Screening and deslagging system and deslagging method for shield tunneling machine

Abstract

The invention relates to a screening and deslagging system and method for a shield tunneling machine, the deslagging system comprises a slag conveying device, the inlet end of the slag conveying device is connected with an air cushion bin or a soil bin of the shield tunneling machine, and two discharge pipelines are arranged at the outlet end of the slag conveying device; the two slag separation quarrying boxes correspond to the two discharge pipelines, each slag separation quarrying box comprises a screening area and a stone storage area, each screening area is provided with an upper-layer cavity and a lower-layer cavity, the discharge pipelines are communicated with the upper-layer cavities, and a screening partition plate is arranged between each upper-layer cavity and the corresponding lower-layer cavity; the screening partition plate is provided with screening holes allowing muddy water and slag stones with the first particle size to pass through, the upper-layer cavity communicates with the stone storage area, the stone storage area is provided with a slag discharging opening, and screening equipment used for screening slag stones with the second particle size and conveying the slag stones to the stone storage area is arranged in the upper-layer cavity; and the slag stone collecting box is used for collecting slag stone with the second particle size and is connected with the slag discharging opening. The technical problem that the tunneling efficiency is reduced due to the fact that the slag discharging process is discontinuous and the slag transferring process is not smooth is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel excavation, and further to a screening and slag discharging system and a slag discharging method for a shield machine, and in particular to a screening and slag discharging system and a slag discharging method for a high-efficiency and continuous slurry shield machine. Background Art

[0002] At present, shield machines can adapt to the complex geological conditions during tunnel construction and are increasingly widely used. However, with the continuous improvement of infrastructure levels, tunnel construction has also ushered in more challenges. When a slurry-water or dual-mode shield machine with slurry-water mode is excavated in a high-strength, large-size pebble stratum, a fault fracture zone, or a stratum with uneven hardness, the slag produced by the cutterhead cutting has the characteristics of large size, large quantity, high hardness, and various shapes. It is difficult to crush and discharge the above-mentioned types of slag in time by relying solely on a crusher, which can easily block the slurry discharge pipe, causing the pump to get stuck, sluggish discharge, and other situations, affecting construction efficiency. Therefore, in the existing shield structure, a quarrying box is often set in front of the slurry discharge pump to store large-size slag for subsequent transportation and discharge of slag from the tunnel.

[0003] However, when using quarrying boxes to store slag, the slag needs to be emptied manually through the maintenance window after it is full. The tunneling equipment of the shield machine must be shut down during the emptying process, and it cannot excavate while discharging slag. This will lead to problems such as discontinuous slag discharge and unsmooth slag transfer, reducing construction efficiency.

[0004] Therefore, the present invention proposes a shield machine screening slag discharging system and slag discharging method to overcome the defects of the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a shield machine screening slag discharge system and slag discharge method, which ensures the efficient transportation and discharge of slag by optimizing the slag discharge and transfer structure of the shield machine, solves the problem of frequent start-up and shutdown and maintenance of equipment caused by low discharge and transfer efficiency when the shield machine is excavating in a water-rich, high-pressure, slag-high-strength, and large-particle-size stratum, thereby reducing tunnel construction time (improving construction efficiency) and reducing construction costs.

[0006] The purpose of the present invention can be achieved by adopting the following scheme:

[0007] The present invention provides a shield machine screening and slag discharging system, the shield machine screening and slag discharging system comprising:

[0008] A slag conveying device, wherein the inlet end of the slag conveying device is connected to the air cushion bin or soil bin of the shield machine, and the outlet end of the slag conveying device is provided with at least two discharge pipelines that can be controlled to be on and off;

[0009] Two slag quarrying boxes corresponding to the two discharge pipelines one by one, each of the slag quarrying boxes comprising a screening area and a stone storage area, the screening area having an upper chamber and a lower chamber arranged up and down, the outlet of the discharge pipeline being communicated with the upper chamber, the upper chamber and the lower chamber being separated by a screening partition plate, the screening partition plate having a plurality of screening holes for muddy water and slag stones of a first particle size to pass through, the upper chamber being communicated with the stone storage area, so the stone storage area has a slag discharge port, the upper chamber being provided with a screening device for screening out slag stones of a second particle size and conveying them to the stone storage area;

[0010] A slag collection box, the slag collection box is connected to the slag discharge port, and the slag collection box is used to collect slag of the second particle size;

[0011] Wherein, the second particle size is larger than the first particle size.

