Muck classifying, screening and crushing box and shield machine

Abstract

The application discloses a slag screening and crushing box and a shield tunneling machine, and belongs to the technical field of tunneling construction equipment. In order to solve the problem that the tunneling construction needs to be frequently stopped in the stratum containing large-particle slag, the slag screening and crushing box comprises an outer box body (59), the outer box body (59) contains an internal cavity (591) and a roller screening device (56), the internal cavity (591) is divided into an upper cavity (5911) and a lower cavity (5912) by the roller screening device (56), and a crushing device (57) is arranged in the upper cavity (5911). The slag screening and crushing box has the functions of screening and crushing, can screen out large-particle slag and small-particle slag, can crush the large-particle slag, can discharge the large-particle slag which cannot be crushed, can improve the screening and crushing efficiency, can reduce the failure rate, and can improve the tunneling construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunneling construction equipment, in particular to a slag screening and crushing box and a shield tunneling machine. BACKGROUND

[0002] The slurry balance type shield tunneling machine is limited in particle size by the slurry pump of the ring flow system, and when the construction process is carried out in the composite stratum, broken zone, gravel stratum and other working conditions, the slurry pump is often blocked, which seriously affects the construction tunneling. In order to avoid the blockage of the slurry pump by the slag, it is common to add a stone box, a screening box and other measures in front of the slurry pump. However, due to the need to maintain a certain pressure (about 6bar-12bar) during the construction tunneling of the slurry shield machine, and the large amount of slag discharged per ring, when the construction is carried out in the gravel stratum or broken zone stratum containing large particle slag (or slag stone), the large particle slag (or slag stone) will quickly fill the stone box or screening box, and it is necessary to stop the machine for stone removal, which will greatly reduce the tunneling efficiency. SUMMARY

[0003] In order to solve the problem of frequent stoppage during the construction of the tunneling machine in the stratum containing large particle slag, the present application provides a slag screening and crushing box and a shield tunneling machine. The slag screening and crushing box has screening and crushing functions, which can not only screen out large particle slag and small particle slag, but also crush large particle slag, and can discharge large particle slag that cannot be crushed. The efficiency of screening and crushing can be improved, the failure rate can be reduced, and the efficiency of tunneling construction can be improved.

[0004] The technical scheme adopted by the embodiment of the present application to solve the technical problem is as follows:

[0005] A slag screening and crushing box, comprising an outer box body, the outer box body containing an internal cavity and a roller screening device, the internal cavity being divided into an upper cavity and a lower cavity by the roller screening device, the roller screening device containing a roller drive mechanism and a plurality of rollers, the plurality of rollers being arranged in a forward direction, the roller drive mechanism being capable of driving the plurality of rollers to rotate and moving the stones on the plurality of rollers backward, and the upper cavity being provided with a crushing device capable of crushing the stones on the rollers.

[0006] A shield tunneling machine, comprising a cutter head, a soil bin, a main screw conveyor, a stone box and a slag screening and crushing box, the slag screening and crushing box being the above-mentioned slag screening and crushing box, the main screw conveyor containing a barrel, the barrel being provided with a first outlet and a second outlet, the first outlet being lower than the second outlet, the first outlet being provided with a screening mesh plate, the stone box containing a shell, the shell being provided with a stone inlet, the first outlet being in communication with the stone inlet, and the second outlet being in communication with a raw material inlet of the slag screening and crushing box.

[0007] The beneficial effects of the embodiment of the present application are:

[0008] 1. The application discloses a complete design and construction method for solving the construction difficulty of frequent shutdown of a broken stratum and a pebble stratum by adopting large-particle muck screening, large-particle muck centralized crushing, hard muck storage and on-site quarrying.

[0009] 2. The application discloses a method for processing different particle mucks and different hardness mucks by adopting multi-stage muck screening, crushing and quarrying, so as to improve the muck processing efficiency and the operation stability of each component.

