Foundation pit slurry long-distance pumping and conveying device

Abstract

The application discloses a kind of long-distance pumping and conveying device of foundation pit slurry, belongs to conveying pump device technical field, and a kind of long-distance pumping and conveying device of foundation pit slurry, including conveying base, the side of the conveying base is provided with booster pipe, the side of the booster pipe is fixedly installed with first booster cavity, the side of the first booster cavity is provided with second booster cavity, the output end of the second booster cavity is fixedly installed with sending pipe, by being provided with the structure of slurry booster interface, can control boost when long-distance conveying of foundation pit slurry to slurry, to improve the fluidity of slurry as a whole, by the structure of relay pipe in society, relay pipe is set in the front end of turning or uphill topography position, when slurry is blocked in special position, its pressure will be through reset pressure relief valve, to subsequent slurry is discharged pressure, while clean water pump will pump into clean water in relay pipe, dilute slurry, to reduce blockage, to dredge pipeline.

Description

Technical Field

[0001] This invention relates to the field of pumping device technology, and more specifically, to a long-distance pumping and conveying device for foundation pit slurry. Background Technology

[0002] In the field of construction, the effective transportation of foundation pit slurry is crucial for the smooth progress of projects. With the continuous development of urban construction and the increasing scale of construction projects, long-distance pumping and transportation of foundation pit slurry has become a common requirement. However, existing technologies and equipment for long-distance pumping and transportation of foundation pit slurry have many problems, which seriously affect construction efficiency and project quality.

[0003] During long-distance mud transportation, pipeline layout is complex and it is difficult to lay it in a straight line throughout the entire process. In actual construction, bends or uphill sections are inevitable. At these special locations, mud is prone to clogging. Mud itself has the characteristics of viscosity and poor fluidity. When encountering a bend in the pipeline, the direction of mud flow changes, and some mud is easy to adhere to the inner wall of the pipeline, gradually accumulating and forming a blockage. When laid uphill, the mud needs to overcome gravity to flow upward, which increases the flow resistance and makes it easier for mud to accumulate at that location, leading to frequent clogging.

[0004] If slurry accumulates in these areas, the internal pressure will rise sharply. With continued pumping of slurry, the pressure will build up, and if not addressed promptly and effectively, the pressure inside the pipeline will exceed safe limits, potentially leading to a complete blockage. Pipeline blockage not only interrupts slurry delivery and affects construction progress but also requires significant manpower and resources for clearing, increasing construction costs. In severe cases, it can even cause pipeline rupture, resulting in slurry leakage, pollution of the construction site and surrounding environment, and posing safety hazards.

[0005] Traditional long-distance pumping and conveying devices for foundation pit slurry often lack targeted solutions to cope with these complex pipeline layouts. Most devices only focus on the pumping power of the slurry, while neglecting the real-time monitoring and control of the slurry flow state in the pipeline. They cannot detect and deal with the slurry blockage problem in special locations in a timely manner. At the same time, there are no reasonable pressure reduction measures for the pressure increase caused by blockage, making the pipeline less adaptable to complex layouts.

[0006] Existing long-distance pumping and conveying devices for foundation pit slurry have serious shortcomings in dealing with special layout situations such as pipeline bends and uphill sections, making it difficult to meet the needs of modern construction for efficient and stable slurry transportation. Therefore, there is an urgent need to develop a new type of long-distance pumping and conveying device for foundation pit slurry that can effectively solve the problem of slurry blockage in special locations, monitor and regulate the pressure inside the pipeline in real time, ensure smooth long-distance slurry transportation, improve construction efficiency, and ensure project quality and construction safety. This invention aims to provide such an innovative device to address the challenges of existing technologies and provide a reliable solution for slurry transportation in the construction field. Summary of the Invention

[0007] The purpose of this invention is to provide a long-distance pumping and conveying device for foundation pit slurry to solve the problems mentioned in the background art.