[0012] In a preferred embodiment of the present invention, gates are provided on the discharge pipelines, and the gates on the two discharge pipelines are opened alternately to allow the two discharge pipelines to be alternately connected.

[0013] In a preferred embodiment of the present invention, the number of the gates on each of the discharge pipelines is at least two.

[0014] In a preferred embodiment of the present invention, the discharge pipeline is arranged to be inclined downward in the direction from the slag conveying equipment to the slag separation and quarrying box.

[0015] In a preferred embodiment of the present invention, the screening zone has a slurry discharge pipeline, and the slurry discharge pipeline is connected to the lower chamber in an on-off manner.

[0016] In a preferred embodiment of the present invention, the bottom surface of the stone storage area is smooth and inclined downward from the direction away from the slag collection box to the direction close to the slag collection box, and the slag discharge port is located at the bottom of the slag collection box and close to one side of the slag collection box, so that the slag of the second particle size can slide into the slag collection box.

[0017] In a preferred embodiment of the present invention, the slag conveying equipment includes a first conveyor and a second conveyor, the inlet end of the first conveyor is connected to the air cushion bin or soil bin of the shield machine, the outlet end of the first conveyor is connected to the inlet end of the second conveyor, the outlet end of the second conveyor extends to the top of the slag quarrying box, and the two discharge pipelines are symmetrically arranged at the lower part of the outlet end of the second conveyor;

[0018] From the air cushion bin or the soil bin to the second conveyor, the first conveyor extends obliquely upward, and / or, from the first conveyor to the slag quarrying box, the second conveyor extends in a horizontal direction.

[0019] In a preferred embodiment of the present invention, the shield machine screening and slag discharge system further comprises a first trailer, an equipment bridge and a second trailer, the first trailer is connected to the shield body of the shield machine, the second trailer is connected to the first trailer via the equipment bridge, and the slag separation and quarrying box and the slag collection box are both located in the second trailer;

[0020] At least a portion of the second conveyor is located above the first trailer and the equipment bridge, and a bracket is erected between the top of the first trailer and / or the top of the equipment bridge and the second conveyor.

[0021] In a preferred embodiment of the present invention, the shield machine screening and slag discharge system further comprises a material vehicle, and the material vehicle can be connected to the slag discharge port of the slag collection box;

[0022] And / or, the shield machine screening and slag discharge system also includes a pump truck, and the pump truck can be connected to the slurry discharge pipeline.

[0023] The present invention provides a shield machine screening and slag discharge method, which adopts the above-mentioned shield machine screening and slag discharge system to screen and discharge slag. The shield machine screening and slag discharge method comprises the following steps:

[0024] Step S1: the slag cut by the cutter head in the air cushion bin or soil bin of the shield machine is transported to two discharge pipelines by the slag conveying equipment; wherein, one of the two discharge pipelines is connected and the other is closed;

[0025] Step S2: discharging the slag and the rock to the screening area of ​​the slag and quarrying box through the discharge pipeline; wherein the muddy water and the slag and the rock of the first particle size enter the lower chamber from the upper chamber of the screening area through the screening partition plate; the slag and the rock of the second particle size in the upper chamber are transported to the stone storage area of ​​the slag and quarrying box through the screening equipment;

[0026] Step S3: After the rock storage area of ​​one of the slag-classifying and quarrying boxes is fully loaded, the on-off states of the two discharge pipelines are replaced, and the fully loaded rock storage area discharges the slag into the slag collection box, and the slag transported by the slag conveying equipment is discharged into the screening area of ​​the other slag-classifying and quarrying box;

[0027] Step S4: Repeat steps S2 to S3.