[0010] 3. The muck screening and crushing box limits the oil pressure step size of the multi-stage crushing device oil cylinder, realizes multi-stage crushing of muck with a hardness lower than a certain value, discharges muck with a particle size lower than a certain value after crushing, stores large-particle hard muck, and solves the construction difficulties of low muck screening efficiency, poor screening effect and muck accumulation and blocking of the screening box.

[0011] 4. The application discloses an automatic normal-pressure quarrying device of a series connection type screw conveying device, and proposes an automatic muck transfer method for large-particle muck without shutdown, so as to solve the construction difficulty of frequent shutdown of a slurry shield caused by muck blocking.

[0012] 5. The application discloses a gas storage and exhaust system, and proposes a pressure detection and gate control system, so as to solve the safety of automatic muck discharge and the safety risk of a cavitation slurry circulation system.

[0013] 6. The application can effectively improve the tunneling efficiency of a slurry shield in a large-particle muck poor stratum, solve the construction difficulty under such working conditions, greatly save manpower, material resources and construction cost, and greatly improve the construction efficiency. With more and more application of slurry tunnel engineering, the application range and use value of the application are also wider and wider. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of the application are used to provide further understanding of the application, the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application.

[0015] Figure 1 is a schematic view of the muck screening and crushing box.

[0016] Figure 2 is a sectional view along Figure 1 A-A direction.

[0017] Figure 3 is a schematic view of the shield machine.

[0018] Figure 4 is a schematic view of the connection of the first-stage stone storage box and the second-stage stone storage box.

[0019] Figure 5 is a sectional view alongFigure 4 A cross-sectional view along the direction of B-B.

[0020] Figure 6 is a schematic view of the collecting tank. Figure 4 A cross-sectional view along the direction of C-C.

[0021] Figure 7 is a schematic view of the collecting tank.

[0022] Reference signs are explained as follows:

[0023] 1, cutter head; 2, soil bin; 3, main screw conveyor; 4, stone collecting box; 5, slag soil screening and crushing box; 6, first-stage stone storage box; 7, second-stage stone storage box; 8, gas storage and exhaust system; 9, stone conveying box; 10, stone block;

[0024] 31, screw conveyor observation window and access hole; 32, telescopic structure; 33, screw conveying shaft; 34, driving device; 35, first gate device; 36, barrel;

[0025] 41, second slag flushing slurry inlet; 42, stone collecting inlet; 43, second gate device; 44, second slag flushing slurry outlet; 45, shell; 46, containing cavity;

[0026] 51, first slag flushing slurry inlet; 52, access hole 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 block outlet; 59, outer box;

[0027] 61, first box; 62, first stone storage inlet; 63, first-stage screw conveyor; 64, first-stage gate device;

[0028] 71, second box; 72, second stone storage inlet; 73, second-stage screw conveyor; 74, second-stage gate device;

[0029] 81, collecting inlet; 82, collecting outlet; 83, collecting tank; 84, pipeline; 85, detection device;

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

[0031] 561, roller; 562, roller driving mechanism;

[0032] 571, clamp plate; 572, clamp plate driving mechanism; 573, clamp 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, first-stage screw conveyor outlet;

[0035] 731. Secondary screw conveying shaft; 732. Secondary screw driving device; 733. Secondary screw conveyor outlet. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to facilitate understanding and description, the following description of the present invention adopts an absolute position relationship. Unless otherwise specified, the directional word "upper" means Figure 3 The directional word "下" indicates the upper direction. Figure 3 The downward direction in the word "left" means perpendicular to Figure 3 The direction of the paper and points to the outside of the paper. The directional word "right" means perpendicular to Figure 3 The paper surface and points to the inside of the paper surface. The directional word "front" means Figure 3 The left direction in the sentence, the directional word "后" indicates Figure 3 The present invention is described from the perspective of the reader or user, but the above-mentioned directional terms should not be understood or interpreted as limiting the scope of protection of the present invention. The dimensions and angles of the components herein can be determined by those skilled in the art based on actual needs or limited experiments.

