Small tamping device for building foundation

Abstract

The invention discloses a small tamping device for a building foundation, and belongs to the technical field of building engineering. The tamping device comprises a movable frame, a sleeve fixedly arranged on the movable frame, and a tamping hammer which penetrates through the bottom of the sleeve and is connected into the sleeve in a sliding mode. The driving structure is arranged on the movable frame, connected with the sleeve and used for driving the ramming hammer to repeatedly ascend and descend for ramming earth; and the spraying structure is arranged on the movable frame and used for reducing dust. According to the small tamping device for the building foundation, the transmission assembly is connected with the driving structure, spraying water in the water bucket is driven to be sprayed out through the water spraying opening of the spraying pipe only when the tamping hammer ascends, by means of the intermittent spraying mode, continuous water spraying is reduced, so that the water content of local soil of the dry foundation exceeds the optimal compaction interval, the tamping compactness is guaranteed, and the tamping efficiency is improved. Meanwhile, the opening and closing plate is arranged at the water spraying opening and is sealed when water is not sprayed, dust is effectively prevented from entering, and blockage is reduced.

Description

Technical Field

[0001] This application relates to the technical field of construction engineering, and specifically to a small ramming device for building foundations. Background Art

[0002] In the field of construction engineering, the ramming quality of the foundation is directly related to the stability and safety of the entire building. To ensure that the foundation reaches the ideal bearing capacity and stability, it is necessary to use an effective ramming device to compact the foundation.

[0003] The Chinese utility model patent with the publication number CN219450699U discloses a building engineering foundation reinforcement device. It atomizes water through a spray device and then bonds with the floating dust to form water droplets and fall, preventing the floating dust from affecting the health of the staff. Although the foundation reinforcement device can achieve dust reduction through the spray device, its spray device sprays water continuously. When used for a dry foundation, continuous water spraying will cause the moisture content of the local soil to exceed the optimal compaction range, resulting in an increase in the pore water pressure between soil particles, thereby weakening the compactness after ramming. In addition, during the contact process between the ramming device and the soil foundation, continuous spraying is carried out, and dust is extremely easy to enter the atomizing nozzle of the spray device along with the air flow. After long-term use, it will gradually accumulate and form a blockage, thereby affecting the subsequent use effect.

[0004] Therefore, this application provides a small ramming device for building foundations to solve the above problems. Summary of the Invention

[0005] This application provides a small ramming device for building foundations, aiming to solve the problems in the background art that although the existing building engineering foundation reinforcement device can reduce dust through a continuous water spraying and atomizing device, when used for a dry foundation, it will cause the moisture content of the local soil to exceed the optimal compaction range and weaken the ramming compactness, and continuous spraying during ramming of soil is likely to cause dust to enter the atomizing nozzle and accumulate and block, affecting the subsequent use effect.

[0006] To achieve the above object, this application provides the following technical solution: A small ramming device for building foundations, including a moving frame, a sleeve fixedly arranged on the moving frame, a ramming hammer penetrating through the bottom of the sleeve and slidably connected in the sleeve, a driving structure arranged on the moving frame and connected to the sleeve for driving the ramming hammer to repeatedly lift and ram the soil, and a spraying structure arranged on the moving frame for dust reduction; The ramming device further includes a spraying pipe fixedly arranged on the moving frame corresponding to one side of the ramming hammer, a water bucket arranged on the driving structure, and a transmission component arranged in the sleeve and connected to the driving structure for spraying the water in the water bucket through the water spraying port on the spraying pipe when the ramming hammer rises; An opening and closing plate is provided at the water spraying opening of the spray pipe, which is used to open the water spraying opening when spraying water or seal it when not spraying water. It is connected to the driving structure through a transmission component. Only when the ramming hammer rises, the transmission component will cause the spray water in the water bucket to be sprayed out through the water spraying opening of the spray pipe. This intermittent spraying method can reduce the problem of excessive soil moisture content during continuous spraying, ensure that the soil is compacted within the optimal compaction range, thereby improving the density after compaction, guaranteeing the bearing capacity and stability of the foundation. At the same time, with the design of the opening and closing plate, when not spraying water, the opening and closing plate can seal the water spraying opening, effectively blocking dust from entering the water spraying opening, reducing the situation of dust clogging the water spraying opening, and can also make the opening and closing plate open when the spray water is sprayed out, allowing the water to spray out smoothly.

