Residue soil screening and crushing box and shield tunneling machine

Abstract

The invention discloses a muck screening and crushing box and a shield tunneling machine, belongs to the technical field of tunneling construction equipment, and aims to solve the problem that tunneling construction in a stratum containing large-particle muck needs to be stopped frequently. The muck screening and crushing box comprises an outer box body (59), and an inner cavity (591) and a roller screening device (56) are arranged in the outer box body (59); the inner cavity (591) is divided into an upper cavity (5911) and a lower cavity (5912) by a roller screening device (56), and a crushing device (57) is arranged in the upper cavity (5911). The muck screening and crushing box has screening and crushing functions, large-particle muck and small-particle muck can be screened out from muck, the large-particle muck can be crushed, and the large-particle muck which cannot be crushed can be discharged, so that the screening and crushing efficiency can be improved, the fault rate can be reduced, and the cost can be reduced. And the tunneling construction efficiency can also be improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel excavation construction equipment, in particular to a slag screening and crushing box, and also to a shield machine. Background Art

[0002] Due to the limited particle size of the slag that can pass through the slurry pump of the circulation system of the slurry balance shield machine, when constructing in composite formations, broken belts, pebble formations and other working conditions, the slurry pump is often blocked, which seriously affects the construction and excavation. In order to avoid the blockage of the slurry pump by slag, measures such as adding a quarrying box and a screening box in front of the slurry pump are usually adopted. However, the slurry shield machine needs to maintain a certain pressure (about 6bar-12bar) during construction and the amount of slag discharged per ring is large. When constructing in a pebble formation or a broken belt formation containing large particles of slag (or slag), the large particles of slag (or slag) will quickly fill the quarrying box or screening box, and the machine needs to be stopped to remove the stones, which will greatly reduce the excavation efficiency. Summary of the invention

[0003] In order to solve the above-mentioned problem that tunneling construction in strata containing large particles of debris requires frequent shutdowns, the present invention provides a debris screening and crushing box and a shield machine. The debris screening and crushing box has screening and crushing functions. It can not only screen the debris into large particles and small particles, but also crush the large particles and discharge the large particles that cannot be crushed. This can not only improve the screening and crushing efficiency, but also reduce the failure rate and improve the efficiency of tunneling construction.

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

[0005] A slag screening and crushing box comprises an outer box body, the outer box body contains an internal cavity and a roller screening device, the internal cavity is divided into an upper cavity and a lower cavity by the roller screening device, the roller screening device contains a roller driving mechanism and a plurality of rollers, the plurality of rollers are arranged at intervals from front to rear, the roller driving mechanism can drive the plurality of rollers to rotate and make the stones on the plurality of rollers move backward, a crushing device is arranged in the upper cavity, and the crushing device can crush the stones on the rollers.

[0006] A shield machine comprises a cutter head, a soil bin, a main screw conveyor, a quarrying box and a slag screening and crushing box, the slag screening and crushing box is the above-mentioned slag screening and crushing box, the main screw conveyor comprises a barrel, a first outlet and a second outlet are arranged on the barrel, the first outlet is lower than the second outlet, a screening mesh plate is arranged in the first outlet, the quarrying box comprises a shell, a quarrying inlet is arranged on the shell, the first outlet is connected to the quarrying inlet, and the second outlet is connected to the raw material inlet of the slag screening and crushing box.

[0007] The beneficial effects of the embodiments of the present invention are:

[0008] 1. A complete set of design and construction methods, including screening of large-particle slag, centralized crushing of large-particle slag, storage of relatively hard slag and quarrying without stopping the machine, is adopted to solve the construction problem of frequent shutdown in broken strata and pebble strata.

[0009] 2. Use multi-stage slag screening, crushing and quarrying to process slag with different particles and hardness in a targeted manner, so as to improve the slag processing efficiency and the operating stability of each component.

[0010] 3. The slag screening and crushing box realizes multi-stage crushing of slag with hardness below a certain level by limiting the oil pressure step size of the multi-stage crushing device cylinder, and discharges slag with particle size below a certain level after crushing; the storage of large particles of hard slag solves the construction problems of low slag screening efficiency, poor screening effect, and slag accumulation blocking the screening box.

[0011] 4. The designed tandem screw conveyor device is an automated normal pressure quarrying device, which proposes an automated method for transporting large-particle slag without stopping the machine, solving the construction problem of frequent shutdown of the slurry shield due to slag blockage.

