A mobile soil removal device for the inner wall of a foundation pit

Abstract

This invention provides a mobile soil extraction device for the inner wall of a foundation pit, applicable to the field of construction equipment. It includes a rotating soil extraction frame, comprising a rotating column and multiple mobile soil extraction heads mounted around the rotating column. Each mobile soil extraction head includes a positioning shell and an excavating frame located inside the positioning shell. The positioning shell positions the excavating frame on the soil. The excavating frame excavates the soil via its included rotating excavating frame. The rotating excavating frame includes an excavating chain frame and a positioning component, with the excavating chain frame located outside the positioning component. The excavating chain frame includes two closed-loop chains and multiple excavating buckets positioned between the two chains. This device enables real-time soil transfer and extraction during soil excavation, ensuring efficient connection between soil excavation and transfer, thus facilitating efficient foundation pit excavation.

Description

Technical Field

[0001] This invention relates to the field of construction equipment, and more particularly to a mobile soil extraction device for the inner wall of a foundation pit. Background Technology

[0002] Earthwork excavation is a fundamental operation in civil engineering, referring to the excavation of earth and rock from a designated area during construction for purposes such as roadbed filling, foundation treatment, and site leveling. In foundation pit excavation, the foundation pit is a temporary excavation space, typically ≥5 meters deep, and excavation must be coordinated with the construction of the support structure (such as piles, diaphragm walls, and internal bracing). Earthwork excavation directly affects the stability of the foundation pit, requiring layered, segmented, and symmetrical excavation, and over-excavation or undercutting is strictly prohibited.

[0003] In foundation pit excavation, hydraulic excavators such as ordinary excavators, long-arm excavators, and grab excavators are generally used for excavation first, and then dump trucks, dump trucks, or belt conveyors are used for transportation. Due to the influence of the internal structure of the foundation pit, the connection between excavating and transporting soil is often not efficient enough, resulting in low foundation pit excavation efficiency. For example, the existing technology of a soil lifting and transportation device (application number 202111498505.1) discloses that "the cutting ring and the side sealing cylinder are used to insert the cutting ring into the soil, and then the bottom of the cutting ring is sealed by the fan-shaped bottom plate as the control mechanism is lifted, thereby confining the soil in it, and then the transfer is completed." However, it requires the "control mechanism" to periodically insert the "cutting ring and the side sealing cylinder" into the foundation pit to transport the soil out.

[0004] Therefore, a movable soil removal device for the inner wall of the foundation pit is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a mobile soil removal device for the inner wall of a foundation pit, aiming to solve the problems in the prior art.

[0006] Specifically: A mobile soil extraction device for the inner wall of a foundation pit includes a storage tank mounted on a robotic arm, a rotating tank rotatably mounted at the bottom of the storage tank, and a rotating soil extraction frame mounted on the rotating tank. The rotating soil extraction frame includes a rotating column and multiple movable soil extraction heads mounted around the rotating column. Each movable soil extraction head includes a positioning shell and a digging frame located inside the positioning shell. The positioning shell is used to position the digging frame on the soil. The digging frame excavates the soil through its included rotating digging frame. The rotating digging frame includes a digging chain frame and a positioning component. The digging chain frame is located outside the positioning component. The digging chain frame includes two closed-loop chains and multiple digging buckets mounted between the two chains. During the closed-loop sequential movement of the multiple digging buckets driven by the closed-loop chains, the soil is excavated, and the excavated soil is transferred to the rotating tank through the positioning shell.

[0007] A robotic arm places the storage tank, rotating tank, and rotating excavator into the foundation pit. After rotating, the rotating excavator uses multiple moving excavation heads to act sequentially on the inner wall of the pit. The moving excavation heads are positioned stably on the soil by a positioning shell. The rotating excavator then activates two chains on the excavation chain frame, using the two chains to drive multiple excavation buckets in a closed loop. After excavating the soil, the excavation buckets continue to follow the chains into the positioning shell and are then transferred to the rotating tank. The positioning component ensures the stability of the excavation buckets during soil excavation. This system enables real-time soil transfer and excavation during the soil excavation process, ensuring efficient connection between soil excavation and transfer, which is beneficial for efficient foundation pit excavation.

[0008] The technical solution of this application will be further described below:

[0009] In one embodiment, the positioning shell includes a guide cylinder and a telescopic support arm. One end of the telescopic support arm is attached to the guide cylinder, and the other end is attached to a rotating column. A guide hose is connected to the guide cylinder, and the guide hose communicates with the guide cylinder. A material conveying auger is installed through the guide hose along its main body direction, and the material conveying angle of the auger is controlled by an electric telescopic rod. The end of the guide hose away from the guide cylinder is connected to a rotating tank. The end of the excavating chain frame is inserted inside the guide cylinder, and a drive motor is installed outside the guide cylinder. A rotating shaft is fixed on the output shaft of the drive motor, and multiple sprockets are fixed on the rotating shaft. The multiple sprockets are used to apply power to the excavating chain frame and drive the chain to rotate in a closed loop.

