Expressway subgrade backfilling device and backfilling method

Abstract

The present application relates to the backfilling technical field of highway subgrade, in particular to a highway subgrade backfilling device and method, the backfilling device comprises a transport trolley, a feeding assembly, a lateral adjusting assembly and a shunting and dropping assembly, and has the beneficial effects that: the automatic dropping purpose is achieved through the adaptive connection of the transport trolley and the lateral pipeline, the backfilling efficiency is greatly improved, the backfilling material is scattered by using the waiting material box, the purposes of filling compaction and preventing blockage are achieved, the lateral position is adjusted by setting the adjusting box, the distance between the trolley and the backfilling pit is adjusted, the width of the dropped material is adapted to the width of the backfilling pit through the cooperation of the material distribution box and the discharging strip, so that the backfilling efficiency is improved and automatic transportation operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of highway subgrade backfilling technology, specifically to a highway subgrade backfilling device and backfilling method. Background Technology

[0002] During the construction of highways, a semi-side construction method is often used to ensure traffic flow. During construction, side panels are used to protect the side walls of the roadbed, thereby ensuring the regularity of the road's sides.

[0003] However, after the roadbed side panels are removed, a long, recessed groove will be formed between the road and the curb. Current technology usually uses backfilling to repair it.

[0004] However, due to the small width and varying dimensions of the roadbed side trenches, automated mechanical backfilling is difficult to achieve, and manual construction is the only option. Since highways are long, the workload of manual construction is large, requiring backfilling and transportation equipment to be used in sync with manual labor, which seriously affects the safe passage of highways. Summary of the Invention

[0005] The purpose of this invention is to provide a highway subgrade backfilling device and backfilling method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A highway subgrade backfilling device, the backfilling device comprising:

[0008] A transport trolley, located inside the roadbed, is filled with backfill material;

[0009] The feeding assembly includes a waiting box, a feeding funnel, and a connecting pipe. The feeding assembly is fixed on the side of the transport trolley near the roadbed backfill pit. The upper end of the feeding funnel is directly opposite the carriage of the transport trolley, and the lower end of the feeding funnel is connected to the waiting box. A screening ball for breaking up the backfill material is rotatably installed in the waiting box, and the lower end of the waiting box is vertically connected to the connecting pipe.

[0010] A lateral adjustment assembly includes an adjustment box, a folded hose, and an inclined tube. The upper end of the folded hose is fixed to the adjustment box and is connected to the lower end of the connecting tube. The lower end of the folded hose is slidably installed in the inner cavity of the adjustment box and is vertically connected to the inclined tube.

[0011] The material distribution assembly includes a material distribution box, a distribution pipe, and a discharge bar. The material distribution box is located directly above the roadbed backfill pit. The upper end of the material distribution box is connected to the lower end of the inclined pipe. Multiple sets of baffles are linearly distributed in the material distribution box, and inclined overflow ports are connected to each other on the baffles. The lower end of the material distribution box is connected to the discharge bar through multiple sets of linearly distributed distribution pipes. A pair of adjusting crossbars are symmetrically inserted horizontally on the discharge bar. The upper end of the adjusting crossbars is sealed at the lower end port of the distribution pipe.

[0012] Preferably, the lower end of the transport trolley is provided with a pair of easy-to-move rollers, which are driven by an electric device. A support base is horizontally fixedly welded to the side wall of the transport trolley, and the connecting pipe is vertically inserted into the support base. A limiting ear is provided on the outer wall of the connecting pipe and pressed onto the support base. The waiting box and the adjusting box are both fixed to the outer wall of the transport trolley.

[0013] Preferably, the inner cavity of the waiting box is provided with a rotating inner cavity, the screening ball is driven by a motor installed on the waiting box, the screening ball is composed of a pair of hollow hemispherical screens that are symmetrical from left to right, a double-layer plate is vertically clamped between adjacent hollow hemispheres, a screen plate is horizontally fixed between adjacent hollow hemispheres, the upper end of the waiting box is provided with an upper connecting groove that connects to the feed funnel, the double-layer plate is in the shape of a ring, and the upper end of the gap between the double-layer plates is directly opposite the upper connecting groove.