[0012] 5. A gas storage and exhaust system was designed, and a pressure detection and gate control system was proposed to solve the safety issues of automated slag discharge and the safety risk issues of the cavitation mud and water circulation system.

[0013] 6. It can effectively improve the efficiency of slurry shield tunneling in large-particle slag and poor strata, solve the construction problems under such working conditions, greatly save manpower, material resources and construction costs, and greatly improve construction efficiency. With the increasing application of slurry tunnel engineering, the application scope and use value of the present invention are also becoming more and more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic diagram of the slag screening and crushing box of the present invention.

[0016] Figure 2 is along Figure 1 Schematic cross-sectional view along the AA direction.

[0017] Figure 3 It is a schematic diagram of the shield machine described in the present invention.

[0018] Figure 4 This is a schematic diagram of the connection between the first-level stone storage box and the second-level stone storage box.

[0019] Figure 5 is along Figure 4 Schematic cross-sectional view along the BB direction.

[0020] Figure 6 is along Figure 4 Schematic cross-sectional view in the CC direction.

[0021] Figure 7 is a schematic diagram of the collection tank.

[0022] The following are the descriptions of the reference numerals:

[0023] 1. Cutterhead; 2. Soil bin; 3. Main screw conveyor; 4. Quarrying box; 5. Muck screening and crushing box; 6. Primary stone storage box; 7. Secondary stone storage box; 8. Gas storage and exhaust system; 9. Stone transport box; 10. Stones;

[0024] 31. Observation window and inspection port of screw conveyor; 32. Telescopic structure; 33. Screw conveyor shaft; 34. Driving device; 35. First gate device; 36. Cylinder;

[0025] 41. Second slag flushing slurry inlet; 42. Quarrying inlet; 43. Second gate device; 44. Second slag flushing slurry outlet; 45. Shell; 46. Accommodating cavity;

[0026] 51. First slag-flushing slurry inlet; 52. Inspection port and pressure detection device; 53. First slag-flushing slurry outlet; 54. Raw material inlet; 55. Third gate device; 56. Roller screening device; 57. Crushing device; 58. Stone outlet; 59. Outer box;

[0027] 61. First box; 62. First stone storage entrance; 63. First-level screw conveyor; 64. First-level gate device;

[0028] 71. Second box; 72. Second stone storage entrance; 73. Secondary screw conveyor; 74. Secondary gate device;

[0029] 81. Collection inlet; 82. Collection outlet; 83. Collection tank; 84. Pipeline; 85. Detection device;

[0030] 361, first outlet; 362, second outlet; 363, screening mesh plate;

[0031] 561. roller; 562. roller drive mechanism;

[0032] 571. clamping plate; 572. clamping plate driving mechanism; 573. clamping plate seat;

[0033] 591, internal cavity; 5911, upper cavity; 5912, lower cavity;

[0034] 631. First-stage screw conveyor shaft; 632. First-stage screw drive device; 633. Outlet of the first-stage screw conveyor.

[0035] 731. Second-stage screw conveyor shaft; 732. Second-stage screw drive device; 733. Outlet of the second-stage screw conveyor. Specific embodiments

[0036] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0037] For the convenience of understanding and description, an absolute positional relationship is adopted in the following description of the present invention. Unless otherwise specified, the azimuth term "upper" represents Figure 3 the upper side direction in Figure 3 the azimuth term "lower" represents Figure 3 the lower side direction in Figure 3 the azimuth term "left" represents the direction perpendicular to Figure 3 the paper surface of Figure 3 and pointing outside the paper surface, the azimuth term "right" represents the direction perpendicular to

[0038] the paper surface of Figure 1 to Figure 2 and pointing inside the paper surface, the azimuth term "front" represents

[0039] Figure 3 the left side direction in Figure 3 the azimuth term "rear" represents the right side direction in

[0038] As Figure 1 to Figure 2 shown, a muck screening and crushing box according to an embodiment of the present invention includes an outer box body 59. An internal cavity 591 and a roller screening device 56 are contained in the outer box body 59. The internal cavity 591 is separated by the roller screening device 56 into an upper cavity 5911 and a lower cavity 5912. The roller screening device 56 includes a roller drive mechanism 562 and a plurality of rollers 561. The plurality of rollers 561 are arranged at intervals in the front-to-rear direction. The roller drive mechanism 562 can drive the plurality of rollers 561 to rotate and make the stones 10 on the plurality of rollers 561 move backward. A crushing device 57 is arranged in the upper cavity 5911. The crushing device 57 can crush the stones 10 on the rollers 561.