[0038] like Figures 1 to 2 As shown, a slag screening and crushing box described in an embodiment of the present invention includes an outer box body 59, which contains an internal cavity 591 and a roller screening device 56. The internal cavity 591 is divided into an upper cavity 5911 and a lower cavity 5912 by the roller screening device 56. The roller screening device 56 contains a roller driving mechanism 562 and a plurality of rollers 561. The plurality of rollers 561 are arranged at intervals from front to rear. The roller driving 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 provided in the upper cavity 5911, and the crushing device 57 can crush the stones 10 on the rollers 561.

[0039] The slag screening and crushing box contains a roller screening device 56 and a crushing device 57, as the first invention point of the present application, 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 out large-particle slag and small-particle slag, but also crush large-particle slag, and can further discharge large-particle slag that cannot be crushed, which can improve the efficiency of screening and crushing, reduce the failure rate, and improve the efficiency of tunneling construction.

[0040] As shown in Figures 1 to 2 The crushing device 57 contains a clamp plate 571 and a clamp plate driving mechanism 572, the two clamp plates 571 are arranged left and right, and the clamp plate 571 is a composite material with a certain hardness to improve the crushing effect. The clamp plate driving mechanism 572 can drive the two clamp plates 571 to move closer or farther away from each other, and the two clamp plates 571 can crush the stones 10 on the roller 561. For example, when the large-particle stones 10 are located between the two clamp plates 571, the two clamp plates 571 can be crushed by moving closer to each other.

[0041] The crushing device 57 also contains a clamp plate seat 573, which is located above the clamp plate 571, and the upper ends of the two clamp plates 571 are hinged to the clamp plate seat 573. The two clamp plate driving mechanisms 572 correspond to the two clamp plates 571 one by one, the upper end of the clamp plate driving mechanism 572 is hinged to the outer box body 59, and the upper end of the clamp plate driving mechanism 572 is hinged to the clamp plate 571. The clamp plate driving mechanism 572 can drive the lower parts of the two clamp plates 571 to move closer or farther 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 in the front-to-back direction. The clamp plate driving mechanism 572 can be a hydraulic cylinder. In order to protect the crushing device 57, each clamp plate driving mechanism 572 is connected with a pressure protection module, which can adopt the prior art. The pressure protection module can make the maximum output pressure value of the clamp plate driving mechanism 572 less than or equal to the set pressure value, which can be determined according to actual needs or limited times of trial. In the front-to-back direction, the maximum output pressure value of the clamp plate driving mechanism 572 of the plurality of crushing devices 57 gradually increases.

[0043] As shown in Figures 1 to 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 determined according to actual needs or limited times of tests. The roller driving mechanism 562 can drive the plurality of rollers 561 to rotate clockwise, so that the stone blocks 10 on the plurality of rollers 561 can move backward. The roller 561 has wear resistance, and the roller driving mechanism 562 can include a motor and a chain transmission assembly. The plurality of rollers 561, the chain transmission assembly and the motor are sequentially connected.

[0044] As a second inventive point of the present application, since each clamping plate driving mechanism 572 is connected with a pressure protection module, the stone block 10 with a hardness value less than a set hardness value can be crushed by the clamping plate 571, and the stone block 10 with a hardness value greater than the set hardness value cannot be crushed by the clamping plate 571. The stone block 10 with a particle size less than the set distance value can fall into the lower cavity 5912 through the distance between two rollers 561, and the stone block 10 with a particle size greater than the set distance value cannot. Finally, the stone block 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 stone block outlet 58. The muck screening and crushing box screens and crushes the stone block 10 with a hardness value less than the set hardness value, and discharges the stone block 10 with a hardness value greater than the set hardness value, which can improve the efficiency of screening and crushing, reduce the failure rate, and improve the efficiency of tunneling construction. The set hardness value can be determined according to actual needs or limited times of tests.

