Earthwork backfilling device and method for trench construction

Abstract

The application provides a soil backfilling device and method for trench construction, and relates to the technical field of building construction equipment. The soil backfilling device for trench construction comprises a frame body, a material stirring mechanism, a material screening mechanism, a material receiving mechanism and a supporting mechanism. Rollers are arranged at the four corners of the bottom of the frame body, and guide rods are arranged on the two sides of the frame body for abutting with the side walls of the trench. The material stirring mechanism comprises a material stirring assembly and a lifting assembly for driving the material stirring assembly to lift along the vertical direction. The material screening mechanism comprises a screening hopper rotatably arranged at one end of the frame body and a turnover piece for driving the screening hopper to overturn. The material receiving mechanism comprises a material receiving disc rotatably arranged on the frame body, and one end of the material receiving disc close to the screening hopper is provided with a connecting piece for being connected with a first rotating shaft. The application can screen and collect large particle stone blocks and hard soil blocks in the process of early-stage pipe filling, and uniformly add the collected large particle stone blocks and hard soil blocks to the trench in the later stage.

Description

Technical Field

[0001] This invention relates to the field of construction equipment technology, and more specifically, to a backfilling device and method for trench construction. Background Technology

[0002] Backfilling during pipeline trench construction is a crucial step in ensuring the safe and stable operation of pipelines and the restoration of the ground structure, and must be strictly carried out in accordance with the specifications. During backfilling, the initial backfill height should be 500mm above the top of the pipe for the first compaction. Subsequent backfills at designated heights are then compacted again, with multiple compaction cycles to ensure the strength of the trench after backfilling. The original soil excavated during the trench excavation should be used preferentially, but it is essential to ensure that the original soil does not contain large stones or hard clods from the initial pipeline burial process to avoid damage to the pipeline during the first compaction.

[0003] Currently, when using original soil for backfilling, it is necessary to first screen out large stones and hard soil clods from the soil, and then use the screened soil for the initial burial of pipelines. Later, the large stones and hard soil clods are mixed into the remaining soil for the final backfilling. The screening and mixing processes require a lot of time from the staff, resulting in reduced backfilling efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a backfilling device for trench construction, which can screen and collect large stones and hard soil clods during the initial pipeline burial process, and then uniformly add the collected large stones and hard soil clods to the trench during the subsequent burial process, thereby improving backfilling efficiency and reducing manual labor intensity.

[0005] This invention is achieved through the following technical solution: a backfilling device for trench construction, comprising:

[0006] The frame is equipped with rollers at all four corners of its bottom and guide rods on both sides for fitting against the sidewall of the trench.

[0007] A feeding mechanism, comprising a feeding component and a lifting component for driving the feeding component to move up and down in a vertical direction;

[0008] A screening mechanism, comprising a screening hopper and a tilting component, wherein the screening hopper is rotatably mounted at one end of the frame and extends out of the frame via a first rotating shaft, and the tilting component is mounted on the top of the frame and can drive the screening hopper to tilt.

[0009] A receiving mechanism, comprising a receiving tray, wherein the end of the receiving tray away from the sieve hopper is rotatably mounted on the frame via a second rotating shaft, and the end of the receiving tray near the sieve hopper is provided with a connecting member for connecting to a first rotating shaft;

[0010] A support mechanism, the support mechanism including a support base, the support base being fixed to the bottom of the frame by a connecting rod;

[0011] When the receiving tray is connected to the first rotating shaft via a connector, the end of the receiving tray near the screen hopper is higher than the end of the receiving tray away from the screen hopper; when the connector is separated from the first rotating shaft, the receiving tray overlaps the support base and the end of the receiving tray near the screen hopper is lower than the end of the receiving tray away from the screen hopper.

[0012] Furthermore, the tilting component includes a dual-axis motor, with lifting discs mounted on both output shafts of the dual-axis motor. Lifting ropes are wound around the lifting discs, and the end of the lifting ropes away from the lifting discs is fixedly connected to the screen hopper. The frame is equipped with guide wheels for the lifting ropes to be placed on.

