A foundation pit slagging system and a method of using the same

Abstract

This invention discloses a pit slag removal system and its usage method. The system includes: a transport vehicle equipped with a support lifting device, the transport vehicle being used to transport the support lifting device to a designated position; and a second spiral blade slag removal device, with a lifting wheel assembly between it and the support lifting device, the lifting wheel assembly being used to lift the second spiral blade slag removal device, so that the second spiral blade slag removal device is placed inside the pit. The pit slag removal system of this invention is integrated, requiring the driver to only drive the vehicle to the designated position and operate the machine only during assembly and disassembly, solving the cumbersome process of repetitive operation of traditional cranes. Furthermore, it eliminates the need for constant observation of the pit's interior, avoiding the poor visibility problem of traditional cranes. In addition, the system is easy to operate and requires low skill levels from the driver.

Description

Technical Field

[0001] This invention relates to a slag removal system for foundation pits and its usage method. Background Technology

[0002] To address urban traffic problems, major cities have begun to use grade-separated interchanges or underground tunnels to alleviate congestion on main roads. In most cities, underground stations, underground tunnels, and underground utility tunnels are now commonplace, and the excavation depth of foundation pits is increasing, with ultra-deep and ultra-large foundation pits emerging in large numbers.

[0003] During the excavation of deep foundation pits, the duration of construction directly impacts their safety. Excavation and earthwork transportation constitute the longest part of the construction process. The speed of muck removal can, in some cases, become a critical factor limiting the project schedule. Addressing the excavation and transportation issues becomes particularly important when the pit area increases, the excavation depth deepens, the earthwork transportation distance is long, and the volume of earthwork is large.

[0004] Currently, the excavation of subway foundation pits usually involves excavating soil with excavators and dumping it into slag pits or onto dump trucks, or using dump trucks to transport the slag inside the foundation pit.

[0005] When transporting excavated soil from deep foundation pits, a long-arm excavation method is used. The excavated soil is lifted from the pit using a crane grab bucket, and then the soil and rocks in the grab bucket are directly dumped onto the transport vehicle.

[0006] As slag removal methods have been continuously improved, new slag removal methods have emerged, such as using improved cranes, gantry cranes, and crawler structures, to transport slag out of the foundation pit and dump it onto transport vehicles.

[0007] The existing technology has the following problems and shortcomings:

[0008] (1) When using dump trucks to drive and operate in the foundation pit during shallow foundation pit excavation, the weight of the dump trucks plus the soil they transport will disturb the foundation soil. Moreover, during the transportation process, multiple dump trucks need to be repeatedly transported in the foundation pit, which will have a certain impact on the construction safety in the foundation pit.

[0009] (2) During the earthwork transportation process by dump trucks, due to the large amount of dust in the foundation pit and the earthwork falling off the dump trucks during the transportation process, a large amount of dust is raised inside the foundation pit, which affects the construction environment and reduces the efficiency of earthwork transportation.

[0010] (3) As the excavation process continues and the foundation pit deepens, it is necessary to change the slag removal method.

[0011] (4) Among the various new types of slag removal methods for foundation pits, gantry crane slag removal and crawler slag removal are commonly used. For gantry crane slag removal, due to the inherent structure of the gantry crane, the lifting unit is difficult to disassemble, making slag loading and unloading cumbersome. For crawler slag removal, the crawler cannot adjust its length according to the changes in the depth of the foundation pit, resulting in low slag removal efficiency. Summary of the Invention

[0012] The main objective of this invention is to provide a slag removal system for foundation pits and its usage method to solve the above-mentioned technical problems.

[0013] The objective of this invention can be achieved by adopting the following technical solution:

[0014] A foundation pit slag removal system includes:

[0015] A transport vehicle equipped with a support lifting device is used to transport the support lifting device to a designated location.

[0016] The second spiral blade slag discharge device is provided with a hanging wheel assembly between it and the support lifting device. The hanging wheel assembly is used to lift the second spiral blade slag discharge device so that it can be placed in the foundation pit to transport the slag from the foundation pit in a predetermined direction. The second spiral blade slag discharge device includes multiple unit components spliced ​​together along the height direction. Each unit component of the second spiral blade slag discharge device includes a steel pipe and spiral blades surrounding the outside of the steel pipe. Support seats are provided at the top and bottom ends of the steel pipe. Two adjacent unit components along the height direction are spliced ​​together through two adjacent support seats.