[0045] 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 block outlet 58. The raw material inlet 54 and the raw material inlet 54 are in communication with the upper cavity 5911. The outer box body 59 is a box body with certain pressure bearing capacity, mechanical screening of muck particle size, crushing of certain hardness of large particle muck, and storage of different particle size muck. The lower part of the outer box body 59 is provided with an inspection opening and a pressure detection device 52, which can meet the personnel entering the outer box body 59 in emergency and inspection. The third gate device 55 is arranged at the raw material inlet 54, which can open and close the raw material inlet 54. The third gate device 55 can be closed when the muck screening and crushing box 5 is in a maintenance state, to ensure the safety of maintenance personnel.

[0046] As shown in FIG. 6, the muck screening and crushing box 5 is provided with a plurality of clamping plates 571, and each clamping plate 571 is connected with a clamping plate driving mechanism 572. The clamping plate driving mechanism 572 can drive the clamping plate 571 to rotate clockwise, so that the stone block 10 on the clamping plate 571 can move forward. Figures 1 to 2As shown, the front part of the outer box body 59 is provided with a first slurry flushing liquid inlet 51, and the rear part of the outer box body 59 is provided with a first slurry flushing liquid outlet 53, the first slurry flushing liquid inlet 51 is communicated with the upper cavity 5911 and / or the lower cavity 5912 (the first slurry flushing liquid inlet 51 is communicated with the upper cavity 5911, or the first slurry flushing liquid inlet 51 is communicated with the lower cavity 5912, or the first slurry flushing liquid inlet 51 is communicated with the upper cavity 5911 and the lower cavity 5912), and the first slurry flushing liquid outlet 53 is communicated with the lower cavity 5912.

[0047] The slurry screening and crushing box can realize multi-stage crushing of slurry below a certain hardness by limiting the oil pressure step size of the oil cylinder of the multi-stage crushing device, discharge of slurry below a certain particle size after crushing, and storage of hard slurry with large particles, thereby solving the construction problems of low slurry screening efficiency, poor screening effect, and slurry accumulation and clogging of the screening box.

[0048] The working process of the slurry screening and crushing box will be introduced below.

[0049] The large-particle stone 10 enters the slurry screening and crushing box from the raw material inlet 54, and falls on the roller shaft 561. The roller shaft driving mechanism 562 can drive the plurality of roller shafts 561 to rotate, so that the stone 10 on the plurality of roller shafts 561 moves backward. When the large-particle stone 10 is located between the two clamping plates 571, the clamping plate driving mechanism 572 drives the two clamping plates 571 to move close to each other to crush the stone 10. The crushed large-particle stone 10 forms small-particle stones 10, which pass through the spacing between adjacent two roller shafts 561 and fall into the lower cavity 5912. The plurality of roller shafts 561 screen the stone 10, and the large-particle stone 10 that is not crushed or does not pass through the spacing between adjacent two roller shafts 561 continues to move backward under the action of the roller shaft 561. The crushed large-particle stone 10 forms small-particle stones 10, which pass through the spacing between adjacent two roller shafts 561 and fall into the lower cavity 5912. Finally, the large-particle stone 10 that is not crushed or does not pass through the spacing between adjacent two roller shafts 561 will be discharged from the stone outlet 58.

[0050] The slurry flushing liquid enters the lower cavity 5912 from the first slurry flushing liquid inlet 51, and the small-particle stones 10 in the lower cavity 5912 are carried by the slurry flushing liquid to pass through the first slurry flushing liquid outlet 53 and the slurry discharge pipeline in turn, enter the slurry discharge system of the shield machine, and finally be discharged to the ground.