[0013] Furthermore, the frame is also equipped with a lifting component for driving the tilting component to periodically lift the screen hopper.

[0014] Furthermore, the lifting component includes a drive motor, a drive shaft, and a cam. The drive shaft is rotatably connected to the top of the frame, and the drive motor is fixedly mounted on one side of the frame and can drive the drive shaft to rotate. The cam is coaxially connected to the drive shaft, and a rope groove is provided on the outer contour surface of the cam, and the lifting rope is laid in the rope groove.

[0015] Furthermore, the support is provided with a telescopic sealing member, and the receiving tray is provided with a through groove. When the receiving tray is placed on the support, the telescopic sealing member is inserted into the through groove and seals the opening of the receiving tray. The end of the screening hopper facing the receiving tray is provided with an arc-shaped pressing rod. After the flipping member drives the screening hopper to flip, the arc-shaped pressing rod can press the telescopic sealing member downward to open the opening of the receiving tray.

[0016] Furthermore, the telescopic sealing member includes a sealing plate, which is slidably disposed within the support seat. The bottom end of the sealing plate extends to the lower part of the support seat and is provided with a mounting plate. An elastic rope connects the mounting plate and the support seat.

[0017] Furthermore, the lifting assembly includes a lifting motor, a lead screw, and a drive block. Two support seats are provided on one side of the frame. The lead screw is rotatably disposed between the two support seats. The lifting motor is fixedly disposed on the top of the frame and can drive the lead screw to rotate. The drive block is slidably connected to one side of the frame in the vertical direction and threadedly connected to the lead screw. The material feeding assembly is fixedly disposed on the drive block.

[0018] Furthermore, the material feeding assembly includes a mounting base, a material feeding plate, and a gear assembly. The mounting base is located on the side of the drive block away from the frame. The material feeding plate is rotatably connected to the bottom of the mounting base via a third rotating shaft. The gear assembly includes a rotating motor, a driving gear, and a driven gear. The driven gear is coaxially connected to the third rotating shaft. The driving gear is rotatably connected to the mounting base and meshes with the driven gear. The rotating motor is fixedly mounted on the mounting base and can drive the driving gear to rotate.

[0019] Furthermore, the feeding plate includes a fixed part and a telescopic part. The bottom of the fixed part is provided with a sliding groove, and the telescopic part is slidably connected in the sliding groove. The fixed part is provided with a positioning bolt, and the telescopic part is provided with a plurality of threaded holes for the positioning bolt to be inserted.

[0020] The present invention also provides a backfilling method using the above-mentioned earthwork backfilling device for trench construction, comprising the following steps:

[0021] S1. Push the frame to the top of the trench and make the guide rods on both sides fit against the two side walls of the trench respectively. Adjust the feeding range of the feeding mechanism so that the feeding mechanism can move the soil near the trench. Adjust the screen hopper to a state of 5°-15° tilt with the horizontal direction through the flipping part. Connect the receiving plate to the first rotating shaft through the connecting part.

[0022] S2. Push the frame along the length of the trench. Every time it is pushed forward, the corresponding soil is moved into the trench by the material feeding mechanism. Before the soil enters the trench, the screening hopper intercepts large stones or hard soil clods and guides them into the receiving tray. After the soil completely buries the pipeline and reaches the specified height above the pipeline, the compactor is used to compact it.

[0023] S3. After compaction, push the frame to the initial position, adjust the material feeding range of the feeding mechanism so that the feeding mechanism can move the remaining soil away from the trench. Adjust the screen hopper to a near vertical state through the flipping part so that the screen hopper no longer intercepts large stones or hard soil blocks. Push the frame again along the length of the trench to push all the remaining soil into the trench.