[0017] The first spiral cutter blade slag discharge device is mounted on the support lifting device and is used to receive slag from the second spiral cutter blade slag discharge device.

[0018] A gear device is provided between the first spiral blade slag discharge device and the support lifting device. The support lifting device is used to raise and lower the height of the first spiral blade slag discharge device and drive the gear device, so that the gear device drives the first spiral blade slag discharge device to move in another preset direction.

[0019] A foldable outer shell is disposed on the outside of the second spiral cutter blade slag discharge device, and the foldable outer shell is a structure that can be folded along the height direction of the second spiral cutter blade slag discharge device.

[0020] Preferably, the first spiral cutter blade slag discharge device is horizontally arranged, the second spiral cutter blade slag discharge device is vertically arranged, and a slag conveyor belt is provided between the first spiral cutter blade slag discharge device and the second spiral cutter blade slag discharge device so that the slag from the second spiral cutter blade slag discharge device is transferred to the first spiral cutter blade slag discharge device.

[0021] Preferably, a slag discharge hopper is provided at the rear end of the first spiral blade slag discharge device, and a muck truck is placed below the slag discharge hopper.

[0022] Preferably, the gear device includes a gear assembly, which meshes with a fixed chain. The fixed chain is disposed on the housing of the first spiral cutter blade slag discharge device. The gear assembly is connected to a rotary motor, which drives the gear assembly to cause the fixed chain to move the first spiral cutter blade slag discharge device in a horizontal direction.

[0023] Preferably, it also includes a slag inlet funnel, which includes a funnel body, a sliding buckle, and telescopic support legs on both sides of the funnel body. The sliding buckle is slidably connected to the funnel body.

[0024] Preferably, the foldable shell is composed of multiple shells, each shell having an upper and a lower frame, and a foldable portion between the upper and lower frames.

[0025] Preferably, the rear of the foldable shell has a protrusion, and the transport vehicle is equipped with a clamp-type retainer, the front end of which is provided with a claw for clamping the protrusion of the shell.

[0026] A method for using a foundation pit slag removal system includes the following steps:

[0027] Step 1: Drive the transport vehicle to the designated position, and use the support lifting device to drive the gear device to make the first spiral cutter blade slag discharge device move horizontally;

[0028] Step 2: Adjust the support lifting device to move the first spiral cutter blade slag discharge device vertically;

[0029] Step 3: After the first spiral cutter blade slag discharge device moves to the designated position, adjust the position of the second spiral cutter blade slag discharge device by operating the lifting wheel assembly so that it is located above the foundation pit;

[0030] Step 4: Use the lifting wheel assembly to place the shell connected to it at the bottom of the pit, open the buckle of the shell, and then slowly pull the shell up using the lifting wheel assembly. At this time, the shell will gradually unfold under the action of gravity. At the same time, ensure that the shell is placed stably at the bottom of the pit.

[0031] Step 5: As the foldable outer shell gradually unfolds, the second spiral blade slag discharge device is simultaneously assembled.

[0032] Step 6: When the shell is unfolded to the preset height, use the jaw clamps of the clamp retainer to fix the unfolded shell;

[0033] Step 7: Assemble the slag inlet funnel to the bottom area of ​​the outer shell, open the telescopic support legs and fix the slag inlet funnel;

[0034] Step 8: After assembly, the slag is transported to the slag inlet hopper by manual labor or excavator. The slag is transported upward through the rotating blades of the second spiral blade slag discharge device to the upper end of the second spiral blade slag discharge device. It is then transported to the first spiral blade slag discharge device by the slag conveyor belt. Finally, the slag is discharged by the slag discharge hopper located below the rear end of the first spiral blade slag discharge device.