[0014] Preferably, the lower end of the rotating inner cavity is provided with a pair of inclined flow channels that are symmetrically connected to the upper end ports of the connecting pipes. A rotating seat is fixedly installed between adjacent inclined flow channels. The lower end of the double-layer plate is rotatably clamped on the rotating seat. Multiple sets of connecting rods are arranged in a circumferential array between the double-layer plates. The gap between adjacent connecting rods is larger than the mesh gap of the hollow hemispherical screen.

[0015] Preferably, the sieve plate is installed horizontally between adjacent hollow hemispheres, and the sieve plate is provided with a crisscrossing inner frame. The gaps in the inner frame are filled with sieve mesh, and multiple sets of linearly distributed pointed cones are provided on the outer walls of the upper and lower ends of the inner frame.

[0016] Preferably, the inner cavity of the regulating box is configured as an regulating inner cavity, and a pair of horizontally extending sliding grooves for raising are provided on the front and rear side walls of the regulating inner cavity. An upper connecting plate is provided at the lower end of the folding hose, and a lower connecting plate is provided at the upper end of the inclined tube. Both the lower end of the upper connecting plate and the upper end of the lower connecting plate are provided with circular ear seats. The pair of circular ear seats distributed vertically are connected by a pair of left and right symmetrical fixing bolts. The front and rear outer walls of the circular ear seats are clamped and slidably installed in the sliding grooves.

[0017] Preferably, a first clamping block and a second clamping block are respectively clamped on both sides of an adjacent pair of circular ear seats. The first clamping block and the second clamping block are provided with slots, which are fixed to the circular ear seats by fixing bolts. A fixing rod is provided laterally on the outer side of the first clamping block, and a screw is provided laterally on the outer side of the second clamping block. The two sides of the adjustment box are respectively provided with through holes corresponding to the fixing rod and screw holes corresponding to the screw. The fixing rod is fixed to the side wall of the adjustment box by locking nuts. A spring is laterally sleeved on the fixing rod. The spring is pressed between the first clamping block and the inner wall of the adjustment cavity. The end of the screw is rotatably mounted on the second clamping block by bearings.

[0018] Preferably, the material distribution box is divided into multiple sets of partitioned spaces by partitions, and the inner diameter of the inclined overflow port on the linearly distributed multiple sets of partitions increases from the middle to both sides.

[0019] Preferably, telescopic slots are provided through both sides of the discharge bar, a through-strip groove is provided through the front end of the discharge bar, a sealing groove is provided on the upper inner wall of the inner cavity of the discharge bar, a pair of symmetrical adjustment bars are inserted into the telescopic slots, a sealing strip is provided at the upper end of the adjustment bar and slides against the sealing groove, and a fixing post is provided vertically on the outer wall of the end of the adjustment bar and extends outward along the through-strip groove, the fixing post is fixed to the outer wall of the discharge bar by a nut.

[0020] A backfilling method based on the aforementioned highway subgrade backfilling device, the backfilling method comprising the following steps:

[0021] Lateral adjustment is achieved by rotating and squeezing the screw's lateral thread to adjust the position of the lower end of the folded hose, thereby pulling the inclined tube to achieve lateral adjustment, so that the discharge bar and the distribution box are located directly above the roadbed backfill pit;

[0022] Width adaptation: The position of the horizontal bar can be adjusted by lateral sliding to make the discharge width of the discharge bar match the inner diameter of the backfill pit.

[0023] Feeding: The backfill material, such as soil and gravel, is transported from the transport trolley to the feed hopper by manual or mechanical transmission. The rotating screening ball fully disperses the backfill material, which then falls into the distribution box along the connecting pipe, folded hose and inclined pipe.