[0010] Furthermore, the mobile excavator also includes a sealing shell, which covers the outside of the excavating frame. The sealing shell includes a front cover and two side baffles. The two side baffles are located on both sides of the excavating chain frame, and the front cover is placed at the end of the excavating chain frame. The front cover and the two side baffles are detachably connected. When the rotating excavator enters the foundation pit, the radius of rotation of the mobile excavator can be adjusted by extending and retracting the telescopic support arm, thereby gradually and rapidly excavating the radius of the foundation pit. After removing the front cover, the end of the excavating chain frame is exposed, and the rotating excavator is pushed forward by the robotic arm to achieve the desired depth of excavation. Thus, the rotating excavator, in conjunction with the extension and retraction of the telescopic support arm, can rapidly excavate foundation pits of various sizes from all directions while ensuring real-time soil transfer, achieving efficient connection from soil excavation to soil transfer.

[0011] In one embodiment, the excavating frame further includes two side mounting plates distributed on both sides of the excavating rotating frame. The side mounting plates are used to limit and shape the path of the chain during closed-loop sequential movement.

[0012] In one embodiment, the excavator bucket includes an excavator bucket body, a support base, and a pusher plate. The support base is mounted between two chains. A through slot is provided on the support base, and the excavator bucket body is movably inserted into the through slot. The pusher plate is disposed on the support base.

[0013] Furthermore, the excavator bucket is U-shaped, and a drag plate is installed at the bottom of the excavator bucket. A cylinder telescopic rod is fixed on the drag plate, and the end of the cylinder telescopic rod away from the drag plate is fixed to the support base.

[0014] Furthermore, a placement cavity is provided on the support base, and the size of the pusher plate matches that of the placement cavity. The placement cavity is used to place the pusher plate. A cylinder telescopic rod 2 is installed between the placement cavity and the pusher plate. The cylinder telescopic rod 2 is used to control the position of the pusher plate inside the excavator bucket.

[0015] As the excavator bucket moves the soil into the positioning shell, the second cylinder extension rod pushes the pusher plate outward, simultaneously retracting the excavator bucket to the bottom of the support, allowing the soil to be quickly discharged for rapid transfer. Simultaneously, as the pusher plate and excavator bucket move in opposite directions, the pusher plate quickly scrapes away soil from the inner surface of the excavator bucket. During the excavator bucket's insertion into the soil, the second cylinder extension rod compresses and shapes the soil, increasing its compactness and preventing loose soil from spilling out during transfer.

[0016] In one embodiment, the positioning component includes a guide block with a guide groove. A drive chain is installed inside the guide groove, and the drive chain can move in a closed loop along the smooth inner wall of the guide groove. Multiple positioning rods are slidably mounted on the guide groove. The drive chain includes multiple chain links, each corresponding to one of the positioning rods. The positioning rods are fixed to the chain links, with the end of the positioning rod furthest from the chain link fixed to the bottom of the digging bucket. Multiple digging buckets correspond one-to-one with the multiple positioning rods. During the synchronous driving of the drive chain by the drive motor and the closed-loop movement of the chain, the positioning rods are kept synchronously positioned between the digging bucket and the guide block. When the digging bucket acts on the soil, the soil exerts a reaction force on the digging bucket. Because the positioning rods are synchronously positioned between the digging bucket and the guide block, the positioning rods provide a limiting force to the digging bucket, ensuring stable digging and soil transfer during the flexible closed-loop operation.

[0017] As another embodiment of the "digging bucket" and "positioning component", this application provides that the positioning component includes a guide block and a water tank. The water tank is installed on the side wall of the guide block and embedded inside the guide block. A water guide slit is provided on the outside of the water tank, communicating with the inside of the water tank. A limiting groove is provided on each of the two side walls of the water guide slidably. A sealing rubber strip is slidably fitted inside the water guide slit, the sealing rubber strip being a closed loop connected end to end, and the sealing rubber strip is slidably fitted inside the limiting groove. A limiting flange is fixed to one side of the sealing rubber strip inside the limiting groove, and the limiting flange is formed by... To prevent the sealing rubber strip from falling off from the limiting groove; the sealing rubber strip is equipped with multiple water guide pipes, which are connected to the water tank; the guide block has a guide groove, and a drive chain is installed inside the guide groove. The drive chain can move in a closed loop along the smooth inner wall of the guide groove; multiple positioning rods are slidably mounted on the guide groove; the drive chain includes multiple chain links, and the multiple chain links correspond one-to-one with the multiple positioning rods; the positioning rods are fixed on the chain links, and the end of the positioning rod away from the chain link is fixed to the bottom of the excavator bucket, and the multiple excavators correspond one-to-one with the multiple positioning rods.