[0028] In a preferred embodiment of the present invention, in step S2 and step S3, the muddy water and the slag of the first particle size entering the lower chamber are transported to the outside of the tunnel by a pump truck; and / or the slag of the second particle size in the slag collection box is transported to the outside of the tunnel by a material truck.

[0029] In a preferred embodiment of the present invention, in step S2 and step S3, muddy water and slag of the first particle size are first discharged through the slurry discharge pipeline, and then slag of the second particle size is discharged to the slag collection box through the slag discharge port of the stone storage area.

[0030] As described above, the characteristics and advantages of the shield machine screening slag discharging system and slag discharging method of the present invention are:

[0031] The slag cut by the cutter disc is transported together with mud and water to the slag quarrying box through the slag conveying equipment, and first enters the screening area of ​​the slag quarrying box, and the mud and water and slag of the first particle size (i.e., small-size slag) can pass through the screening partition plate in the screening area and enter the lower chamber from the upper chamber of the screening area to centrally collect and discharge the mud and water and small-size slag; and the slag of the second particle size (i.e., large-size slag) remaining in the upper chamber is transported to the stone storage area of ​​the slag quarrying box through the screening equipment, and then transported to the slag collection box through the stone storage area for centralized collection and regular discharge. The present application collects and processes the slag in a graded manner, avoids the problem of low working efficiency when excavating strata with high slag strength and large particle size, avoids the occurrence of pipeline blockage, pump jamming, and discharge stagnation caused by large-size slag, avoids the frequent start and stop of equipment and frequent maintenance, effectively improves construction efficiency and reduces construction costs;

[0032] In addition, at least two discharge pipelines with controllable on / off are provided at the outlet end of the slag conveying equipment, and each discharge pipeline is equipped with a corresponding slag quarrying box (that is, the two slag quarrying boxes correspond to the two discharge pipelines one by one). During the operation, the two discharge pipelines are alternately switched on and off. When one slag quarrying box is in the state of collecting slag and rock, the other slag quarrying box is in the state of discharging slag and rock. The slag discharge system can continuously screen, collect and discharge slag and rock, ensuring the efficient transportation and discharge of slag, and solving the problem of frequent start-up and shutdown and maintenance of equipment due to low discharge and transportation efficiency when the shield machine is excavating in water-rich, high-pressure, high-strength slag and rock, and large-particle-size strata, thereby reducing tunnel construction time and construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0034] in:

[0035] Figure 1 It is a schematic diagram of the overall structure of the screening and slag-discharging system of the shield machine of the present invention;

[0036] Figure 2 for Figure 1 A partial enlarged view of the part where the slag conveying equipment is located;

[0037] Figure 3 for Figure 1 A partial enlarged view of the part where the middle slag quarrying box is located;

[0038] Figure 4 for Figure 1 A partial enlarged view of the part where the material cart is located;

[0039] Figure 5 for Figure 3 Cross-sectional view at the AA position;

[0040] Figure 6 for Figure 3 Cross-sectional view at the mid-BB position.

[0041] The accompanying drawings in the present invention are:

[0042] 1. Blade disc; 2. Shield;

[0043] 3. Mud and water tank; 4. Air cushion tank;

[0044] 5. Slag conveying equipment; 501. First conveyor;

[0045] 502, second conveyor; 503, support;

[0046] 504, discharge pipeline; 505, gate;

[0047] 6. Slag quarrying box; 601. Screening area;

[0048] 6011, upper chamber; 6012, lower chamber;

[0049] 6013, screen partition plate; 6014, slurry discharge pipeline;

[0050] 602, rock storage area; 6021, slag discharge port;

