A foundation pit filling and compacting device

Abstract

The present invention belongs to the technical field of foundation pit filling, and specifically discloses a foundation pit filling compaction device, including a pulley, a transmission motor and a support rod detachably connected to the pulley, an output shaft of the transmission motor fixedly connected to a fourth transmission wheel, two support rods on the pulley are symmetrically distributed, a rotating rod passes through the two support rods, and a swing structure is connected to the rotating rod. The top surface of the pulley is fixedly connected to a gas collecting pipe, which is a U-shaped tubular structure. Both ends of the gas collecting pipe are plugged with plug rods, and the end of the plug rod facing away from the gas collecting pipe is fixedly connected to a support seat. When the pulley in the foundation pit filling compaction device moves on the filling material, the rotating rod can drive the slide rod to squeeze the rotating column. At this time, the support seat can drive the installation cavity to slide forward. The installation cavity can pre-drive the push bar to scrape the material of the tamping block. This can avoid a lot of material accumulating in front of the pulley, which makes it inconvenient for the pulley to move on the filling material.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit filling, and specifically discloses a foundation pit filling compacting device. Background Art

[0002] When filling the foundation pit, a rammer is needed to compact the filling material inside the foundation pit. A frog-type rammer is a commonly used rammer for foundation pit filling. The frog-type rammer uses the centrifugal force of the eccentric block to drive the rammer to impact the filling material inside the foundation pit. When the eccentric block rotates, the skid seat can move forward, achieving efficient bionic compaction. It has the characteristics of simple structure and low maintenance cost.

[0003] Although the existing frog-type rammer can indeed achieve a good compacting effect on the filling material inside the foundation pit during actual use, the rammer is likely to cause other parts of the rammed earth to vibrate during actual use, which will cause the surface of the filling material to loosen after compaction. The loose material on the surface of the rammed earth mainly depends on the pulley for leveling. Although the pulley can achieve a good leveling effect on the loose material on the surface of the rammed earth during the driving process, the loose material will also make it inconvenient for the pulley to travel normally inside the foundation pit.

[0004] To this end, we propose a foundation pit filling compaction device to solve the problem that when the tamping hammer compacts the filling material, the loose materials on the rammed earth surface mainly rely on the pulley to flatten them. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a foundation pit filling and compacting device to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a foundation pit filling and compacting device, comprising a pulley, a transmission motor and a support rod being detachably connected to the pulley, an output shaft of the transmission motor being fixedly connected to a fourth transmission wheel, two support rods being symmetrically distributed on the pulley, a rotating rod passing through the two support rods, and a swinging structure being connected to the rotating rod;

[0007] The top surface of the pulley is fixedly connected to an air collecting pipe, and the air collecting pipe is a U-shaped tubular structure. Rods are inserted at both ends of the air collecting pipe, and the end of the rod facing away from the air collecting pipe is fixedly connected to a support seat. The top of the support seat is socketed with a swing structure, and the side of the support seat facing away from the rod is fixedly connected to a bulldozer mechanism, and a connecting spring is fixedly connected between the rod and the inner wall of the air collecting pipe.

[0008] In the above technical solution, further, the swing structure includes a second transmission wheel, a third transmission wheel and a rotating rod fixed on the rotating rod, the number of the rotating rods is two, a ramming block is distributed on one side of the pulley, the ramming block and the rotating rod are fixedly connected, a rotating shaft passes through the two rotating rods, a pendulum and a first transmission wheel are fixedly connected to the rotating shaft, a first transmission belt is sleeved between the first transmission wheel and the second transmission wheel, and a second transmission belt is sleeved between the third transmission wheel and the fourth transmission wheel.

[0009] In the above technical solution, further, the upper portion of the support seat is rotatably connected to a rotating column, the rotating rod is fixedly connected to a sliding rod, and the sliding rod abuts against the rotating column.

[0010] In the above technical solution, further, the insertion rod includes a sliding rubber block, the sliding rubber block is fixedly connected to the insertion rod, the sliding rubber block is slidably connected to the inside of the gas collecting pipe, and the insertion rod is fixedly connected through the sliding rubber block and the connecting spring.