[0018] The excavating bucket includes an excavating bucket body, a supporting base, and a pusher plate. The supporting base is mounted between two chains. The pusher plate is mounted on the supporting base. Multiple cutting plates are fixed at the opening at the top of the excavating bucket body. Multiple water guides are provided on the cutting plates. All water guides are connected to a water guide cavity one inside the cutting plates. Water guide cavity one is connected to a water guide cavity two inside the excavating bucket body. Multiple excavating buckets correspond one-to-one with multiple water guide pipes. A water guide connecting pipe is connected to the excavating bucket body. The water guide connecting pipe is used to connect water guide cavity two and water guide pipes.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] A robotic arm places the storage tank, rotating tank, and rotating excavator into the foundation pit. After rotating, the rotating excavator uses multiple moving excavation heads to act sequentially on the inner wall of the pit. The moving excavation heads are positioned stably on the soil by a positioning shell. The rotating excavator then activates two chains on the excavation chain frame, using the two chains to drive multiple excavation buckets in a closed loop. After excavating the soil, the excavation buckets continue to follow the chains into the positioning shell and are then transferred to the rotating tank. The positioning component ensures the stability of the excavation buckets during soil excavation. This system enables real-time soil transfer and excavation during the soil excavation process, ensuring efficient connection between soil excavation and transfer, which is beneficial for efficient foundation pit excavation.

[0021] Once the rotating excavator enters the foundation pit, the radius of the rotating excavator head can be adjusted by extending and retracting the telescopic support arm, allowing for the gradual and rapid excavation of the foundation pit's radius. After removing the front casing, the end of the excavation chain frame is exposed, and the rotating excavator is propelled forward by the robotic arm to achieve the desired excavation depth. This allows the rotating excavator to excavate foundation pits of various sizes rapidly and comprehensively, while also ensuring real-time soil transfer and achieving efficient coordination between soil excavation and soil transfer.

[0022] When the excavator bucket comes into contact with the soil, the cylinder telescopic rod pushes the excavator bucket body further out of the support base, causing the excavator bucket body to quickly penetrate into the soil and improve the efficiency of shoveling soil. When the excavator bucket body carries the soil to the inside of the positioning shell, the cylinder telescopic rod retracts the excavator bucket body to the bottom of the support base, and the soil is exposed to the outside, improving the efficiency of soil transfer. In conjunction with the material conveying auger controlled by the electric telescopic rod, the soil is quickly transferred into the rotating tank.

[0023] When the excavator bucket carries the soil into the positioning shell, the cylinder telescopic rod 2 drives the pusher plate to push outward, which in turn retracts the excavator bucket to the bottom of the support, so that the soil can be quickly exposed and transported. At the same time, after the pusher plate and the excavator bucket move in opposite directions, the pusher plate can quickly scrape off the soil on the inner surface of the excavator bucket.

[0024] As the excavator bucket penetrates the soil, the cylinder extension rod 2 drives the pusher plate to compress and shape the soil, increasing its compactness and preventing loose soil from spilling out during transport.

[0025] During the synchronous driving of the drive chain by the drive motor and the closed-loop circulation of the chain, the positioning rod is kept synchronously between the digging bucket and the guide block. When the digging bucket acts on the soil, the soil will exert a reaction force on the digging bucket. Since the positioning rod is synchronously between the digging bucket and the guide block, the positioning rod will exert a limiting force on the digging bucket, so as to ensure the stability of the digging bucket in digging and the stability of the soil transfer during the flexible closed-loop circulation operation.

[0026] When the excavator bucket reaches the soil, multiple cutting plates can be used to cut into the soil to break up hard soil layers, so that the excavator bucket can enter the soil accurately and quickly, avoiding the situation where the excavator bucket cannot enter the soil and thus digs empty.

[0027] During the process of multiple cutting plates cutting into the soil, multiple water inlets are used to add water to the soil in sequence to regulate the soil moisture. In addition, the cutting of multiple cutting plates facilitates the efficient transfer of soil between different components in the subsequent process. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of a mobile soil extraction device for the inner wall of a foundation pit in one embodiment of the present invention.

[0030] Figure 2 This is a demonstration diagram of the present invention for advancing and excavating soil in the foundation pit (Note: A is a cross-sectional view when advancing in the foundation pit; B is a top view when advancing in the foundation pit).

[0031] Figure 3 This is a demonstration diagram of the present invention, showing the process of expanding soil extraction outwards from the foundation pit in all directions.

