A mixing device and control system of an earth pressure balance shield machine based on civil engineering

Abstract

The invention relates to the field of mixing equipment, and discloses a mixing device and control system of an earth pressure balance shield machine based on civil engineering, comprising a shield machine cutterhead and a conveying soil bin installed on the shield machine, wherein the conveying soil bin is arranged in the shield machine cutterhead and is connected with a conduit so as to convey the excavated mixture through the conduit. In the invention, when the shield machine cutterhead rotates during the excavation process, the mixing blade will rotate accordingly, and the soil mixture entering the shield machine cutterhead will be initially mixed and crushed. The crushing component not only has a crushing function, but also has a rotation direction opposite to that of the shield machine cutterhead. When the mixture passes through the channel of the crushing component, larger gravel pieces will be further crushed into smaller particles, so that they can be smoothly discharged through the conveying soil bin and the conduit, thereby avoiding the long-term accumulation of sand and gravel in the soil bin, affecting the subsequent transmission of mud, sand, gravel, etc., thereby causing the problem of being unable to quickly adjust the earth pressure balance.

Description

Technical Field

[0001] The invention relates to the field of stirring devices, in particular to a stirring device and a control system of an earth pressure balance shield machine based on civil engineering. Background Art

[0002] A shield machine is a type of equipment used in civil engineering construction, mainly used in the construction of formed tunnels, etc. After the shield machine cutterhead crushes the soil and sends it into the soil bin, a large amount of gravel will be mixed in the soil, and the gravel cannot be mixed with the mud to form a fluid. Due to the large gravity volume of the gravel, when the shield machine is working, the conduit used to transmit the mixture is directly connected to the soil transmission hole, and the mud, water, sand and gravel will be transmitted along the soil transmission hole, but some of the gravel mixed in the mixture is large in volume and cannot be effectively transmitted and discharged. If this continues for a long time, it is easy to cause blockage inside, affecting the transmission and discharge of mud, water and small volume of sand and gravel, and the problem of unable to quickly adjust the earth pressure balance. Summary of the invention

[0003] The present invention provides a stirring device and a control system for an earth pressure balance shield machine based on civil engineering, which overcomes the shortcomings described in the background technology.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A soil pressure balance shield machine mixing device based on civil engineering, comprising a shield machine cutterhead installed on the shield machine and a conveying soil bin, the conveying soil bin is arranged in the shield machine cutterhead and connected with a conduit, so as to convey the excavated mixture through the conduit, a cavity one is provided between the conveying soil bin and the inner end of the shield machine cutterhead, a crushing assembly is arranged in the cavity one, a channel for the mixture to pass through is arranged in the middle of the crushing assembly, a crushing head and a conveying port are arranged at the end of the shield machine cutterhead, the conveying port is connected with the conveying soil bin through the channel, a stirring knife is arranged in an array on one side of the shield machine cutterhead close to the crushing assembly, and all the stirring knives extend toward the middle of the channel;

[0006] The crushing assembly extends into the soil conveying bin, and the rotation direction of the crushing assembly is opposite to the rotation direction of the shield machine cutter head.

[0007] A preferred technical solution, the crushing assembly includes a motor, a gear plate, and a rotating separation tube. The rotating separation tube has a plurality of teeth in a rotating array on one side away from the mixing blade, and the gear plate meshes with the teeth. The motor and the gear plate form a belt drive, so that the motor drives the gear plate to mesh and drive the rotating separation tube to rotate;

[0008] A limiting protrusion protruding outward is arranged in the middle of the peripheral surface of the rotating separation pipe, and a guide rail corresponding to the limiting protrusion is arranged in the cutter head of the shield machine, and the limiting protrusion is embedded in the guide rail.

[0009] A preferred technical solution is that a separation bucket is provided at the end of the rotating separation tube away from the motor, the surface of the separation bucket gradually deepens from the edge to the middle, and a strip opening, a circular opening 1, and a circular opening 2 are sequentially provided on the surface of the separation bucket from the edge to the middle, and the strip opening and the circular opening 1 are both arranged in a circular array;

[0010] The strip-shaped opening is a strip-shaped structure, the circular opening 1 and the circular opening 2 are both circular structures, the inner diameter of the circular opening 1 is smaller than the inner diameter of the circular opening 2, the inner diameter of the circular opening 1 is larger than the width of the strip-shaped opening, and the circular opening 2 is located in the middle of the separation bucket;

[0011] The middle part of the separation bucket extends into the conveying soil bin.

