Simulation experiment device for earth pressure balance shield machine

Abstract

The invention discloses a simulation experiment device for an earth pressure balance shield machine, and the device comprises a tunneling part, a reaction frame, and a plurality of duct pieces. An assembling part used for sequentially assembling the multiple pipe pieces is arranged in the counter-force frame. The tunneling part comprises a shield body, a control center arranged on the outer wall of the shield body, and a partition plate, a cutting assembly, a muck conveying assembly and a pushing assembly which are arranged in the shield body; the control center is in electric signal connection with the cutting assembly, the muck conveying assembly and the pushing assembly. The partition plate is arranged in the front end of the shield body and further provided with a first through hole and a second through hole, and the cutting assembly and the muck conveying assembly penetrate through the first through hole and the second through hole. The cutting assembly comprises a cutterhead and a cutterhead motor, the cutterhead and the cutterhead motor are located on the two sides of the partition plate, a soil storage bin is formed between the cutterhead and the partition plate, and the soil storage bin is further communicated with the muck conveying assembly; one end of the pushing assembly is fixed to the surface of the partition plate, and the other end abuts against the multiple pipe pieces. The invention aims to effectively simplify the simulation experiment device so as to reduce the experiment cost.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine test simulation, in particular to a simulation experiment device for an earth pressure balance shield machine. Background Art

[0002] At present, the shield method is a fully mechanized construction method in the dark excavation method. It pushes the shield machine into the ground, and supports the surrounding rock with the shield shell and segments to prevent collapse into the tunnel. At the same time, the soil is excavated in front of the excavation face with a cutting device, transported out of the cave by an excavation machine, and pushed forward by a jack at the rear, and prefabricated concrete segments are assembled to form a mechanized construction method of the tunnel structure.

[0003] Among them, shield construction mainly includes three stages: starting, excavation and receiving. There are two main normal excavation methods: earth pressure balance shield and slurry pressure shield. The working principle of the earth pressure balance shield is that the earth pressure balance shield cuts the soil in front through the cutter disc, and then transports the soil to the muck truck through the screw conveyor and belt conveyor. The muck truck transports the soil to the starting well, and then transports the soil to the ground through the vertical system. The working principle of the slurry pressure shield is that the slurry pressure shield also cuts the soil in front through the cutter disc, but the cut soil and sand are mixed with low-density mud to form high-density mud. The high-density mud is transported to the sedimentation tank on the ground through the mud system, and becomes low-density mud after sedimentation, and then enters the next circulation system. And the earth pressure balance shield is generally suitable for sandy soil and clay, low water pressure and small water volume formation; while the slurry pressure shield is more suitable for sandy or pebble formations with more water or high water and soil pressure. The excavation surface of these formations is unstable and groundwater is easy to lose. Furthermore, in the actual test process, earth pressure balance shield is often used for test simulation. In situ tests are difficult, time-consuming and labor-intensive to implement, and collecting relevant data on site during construction will affect the construction progress. Due to the complexity of the shield construction excavation process, most model tests only consider a certain process of the excavation process, and lack comprehensiveness and systematicness.

[0004] The invention patent with the existing patent publication number CN102467836A discloses an earth pressure balance shield machine teaching system, which is to arrange the simulated real earth pressure balance shield machine exit door, shield machine launch frame and subway station platform in sequence in the underground layer of the simulated shield construction site, and the shield machine launch frame is provided with the shield model machine cutting ring, support ring, shield tail, pipe segment in sequence, and the subway station platform is provided with a reaction frame, a follow-up trolley and a transport trolley. Although the earth pressure balance shield machine construction technology can be intuitively demonstrated and taught to the shield machine on-site operators and students of the construction school to achieve the purpose of teaching and training, the whole system has too many internal electrical components, which increases the experimental cost investment, and thus it is urgent to propose a test device with low cost and high efficiency to simulate the earth pressure balance shield machine. Summary of the invention

[0005] The main purpose of the present invention is to provide a simulation experiment device for an earth pressure balance shield machine, aiming to solve the technical problem that the existing shield machine simulation experiment device has low cost performance.

[0006] To achieve the above-mentioned object, the present invention provides a simulation experiment device for an earth pressure balance shield machine, the device comprising a tunneling part, a reaction frame and a plurality of pipe segments abutting between the tunneling part and the reaction frame;

[0007] The reaction frame is provided with an assembly part for sequentially assembling a plurality of pipe segments, and the reaction frame is used to provide reaction force support for the excavation process of the excavation part;

[0008] The excavation part comprises a shield body, a control center arranged on the outer wall of the shield body, a partition plate arranged in the shield body (1-1), a cutting assembly, a slag conveying assembly, and a pushing assembly, wherein the control center is connected to the cutting assembly, the slag conveying assembly, and the pushing assembly by electrical signals respectively;

[0009] The partition is arranged inside the front end of the shield body, and the partition is also provided with a first through hole and a second through hole for the cutting assembly and the slag conveying assembly to pass through;

[0010] The cutting assembly includes a cutter disc and a cutter disc motor for driving the cutter disc to rotate, the cutter disc and the cutter disc motor are located on both sides of the partition, a soil storage bin for temporarily storing soil is formed between the cutter disc and the partition, and the soil storage bin is also connected to the slag conveying assembly;

[0011] One end of the first pushing assembly is fixed on the surface of the partition plate, and the other end is in contact with a plurality of pipe segments.