[0011] In the above technical solution, further, a sealing block is sleeved on the insertion rod, the sealing block is fixedly connected to the gas collecting pipe, and a one-way air outlet valve and a one-way air inlet valve are fixedly connected to the gas collecting pipe, and the one-way air outlet valve is distributed on the gas collecting pipe near the transmission motor.

[0012] In the above technical solution, further, the bulldozer mechanism includes a fixed column fixed on the support seat, the fixed column is fixedly connected to a mounting cavity, and the mounting cavity is obliquely fixed on the support seat.

[0013] In the above technical solution, further, the installation cavity is a box structure with an opening on one side, the open end of the installation cavity is fixedly connected to the eardrum, and the lower part of the installation cavity is fixedly connected to the push bar.

[0014] In the above technical solution, further, a sealing strip is fixedly connected to the open end of the installation cavity, a sealing strip is embedded between the installation cavity and the eardrum, and a mesh-shaped indentation is provided on the side of the eardrum away from the installation cavity.

[0015] In the above technical solution, further, the installation cavity is symmetrically provided with air inlet holes, an air inlet cover is fixedly connected to the side of the installation cavity away from the eardrum, and the inner cavity of the air inlet cover is connected to the inner cavity of the air inlet hole.

[0016] In the above technical solution, further, an end of the air intake hood close to the pulley is fixedly connected to an air guide tube, and an end of the air guide tube away from the air intake hood is fixedly connected to an air bag, and the air bag abuts the pulley.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the pulley in the foundation pit filling and compacting device moves on the filling material, the rotating rod can drive the sliding rod to squeeze the rotating column. At this time, the support seat can drive the installation cavity to slide forward, and the installation cavity can pre-drive the pushing bar to scrape the material that is vibrating the tamping block, which can avoid a large amount of material accumulating in front of the pulley, resulting in the phenomenon that the pulley is inconvenient to move on the filling material.

[0019] 2. When the pushing bar in the foundation pit filling compaction device scrapes the loose materials on the filling material, the materials splashed by the hammering block will hit the eardrum, and the vibration generated by the eardrum will be transmitted to the materials scraped by the pushing bar, which can avoid the material clumping around the eardrum and enable the pushing bar to move stably on the filling material after compaction.

[0020] 3. When the tamping block in the foundation pit filling compaction device is separated from the filling material, the connecting spring will quickly drive the installation cavity close to the pulley through the insertion rod. At this time, the airbag can quickly hit the pulley. The deformed airbag can drive the air inside the air guide tube to impact the eardrum, which can realize the filling material adhered to the eardrum to be thrown forward, which can facilitate the subsequent pulley to evenly pave the material vibrated by the tamping block. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 Schematic diagram of the distribution of the installation cavity and the tamping block in the present invention;

[0023] Figure 3 Schematic diagram of the distribution of the installation cavity and the pulley in the present invention;

[0024] Figure 4 This is a diagram showing the connection structure between the mounting cavity and the support seat in the present invention;

[0025] Figure 5 This is a diagram showing the connection structure between the eardrum and the mounting cavity in the present invention;

[0026] Figure 6 Schematic diagram of the separation of the eardrum and the push bar from the mounting cavity in the present invention;

[0027] Figure 7 for Figure 4 A magnified view of middle A;

[0028] Figure 8 This is a diagram of the connection structure between the rotating column and the support seat in the present invention.

[0029] 1. Pendulum; 2. First transmission wheel; 21. Rotating shaft; 22. Ramming block; 23. First transmission belt; 24. Second transmission wheel; 25. Third transmission wheel; 26. Second transmission belt; 3. Rotating rod; 31. Sliding rod; 4. Transmission motor; 41. Fourth transmission wheel; 5. Support rod; 51. Rotating rod; 6. Gas collecting pipe; 61. Insert rod; 62. Support seat; 63. Rotating column; 64. One-way air outlet valve; 65. One-way air inlet valve; 66. Connecting spring; 67. Sealing block; 68. Sliding rubber block; 7. Pulley; 8. Tympanum; 81. Mounting cavity; 82. Push bar; 83. Fixed column; 84. Inlet cover; 85. Air guide tube; 86. Air bag; 87. Inlet hole; 88. Sealing strip; 89. Mesh indentation. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] The rammer of the existing frog-type rammer is likely to cause other parts of the rammed earth to vibrate, which will cause the surface of the compacted filling material to loosen. The loose materials on the surface of the rammed earth mainly rely on the pulley to flatten them. Although the pulley can better flatten the loose materials on the surface of the rammed earth during the driving process, the loose materials will also make it inconvenient for the pulley to travel normally inside the foundation pit. For this reason, we propose the following structure to solve the above problems.