[0012] A preferred technical solution, the soil conveying bin comprises a main body, a connecting shell 1, and a connecting shell 2, the connecting shell 2 is connected to the main body through the connecting shell 1, the connecting shell 2 is arranged at one end of the connecting shell 1 close to the rotating separation pipe, the connecting shell 1 and the connecting shell 2 are both flared structures, a large-diameter end of the connecting shell is connected to a large-diameter end of the connecting shell 2, and the separation bucket extends into the connecting shell 2;

[0013] The rotating array outside the connecting shell 2 has multiple strip-shaped crushing pieces, and there is a spacing between two adjacent strip-shaped crushing pieces. A cavity 2 is formed between the outside of the connecting shell 2 and the rotating separation tube. The surface of the connecting shell 2 is provided with multiple filter holes for filtering sand and gravel, and the filter holes are connected to the cavity 2.

[0014] A preferred technical solution, wherein the circular opening 1 is arranged on the surface of the separation bucket placed in the connecting shell 2, and the strip opening is arranged on the surface of the separation bucket not placed in the connecting shell 2. When the mixture moves into the rotating separation tube and passes through the strip opening, it will fall into the cavity 2. When the mixture moves into the rotating separation tube and passes through the circular opening 1 or the circular opening 2, it will directly fall into the connecting shell 1.

[0015] A control system for a stirring device of an earth pressure balance shield machine based on intelligent construction is applied to the stirring device of an earth pressure balance shield machine based on intelligent construction. The control system includes a control module for controlling the rotation of a rotating separation pipe. The control module consists of a motor and a gear plate, so as to change the speed ratio of the rotating separation pipe and the shield machine cutter disc during rotation by controlling the speed of the gear plate, and stir and crush large-volume stones through a stirring knife during the rotation of the shield machine cutter disc.

[0016] Compared with the prior art, this technical solution has the following advantages:

[0017] The stirring blade array in the present invention is located on one side of the shield machine cutter disc close to the crushing assembly and extends toward the middle of the channel. This means that when the shield machine cutter disc rotates during excavation, the stirring blade will rotate accordingly to perform preliminary stirring and crushing on the soil mixture entering the shield machine cutter disc. The crushing assembly is located in a cavity between the conveying soil bin and the inner end of the shield machine cutter disc, and a channel for the mixture to pass through is provided in the middle. This crushing assembly not only has a crushing function, but also has a rotation direction opposite to that of the shield machine cutter disc. Such a design can further enhance the crushing effect of gravel. When the mixture passes through the channel of the crushing assembly, larger gravel will be further crushed into smaller particles, so that it can be discharged smoothly through the conveying soil bin and the conduit, avoiding the long-term accumulation of sand and gravel in the soil bin, affecting the subsequent transmission of mud, sand, gravel, etc., thereby causing the problem of being unable to quickly adjust the earth pressure balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 This is an overall diagram of the present invention.

[0020] Figure 2 for Figure 1 Half-section diagram of .

[0021] Figure 3 for Figure 1 Schematic diagram of the decomposition.

[0022] Figure 4 for Figure 3 A front view schematic diagram of .

[0023] Figure 5 for Figure 3 Half-section diagram of .

[0024] Figure 6 This is a half-section schematic diagram of the shield machine cutterhead.

[0025] Figure 7 It is a schematic diagram of the structure of the crushing component.

[0026] Figure 8 This is a schematic diagram of the soil storage bin.

[0027] Fig. 9 for Figure 1 Schematic diagram of the internal structure.