[0024] S4. During the process of pushing the earthwork into the trench, the receiving tray is removed from the first rotating shaft and supported by the supporting mechanism. At this time, the receiving tray is in an inclined state and the end of the receiving tray closest to the screen hopper is the lowest end. Large stones or hard soil blocks introduced from the screen hopper into the receiving tray can enter the trench together with the earthwork.

[0025] S5. At each specified backfill depth, the soil entering the trench is compacted using a rammer.

[0026] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0027] 1. This invention uses a screening mechanism to screen large stones and hard soil clods during the initial pipeline backfilling process. The screened large stones and hard soil clods are collected by a receiving mechanism. During the subsequent backfilling process, the screening mechanism is adjusted to a receiving state. The collected large stones and hard soil clods are then evenly added to the trench along with the soil during the backfilling process, which improves backfilling efficiency and reduces manual labor intensity.

[0028] 2. When intercepting large stones or hard soil clods in the earthwork, the present invention drives the cam to rotate via a drive motor, changing the contact position between the outer contour surface of the cam and the lifting rope. This applies a periodic thrust to the lifting rope. Since the position of the lifting rope wound around one end of the lifting plate does not change, the end of the lifting rope connected to the screen hopper will cause the screen hopper to periodically flip upward, thus facilitating the dumping of the intercepted impurities into the receiving tray. When the intercepted large stones and hard soil clods are introduced into the trench, the drive motor continues to apply a periodic force to the lifting rope as the cam rotates. The arc-shaped pressure rod can periodically press the telescopic sealing piece downward, causing the opening of the receiving tray to open periodically, allowing the large stones and hard soil clods to enter the trench more evenly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram illustrating the usage state of the present invention when earthwork near the trench is filled into the trench.

[0030] Figure 2 This is a schematic diagram of the usage state of the present invention when filling soil far away from the trench into the trench;

[0031] Figure 3 This is a schematic diagram of the overall structure of the sieve hopper of the present invention when it is tilted 5°-15° to the horizontal direction;

[0032] Figure 4 This is a schematic diagram of the material feeding mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the material feeding assembly of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the screening hopper, receiving mechanism and supporting mechanism of the present invention when the screening hopper is inclined at 5°-15° to the horizontal direction;

[0035] Figure 7 This is a schematic diagram of the structure of the receiving mechanism and the supporting mechanism of the present invention when they are in a separated state;

[0036] Figure 8 This is a schematic diagram of the support mechanism of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the screening hopper, receiving mechanism, and supporting mechanism when the screening hopper of the present invention is rotated to a near-vertical state;

[0038] Reference numerals: 1-Frame, 11-Roller, 12-Guide rod, 13-Mounting rod, 2-Material feeding mechanism, 21-Material feeding assembly, 211-Mounting base, 212-Material feeding plate, 2121-Third rotating shaft, 2122-Fixing part, 2123-Telescopic part, 2124-Positioning bolt, 213-Gear assembly, 2131-Rotating motor, 2132-Driving gear, 2133-Driven gear, 22-Lifting assembly, 221-Lifting motor, 222-Screw, 223-Drive block, 224-Support base, 3-Screwing mechanism, 31-Screwing hopper, 311- First rotating shaft, 312-arc-shaped pressure rod, 32-flipping component, 321-dual-axis motor, 322-lifting plate, 323-lifting rope, 324-guide wheel, 4-receiving mechanism, 41-receiving plate, 411-second rotating shaft, 412-through groove, 42-connector, 421-connecting seat, 422-locking bolt, 5-supporting mechanism, 51-supporting seat, 52-connecting rod, 53-telescopic sealing component, 531-sealing plate, 532-mounting plate, 533-elastic rope, 6-lifting component, 61-drive motor, 62-drive shaft, 63-cam, 631-rope groove. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] Example