[0039] The slag screening and crushing box includes a roller screening device 56 and a crushing device 57. As the first inventive point of the present invention, the roller screening device 56 has a slag screening function, and the crushing device 57 has a slag crushing function. The slag screening and crushing box can not only screen the slag into large particles and small particles, but also crush the large particles, and discharge the large particles that cannot be crushed, which can improve the efficiency of screening and crushing, reduce the failure rate, and improve the efficiency of excavation construction.

[0040] like Figure 1 to Figure 2 As shown, the crushing device 57 includes a clamping plate 571 and a clamping plate driving mechanism 572. The two clamping plates 571 are arranged at intervals on the left and right. The clamping plates 571 are made of a composite material with a certain hardness to improve the extrusion crushing effect. The clamping plate driving mechanism 572 can drive the two clamping plates 571 to move closer to or away from each other, and the two clamping plates 571 can crush the stone 10 on the roller 561. For example, when a large-particle stone 10 is located between the two clamping plates 571, the two clamping plates 571 can move closer to each other to crush the stone 10.

[0041] The crushing device 57 also contains a clamping plate seat 573, which is located above the clamping plate 571. The upper ends of the two clamping plates 571 are hinged to the two clamping plates 571. The two clamping plate driving mechanisms 572 correspond to the two clamping plates 571 one by one. The upper ends of the clamping plate driving mechanisms 572 are hinged to the outer box body 59. The upper ends of the clamping plate driving mechanisms 572 are hinged to the clamping plates 571. The clamping plate driving mechanisms 572 can drive the lower parts of the two clamping plates 571 to move closer to or away from each other.

[0042] A plurality of crushing devices 57 are arranged in the upper cavity 5911, and the plurality of crushing devices 57 are arranged at intervals in the direction from front to back, and the clamping plate driving mechanism 572 can be a hydraulic cylinder. In order to protect the crushing device 57, each clamping plate driving mechanism 572 is connected to a pressure protection module, and the pressure protection module can adopt the existing technology. The pressure protection module can make the maximum output pressure value of the clamping plate driving mechanism 572 less than or equal to the set pressure value, and the set pressure value can be specifically determined according to actual needs or a limited number of tests. In the direction from front to back, the maximum output pressure value of the clamping plate driving mechanism 572 of the plurality of crushing devices 57 gradually increases.

[0043] like Figure 1 to Figure 2As shown, each roller 561 extends in the left-right direction, and the distance between two adjacent rollers 561 can be a set distance value, which can be specifically determined according to actual needs or a limited number of tests. The roller drive mechanism 562 can drive the multiple rollers 561 to rotate clockwise, so that the stones 10 on the multiple rollers 561 can move backward. The rollers 561 have wear resistance. The roller drive mechanism 562 can include a motor and a chain drive assembly. The multiple rollers 561, the chain drive assembly and the motor are connected in sequence.

[0044] As the second inventive point of the present invention, since each clamp driving mechanism 572 is connected to a pressure protection module, the stone 10 with a hardness value less than the set hardness value can be crushed by the clamp 571, while the stone 10 with a hardness value greater than the set hardness value cannot be crushed by the clamp 571. The stone 10 with a particle size less than the set distance value can pass through the distance between the two rollers 561 and fall into the lower cavity 5912, while the stone 10 with a particle size greater than the set distance value cannot. Finally, the stone 10 with an actual hardness value greater than the set hardness value and an actual particle size greater than the set distance value will be discharged from the following stone outlet 58. The slag screening and crushing box screens out the stone 10 with a hardness value less than the set hardness value and crushes it, while the stone 10 with a hardness value greater than the set hardness value is discharged, which can not only improve the efficiency of screening and crushing, but also reduce the failure rate, and also improve the efficiency of excavation construction. The set hardness value can be specifically determined according to actual needs or a limited number of tests.

[0045] The front of the outer box 59 is provided with a raw material inlet 54, and the rear of the outer box 59 is provided with a stone outlet 58. The raw material inlet 54 and the raw material inlet 54 are both connected to the upper cavity 5911. The outer box 59 is a box with a certain pressure bearing capacity, capable of mechanically screening the particle size of slag, crushing large particles of slag with a certain hardness, and storing slag of different particle sizes. The lower part of the outer box 59 is provided with an inspection port and a pressure detection device 52, which can meet the needs of personnel entering the outer box 59 in emergency and maintenance. The third gate device 55 is provided at the raw material inlet 54, and the third gate device 55 can open and close the raw material inlet 54. The third gate device 55 can close this gate when the slag screening and crushing box 5 is in the maintenance state to ensure the safety of maintenance personnel.

