Safe and efficient auxiliary stirring device in shield tunneling machine soil bin

Abstract

The utility model relates to the technical field of tunnel construction equipment, in particular to a safe and efficient auxiliary stirring device in a shield tunneling machine soil bin. After the fixed base is installed on the side face of the cutterhead panel, when the auxiliary stirring rod needs to be installed to stir slag stones in a bin, the auxiliary screw conveyor is assisted to discharge slag, only the single stirring rod needs to be installed and detached, and repeated use can be achieved; and the phenomenon of arching of muck and stones in the bin can be effectively avoided, the operation time of each time is one bin, the measures of welding and reinforcing stirring rods in other bins and the like are taken, no less than 25 bins are needed, and the bin opening operation time is greatly shortened compared with that of the prior art. The whole process is safe and efficient, the screw conveyor is normal after auxiliary muck stirring in the bin can be completed without inputting excessive resources, the problem of arching of muck and stones in the bin is effectively solved, the risk of long-time bin opening operation is reduced, and the bin opening cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction equipment, in particular to a safe and efficient auxiliary stirring device in a soil bin of a shield machine. Background Art

[0002] In recent years, with the increasing demand for transportation infrastructure construction in my country, a large number of tunnel projects have emerged, each of which is growing in scale, depth, and complexity. In tunnel projects involving soft upper and hard lower strata, rock strata, and cobblestone strata, soil silos are prone to accumulation, sinking, and arching, preventing the screw conveyor from discharging slag and hindering normal advancement. The silo opening process, in turn, results in lengthy opening times, low efficiency, and increased safety risks. This results in a significant waste of manpower, material, and financial resources, directly impacting the overall project progress.

[0003] Therefore, how to reduce the time of opening the warehouse to deal with the accumulation, sinking and arching of the warehouse, improve the efficiency of opening the warehouse, reduce the safety risks of long-term opening of the warehouse, ensure the normal excavation of the spiral machine, reduce the waste of manpower, financial resources and material resources, and ensure the safety of the opening operation is a problem that needs to be solved in tunnel construction.

[0004] Chinese patent publication number CN207776877U discloses a shield machine soil silo mixing device, belonging to the technical field of tunnel shield auxiliary devices. The device comprises a mixing device located in the lower middle portion of the shield machine cutterhead and a screw conveyor located within the shield machine soil silo. The mixing device includes a stirring rod and a driver for rotating the stirring rod. The stirring rod is equipped with a toothed toggle bar for stirring the soil in the soil silo. The main axis of the screw conveyor is at an angle of 29° to the horizontal plane. This device requires the installation of an additional drive mechanism, making the device complex and difficult to install. Therefore, it is urgent for those skilled in the art to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of accumulation, sinking and arching in the soil bin caused by insufficient stirring of the stirring rod in the soil bin, which in turn causes the spiral machine to be unable to discharge slag normally and requires a long time to open the bin to deal with the problems of accumulation, sinking and arching in the bin, thereby achieving the purpose of reducing the opening time, improving the efficiency of the opening operation, ensuring the safety of the opening operation and reducing the construction cost.

[0006] Therefore, a safe and efficient auxiliary stirring device in the soil bin of a shield machine is provided, which includes a base welded and reinforced on the side of the cutter head panel, a stirring rod installed on the base, and limited high-strength bolts on the stirring rod and at the base, wherein the installation angle of the stirring rod is controlled at 10°-12°, and the stirring rod rotates with the rotation of the cutter head, which can assist in fully stirring the accumulated soil and stones at the bottom of the soil bin and the gate of the screw machine, thereby facilitating normal slag discharge of the screw machine.

[0007] By adopting the above technical solution, the accumulated soil and stones at the bottom of the soil bin and at the gate of the screw machine are fully stirred, ensuring that the screw machine can discharge the debris more smoothly, reducing downtime caused by accumulated soil or stones. Traditional solutions may require frequent opening of the bin to clean up the accumulated soil and stones, but this auxiliary stirring device can help maintain normal operations without additional opening of the bin, thereby greatly reducing the opening frequency. By reducing unnecessary bin opening operations and improving work efficiency, a large amount of manpower, material and financial resources can be saved overall, thereby reducing construction costs. Frequent bin opening operations increase the safety risks of workers. By using this auxiliary stirring device, these risks can be significantly reduced and the safety of construction workers can be guaranteed. The stirring rod is designed to be detachable, easy to replace and maintain, and can be reused many times, further extending the service life of the equipment while reducing the generation of waste.