[0024] The material is diverted and discharged. The partition ensures that the middle cavity of the material distribution box is filled first, and the material overflows to both sides through the inclined overflow port. Then, the discharge bar fills the backfill pit.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention achieves automatic material unloading by setting up a matching connection between the transport trolley and the lateral pipe, which greatly improves the efficiency of backfilling. At the same time, the material waiting box is used to disperse the backfill material, so as to achieve compaction and prevent blockage. The lateral position can be adjusted by setting up an adjustment box to adjust the distance between the matching trolley and the backfill pit. By setting up a material distribution box and a discharge bar, the width of the discharge is adapted to the width of the backfill pit, thereby improving the backfilling efficiency and realizing automated transportation operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0029] Figure 3 This is a three-dimensional structural diagram of the folding flexible hose connection of the present invention;

[0030] Figure 4 for Figure 2 Enlarged view of the structure at point C;

[0031] Figure 5 This is a schematic diagram of the material receiving box structure of the present invention;

[0032] Figure 6 for Figure 1 Enlarged view of the structure at point B in the middle;

[0033] Figure 7 This is a schematic diagram of the three-dimensional structure of the screening ball of the present invention;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the screening ball of the present invention in half section;

[0035] Figure 9 This is a three-dimensional structural diagram of the material distribution box of the present invention;

[0036] Figure 10 This is a schematic diagram of the three-dimensional structure of the first clamping block of the present invention;

[0037] Figure 11 This is a schematic diagram of the three-dimensional structure of the adjusting horizontal bar of the present invention.

[0038] In the diagram: 1. Transport trolley; 2. Roller; 3. Material waiting box; 4. Feed funnel; 5. Screening ball; 6. Connecting pipe; 7. Adjusting box; 8. Adjusting inner cavity; 9. Inclined pipe; 10. Distribution box; 11. Discharge bar; 12. Upper connecting plate; 13. Folded flexible hose; 14. Lower connecting plate; 15. Fixing rod; 16. First clamping block; 17. Second clamping block; 18. Screw; 19. Fixing bolt; 20. Circular lug seat; 21. Screw hole; 22. Spring; 23. Bearing; 24. Locking screw 25. Mother; 26. Through hole; 27. Slide groove; 28. Rotating inner cavity; 29. ​​Rotating seat; 30. Motor; 31. Double-layer plate; 32. Connecting rod; 33. Screen plate; 34. Inner frame; 35. Cone; 36. Upper connecting groove; 37. Limiting ear seat; 38. Support seat; 39. Partition plate; 40. Inclined overflow port; 41. Slot; 42. Diverter pipe; 43. Adjusting crossbar; 44. Sealing strip; 45. Sealing groove; 46. Fixed column; 47. Through long strip groove; 48. Telescopic slot. Detailed Implementation

[0039] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1 to 11 The present invention provides a technical solution:

[0041] Example 1:

[0042] A highway subgrade backfilling device, comprising a transport trolley 1, a feeding assembly, a lateral adjustment assembly, and a diversion and discharge assembly.

[0043] The transport trolley 1 is located on the inner side of the roadbed, and the transport trolley 1 is filled with backfill material.

[0044] The transport trolley 1 facilitates the convenient transport of backfill materials.

[0045] The feeding assembly includes a waiting box 3, a feeding funnel 4, and a connecting pipe 6. The feeding assembly is fixed on the side of the transport trolley 1 near the roadbed backfill pit. The upper end of the feeding funnel 4 is directly opposite the carriage of the transport trolley 1, and the lower end of the feeding funnel 4 is connected to the waiting box 3. A screening ball 5 for breaking up the backfill material is rotatably installed in the waiting box 3, and the lower end of the waiting box 3 is vertically connected to the connecting pipe 6.

[0046] By setting up rotating screening balls 5, the backfill material is fully dispersed and screened to prevent pipe blockage, avoid blockage, and improve the compactness of the filling.

[0047] The lateral adjustment assembly includes an adjustment box 7, a folded hose 13, and an inclined tube 9. The upper end of the folded hose 13 is fixed on the adjustment box 7, and the upper end of the folded hose 13 is connected to the lower end of the connecting tube 6. The lower end of the folded hose 13 is slidably installed in the inner cavity of the adjustment box 7, and the lower end of the folded hose 13 is vertically connected to the inclined tube 9.