[0046] like Figure 1 to Figure 2As shown, a first slag flushing slurry inlet 51 is provided at the front portion of the outer box body 59, and a first slag flushing slurry outlet 53 is provided at the rear portion of the outer box body 59, the first slag flushing slurry inlet 51 is connected to the upper cavity 5911 and / or the lower cavity 5912 (the first slag flushing slurry inlet 51 is connected to the upper cavity 5911, or the first slag flushing slurry inlet 51 is connected to the lower cavity 5912, or the first slag flushing slurry inlet 51 is connected to the upper cavity 5911 and the lower cavity 5912), and the first slag flushing slurry outlet 53 is connected to the lower cavity 5912.

[0047] The slag screening and crushing box achieves multi-stage crushing of slag with a hardness below a certain level by limiting the oil pressure step size of the multi-stage crushing device cylinder, and discharges slag with a particle size below a certain level after crushing; the storage of slag with large particles and relatively hardness solves the construction problems of low slag screening efficiency, poor screening effect, and slag accumulation clogging the screening box.

[0048] The working process of the slag screening and crushing box is introduced below.

[0049] Large-particle rocks 10 enter the slag screening and crushing box from the raw material inlet 54, and fall on the roller 561. The roller drive mechanism 562 can drive the multiple rollers 561 to rotate, so that the rocks 10 on the multiple rollers 561 move backward. When the large-particle rocks 10 are located between the two clamping plates 571, the clamping plate drive mechanism 572 drives the two clamping plates 571 to approach each other to crush the rocks 10. The crushed large-particle rocks 10 are formed into small-particle rocks 10, and the small-particle rocks 10 pass through the gap between the two adjacent rollers 561 and fall into the lower cavity 5912. The multiple rollers 561 screen the rocks 10, and the large-particle rocks 10 that are not crushed or the rocks 10 that do not pass between the two adjacent rollers 561 continue to move backward under the action of the rollers 561. The crushed large-particle stones 10 are formed into small-particle stones 10, and the small-particle stones 10 pass through the gap between two adjacent rollers 561 and fall into the lower cavity 5912. Finally, the large-particle stones 10 that are not crushed or the stones 10 that do not pass between two adjacent rollers 561 will be discharged from the stone outlet 58.

[0050] The slag flushing slurry enters the lower cavity 5912 from the first slag flushing slurry inlet 51. The slag flushing slurry carries the small-grained stones 10 in the lower cavity 5912 and enters the slag discharge system of the shield machine through the first slag flushing slurry outlet 53 and the slag discharge pipeline in turn, and is finally discharged to the ground.

[0051] The following is a shield machine. Figure 3As shown, the shield machine includes a cutter head 1, a soil bin 2, a main screw conveyor 3, a quarrying box 4 and a slag screening and crushing box 5. The slag screening and crushing box 5 is the above-mentioned slag screening and crushing box. The main screw conveyor 3 includes a barrel 36. The barrel 36 is provided with a first outlet 361 and a second outlet 362. The first outlet 361 is lower than the second outlet 362. A screening mesh plate 363 is provided in the first outlet 361. The quarrying box 4 includes a shell 45. A quarrying inlet 42 is provided on the shell 45. The first outlet 361 is connected to the quarrying inlet 42, and the second outlet 362 is connected to the raw material inlet 54 of the slag screening and crushing box 5. The aperture of the screening mesh plate 363 can be obtained according to a limited number of experiments.

[0052] As the third inventive point of the present invention, the aperture of the screening mesh plate 363 is smaller than the set aperture value, and the screening mesh plate 363 can perform the first screening of the slag, and discharge the stones 10 in the slag with a particle size smaller than the set aperture value into the quarrying box 4 by gravity, and then discharge them efficiently through the slag discharge pipe to avoid blockage. The stones 10 in the slag with a particle size larger than the set aperture value are discharged into the slag screening and crushing box 5 for further crushing and discharge or separation and discharge. The efficiency of screening and crushing is further improved, the failure rate is reduced, and the efficiency of excavation construction is improved. The set aperture value can be specifically determined according to actual needs or a limited number of tests.

[0053] The shield machine can more efficiently separate the slag quickly, store and automatically discharge large slag particles. As a result, it can be applied to construction environments with large slag particles in broken belts, pebble strata and other construction environments, solving the construction problem of stopping for maintenance and cleaning due to stone blocking the slurry pump. It can be disassembled and combined for use according to actual needs, and can be widely used in tunnel construction.