[0008] A long-distance pumping and conveying device for foundation pit mud includes a conveying base, a pressure boosting pipe is provided on the side of the conveying base, a first pressure boosting chamber is fixedly installed on the side of the pressure boosting pipe, a second pressure boosting chamber is provided on the side of the first pressure boosting chamber, and an outlet pipe is fixedly installed at the output end of the second pressure boosting chamber. A mud pressurization interface is fixedly installed on the side of the delivery pipe, a pressurization component is fixedly installed on the side of the mud pressurization interface, a second drive motor is fixedly installed on the side of the pressurization component, a connecting pipe is fixedly installed at the output end of the pressurization component, a relay pipe is fixedly installed on the side of the connecting pipe, a processing pipe is provided on the upper side of the relay pipe, a clean water pump is fixedly installed on one side of the processing pipe, and a third drive motor is fixedly installed on the side of the clean water pump. The treatment pipe and relay pipe are provided with several guide pipes at equal intervals on both sides. An isolation plate is fixedly installed in the middle of the treatment pipe. An electrically controlled switch valve is fixedly installed inside the guide pipe on the side of the treatment pipe closer to the clean water pump. A reset pressure relief valve is fixedly installed inside the guide pipe on the side of the treatment pipe away from the clean water pump.

[0009] Furthermore, a stabilizing sleeve is fixedly installed at the upper middle part of the conveying base, a first drive motor is fixedly installed on one side of the stabilizing sleeve, and a booster pipe is fixedly installed on the other side of the stabilizing sleeve. The output end of the first drive motor is fixedly connected to the booster pipe and the second booster chamber.

[0010] By adopting the above technical solution, the output end of the first drive motor passes through the middle of the stabilizing sleeve and is fixedly connected to the fan blades in the middle of the first pressurizing chamber and the conveying pipe, thereby pressurizing the internal foundation pit mud and improving the fluidity of the mud liquid.

[0011] Furthermore, a mud inlet is fixedly installed on the side of the booster pipe, and the outlet of the first booster chamber is fixedly connected to the inlet of the delivery pipe through a mud pipe.

[0012] By adopting the above technical solution, when the mud liquid enters the first pressurization chamber from the mud inlet, it will be pressurized by the centrifugal force of the liquid inside the first pressurization chamber and enter the conveying pipe from the mud pipe, and then be conveyed and discharged through the second pressurization chamber.

[0013] Furthermore, several mounting slots are fixedly installed at equal intervals on both sides of the relay pipe, several mounting pipes are fixedly installed at equal intervals on both sides of the processing pipe, the upper side of the guide pipe is fixedly connected to the mounting pipe, and the lower end of the guide pipe is fixedly connected to the mounting slot.

[0014] By adopting the above technical solution, the diversion pipe can dilute and depressurize the inside of the relay pipe when the internal pressure increases, thereby protecting the normal flow of mud inside the pipe.

[0015] Furthermore, the output end of the third drive motor is fixedly connected to the fan blade in the middle of the water pump, the upper end of the water pump is connected to the water pipe, and the output end of the water pump is connected to the pipe of the treatment pipe.

[0016] By adopting the above technical solution, the third drive motor can control the clean water pump to pressurize and pump clean water into the interior of the treatment pipe, thereby creating a stable liquid environment inside the treatment pipe.

[0017] Furthermore, a mounting bracket is fixedly installed at the lower end of the third drive motor, and a main control board is fixedly installed on the side of the mounting bracket.

[0018] By adopting the above technical solution, the main control board can control the corresponding third drive motor, electronically controlled switching valve, reset pressure relief valve and flow sensor, thereby forming overall control of the local area. At the same time, the main control board is connected to the main control power supply, which facilitates the regulation of the overall flow.

[0019] Furthermore, a booster base is fixedly installed at the lower end of the second drive motor, and a liquid outlet pipe is fixedly installed at the end of the relay pipe away from the booster component. A positioning column is fixedly installed at the lower end of the liquid outlet pipe and the connecting pipe.

[0020] By adopting the above technical solutions, the positioning column can increase the overall height of the pipeline, and the conveying base and pressurizing base can increase the height of the first drive motor and the second drive motor, making it convenient for the device to be erected.