[0051] 603. Slag conveying pipeline; 7. First trailer;

[0052] 8. Equipment bridge; 9. Second trailer;

[0053] 10. Slag collection box; 11. Material truck;

[0054] 12. Pump truck. DETAILED DESCRIPTION

[0055] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0056] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0058] Implementation Method 1

[0059] like Figures 1 to 6 As shown, the present invention provides a shield machine screening and slag discharge system, which includes a slag conveying device 5, a slag collection box 10 and two slag separation and quarrying boxes 6. The slag conveying device 5 is connected to the shield body 2 of the shield machine, and the inlet end of the slag conveying device 5 is connected to the air cushion bin 4 or the soil bin of the shield machine. The outlet end of the slag conveying device 5 is provided with at least two discharge pipelines 504 whose on-off states can be controlled. The two slag separation and quarrying boxes 6 correspond to the two discharge pipelines 504 one by one, and the two slag separation and quarrying boxes 6 are respectively located below the outlets of the corresponding discharge pipelines 504, one slag separation and quarrying box 6 is connected to one discharge pipeline 504, and the other slag separation and quarrying box 6 is connected to the other discharge pipeline 504.

[0060] Each slag quarrying box 6 includes a screening area 601 and a stone storage area 602. The screening area 601 has an upper chamber 6011 and a lower chamber 6012 arranged up and down. The upper chamber 6011 is located above the lower chamber 6012. The outlet of the discharge pipeline 504 is connected to the upper chamber 6011. A screening partition plate 6013 is provided between the upper chamber 6011 and the lower chamber 6012. The screening partition plate 6013 has a slag passage for supplying mud water and slag of the first particle size. The upper chamber 6011 is connected with the stone storage area 602 through a slag conveying pipeline 603. A slag discharge port 6021 is provided at the bottom of the stone storage area 602. A screening device (not shown) for screening out slag stone of the second particle size and conveying it to the stone storage area 602 is provided in the upper chamber 6011. The slag stone collecting box 10 is located below the slag discharge port 6021. The slag stone collecting box 10 is connected to the slag discharge port 6021. The slag stone collecting box 10 is used to collect slag stone of the second particle size.

[0061] In the present invention, the second particle size is greater than the first particle size, that is, the slag of the first particle size is small-size slag, and the slag of the second particle size is large-size slag. The above-mentioned small-size slag is only compared with the above-mentioned large-size slag. The range of the first particle size and the second particle size can be determined according to the actual formation conditions and the slag discharge system itself (such as the slag conveying capacity of the slag conveying equipment 5, the inner diameter of the discharge pipeline 504, and the aperture of the sieve hole on the screen partition plate 6013). At the same time, the staff can also adjust the structure of the slag discharge system itself (such as the slag conveying capacity of the slag conveying equipment 5, the inner diameter of the discharge pipeline 504, and the aperture of the sieve hole on the screen partition plate 6013) to adapt to the slag of the first particle size and the slag of the second particle size of different sizes. For the present invention, it is sufficient to achieve the purpose of grading the slag of the first particle size and the slag of the second particle size.

[0062] In the present invention, the screening equipment may be but is not limited to a ball screen, and the ball screen is arranged in the upper chamber 6011 of the screening area 601. The ball screen can transport the large-particle slag transported from the outlet of the discharge pipeline 504 to the upper chamber 6011 to the stone storage area 602, while the muddy water and small-particle slag can pass through the ball screen and the screen partition plate 6013 in turn and fall into the lower chamber 6012 of the screening area 601, and then be discharged externally through the slurry discharge pipeline 6014.