[0035] Step 9: As the depth of the foundation pit changes, adjust the height of the second spiral blade slag discharge device using the support lifting device and the hanging wheel assembly on it. During the height adjustment process, continue to splice the unit components of the second spiral blade slag discharge device to adapt to the changes in depth during the slag discharge process of the foundation pit.

[0036] Step 10: After use, first disassemble the slag inlet hopper, and then disassemble the second spiral cutter blade slag discharge device step by step at the bottom of the foundation pit. During the disassembly of the second spiral cutter blade slag discharge device, first disassemble one unit component, and then lower the remaining unit components and foldable shell through the lifting wheel assembly. When the foldable shell is partially folded, continue to disassemble one unit component, and so on, until the disassembly process of the second spiral cutter blade slag discharge device is completed. After the foldable shell is folded, pull it out of the foundation pit through the lifting wheel assembly.

[0037] Beneficial technical effects of the present invention:

[0038] The excavation pit muck removal system of the present invention can greatly improve the muck removal efficiency during subway excavation, especially for deep pits, and also improve the convenience and safety of the muck removal process.

[0039] First, this system is equipped with a gear device and a lifting support device. The gear device moves the first spiral cutter blade slag discharge device, satisfying the lateral displacement of the first spiral cutter blade slag discharge device. The hydraulic lifting of the lifting support device satisfies the longitudinal displacement of the first spiral cutter blade slag discharge device, realizing the integrated and mobile design of the foundation pit slag discharge system, and improving the flexibility and convenience of the foundation pit slag discharge system.

[0040] Secondly, the main body of the slag removal system is located outside the slag removal system. This ensures that the center of gravity of the slag removal system is outside the slag removal system, improving the safety of the slag removal system. At the same time, it also ensures that only a small part is located inside the slag removal system. In addition, the vertical part of the slag removal system occupies a small amount of space inside the slag removal system. This makes it suitable for complex slag removal environments and can also be used inside slag removal systems with a large number of anchor bolts, thus improving the applicability of the device.

[0041] Third, the pit slag removal system uses a roller assembly to lift the second spiral blade slag removal device inside the pit. At the same time, the second spiral blade slag removal device adopts a modular structure and a foldable shell, which can achieve continuous operation and convenient disassembly and assembly.

[0042] Fourth, the excavation pit slag removal system uses spiral cutter blades to transport slag and an integrated machine body. The continuity of the spiral cutter blades can greatly improve the continuity of slag transportation. The integrated machine body and the high slag outlet eliminate the need for separate loading of slag into trucks in traditional equipment, thus greatly improving the efficiency and practicality of slag removal.

[0043] Finally, the integrated pit slag removal system allows the driver to simply move the vehicle to the designated location and operate the machine only during assembly and disassembly, eliminating the tedious process of repetitive operations associated with traditional cranes. Furthermore, it eliminates the need to constantly monitor the pit's interior and avoids the poor visibility issues inherent in traditional cranes. In addition, the system is easy to operate and requires minimal skill from the operator. Attached Figure Description

[0044] Figure 1 This is a front view schematic diagram of a pit slag removal system according to an embodiment of the present invention;

[0045] Figure 2 This is a front view schematic diagram of a gear device according to an embodiment of the present invention;

[0046] Figure 3 This is a side view schematic diagram of a gear device according to an embodiment of the present invention;

[0047] Figure 4 This is a top view schematic diagram of a foldable housing according to an embodiment of the present invention;

[0048] Figure 5 This is a side view schematic diagram of a foldable housing according to an embodiment of the present invention;

[0049] Figure 6 This is a front view schematic diagram of a foldable housing according to an embodiment of the present invention;

[0050] Figure 7 A front view schematic diagram of a second spiral cutter blade slag discharge device having two unit components according to an embodiment of the present invention;

[0051] Figure 8 A schematic diagram of a unit component of the second spiral cutter blade slag discharge device according to an embodiment of the present invention;

[0052] Figure 9 This is a top view of the base of the second spiral cutter blade slag discharge device according to an embodiment of the present invention;

[0053] Figure 10This is a front view of the slag inlet funnel according to an embodiment of the present invention;

[0054] Figure 11 This is a schematic diagram of the slag inlet funnel according to an embodiment of the present invention;

[0055] Figure 12 This is a front view schematic diagram of a clamp retainer according to an embodiment of the present invention;

[0056] Figure 13 This is a side view of a clamp retainer according to an embodiment of the present invention.