[0008] Furthermore, the base is welded and fixed on the side of the cutter head panel, 44cm-46cm away from the inner wall of the soil bin, and the length of the base is 35cm, the width is 25cm, and the height is 25cm.

[0009] By adopting the above technical solution, the size and position of the base ensures it can be securely mounted on the cutterhead while maintaining sufficient strength to support the stirring rod. This helps improve the operating stability of the entire device and reduces the risk of damage due to vibration or impact. Positioning the base 44-46 cm from the inner wall of the soil bin ensures that the stirring rod has sufficient working space to stir the soil while avoiding interference with the inner wall or other components. This layout ensures both operational efficiency and maximizes space utilization. The moderate size of the base makes the stirring rod relatively easy to install and remove. When the stirring rod needs to be replaced or repaired, technicians can easily perform the operation, reducing downtime and improving work efficiency. Using appropriate materials and welding techniques, the base can withstand the various loads encountered during shield operation, including torque and shear forces, thereby extending the service life of the entire device. The base design takes into account the impact on the overall performance of the cutterhead, ensuring that it does not interfere with the cutterhead's primary functions, such as excavation efficiency and cutting capacity. This adds auxiliary functions while maintaining the original working performance of the cutterhead.

[0010] Furthermore, a mounting hole with a diameter of 16 cm is provided in the middle of the base for mounting the stirring rod.

[0011] The 16cm diameter mounting hole ensures the stirring rod can be accurately positioned, which is crucial for maintaining the correct stirring angle (10°-12°). This helps ensure the stirring rod effectively mixes the soil at the bottom of the soil bin and at the screw conveyor gate. The appropriately sized mounting hole provides sufficient support, preventing the stirring rod from excessive deformation or damage during operation. It also allows the use of appropriately positioned high-strength bolts to secure the stirring rod, further enhancing the stability of the entire device. The 16cm diameter hole facilitates insertion and removal of the stirring rod and simplifies maintenance. When the stirring rod needs to be replaced or repaired, technicians can easily operate it, reducing downtime. The precise mounting hole design allows the stirring rod to operate in the most effective position, improving mixing efficiency, facilitating the rapid removal of accumulated soil and rocks, and enabling smoother soil discharge from the screw conveyor. The optimal hole diameter avoids excessive stress concentration points, extending the service life of the base and stirring rod. This design also reduces wear caused by vibration, enhancing the durability of the device.

[0012] Furthermore, the stirring rod is made of a steel bar with a diameter of 15 cm and a length of 1.05 m.

[0013] By adopting the above technical solution, the use of 15cm diameter steel bars as stirring rods provides sufficient strength to withstand the impact of soil and rocks within the silo. This steel bar size effectively resists bending, twisting, and other forms of mechanical stress, ensuring a long service life. The 1.05m length allows the stirring rods to cover a large working area, ensuring adequate mixing of the soil at the bottom of the silo and at the auger gate. This length also facilitates installation on the base without affecting the proper operation of the cutterhead or interfering with other components. The 15cm diameter stirring rods provide ample surface area for more effective stirring of the material within the silo. As they rotate with the cutterhead, they produce a strong stirring action, helping to break down the bonds between accumulated soil and rocks, facilitating easier discharge of the soil through the auger. Since the steel bars are standard in size, replacement is readily available on the market. Furthermore, stirring rods of this size are relatively easy to remove and reinstall, facilitating regular inspection and maintenance. Using common steel bar materials is generally more economical than customizing special shapes or using expensive alloys. This not only reduces initial investment costs, but also reduces replacement and maintenance costs in long-term operation.