[0042] The following is for reference Figures 1-9 To further illustrate with specific embodiments, this embodiment provides an earthwork backfilling device for trench construction, referring to... Figure 1 , Figure 2 , Figure 3As shown, the system includes a frame 1, a material feeding mechanism 2, a material screening mechanism 3, a material receiving mechanism 4, and a support mechanism 5. Rollers 11 are provided at the four corners of the bottom of the frame 1. Guide rods 12 for fitting against the sidewall of the trench are provided on both sides of the frame 1. When the frame 1 is pushed along the length of the trench, the frame 1 will not deviate due to the limiting effect of the guide rods 12 on both sides and the sidewall of the trench. The material feeding mechanism 2 includes a material feeding component 21 and a lifting component 22 for driving the material feeding component 21 to move up and down in the vertical direction. First, the material feeding component 21 is moved to the height of the highest point of the soil. After the material feeding component 21 moves the soil each time, the lifting component 22 drives the material feeding component 21 to descend to a specified height, that is, it can move the soil at the next height.

[0043] Reference Figure 4 As shown, the lifting assembly 22 includes a lifting motor 221, a lead screw 222, and a drive block 223. Two support seats 224 are provided on one side of the frame 1. The lead screw 222 is rotatably mounted between the two support seats 224, with its top end extending to the top of the frame 1. The lifting motor 221 is fixedly mounted on the top of the frame 1, and its output shaft is rotatably connected to the lead screw 222. The drive block 223 is slidably connected to one side of the frame 1 in the vertical direction and threadedly connected to the lead screw 222. The material-moving assembly 21 is fixedly mounted on the drive block 223. By driving the lead screw 222 to rotate through the lifting motor 221, the drive block 223 can slide along the height direction of the frame 1, thereby driving the entire material-moving assembly 21 to move vertically, facilitating the movement of soil at different heights.

[0044] Reference Figure 4 , Figure 5 As shown, the material-moving assembly 21 includes a mounting base 211, a material-moving plate 212, and a gear assembly 213. The mounting base 211 is located on the side of the drive block 223 away from the frame 1. The material-moving plate 212 is rotatably connected to the bottom of the mounting base 211 via a third rotating shaft 2121. The gear assembly 213 includes a rotating motor 2131, a driving gear 2132, and a driven gear 2133. The driven gear 2133 is coaxially connected to the third rotating shaft 2121. The driving gear 2132 is rotatably connected to the mounting base 211 and meshes with the driven gear 2133. The rotating motor 2131 is fixedly mounted on the mounting base 211 and can drive the driving gear 2132 to rotate. By rotating the driving gear 2132 driven by the rotating motor 2131, the driven gear 2133 rotates under the meshing action of the driving gear 2132, causing the material-moving plate 212 to swing, thereby realizing the earth-moving action.

[0045] Reference Figure 5As shown, the material-dispensing plate 212 includes a fixed part 2122 and a telescopic part 2123. The bottom of the fixed part 2122 has a groove, and the telescopic part 2123 is slidably connected within the groove. The fixed part 2122 is provided with positioning bolts 2124, and the telescopic part 2123 has multiple threaded holes for inserting the positioning bolts 2124. The bottom of the telescopic part 2123 has a bent portion to improve the dispensing effect on the earth. By changing the position of the telescopic part 2123 on the fixed part 2122 and then inserting the positioning bolts 2124 into the corresponding threaded holes, the dispensing range can be adjusted. When it is necessary to move soil near the trench into the trench, the telescopic part 2123 is inserted into the fixed part 2122 and the material moving plate 212 is at its minimum length; when it is necessary to move soil far from the trench into the trench, the telescopic part 2123 is pulled outward from the fixed part 2122 and the material moving plate 212 is at its maximum length.