[0051] A shield machine will be introduced below. Figure 3As shown, the shield machine includes a cutter head 1, a soil bin 2, a main screw conveyor 3, a stone box 4, and a muck screening and crushing box 5, which is the muck screening and crushing box described above. The main screw conveyor 3 contains a machine barrel 36, which is provided with a first outlet 361 and a second outlet 362. The first outlet 361 is lower than the second outlet 362, and the first outlet 361 is provided with a screening mesh plate 363. The stone box 4 contains a shell 45, which is provided with a stone inlet 42. The first outlet 361 is in communication with the stone inlet 42, and the second outlet 362 is in communication with a raw material inlet 54 of the muck 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 a third inventive point of the present application, the aperture of the screening mesh plate 363 is smaller than a set aperture value. The screening mesh plate 363 can perform a first screening on the muck, and the stone 10 with a particle size smaller than the set aperture value is discharged into the stone box 4 by gravity, and then discharged efficiently through a muck discharge pipeline, avoiding blockage. The stone 10 with a particle size larger than the set aperture value is discharged into the muck 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 tunneling construction is improved. The set aperture value can be determined according to actual needs or a limited number of experiments.

[0053] The shield machine can more efficiently realize rapid separation of muck, storage of large-particle muck, and automatic discharge. As a result, it can be applied to construction environments with large-particle muck in broken zones, gravel strata, and the like, solving the construction problem of downtime for maintenance and cleaning caused by blockage of the muck discharge pump by stones. It can be split and used in combination according to actual needs, and can be widely applied to tunnel construction.

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

[0055] ​The main screw conveyor 3 is in an inclined state, the inlet of the main screw conveyor 3 is communicated with the soil bin 2, and the main screw conveyor 3 further comprises a screw conveyor observation window and an inspection opening 31, an extension structure 32, a main screw conveying shaft 33, a driving device 34 and a first gate device 35. The screw conveyor observation window and the inspection opening 31 are provided with mechanical devices for observing whether the inside of the screw conveyor is blocked by the soil and for maintenance. The extension structure 32 can move the cylinder 36 along the axis, and the extension structure 32 is provided with a device for extending the screw shaft along the axis as a whole, so that the screw conveyor can be retracted axially, the front gate is closed, and the screw conveyor is maintained at normal pressure. The main screw conveying shaft 33 is sleeved in the cylinder 36, and the main screw conveying shaft 33 transports the soil through the mechanical type through the pitch. The driving device 34 can drive the main screw conveying shaft 33 to rotate, and provides a power source for the main screw conveying shaft 33. The first gate device 35 is located at the second outlet 362, and 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 rows according to the pressure.

[0056] As shown in Figure 3 The shell 45 is a box body with a certain pressure-bearing capacity, capable of mechanically screening the particle size of the soil and storing the soil. The shell 45 is provided with a containing cavity 46, and the shell 45 is further provided with a second slag slurry inlet 41 and a second slag slurry outlet 44. The quarry inlet 42, the second slag slurry inlet 41 and the second slag slurry outlet 44 are all communicated with the containing cavity 46, and the second slag slurry outlet 44 is provided with a second gate device 43, which can open and close the second slag slurry outlet 44.

[0057] The second outlet 362 of the main screw conveyor 3 is connected with the raw material inlet 54 of the soil screening and crushing box 5 through a stone discharge cylinder, the stone discharge cylinder 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 soil screening and crushing box 5, and the stone blocks 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 soil screening and crushing box 5 by gravity.

[0058] As shown in Figures 3 to 4As shown, the shield tunneling machine further comprises a first stone storage tank 6, which comprises a first tank body 61, wherein a first stone storage inlet 62 and an inspection opening and pressure detection device are arranged on the first tank body 61, the first stone storage inlet 62 is communicated with the stone outlet 58 of the muck screening and crushing tank 5, the first tank body 61 is connected with a first screw conveyor 63, the first screw conveyor 63 is in an inclined state, the first screw conveyor 63 comprises a first screw conveying shaft 631, a first screw driving device 632 and a first screw conveyor outlet 633, the first screw driving device 632 can drive the first screw conveying shaft 631 to rotate, the first screw conveying shaft 631 of the first screw conveyor 63 can discharge the stones 10 in the first tank body 61 from the first screw conveyor outlet 633, the first screw conveyor outlet 633 is connected with a first gate device 64, and the first gate device 64 can open and close the first screw conveyor outlet 633. The inspection opening and pressure detection device can meet the entry of personnel in emergency and maintenance.