[0007] Preferably, in order to realize the repeated lifting and lowering of the ramming hammer, the driving structure includes a box body fixedly installed on the moving frame and fixedly connected to the top of the sleeve, a runner rotatably connected in the box body, a first connecting rod rotatably connected to the runner, a second connecting rod rotatably connected to the end of the first connecting rod far from the runner, a connecting rod sequentially passing through the box body and the sleeve and slidably connected in the box body and the sleeve, a spring fixedly arranged in the sleeve and fixedly sleeved outside the ramming hammer, and a motor fixedly installed on the box body for driving the runner to rotate. The end of the second connecting rod far from the first connecting rod is rotatably connected to one end of the connecting rod, and the end of the connecting rod far from the second connecting rod is fixedly connected to the end of the ramming hammer close to the sleeve. By driving the runner to rotate through the motor, the runner drives the first connecting rod to move, the first connecting rod further drives the second connecting rod to move, and the second connecting rod drives the connecting rod to slide in the box body and the sleeve. Since the connecting rod is fixedly connected to the ramming hammer, the repeated lifting and lowering of the ramming hammer can be realized.

[0008] Preferably, in order to ensure the sealing performance of the connection between the sleeve and the ramming hammer, a telescopic pipe sleeve is sleeved on the end of the ramming hammer far from the sleeve, and both ends of the telescopic pipe sleeve are fixedly connected to the bottom of the sleeve and the outside of the ramming hammer respectively. When the ramming hammer slides in the sleeve, the telescopic pipe sleeve will expand and contract accordingly, always maintaining the seal of the connection between the ramming hammer and the sleeve, effectively preventing dust, sundries, etc. generated during the ramming process from entering the sleeve, avoiding the wear of the internal components of the sleeve by dust, and extending the service life of the equipment. At the same time, it also ensures the sliding of the ramming hammer in the sleeve and improves the reliability of the equipment operation.

[0009] Preferably, in order to realize the installation and use of the water bucket, the water bucket is fixedly arranged on the top of the box body. Fixing the water bucket on the top of the box body not only facilitates the installation and use of the water bucket, but also utilizes the principle of gravity to make the water flow more smoothly into the spray structure under the action of gravity, providing sufficient water supply for subsequent spray operations.

[0010] Preferably, in order to achieve intermittent spraying, the transmission assembly includes a piston assembly disposed in the box body and communicating with the spray pipe and the water bucket at both ends, and a transmission rod fixedly disposed on one side of the connecting rod and connected to the piston assembly, which is used to convey water from the water bucket to the spray pipe when the ramming hammer rises or to pump water from the water bucket for storage when the ramming hammer descends; when the ramming hammer rises, it drives the connecting rod to move upward, and the transmission rod on the connecting rod pushes the piston of the piston assembly upward accordingly, sucking the water in the water bucket into the cylinder through the water inlet pipe, and then conveying it to the spray pipe through the water outlet pipe for spraying. When the ramming hammer descends, the transmission rod drives the piston to move downward, sucking the water from the water bucket into the cylinder for storage. This design realizes the linkage between spraying and the movement of the ramming hammer, eliminating the need for an additional power source to drive the spraying and simplifying the equipment structure.

[0011] Preferably, for the convenience of spraying, pumping and storing water, the piston assembly includes a cylinder fixedly disposed in the box body corresponding to one side of the second connecting rod, a piston slidably connected in the cylinder, a push rod penetrating through the bottom of the cylinder and fixedly connected to both ends of the piston and the end of the transmission rod away from the connecting rod, a water outlet pipe penetrating through the box body and fixedly connected to both ends of the top of the cylinder and the spray pipe, and a water inlet pipe penetrating through the box body and fixedly connected to both ends of one side of the cylinder and the water bucket. The push rod is slidably connected to the cylinder, and the water outlet pipe and the water inlet pipe are both fixedly connected to the box body; when the piston moves towards the direction close to the water outlet pipe, the space in the cylinder decreases, the pressure increases, and the water is squeezed into the spray pipe through the water outlet pipe under the action of the pressure, realizing spraying and ensuring spraying when the ramming hammer rises, improving the dust suppression effect; when the piston moves away from the direction of the water outlet pipe, the space in the cylinder increases, the pressure decreases, forming a negative pressure, ensuring that when the ramming hammer descends, water is automatically sucked into the cylinder for storage for subsequent spraying use.