[0046] Reference Figure 6 , Figure 7 As shown, the screening mechanism 3 includes a screening hopper 31 and a tilting member 32. The screening hopper 31 is rotatably mounted on one end of the frame 1 via a first rotating shaft 311 and extends outside the frame 1. The tilting member 32 is located on the top of the frame 1 and can drive the screening hopper 31 to tilt. The receiving mechanism 4 includes a receiving tray 41. Mounting rods 13 are welded to both sides of the frame 1 away from the screening hopper 31. A second rotating shaft 411 is provided at the end of the receiving tray 41 away from the screening hopper 31. The second rotating shaft 411 is rotatably connected between the two mounting rods 13. A connecting member 42 for connecting with the first rotating shaft 311 is provided at the end of the receiving tray 41 near the screening hopper 31. The supporting mechanism 5 includes a supporting seat 51. The supporting seat 51 is fixed to the bottom of the frame 1 via a connecting rod 52.

[0047] Before the excavated soil completely covers the pipeline and rises above the designated height, it is necessary to ensure that the soil entering the trench does not contain large stones or hard clods to avoid damage to the pipeline. Therefore, the initial state of the screening hopper 31 is such that it has an angle of 5°-15° with the horizontal plane. When the material feeding mechanism 2 moves the excavated soil into the trench, the screening hopper 31 intercepts large stones or hard clods in the soil, while the remaining soil can pass through the screening hopper 31 and enter the trench. Since the screening hopper 31 is inclined towards the receiving tray 41, it can guide large stones or hard clods into the receiving tray 41 for collection. When the filling height of the excavated soil is higher than the designated height of the pipeline, it is no longer necessary to intercept large stones or hard clods. At this time, the screen hopper 31 is rotated to a near-vertical state by the tilting device 32, and the soil enters the trench directly without screening.

[0048] Reference Figure 6 , Figure 9As shown, when the receiving tray 41 is connected to the first rotating shaft 311 via the connector 42, the end of the receiving tray 41 near the screen hopper 31 is higher than the end of the receiving tray 41 away from the screen hopper 31, allowing it to collect large stones and hard soil clods falling from the screen hopper 31. When the connector 42 is separated from the first rotating shaft 311, the receiving tray 41 overlaps the support 51, with the end of the receiving tray 41 near the screen hopper 31 lower than the end of the receiving tray 41 away from the screen hopper 31, allowing the collected large stones and hard soil clods to be poured into the trench. When the connector 42 on the receiving tray 41 is removed from the first rotating shaft 311, the receiving tray 41 rotates downwards under its own weight until it contacts the support 51 and remains stable under the support of the support 51. At this time, the receiving tray 41 is in a downward tilted state and pours the large stones and hard soil clods into the trench.

[0049] Reference Figure 6 As shown, the flipping component 32 includes a dual-axis motor 321. Both output shafts of the dual-axis motor 321 are equipped with lifting discs 322. Lifting ropes 323 are wound around the lifting discs 322. The end of the lifting ropes 323 away from the lifting discs 322 is fixedly connected to the screen hopper 31. The frame 1 is equipped with guide wheels 324 for the lifting ropes 323 to be placed on. The dual-shaft motor 321 drives two lifting discs 322 to rotate simultaneously and wind the lifting rope 323. The end of the lifting rope 323 can apply tension to the screen hopper 31, causing the screen hopper 31 to flip upwards to a near-vertical state, thus no longer trapping large stones or hard soil clods in the earthwork. By reversing the dual-shaft motor 321 to drive the lifting discs 322 to rotate in the opposite direction, the lifting rope 323 can be unwound. Under its own gravity, the screen hopper 31 can flip downwards until it has an angle of 5°-15° with the horizontal plane, at which point the dual-shaft motor 321 stops rotating, thus maintaining the position of the screen hopper 31.

[0050] Reference Figure 3 , Figure 6 As shown, the frame 1 is also equipped with a lifting member 6 for driving the tilting member 32 to periodically lift the screen hopper 31. The lifting member 6 includes a drive motor 61, a drive shaft 62, and a cam 63. The drive shaft 62 is rotatably connected to the top of the frame 1, and the drive motor 61 is fixedly installed on one side of the frame 1 and can drive the drive shaft 62 to rotate. The cam 63 is coaxially connected to the drive shaft 62, and a rope groove 631 is opened on the outer contour surface of the cam 63. The lifting rope 323 is laid in the rope groove 631. By driving the cam 63 to rotate through the drive motor 61, the contact position between the outer contour surface of the cam 63 and the lifting rope 323 changes, that is, a periodic thrust can be applied to the lifting rope 323. Since the position of the lifting rope 323 wound around one end of the lifting plate 322 does not change, the end of the lifting rope 323 connected to the screen hopper 31 will drive the screen hopper 31 to periodically tilt upward, thereby facilitating the dumping of the intercepted impurities to the receiving plate 41.