[0021] Furthermore, the processing tube and the relay tube are fixedly connected by a support frame, and a recycling port is fixedly installed at the end of the processing tube away from the third drive motor, and the recycling port is connected to the recycling device.

[0022] By adopting the above technical solution, when the slurry liquid inside the relay pipe causes blockage and increases pressure, the liquid can be discharged through the recovery port to reduce pressure inside the outlet pipe.

[0023] Compared with the prior art, the advantages of this invention are: 1. In this invention, by setting a structure with a mud pressurization interface, the mud can be pressurized in a controlled manner during long-distance transportation of foundation pit mud, thereby improving the overall fluidity of the mud.

[0024] 2. In this invention, a relay pipe structure is used in the social structure. The relay pipe is set at the front end of the terrain such as bends or uphill slopes. When silt or other special locations are blocked, the pressure will be released through the reset pressure relief valve to release the subsequent silt. At the same time, the clean water pump will pump clean water into the relay pipe to dilute the silt, thereby reducing siltation and clearing the pipeline. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first pressurization chamber of the present invention; Figure 3 This is a schematic diagram of the relay tube structure of the present invention; Figure 4 This is a schematic diagram of the reset pressure relief valve of the present invention; Figure 5 This is a cross-sectional view of the relay tube structure of the present invention; Figure 6 This is a schematic diagram of the pressure relief flushing process of the present invention.

[0027] The following are the labeling instructions in the diagram: 1. First drive motor; 2. Conveying base; 3. Slurry inlet; 4. Pressurizing base; 5. Pressurizing component; 6. Connecting pipe; 7. Relay pipe; 8. Outlet pipe; 9. Delivery pipe; 10. Second drive motor; 11. Processing pipe; 1101. Installation pipe; 1102. Isolation plate; 12. Clean water pump; 13. Third drive motor; 14. First pressurizing chamber; 15. Conveying pipe; 16. Second pressurizing chamber; 17. Stabilizing sleeve; 18. Pressurizing pipe; 19. Slurry pipe; 20. Mounting frame; 2001. Main control board; 21. Positioning column; 22. Guide pipe; 23. Mounting groove; 24. Slurry pressurizing interface; 25. Recovery port; 26. Support frame; 27. Reset pressure relief valve; 2701. Electrically controlled switch valve; 2702. Flow sensor.