[0057] In the diagram: 1-First spiral cutter blade slag discharge device, 2-Gear device, 21-Fixed chain, 22-External gear, 3-Support lifting device, 31-Internal gear, 32-Rotary motor, 33-Hanging wheel assembly, 4-Slag conveying track, 5-Foldable outer shell, 51-Outer shell slag inlet, 52-Slag inlet buckle, 6-Second spiral cutter blade slag discharge device, 61-Spiral cutter blade, 62-Connecting steel pipe, 63-Cross base, 7-Slag inlet funnel, 71-Sliding buckle, 72-Telescopic support foot, 8-Pliers-type fixing device, 81-Claw clamp, 9-Carrier vehicle, 10-Slag discharge funnel. Detailed Implementation

[0058] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0059] like Figures 1-13 As shown, the slag removal system for the foundation pit provided in this embodiment includes a first spiral blade slag removal device 1, a gear device 2, a support lifting device 3, a second spiral blade slag removal device 6, a clamp-type fixing device 8, and a transport vehicle 9.

[0060] The support lifting device 3 is installed on the transport vehicle 9. The transport vehicle 9 transports the first spiral cutter blade slag discharge device 1 and the second spiral cutter blade slag discharge device 6 to the designated location by transporting the support lifting device 3.

[0061] The first spiral cutter blade slag discharge device 1 is horizontally arranged, and the second spiral cutter blade slag discharge device 6 is vertically arranged. A slag conveying track 4 is provided between the first spiral cutter blade slag discharge device 1 and the second spiral cutter blade slag discharge device 6. The slag discharge port at the upper end of the second spiral cutter blade slag discharge device 6 is fixedly connected to the slag conveying track 4 by a buckle, so that the slag from the second spiral cutter blade slag discharge device 6 can be transported to the first spiral cutter blade slag discharge device 1 by the slag conveying track 4.

[0062] A slag discharge hopper 10 is provided below the rear end of the first spiral blade slag discharge device 1, and the space below the slag discharge hopper 10 is used to place a muck truck.

[0063] The outer shell 11 of the first spiral blade slag discharge device 1 is fixed to the gear device 2, and the two pass through the support lifting device 3. The support lifting device 3 can not only support the first spiral blade slag discharge device 1, but also lift it.

[0064] The gear device 2 includes an internal gear 31, an external gear 22 (the internal and external gears constitute a gear assembly), and a fixed chain 21. The external gear 22 and the fixed chain 21 mesh with each other. The fixed chain 21 is fixed on the outer shell 11 of the first spiral blade slag discharge device 1. The internal gear 31 is located on the inner wall of the lifting support device 3 and is rotated and fixed. The rotational power of the internal gear 31 is provided by the rotating motor 32 on the inner wall. The entire gear device 2 passes through the lifting support device 3. When the internal gear 31 rotates, it meshes with the external gear 22, causing the external gear 22 to rotate as well. In this way, the outer shell of the first spiral blade slag discharge device 1 will move horizontally under the drive of the fixed chain 21. This design allows the first set of spiral blade slag discharge devices 1 to be flexibly adjusted in position according to engineering needs.

[0065] The second spiral blade slag discharge device 6 has a foldable outer shell 5 with a slag inlet hopper 7 on one side. The slag inlet hopper 7 includes a hopper body, a sliding buckle 71 and telescopic support feet 72 on both sides of the hopper body. The sliding buckle 71 is slidably connected to the hopper body. The position of the hopper body relative to the sliding buckle 71 and the length of the telescopic support feet 72 are adjusted according to the actual engineering situation to make the slag inlet hopper 7 stable.