[0012] Optionally, the assembly part includes a pair of pipe segment fixing plates, a movable arm assembly adjustably connected to each pipe segment fixing plate, a movable telescopic part plug-connected to the movable arm assembly, and a movable platform slidably connected to the movable telescopic part;

[0013] The segment fixing plate is radially inserted into the reserved hole corresponding to the semicircular segment to be assembled to drive the semicircular segment to be assembled to move to the target position;

[0014] The movable telescopic part is used to control the rotation of the movable arm assembly to drive the segment fixing plate to rotate;

[0015] The moving platform is used to control the moving telescopic part to slide on the upper and lower surfaces of the moving platform to drive the moving arm assembly to move horizontally.

[0016] Optionally, each segment fixing plate includes an H-shaped plate body, and each H-shaped plate body includes two parallel plug-in columns and a connecting beam connecting the two plug-in columns;

[0017] Segment fixers and control components for adjusting the extension and contraction of each segment fixer are respectively provided at both ends of the two plug-in columns, and each segment fixer is used for plugging and connecting with the corresponding reserved hole of the semicircular segment to be assembled;

[0018] A side rope connection end is provided on the side wall of a plug-in column in each H-shaped plate body, and an upper rope connection end is provided on each connecting beam. The two upper rope connection ends and the side rope connection ends in a pair of pipe segment fixing plates are arranged in mirror symmetry.

[0019] Optionally, the movable arm assembly includes a limiting portion, a mechanical arm with ends symmetrically arranged on the limiting portion, and two second pushing assemblies;

[0020] The limiting part is provided with symmetrically distributed limiting channels, and the end of each mechanical arm is provided with a corresponding clamping block, and each clamping block part passes through the corresponding limiting channel and is movably connected with the limiting part;

[0021] The fixed end of each second pushing assembly is fixedly connected to the limiting part, the telescopic end of the second pushing assembly is fixedly connected to the mechanical arm, and the two second pushing assemblies are symmetrically connected to the limiting part and the mechanical arm;

[0022] The limiting part is also centrally provided with a shaft body, and the shaft body is plug-connected with the movable telescopic part;

[0023] A corresponding upper winch and a side winch are provided on one side of the surface of each mechanical arm close to the limiting part. Each upper winch is connected to a corresponding upper rope connecting end through a corresponding upper rope, and each side winch is connected to a corresponding side rope connecting end through a corresponding side rope.

[0024] Optionally, a connecting rod is further provided inside each mechanical arm, one end of each connecting rod is fixedly connected to the adjacent H-shaped plate body, and the other end is connected to the bidirectional steering device;

[0025] Each bidirectional steering device is embedded in each corresponding mechanical arm;

[0026] Corresponding upper limiters and side limiters are also arranged around each connecting rod, and each upper limiter and side limiter is embedded in the corresponding mechanical arm.

[0027] Optionally, the mobile telescopic part includes two symmetrically arranged control boxes and two sets of pulley barrels arranged between the control boxes;

[0028] The two ends of the two control boxes are connected by corresponding connecting parts, and each connecting part is fixedly connected to the moving platform;

[0029] Each control box is also provided with a large wheel and a small wheel connected by a belt, the small wheel is axially provided with a rotating handle, the large wheel is axially provided with a third through hole, and the third through hole is used for plugging and fixing with the shaft body;

[0030] The two groups of pulley barrels slide on the upper and lower surfaces of the moving platform respectively.

[0031] Optionally, the mobile platform includes a platform, third pushing assemblies symmetrically arranged on both sides of the platform, and a counterweight block located on the surface of the platform;

[0032] The platform is arranged on a bracket, and corresponding pulleys are installed at the bottom of the bracket, and each group of pulley cylinders slides on the upper and lower surfaces of the platform respectively;

[0033] The fixed end of each third pushing assembly is fixed to the corresponding area of ​​the platform, the telescopic end of the third pushing assembly is fixedly connected to the corresponding connecting part, and each third pushing assembly is controlled by a control rod.

[0034] Optionally, the platform is further provided with a safety protrusion, which is arranged on a side close to the excavation part, and the safety protrusion is used to limit and adjust the movable telescopic part.