[0054] The cutter head 1 has a certain rock-breaking and cutting ability, and cuts the debris from the upper part of the tunnel face. The soil bin 2 has a certain container for storing debris, and stores the debris cut by the cutter head. The main screw conveyor 3 is in an inclined state, and the main screw conveyor 3 can mechanically convey and screen the debris, effectively avoiding excessive accumulation of debris in the soil bin. Figure 3 shown.

[0055] The main screw conveyor 3 is in an inclined state, and the entrance of the main screw conveyor 3 is connected to the soil bin 2. The main screw conveyor 3 also contains a screw conveyor observation window and inspection port 31, a telescopic structure 32, a main screw conveying shaft 33, a driving device 34 and a first gate device 35. The screw conveyor observation window and inspection port 31 are equipped with a mechanical device for observing whether the slag inside the screw conveyor is blocked and for maintenance. The telescopic structure 32 can move the barrel 36 along the axis. The telescopic structure 32 is equipped with a device for telescoping the screw shaft as a whole along the axis, which can realize the axial retreat of the screw conveyor and close the front gate for normal pressure maintenance of the screw conveyor. The main screw conveying shaft 33 is sleeved in the barrel 36, and the main screw conveying shaft 33 conveys the slag mechanically through the pitch. The driving device 34 can drive the main screw conveying shaft 33 to rotate and provide a power source for the main screw conveying shaft 33. The first gate device 35 is located at the second outlet 362. The first gate device 35 can open and close the second outlet 362. The first gate device 35 can be arranged in one or more paths according to the pressure.

[0056] like Figure 3 As shown, the shell 45 is a box body with a certain pressure bearing capacity and the ability to mechanically screen the slag particles and store the slag. A receiving cavity 46 is provided in the shell 45, and a second slag slurry inlet 41 and a second slag slurry outlet 44 are also provided on the shell 45. The quarrying inlet 42, the second slag slurry inlet 41 and the second slag slurry outlet 44 are all connected to the receiving cavity 46. The second slag slurry outlet 44 is provided with a second gate device 43, and the second gate device 43 can open and close the second slag slurry outlet 44.

[0057] The second outlet 362 of the main screw conveyor 3 is connected to the raw material inlet 54 of the slag screening and crushing box 5 through a stone discharge tube, and the stone discharge tube is in an inclined state. The second outlet 362 of the main screw conveyor 3 is higher than the raw material inlet 54 of the slag screening and crushing box 5. The stones 10 discharged from the second outlet 362 of the main screw conveyor 3 can fall into the raw material inlet 54 (and the upper cavity 5911) of the slag screening and crushing box 5 by gravity.

[0058] like Figure 3 to Figure 4As shown, the shield machine also includes a primary stone storage box 6, which includes a first box body 61, and a first stone storage inlet 62, an inspection port and a pressure detection device are provided on the first box body 61. The first stone storage inlet 62 is connected to the stone outlet 58 of the slag screening and crushing box 5. The first box body 61 is connected to a primary screw conveyor 63, which is in an inclined state. The primary screw conveyor 63 includes a primary screw conveying shaft 631, a primary screw driving device 632 and a primary screw machine outlet 633. The primary screw driving device 632 can drive the primary screw conveying shaft 631 to rotate, and the primary screw conveying shaft 631 of the primary screw conveyor 63 can discharge the stones 10 in the first box body 61 from the primary screw machine outlet 633. The primary screw machine outlet 633 is connected to a primary gate device 64, and the primary gate device 64 can open and close the primary screw machine outlet 633. The inspection port and the pressure detection device can meet the needs of personnel to enter in emergency and maintenance.

[0059] like Figures 3 to 5 As shown, the first stone storage inlet 62 can be lower than the stone outlet 58 of the slag screening and crushing box 5, and the first stone storage inlet 62 and the stone outlet 58 of the slag screening and crushing box 5 can be directly connected, and the stones 10 discharged from the stone outlet 58 of the slag screening and crushing box 5 can fall into the first stone storage inlet 62 of the primary stone storage box 6 (i.e., the primary stone storage box 6) by gravity. Alternatively, the first stone storage inlet 62 and the stone outlet 58 can also be connected by a closed conveying mechanism, and the closed conveying mechanism can convey the stones 10 discharged from the stone outlet 58 of the slag screening and crushing box 5 to the first stone storage inlet 62 of the primary stone storage box 6.