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

[0060] As shown in Figures 3 to 6 , the shield tunneling machine can further comprise a second stone storage tank 7, which comprises a second tank body 71, wherein a second stone storage inlet 72 and an inspection opening and pressure detection device are arranged on the second tank body 71, the second stone storage inlet 72 is communicated with the first screw conveyor outlet 633 of the first screw conveyor 63, the second tank body 71 is connected with a second screw conveyor 73, the second screw conveyor 73 is in an inclined state, the second screw conveyor 73 comprises a second screw conveying shaft 731, a second screw driving device 732 and a second screw conveyor outlet 733, the second screw driving device 732 can drive the second screw conveying shaft 731 to rotate, the second screw conveyor 73 can discharge the stones 10 in the second tank body 71 from the second screw conveyor outlet 733, the second screw conveyor outlet 733 is connected with a second gate device 74, and the second gate device 74 can open and close the second screw conveyor outlet 733. The inspection opening and pressure detection device can meet the entry of personnel in emergency and maintenance.

[0061] The shield machine can further include a stone transport box 9, which can 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 can 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 can be transported to the ground. The stone transport box 9 is repositioned directly below the secondary screw machine outlet 733 of the secondary screw conveyor 73.

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

[0063] The gas storage and exhaust system 8 can effectively remove the slurry and gas in the muck screening and crushing box 5, the first stone storage box 6, and the second stone storage box 7, and avoid the gas cavitation mud water circulation system. The detection device 85 can effectively monitor the pressure change 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 connection for slurry and gas exhaust; the collection tank 83 can be a transfer station for gas and slurry storage and discharge.

[0064] The opening and closing of the primary gate device 64 and the secondary gate device 74 are controlled through the gas storage and exhaust system 8. The pressure of the circulation system is not reduced, and the gas is removed. Thus, continuous operation under pressure can be ensured to continuously discharge stones. In addition, the first stone storage box 6 and the second stone storage box 7 can also be replaced by a belt conveyor.

[0065] The working process of the shield machine and the muck screening and crushing box will be introduced below.

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

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

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

[0069] The large particles and hard stone blocks 10 discharged from the stone block 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 stone blocks 10 in the first box body 61 from the first screw machine outlet 633.

[0070] The stone blocks 10 discharged from the first stone storage box 6 enter the second stone storage box 7 through the second stone storage inlet 72, and the second screw conveyor 73 discharges the stone blocks 10 in the second box body 71 from the second screw machine outlet 733, and the stone blocks 10 discharged from the second screw conveyor 73 can fall into the stone conveying box 9.

[0071] The shield machine can meet the muck crushing and screening box for improving the tunneling efficiency of the circulating system, and the shield machine and construction tunneling scheme carrying the above muck crushing and screening box for automatic discharge of large particles of muck without stopping, which can effectively improve the construction tunneling of the slurry shield in the stratum with broken stratum, pebble stratum and other face collapse stratum.

[0072] The above merely illustrates the specific embodiments of the present application, and cannot be used to limit the scope of the present application, so the replacement of equivalent components, or equivalent changes and modifications made within the scope of protection of the present application, should still belong to the scope of the present application. In addition, the technical features in the present application can be freely combined between technical features and technical features, technical features and technical solutions, technical solutions and technical solutions, embodiments and embodiments.