[0035] Optionally, the cutting assembly further comprises a cutter disc motor support, one side of the cutter disc motor support is fixed to the surface of the partition plate, and the other side is connected to the cutter disc motor, the cutter disc motor is connected to the cutter disc through a coupling, and the coupling passes through the first through hole;

[0036] A torque sensor is installed on the coupling, and a plurality of soil pressure sensors are installed on the surface of one side of the partition close to the soil storage bin.

[0037] Optionally, the slag conveying assembly includes a spiral excavator and a slag conveyor belt, and the front end of the spiral excavator passes through the second through hole and is connected to the soil storage bin;

[0038] The spiral excavator comprises a cylinder, a cylinder rotating shaft arranged in the cylinder and an excavation port arranged at the tail of the cylinder, and the excavation port is located just above the muck conveyor belt.

[0039] Beneficial effects:

[0040] (1) The present invention comprehensively and systematically simulates the shield tunneling process and the segment assembly process, thus realizing the simulation of the entire shield tunnel construction process.

[0041] (2) The shield tunneling components can be safely controlled outside the device through unlimited remote control, and the soil pressure sensor installed on the partition and the torque sensor installed on the coupling can record the soil bin pressure and cutterhead torque during the experiment.

[0042] (3) The complex segment assembly process of a real shield machine is effectively simplified through the segment assembly department, and the assembly process can ensure the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0044] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a simulation experimental device for an earth pressure balance shield machine of the present invention;

[0045] Figure 2 This is a schematic diagram of shield tunneling components;

[0046] Figure 3 This is a schematic diagram of the connection between the cutter disc and the cutter disc motor;

[0047] Figure 4 This is a schematic diagram of the structure of the slag conveying device;

[0048] Figure 5 It is a schematic diagram of the structure of the segment assembly components;

[0049] Figure 6 A schematic diagram of a segment fixing plate for segment assembly components;

[0050] Figure 7 Schematic diagram of the moving arm assembly of the segment assembly parts;

[0051] Figure 8 A schematic top view of the moving arm assembly of the segment assembly components;

[0052] Fig. 9 Schematic diagram of the bidirectional diverter of the segment assembly components;

[0053] Fig.10 Schematic diagram of the telescopic rotating part of the segment assembly components;

[0054] Fig.11 Schematic diagram of the control box of the segment assembly components;

[0055] Fig.12 Schematic diagram of the moving platform for segment assembly components;

[0056] Fig.13 is a schematic diagram of the segment fixing member in a horizontal state;

[0057] Fig.14 is a schematic diagram of the segment fixing member in a vertical state;

[0058] Fig.15 This is a schematic diagram of the semicircular segments waiting to be merged.

[0059] Description of Figure Numbers:

[0060] 1. Excavation section, 1-1. Shield, 1-2. Cutterhead, 1-3. Cutterhead motor support, 1-3-1. Torque sensor, 1-3-2. Coupling, 1-4. Cutterhead motor, 1-5. First jacking assembly, 1-6. Auger, 1-6-1. Auger motor, 1-6-2. Cylinder shaft, 1-6-3. Cylinder, 1-6-4. Excavation port, 1-7. Conveyor belt, 1-8. Control center, 1-9. Partition;

[0061] 2. Segment fixing plate, 2-1. H-shaped plate body, 2-2. Side rope connecting end, 2-3. Upper rope connecting end, 2-4. Control member, 2-5. Segment fixing device;

[0062] 3. Mobile arm assembly, 3-1. Mechanical arm, 3-2. Upper rope, 3-3. Side rope, 3-4. Side stopper, 3-5. Upper stopper, 3-6. Connecting rod, 3-7. Upper winch, 3-8. Side winch, 3-9. Second push assembly, 3-10. Axle, 3-11. Two-way steering gear, 3-12. Limiting part;

[0063] 4. Mobile telescopic part, 4-1. Control box, 4-2. Pulley cylinder, 4-3. Handle, 4-4. Connecting part, 4-5. Small wheel, 4-6. Large wheel, 4-7. Belt;

[0064] 5. Mobile platform, 5-1. Platform, 5-2. Third push assembly, 5-3. Bracket, 5-4. Counterweight, 5-5. Safety protrusion, 5-6. Pulley, 5-7. Control lever;

[0065] 6. Reaction frame.

[0066] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0069] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0070] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0071] See also Figure 1-15 The present invention provides a structural schematic diagram of an embodiment of a simulation experimental device for an earth pressure balance shield machine, as shown in FIG. Figure 1 As shown, the device includes an excavation section 1, a reaction frame 6, and a plurality of pipe segments 7 abutting between the excavation section 1 and the reaction frame 6, and an assembly section for sequentially assembling the plurality of pipe segments 7 is provided inside the reaction frame 6. The reaction frame 6 is used to provide reaction force support for the excavation process of the excavation section 1. Preferably, a preset weight is provided on the reaction frame 6 to ensure the effective conduct of the experiment. More preferably, the reaction frame 3 is welded from rectangular steel.