[0066] The rear of the foldable outer shell 5 of the second spiral blade slag discharge device 6 is convex (i.e., has a protruding part), which facilitates the clamps 81 of the clamp-type retainer 8 to fix its position. The foldable outer shell 5 is a foldable structure that can be unfolded or folded under certain stress. The foldable outer shell 5 is composed of multiple shells, each shell having upper and lower frames, with a foldable part between the two frames. The foldable part can be two hinged metal plates. The front of the foldable outer shell 5 has an openable slag inlet 51 and a slag inlet buckle 5. 2. When the equipment is running, the slag inlet 51 of the outer shell needs to be opened and connected to the slag funnel 7. The sliding buckle 71 is used to adjust the position of the telescopic support foot 72 and the funnel body. After the flip cover of the slag inlet 51 of the outer shell is flipped up, the slag inlet buckle 52 on the flip cover is fastened to the buckle 52 on the flip cover above it. In this way, the foldable outer shell 5 is opened, and then the slag funnel is fixed so that the slag funnel 7 and the slag inlet 51 of the outer shell can be stably connected together to prevent the slag from falling off or leaking during the slag transportation process.

[0067] The second spiral blade rotary slag discharge device 6 is assembled from various unit components during use. The number of unit components is determined according to the depth of the pit. The main body of the unit component is a number of steel pipes 62 with a certain strength, with external threads at the top and internal threads at the bottom. There are cross support seats 63 at the top and bottom of the steel pipes 62. A channel runs through the center of the base, and the steel pipes 62 are located in the channel. The spiral blades 61 are wrapped around the body of the steel pipes 62. During the assembly process, the workers tighten the two adjacent steel pipes and then tighten the four nuts of the adjacent cross support seats to complete the assembly process of the unit component.

[0068] The base of the clamp-type fixture 8 is fixed to the (vertical) telescopic rod at the rear end of the carrier vehicle 9. Hydraulic jacks for stabilizing the clamp-type fixture 8 are connected to both sides of the telescopic rod. The front end of the clamp-type fixture 8 is a claw 81 that can clamp the protrusion of the foldable shell 5. The hydraulic telescopic rod at the rear end of the clamp-type fixture 8 is used to control the force of the claw 81 to play an auxiliary role in fixing the second spiral blade slag discharge device 6, ensuring that the second spiral blade slag discharge device 6 can remain stable during use. The vertical telescopic rod at the rear end of the claw 81 can adjust the angle of the claw to further fix the second spiral blade slag discharge device 6.

[0069] The lifting wheel assembly 33 is located at the top of the supporting lifting device 3. The lifting wheel assembly 33 includes rollers and traction components that work together. By operating different traction components, the second spiral blade slag discharge device 6 and the foldable outer shell 5 can be lifted respectively.

[0070] In this embodiment, the design and connection method of each component takes into account the changes in the depth of the foundation pit, the number of splicing unit components, and the actual engineering needs of easy disassembly and adjustment. By adjusting the connection method and structural design of each component, the entire spiral slag discharge device can carry out slag discharge operations in deep foundation pits efficiently and safely in actual engineering.

[0071] In this embodiment, the slag removal system can handle slag pits of various depths. By splicing different numbers of unit components, the length of the slag removal device can be adjusted. At the same time, the design of components such as clamp-type fixing devices, slag inlet funnels, and slag outlet funnels enables the equipment to better adapt to changes and needs at the engineering site during operation, thereby improving the efficiency and safety of slag removal operations.

[0072] A method for using a foundation pit slag removal system includes the following steps:

[0073] Step 1: Drive the transport vehicle 9 to the designated position, drive the gear device 2 through the support lifting device 3, rotate the internal gear 22 and the external gear 31, and use the fixed chain 21 set on the outer shell of the first spiral blade slag discharge device 1 to realize the horizontal movement of the first spiral blade slag discharge device 1.

[0074] Step 2: Adjust the support lifting device 3 to lift the first spiral cutter blade slag discharge device 1, so that the first spiral cutter blade slag discharge device 1 can be moved to a suitable position in the height direction;

[0075] Step 3: After the first spiral cutter blade slag discharge device 1 is moved into place, the operator adjusts the position of the second spiral cutter blade slag discharge device 6 by operating the hanging wheel assembly 33 connected to the foldable outer shell 5 of the second spiral cutter blade slag discharge device 6, so that it is located above the foundation pit.