Claims

1. A shield machine, characterized in that: The shield machine comprises a cutterhead (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) includes an outer box body (59), the outer box body (59) contains an internal cavity (591) and a roller screening device (56), the internal cavity (591) is divided into an upper cavity (5911) and a lower cavity (5912) by the roller screening device (56), the roller screening device (56) contains a roller driving mechanism (562) and a plurality of rollers (561), the plurality of rollers (561) are arranged at intervals from front to rear, the roller driving mechanism (562) can drive the plurality of rollers (561) to rotate and make the stones (10) on the plurality of rollers (561) move backward, and a crushing device (57) is provided in the upper cavity (5911), and the crushing device (57) can crush the stones (10) on the rollers (561); The main screw conveyor (3) includes a barrel (36), a first outlet (361) and a second outlet (362) are provided on the barrel (36), 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 communicated with the quarrying inlet (42), and the second outlet (362) is communicated with the raw material inlet (54) of the slag screening and crushing box (5); The crushing device (57) includes a clamping plate (571) and a clamping plate driving mechanism (572), wherein the two clamping plates (571) are spaced apart from each other, and the clamping plate driving mechanism (572) can drive the two clamping plates (571) to move closer to or farther from each other, and the two clamping plates (571) can crush the stones (10) on the roller (561); A plurality of crushing devices (57) are provided in the upper cavity (5911), and the plurality of crushing devices (57) are arranged at intervals in a direction from front to back. The splint drive mechanism (572) is a hydraulic cylinder, and each splint drive mechanism (572) is connected to a pressure protection module, and the pressure protection module can make the maximum output pressure value of the splint drive mechanism (572) less than or equal to a set pressure value.

2. The shield machine according to claim 1, characterized in that: The crushing device (57) further comprises 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 clamping plate seat (573), 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.

3. The shield machine according to claim 1, characterized in that: From the front to the rear, the maximum output pressure values ​​of the clamping plate driving mechanisms (572) of the plurality of crushing devices (57) gradually increase.

4. The shield machine according to claim 1, characterized in that: The front of the outer box body (59) is provided with a raw material inlet (54), and the rear 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 communicated with the upper cavity (5911).

5. The shield machine 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 in communication with the upper cavity (5911) and / or the lower cavity (5912), and the first slag flushing slurry outlet (53) is in communication with the lower cavity (5912).

6. The shield machine according to claim 1, 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 includes 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 move the barrel (36) 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).

7. The shield machine according to claim 1, characterized in that: A housing 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 in communication with the housing 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).

8. The shield machine according to claim 4, characterized in that: The shield machine further comprises a first-level stone storage box (6), the first-level stone storage box (6) comprising a first box body (61), a first stone storage inlet (62) being provided on the first box body (61), the first stone storage inlet (62) being communicated with a stone outlet (58) of the slag screening and crushing box (5), the first box body (61) being connected to a first-level screw conveyor (63), the first-level screw conveyor (63) comprising a first-level screw conveyor shaft (631), a first-level screw driving device (632) and a first-level screw machine outlet (633), the first-level screw conveyor (63) being capable of discharging stones (10) in the first box body (61), the first-level screw machine outlet (633) being connected to a first-level gate device (64), the first-level gate device (64) being capable of opening and closing the first-level screw machine outlet (633).

9. The shield machine according to claim 8, 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 provided on the second box body (71), the second stone storage inlet (72) being communicated with the primary screw machine outlet (633), the second box body (71) being connected to a secondary screw conveyor (73), the secondary screw conveyor (73) comprising a secondary screw conveying 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 to a secondary gate device (74), and the secondary gate device (74) being capable of opening and closing the secondary screw machine outlet (733).

10. The shield machine according to claim 9, characterized in that: The shield machine further includes an air storage and exhaust system (8), the air storage and exhaust system (8) including a collection tank (83), the collection tank (83) including a collection inlet (81) and a collection outlet (82), the collection inlet (81) being connected to the first box body (61) and the second box body (71) via a pipeline (84), and a detection device (85) being provided 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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