[0060] like Figures 3 to 6 As shown, the shield machine can also include a secondary stone storage box 7, the secondary stone storage box 7 includes a second box body 71, the second box body 71 is provided with a second stone storage entrance 72 and an inspection port and a pressure detection device, the second stone storage entrance 72 is connected to the primary screw machine outlet 633 of the primary screw conveyor 63, the second box body 71 is connected to the secondary screw conveyor 73, the secondary screw conveyor 73 is in an inclined state, the secondary screw conveyor 73 includes a secondary screw conveying shaft 731, a secondary screw driving device 732 and a secondary screw machine outlet 733, the secondary screw driving device 732 can drive the secondary screw conveying shaft 731 to rotate, the secondary screw conveyor 73 can discharge the stones 10 in the second box body 71 from the secondary screw machine outlet 733, the secondary screw machine outlet 733 is connected to a secondary gate device 74, and the secondary gate device 74 can open and close the secondary screw machine outlet 733. The inspection port and the pressure detection device can meet the needs of personnel entry in emergency and maintenance.

[0061] The shield machine may further include a stone transport box 9, which may be located directly below the secondary screw machine outlet 733 of the secondary screw conveyor 73, and the stones 10 discharged from the secondary screw machine outlet 733 of the secondary screw conveyor 73 may fall into the stone transport box 9. When the stones 10 in the stone transport box 9 reach a preset weight, the stone transport box 9 and the stones 10 may be transported to the ground. The stone transport box 9 is placed directly below the secondary screw machine outlet 733 of the secondary screw conveyor 73 again.

[0062] like Figures 4 to 7 As shown, the shield machine also includes a gas storage and exhaust system 8, which includes a collecting tank 83, and the collecting tank 83 includes a collecting inlet 81 and a collecting outlet 82. The collecting inlet 81 and the collecting outlet 82 are both provided with gate devices. The collecting inlet 81 is connected to the first box body 61 and the second box body 71 through a pipeline 84. Part of the gas and liquid in the first box body 61 and the second box body 71 can enter the collecting tank 83 through the pipeline 84. The collecting tank 83 is provided with a detection device 85, and the detection device 85 can detect the liquid level and pressure in the collecting tank 83.

[0063] The gas storage and exhaust system 8 can effectively remove the slurry and gas from the slag screening and crushing box 5, the first-level stone storage box 6 and the second-level stone storage box 7 to avoid cavitation of the mud and water circulation system. The detection device 85 can effectively monitor the pressure changes in the box chamber and provide data reference for the opening and closing of the gate. The pipeline 84 and the gate valve are the pipeline connections for slurry discharge and exhaust; the collection tank 83 can be a transfer station for storing and discharging gas and slurry.

[0064] The opening and closing and interlocking of the primary gate device 64 and the secondary gate device 74 are controlled by the gas storage and exhaust system 8. It is ensured that the pressure of the circulation system does not drop and the gas is discharged. Thus, continuous operation with pressure can be ensured to continuously discharge stones. In addition, the primary stone storage box 6 and the secondary stone storage box 7 can also be replaced by a belt conveyor.

[0065] The working process of the shield machine and the slag screening and crushing box is introduced below.

[0066] The cutter head 1 is used to cut the debris from the upper part of the tunnel face, and the debris falls into the soil bin 2 by gravity. The debris in the soil bin 2 is discharged to the outside through the main screw conveyor 3.

[0067] During the process of discharging slag by the main screw conveyor 3, small particles of slag (stones 10) in the slag can enter the quarrying box 4 through the screening mesh plate 363 and the first outlet 361. The screening mesh plate 363 performs the first screening on the slag, and the slag flushing slurry enters the quarrying box 4 from the second slag flushing slurry inlet 41. The slag flushing slurry carries small particles of slag and enters the slag discharge system of the shield machine through the second slag flushing slurry outlet 44 and the slag discharge pipeline in turn, and is finally discharged to the ground.