[0012] Preferably, in order to facilitate the sealing of the opening and closing plate when not spraying water and the opening when spraying water, a hinge shaft is fixedly disposed on one side of the spray pipe corresponding to the water spraying port, a torsion spring is disposed on the hinge shaft, one side of the opening and closing plate is hinged on the hinge shaft, and both ends of the torsion spring are fixedly connected to the hinge shaft and one side of the opening and closing plate respectively; with this design, when the sprayed water jets out from the water spraying port, the impact force of the water flow overcomes the elastic force of the torsion spring, causing the opening and closing plate to open. When not spraying water, the elastic force of the torsion spring causes the opening and closing plate to reset, sealing the water spraying port, thereby realizing the opening of the water spraying port when spraying water and the sealing when not spraying water, effectively preventing dust from entering the water spraying port, reducing the blockage of the water spraying port, and ensuring the normal use of the spraying structure and the dust suppression effect.

[0013] Preferably, in order to further ensure the sealing performance when the opening and closing plate does not spray water, a sealing gasket is fixedly installed on the inner side of the opening and closing plate near the water spraying port of the spray pipe; with the design of the sealing gasket, when the opening and closing plate seals the water spraying port under the action of the torsion spring, the sealing gasket can closely fit the inner wall of the water spraying port, filling the gap between the opening and closing plate and the water spraying port, thereby further enhancing the sealing performance when the opening and closing plate does not spray water and effectively blocking dust from entering the water spraying port.

[0014] The small compaction device for building foundations is connected to the driving structure through a transmission component, and only drives the water in the water bucket to spray out through the water spraying port of the spray pipe when the ramming hammer rises. This intermittent spraying method reduces the local soil moisture content of the dry foundation exceeding the optimal compaction range due to continuous spraying, so as to ensure the compaction density. The small compaction device for building foundations is provided with an opening and closing plate at the water spraying port, which seals when not spraying water, effectively blocking dust from entering and reducing blockage. At the same time, it opens when spraying water to ensure the smooth discharge of the sprayed water.

[0015] Through the design of the torsion spring and the hinge shaft, when the sprayed water sprays out from the water spraying port, the impact force of the water flow overcomes the elastic force of the torsion spring, causing the opening and closing plate to open. When not spraying water, the elastic force of the torsion spring causes the opening and closing plate to reset, sealing the water spraying port. Thus, the water spraying port opens when spraying water and seals when not spraying water, effectively preventing dust from entering the water spraying port, reducing blockage of the water spraying port, and ensuring the normal use of the spraying structure and the dust reduction effect. Through the design of the sealing gasket, when the opening and closing plate seals the water spraying port under the action of the torsion spring, the sealing gasket can closely fit the inner wall of the water spraying port, filling the gap between the opening and closing plate and the water spraying port, thereby further enhancing the sealing performance when the opening and closing plate does not spray water and effectively blocking dust from entering the water spraying port. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a small compaction device for building foundations in Embodiment 1; Figure 2 It is a schematic cross-sectional structural diagram of a small compaction device for building foundations in Embodiment 1; Figure 3 It is a schematic cross-sectional structural diagram of the piston assembly in Embodiment 1; Figure 4 It is a schematic structural diagram of the spray pipe in Embodiment 1; Figure 5 It is a schematic structural diagram of the hinge shaft and the torsion spring in Embodiment 1; Figure 6 It is a schematic structural diagram of the opening and closing plate in Embodiment 2.