[0048] The lateral position of the inclined tube 9 is adjusted by setting a folded flexible hose 13 that slides laterally. The inclined tube 9 pulls the material distribution box 10 and the discharge bar 11 to slide laterally, so that the discharge position is adapted to the backfill pit, thereby facilitating the adjustment of the lateral distance between the transport trolley 1 and the backfill pit.

[0049] The material distribution assembly includes a material distribution box 10, a distribution pipe 41, and a discharge bar 11. The material distribution box 10 is located directly above the roadbed backfill pit. The upper end of the material distribution box 10 is connected to the lower end of the inclined pipe 9. Multiple sets of baffles 38 are linearly distributed in the material distribution box 10. Inclined overflow ports 39 are connected to each other on the baffles 38. The lower end of the material distribution box 10 is connected to the discharge bar 11 through multiple sets of linearly distributed distribution pipes 41. A pair of adjusting crossbars 42 are symmetrically inserted into the discharge bar 11. The upper end of the adjusting crossbars 42 is sealed at the lower end port of the distribution pipe 41.

[0050] The partition 38 ensures that the middle cavity of the material distribution box 10 is filled first, and the material overflows to both sides through the inclined overflow port 39, and then the material discharge bar 11 fills the backfill pit.

[0051] Example 2:

[0052] Based on Embodiment 1, a pair of easily movable rollers 2 are provided at the lower end of the transport trolley 1. The rollers 2 are driven by an electric device. A support base 37 is horizontally fixedly welded to the side wall of the transport trolley 1. A connecting pipe 6 is vertically inserted into the support base 37. A limiting ear 36 is provided on the outer wall of the connecting pipe 6 and pressed onto the support base 37. The waiting box 3 and the adjusting box 7 are both fixed on the outer wall of the transport trolley 1.

[0053] By setting rollers 2 to facilitate transportation, and by setting limit lugs 36 to cooperate with support bases 37, the installation stability of connecting pipe 6 is achieved.

[0054] Example 3:

[0055] Based on embodiment 1, a rotating inner cavity 27 is provided in the inner cavity of the waiting box 3. The screening ball 5 is driven by a motor 29 installed on the waiting box 3. The screening ball 5 is composed of a pair of hollow hemispherical screens that are symmetrical on the left and right. A double-layer plate 30 is vertically clamped between adjacent hollow hemispheres. A screen plate 32 is horizontally fixed between adjacent hollow hemispheres. An upper connecting groove 35 that connects to the feed funnel 4 is provided at the upper end of the waiting box 3. The double-layer plate 30 is in the shape of a ring. The upper end of the gap between the double-layer plates 30 is directly opposite the upper connecting groove 35.

[0056] The purpose of accurate feeding is achieved by setting up a double-layer plate 30, and the backfill material falling into the feed is impacted, broken up and screened by using a sieve plate 32.

[0057] Example 4:

[0058] Based on embodiment 3, the lower end of the rotating inner cavity 27 is provided with a pair of inclined flow channels symmetrically connected to the upper end ports of the connecting pipes 6. A rotating seat 28 is fixedly installed between adjacent inclined flow channels. The lower end of the double-layer plate 30 is rotatably clamped on the rotating seat 28. Multiple sets of connecting rods 31 are arranged in a circumferential array between the double-layer plates 30. The gap between adjacent connecting rods 31 is larger than the mesh gap of the hollow hemispherical screen.

[0059] The connecting rod 31 is used to initially buffer and disperse the backfill material, and the rotating seat 28 is used to maintain the angle of the circumferential rotation of the screening ball 5 and the double-layer plate 30 to avoid deviation.

[0060] Example 5:

[0061] Based on Example 4, the sieve plate 32 is installed horizontally between adjacent hollow hemispheres, and the sieve plate 32 is provided with a crisscrossing inner frame 33. The gaps in the inner frame 33 are filled with sieve mesh, and multiple sets of linearly distributed pointed cones 34 are provided on the outer walls of the upper and lower ends of the inner frame 33.