[0068] During the process of discharging the slag from the main screw conveyor 3, the large-grained slag (stones 10) in the slag moves to the top of the main screw conveyor 3, and the large-grained slag (stones 10) in the slag can enter the slag screening and crushing box 5 from the second outlet 362 and the raw material inlet 54 by gravity, and the large-grained stone 10 falls on the roller 561, and the roller drive mechanism 562 can drive the multiple rollers 561 to rotate, so that the stones 10 on the multiple rollers 561 move backward. When the large-grained stone 10 is located between the two clamping plates 571, the clamping plate drive mechanism 572 drives the two clamping plates 571 to approach each other to crush the stone 10. The crushed large-particle stones 10 are formed into small-particle stones 10, and the small-particle stones 10 pass through the gap between two adjacent rollers 561 and fall into the lower cavity 5912. The multiple rollers 561 screen the stones 10, and the large-particle stones 10 that are not crushed or the stones 10 that do not pass between two adjacent rollers 561 continue to move backward under the action of the rollers 561. The crushed large-particle stones 10 are formed into small-particle stones 10, and the small-particle stones 10 pass through the gap between two adjacent rollers 561 and fall into the lower cavity 5912. Finally, the large-particle stones 10 that are not crushed or the stones 10 that do not pass between two adjacent rollers 561 will be discharged from the stone outlet 58. The slag slurry enters the lower cavity 5912 from the first slag slurry inlet 51, and the slag slurry carries the small-particle stones 10 in the lower cavity 5912 through the first slag slurry outlet 53 and the slag discharge pipeline to enter the slag discharge system of the shield machine, and is finally discharged to the ground. The slag screening and crushing box 5 performs a second screening of the slag, effectively reducing the working time of the crushing device; the large-particle slag passes through the multi-stage crushing device, effectively multi-stage crushing of the large-particle slag with low hardness, reducing the amount of large-particle slag and increasing the service life of the slag screening and crushing box 5.

[0069] The large and hard stones 10 discharged from the stone outlet 58 enter the first stone storage box 6 through the first stone storage inlet 62 by gravity, and the first screw conveying shaft 631 of the first screw conveyor 63 discharges the stones 10 in the first box 61 from the first screw machine outlet 633.

[0070] The stones 10 discharged from the primary stone storage box 6 enter the secondary stone storage box 7 through the second stone storage entrance 72, and the secondary screw conveyor 73 discharges the stones 10 in the second box body 71 from the secondary screw machine outlet 733, and the stones 10 discharged by the secondary screw conveyor 73 can fall into the stone transport box 9.

[0071] The shield machine is capable of meeting the requirements of a slag crushing and screening box for improving the excavation efficiency of the circulation system, and the shield machine and construction excavation plan equipped with the above-mentioned slag crushing and screening box can automatically discharge large-particle slag without stopping the machine, which can effectively improve the construction excavation of the slurry shield in broken belt formations, pebble formations and other formations where the heading face is prone to collapse.

[0072] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope of the present invention. In addition, the technical features of the present invention can be freely combined with each other, with technical features and technical solutions, with technical solutions and embodiments.

Claims

1. A slag screening and crushing box, characterized in that: The slag screening and crushing box comprises an outer box body (59), wherein the outer box body (59) contains an inner cavity (591) and a roller screening device (56), wherein the inner cavity (591) is divided into an upper cavity (5911) and a lower cavity (5912) by the roller screening device (56), wherein the roller screening device (56) contains a roller driving mechanism (562) and a plurality of rollers (561), wherein the plurality of rollers (561) are arranged at intervals from front to rear, wherein the roller driving mechanism (562) can drive the plurality of rollers (561) to rotate and cause the stones (10) on the plurality of rollers (561) to move backward, and wherein a crushing device (57) is arranged in the upper cavity (5911), wherein the crushing device (57) can crush the stones (10) on the rollers (561).

2. The slag screening and crushing box according to claim 1, characterized in that: The crushing device (57) comprises a clamping plate (571) and a clamping plate driving mechanism (572). The two clamping plates (571) are arranged at a distance from each other. The clamping plate driving mechanism (572) can drive the two clamping plates (571) to move closer to or farther from each other. The two clamping plates (571) can crush the stones (10) on the roller (561).

3. The slag screening and crushing box according to claim 2, characterized in that: The crushing device (57) further comprises a clamping plate seat (573), which is located above the clamping plates (571). The upper ends of the two clamping plates (571) are hinged to the two clamping plates (571), and the clamping plate driving mechanism (572) can drive the lower parts of the two clamping plates (571) to move closer to or away from each other.

4. The slag screening and crushing box according to claim 2, characterized in that: A plurality of crushing devices (57) are arranged in the upper cavity (5911), and the plurality of crushing devices (57) are arranged at intervals in a direction from front to rear. The splint driving mechanism (572) is a hydraulic cylinder, and each splint driving mechanism (572) is connected to a pressure protection module, and the pressure protection module can make the maximum output pressure value of the splint driving mechanism (572) less than or equal to a set pressure value.

5. The slag screening and crushing box according to claim 4, characterized in that: In the direction from front to back, the maximum output pressure value of the clamping plate driving mechanism (572) of the plurality of crushing devices (57) gradually increases.