[0017] In the figure: 1. Moving frame; 2. Sleeve 3. Tamping hammer; 31. Telescopic sleeve 4. Driving structure; 41. Box body; 42. Runner; 43. First connecting rod; 44. Second connecting rod; 45. Connecting rod; 46. Motor; 47. Spring 5. Spraying structure; 51. Spraying pipe; 511. Water spraying orifice; 512. Hinge shaft; 513. Torsion spring; 52. Transmission assembly; 521. Piston assembly; 5211. Cylinder body; 5212. Piston; 5213. Push rod; 5214. Water outlet pipe; 5215. Water inlet pipe; 522. Transmission rod; 53. Water bucket 6. Opening and closing plate; 61. Sealing gasket Specific implementation manner

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] Embodiment 1 This embodiment provides a small tamping device for building foundations, as Figures 1 - 5 shown. The tamping device includes a moving frame 1, a sleeve 2 fixedly arranged on the moving frame 1, a tamping hammer 3 penetrating through the bottom of the sleeve 2 and slidably connected inside the sleeve 2, a driving structure 4 arranged on the moving frame 1 and connected to the sleeve 2 for driving the tamping hammer 3 to repeatedly lift and lower for tamping soil, and a spraying structure 5 arranged on the moving frame 1 for dust reduction; the tamping device further includes a spraying pipe 51 fixedly arranged on the moving frame 1 corresponding to one side of the tamping hammer 3, a water bucket 53 arranged on the driving structure 4, and a transmission assembly 52 arranged inside the sleeve 2 and connected to the driving structure 4 for enabling the sprayed water in the water bucket 53 to be sprayed out through the water spraying orifice 511 on the spraying pipe 51 when the tamping hammer 3 rises; an opening and closing plate 6 for opening the water spraying orifice 511 when spraying water or sealing when not spraying water is arranged at the water spraying orifice 511 on the spraying pipe 51.

[0020] It should be noted that moving wheels for moving are fixedly arranged around the bottom of the moving frame 1, so that the device can be flexibly moved to different construction positions.

[0021] During use, the movable frame 1 can be flexibly moved to different construction positions by moving it, and the driving structure 4 is started to drive the ramming hammer 3 to repeatedly lift and lower in the sleeve 2 to perform ramming operation on the foundation. However, when the ramming hammer 3 rises, the spray water stored in the water bucket 53 can be conveyed into the spray pipe 51 through the transmission assembly 52 and finally sprayed out from the water spray port 511 to wet the soil before ramming to achieve dust reduction. At this time, with the spraying of the spray water at the water spray port 511, the water flow will impact the opening and closing plate 6 to open the opening and closing plate 6 to achieve water spraying. When the ramming hammer 3 descends for ramming and no spray water is conveyed through the transmission assembly 52 for spraying, the opening and closing plate 6 will seal the water spray port 511 to prevent dust from entering the water spray port 511 and causing blockage.

[0022] Specifically, the driving structure 4 includes a box body 41 fixedly installed on the movable frame 1 and fixedly connected to the top of the sleeve 2, a runner 42 rotatably connected in the box body 41, a first connecting rod 43 rotatably connected to the runner 42, a second connecting rod 44 rotatably connected to the end of the first connecting rod 43 away from the runner 42, a connecting rod 45 sequentially passing through the box body 41 and the sleeve 2 and slidably connected in the box body 41 and the sleeve 2, a spring 47 fixedly arranged in the sleeve 2 and fixedly sleeved outside the ramming hammer 3, and a motor 46 fixedly installed on the box body 41 for driving the runner 42 to rotate. The end of the second connecting rod 44 away from the first connecting rod 43 is rotatably connected to one end of the connecting rod 45, and the end of the connecting rod 45 away from the second connecting rod 44 is fixedly connected to the end of the ramming hammer 3 close to the sleeve 2; When ramming operation needs to be performed, the motor 46 is started. At this time, the motor 46 will drive the runner 42 rotatably connected in the box body 41 to rotate. When the runner 42 rotates, the first connecting rod 43 rotatably connected thereto will move accordingly. Since the end of the first connecting rod 43 away from the runner 42 is rotatably connected to the second connecting rod 44, the movement of the first connecting rod 43 will drive the second connecting rod 44 to move. And the end of the second connecting rod 44 away from the first connecting rod 43 is rotatably connected to one end of the connecting rod 45 sequentially passing through the box body 41 and the sleeve 2 and slidably connected therein. In this way, the movement of the second connecting rod 44 will further drive the connecting rod 45 to slide up and down in the box body 41 and the sleeve 2. Also, since the end of the connecting rod 45 away from the second connecting rod 44 is fixedly connected to the end of the ramming hammer 3 close to the sleeve 2, when the connecting rod 45 slides upward, the connecting rod 45 will pull the ramming hammer 3 to rise together. At this time, the spring 47 fixedly sleeved outside the ramming hammer 3 and arranged in the sleeve 2 is compressed and stores elastic potential energy. When the connecting rod 45 slides downward, the spring 47 releases the previously stored elastic potential energy, generating a downward thrust on the ramming hammer 3 to assist the ramming hammer 3 to accelerate and fall, so that the ramming hammer 3 rams the foundation with a greater impact force. As the motor 46 continues to operate, the runner 42 continuously rotates, driving the first connecting rod 43, the second connecting rod 44 and the connecting rod 45 to continuously move, and further causing the ramming hammer 3 to repeatedly lift and lower in the sleeve 2 to continuously ram the foundation, realizing the ramming function of the device.