[0063] The present invention transports the slag cut by the cutter head 1 together with muddy water to the slag quarrying box 6 through the slag conveying equipment 5, and first enters the screening area 601 of the slag quarrying box 6, and the muddy water and slag of the first particle size (i.e., small-size slag) can pass through the screening partition plate 6013 in the screening area 601 and enter the lower chamber 6012 from the upper chamber 6011 of the screening area 601, so as to centrally collect and discharge the muddy water and small-size slag; and the slag of the second particle size (i.e., large-size slag) remaining in the upper chamber 6011 is transported to the stone storage area 602 of the slag quarrying box 6 through the screening equipment, and then transported to the slag collection box 10 through the stone storage area 602 for centralized collection and regular discharge. The present application collects and processes slag of different particle size ranges in a graded manner, thereby avoiding the problem of low working efficiency when excavating strata with high slag strength and large particle size, and avoiding the problems of pipeline blockage, pump jam, and discharge stagnation easily caused by large-size slag. The occurrence of frequent start-up and shutdown and frequent maintenance of equipment is avoided, construction efficiency is effectively improved, and construction costs are reduced; in addition, at least two discharge pipelines 504 with controllable on / off are provided at the outlet end of the slag conveying equipment 5, and each discharge pipeline 504 is equipped with a corresponding slag quarrying box 6 (that is, the two slag quarrying boxes 6 correspond to the two discharge pipelines 504 one by one). During the operation, the two discharge pipelines 504 are alternately switched on and off. When one slag quarrying box 6 is in a slag collecting state, the other slag quarrying box 6 is in a slag discharge state, which can realize the continuous screening, collection and discharge of slag by the slag discharge system, ensure the efficient transportation and discharge of slag, and solve the problem of frequent start-up and shutdown and maintenance of equipment due to low discharge and transportation efficiency when the shield machine is excavating in a water-rich, high-pressure, slag-stone strong and large-particle-size stratum, so as to achieve the technical effect of reducing tunnel construction time and reducing construction costs.

[0064] In an optional implementation of the present invention, Figure 5 As shown, gates 505 are provided on the discharge pipelines 504, and the gates 505 on the two discharge pipelines 504 are opened alternately to make the two discharge pipelines 504 alternately conductive, so as to realize the alternating collection of slag by the two slag-classifying and quarrying boxes 6, that is, when one slag-classifying and quarrying box 6 is in a slag-classifying and quarrying state, the other slag-classifying and quarrying box 6 is always in a slag-classifying and quarrying state. Thus, the slag-classifying and quarrying system can continuously screen, collect and discharge slag, and avoid frequent start and stop of the equipment.

[0065] Further, such as Figure 5 As shown, at least two gates 505 are provided on each discharge pipeline 504. By providing multiple gates 505, the pressure-maintaining capacity can be improved when the gates 505 are closed. When one gate 505 cannot be closed normally due to a stone jam or other reasons, another gate 505 can also be closed to effectively prevent muddy water from gushing out.

[0066] Further, such as Figure 5 As shown, the discharge pipeline 504 is tilted downward from the slag conveying equipment 5 to the slag quarrying box 6, which can play a certain guiding role, so that the muddy water and slag in the discharge pipeline 504 enter the slag quarrying box 6 along the tilted direction of the discharge pipeline 504, thereby reducing the pumping requirements for muddy water and slag to a certain extent. Among them, a slag discharge valve (not shown) is provided at the slag discharge port 6021 of the stone storage area 602, and the slag discharge valves corresponding to the two slag quarrying boxes 6 are also alternately turned on and off. When the slag discharge valve of one slag quarrying box 6 is in an open state, that is, the stone storage area 602 of the slag quarrying box 6 is already in a fully loaded state and is discharging large-size slag into the slag collection box 10, the slag discharge valve of the other slag quarrying box 6 needs to be in a closed state at this time, so as to ensure that the large-size slag transported by the slag conveying equipment 5 can be collected in the stone storage area 602 of the other slag quarrying box 6, thereby ensuring the continuous transportation, collection and discharge of slag.