[0032] Figure 4 for Figure 1 Schematic diagram of the rotating soil-retrieving frame;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure of the China Mobile soil extraction head;

[0034] Figure 6 for Figure 5 Schematic diagram of the central positioning shell;

[0035] Figure 7 for Figure 5 Schematic diagram of the middle sealing shell;

[0036] Figure 8 for Figure 5 Schematic diagram of the structure of the central excavator frame;

[0037] Figure 9 for Figure 8 A cross-sectional structural diagram of the central excavator frame;

[0038] Figure 10 for Figure 9 A schematic diagram of the positioning component;

[0039] Figure 11 for Figure 9 Schematic diagram of the structure of the excavation chain frame;

[0040] Figure 12 for Figure 11 Schematic diagram of the structure of the excavator bucket;

[0041] Figure 13 for Figure 12 Exploded view of the excavator bucket;

[0042] Figure 14 for Figure 12 Schematic diagram of the structure of the excavator bucket;

[0043] Figure 15 for Figure 12 Schematic diagram of the structure of the central support base;

[0044] Figure 16 for Figure 11 Left view of the excavator bucket;

[0045] Figure 17 for Figure 9 A schematic diagram of the positioning component in another embodiment;

[0046] Figure 18 for Figure 11 A schematic diagram of the excavator bucket in another embodiment;

[0047] In the attached diagram:

[0048] 1. Storage tank; 2. Rotary tank; 3. Rotary soil-boring frame; 4. Foundation pit; 5. Rotary column; 6. Moving soil-boring head.

[0049] 100. Positioning shell; 200. Excavator frame; 300. Sealing shell;

[0050] 110. Drive motor; 120. Material guide hose; 130. Material guide cylinder; 140. Telescopic support arm;

[0051] 210. Side mounting plate; 220. Excavating rotating frame; 221. Excavating chain frame; 222. Positioning component; 223. Chain; 224. Excavating bucket; 225. Excavating bucket body; 226. Support base; 227. Push plate; 228. Reaction force indicator direction; 229. Limiting force indicator direction; 230. Water guide connecting pipe; 231. Cutting plate; 232. Water guide port; 2221. Positioning rod; 2222. Mounting hole; 2223. Guide groove; 2224. Guide block; 2225. Sealing rubber strip; 2226. Water tank; 2227. Water guide pipe; 2251. Slide plate; 2252. Cylinder telescopic rod one; 2261. Through slot; 2262. Placement cavity; 2263. Cylinder telescopic rod two;

[0052] 310. Side baffle; 320. Front cover. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The specific implementation of the invention will be described in detail below with reference to specific embodiments.

[0054] like Figure 1 and Figure 4As shown: A mobile soil removal device for the inner wall of a foundation pit includes a storage tank 1 mounted on a robotic arm, a rotating tank 2 rotatably mounted at the bottom of the storage tank 1, a rotating soil removal frame 3 mounted on the rotating tank 2, the rotating soil removal frame 3 including a rotating column 5, and multiple mobile soil removal heads 6 mounted around the rotating column 5.

[0055] It should be noted that: the robotic arm is existing technology, such as the robotic arm of a long-arm excavator. Its detailed structure can be found in existing literature and journals, and it can also be purchased directly on the market, or assembled from parts purchased on the market, etc.; it is not what this invention is meant to protect, and will not be described in detail here, nor is it shown in the accompanying drawings.

[0056] The driving force for the rotation of the rotating tank 2 and the rotating soil-retrieving frame 3 relative to the storage tank 1 can be driven by a motor in conjunction with gears and racks, which is also existing technology and is not protected by this invention. It will not be described in detail here, nor is it shown in the accompanying drawings.

[0057] Continue reading Figure 5 , Figure 8 , Figure 9 and Figure 11 The mobile soil-collecting head 6 includes a positioning shell 100 and a soil-digging frame 200 located inside the positioning shell 100. The positioning shell 100 is used to position the soil-digging frame 200 on the soil. The soil-digging frame 200 excavates the soil through its included soil-digging rotating frame 220.

[0058] The digging rotating frame 220 includes a digging chain frame 221 and a positioning component 222. The digging chain frame 221 is located outside the positioning component 222. The digging chain frame 221 includes two closed-loop chains 223 and a plurality of digging buckets 224 mounted between the two chains 223.

[0059] It should be noted that: the multiple digging buckets 224 correspond one-to-one with the multiple chain links 1 on the chain 223; the digging buckets 224 are mounted on the chain links 1; the chain links 1 and the chain 223 are both existing technologies, and their detailed structures can be found in existing literature and journals, and can also be purchased directly on the market, or assembled from components purchased on the market, etc.; they are not what this invention is intended to protect, and will not be described in detail here.

[0060] During the closed-loop sequential movement of multiple excavating buckets 224 driven by the chain 223, the soil is excavated and the excavated soil is transferred to the rotating tank 2 through the positioning shell 100.