[0028] In the figure: shield machine cutter head 1, crushing head 11, transmission port 12, mixing knife 13, guide rail 14;

[0029] Conveying soil bin 2, main pipe body 21, connecting shell 1 22, connecting shell 2 23, strip crushing piece 231;

[0030] The crushing assembly 3 , the motor 31 , the gear plate 32 , the rotating separation tube 33 , the strip-shaped opening 331 , the circular opening 1 332 , the circular opening 2 333 , and the limiting protrusion 334 . DETAILED DESCRIPTION

[0031] like Figures 1 to 9 As shown, the present invention proposes a stirring device for an earth pressure balance shield machine based on civil engineering, comprising a shield machine cutterhead 1 installed on a shield machine and a conveying soil bin 2, wherein the conveying soil bin 2 is arranged in the shield machine cutterhead 1 and is connected with a conduit so as to convey the excavated mixture through the conduit, and is characterized in that a cavity 1 is provided between the conveying soil bin 2 and the inner end of the shield machine cutterhead 1, a crushing assembly 3 is provided in the cavity 1, a channel for the mixture to pass through is provided in the middle of the crushing assembly 3, a crushing head 11 and a conveying port 12 are provided at the end of the shield machine cutterhead 1, and the conveying port 12 is connected with the conveying soil bin 2 through a channel, and a stirring knife 13 is arranged in an array on one side of the shield machine cutterhead 1 close to the crushing assembly 3, and all the stirring knives 13 extend toward the middle of the channel;

[0032] The crushing assembly 3 extends into the soil conveying bin 2, and the rotation direction of the crushing assembly 3 is opposite to the rotation direction of the shield machine cutter head 1;

[0033] First of all, the setting of the mixing blades 13 is a key link. These mixing blades 13 are arranged in an array on one side of the shield machine cutter head 1 close to the crushing assembly 3, and all extend toward the middle of the channel. This means that when the shield machine cutter head 1 rotates during excavation, the mixing blades 13 will rotate accordingly, and the soil mixture entering the shield machine cutter head 1 will be initially mixed and crushed. This design helps to initially break down larger gravel into smaller particles in preparation for subsequent processing. Next, the setting of the conveying soil bin 2 ensures that the excavated mixture can be smoothly transmitted. It is connected to the shield machine cutter head 1 and communicated with the conduit to form a smooth transmission channel. However, only It is not enough to rely on the transmission capacity of the conveying soil bin 2, because there may still be some larger gravel blocks that cannot be discharged smoothly through the conduit. At this time, the role of the crushing component 3 is particularly important. It is located in a cavity between the conveying soil bin 2 and the inner end of the shield machine cutter disc 1, and a channel for the mixture to pass through is provided in the middle. This crushing component 3 not only has a crushing function, but also its rotation direction is opposite to that of the shield machine cutter disc 1. Such a design can further enhance the crushing effect of the gravel blocks. When the mixture passes through the channel of the crushing component 3, the larger gravel blocks will be further crushed into smaller particles, so that they can be discharged smoothly through the conveying soil bin 2 and the conduit.

[0034] Furthermore, the crushing assembly 3 includes a motor 31, a gear plate 32, and a rotating separation tube 33. The rotating separation tube 33 has a plurality of teeth in a rotating array on a side away from the mixing blade 13, and the gear plate 32 is meshed with the teeth. The motor 31 and the gear plate 32 form a belt drive, so that the motor 31 drives the gear plate 32 to mesh and drive the rotating separation tube 33 to rotate;

[0035] A limiting protrusion 334 protruding outward is provided in the middle of the circumference of the rotating separation tube 33, and a corresponding guide rail 14 is provided in the shield machine cutter head 1, and the limiting protrusion 334 is embedded in the guide rail 14. The design of the rotating separation tube 33 not only takes into account the crushing function, but also pays attention to stability. When the rotating separation tube 33 rotates, the limiting protrusion 334 will be embedded in the guide rail 14. Such a design not only limits the rotation trajectory of the rotating separation tube 33 and prevents it from deviating from the predetermined position due to uneven force, but also enhances the stability of the rotating separation tube 33 during the rotation process, so that it can more effectively crush the gravel in the mixture.

[0036] The end of the rotating separation tube 33 away from the motor 31 is provided with a separation bucket, the surface of the separation bucket gradually deepens from the edge to the middle, and the surface of the separation bucket is sequentially provided with a strip opening 331, a circular opening 1 332, and a circular opening 2 333 from the edge to the middle, and the strip opening 331 and the circular opening 1 332 are both arranged in a circular array;

[0037] The strip opening 331 is a strip structure, and the circular opening 1 332 and the circular opening 2 333 are both circular structures. The inner diameter of the circular opening 1 332 is smaller than the inner diameter of the circular opening 2 333, and the inner diameter of the circular opening 1 332 is larger than the width of the strip opening 331. The circular opening 2 333 is located in the middle of the separation bucket, and the middle of the separation bucket extends into the conveying soil bin 2. The circular opening 1 332 is arranged on the surface of the separation bucket placed in the connecting shell 23, and the strip opening 331 is arranged on the surface of the separation bucket not placed in the connecting shell 23. When the mixture moves into the rotating separation tube 33 and passes through the strip opening 331, it will fall into the cavity 2. When the mixture moves into the rotating separation tube 33 and passes through the circular opening 1 332 or the circular opening 2 333, it will directly fall into the connecting shell 1 22.