[0028] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figure 1 - Figure 6 As shown, the embodiment of the present invention provides: including a conveying base 2, a pressure boosting pipe 18 is provided on the side of the conveying base 2, a first pressure boosting chamber 14 is fixedly installed on the side of the pressure boosting pipe 18, a second pressure boosting chamber 16 is provided on the side of the first pressure boosting chamber 14, and an output pipe 9 is fixedly installed at the output end of the second pressure boosting chamber 16; A mud pressurization interface 24 is fixedly installed on the side of the delivery pipe 9. A pressurization component 5 is fixedly installed on the side of the mud pressurization interface 24. A second drive motor 10 is fixedly installed on the side of the pressurization component 5. A connecting pipe 6 is fixedly installed at the output end of the pressurization component 5. A relay pipe 7 is fixedly installed on the side of the connecting pipe 6. A processing pipe 11 is provided on the upper side of the relay pipe 7. A clean water pump 12 is fixedly installed on one side of the processing pipe 11. A third drive motor 13 is fixedly installed on the side of the clean water pump 12. The treatment pipe 11 and the relay pipe 7 are provided with several guide pipes 22 at equal intervals on both sides. An isolation plate 1102 is fixedly installed in the middle of the treatment pipe 11. An electric control switch valve 2701 is fixedly installed inside the guide pipe 22 on the side of the treatment pipe 11 close to the clean water pump 12. A reset pressure relief valve 27 is fixedly installed inside the guide pipe 22 on the side of the treatment pipe 11 away from the clean water pump 12. A stabilizing sleeve 17 is fixedly installed at the upper middle part of the conveying base 2. A first drive motor 1 is fixedly installed on one side of the stabilizing sleeve 17, and a booster pipe 18 is fixedly installed on the other side of the stabilizing sleeve 17. The output end of the first drive motor 1 is fixedly connected to the booster pipe 18 and the second booster chamber 16. The output end of the first drive motor 1 passes through the middle of the stabilizing sleeve 17 and is fixedly connected to the fan blades in the middle of the first booster chamber 14 and the conveying pipe 15, so as to boost the pressure of the foundation pit mud inside and improve the fluidity of the mud liquid. A mud inlet 3 is fixedly installed on the side of the booster pipe 18. The outlet end of the first booster chamber 14 and the inlet end of the delivery pipe 15 are fixedly connected through the mud pipe 19. When the mud liquid enters the interior of the first booster chamber 14 through the mud inlet 3, it will be centrifugally pressurized by the liquid inside the first booster chamber 14 and enter the interior of the delivery pipe 15 through the mud pipe 19. Then it will be transported and discharged through the second booster chamber 16. Several mounting slots 23 are fixedly installed at equal intervals on both sides of the relay pipe 7, and several mounting pipes 1101 are fixedly installed at equal intervals on both sides of the treatment pipe 11. The upper side of the guide pipe 22 is fixedly connected to the mounting pipe 1101, and the lower end of the guide pipe 22 is fixedly connected to the mounting slots 23. The guide pipe 22 can dilute and depressurize the inside of the relay pipe 7 when the internal pressure of the relay pipe 7 increases, thereby protecting the normal flow of mud inside the pipe. The output end of the third drive motor 13 is fixedly connected to the fan blade in the middle of the water pump 12. The upper end of the water pump 12 is connected to the water pipe. The output end of the water pump 12 is connected to the pipe of the treatment pipe 11. The third drive motor 13 can control the water pump 12 to pressurize and pump the water into the interior of the treatment pipe 11, thereby creating a stable liquid environment inside the treatment pipe 11. A mounting bracket 20 is fixedly installed at the lower end of the third drive motor 13, and a main control board 2001 is fixedly installed on the side of the mounting bracket 20. The main control board 2001 can control the third drive motor 13, the electric control switch valve 2701, the reset pressure relief valve 27 and the flow sensor 2702, thereby forming overall control of the local area. At the same time, the main control board 2001 is connected to the main control power supply, which facilitates the regulation of the overall flow. The lower end of the second drive motor 10 is fixedly installed with a booster base 4. The end of the relay pipe 7 away from the booster component 5 is fixedly installed with a liquid outlet pipe 8. The lower ends of the liquid outlet pipe 8 and the connecting pipe 6 are fixedly installed with positioning columns 21. The positioning columns 21 can raise the overall height of the pipeline. The conveying base 2 and the booster base 4 can raise the height of the first drive motor 1 and the second drive motor 10, making it convenient for the device to be erected. The processing pipe 11 and the relay pipe 7 are fixedly connected by a support frame 26. The end of the processing pipe 11 away from the third drive motor 13 is fixedly installed with a recovery port 25. The recovery port 25 is connected to the recovery device. When the mud liquid inside the relay pipe 7 forms a blockage and the pressure increases, the recovery port 25 can reduce the pressure inside the liquid outlet pipe 8 and discharge it.

