer circumference of the temporary storage cylinder 8. The first gear 19 meshes with the gear ring 20. Starting the motor 18 drives the first gear 19 to rotate, which in turn drives the gear ring 20 to rotate, thus causing the temporary storage cylinder 8 to rotate. The vibration assembly includes a pull rod 21 and a mounting ring 22. The pull rod 21 is rotatably connected to the outer circumference of the movable tube 11. Ring 22 is fixedly connected to the inner circumference of backfill cylinder 1. Multiple first wedge blocks 23 are fixedly connected to the top of ring 22. Pull rod 21 is bent at a right angle. One end of pull rod 21 is also rotatably connected to a roller to facilitate the movement of pull rod 21. When movable tube 11 rotates, it also drives pull rod 21 to rotate. Pull rod 21 slides along first wedge block 23. Then pull rod 21 disengages from contact with first wedge block 23. Movable tube 11 is reset under the push of spring 13, which causes movable tube 11 to vibrate, facilitating the falling of raw materials.

[0052] Reference Figure 4 Extension tubes 15 are inserted into the inner circumference of the movable tube 11. Multiple through holes are opened at the bottom of both the extension tube 15 and the movable tube 11, allowing the material to fall during the movement. Multiple first threaded holes 16 are opened on one side of the circumference of the extension tube 15, and a second threaded hole is opened on one side of the circumference of the movable tube 11. A fixing bolt 17 is threaded into the second threaded hole. The other end of the fixing bolt 17 is threaded into one of the first threaded holes 16. When the diameter of the pipe is large, the fixing bolt 17 is loosened, and then the extension tube 15 is moved, thereby changing the overall length. This method is suitable for pipes of different diameters.

[0053] Reference Figure 6 The limiting mechanism includes a support ring 28, which is fixedly connected to the inner circumference of the backfill cylinder 1. Multiple support shafts 29 are fixedly connected to the upper surface of the support ring 28. Each support shaft 29 has a ball bearing 30 rotatably connected to its top. The ball bearing 30 is in contact with the temporary storage cylinder 8. When the temporary storage cylinder 8 rotates, it is supported by the support shafts 29 and the ball bearing 30. The rotation of the ball bearing 30 facilitates the rotation of the temporary storage cylinder 8.

[0054] Reference Figure 5The filtration mechanism includes a filter box 14, which is rotatably connected to the inner circumference of the backfill cylinder 1. The filter box 14 is inclined, and the center point of rotation of the filter box 14 is biased towards the side closer to the discharge hopper 3. A first discharge port is opened on one side of the circumference of the filter box 14, and a second discharge port is opened on one side of the circumference of the backfill cylinder 1. The discharge hopper 3 is fixedly connected inside the second discharge port and is located below the first discharge port. The filter box 14 can filter out materials with larger volume and harder texture. A fixing plate 24 is fixedly connected to the inner circumference of the backfill cylinder 1, and a through-hole is slidably connected to the upper surface of the fixing plate 24. The top shaft 25 contacts the bottom of the top filter box 14. A second wedge block 26 is fixedly connected to the bottom of the top shaft 25. Multiple push rods 27 that cooperate with the second wedge block 26 are fixedly connected to the inner circumference of the top of the temporary storage cylinder 8. The push rods 27 contact the second wedge block 26 and lift the top shaft 25 through the second wedge block 26, thereby causing the filter box 14 to rotate. Then, the filter box 14 returns to its original position under its own weight and the weight of the raw material, causing the filter box 14 to vibrate, which facilitates the filtration of the raw material. Larger and harder raw materials are discharged into the discharge hopper 3 through the first discharge port for easy collection.

[0055] Reference Figure 1 The support mechanism 2 includes a sleeve 201, which is fixedly connected to the outer circumference of the backfill cylinder 1. A first insert rod 202 is inserted into the sleeve 201, and a second insert rod 203 is inserted into the first insert rod 202. The upper surfaces of the sleeve 201 and the first insert rod 202 are threaded with through-hole set screws. Loosening the set screws can adjust the length between the first insert rod 202 and the second insert rod 203, thereby improving the flexibility of the device.

[0056] However, as is well known to those skilled in the art, the working principle and wiring method of motor 18 are commonplace and are all conventional methods or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0057] This invention also proposes a method for backfilling sand and gravel in a sand and gravel backfilling system, comprising the following steps:

[0058] S1: Install and adjust the support mechanism 2 according to the diameter of the pipe to be backfilled. During installation, insert the first insert rod 202 into the sleeve 201 and lock it with the set screw. Then move the device to the pipe to be backfilled.

[0059] S2: Open the baffle plate 6 and feed the raw material into the backfill cylinder 1 through the feed hopper 4. Start the motor 18. The motor 18 drives the first gear 19 to rotate, and the first gear 19 drives the gear ring 20 to rotate, which in turn causes the temporary storage cylinder 8 to rotate. The raw material enters the filter box 14 through the feed hopper 4, and after being filtered by the filter box 14, it enters the temporary storage cylinder 8. Then it is discharged through the discharge pipe 9 and the movable pipe 11. The rotation of the temporary storage cylinder 8 causes the raw material to fall evenly into the pipeline.

[0060] S3: While the movable tube 11 is rotating, it also drives the pull rod 21 to rotate. The pull rod 21 slides along the first wedge block 23. Then the pull rod 21 disengages from the first wedge block 23, and the movable tube 11 is reset under the push of the spring 13, which causes the movable tube 11 to vibrate, making it easier for the raw materials to fall.