[0014] Furthermore, the limiting high-strength bolt is M33 with a strength grade of 8.8, and is installed on the stirring rod and the base.

[0015] By adopting the above technical solution, the 8.8-grade high-strength bolts have high tensile strength and yield strength and can withstand greater mechanical stress. Bolts of this grade are usually used in applications that require high-strength connections, ensuring that the stirring rod will not loosen or fall off due to vibration or impact during operation. The M33-sized bolts have a larger diameter and provide sufficient contact area to tighten the stirring rod. This design can effectively prevent the stirring rod from moving or offsetting during rotation, thereby ensuring the stability and reliability of the mixing operation. The high-strength bolts are designed with safety in mind and can maintain structural integrity even under extreme conditions. This helps reduce the safety risks caused by the accidental fall of the stirring rod, protects the safety of construction personnel and equipment, and uses standard-sized high-strength bolts to simplify the maintenance process. If the bolts need to be replaced or tightened, technicians can easily find the appropriate tools and spare parts to perform the operation, reducing downtime.

[0016] Beneficial effects of the utility model:

[0017] The utility model installs a base on the side of the cutter head panel, and when an auxiliary stirring rod is installed to stir the slag and stone in the bin, the auxiliary spiral machine can be used to discharge the slag. Only a single stirring rod needs to be installed and removed, and it can be reused. It can effectively solve the arching problem of slag and stone in the bin. Each operation time is 1 bin (5 hours / bin). Other measures such as welding and reinforcing the stirring rod in the bin require no less than 25 bins (5 hours / bin). In comparison, the bin opening operation time is greatly shortened. The whole process is safe and efficient. After the auxiliary stirring of the slag in the bin is completed, the spiral machine can operate normally without investing too many resources, effectively solving the arching problem of slag and stone in the bin, reducing the risk of long-term bin opening operation, and saving bin opening cost.

[0018] The utility model adopts steel bars with a diameter of 15 cm and a length of 1.05 m as the stirring rod material, combined with M33 and 8.8 grade limit high-strength bolts, to ensure the high strength and durability of the device, extend the service life, reduce maintenance costs, make the stirring rod reusable, reduce the replacement frequency, further save material costs, and significantly reduce the consumption of manpower, material and financial resources by reducing unnecessary opening operations, thereby achieving effective utilization of resources;

[0019] The utility model is fixed to the side of the cutterhead panel by base welding, 44cm-46cm away from the inner wall of the soil bin, with specific dimensions (length 35cm, width 25cm, height 25cm), and is provided with a mounting hole with a diameter of 16cm, which ensures the accurate installation and firm support of the stirring rod, and is convenient for installation and disassembly without affecting the normal performance of the cutterhead. The device is suitable for tunnel projects under various geological conditions, and can effectively play a role in both soft soil and hard rock layers, showing good adaptability and flexibility, and meeting the needs of different construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0021] Figure 1 It is the main view of the present utility model.

[0022] Figure 2 It is a top view of the present utility model.

[0023] Figure 3 It is the main view of the utility model located on the cutter head.

[0024] Figure 4 It is a side view of the utility model located on the cutter head.

[0025] In the picture:

[0026] 1-base; 2-stirring rod; 3-limiting high-strength bolt. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] like Figures 1 to 4As shown, a safe and efficient auxiliary stirring device for the soil bin of a shield machine is provided. The base 1 is fixed to the side of the shield machine cutter head panel by welding, 45 cm away from the inner wall of the soil bin. Such positioning ensures that the stirring rod 2 can effectively cover the bottom of the soil bin and the area at the screw machine gate. The specific dimensions of the base 1 are 35 cm in length, 25 cm in width, and 25 cm in height. These dimensions have been carefully designed to ensure the stability of the structure and sufficient supporting force. A mounting hole with a diameter of 16 cm is provided in the middle of the base 1. This hole is used to install the stirring rod 2, ensuring that the stirring rod 2 can be accurately positioned and has enough space for rotation. The stirring rod 2 is made of steel bars with a diameter of 15 cm and a length of 1.05 m. This size provides sufficient strength and rigidity to withstand the harsh environment within the soil bin. The stirring rod 2 is secured through mounting holes in the base 1 at a 12° angle, which helps the stirring rod 2 effectively stir accumulated soil and rocks at the bottom of the soil bin and at the screw gate as it rotates with the cutterhead. The stirring rod 2 rotates naturally with the cutterhead, requiring no additional power, simplifying the equipment structure and improving mixing efficiency. The stopper bolt 3 is an M33, 8.8-grade high-strength bolt. This grade of bolt has high tensile and yield strength, and can withstand high mechanical stress. The stopper bolt 3 is installed on the stirring rod 2 and the base 1 to secure the stirring rod 2, preventing it from moving or falling off during operation. The stopper bolt 3 provides a reliable fastening effect, ensuring that the stirring rod 2 remains stable during high-speed rotation, preventing loosening or damage due to vibration or impact. Through such a connection relationship, the base 1 provides a solid foundation for the entire device. The stirring rod 2 is inserted and fixed through the mounting hole in the middle of the base 1 to ensure that it works at the correct angle, and the limiting high-strength bolt 3 firmly fixes the stirring rod 2 to the base 1 to prevent it from any movement or falling off during operation.

[0030] Working principle:

[0031] During tunneling, the cutterhead rotates continuously, driving the agitator rods 2 mounted on it. These rods stir the soil at the bottom of the soil bin and at the screw conveyor gate at a 10° angle, loosening the accumulated soil and rocks. This loosened soil is then more easily discharged by the screw conveyor, reducing downtime caused by soil accumulation and improving construction efficiency. High-strength stopper bolts 3 prevent the agitator rods 2 from moving or falling out during rotation, ensuring the safety and stability of the entire device. After installing the fixed base 1 on the side of the cutterhead panel, the agitator rods 2 can be installed to mix the soil and rocks in the bin and assist the screw conveyor in discharging the slag. Only a single agitator rod 2 needs to be installed and removed, making it reusable. This effectively prevents the arching of soil and rocks within the bin. Each operation lasts for one bin (5 hours per bin). Other measures, such as welding and reinforcing the agitator rods 2 within the bin, require at least 25 bins (5 hours per bin), significantly reducing bin opening time. The entire process is safe and efficient. It does not require excessive resources to complete the auxiliary mixing of the slag in the silo and the screw machine operates normally, effectively solving the problem of arching of slag and stones in the silo, reducing the risk of long-term silo opening operations and saving silo opening costs.

[0032] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting but are provided for ease of description only.

Claims

1. A safe and efficient shield machine soil bunker auxiliary stirring device, characterized in that: The invention comprises a base (1) welded and reinforced on the side of the cutter head panel, a stirring rod (2) installed on the base (1), and a limiting high-strength bolt (3) on the stirring rod (2) and at the base (1), wherein the installation angle of the stirring rod (2) is controlled to be 10°-12°, and the stirring rod (2) rotates with the rotation of the cutter head, and can assist in fully stirring the accumulated soil and stones at the bottom of the soil bin and the gate of the screw machine, so as to facilitate the normal slag discharge of the screw machine.

2. A safe and efficient shield machine soil bunker auxiliary stirring device as claimed in claim 1, characterized in that: The base (1) is welded and fixed on the side of the cutter head panel, 44 cm to 46 cm away from the inner wall of the soil bin, and the length of the base (1) is 35 cm, the width is 25 cm, and the height is 25 cm.

3. A safe and efficient shield machine soil bunker auxiliary stirring device as claimed in claim 2, characterized in that: A mounting hole with a diameter of 16 cm is provided in the middle of the base (1) for mounting the stirring rod (2).

4. A safe and efficient shield machine soil bunker auxiliary stirring device as claimed in claim 2, characterized in that: The stirring rod (2) is made of a steel bar with a diameter of 15 cm and a length of 1.05 m.

5. A safe and efficient shield machine soil bunker auxiliary stirring device as claimed in claim 4, characterized in that: The limiting high-strength bolt (3) is of M33, with a strength grade of 8.8, and is installed on the stirring rod (2) and the base (1).

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