[0023] Among them, in order to ensure the sealing performance of the connection between the sleeve 2 and the ramming hammer 3, a telescopic pipe sleeve 31 is sleeved on one end of the ramming hammer 3 away from the sleeve 2. Both ends of the telescopic pipe sleeve 31 are fixedly connected to the bottom of the sleeve 2 and the outer side of the ramming hammer 3 respectively; when the ramming hammer 3 slides in the sleeve 2, the telescopic pipe sleeve 31 will expand and contract accordingly, always maintaining the seal at the connection between the ramming hammer 3 and the sleeve 2, effectively preventing dust, debris, etc. generated during the ramming process from entering the sleeve 2, avoiding the wear of the internal components of the sleeve 2 by dust, extending the service life of the equipment, and at the same time ensuring the sliding of the ramming hammer 3 in the sleeve 2, improving the reliability of the equipment operation.

[0024] In addition, in order to realize the installation and use of the water bucket 53, the water bucket 53 is fixedly arranged on the top of the box body 41; fixing the water bucket 53 on the top of the box body 41 not only facilitates the installation and use of the water bucket 53, but also utilizes the principle of gravity to make the water flow more smoothly to the spraying structure 5 under the action of gravity, providing sufficient water supply for the subsequent spraying operation.

[0025] Furthermore, the transmission assembly 52 includes a piston assembly 521 arranged in the box body 41 and communicating with the spray pipe 51 and the water bucket 53 at both ends respectively, and a transmission rod 522 fixedly arranged on one side of the connecting rod 45 and connected to the piston assembly 521, which is used to convey water from the piston assembly 521 to the spray pipe 51 when the ramming hammer 3 rises or to pump water from the water bucket 53 for storage when the ramming hammer 3 descends; the piston assembly 521 includes a cylinder body 5211 fixedly arranged in the box body 41 corresponding to one side of the second connecting rod 44, a piston 5212 slidably connected in the cylinder body 5211, a push rod 5213 passing through the bottom of the cylinder body 5211 and fixedly connected to both ends of the piston 5212 and the end of the transmission rod 522 away from the connecting rod 45 respectively, a water outlet pipe 5214 passing through the box body 41 and fixedly connected to the top end of the cylinder body 5211 and the spray pipe 51 respectively, and a water inlet pipe 5215 passing through the box body 41 and fixedly connected to one side of the cylinder body 5211 and the water bucket 53 respectively. The push rod 5213 is slidably connected to the cylinder body 5211, and both the water outlet pipe 5214 and the water inlet pipe 5215 are fixedly connected to the box body 41; In the initial state, a certain amount of spray water is stored in the cylinder body 5211. When the ramming hammer 3 rises, the transmission rod 522 fixedly connected to one side of the connecting rod 45 moves accordingly. Since the end of the transmission rod 522 far from the connecting rod 45 is fixedly connected to the push rod 5213 of the piston assembly 521, and the push rod 5213 is slidably connected to the bottom of the cylinder body 5211 fixedly arranged on one side of the corresponding connecting rod two 44 in the box body 41, and the piston 5212 is slidably connected in the cylinder body 5211 and fixedly connected to the push rod 5213, the transmission rod 522 will push the push rod 5213 to drive the piston 5212 to move in the cylinder body 5211 towards the direction close to the water outlet pipe 5214. At this time, the space in the cylinder body 5211 decreases and the pressure increases. Thus, the spray water stored in the cylinder body 5211 will be compressed and conveyed to the spray pipe 51 through the water outlet pipe 5214, and finally sprayed out through the water spraying ports 511 on the spray pipe 51 to wet the soil before ramming the soil, achieving dust reduction. When the ramming hammer 3 descends, the connecting rod 45 drives the transmission rod 522 to move in the reverse direction, and further enables the push rod 5213 to drive the piston 5212 to move in the cylinder body 5211 towards the direction away from the water outlet pipe 5214. At this time, the space in the cylinder body 5211 increases and the pressure decreases to form a negative pressure. Under the action of the negative pressure, the water in the water bucket 53 will be sucked into the cylinder body 5211 through the water inlet pipe 5215 for storage, so as to be conveyed into the spray pipe 51 again for use when the ramming hammer 3 rises next time.