[0062] By setting the pointed cone 34, the impact on the backfill material is enhanced, and the dispersing efficiency is improved. The internal frame 33 is used to improve the structural strength of the sieve plate 32 and avoid deformation under the impact of the backfill material.

[0063] Example 6:

[0064] Based on embodiment 1, the inner cavity of the regulating box 7 is configured as an regulating inner cavity 8. A pair of horizontally extending sliding grooves 26 for climbing are provided on the front and rear side walls of the regulating inner cavity 8. An upper connecting plate 12 is provided at the lower end of the folding hose 13, and a lower connecting plate 14 is provided at the upper end of the inclined tube 9. Both the lower end of the upper connecting plate 12 and the upper end of the lower connecting plate 14 are provided with circular ear seats 20. The pair of circular ear seats 20 distributed vertically are connected by a pair of left and right symmetrical fixing bolts 19. The front and rear outer walls of the circular ear seats 20 are clamped and slidably installed in the sliding grooves 26.

[0065] By setting the circular ear seat 20 and the slide groove 26 in cooperation, the lateral limiting sliding adjustment is achieved.

[0066] Example 7:

[0067] Based on embodiment 6, a first clamping block 16 and a second clamping block 17 are respectively clamped on both sides of an adjacent pair of circular ear seats 20. The first clamping block 16 and the second clamping block 17 are provided with slots 40, which are fixed to the circular ear seats 20 by fixing bolts 19. A fixing rod 15 is provided laterally on the outer side of the first clamping block 16, and a screw 18 is provided laterally on the outer side of the second clamping block 17. The two sides of the adjustment box 7 are respectively provided with through holes 25 corresponding to the fixing rod 15 and screw holes 21 corresponding to the screw 18. The fixing rod 15 is fixed to the side wall of the adjustment box 7 by locking nuts 24. A spring 22 is laterally sleeved on the fixing rod 15. The spring 22 is pressed between the first clamping block 16 and the inner wall of the adjustment cavity 8. The end of the screw 18 is rotatably mounted on the second clamping block 17 by bearing 23.

[0068] The lateral adjustment of the upper end of the inclined tube 9 is achieved by the screw 18 rotating and pressing. The position is elastically fixed by the spring 22. The fixed rod 15 is used to further fix the adjusted lateral position, so as to avoid deviation when the transport trolley 1 is running, thereby improving the accuracy and stability of backfilling.

[0069] Example 8:

[0070] Based on Example 1,

[0071] The material distribution box 10 is divided into multiple partitioned spaces by partitions 38. The inner diameter of the inclined overflow ports 39 on the linearly distributed partitions 38 increases from the middle to both sides. Telescopic slots 47 are provided through both sides of the discharge bar 11. A through-strip groove 46 is provided through the front end of the discharge bar 11. A sealing groove 44 is provided on the upper inner wall of the inner cavity of the discharge bar 11. A pair of symmetrical adjusting crossbars 42 are inserted laterally into the telescopic slots 47. A sealing strip 43 is provided at the upper end of the adjusting crossbar 42 and slides against the sealing groove 44. A fixing post 45 extending outward along the through-strip groove 46 is provided vertically on the outer wall of the end of the adjusting crossbar 42. The fixing post 45 is fixed to the outer wall of the discharge bar 11 by nuts.

[0072] By setting the sealing groove 44 and the sealing strip 43 together, the sealing performance between the horizontal bar 42 and the lower end port of the diversion pipe 41 can be adjusted. By adjusting the lateral sliding of the horizontal bar 42, the lateral width of the discharge bar 11 can be adjusted so that the discharge length is compatible with the inner diameter width of the backfill pit.

[0073] A backfilling method based on the aforementioned highway subgrade backfilling device includes the following steps:

[0074] Lateral adjustment is achieved by rotating and squeezing the screw 18 through the lateral thread to adjust the position of the lower end of the folded hose 13, thereby pulling the inclined pipe 9 to achieve lateral adjustment, so that the discharge bar 11 and the distribution box 10 are located directly above the roadbed backfill pit.

[0075] Width adaptation: The position of the horizontal bar 42 is adjusted by lateral sliding so that the discharge width of the discharge bar 11 matches the inner diameter width of the backfill pit.