[0061] S4: While the temporary storage cylinder 8 rotates, it also drives the top rod 27 to rotate. The top rod 27 contacts the second wedge block 26, and the second wedge block 26 lifts the top shaft 25, thereby causing the filter box 14 to rotate. Then, the filter box 14 resets under its own weight and the weight of the raw material, causing the filter box 14 to vibrate, which facilitates the filtration of the raw material. Larger and harder raw materials are discharged into the discharge hopper 3 through the first discharge port for easy collection.

[0062] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sand and gravel backfilling system, comprising: A backfill cylinder, the top of which is fixedly connected to a feed hopper, and a baffle plate is inserted into one side of the feed hopper; Multiple support mechanisms, and the outer circumferential wall of the backfill cylinder provided by the multiple support mechanisms; A backfilling mechanism, wherein the backfilling mechanism is disposed in a backfilling cylinder, the backfilling mechanism includes a temporary storage cylinder rotatably connected to the inner circumference of the backfilling cylinder, the inner circumference of the backfilling cylinder is provided with a limiting mechanism for supporting the temporary storage cylinder, the bottom of the temporary storage cylinder is provided with two discharge assemblies, each discharge assembly includes a discharge pipe, the bottom of the discharge pipe is fixedly connected to a flexible hose, the other end of the flexible hose is fixedly connected to a movable pipe, a telescopic rod is fixedly connected between the outer circumference of the temporary storage cylinder and the movable pipe, a spring is fixedly connected between the two ends of the telescopic rod, a shaking assembly is provided between the movable pipe and the backfilling cylinder to make the movable pipe vibrate, and a driving assembly is provided between the backfilling cylinder and the temporary storage cylinder to make the temporary storage cylinder rotate, characterized in that it further includes: A filtration mechanism is disposed inside the backfill cylinder and above the temporary storage cylinder. The shaking component includes a pull rod and a mounting ring. The pull rod is rotatably connected to the outer circumference of the movable tube, and the mounting ring is fixedly connected to the inner circumference of the backfill cylinder. Multiple first wedge blocks are fixedly connected to the top of the mounting ring. The pull rod is bent at a right angle. The filtration mechanism includes a filter box, which is rotatably connected to the inner circumference of the backfill cylinder. A first discharge port is opened on one side of the circumference of the filter box, and a second discharge port is opened on one side of the circumference of the backfill cylinder. A discharge hopper is fixedly connected inside the second discharge port and is located below the first discharge port. A fixing plate is fixedly connected to the inner circumference of the backfill cylinder. A through-hole top shaft is slidably connected to the upper surface of the fixing plate. The top of the top shaft contacts the bottom of the filter box. A second wedge block is fixedly connected to the bottom of the top shaft. Multiple top rods that cooperate with the second wedge blocks are fixedly connected to the inner circumference of the top of the temporary storage cylinder.

2. The sand and gravel backfilling system according to claim 1, characterized in that, The drive assembly includes a motor, which is fixedly connected to the inner circumference of the backfill cylinder. A first gear is fixedly connected to one end of the motor output shaft, and a gear ring is fixedly connected to the outer circumference of the temporary storage cylinder. The first gear meshes with the gear ring.

3. A sand and gravel backfilling system according to claim 2, characterized in that, The inner circumference of the movable tube is fitted with an extension tube. One side of the circumference of the extension tube has multiple first threaded holes, and one side of the circumference of the movable tube has a second threaded hole. A fixing bolt is threaded into the second threaded hole, and the other end of the fixing bolt is threaded into one of the first threaded holes.

4. The sand and gravel backfilling system according to claim 3, characterized in that, The limiting mechanism includes a support ring, which is fixedly connected to the inner circumference of the backfill cylinder. Multiple support shafts are fixedly connected to the upper surface of the support ring, and ball bearings are rotatably connected to the top of each support shaft. The ball bearings are in contact with the temporary storage cylinder.

5. A sand and gravel backfilling system according to claim 4, characterized in that, The support mechanism includes a sleeve (201), which is fixedly connected to the outer circumferential wall of the backfill cylinder. A first insert rod (202) is inserted into the sleeve (201), and a second insert rod (203) is inserted into the first insert rod (202). The upper surfaces of the sleeve (201) and the first insert rod (202) are both threaded with through-hole set screws.

6. A sand and gravel backfilling system according to claim 5, characterized in that, A viewing window is provided on one side of the circumference of the backfill cylinder.

7. A method for backfilling sand and gravel in a sand and gravel backfilling system according to claim 6, characterized in that, Includes the following steps: S1: Install and adjust the support mechanism according to the diameter of the pipe to be backfilled. During installation, insert the first insert rod (202) into the sleeve (201) and lock it with the set screw. Then move the device to the pipe to be backfilled. S2: Open the baffle plate and feed the raw material into the backfill cylinder through the feed hopper. Start the motor, and the motor drives the first gear to rotate. The first gear drives the gear ring to rotate, which in turn causes the temporary storage cylinder to rotate. The raw material enters the filter box through the feed hopper, and after being filtered by the filter box, it enters the temporary storage cylinder. Then it is discharged through the discharge pipe and the movable pipe. The rotation of the temporary storage cylinder causes the raw material to fall evenly into the pipeline. S3: While the movable tube is rotating, it also drives the pull rod to rotate. The pull rod slides along the first wedge block. Then the pull rod disengages from the first wedge block, and the movable tube is reset under the push of the spring, which causes the movable tube to vibrate, facilitating the dropping of raw materials. S4: While the temporary storage cylinder rotates, it also drives the top rod to rotate. The top rod contacts the second wedge block, which lifts the top shaft, causing the filter box to rotate. Then, the filter box resets under its own weight and the weight of the raw material, causing the filter box to vibrate, which facilitates the filtration of the raw material. Larger and harder raw materials are discharged into the discharge hopper through the first discharge port for easy collection.

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