[0067] In an optional embodiment of the present invention, Figure 5 As shown, the screening area 601 has a slurry discharge pipeline 6014, one end of which is connected to the bottom of the lower chamber 6012 in an on-off manner, and muddy water and slag are transported out of the tunnel through the slurry discharge pipeline 6014. A slurry discharge pump and / or a valve are provided on the slurry discharge pipeline 6014 to realize on-off control of the slurry discharge pipeline 6014, so as to meet the requirements of pumping muddy water and slag out.

[0068] In an optional embodiment of the present invention, Figure 6 As shown, from the direction away from the slag collection box 10 to the direction close to the slag collection box 10, the bottom surface of the stone storage area 602 is smooth and tilted downward, and the slag discharge port 6021 is located at the bottom of the slag collection box 10 and close to one side of the slag collection box 10, that is, the slag collection box 10 is located below the stone storage area 602 of the two slag quarrying boxes 6 and located in the middle of the stone storage area 602 of the two slag quarrying boxes 6, so that the slag collection box 10 can collect the slag discharged from the two stone storage areas 602. The bottom surface of the stone storage area 602 is smooth and tilted downward, so that large-sized slag can slide along the bottom surface of the stone storage area 602 to the slag collection box 10 after entering the stone storage area 602, which is more convenient for the centralized collection of large-sized slag.

[0069] In an optional embodiment of the present invention, Figures 1 to 3As shown, the slag conveying equipment 5 includes a first conveyor 501 and a second conveyor 502. The inlet end of the first conveyor 501 is connected to the air cushion bin 4 or soil bin of the shield machine, and the outlet end of the first conveyor 501 is connected to the inlet end of the second conveyor 502. The outlet end of the second conveyor 502 extends to the top of the slag separation and quarrying box 6. Two discharge pipelines 504 are symmetrically arranged at the lower part of the outlet end of the second conveyor 502; from the air cushion bin 4 or soil bin to the second conveyor 502, the first conveyor 501 extends obliquely upward, and from the first conveyor 501 to the slag separation and quarrying box 6, the second conveyor 502 extends in the horizontal direction. Among them, the first conveyor 501 and / or the second conveyor 502 can be but not limited to a screw conveyor.

[0070] In an optional embodiment of the present invention, Figures 1 to 4 As shown, the shield machine screening slag discharge system also includes a first trailer 7, an equipment bridge 8 and a second trailer 9. The first trailer 7 is connected to the shield body 2 of the shield machine, and the second trailer 9 is connected to the first trailer 7 through the equipment bridge 8. The slag quarrying box 6 and the slag collection box 10 are both located in the second trailer 9. The first trailer 7, the equipment bridge 8 and the second trailer 9 can move synchronously with the shield body 2 of the shield machine in the tunnel. Among them, at least part of the second conveyor 502 is located above the first trailer 7 and the equipment bridge 8, and a bracket 503 is provided on the top of the first trailer 7 and / or the top of the equipment bridge 8. The second conveyor 502 is arranged on the top of the bracket 503, and the bracket 503 plays a role in stabilizing the support of the second conveyor 502.

[0071] In an optional embodiment of the present invention, Figure 1 , Figure 4 As shown, the shield machine screening and slag discharge system also includes a material truck 11, which can be connected to the slag discharge port of the slag collection box 10. The fully loaded slag collection box 10 can discharge large-sized slag to the material truck 11, and the large-sized slag is transported out of the tunnel through the material truck 11; and / or, the shield machine screening and slag discharge system also includes a pump truck 12, which can be connected to the slurry discharge pipeline 6014 to realize the discharge of mud and small-sized slag.

[0072] In the present invention, the shield machine includes a shield body 2 and a cutterhead 1 arranged in front of the shield body 2. The shield machine can be a slurry shield machine or an earth pressure shield machine. When the shield machine is a slurry shield machine, a slurry bin 3 and an air cushion bin 4 are arranged in the shield body 2 and behind the cutterhead 1, a slag conveying device 5 is located in the shield body 2 and connected to the shield body 2, and an inlet end of the slag conveying device 5 is connected to the air cushion bin 4 of the shield machine. When the shield machine is an earth pressure shield machine, a soil bin (not shown) is arranged in the shield body 2 and behind the cutterhead 1, a slag conveying device 5 is located in the shield body 2 and connected to the shield body 2, and an inlet end of the slag conveying device 5 is connected to the soil bin of the shield machine.