[0033] Example 1: Please refer to Figure 1-4 As shown, the present invention provides a technical solution:

[0034] The present invention is a foundation pit filling and compacting device, comprising a pulley 7, a transmission motor 4 and a support rod 5 being detachably connected to the pulley 7, an output shaft of the transmission motor 4 being fixedly connected to a fourth transmission wheel 41, two support rods 5 being symmetrically distributed on the pulley 7, a rotating rod 51 passing through the two support rods 5, and a swinging structure being connected to the rotating rod 51;

[0035] The top surface of the pulley 7 is fixedly connected to the gas collecting pipe 6. The gas collecting pipe 6 is a U-shaped tubular structure. Both ends of the gas collecting pipe 6 are plugged with an insertion rod 61. The end of the insertion rod 61 away from the gas collecting pipe 6 is fixedly connected to a support seat 62. The upper part of the support seat 62 is sleeved with the swing structure. The side of the support seat 62 away from the insertion rod 61 is fixedly connected to the bulldozer mechanism. A connecting spring 66 is fixedly connected between the insertion rod 61 and the inner wall of the gas collecting pipe 6.

[0036] The rotating rod 51 can drive the swing structure to compact the filling material inside the foundation pit. When the insertion rod 61 slides on the gas collecting pipe 6, the insertion rod 61 can drive the bulldozer mechanism to push the material inside the foundation pit filling, which can prevent a lot of loose materials from concentrating in front of the pulley 7, so that the pulley 7 can travel stably on the filling material.

[0037] The swing structure includes a second transmission wheel 24, a third transmission wheel 25, and a rotating rod 3 fixed to the rotating rod 51. There are two rotating rods 3. A tamping block 22 is distributed on one side of the pulley 7. The tamping block 22 is fixedly connected to the rotating rod 3. A rotating shaft 21 runs through the two rotating rods 3. The pendulum 1 and the first transmission wheel 2 are fixedly connected to the rotating shaft 21. A first transmission belt 23 is sleeved between the first transmission wheel 2 and the second transmission wheel 24. A second transmission belt 26 is sleeved between the third transmission wheel 25 and the fourth transmission wheel 41.

[0038] The output shaft of the transmission motor 4 can drive the second transmission wheel 24 to rotate clockwise through the second transmission belt 26. At this time, the rotating rod 3 drives the ramming block 22 to lift up, and the second transmission wheel 24 can drive the first transmission wheel 2 to rotate through the first transmission belt 23. This can realize the swing of the pendulum 1 on the rotating shaft 21. During this process, the centrifugal force generated by the pendulum 1 can drive the ramming block 22 to hammer the filling material.

[0039] Example 2: Please refer to Figure 1-8 As shown, based on the first embodiment, the present invention provides a technical solution. Different from the first embodiment, the eardrum 8 in this embodiment transmits the vibration to the surrounding of the push bar 82, which can prevent the filling material from clumping around the push bar 82. At the same time, the push bar 82 can stably drive the filling material to move, making it easier for the pulley 7 to slide on the filling material.

[0040] The upper portion of the support seat 62 is rotatably connected to a rotating column 63, and the rotating rod 3 is fixedly connected to a sliding rod 31, which abuts against the rotating column 63;

[0041] The rotating shaft of the rotating column 63 is inserted into the support seat 62. When the rotating rod 3 swings downward, the sliding rod 31 can squeeze the rotating column 63. At this time, the rotating column 63 on the support seat 62 can rotate. As the sliding rod 31 continues to tilt and squeeze the rotating column 63, the rotating column 63 can rotate on the support seat 62. At the same time, the support seat 62 can also drive the inserted rod 61 inside the gas collecting pipe 6 to extend.