[0076] Feeding: The backfill material, such as soil and gravel, on the transport trolley 1 is transported to the feed hopper 4 by manual or mechanical transmission. The rotating screening ball 5 fully disperses the backfill material. The dispersed backfill material falls into the distribution box 10 along the connecting pipe 6, the folded hose 13 and the inclined pipe 9.

[0077] The material is diverted and discharged. The partition 38 ensures that the middle inner cavity of the material distribution box 10 is filled first, and the material overflows to both sides through the inclined overflow port 39. Then, the material discharge bar 11 fills the backfill pit.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highway subgrade backfilling device, characterized in that: The backfilling device includes: The transport trolley (1) is located on the inner side of the roadbed and is filled with backfill material. The feeding assembly includes a waiting box (3), a feeding funnel (4), and a connecting pipe (6). The feeding assembly is fixed on the side of the transport trolley (1) near the roadbed backfill pit. The upper end of the feeding funnel (4) is directly opposite the carriage of the transport trolley (1), and the lower end of the feeding funnel (4) is connected to the waiting box (3). A screening ball (5) for dispersing backfill material is rotatably installed in the waiting box (3), and the lower end of the waiting box (3) is vertically connected to the connecting pipe (6). The lateral adjustment assembly includes an adjustment box (7), a folded hose (13), and an inclined tube (9). The upper end of the folded hose (13) is fixed on the adjustment box (7), and the upper end of the folded hose (13) is connected to the lower end of the connecting tube (6). The lower end of the folded hose (13) is slidably installed in the inner cavity of the adjustment box (7), and the lower end of the folded hose (13) is vertically connected to the inclined tube (9). The material distribution assembly includes a material distribution box (10), a distribution pipe (41), and a discharge bar (11). The material distribution box (10) is located directly above the roadbed backfill pit. The upper end of the material distribution box (10) is connected to the lower end of the inclined pipe (9). The material distribution box (10) is provided with multiple sets of linearly distributed partitions (38). The partitions (38) are provided with inclined overflow ports (39) that are interconnected. The lower end of the material distribution box (10) is connected to the discharge bar (11) through multiple sets of linearly distributed distribution pipes (41). A pair of adjusting crossbars (42) are symmetrically inserted into the discharge bar (11). The upper end of the adjusting crossbars (42) is sealed on the lower end port of the distribution pipe (41). The material distribution box (10) is divided into multiple sets of separated spaces by the partitions (38). The inner diameter of the inclined overflow ports (39) on the multiple sets of linearly distributed partitions (38) increases from the middle to both sides. The inner cavity of the waiting box (3) is provided with a rotating inner cavity (27). The screening ball (5) is driven by a motor (29) installed on the waiting box (3). The screening ball (5) is composed of a pair of hollow hemispherical screens that are symmetrical on the left and right. A double-layer plate (30) is vertically clamped between adjacent hollow hemispherical screens. A screen plate (32) is horizontally fixed between adjacent hollow hemispherical screens. An upper connecting groove (35) connecting the feeding funnel (4) is provided at the upper end of the waiting box (3). The double-layer plate (30) is in the shape of a ring. The upper end of the gap between the double-layer plates (30) is directly opposite the upper connecting groove (35). The lower end of the rotating inner cavity (27) is provided with a pair of inclined flow channels symmetrically connected to the upper end ports of the connecting pipes (6). A rotating seat (28) is fixedly installed between the adjacent inclined flow channels. The lower end of the double-layer plate (30) is rotatably clamped on the rotating seat (28). Multiple sets of connecting rods (31) are arranged in a circular array between the double-layer plates (30). The gap between adjacent connecting rods (31) is larger than the mesh gap of the hollow hemispherical screen. The sieve plate (32) is installed horizontally between adjacent hollow hemispherical sieves, and the sieve plate (32) is provided with a crisscrossing inner frame (33). The gaps in the inner frame (33) are filled with sieves, and multiple sets of linearly distributed cones (34) are provided on the outer walls of the upper and lower ends of the inner frame (33).