[0072] like Figure 2 As shown, the excavation section 1 includes a shield body 1-1, a control center 1-8 arranged on the outer wall of the shield body 1-1, a partition 1-9, a cutting assembly, a slag conveying assembly, and a jacking assembly 1-5 arranged inside the shield body 1-1, and the control center 1-8 is electrically connected to the cutting assembly, the slag conveying assembly, and the jacking assembly 1-5 respectively. Preferably, the control center 1-8 is also electrically connected to a wireless remote control, thereby realizing integrated control through the wireless remote control to achieve efficient simulation of the excavation process.

[0073] Furthermore, the partition 1-9 is arranged inside the front end of the shield body 1-1, and the partition 1-9 is also provided with a first through hole and a second through hole for the cutting assembly and the slag conveying assembly to pass through; the cutting assembly includes a cutter disc 1-2 and a cutter disc motor 1-4 for driving the cutter disc 1-2 to rotate, the cutter disc 1-2 and the cutter disc motor 1-4 are located on both sides of the partition 1-9, and a soil storage bin for temporarily storing soil is formed between the cutter disc 1-2 and the partition 1-9, and the soil storage bin is also connected to the slag conveying assembly. Connected; and the cutting assembly also includes a cutter disc motor support 1-3, one side of the cutter disc motor support 1-3 is fixed to the surface of the partition 1-9, and the other side is connected to the cutter disc motor 1-4, the cutter disc motor 1-4 is connected to the cutter disc 1-2 through a coupling 1-3-2, the coupling 1-3-2 passes through the first through hole, and the cutter disc 1-2 is installed at the front of the shield body 1-1, and then the cutter disc motor 1-4 can drive the cutter disc 1-2 to rotate according to the preset speed of the control center 1-8.

[0074] Furthermore, if Figure 3 As shown, a torque sensor 1-3-1 is installed on the coupling 1-3-2, and the real-time torque of the cutter head 1-2 during the excavation process is recorded through the torque sensor 1-3-1.

[0075] Furthermore, a plurality of soil pressure sensors are installed on the surface of one side of the partition 1-9 close to the soil storage bin. The soil pressure sensors can record the soil bin pressure in the soil storage bin in real time and store it in the control center 1-8. If the soil bin pressure is too high, the control center 1-8 will issue a reminder.

[0076] Furthermore, if Figure 4 As shown, the slag conveying assembly includes a spiral excavator 1-6 and a slag conveyor belt 1-7. The front end of the spiral excavator 1-6 is connected to the soil storage bin through the second through hole, and then the soil in the soil storage bin is transferred out through the spiral excavator 1-6 and the slag conveyor belt 1-7.

[0077] Furthermore, the spiral excavator 1-6 includes a cylinder 1-6-3, a cylinder rotating shaft 1-6-2 arranged in the cylinder 1-6-3, and an excavation port 1-6-4 and a spiral excavator motor 1-6-1 arranged at the tail of the cylinder 1-6-3. The excavation port 1-6-4 is located directly above the slag conveyor belt 1-7. A conveyor belt motor is arranged at the front end of the slag conveyor belt 1-7, which is connected to the end roller of the slag conveyor belt by a connecting shaft. During the excavation process, the spiral excavator motor 1-6-1 controls the spiral excavator 1-6 to rotate, so as to bring out the soil in the soil storage bin through the cylinder rotating shaft 1-6-2 along the axial direction of the cylinder 1-6-3, and transport it out from the excavation port 1-6-4, and then fall onto the conveyor belt 1-7. The conveyor belt 1-7 sends the slag out of the shield excavation section 1, thereby completing the excavation operation experiment. Preferably, the conveyor belt motor and the spiral excavator motor 1-6-1 are both connected to the control center 1-8 by electrical signals, that is, the control center 1-8 controls the start and stop of the conveyor belt and the spiral excavator.

[0078] Furthermore, if Figure 2 As shown, the fixed end of the first jacking assembly 1-5 is fixed on the surface of the partition 1-9, and the telescopic end of the first jacking assembly 1-5 is in contact with multiple pipe segments 7. Preferably, the first jacking assembly 1-5 is a plurality of jacks, and the plurality of jacks are centrally symmetrically distributed on the surface of the partition 1-9. More preferably, the number of the jacks is 4, and the four jacks are centrally symmetrically distributed at different positions of the partition 1-9, so as to achieve uniform distribution of the excavation thrust, thereby ensuring the efficient progress of the excavation experiment.