[0076] Step 4: Using the roller assembly 33, place the foldable outer shell 5 of the second spiral cutter blade slag discharge device 6 connected to it at the bottom of the pit. Then, slowly pull up the traction component of the roller assembly 33 connected to the top of the foldable outer shell 5. At this time, the foldable outer shell 5 will unfold step by step under the action of gravity. At the same time, ensure that the foldable outer shell 5 is placed stably at the bottom of the pit to prevent the equipment from tilting or rolling during the unfolding process.

[0077] Step 5: As the foldable outer shell 5 gradually unfolds, the second spiral blade slag discharge device 6 is simultaneously spliced, so that the height of the spliced ​​second spiral blade slag discharge device 6 can not only adapt to the height of the first spiral blade slag discharge device 1, but also adapt to the depth of the foundation pit.

[0078] Step 6: When the foldable outer shell 5 of the second spiral cutter blade slag discharge device 6 is unfolded to the preset height (the top of the foldable outer shell 5 rises to the position connected to the slag conveyor belt 4), the pliers 81 of the clamp-type fixing device 8 are used to fix the unfolded foldable outer shell 5.

[0079] Step 7: Assemble the slag inlet funnel 7 to the bottom area of ​​the foldable outer shell 5, open the telescopic support foot 72 and fix the slag inlet funnel 7. Adjust the position of the slag inlet funnel 7 according to the actual project conditions to make it stable and balanced.

[0080] Step 8: After assembly, the slag can be transported to the slag inlet hopper 7 by manual labor or excavator. The slag is transported to the upper end of the second spiral blade slag discharge device 6 by rotating blades, and then transported to the first spiral blade slag discharge device 1 by the slag conveyor belt 4. Finally, the slag is discharged by the slag discharge hopper 10 located below the rear end of the first spiral blade slag discharge device 1.

[0081] Step 9: As the depth of the foundation pit changes, the height of the second spiral blade slag discharge device 6 is adjusted using the support lifting device 3 and the hanging wheel assembly 33 on it. During the height adjustment process, the unit components of the second spiral blade slag discharge device 6 can be spliced ​​or disassembled to adapt to the changes in depth during the slag discharge process of the foundation pit.

[0082] Step 10: After use, first disassemble the slag inlet hopper 7, and then disassemble the second spiral cutter blade slag discharge device 6 step by step at the bottom of the pit. First, disassemble one unit component, and then lower the remaining unit components and the foldable shell 5 through the lifting wheel assembly 33. When the foldable shell 5 is partially folded due to gravity, continue to disassemble the remaining unit component. After the unit component is disassembled, fold a part of the foldable shell 5, and so on, until the second spiral cutter blade slag discharge device 6 is completely disassembled. After the foldable shell 5 is folded, pull it directly out of the pit through the lifting wheel assembly 33. This is one of the purposes of setting up the lifting wheel assembly 33.

[0083] In this embodiment, the top of the foldable outer shell 5 and the first unit component of the second spiral blade slag discharge device 6 are always fixed. That is, the unit component is not disassembled during the disassembly process. In addition, when the foldable outer shell 5 is unfolded, there is a unit component inside that rises along with it.

[0084] In this embodiment, when disassembling the second spiral blade slag discharge device 6, the unit components of the second spiral blade slag discharge device 6 inside the foldable outer shell 5 can be gradually disassembled through the slag inlet 51 of the outer shell.

[0085] In this embodiment, after disassembling the second spiral cutter blade slag discharge device 6, the connection between the slag discharge port of the second spiral cutter blade slag discharge device 6 and the slag conveyor belt 4 is loosened. In summary, in this embodiment, the slag discharge system can greatly improve the slag discharge efficiency during subway foundation pit excavation, especially for deep foundation pits, and improves the convenience and safety of the slag discharge process.

[0086] First, this system is equipped with a gear device 2 and a lifting support device 3. The gear device 2 moves the first spiral blade slag discharge device 1, satisfying the lateral displacement of the first spiral blade slag discharge device 1. The hydraulic lifting of the lifting support device 3 satisfies the longitudinal displacement of the first spiral blade slag discharge device 1, realizing the integrated and movable design of the foundation pit slag discharge system and improving the flexibility and convenience of the foundation pit slag discharge system.