[0031] Working principle of the invention: This device sets up a conveying base 2 and sets up several relay pipes 7 according to the terrain of long-distance conveying. The mud inlet 3 is connected to the mud discharge pipe. The mud flows from the mud inlet 3 into the first pressurizing chamber 14 on the side of the pressurizing pipe 18. The first drive motor 1 is installed on the conveying base 2. Its output end passes through the stabilizing sleeve 17 and is fixedly connected to the fan blade in the middle of the first pressurizing chamber 14 and the conveying pipe 15. The first drive motor 1 drives the fan blade to rotate, so that the liquid in the first pressurizing chamber 14 is centrifugally pressurized, and the mud is pressed into the conveying pipe 15 through the mud pipe 19. The mud flows in the conveying pipe 15 to the second pressurizing chamber 16. After being pressurized again, it is output through the delivery pipe 9. This initially ensures that the mud has a certain pressure and fluidity to meet the initial requirements of long-distance conveying. Its second pressurization chamber 16 is connected to the subsequent mud pressurization interface 24 through the delivery pipe 9. During long-distance transportation, the pressurization component 5 connected to the mud pressurization interface 24 on the side of the delivery pipe 9 is driven by the second drive motor 10 to pressurize the mud passing through here again, further improving the overall fluidity of the mud and ensuring that it maintains a good flow state during long-distance transportation, thus avoiding the deposition of internal solids due to the decrease in the flow speed of the mud over long distances, which would eventually lead to sludge blockage. The relay pipe 7 is installed at the front end of the pipeline where there may be bends or uphill sections that are prone to clogging. When the internal pressure of the relay pipe 7 increases due to sludge clogging, the pressure in the inner cavity increases. When the pressure exceeds the rated value of the reset pressure relief valves 27 on both sides, the reset pressure relief valves 27 on both sides will play a role in relieving the pressure of the subsequent sludge, preventing excessive pressure accumulation, and keeping the pressure within a safe value. The sludge clogged at the front can flow stably in the discharge direction, avoiding the rapid compaction and solidification of the sludge caused by excessive local pressure. The third drive motor 13 starts and drives the clean water pump 12 to pump clean water from the clean water pipe into the treatment pipe 11. The clean water flows into the relay pipe 7 through the guide pipes 22 connected to the relay pipe 7 on both sides of the treatment pipe 11, diluting the mud in it, reducing sludge blockage, clearing the pipe, and ensuring the normal flow of mud. The positioning column 21 raises the overall height of the pipeline, while the conveying base 2 and the booster base 4 raise the height of the first drive motor 1 and the second drive motor 10, respectively, so that the device can be reasonably erected on the construction site to adapt to different site conditions and pipeline layouts. Example 1: When only slight blockage occurs inside the pipeline, and the flow rate of the sludge at the blockage location is less than the pumping rate at the second pressurization chamber 16, the sludge inside can still flow. At this time, the pressure inside the pipeline increases. After the pressure rises to the rated value of the reset pressure relief valve 27, the reset pressure relief valve 27 is in a pressure relief state. The extra mud pumped into the second pressurization chamber 16 will be discharged through the reset pressure relief valve 27. Since the mud inside the outlet pipe 8 is in a flowing state, the difference between the discharged mud and the pumped mud is small. Therefore, the amount of mud that is depressurized from the reset pressure relief valve 27 is small and within a safe value. The mud at the blockage end will be gradually pushed, and eventually the blockage mud will be discharged. At this time, the pressure inside the relay pipe 7 returns to the standard level, the reset pressure relief valve 27 closes, and the device discharges the pit mud normally. Example 2: When the pipeline suddenly experiences rapid sludge buildup, and the sludge flow velocity at the blockage location is much lower than the pumping rate at the second pressurization chamber 16, the sludge moves slowly. At this time, the pressure inside the pipeline rises rapidly. Once the pressure reaches the rated value of the reset pressure relief valve 27, the reset pressure relief valve 27 is in a pressure-relieving state. The additional sludge pumped into the second pressurization chamber 16 will be discharged through the reset pressure relief valve 27. Because the sludge inside the outlet pipe 8 is squeezed and thus flows slowly, the discharged sludge... The difference between the pumped mud and the pressure relief valve 27 is large, so the amount of mud that is depressurized from the reset pressure relief valve 27 is large and at a dangerous level. Meanwhile, the mud discharge speed at the blockage end is slow. At this time, the flow sensor 2702 detects that the amount of depressurized mud is large. The main control board 2001 will control the third drive motor 13 and the electric control switch valve 2701 to start. At this time, clean water will be pumped into the inside of the outlet pipe 8 through the electric control switch valve 2701. The clean water can dilute the blockage mud and gradually restore the flow of the blockage mud. Simultaneously, the diluted liquid can be discharged from the reset pressure relief valve 27 until the silted mud resumes flow and is finally discharged. At this time, the pressure inside the relay pipe 7 returns to the standard level, the reset pressure relief valve 27, the third drive motor 13 and the electric control switch valve 2701 are closed, and the device normally discharges the foundation pit mud.