2. The highway subgrade backfilling device according to claim 1, characterized in that: The lower end of the transport trolley (1) is provided with a pair of easy-to-move rollers (2), which are driven by an electric device. A support seat (37) is horizontally fixedly welded on the side wall of the transport trolley (1). The connecting pipe (6) is vertically inserted into the support seat (37). A limiting ear seat (36) is provided on the outer wall of the connecting pipe (6) and pressed onto the support seat (37). The waiting box (3) and the adjusting box (7) are both fixed on the outer wall of the transport trolley (1).

3. The highway subgrade backfilling device according to claim 1, characterized in that: The inner cavity of the regulating box (7) is configured as an regulating inner cavity (8). A pair of horizontally extending slide grooves (26) of equal height are provided on the front and rear side walls of the regulating inner cavity (8). The lower end of the folded hose (13) is provided with an upper connecting plate (12). The upper end of the inclined tube (9) is provided with a lower connecting plate (14). The lower end of the upper connecting plate (12) and the upper end of the lower connecting plate (14) are both provided with circular ear seats (20). The pair of circular ear seats (20) distributed vertically are connected by a pair of left and right symmetrical fixing bolts (19). The front and rear outer walls of the circular ear seats (20) are clamped and slidably installed in the slide grooves (26).

4. A highway subgrade backfilling device according to claim 3, characterized in that: The first clamping block (16) and the second clamping block (17) are respectively clamped on both sides of the adjacent pair of ring lugs (20). The first clamping block (16) and the second clamping block (17) are provided with slots (40). The slots (40) are fixed to the ring lugs (20) by fixing bolts (19). A fixing rod (15) is provided laterally on the outer side of the first clamping block (16), and a screw (18) is provided laterally on the outer side of the second clamping block (17). The two sides of the adjusting box (7) The fixed rod (15) is provided with a through hole (25) corresponding to the fixed rod (15) and a screw hole (21) corresponding to the screw (18). The fixed rod (15) is fixed to the side wall of the adjustment box (7) by a locking nut (24). A spring (22) is horizontally sleeved on the fixed rod (15). The spring (22) is pressed between the first clamping block (16) and the inner wall of the adjustment cavity (8). The end of the screw (18) is rotatably mounted on the second clamping block (17) through a bearing (23).

5. A highway subgrade backfilling device according to claim 1, characterized in that: The discharge bar (11) has telescopic slots (47) through both sides, and a through-strip groove (46) through the front end of the discharge bar (11). A sealing groove (44) is provided on the inner wall of the upper end of the inner cavity of the discharge bar (11). A pair of symmetrical adjustment bars (42) are inserted into the telescopic slots (47). A sealing strip (43) that slides and fits against the sealing groove (44) is provided on the upper end of the adjustment bar (42). A fixing post (45) extending outward along the through-strip groove (46) is provided on the outer wall of the end of the adjustment bar (42). The fixing post (45) is fixed to the outer wall of the discharge bar (11) by a nut.

6. A backfilling method implemented by the highway subgrade backfilling device according to claim 4, characterized in that: The backfilling method includes the following steps: Lateral adjustment is achieved by rotating and squeezing the screw (18) through the lateral thread to adjust the lower end position of the folded hose (13), thereby pulling the inclined tube (9) to achieve lateral adjustment, so that the discharge bar (11) and the distribution box (10) are located directly above the roadbed backfill pit; Width adaptation: The position of the horizontal bar (42) is adjusted by lateral sliding so that the discharge width of the discharge bar (11) is adapted to the inner diameter width of the backfill pit; Feeding: The backfill material on the transport trolley (1) is transported to the feed hopper (4) by manual or mechanical transmission. The backfill material is fully dispersed by the rotating screening ball (5). The dispersed backfill material falls into the distribution box (10) along the connecting pipe (6), the folded hose (13) and the inclined pipe (9). The material is diverted and discharged. The partition (38) ensures that the middle inner cavity of the material distribution box (10) is filled first. The material overflows to both sides through the inclined overflow port (39). The material is then filled into the backfill pit through the discharge strip (11).

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