[0087] Secondly, the main body of the slag removal system is located outside the slag removal system. This ensures that the center of gravity of the slag removal system is outside the slag removal system, improving the safety of the slag removal system. At the same time, it also ensures that only a small part is located inside the slag removal system. In addition, the vertical part of the slag removal system occupies a small amount of space inside the slag removal system. This makes it suitable for complex slag removal environments and can also be used inside slag removal systems with a large number of anchor bolts, thus improving the applicability of the device.

[0088] Third, the pit slag removal system uses a roller assembly to lift the second spiral blade slag removal device inside the pit. At the same time, the second spiral blade slag removal device adopts a modular structure and a foldable shell to achieve continuous operation and convenient assembly and disassembly.

[0089] During the assembly of the second spiral cutter blade slag discharge device, the hanging wheel assembly lifts the outer shell, causing the outer shell to unfold step by step under the action of gravity. While the outer shell unfolds, the components of the second spiral cutter blade slag discharge device are gradually spliced ​​together, which can achieve smooth splicing of the components.

[0090] Through this series of operations, the second spiral blade slag removal device can achieve continuous operation when the depth of the foundation pit changes, and at the same time greatly improves the convenience of disassembly and assembly of the device. In addition, this design enables the device to adapt to slag removal projects in deep foundation pits of different depths, and has high flexibility.

[0091] During the disassembly process, the individual unit components of the second spiral cutter blade slag discharge device are disassembled step by step. The lifting wheel assembly is lowered during this process to make it easier for operators to disassemble each unit component. As each component is disassembled, the overall height of the second spiral cutter blade slag discharge device gradually decreases.

[0092] Fourth, the excavation pit slag removal system uses spiral cutter blades to transport slag and an integrated machine body. The continuity of the spiral cutter blades can greatly improve the continuity of slag transportation. The integrated machine body and the high slag outlet eliminate the need for separate loading of slag into trucks in traditional equipment, thus greatly improving the efficiency and practicality of slag removal.

[0093] Finally, the integrated pit slag removal system allows the driver to simply move the vehicle to the designated location and operate the machine only during assembly and disassembly, eliminating the tedious process of repetitive operations associated with traditional cranes. Furthermore, it eliminates the need to constantly monitor the pit's interior and avoids the poor visibility issues inherent in traditional cranes. In addition, the system is easy to operate and requires minimal skill from the operator.

[0094] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A slag removal system for foundation pits, characterized in that, include: A transport vehicle (9) is provided with a support lifting device (3), which is used to transport the support lifting device (3) to a designated location; The second spiral blade slag discharge device (6) is provided with a hanging wheel assembly (33) between it and the support lifting device (3). The hanging wheel assembly (33) is used to lift the second spiral blade slag discharge device (6) so that the second spiral blade slag discharge device (6) can be placed in the foundation pit to transport the slag from the foundation pit in a preset direction. The second spiral blade slag discharge device (6) includes multiple unit components spliced ​​along the height direction. The first spiral blade slag discharge device (1) is mounted on the support lifting device (3) and is used to receive slag from the second spiral blade slag discharge device (6). A gear device (2) is provided between the first spiral blade slag discharge device (1) and the support lifting device (3). The support lifting device (3) is used to raise and lower the height of the first spiral blade slag discharge device (1) and drive the gear device (2), so that the gear device (2) drives the first spiral blade slag discharge device (1) to move in another preset direction. A foldable outer shell (5) is provided on the outside of the second spiral blade slag discharge device (6), and the foldable outer shell (5) is a structure that can be folded along the height direction of the second spiral blade slag discharge device (6); The first spiral blade slag discharge device (1) is set horizontally, the second spiral blade slag discharge device (6) is set vertically, and a slag conveyor belt (4) is set between the first spiral blade slag discharge device (1) and the second spiral blade slag discharge device (6) so that the slag from the second spiral blade slag discharge device (6) is transferred to the first spiral blade slag discharge device (1). The gear device (2) includes a gear assembly, which meshes with a fixed chain (21). The fixed chain (21) is disposed on the outer shell of the first spiral blade slag discharge device (1). The gear assembly is connected to a rotary motor (32). The rotary motor (32) drives the fixed chain (21) to move the first spiral blade slag discharge device (1) in a horizontal direction by driving the gear assembly. It also includes a slag inlet funnel (7), which includes a funnel body, a sliding buckle (71) and telescopic support feet (72) on both sides of the funnel body. The sliding buckle (71) is slidably connected to the funnel body. The second spiral blade slag discharge device (6) includes a steel pipe (62) and a spiral blade (61) surrounding the outside of the steel pipe (62). The top and bottom ends of the steel pipe (62) are provided with support seats (63). Two adjacent unit components along the height direction are spliced ​​together through two adjacent support seats (63). The first spiral blade slag discharge device (1) is provided with a slag discharge funnel (10) at its rear end, and the slag discharge funnel (10) is used to place a muck truck below it. The foldable shell (5) is composed of multiple shells, each shell having an upper and lower frame, and a foldable part between the upper and lower frame; The rear of the foldable shell (5) has a protrusion, and the carrier (9) is provided with a clamp-type retainer (8), and the front end of the clamp-type retainer (8) is provided with a claw (81) for clamping the protrusion of the foldable shell (5).