[0026] Furthermore, on one side of the spray pipe 51 corresponding to the water spraying port 511, a hinge shaft 512 is fixedly arranged, and a torsion spring 513 is arranged on the hinge shaft 512. One side of the opening and closing plate 6 is hinged on the hinge shaft 512, and both ends of the torsion spring 513 are fixedly connected to the hinge shaft 512 and one side of the opening and closing plate 6 respectively; When water is conveyed into the spray pipe 51 through the water outlet pipe 5214, with the influx of water flow, the water flow generates an impact force on the opening and closing plate 6. Since one side of the opening and closing plate 6 is hinged on the hinge shaft 512, under the action of the water flow impact force, the opening and closing plate 6 will rotate around the hinge shaft 512. At this time, the torsion spring 513 is elastically deformed by the rotation of the opening and closing plate 6 and stores elastic potential energy. After the opening and closing plate 6 rotates, the water spraying port 511 is opened, and the water is sprayed out from the water spraying port 511 for dust reduction operation. When the ramming hammer 3 descends, the transmission assembly 52 stops conveying water to the spray pipe 51. At this time, there is no water flow impacting the opening and closing plate 6, and the elastic potential energy stored in the torsion spring 513 begins to be released, generating an elastic force to restore its original shape. This elastic force acts on the opening and closing plate 6, causing the opening and closing plate 6 to rotate in the reverse direction around the hinge shaft 512 until the opening and closing plate 6 closely fits at the water spraying port 511, realizing the sealing of the water spraying port 511, preventing dust and other impurities from entering the water spraying port 511 and causing blockage, ensuring that the spray pipe 51 can spray water normally later, and ensuring the stable operation of the dust reduction function of the device.

[0027] Embodiment 2 Different from Embodiment 1, as Figure 6As shown in the figure, in order to further ensure the sealing performance when the opening and closing plate 6 does not spray water, a sealing gasket 61 is fixedly installed on the inner side of the opening and closing plate 6 close to the water spray port 511 inside the spray pipe 51; due to the design of the sealing gasket 61, when the opening and closing plate 6 seals the water spray port 511 under the action of the torsion spring 513, the sealing gasket 61 can closely fit the inner wall of the water spray port 511, filling the gap between the opening and closing plate 6 and the water spray port 511, thereby further enhancing the sealing performance when the opening and closing plate 6 does not spray water and effectively preventing dust from entering the water spray port 511.

[0028] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, making equivalent replacements or changes should be covered within the protection scope of the present application.