[0042] The insertion rod 61 includes a sliding rubber block 68, which is fixedly connected to the insertion rod 61. The sliding rubber block 68 is slidably connected to the inside of the gas collecting pipe 6. The insertion rod 61 is fixedly connected to the connecting spring 66 through the sliding rubber block 68.

[0043] When the insertion rod 61 inside the collecting pipe 6 is extended, the insertion rod 61 can drive the sliding rubber block 68 to slide inside the collecting pipe 6. During this process, the connecting spring 66 can be stretched and the connecting spring 66 can store force to work. When the insertion rod 61 is not under force, the connecting spring 66 with stored force can drive the insertion rod 61 to reset through the sliding rubber block 68.

[0044] A sealing block 67 is sleeved on the plug rod 61, and the sealing block 67 is fixedly connected to the gas collecting pipe 6. A one-way air outlet valve 64 and a one-way air inlet valve 65 are fixedly connected to the gas collecting pipe 6. The one-way air outlet valve 64 is distributed on the gas collecting pipe 6 near the transmission motor 4.

[0045] The sealing block 67 can seal the connection between the insertion rod 61 and the air collecting pipe 6. When the insertion rod 61 drives the connecting spring 66 to stretch through the sliding rubber block 68, the interior of the air collecting pipe 6 is in a negative pressure state. At this time, external air can enter the interior of the air collecting pipe 6 through the one-way air inlet valve 65. When the connecting spring 66 drives the insertion rod 61 to reset through the sliding rubber block 68, the air inside the air collecting pipe 6 will be discharged through the one-way air outlet valve 64. Since the one-way air outlet valve 64 is distributed on the air collecting pipe 6 close to the transmission motor 4, the air discharged by the one-way air outlet valve 64 can blow on the transmission motor 4, which can achieve rapid cooling of the transmission motor 4 and also prevent external dust from adhering to the transmission motor 4.

[0046] The bulldozer mechanism includes a fixing column 83 fixed on the support seat 62 , and a mounting cavity 81 is fixedly connected to the fixing column 83 . The mounting cavity 81 is fixed on the support seat 62 at an angle.

[0047] The installation cavity 81 is a box structure with one side open. The open end of the installation cavity 81 is fixedly connected to the eardrum 8, and the lower part of the installation cavity 81 is fixedly connected to the push bar 82.

[0048] When the insertion rod 61 extends from the interior of the gas collecting pipe 6, the support seat 62 can drive the installation cavity 81 to move forward through the fixing column 83, and then the installation cavity 81 can drive the pushing bar 82 to push the loose filling material, and at the same time, the splashing filling material will also hit the eardrum 8;

[0049] The impacted eardrum 8 will transmit the vibration to the surrounding of the pushing bar 82, which can prevent the filling material from clumping around the pushing bar 82, and can enable the pushing bar 82 to stably drive the filling material to move, avoiding more filling material from concentrating in front of the pulley 7.

[0050] Example 3: Please refer to Figure 1-8As shown, based on the second embodiment, the present invention provides a technical solution. Different from the first embodiment, the surface of the eardrum 8 in this embodiment can be deformed with the mesh indentation 89 as the center, which can realize the filling material adhered to the eardrum 8 to be thrown forward, and then the filling material adhered to the eardrum 8 can be easily flattened by the pulley 7.

[0051] The opening end of the mounting cavity 81 is fixedly connected with a sealing strip 88 , and the sealing strip 88 is embedded between the mounting cavity 81 and the eardrum 8 . A mesh-shaped indentation 89 is provided on the side of the eardrum 8 facing away from the mounting cavity 81 .

[0052] The sealing strip 88 can seal the gap between the mounting cavity 81 and the eardrum 8, thereby preventing the air inside the mounting cavity 81 from being discharged;

[0053] When the eardrum 8 inflates, the surface of the eardrum 8 can be deformed with the mesh indentation 89 as the center, which can cause the filling material adhered to the eardrum 8 to be thrown forward, thereby making it easier for the pulley 7 to flatten the filling material adhered to the eardrum 8.

[0054] The mounting cavity 81 is symmetrically provided with air inlet holes 87 . An air inlet cover 84 is fixedly connected to the side of the mounting cavity 81 facing away from the eardrum 8 . The inner cavity of the air inlet cover 84 is communicated with the inner cavity of the air inlet holes 87 .