6. The slag screening and crushing box according to claim 1, characterized in that: The front part of the outer box body (59) is provided with a raw material inlet (54), and the rear part of the outer box body (59) is provided with a stone outlet (58), and both the raw material inlet (54) and the raw material outlet (54) are connected to the upper cavity (5911).

7. The slag screening and crushing box according to claim 1, characterized in that: A first slag flushing slurry inlet (51) is provided at the front of the outer box body (59), and a first slag flushing slurry outlet (53) is provided at the rear of the outer box body (59). The first slag flushing slurry inlet (51) is connected to the upper cavity (5911) and / or the lower cavity (5912), and the first slag flushing slurry outlet (53) is connected to the lower cavity (5912).

8. A shield machine, characterized in that: The shield machine comprises a cutter head (1), a soil bin (2), a main screw conveyor (3), a quarrying box (4) and a slag screening and crushing box (5), wherein the slag screening and crushing box (5) is the slag screening and crushing box according to claim 1, the main screw conveyor (3) comprises a barrel (36), a first outlet (361) and a second outlet (362) are arranged on the barrel (36), the first outlet (361) is lower than the second outlet (362), a screening mesh plate (363) is arranged in the first outlet (361), the quarrying box (4) comprises a shell (45), a quarrying inlet (42) is arranged on the shell (45), the first outlet (361) is connected to the quarrying inlet (42), and the second outlet (362) is connected to the raw material inlet (54) of the slag screening and crushing box (5).

9. The shield machine according to claim 8, characterized in that: The main screw conveyor (3) is in an inclined state. The inlet of the main screw conveyor (3) is connected to the soil bin (2). The main screw conveyor (3) also comprises a telescopic structure (32), a main screw conveying shaft (33), a driving device (34) and a first gate device (35). The telescopic structure (32) can make the barrel (36) move along the axis. The main screw conveying shaft (33) is sleeved in the barrel (36). The driving device (34) can drive the main screw conveying shaft (33) to rotate. The first gate device (35) is located at the second outlet (362). The first gate device (35) can open and close the second outlet (362).

10. The shield machine according to claim 8, characterized in that: A housing cavity (46) is provided in the shell (45), and a second slag flushing slurry inlet (41) and a second slag flushing slurry outlet (44) are also provided on the shell (45); the quarrying inlet (42), the second slag flushing slurry inlet (41) and the second slag flushing slurry outlet (44) are all connected to the housing cavity (46); the second slag flushing slurry outlet (44) is provided with a second gate device (43), and the second gate device (43) can open and close the second slag flushing slurry outlet (44).

11. The shield machine according to claim 8, characterized in that: The shield machine further comprises a primary stone storage box (6), the primary stone storage box (6) comprising a first box body (61), a first stone storage inlet (62) being arranged on the first box body (61), the first stone storage inlet (62) being connected to a stone outlet (58) of a slag screening and crushing box (5), the first box body (61) being connected to a primary screw conveyor (63), the primary screw conveyor (63) comprising a primary screw conveyor shaft (631), a primary screw driving device (632) and a primary screw machine outlet (633), the primary screw conveyor (63) being capable of discharging stones (10) in the first box body (61), the primary screw machine outlet (633) being connected to a primary gate device (64), the primary gate device (64) being capable of opening and closing the primary screw machine outlet (633).

12. The shield machine according to claim 11, characterized in that: The shield machine further comprises a secondary stone storage box (7), the secondary stone storage box (7) comprising a second box body (71), a second stone storage inlet (72) being arranged on the second box body (71), the second stone storage inlet (72) being in communication with a primary screw machine outlet (633), the second box body (71) being connected with a secondary screw conveyor (73), the secondary screw conveyor (73) comprising a secondary screw conveyor shaft (731), a secondary screw driving device (732) and a secondary screw machine outlet (733), the secondary screw conveyor (73) being capable of discharging stones (10) in the second box body (71), the secondary screw machine outlet (733) being connected with a secondary gate device (74), and the secondary gate device (74) being capable of opening and closing the secondary screw machine outlet (733).

13. The shield machine according to claim 12, characterized in that: The shield machine further comprises an air storage and exhaust system (8), the air storage and exhaust system (8) comprising a collection tank (83), the collection tank (83) comprising a collection inlet (81) and a collection outlet (82), the collection inlet (81) being connected to the first tank body (61) and the second tank body (71) via a pipeline (84), and a detection device (85) being arranged on the collection tank (83), the detection device (85) being capable of detecting the liquid level and pressure in the collection tank (83).

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