[0061] Therefore, in response to the situation where the process from excavating soil to transporting soil is often not efficiently coordinated due to the internal structure of foundation pit 4, resulting in low excavation efficiency of foundation pit 4, this application can achieve the following:

[0062] The storage tank 1, rotating tank 2, and rotating soil-collecting frame 3 are placed into the foundation pit 4 by a robotic arm. After rotating, the rotating soil-collecting frame 3 will act on the inner wall of the foundation pit 4 in sequence through multiple moving soil-collecting heads 6. The moving soil-collecting heads 6 stabilize the excavation frame 200 on the soil through the positioning shell 100. The excavation rotating frame 220 starts the two chains 223 on the excavation chain frame 221, and completes the closed-loop driving of multiple excavation buckets 224 to move in a closed loop. After the excavation buckets 224 have excavated the soil, they will continue to follow the chains 223 into the positioning shell 100 and then be transferred to the rotating tank 2. The positioning component 222 is used to ensure the stability of the excavation buckets 224 in the soil. This realizes the real-time transfer of soil and soil collection during the soil excavation process, ensuring efficient connection from soil excavation to soil transfer, which is conducive to efficient excavation of the foundation pit 4.

[0063] With the rotating tank 2 and the storage tank 1 connected, and the storage tank 1 having a single opening, the belt conveyor can be lowered into the storage tank 1 for secondary soil transfer.

[0064] like Figure 5 and Figure 6 As shown: The positioning shell 100 includes a guide cylinder 130 and a telescopic support arm 140. One end of the telescopic support arm 140 is attached to the guide cylinder 130, and the other end is attached to the rotating column 5.

[0065] A guide hose 120 is connected to the guide cylinder 130, and the guide hose 120 is connected to the guide cylinder 130; a material conveying auger is installed through the main body direction inside the guide hose 120, and the material conveying angle of the material conveying auger is controlled by an electric telescopic rod; the end of the guide hose 120 away from the guide cylinder 130 is connected to the rotating tank 2.

[0066] The end of the digging chain frame 221 is inserted inside the guide cylinder 130. A drive motor 110 is installed outside the guide cylinder 130. A rotating shaft is fixed on the output shaft of the drive motor 110. Multiple sprockets are fixed on the rotating shaft. The multiple sprockets are used to apply power to the digging chain frame 221 and drive the chain 223 to rotate in a closed loop.

[0067] Furthermore, such as Figures 5-7 As shown: The movable soil-collecting head 6 also includes a sealing shell 300, which covers the outside of the excavation frame 200;

[0068] The sealing shell 300 includes a front cover 320 and two side baffles 310. The two side baffles 310 are located on both sides of the excavation chain frame 221, and the front cover 320 covers the end of the excavation chain frame 221. The front cover 320 is detachably connected to the two side baffles 310.

[0069] Combined Figure 2 and Figure 3 As the rotating soil-removing frame 3 enters the foundation pit 4, the radius of rotation of the moving soil-removing head 6 is adjusted by the extension and retraction of the telescopic support arm 140, thereby gradually and rapidly excavating the radius of the foundation pit 4 outwards. After removing the front casing 320, the end of the excavation chain frame 221 is exposed, and the rotating soil-removing frame 3 is pushed forward by the mechanical arm to achieve the depth of excavation of the foundation pit 4. Thus, the rotating soil-removing frame 3, in conjunction with the extension and retraction of the telescopic support arm 140, can achieve rapid excavation of foundation pits 4 of various sizes from all directions, while also ensuring real-time transfer of excavated soil, completing an efficient connection from soil excavation to soil transfer.

[0070] like Figure 8 As shown: The excavating frame 200 also includes two side mounting plates 210, which are distributed on both sides of the excavating rotating frame 220. The side mounting plates 210 are used to limit and shape the path of the chain 223 in closed-loop sequential movement.

[0071] It should be noted that the side mounting plate 210 can limit and shape the path of the chain 223 by opening a limiting groove on the side mounting plate 210. The inner surface of the limiting groove is smooth, and the chain 223 is used to limit and shape the chain 223 within the limiting groove to perform closed-loop sequential movement. This is prior art, and its detailed structure can be found in existing literature and journals. It can also be purchased directly from the market, or the components can be purchased from the market and assembled, etc. It is not what this invention is intended to protect, so it will not be described in detail here, nor is it shown in the accompanying drawings.

[0072] like Figures 11-15 As shown: The excavator bucket 224 includes an excavator body 225, a support base 226 and a pusher plate 227. The support base 226 is mounted between two chains 223. A through slot 2261 is provided on the support base 226, and the excavator body 225 is movably inserted into the through slot 2261.

[0073] The pusher plate 227 is mounted on the support base 226.