[0051] Reference Figure 7 As shown, the connector 42 includes a connecting seat 421 and a locking bolt 422. The connecting seat 421 has a U-shaped groove that can be engaged with the first rotating shaft 311, and the locking bolt 422 is installed at the top of the U-shaped groove. When it is necessary to install the receiving hopper to the first rotating shaft 311, the U-shaped groove on the connecting seat 421 is engaged with the first rotating shaft 311, and the locking bolt 422 is tightened to fix the position of the receiving hopper and the first rotating shaft 311. This ensures that all the large stones and hard soil blocks intercepted in the screening hopper 31 can enter the receiving tray 41, while ensuring that the height of the end of the receiving tray 41 near the screening hopper 31 is higher than the height of the end of the receiving tray 41 away from the screening hopper 31, thus preventing the collected large stones and hard soil blocks from being poured out.

[0052] Reference Figure 7 As shown, a telescopic sealing member 53 is provided on the support base 51, and a through groove 412 is provided on the receiving tray 41. When the receiving tray 41 is placed on the support base 51, the telescopic sealing member 53 is inserted into the through groove 412 and seals the opening of the receiving tray 41; see reference. Figure 6 , Figure 9 As shown, an arc-shaped pressure bar 312 is provided at one end of the screening hopper 31 facing the receiving plate 41. After the flipping member 32 drives the screening hopper 31 to flip, the lifting member 6 continues to drive the lifting rope 323. During this process, the arc-shaped pressure bar 312 can periodically press the telescopic sealing member 53 downward, so that the opening of the receiving plate 41 opens periodically, thereby allowing large stones and hard soil blocks to enter the trench more evenly.

[0053] Reference Figure 7 , Figure 8 As shown, the telescopic sealing member 53 includes a sealing plate 531, which is slidably disposed within the support 51. The bottom end of the sealing plate 531 extends to the lower part of the support 51 and is equipped with a mounting plate 532. Multiple elastic ropes 533 are connected between the mounting plate 532 and the support 51. When no external force is applied, the top end of the sealing plate 531 can extend into the interior of the receiving tray 41 and seal the opening of the receiving tray 41. When the arc-shaped pressing rod 312 presses against the sealing plate 531, the sealing plate 531 moves downward and opens the opening of the receiving tray 41. When the arc-shaped pressing rod 312 leaves the sealing plate 531, the sealing plate 531 moves upward under the action of the multiple elastic ropes 533 and seals the receiving tray 41 again. By periodically opening and closing the opening of the material tray 41, large stones and hard soil clods can be more evenly introduced into the trench and mixed with the soil subsequently introduced into the trench.

[0054] This embodiment also provides a backfilling method using the above-mentioned earthwork backfilling device for trench construction, including the following steps:

[0055] S1. Push the frame 1 to the upper part of the trench and make the guide rods 12 on both sides fit against the two side walls of the trench respectively. Adjust the feeding range of the feeding mechanism 2 so that the feeding mechanism 2 can move the soil near the trench. Adjust the screen hopper 31 to a state of 5°-15° tilt with respect to the horizontal direction through the flipping part 32. Connect the receiving plate 41 to the first rotating shaft 311 through the connecting part 42.

[0056] S2. Push the frame 1 along the length of the trench. Every time it is pushed forward, the corresponding soil is moved into the trench by the material feeding mechanism 2. The screening hopper 31 intercepts large stones or hard soil clods before the soil enters the trench and guides the large stones or hard soil clods into the receiving tray 41. After the soil completely buries the pipeline and reaches the specified height above the pipeline, it is compacted by the tamping machine.