[0079] Furthermore, if Figure 5-9 As shown, the assembly part includes a pair of segment fixing plates 2, a movable arm assembly 3 adjustably connected to each segment fixing plate 2, a movable telescopic part 4 fixedly connected to the movable arm assembly 3, and a movable platform 5 slidably connected to the movable telescopic part 4. The segment fixing plates 2 are radially inserted into the reserved holes corresponding to the semicircular segments 7 to be assembled to drive the semicircular segments 7 to be assembled to move to the target position, the movable telescopic part 4 is used to control the rotation of the movable arm assembly 3 to drive the rotation of the segment fixing plates 2, and the movable platform 5 is used to control the sliding of the movable telescopic part 4 on the upper and lower surfaces of the movable platform 5 to drive the movable arm assembly 3 to move horizontally; preferably, the movable arm assembly 3 is connected to the middle and upper part of the segment fixing plates 2.

[0080] Specifically, Figure 6As shown, each segment fixing plate 2 includes an H-shaped plate body 2-1, and each H-shaped plate body 2-1 includes two parallel plug-in columns and a connecting beam connecting the two plug-in columns, wherein the two ends of the two plug-in columns are respectively provided with segment fixers 2-5 and control members 2-4 for adjusting the extension and retraction of each segment fixer 2-5, and the side wall of a plug-in column in each H-shaped plate body 2-1 is provided with a side rope connecting end 2-2, and each connecting beam is provided with an upper rope connecting end 2-3, and the two upper rope connecting ends 2-3 and the side rope connecting ends 2-2 in a pair of segment fixing plates 2 are arranged in a mirror-symmetrical manner, and the two upper rope connecting ends 2-3 and the side rope connecting ends 2-2 are both used for active connection with the corresponding components in the movable arm assembly 3 to realize the adjustable connection of the movable arm assembly 3 to the segment fixing plate 2. And each segment fixer 2-5 is used for plug-in connection with the corresponding reserved hole of the semicircular segment 7 to be assembled, as shown in detail. Figure 13-14 As shown, the plug-in connection between the semicircular segment 7 and the segment holder 2-5 is achieved through the corresponding control member 2-4.

[0081] Furthermore, if Figure 7-8 As shown, the movable arm assembly 3 includes a limiting portion 3-12, two mechanical arms 3-1 whose ends are symmetrically arranged on the limiting portion 3-12, and two second push assemblies 3-9, wherein the limiting portion 3-12 is provided with symmetrically distributed limiting channels, and the ends of each mechanical arm 3-1 are provided with corresponding clamping blocks 3-13, and each clamping block 3-13 partially passes through the corresponding limiting channel and is movably connected with the limiting portion 3-12, that is, each clamping block 3-13 can move in the limiting channel. Preferably, each clamping block 3-13 has the same size and is a concave structure.

[0082] Further, the fixed end of each second jacking assembly 3-9 is fixedly connected to the limit portion 3-12, the telescopic end of the second jacking assembly 3-9 is fixedly connected to the mechanical arm 3-1, and the two second jacking assemblies 3-9 are symmetrically connected to the limit portion 3-12 and the mechanical arm 3-1, and then the deflection activity of the corresponding mechanical arm 3-1 and the limit portion 3-12 is realized by the second jacking assembly 3-9. Preferably, the activity angle of the mechanical arm 3-1 and the limit portion 3-12 is 85 to 90°, that is, the deflection angle of the mechanical arm 3-1 is 0 to 5°. In practical applications, the correspondingly connected semicircular pipe segments 7 can be brought closer to each other through the deflection of the two mechanical arms 3-1. Preferably, the second jacking assembly 3-9 is a jack. More preferably, the jack is manually adjusted to effectively reduce the experimental cost.

[0083] Furthermore, the limiting portion 3 - 12 is also centrally provided with an axis body 3 - 10 , and the axis body 3 - 10 is used for plug-in connection with the movable telescopic portion 4 .

[0084] Furthermore, a corresponding upper winch 3-7 and a side winch 3-8 are provided on the surface of each mechanical arm 3-1 near the limiting portion 3-12. Each upper winch 3-7 is connected to the corresponding upper rope connecting end 2-3 through the corresponding upper rope 3-2, and each side winch 3-8 is connected to the corresponding side rope connecting end 2-2 through the corresponding side rope 3-3. The upper rope 3-2 and the side rope 3-3 pass through the rope channels reserved inside each mechanical arm 3-1, respectively, so as to The upper winch 3-7 controls the extension and retraction of the upper rope 3-2 to adjust the rotation of the corresponding H-shaped plate 2-1 in the vertical plane direction, and the side winch 3-8 controls the side rope 3-3 to adjust the rotation of the corresponding H-shaped plate 2-1 in the horizontal plane direction. The upper winch 3-7 and the side winch 3-8 on the same mechanical arm 3-1 are coordinated to control the operation of the H-shaped plate 2-1, and finally the pipe segment 7 connected to the pipe segment fixing plate 2 is moved to the target position.