[0074] Furthermore, such as Figure 14 As shown: The excavator bucket 225 is U-shaped, and a drag plate 2251 is installed at the bottom of the excavator bucket 225. A cylinder telescopic rod 2252 is fixed on the drag plate 2251, and the end of the cylinder telescopic rod 2252 away from the drag plate 2251 is fixed on the support base 226.

[0075] Therefore, when the excavator 224 comes into contact with the soil, the cylinder telescopic rod 2252 is used to push the excavator body 225 further out of the support base 226, so that the excavator body 225 can quickly penetrate into the soil and improve the efficiency of shoveling. When the excavator body 225 carries the soil to the inside of the positioning shell 100, the cylinder telescopic rod 2252 is used to retract the excavator body 225 to the lower end of the support base 226, so that the soil is exposed and the efficiency of soil transfer is improved. In conjunction with the material conveying auger controlled by the electric telescopic rod, the soil is quickly transferred to the inside of the rotating tank 2.

[0076] like Figure 15 As shown: The support base 226 has a placement cavity 2262, and the pusher plate 227 is matched with the size of the placement cavity 2262. The placement cavity 2262 is used to place the pusher plate 227.

[0077] A cylinder extension rod 2263 is installed between the placement cavity 2262 and the pusher plate 227. The cylinder extension rod 2263 is used to control the position of the pusher plate 227 inside the excavation bucket 225.

[0078] Therefore, when the excavator 225 carries the soil to the inside of the positioning shell 100, the cylinder telescopic rod 226 drives the pusher plate 227 to push outward, which in turn retracts the excavator 225 to the lower end of the support base 226, so as to quickly expose the soil and facilitate its rapid transfer; at the same time, after the pusher plate 227 and the excavator 225 move in opposite directions, the pusher plate 227 quickly scrapes the soil off the inner surface of the excavator 225.

[0079] During the process of the excavator 225 penetrating into the soil, the cylinder telescopic rod 226 drives the pusher plate 227 to compress and shape the soil, thereby increasing the compactness of the soil and preventing loose soil from easily spilling out during soil transfer.

[0080] like Figure 9 and Figure 10 As shown: The positioning component 222 includes a guide block 2224, on which a guide groove 2223 is provided. A drive chain is provided inside the guide groove 2223 (the drive chain and chain 223 are respectively meshed on multiple sprockets on the rotating shaft, and the drive chain and chain 223 are driven by the drive motor 110 to move in a closed loop; the rotating shaft rotates and passes through the mounting hole 2222). The drive chain can move in a closed loop along the smooth inner wall of the guide groove 2223.

[0081] Multiple positioning rods 2221 are slidably mounted on the guide groove 2223. The drive chain includes multiple chain links, and the multiple chain links correspond one-to-one with the multiple positioning rods 2221. The positioning rods 2221 are fixed on the chain links, and the end of the positioning rod 2221 away from the chain links is fixed to the bottom of the digging bucket 224. The multiple digging buckets 224 correspond one-to-one with the multiple positioning rods 2221.

[0082] Therefore, during the closed-loop cyclic movement of the drive chain and chain 223 synchronously driven by the drive motor 110, the positioning rod 2221 is ensured to be synchronously positioned between the digging bucket 224 and the guide block 2224; when the digging bucket 224 acts on the soil, the soil will exert a reaction force on the digging bucket 224 (see details). Figure 16 The reaction force direction indicator 228 is located between the digging bucket 224 and the guide block 2224. Since the positioning rod 2221 is simultaneously positioned between the digging bucket 224 and the guide block 2224, the positioning rod 2221 will exert a limiting force on the digging bucket 224 (see details). Figure 16 The limiting force indication direction 229 in the middle realizes the stability of the excavator bucket 224 in excavating soil and the stability of soil transfer during the flexible closed-loop cycle operation.

[0083] As another embodiment of the "digging bucket 224" and "positioning component 222", this application provides, as Figure 17 As shown:

[0084] The positioning component 222 includes a guide block 2224 and a water tank 2226. The water tank 2226 is installed on the side wall of the guide block 2224 and embedded inside the guide block 2224. A water guide slit is provided on the outside of the water tank 2226, which communicates with the inside of the water tank 2226. A limiting groove is provided on each of the two side walls of the water guide slit. A sealing rubber strip 2225 is slidably fitted inside the water guide slit. The sealing rubber strip 2225 is in a closed loop shape with its ends connected. The sealing rubber strip 2225 is slidably fitted inside the limiting groove. A limiting flange is fixed on one side of the sealing rubber strip 2225 inside the limiting groove to prevent the sealing rubber strip 2225 from falling out of the limiting groove. A plurality of water guide pipes 2227 are provided on the sealing rubber strip 2225, and the water guide pipes 2227 communicate with the water tank 2226.