[0032] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A long-distance pumping and conveying device for foundation pit slurry, comprising a conveying base (2), characterized in that: The side of the conveying base (2) is provided with a booster pipe (18), the side of the booster pipe (18) is fixedly installed with a first booster chamber (14), the side of the first booster chamber (14) is provided with a second booster chamber (16), and the output end of the second booster chamber (16) is fixedly installed with an outlet pipe (9). A mud pressurization interface (24) is fixedly installed on the side of the delivery pipe (9). A pressurization component (5) is fixedly installed on the side of the mud pressurization interface (24). A second drive motor (10) is fixedly installed on the side of the pressurization component (5). A connecting pipe (6) is fixedly installed at the output end of the pressurization component (5). A relay pipe (7) is fixedly installed on the side of the connecting pipe (6). A processing pipe (11) is provided on the upper side of the relay pipe (7). A clean water pump (12) is fixedly installed on one side of the processing pipe (11). A third drive motor (13) is fixedly installed on the side of the clean water pump (12). The treatment pipe (11) and relay pipe (7) are provided with several guide pipes (22) at equal intervals on both sides. An isolation plate (1102) is fixedly installed in the middle of the treatment pipe (11). An electric control switch valve (2701) is fixedly installed inside the guide pipe (22) on the side of the treatment pipe (11) close to the clean water pump (12). A reset pressure relief valve (27) is fixedly installed inside the guide pipe (22) on the side of the treatment pipe (11) away from the clean water pump (12).

2. The long-distance pumping and conveying device for foundation pit slurry according to claim 1, characterized in that: A stabilizing sleeve (17) is fixedly installed at the middle of the upper end of the conveying base (2). A first drive motor (1) is fixedly installed on one side of the stabilizing sleeve (17), and a booster pipe (18) is fixedly installed on the other side of the stabilizing sleeve (17). The output end of the first drive motor (1) is fixedly connected to the booster pipe (18) and the second booster chamber (16).

3. The long-distance pumping and conveying device for foundation pit slurry according to claim 2, characterized in that: The side of the booster pipe (18) is fixedly installed with a mud inlet (3), and the outlet of the first booster chamber (14) and the inlet of the delivery pipe (15) are fixedly connected through a mud pipe (19).

4. The long-distance pumping and conveying device for foundation pit slurry according to claim 3, characterized in that: The relay pipe (7) has several mounting slots (23) fixedly installed at equal intervals on both sides, and the processing pipe (11) has several mounting pipes (1101) fixedly installed at equal intervals on both sides. The upper side of the guide pipe (22) is fixedly connected to the mounting pipe (1101), and the lower end of the guide pipe (22) is fixedly connected to the mounting slot (23).

5. The long-distance pumping and conveying device for foundation pit slurry according to claim 4, characterized in that: The output end of the third drive motor (13) is fixedly connected to the fan blade in the middle of the water pump (12), the upper end of the water pump (12) is connected to the water pipe, and the output end of the water pump (12) is connected to the pipe of the treatment pipe (11).

6. The long-distance pumping and conveying device for foundation pit slurry according to claim 5, characterized in that: The lower end of the third drive motor (13) is fixedly mounted with a mounting bracket (20), and the side of the mounting bracket (20) is fixedly mounted with a main control board (2001).

7. A long-distance pumping and conveying device for foundation pit slurry according to claim 6, characterized in that: The lower end of the second drive motor (10) is fixedly installed with a booster base (4), and the end of the relay pipe (7) away from the booster (5) is fixedly installed with a liquid outlet pipe (8). The lower ends of the liquid outlet pipe (8) and the connecting pipe (6) are fixedly installed with positioning columns (21).

8. The long-distance pumping and conveying device for foundation pit slurry according to claim 7, characterized in that: The processing tube (11) and the relay tube (7) are fixedly connected by a support frame (26). A recycling port (25) is fixedly installed at the end of the processing tube (11) away from the third drive motor (13). The recycling port (25) is connected to the recycling device.

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