[0055] An air guide tube 85 is fixedly connected to one end of the air intake cover 84 close to the pulley 7, and an air bag 86 is fixedly connected to the other end of the air guide tube 85 away from the air intake cover 84. The air bag 86 abuts against the pulley 7.

[0056] When the support seat 62 is resetting, the support seat 62 can drive the installation cavity 81 to reset, and at the same time the airbag 86 can hit the pulley 7. When the airbag 86 hits the pulley 7, the air inside the airbag 86 will enter the interior of the installation cavity 81 through the air guide tube 85, thereby realizing that the interior of the installation cavity 81 is in a high-pressure state, and then the eardrum 8 is inflated. The surface of the eardrum 8 can be deformed with the mesh indentation 89 as the center, so that the filling material adhered to the eardrum 8 is thrown forward.

[0057] Working principle: In actual use, the output shaft of the transmission motor 4 can drive the second transmission wheel 24 to rotate clockwise through the second transmission belt 26. At this time, the rotating rod 3 drives the tamping block 22 to lift up, and the second transmission wheel 24 can drive the first transmission wheel 2 to rotate through the first transmission belt 23, so that the pendulum 1 on the rotating shaft 21 can swing. In this process, the centrifugal force generated by the pendulum 1 can drive the tamping block 22 to hammer the filling material, thereby realizing the compaction of the filling material inside the foundation pit;

[0058] When the tamping block 22 tamps the filling material inside the foundation pit, the surface of the filling material after tamping will become loose, and the downward swinging rotating rod 3 will drive the sliding rod 31 to squeeze the rotating column 63. At this time, the rotating column 63 on the support seat 62 can rotate, and the support seat 62 can also drive the plug rod 61 inside the air collecting pipe 6 to extend. When the plug rod 61 drives the connecting spring 66 to stretch through the sliding rubber block 68, the interior of the air collecting pipe 6 is in a negative pressure state. At this time, external air can enter the interior of the air collecting pipe 6 through the one-way air inlet valve 65. When the connecting spring 66 drives the plug rod 61 to reset through the sliding rubber block 68, the air inside the air collecting pipe 6 will be discharged through the one-way air outlet valve 64. Since the one-way air outlet valve 64 is distributed on the air collecting pipe 6 near the transmission motor 4, the air discharged by the one-way air outlet valve 64 can blow on the transmission motor 4, which can achieve rapid cooling of the transmission motor 4, and at the same time can prevent external dust from adhering to the transmission motor 4, and can prevent the transmission motor 4 from being damaged by high temperature, thereby improving the service life of the transmission motor 4;

[0059] When the insertion rod 61 extends from the inside of the gas collecting pipe 6, the support seat 62 can drive the installation cavity 81 to move forward through the fixing column 83, so that the installation cavity 81 can drive the pushing bar 82 to push the loose filling material. At the same time, the splashing filling material will also hit the eardrum 8. The impacted eardrum 8 will transmit the vibration to the surrounding of the pushing bar 82, which can prevent the filling material from clumping around the pushing bar 82, and can realize that the pushing bar 82 can stably drive the filling material to move, and avoid that a large amount of filling material is concentrated in front of the pulley 7, so that the pulley 7 can move stably on the foundation pit fill material;

[0060] When the support seat 62 is resetting, the support seat 62 can drive the installation cavity 81 to reset, and at the same time the airbag 86 can hit the pulley 7. When the airbag 86 hits the pulley 7, the air inside the airbag 86 will enter the interior of the installation cavity 81 through the air guide tube 85, which realizes that the interior of the installation cavity 81 is in a high-pressure state, and then the eardrum 8 is inflated. The surface of the eardrum 8 can be deformed with the mesh indentation 89 as the center, so that the filling material adhered to the eardrum 8 is thrown forward, which can facilitate the subsequent pulley 7 to level the loose filling material on the surface of the foundation pit.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A foundation pit filling and compacting device, comprising a pulley (7), characterized in that: The pulley (7) is detachably connected to a transmission motor (4) and a support rod (5); the output shaft of the transmission motor (4) is fixedly connected to a fourth transmission wheel (41); two support rods (5) on the pulley (7) are symmetrically distributed; a rotating rod (51) runs through the two support rods (5); and a swing structure is connected to the rotating rod (51); The top surface of the pulley (7) is fixedly connected to an air collecting pipe (6), the air collecting pipe (6) is a U-shaped tubular structure, both ends of the air collecting pipe (6) are plugged with an insertion rod (61), one end of the insertion rod (61) facing away from the air collecting pipe (6) is fixedly connected to a support seat (62), the upper part of the support seat (62) is sleeved with a swing structure, the side of the support seat (62) facing away from the insertion rod (61) is fixedly connected to a bulldozer mechanism, and a connecting spring (66) is fixedly connected between the insertion rod (61) and the inner wall of the air collecting pipe (6).