[0038] In further refining the crushing assembly 3 of the earth pressure balance shield machine mixing device based on intelligent construction proposed in the present invention, the separation bucket arranged at the end of the rotating separation tube 33 away from the motor 31 plays a key role. The design of the separation bucket surface, especially the strip opening 331, the circular opening 1 332 and the circular opening 2 333, is intended to achieve effective separation and transmission of particles of different sizes.

[0039] The strip openings 331 are arranged in a strip structure and are arranged in a circular array at a shallow position from the edge to the middle of the separation bucket surface. When the mixture is transferred into the rotating separation tube 33 and passes through the strip openings 331, due to the moderate width of these openings, smaller particles such as muddy water and fine sand and gravel can pass smoothly, while larger particles such as gravel will be blocked and continue to rotate with the rotating separation tube 33. In this way, the strip openings 331 play a role in preliminary screening and separation, allowing smaller particles to fall into the cavity 2. Assuming that the cavity 2 is the space below or around the separation bucket, it is used to collect these particles and provide convenience for subsequent processing.

[0040] The circular opening 1 332 and the circular opening 2 333 are both set as circular structures and are located at a deeper position from the edge to the middle of the separation bucket surface. The inner diameter of the circular opening 1 332 is smaller than the inner diameter of the circular opening 2 333, but larger than the width of the strip opening 331. Such a design allows, as the mixture continues to rotate with the rotating separation tube 33 and approaches the middle of the separation bucket, larger particles such as larger gravel blocks that still exist after preliminary screening will pass through the circular opening 1 332 and the circular opening 2 333 in sequence. Since the inner diameter of the circular opening 1 332 is smaller, it can further block those still larger particles and allow slightly smaller particles to pass through. The circular opening 2 333, because it has the largest inner diameter, can allow all remaining particles, including larger but relatively smaller particles that still exist after further screening, to pass through.

[0041] It is worth noting that the circular opening 1 332 is arranged on the surface of the separation bucket placed in the conveying soil bin 2, and the strip opening 331 is arranged on the surface of the separation bucket not placed in the conveying soil bin 2, which means that when the mixture moves into the rotating separation tube 33 and passes through the strip opening 331, they will fall into the cavity 2; and when the mixture moves into the rotating separation tube 33 and passes through the circular opening 1 332 or the circular opening 2 333, since these openings are directly located in the conveying soil bin 2, they will directly fall into the conveying soil bin 2 for further transmission and processing. When the mixture is conveyed into the rotating separation tube 33, it will first pass through the strip opening 331, the circular opening 1 332 and the circular opening 333 on the surface of the separation bucket. The second 333 performs preliminary screening, and larger stones will be blocked in the separation bucket, while smaller particles will fall into cavity two or other collection areas through these openings. However, for those stones that remain in the separation bucket and are still relatively large after preliminary screening, the rotating separation tube 33 will cooperate with the stirring knife 13. Due to the rotation of the rotating separation tube 33, these stones will be subjected to certain extrusion and shear forces. At the same time, the rotation of the stirring knife 13 will also cut and crush these stones. This cooperation mechanism can effectively further crush larger stones into smaller particles. Once the stones are crushed into smaller particles, they will fall into cavity two as the rotating separation tube 33 rotates.

[0042] Furthermore, the conveying soil bin 2 includes a main body 21, a connecting shell 1 22, and a connecting shell 23. The connecting shell 23 is connected to the main body 21 through the connecting shell 1 22. The connecting shell 23 is arranged at one end of the connecting shell 1 22 close to the rotating separation tube 33. The connecting shell 1 22 and the connecting shell 2 23 are both flared structures. The large-diameter end of the connecting shell 1 22 is connected to the large-diameter end of the connecting shell 23. The separation bucket extends into the connecting shell 23. The outer rotating array of the connecting shell 23 has a plurality of strip-shaped crushing pieces 231. There is a spacing between two adjacent strip-shaped crushing pieces 231. A cavity 2 is formed between the outer side of the connecting shell 23 and the rotating separation tube 33. A plurality of filter holes for filtering sand and gravel are arranged on the surface of the connecting shell 23, and the filter holes are connected to the cavity 2.