[0085] The guide block 2224 has a guide groove 2223, and a drive chain is installed inside the guide groove 2223. The drive chain can move in a closed loop along the smooth inner wall of the guide groove 2223. Multiple positioning rods 2221 are slidably mounted on the guide groove 2223. The drive chain includes multiple chain links, and the multiple chain links correspond one-to-one with the multiple positioning rods 2221. The positioning rods 2221 are fixed on the chain links, and the end of the positioning rod 2221 away from the chain links is fixed to the bottom of the digging bucket 224. The multiple digging buckets 224 correspond one-to-one with the multiple positioning rods 2221.

[0086] like Figure 8 As shown: The excavator bucket 224 includes an excavator body 225, a support base 226 and a pusher plate 227. The support base 226 is mounted between two chains 223; the pusher plate 227 is mounted on the support base 226.

[0087] The excavator bucket 225 has multiple cutting plates 231 fixed at the opening at its top. Multiple water guides 232 are provided on the cutting plates 231. The multiple water guides 232 are all connected to a water guide cavity 1 provided inside the cutting plates 231. The water guide cavity 1 is connected to a water guide cavity 2 provided inside the excavator bucket 225.

[0088] Multiple excavating buckets 224 are arranged in a one-to-one correspondence with multiple water guide pipes 2227; a water guide connecting pipe 230 is connected to the excavating bucket body 225, which is used to connect the water guide cavity and the water guide pipe 2227.

[0089] Therefore, when the excavator bucket 224 is on the soil, multiple cutting plates 231 can be used to cut into the soil to break up the hard soil layer, so that the excavator bucket 224 can enter the soil accurately and quickly, avoiding the situation where the excavator bucket 224 cannot enter the soil and thus digs empty.

[0090] Meanwhile, as multiple cutting plates 231 cut into the soil, multiple water inlets 232 are used to add water to the soil in sequence to adjust the soil moisture. In addition, the cutting by multiple cutting plates 23 facilitates the efficient transfer of soil between different components in the future (for example, in the process of the material conveying auger quickly transferring the soil into the rotating tank 2, if the soil clods are hard, the material conveying auger cannot find a point of leverage on them).

[0091] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; although embodiments of the invention have been shown and described in the description of this invention, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations 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 mobile soil extraction device for the inner wall of a foundation pit, comprising a storage tank (1) mounted on a robotic arm, a rotating tank (2) rotatably mounted at the bottom of the storage tank (1), and a rotating soil extraction frame (3) mounted on the rotating tank (2), characterized in that, The rotating soil-retrieving frame (3) includes a rotating column (5) and multiple movable soil-retrieving heads (6) mounted around the rotating column (5); the movable soil-retrieving head (6) includes a positioning shell (100) and a soil-digging frame (200) located inside the positioning shell (100). The positioning shell (100) is used to position the soil-digging frame (200) on the soil, and the soil-digging frame (200) excavates the soil through its included rotating soil-digging frame (220). The digging rotating frame (220) includes a digging chain frame (221) and a positioning component (222). The digging chain frame (221) is located outside the positioning component (222). The digging chain frame (221) includes two closed-loop chains (223) and multiple digging buckets (224) mounted between the two chains (223). During the closed-loop sequential movement of multiple excavating buckets (224) driven by the chain (223), the soil is excavated and the excavated soil is transferred to the rotating tank (2) through the positioning shell (100).

2. The mobile soil extraction equipment for the inner wall of a foundation pit according to claim 1, characterized in that, The positioning shell (100) includes a guide cylinder (130) and a telescopic support arm (140). One end of the telescopic support arm (140) is attached to the guide cylinder (130), and the other end is attached to the rotating column (5). A guide hose (120) is connected to the guide cylinder (130), and the guide hose (120) is connected to the guide cylinder (130); a material conveying auger is installed through the main body direction inside the guide hose (120), and the material conveying angle of the material conveying auger is controlled by an electric telescopic rod; the end of the guide hose (120) away from the guide cylinder (130) is connected to the rotating tank (2). The end of the digging chain frame (221) is inserted inside the guide cylinder (130). A drive motor (110) is installed outside the guide cylinder (130). A rotating shaft is fixed on the output shaft of the drive motor (110). Multiple sprockets are fixed on the rotating shaft. The multiple sprockets are used to apply power to the digging chain frame (221) and drive the chain (223) to rotate in a closed loop.

3. The mobile soil extraction equipment for the inner wall of a foundation pit according to claim 2, characterized in that, The mobile soil-collecting head (6) also includes a sealing shell (300), which is covered outside the excavation frame (200); The sealing shell (300) includes a front cover (320) and two side baffles (310), with the two side baffles (310) located on both sides of the excavation chain frame (221) and the front cover (320) covering the end of the excavation chain frame (221); the front cover (320) and the two side baffles (310) are detachably connected.