Claims

1. A small ramming device for building foundations, comprising a moving frame (1), a sleeve (2) fixedly arranged on the moving frame (1), a ramming hammer (3) penetrating through the bottom of the sleeve (2) and slidably connected within the sleeve (2), a driving structure (4) arranged on the moving frame (1) and connected to the sleeve (2) for driving the ramming hammer (3) to repeatedly lift and lower for ramming the soil, and a spraying structure (5) arranged on the moving frame (1) for dust reduction; It is characterized in that: The ramming device further comprises a spray pipe (51) fixedly arranged on the moving frame (1) corresponding to one side of the ramming hammer (3), a water bucket (53) arranged on the driving structure (4), and a transmission component (52) arranged within the sleeve (2) and connected to the driving structure (4) for spraying the water in the water bucket (53) through a water spraying port (511) on the spray pipe (51) when the ramming hammer (3) ascends; A switching plate (6) for opening the water spraying port (511) during water spraying or sealing it when not spraying is arranged at the water spraying port (511) of the spray pipe (51).

2. The small ramming device for building foundation according to claim 1, characterized in that: The driving structure (4) comprises a box body (41) fixedly installed on the moving frame (1) and fixedly connected to the top of the sleeve (2), a runner (42) rotatably connected within the box body (41), a first connecting rod (43) rotatably connected to the runner (42), a second connecting rod (44) rotatably connected to the end of the first connecting rod (43) far from the runner (42), a connecting rod (45) sequentially penetrating through the box body (41) and the sleeve (2) and slidably connected within the box body (41) and the sleeve (2), a spring (47) fixedly arranged within the sleeve (2) and fixedly sleeved outside the ramming hammer (3), and a motor (46) fixedly installed on the box body (41) for driving the runner (42) to rotate. The end of the second connecting rod (44) far from the first connecting rod (43) is rotatably connected to one end of the connecting rod (45), and the end of the connecting rod (45) far from the second connecting rod (44) is fixedly connected to the end of the ramming hammer (3) close to the sleeve (2).

3. The small ramming device for building foundation according to claim 2, characterized in that: A telescopic pipe sleeve (31) is sleeved on the end of the ramming hammer (3) far from the sleeve (2), and both ends of the telescopic pipe sleeve (31) are fixedly connected to the bottom of the sleeve (2) and the outside of the ramming hammer (3).

4. The small ramming device for building foundation according to claim 2, characterized in that: The water bucket (53) is fixedly arranged on the top of the box body (41).

5. The small ramming device for building foundation according to claim 4, characterized in that: The transmission component (52) comprises a piston component (521) arranged within the box body (41) and communicating with the spray pipe (51) and the water bucket (53) at both ends, and a transmission rod (522) fixedly arranged on one side of the connecting rod (45) and connected to the piston component (521) for delivering water from the piston component (521) to the spray pipe (51) when the ramming hammer (3) ascends or sucking water from the water bucket (53) for storage when the ramming hammer (3) descends.

6. The small ramming device for building foundation according to claim 5, characterized in that: The piston assembly (521) includes a cylinder body (5211) fixedly arranged inside the box body (41) on one side corresponding to the second connecting rod (44), a piston (5212) slidably connected inside the cylinder body (5211), a push rod (5213) passing through the bottom of the cylinder body (5211) and fixedly connected to the piston (5212) and one end of the transmission rod (522) far from the connecting rod (45) at both ends, a water outlet pipe (5214) passing through the box body (41) and fixedly connected to the top end of the cylinder body (5211) and the spray pipe (51) at both ends, and a water inlet pipe (5215) passing through the box body (41) and fixedly connected to one side of the cylinder body (5211) and the water bucket (53) at both ends. The push rod (5213) is slidably connected to the cylinder body (5211), and the water outlet pipe (5214) and the water inlet pipe (5215) are both fixedly connected to the box body (41).

7. The small ramming device for building foundations according to claim 1, characterized in that: On one side of the spray pipe (51) corresponding to the water spray opening (511), a hinge shaft (512) is fixedly arranged. A torsion spring (513) is arranged on the hinge shaft (512). One side of the opening and closing plate (6) is hinged on the hinge shaft (512). Both ends of the torsion spring (513) are fixedly connected to the hinge shaft (512) and one side of the opening and closing plate (6) respectively.

8. The small ramming device for building foundation according to claim 7, characterized in that: A sealing gasket (61) is fixedly installed on one side of the opening and closing plate (6) close to the inside of the water spray opening (511) on the spray pipe (51).

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