[0043] In further refining the design of the conveying soil bin 2 of the earth pressure balance shield machine mixing device based on intelligent construction proposed by the present invention, the design of the second cavity and its coordination with the filter holes and the strip crushing pieces 231 provide an efficient solution for the screening of particles such as crushed stone and gravel and the crushing of larger stones. First, the second cavity is located between the connecting shell 23 and the rotating separation tube 33. Its special design makes it a key particle processing area. There are multiple strip crushing pieces 231 in the rotating array outside the connecting shell 23. These crushing pieces not only enhance the robustness of the structure, but more importantly, when the rotating separation tube 33 rotates, they will produce friction and collision with the stones therein. , thereby achieving further crushing of larger stones. There is a spacing between two adjacent strip-shaped crushing pieces 231. This design not only ensures the crushing effect, but also avoids excessive wear and blockage. At the same time, a plurality of filter holes for filtering sand and gravel are arranged on the surface of the connecting shell 23. These filter holes are connected with the cavity 2, so that when the mixture passes through, smaller sand and gravel particles can smoothly pass through these pores and fall into the cavity 2, while larger stones will be blocked in the connecting shell 23 and continue to be crushed by the strip-shaped crushing pieces 231. This design not only improves the screening efficiency, but also ensures that larger stones can be effectively crushed, avoiding blockage of subsequent transmission and processing systems. Example

[0044] In this embodiment, a control system for a mixing device of an earth pressure balance shield machine based on intelligent construction is proposed. The control system is applied to the mixing device of an earth pressure balance shield machine based on intelligent construction. The control system includes a control module for controlling the rotation of a rotating separation tube 33. The control module is composed of a motor 31 and a gear plate 32, so as to change the speed ratio of the rotating separation tube 33 and the shield machine cutter head 1 during rotation by controlling the speed of the gear plate 32, and stir and crush large-volume stones through the stirring blade 13 during the rotation of the shield machine cutter head 1;

[0045] Based on the above description, the design in this embodiment not only allows the operator to change the speed ratio between the rotating separation tube 33 and the shield machine cutter head 1 by adjusting the speed of the gear plate 32, but also ensures that during the rotation of the shield machine cutter head 1, the mixing blade 13 can effectively mix and crush stones with larger mass and volume.

[0046] Adjusting the speed ratio between the rotating separation tube 33 and the shield machine cutter head 1 is actually optimizing the process of crushing stones. When the shield machine cutter head 1 rotates at a constant speed, if the speed of the rotating separation tube 33 is increased, the relative speed between the two will increase. This speed difference will cause the collision frequency and force of stones between the two to increase significantly, thereby accelerating the crushing efficiency of stones. On the contrary, if the speed of the rotating separation tube 33 is reduced, unnecessary wear can be reduced. At the same time, for particularly hard or large-sized stones, more thorough crushing can be achieved by extending the crushing time.

[0047] In the process of adjusting the speed ratio, the control system must also ensure the overall stable operation of the shield machine. This requires the control system to have an accurate monitoring and feedback mechanism that can monitor key parameters such as the speed, torque, and temperature of the shield machine cutter head 1 and the rotating separation tube 33 in real time. Once an abnormality is found, such as excessive speed fluctuations, excessive temperature, or torque exceeding the safe range, the system should respond immediately by adjusting the output power of the motor 31 or taking other measures to restore the stable state.

[0048] In addition, the control system can also intelligently adjust the speed ratio according to the hardness and size distribution of the rocks. For example, when facing a large number of hard rocks, the system can automatically increase the speed ratio to enhance the crushing ability; when there are fewer or softer rocks, the speed ratio will be reduced to reduce energy consumption and wear.