[0085] Furthermore, if Figure 7 , 9 As shown, each mechanical arm 3-1 is further provided with a connecting rod 3-6, one end of each connecting rod 3-6 is fixedly connected to the adjacent H-shaped plate 2-1, and the other end is connected to a two-way deflector 3-11, wherein each two-way deflector 3-11 is embedded in the corresponding mechanical arm 3-1, and each connecting rod 3-6 is surrounded by a corresponding upper limiter 3-5 and a side limiter 3-4, wherein each upper limiter 3-5 and a side limiter 3-4 are embedded in the corresponding mechanical arm 3-1. The coordinated action of the upper limiter 3-5, the side limiter 3-4, the upper rope 3-2, and the side rope 3-3 can effectively control the connecting rod 3-6 in a preset position. At the same time, the connecting rod 3-6 can also be arranged perpendicular to the mechanical arm 3-1 through the two-way deflector 3-11. For example, in actual experiments, at the initial stage of segment assembly, the segment fixing plate 2 is in a horizontal state under the influence of gravity, as shown in FIG. Fig.13 shown.

[0086] Furthermore, if Figures 10-11As shown, the movable telescopic part 4 includes two symmetrically arranged control boxes 4-1 and two groups of pulley barrels 4-2 arranged between the control boxes 4-1, wherein the two ends of the two control boxes 4-1 are connected by corresponding connecting parts 4-4, and each control box 4-1 is also provided with a large wheel 4-6 and a small wheel 4-5 connected by a belt 4-7, and the small wheel 4-5 is axially provided with a rotating handle 4-3, and the large wheel 4-6 is axially provided with a third through hole, and the third through hole is used for plugging and fixing with the shaft body 3-10, and then the small wheel 4-5 and the large wheel 4-6 are driven to rotate by rotating the rotating handle 4-3, and based on the plug-in connection between the shaft body 3-10 and the large wheel 4-6, the movable arm assembly 3 can also be driven to rotate, and finally the pipe segment to be assembled is driven to rotate. Preferably, the two groups of pulley barrels 4-2 are used to slide on the upper and lower surfaces of the moving platform 5 respectively, and each connecting part 4-4 is fixedly connected to the moving platform 5. In actual experiments, the movement of the corresponding components in the moving platform 5 can drive the connecting part 4-4 to operate, and drive the movable telescopic part 4 to slide on the upper and lower surfaces of the moving platform 5 respectively through the two groups of pulley barrels 4-2.

[0087] Furthermore, if Fig.12 As shown, the mobile platform 5 includes a platform 5-1, third push assemblies symmetrically arranged on both sides of the platform 5-1, and a counterweight block 5-4 located on the surface of the platform 5-1, wherein the platform 5-1 is arranged on a bracket 5-3, and each group of pulley barrels 4-2 slides on the upper and lower surfaces of the platform 5-1 respectively; and the fixed end of each third push assembly is fixed to the corresponding area of ​​the platform 5-1, and the telescopic end of the third push assembly is fixedly connected to the corresponding connecting part 4-4, and then the third push assembly pushes the mobile telescopic part 4 to slide. Preferably, each third push assembly is controlled by a control rod 5-7. More preferably, the third push assembly is a jack.

[0088] Furthermore, a corresponding pulley 5 - 6 is installed at the bottom of the bracket 5 - 3 , thereby controlling the overall sliding operation of the moving platform 5 .

[0089] Furthermore, the platform 5-1 is also provided with a safety protrusion 5-5, and the safety protrusion 5-5 is arranged on a side close to the excavation part 1, and the safety protrusion 5-5 is used to limit the movable telescopic part 4 to prevent the movable telescopic part 4 from sliding out of the platform 5-1.

[0090] Furthermore, in order to better illustrate the corresponding structure in this embodiment, the specific operations in actual use are as follows:

[0091] Excavation experiment: After setting the excavation related parameters such as the thrust of the simulation test jack, the rotation speed of the screw excavator 1-6, and the rotation speed of the cutter head 1-2 in the control center 1-8, the excavation component 1 is placed in the model box. Move the reaction frame 3 to the end of the excavation part 1, and place a heavy object on the lower crossbeam of the reaction frame 3. The control center 1-8 can be operated by an external wireless remote controller to start and stop the cutterhead 1-2, the jack 1-5 and the slag conveying device. The cutterhead 1-2, the jack and the slag conveying device are started to simulate the excavation process. The cutterhead 1-2 starts to rotate and cut the soil, and the soil is stored in the soil storage bin. At the same time, the jack is extended, and the shield body 1 moves forward due to the reaction force generated by the pipe segment 7 and the reaction frame 3. The spiral excavator shaft 1-6-2 starts to rotate at a preset speed, and the slag in the soil storage bin is brought out through the cylinder 1-6-3, and falls onto the slag conveyor belt 1-7 through the excavation port 1-6-4, and is sent out of the excavation part 1 by the conveyor belt 1-7. When the jack is extended to the width of a pipe segment 7, the jack is stopped from extending and the front end of the jack is retracted.