[0057] S3. After compaction, push the frame 1 to the initial position, adjust the material feeding range of the feeding mechanism 2 so that the feeding mechanism 2 can feed the remaining soil away from the trench. Adjust the screen hopper 31 to a near vertical state through the flipping part 32 so that the screen hopper 31 no longer intercepts large stones or hard soil blocks. Push the frame 1 again along the length of the trench to push all the remaining soil into the trench.

[0058] S4. During the process of pushing the soil into the trench, the receiving plate 41 is removed from the first rotating shaft 311 and supported by the supporting mechanism 5. At this time, the receiving plate 41 is in an inclined state and the end of the receiving plate 41 closest to the screen hopper 31 is the lowest end. Large stones or hard soil blocks introduced from the screen hopper 31 into the receiving plate 41 can enter the trench together with the soil.

[0059] S5. At each specified backfill depth, the soil entering the trench is compacted using a rammer.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A backfilling device for trench construction, characterized in that, include: The frame (1) has rollers (11) at the four corners of its bottom and guide rods (12) for fitting against the side wall of the trench on both sides. Material feeding mechanism (2), the material feeding mechanism (2) includes a material feeding component (21) and a lifting component (22) for driving the material feeding component (21) to rise and fall in the vertical direction; The screening mechanism (3) includes a screening hopper (31) and a tilting member (32). The screening hopper (31) is rotatably mounted at one end of the frame (1) via a first rotating shaft (311) and extends outside the frame (1). The tilting member (32) is mounted on the top of the frame (1) and can drive the screening hopper (31) to tilt. The receiving mechanism (4) includes a receiving tray (41). The end of the receiving tray (41) away from the sieve hopper (31) is rotatably mounted on the frame (1) via a second rotating shaft (411). The end of the receiving tray (41) near the sieve hopper (31) is provided with a connecting piece (42) for connecting with the first rotating shaft (311). The support mechanism (5) includes a support seat (51), which is fixed to the bottom of the frame (1) by a connecting rod (52); When the receiving tray (41) is connected to the first rotating shaft (311) via the connector (42), the end of the receiving tray (41) near the screen hopper (31) is higher than the end of the receiving tray (41) away from the screen hopper (31); when the connector (42) is separated from the first rotating shaft (311), the receiving tray (41) overlaps on the support (51) and the end of the receiving tray (41) near the screen hopper (31) is lower than the end of the receiving tray (41) away from the screen hopper (31). The flipping component (32) includes a dual-axis motor (321), and each of the two output shafts of the dual-axis motor (321) is provided with a lifting plate (322). A lifting rope (323) is wound on the lifting plate (322), and the end of the lifting rope (323) away from the lifting plate (322) is fixedly connected to the screen hopper (31). The frame (1) is provided with a guide wheel (324) for the lifting rope (323) to be placed. The frame (1) is also provided with a lifting component (6) for driving the turning component (32) to periodically lift the screen hopper (31); The lifting component (6) includes a drive motor (61), a drive shaft (62), and a cam (63). The drive shaft (62) is rotatably connected to the top of the frame (1). The drive motor (61) is fixedly installed on one side of the frame (1) and can drive the drive shaft (62) to rotate. The cam (63) is coaxially connected to the drive shaft (62). The outer contour surface of the cam (63) is provided with a rope groove (631), and the lifting rope (323) is laid in the rope groove (631). The support (51) is provided with a telescopic sealing member (53), and the receiving tray (41) is provided with a through groove (412). When the receiving tray (41) is placed on the support (51), the telescopic sealing member (53) is inserted into the through groove (412) and seals the opening of the receiving tray (41). The end of the sieve hopper (31) facing the receiving tray (41) is provided with an arc-shaped pressing rod (312). After the flipping member (32) drives the sieve hopper (31) to flip, the arc-shaped pressing rod (312) can press the telescopic sealing member (53) downward to open the opening of the receiving tray (41). The telescopic sealing member (53) includes a sealing plate (531), which is slidably disposed in the support (51). The bottom end of the sealing plate (531) extends to the lower part of the support (51) and is provided with a mounting plate (532). An elastic rope (533) is connected between the mounting plate (532) and the support (51).