4. The mobile soil extraction equipment for the inner wall of a foundation pit according to claim 1, characterized in that, The excavating frame (200) also includes two side mounting plates (210), which are distributed on both sides of the excavating rotating frame (220). The side mounting plates (210) are used to limit and shape the path of the chain (223) in closed-loop sequential movement.

5. A mobile soil extraction device for the inner wall of a foundation pit according to claim 1, characterized in that, The excavator bucket (224) includes an excavator body (225), a support base (226), and a pusher plate (227). The support base (226) is mounted between two chains (223). A through slot (2261) is provided on the support base (226), and the excavator body (225) is movably inserted into the through slot (2261). The pusher plate (227) is set on the support base (226).

6. A mobile soil extraction device for the inner wall of a foundation pit according to claim 5, characterized in that, The excavator bucket (225) is U-shaped, and a drag plate (2251) is installed at the bottom of the excavator bucket (225). A cylinder telescopic rod (2252) is fixed on the drag plate (2251), and the end of the cylinder telescopic rod (2252) away from the drag plate (2251) is fixed on the support base (226).

7. A mobile soil extraction device for the inner wall of a foundation pit according to claim 5, characterized in that, The support base (226) has a placement cavity (2262), and the size of the pusher plate (227) matches that of the placement cavity (2262). The placement cavity (2262) is used to place the pusher plate (227). A cylinder extension rod 2 (2263) is installed between the placement cavity (2262) and the pusher plate (227). The cylinder extension rod 2 (2263) is used to control the position of the pusher plate (227) inside the digging bucket (225).

8. The mobile soil extraction equipment for the inner wall of a foundation pit according to claim 1, characterized in that, The positioning component (222) includes a guide block (2224), a guide groove (2223) is provided on the guide block (2224), and a drive chain is provided inside the guide groove (2223). The drive chain can move in a closed loop along the smooth inner wall of the guide groove (2223). Multiple positioning rods (2221) are slidably mounted on the guide groove (2223). The drive chain includes multiple chain links, and the multiple chain links correspond one-to-one with the multiple positioning rods (2221). The positioning rods (2221) are fixed on the chain links, and the end of the positioning rod (2221) away from the chain links is fixed to the bottom of the digging bucket (224). The multiple digging buckets (224) correspond one-to-one with the multiple positioning rods (2221).

9. A mobile soil extraction device for the inner wall of a foundation pit according to claim 1, characterized in that, The positioning component (222) includes a guide block (2224) and a water tank (2226). The water tank (2226) is installed on the side wall of the guide block (2224) and embedded inside the guide block (2224). A water guide slit is provided on the outside of the water tank (2226) and communicates with the inside of the water tank (2226). A limiting groove is provided on each of the two side walls of the water guide slit. A sealing rubber strip (2225) is slidably fitted inside the water guide slit. The sealing rubber strip (2225) is in a closed loop shape with its ends connected. The sealing rubber strip (2225) is slidably fitted inside the limiting groove. A limiting flange is fixed on one side of the sealing rubber strip (2225) inside the limiting groove to prevent the sealing rubber strip (2225) from falling out of the limiting groove. Multiple water guide pipes (2227) are provided on the sealing rubber strip (2225) and the water guide pipes (2227) communicate with the water tank (2226). The guide block (2224) has a guide groove (2223), and a drive chain is installed inside the guide groove (2223). The drive chain can move in a closed loop along the smooth inner wall of the guide groove (2223). Multiple positioning rods (2221) are slidably mounted on the guide groove (2223). The drive chain includes multiple chain links, and the multiple chain links correspond one-to-one with the multiple positioning rods (2221). The positioning rods (2221) are fixed on the chain links, and the end of the positioning rod (2221) away from the chain links is fixed to the bottom of the digging bucket (224). The multiple digging buckets (224) correspond one-to-one with the multiple positioning rods (2221).

10. A mobile soil extraction device for the inner wall of a foundation pit according to claim 9, characterized in that, The excavator bucket (224) includes an excavator body (225), a support base (226), and a pusher plate (227). The support base (226) is mounted between two chains (223); the pusher plate (227) is mounted on the support base (226). The excavator bucket (225) has multiple cutting plates (231) fixed at the opening at its top. Multiple water inlets (232) are provided on the cutting plates (231). The multiple water inlets (232) are all connected to the water inlet cavity one inside the cutting plate (231). The water inlet cavity one is connected to the water inlet cavity two inside the excavator bucket (225). Multiple excavating buckets (224) are in one-to-one correspondence with multiple water pipes (2227); a water connecting pipe (230) is connected to the excavating bucket body (225), which is used to connect the water guiding chamber and the water pipe (2227).

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