[0092] Assembly experiment: In the initial state, Fig.13 As shown, the upper winch 3-7 on the movable arm assembly 3 is released, the segment fixing plate 2 is swung to a horizontal state under the gravity, the semicircular segment 7 is connected to the H-shaped plate body 2-1, and the semicircular segment 7 is moved to the target position by comprehensive control of the movable platform 5 and the movable telescopic part 4; further, the upper winch 3-7 of the movable arm assembly 3 is rotated first to gradually pull the segment fixing plate 2 up to a vertical state, as shown in FIG. Fig.14 As shown; further, the side winches 3-8 on both sides of the mechanical arm 3-1 are rotated and the upper winch 3-7 is controlled to appropriately loosen the upper rope 3-2 to realize the rotation of the pipe segment fixing plate 2 to both sides, and the jack 3-9 on the limit part 3-12 is controlled to move toward the middle to realize the connection of the two semicircular pipe segments 7. After the assembly process is completed, the assembly part is withdrawn.

[0093] Furthermore, the wireless remote controller is used again to operate the control center to start the cutter disc 1-2, the jack and the slag conveying device to continue the next cycle of operation.

[0094] In the above embodiments, those skilled in the art may adopt the existing technology for software control, and the present invention only protects the structure of the simulation experimental device for an earth pressure balance shield machine and the mutual connection relationship.

[0095] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A simulation experimental device for an earth pressure balance shield machine, characterized in that: The device comprises a tunneling part (1), a reaction frame (6), and a plurality of pipe segments (7) abutting between the tunneling part (1) and the reaction frame (6); An assembling portion for sequentially assembling a plurality of pipe segments (7) is provided inside the reaction frame (6), and the reaction frame (6) is used to provide reaction force support for the excavation process of the excavation section (1); The excavation section (1) comprises a shield body (1-1), a control center (1-8) arranged on the outer wall of the shield body (1-1), a partition plate (1-9) arranged inside the shield body (1-1), a cutting assembly, a slag conveying assembly, and a pushing assembly (1-5); the control center (1-8) is electrically connected to the cutting assembly, the slag conveying assembly, and the pushing assembly (1-5) respectively; The partition plate (1-9) is arranged inside the front end of the shield body (1-1), and the partition plate (1-9) is also provided with a first through hole and a second through hole for the cutting assembly and the slag conveying assembly to pass through; The cutting assembly comprises a cutter disc (1-2) and a cutter disc motor (1-4) for driving the cutter disc (1-2) to rotate, the cutter disc (1-2) and the cutter disc motor (1-4) are located on both sides of a partition (1-9), a soil storage bin for temporarily storing soil is formed between the cutter disc (1-2) and the partition (1-9), and the soil storage bin is also connected to the slag conveying assembly; One end of the first pushing component (1-5) is fixed to the surface of the partition (1-9), and the other end is in contact with a plurality of pipe segments (7).

2. The simulation experimental device for an earth pressure balance shield machine according to claim 1, characterized in that: The assembly part comprises a pair of pipe segment fixing plates (2), a movable arm assembly (3) adjustably connected to each pipe segment fixing plate (2), a movable telescopic part (4) plug-connected to the movable arm assembly (3), and a movable platform (5) slidably connected to the movable telescopic part (4); The pipe segment fixing plate (2) is radially inserted into a reserved hole corresponding to the semicircular pipe segment (7) to be assembled so as to drive the semicircular pipe segment (7) to be assembled to move to a target position; The movable telescopic part (4) is used to control the rotation of the movable arm assembly (3) to drive the pipe segment fixing plate (2) to rotate; The moving platform (5) is used to control the moving telescopic part (4) to slide on the upper and lower surfaces of the moving platform (5) so as to drive the moving arm assembly (3) to move horizontally.

3. The simulation experimental device for an earth pressure balance shield machine according to claim 2, characterized in that: Each pipe segment fixing plate (2) comprises an H-shaped plate body (2-1), and each H-shaped plate body (2-1) comprises two parallel plug-in columns and a connecting beam connecting the two plug-in columns; Segment fixers (2-5) and control components (2-4) for adjusting the extension and retraction of each segment fixer (2-5) are respectively arranged at both ends of the two plug-in columns, and each segment fixer (2-5) is used for plugging and connecting with a corresponding reserved hole of a semicircular segment (7) to be assembled; A side rope connection end (2-2) is provided on the side wall of a plug-in column in each H-shaped plate body (2-1), and an upper rope connection end (2-3) is provided on each connecting beam. The two upper rope connection ends (2-3) and the side rope connection ends (2-2) in a pair of pipe segment fixing plates (2) are arranged in a mirror-symmetrical manner.