2. A foundation pit filling and compacting device according to claim 1, characterized in that: The swing structure comprises a second transmission wheel (24), a third transmission wheel (25) and a rotating rod (3) fixed on a rotating rod (51), wherein the number of the rotating rods (3) is two, a tamping block (22) is distributed on one side of the pulley (7), the tamping block (22) and the rotating rod (3) are fixedly connected, a rotating shaft (21) passes through the two rotating rods (3), a pendulum (1) and a first transmission wheel (2) are fixedly connected to the rotating shaft (21), a first transmission belt (23) is sleeved between the first transmission wheel (2) and the second transmission wheel (24), and a second transmission belt (26) is sleeved between the third transmission wheel (25) and the fourth transmission wheel (41).

3. A foundation pit filling and compacting device according to claim 2, characterized in that: The upper portion of the support seat (62) is rotatably connected to a rotating column (63), the rotating rod (3) is fixedly connected to a sliding rod (31), and the sliding rod (31) abuts against the rotating column (63).

4. The foundation pit filling and compacting device according to claim 1, characterized in that: The insertion rod (61) includes a sliding rubber block (68), the sliding rubber block (68) is fixedly connected to the insertion rod (61), the sliding rubber block (68) is slidably connected to the inside of the gas collecting pipe (6), and the insertion rod (61) is fixedly connected via the sliding rubber block (68) and the connecting spring (66).

5. The foundation pit filling and compacting device according to claim 1, characterized in that: A sealing block (67) is sleeved on the insertion rod (61), and the sealing block (67) is fixedly connected to the gas collecting pipe (6). A one-way air outlet valve (64) and a one-way air inlet valve (65) are fixedly connected to the gas collecting pipe (6), and the one-way air outlet valve (64) is distributed on the gas collecting pipe (6) near the transmission motor (4).

6. The foundation pit filling and compacting device according to claim 1, characterized in that: The bulldozer mechanism comprises a fixing column (83) fixed on a support seat (62), a mounting cavity (81) fixedly connected to the fixing column (83), and the mounting cavity (81) is fixed obliquely on the support seat (62).

7. The foundation pit filling and compacting device according to claim 6, characterized in that: The installation cavity (81) is a box structure with an opening on one side. The open end of the installation cavity (81) is fixedly connected to the eardrum (8), and the lower part of the installation cavity (81) is fixedly connected to the push bar (82).

8. The foundation pit filling and compacting device according to claim 7, characterized in that: The opening end of the mounting cavity (81) is fixedly connected to a sealing strip (88), a sealing strip (88) is embedded between the mounting cavity (81) and the eardrum (8), and a mesh-shaped indentation (89) is provided on the side of the eardrum (8) facing away from the mounting cavity (81).

9. The foundation pit filling and compacting device according to claim 7, characterized in that: The mounting cavity (81) is symmetrically provided with air inlet holes (87), and an air inlet cover (84) is fixedly connected to the side of the mounting cavity (81) facing away from the eardrum (8), and the inner cavity of the air inlet cover (84) is in communication with the inner cavity of the air inlet hole (87).

10. The foundation pit filling and compacting device according to claim 9, characterized in that: An end of the air intake cover (84) close to the pulley (7) is fixedly connected to an air guide tube (85), and an end of the air guide tube (85) away from the air intake cover (84) is fixedly connected to an air bag (86), and the air bag (86) is in contact with the pulley (7).

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