[0049] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A mixing device for an earth pressure balance shield machine based on civil engineering, comprising a shield machine cutterhead (1) installed on the shield machine and a conveying soil bin (2), wherein the conveying soil bin (2) is arranged in the shield machine cutterhead (1) and is connected to a conduit so as to convey the excavated mixture through the conduit, characterized in that: A cavity is provided between the conveying soil bin (2) and the inner end of the shield machine cutter disc (1), a crushing assembly (3) is provided in the cavity, a passage for the mixture to pass through is provided in the middle of the crushing assembly (3), a crushing head (11) and a conveying port (12) are provided at the end of the shield machine cutter disc (1), the conveying port (12) is connected to the conveying soil bin (2) through the passage, and a stirring knife (13) is arranged in an array on one side of the shield machine cutter disc (1) close to the crushing assembly (3), and all the stirring knives (13) extend toward the middle of the passage; The crushing assembly (3) extends into the soil conveying bin (2), and the rotation direction of the crushing assembly (3) is opposite to the rotation direction of the shield machine cutter head (1); The pulverizing assembly (3) comprises a motor (31), a gear plate (32), and a rotating separation tube (33); a rotating array of a side of the rotating separation tube (33) away from the stirring blade (13) has a plurality of latching teeth, the gear plate (32) meshes with the latching teeth, and the motor (31) and the gear plate (32) form a belt drive, so that the motor (31) drives the gear plate (32) to mesh and drive the rotating separation tube (33) to rotate; A limiting protrusion (334) protruding outward is provided in the middle of the circumference of the rotating separation tube (33), a guide rail (14) corresponding to the limiting protrusion (334) is provided in the shield machine cutter head (1), and the limiting protrusion (334) is embedded in the guide rail (14); A separation bucket is provided at the end of the rotating separation tube (33) on one side away from the motor (31); the surface of the separation bucket gradually deepens from the edge to the middle, and a strip opening (331), a circular opening 1 (332), and a circular opening 2 (333) are sequentially provided on the surface of the separation bucket from the edge to the middle; the strip opening (331) and the circular opening 1 (332) are both arranged in a ring array; The strip-shaped opening (331) is a strip-shaped structure, the circular opening 1 (332) and the circular opening 2 (333) are both circular structures, the inner diameter of the circular opening 1 (332) is smaller than the inner diameter of the circular opening 2 (333), the inner diameter of the circular opening 1 (332) is larger than the width of the strip-shaped opening (331), and the circular opening 2 (333) is located in the middle of the separation bucket; The middle part of the separation bucket extends into the conveying soil bin (2); The conveying soil bin (2) comprises a main body (21), a connecting shell 1 (22), and a connecting shell 2 (23); the connecting shell 2 (23) is connected to the main body (21) via the connecting shell 1 (22); the connecting shell 2 (23) is arranged at one end of the connecting shell 1 (22) close to the rotating separation tube (33); the connecting shell 1 (22) and the connecting shell 2 (23) are both flared structures; the large-diameter end of the connecting shell 1 (22) is connected to the large-diameter end of the connecting shell 2 (23); and the separation bucket extends into the connecting shell 2 (23); The outer rotating array of the second connecting shell (23) has a plurality of strip-shaped crushing pieces (231), and there is a spacing between two adjacent strip-shaped crushing pieces (231). A second cavity is formed between the outer side of the second connecting shell (23) and the rotating separation tube (33). The surface of the second connecting shell (23) is provided with a plurality of filtering holes for filtering sand and gravel, and the filtering holes are in communication with the second cavity.

2. The stirring device of an earth pressure balance shield machine based on civil engineering according to claim 1, characterized in that: The circular opening one (332) is arranged on the surface of the separation bucket placed in the connection shell two (23), and the strip opening (331) is arranged on the surface of the separation bucket not placed in the connection shell two (23). When the mixture moves into the rotating separation tube (33) and passes through the strip opening (331), it will fall into the cavity two. When the mixture moves into the rotating separation tube (33) and passes through the circular opening one (332) or the circular opening two (333), it will directly fall into the connection shell one (22).

3. The stirring device of an earth pressure balance shield machine based on civil engineering according to claim 2, characterized in that: The invention also comprises a control module for controlling the rotation of the rotating separation tube (33), the control module comprising a motor (31) and a gear plate (32), so as to change the rotation speed ratio of the rotating separation tube (33) and the shield machine cutter head (1) during rotation by controlling the rotation speed of the gear plate (32), and to stir and crush large-volume rocks by means of the stirring blade (13) during the rotation of the shield machine cutter head (1).

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