4. The simulation experimental device for an earth pressure balance shield machine according to claim 3, characterized in that: The movable arm assembly (3) comprises a limiting portion (3-12), a mechanical arm (3-1) whose ends are symmetrically arranged on the limiting portion (3-12), and two second pushing assemblies (3-9); The limiting portion (3-12) is provided with symmetrically distributed limiting channels, and the end of each mechanical arm (3-1) is provided with a corresponding clamping block (3-13), and each clamping block (3-13) partially passes through the corresponding limiting channel and is movably connected to the limiting portion (3-12); The fixed end of each second pushing assembly (3-9) is fixedly connected to the limiting portion (3-12), the telescopic end of the second pushing assembly (3-9) is fixedly connected to the mechanical arm (3-1), and the two second pushing assemblies are symmetrically connected to the limiting portion (3-12) and the mechanical arm (3-1); The limiting portion (3-12) is also centrally provided with a shaft body (3-10), and the shaft body (3-10) is used for plugging and connecting with the movable telescopic portion (4); A corresponding upper winch (3-7) and a side winch (3-8) are provided on a side of the surface of each mechanical arm (3-1) close to the limiting portion (3-12); each upper winch (3-7) is connected to a corresponding upper rope connecting end (2-3) via a corresponding upper rope (3-2); and each side winch (3-8) is connected to a corresponding side rope connecting end (2-2) via a corresponding side rope (3-3).

5. The simulation experimental device for an earth pressure balance shield machine according to claim 4, characterized in that: A connecting rod (3-6) is also provided inside each mechanical arm (3-1), one end of each connecting rod (3-6) is fixedly connected to the adjacent H-shaped plate (2-1), and the other end is connected to the bidirectional diverter (3-11); Each bidirectional steering device (3-11) is embedded in each corresponding mechanical arm (3-1); A corresponding upper stopper (3-5) and a side stopper (3-4) are arranged around each connecting rod (3-6), and each upper stopper (3-5) and side stopper (3-4) are embedded in the corresponding mechanical arm (3-1).

6. The simulation experimental device for an earth pressure balance shield machine according to claim 5, characterized in that: The movable telescopic part (4) comprises two symmetrically arranged control boxes (4-1) and two groups of pulley barrels (4-2) arranged between the control boxes (4-1); The two ends of the two control boxes (4-1) are connected via corresponding connecting parts (4-4), and each connecting part (4-4) is fixedly connected to the moving platform (5); Each control box (4-1) is also provided with a large wheel (4-6) and a small wheel (4-5) connected by a belt (4-7); the small wheel (4-5) is axially provided with a rotating handle (4-3); the large wheel (4-6) is axially provided with a third through hole; the third through hole is used for plugging and fixing with the shaft body (3-10); The two groups of pulley barrels (4-2) are used to slide on the upper and lower surfaces of the moving platform (5) respectively.

7. The simulation experimental device for an earth pressure balance shield machine according to claim 6, characterized in that: The mobile platform (5) comprises a platform (5-1), a third pushing assembly symmetrically arranged on both sides of the platform (5-1), and a counterweight block (5-4) located on the surface of the platform (5-1); The platform (5-1) is arranged on a bracket (5-3), a corresponding pulley (5-6) is installed at the bottom of the bracket (5-3), and each group of pulley cylinders (4-2) slides on the upper and lower surfaces of the platform (5-1) respectively; The fixed end of each third pushing assembly is fixed to a corresponding area of ​​the platform (5-1), the telescopic end of the third pushing assembly is fixedly connected to the corresponding connecting part (4-4), and each third pushing assembly is controlled by a control rod (5-7).

8. The simulation experimental device for an earth pressure balance shield machine according to claim 7, characterized in that: The platform (5-1) is also provided with a safety protrusion (5-5), which is arranged on a side close to the excavation part (1), and is used to perform position limiting adjustment on the movable telescopic part (4).

9. The simulation experimental device for an earth pressure balance shield machine according to any one of claims 1 to 8, characterized in that: The cutting assembly further comprises a cutter disc motor support (1-3), one side of the cutter disc motor support (1-3) is fixed to the surface of the partition (1-9), and the other side is connected to the cutter disc motor (1-4), the cutter disc motor (1-4) is connected to the cutter disc (1-2) via a coupling (1-3-2), and the coupling (1-3-2) passes through the first through hole; A torque sensor (1-3-1) is installed on the coupling (1-3-2), and a plurality of soil pressure sensors are installed on the surface of one side of the partition (1-9) close to the soil storage bin.

10. The simulation experimental device for an earth pressure balance shield machine according to claim 9, characterized in that: The slag conveying assembly comprises a spiral excavator (1-6) and a slag conveyor belt (1-7); the front end of the spiral excavator (1-6) passes through the second through hole and is connected to the soil storage bin; The spiral excavator (1-6) comprises a cylinder (1-6-3), a cylinder rotating shaft (1-6-2) arranged in the cylinder (1-6-3), and an excavation port (1-6-4) arranged at the tail of the cylinder (1-6-3), wherein the excavation port (1-6-4) is located directly above the slag conveyor belt (1-7).

Images