2. The earthwork backfilling device for trench construction according to claim 1, characterized in that, The lifting assembly (22) includes a lifting motor (221), a lead screw (222), and a drive block (223). Two support seats (224) are provided on one side of the frame (1). The lead screw (222) is rotatably disposed between the two support seats (224). The lifting motor (221) is fixedly disposed on the top of the frame (1) and can drive the lead screw (222) to rotate. The drive block (223) is slidably connected to one side of the frame (1) in the vertical direction and threadedly connected to the lead screw (222). The material feeding assembly (21) is fixedly disposed on the drive block (223).

3. The earthwork backfilling device for trench construction according to claim 2, characterized in that, The feeding assembly (21) includes a mounting base (211), a feeding plate (212), and a gear assembly (213). The mounting base (211) is located on the side of the drive block (223) away from the frame (1). The feeding plate (212) is rotatably connected to the bottom of the mounting base (211) via a third rotating shaft (2121). The gear assembly (213) includes a rotating motor (2131), a driving gear (2132), and a driven gear (2133). The driven gear (2133) is coaxially connected to the third rotating shaft (2121). The driving gear (2132) is rotatably connected to the mounting base (211) and meshes with the driven gear (2133). The rotating motor (2131) is fixedly mounted on the mounting base (211) and can drive the driving gear (2132) to rotate.

4. The earthwork backfilling device for trench construction according to claim 3, characterized in that, The feeding plate (212) includes a fixed part (2122) and a telescopic part (2123). The bottom of the fixed part (2122) is provided with a sliding groove, and the telescopic part (2123) is slidably connected in the sliding groove. The fixed part (2122) is provided with a positioning bolt (2124), and the telescopic part (2123) is provided with a plurality of threaded holes for the positioning bolt (2124) to be inserted.

5. A backfilling method using the earthwork backfilling device for trench construction according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Push the frame (1) to the upper part of the trench and make the guide rods (12) on both sides fit against the two side walls of the trench respectively. Adjust the feeding range of the feeding mechanism (2) so that the feeding mechanism (2) can move the soil near the trench. Adjust the screen hopper (31) to a state of 5°-15° tilt to the horizontal direction through the flipping part (32). Connect the receiving plate (41) to the first rotating shaft (311) through the connecting part (42). S2. Push the frame (1) along the length of the trench. Every time it is pushed forward, the corresponding soil is moved into the trench by the material feeding mechanism (2). The screening hopper (31) intercepts large stones or hard soil blocks before the soil enters the trench and guides the large stones or hard soil blocks into the receiving tray (41). After the soil completely buries the pipeline and reaches the specified height above the pipeline, it is compacted by the tamping machine. S3. After compaction, push the frame (1) to the initial position, adjust the material feeding range of the feeding mechanism (2) so that the feeding mechanism (2) can move the remaining soil away from the trench. Adjust the screen hopper (31) to a near vertical state through the flipping part (32) so that the screen hopper (31) no longer intercepts large stones or hard soil blocks. Push the frame (1) again along the length of the trench to push all the remaining soil into the trench. S4. During the process of pushing the soil into the trench, the receiving tray (41) is removed from the first rotating shaft (311) and supported by the supporting mechanism (5). At this time, the receiving tray (41) is in an inclined state and the end of the receiving tray (41) closest to the screen hopper (31) is the lowest end. Large stones or hard soil blocks introduced from the screen hopper (31) into the receiving tray (41) can enter the trench together with the soil. S5. At each specified backfill depth, the soil entering the trench is compacted using a rammer.

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