2. The method of using a slag removal system for foundation pits according to claim 1, characterized in that, Includes the following steps: Step 1: Drive the transport vehicle (9) to the designated position, and drive the gear device (2) through the support lifting device (3) to make the first spiral cutter blade slag discharge device (1) move horizontally; Step 2: Adjust the support lifting device (3) to make the first spiral cutter blade slag discharge device (1) move vertically; Step 3: After the first spiral cutter blade slag discharge device (1) moves to the designated position, the position of the second spiral cutter blade slag discharge device (6) is adjusted by operating the traction component connected to the second spiral cutter blade slag discharge device (6) through the roller assembly (33) to make it located above the foundation pit; Step 4: Use the roller assembly (33) to place the foldable shell (5) connected to it at the bottom of the pit, open the foldable shell (5), and then slowly pull up the traction piece connected to the top of the roller assembly (33) and the foldable shell (5). At this time, the foldable shell (5) will gradually unfold under the action of gravity. At the same time, ensure that the foldable shell (5) is placed stably at the bottom of the pit. Step 5: As the foldable outer shell (5) gradually unfolds, the second spiral blade slag discharge device (6) is simultaneously spliced. Step 6: When the foldable shell (5) is unfolded to the preset height, use the claw (81) of the clamp-type retainer (8) to fix the unfolded foldable shell (5); Step 7: Attach the slag inlet funnel (7) to the bottom area of ​​the foldable outer shell (5), open the telescopic support foot (72) and fix the slag inlet funnel (7). Step 8: After assembly, the slag is transported to the slag inlet hopper (7) by manual labor or excavator. The slag is transported to the upper end of the second spiral blade slag discharge device (6) by rotating blades of the second spiral blade slag discharge device (6) and then transported to the first spiral blade slag discharge device (1) by the slag conveyor belt (4). Finally, the slag is discharged by the slag discharge hopper (10) located below the rear end of the first spiral blade slag discharge device (1). Step 9: As the depth of the foundation pit changes, the height of the second spiral blade slag discharge device (6) is adjusted using the support lifting device (3) and the hanging wheel assembly (33) on it. During the height adjustment process, the unit components of the second spiral blade slag discharge device (6) are spliced ​​to adapt to the changes in depth during the slag discharge process of the foundation pit. Step 10: After use, first disassemble the slag inlet hopper (7), and then disassemble the second spiral blade slag discharge device (6) step by step at the bottom of the pit. During the disassembly of the second spiral blade slag discharge device (6), disassemble one unit component first, and then lower the remaining unit components and foldable shell (5) through the lifting wheel assembly (33). When the foldable shell (5) is folded in part, disassemble another unit component, and so on, until the disassembly process of the second spiral blade slag discharge device (6) is completed. After the foldable shell (5) is folded, pull it out of the pit through the lifting wheel assembly (33).

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