[0073] During the excavation process, when the slag cut by the cutter head 1 is mainly soft soil and small-sized slag, the soft soil and small-sized slag can be directly discharged out of the cave along the main slurry discharge pipeline with the slurry in the slurry bin 3; when the slag cut by the cutter head 1 is mainly large-sized slag, due to the size limitation of the slurry discharge pump and the main slurry discharge pipeline, the small-sized slag, large-sized slag and slurry will be transported to the slag classification and quarrying box 6 through the air cushion bin 4 and the slag conveying equipment 5 for classification. Among them, the small-sized slag and slurry enter the lower chamber 6012 from the upper chamber 6011 in the screening area 601 of the slag classification and quarrying box 6, and are discharged through the slurry discharge pipeline 6014, and the large-sized slag enters the stone storage area 602 of the slag classification and quarrying box 6 from the upper chamber 6011 of the screening area 601 for centralized collection, and is discharged from the stone storage area 602 to the slag collection box 10 for collection and external processing. During the processing, large-sized slag only enters the stone storage area 602 of the slag quarrying box 6 on one side for collection until the stone storage area 602 is full, the gate 505 on this side is closed and the slag discharge valve at the slag discharge port 6021 of the measuring stone storage area 602 is opened, and the large-sized slag in the stone storage area 602 is discharged to the slag collection box 10, and at the same time, the gate 505 on the discharge pipeline 504 on the other side is opened and the slag discharge valve at the slag discharge port 6021 of the measuring stone storage area 602 is closed, and the measuring stone storage area 602 collects large-sized slag until it is full.

[0074] Among them, the slag quarrying box 6 in the stone storage area 602 which is fully loaded first opens the slurry discharge pipeline 6014 to discharge muddy water and small-sized slag, and then opens the slag discharge valve at the slag discharge port 6021 of the stone storage area 602 to discharge large-sized slag into the slag collection box 10. After emptying, the slag discharge valve is closed, waiting for the stone storage area 602 on the other side to be filled and discharged. The slag quarrying boxes 6 on the left and right sides store and discharge alternately and operate continuously, thereby improving the excavation efficiency.

[0075] The characteristics and advantages of the shield machine screening slag discharge system of the present invention are:

[0076] 1. The screening and slag discharge system of the shield machine collects and processes slag of different particle size ranges in a graded manner, avoiding the problem of low working efficiency when excavating strata with high slag strength and large particle size, avoiding the occurrence of pipeline blockage, pump jam, and drainage stagnation caused by large-size slag, and avoiding frequent start-stop and frequent maintenance of equipment, effectively improving construction efficiency and reducing construction costs.

[0077] 2. Two discharge pipelines 504 are set in the screening and slag discharge system of the shield machine, which are alternately opened and closed. When one slag quarrying box 6 is in the state of collecting slag, the other slag quarrying box 6 is in the state of discharging slag, so that the slag discharge system can continuously screen, collect and discharge slag, ensure the efficient transportation and discharge of slag, and solve the problem of frequent start-up and shutdown and maintenance of equipment due to low discharge and transportation efficiency when the shield machine is excavating in water-rich, high-pressure, high-strength slag and large-particle strata, thereby achieving the technical effect of reducing tunnel construction time and reducing construction costs.

[0078] 3. The screening and slag discharge system of the shield machine solves the problem of frequent start-stop and maintenance of equipment due to low discharge and transportation efficiency when the slurry shield machine is excavating in strata with rich water, high pressure, high slag strength, large and large particle size, and various shapes, thereby reducing tunnel construction time and construction costs. At the same time, it optimizes the structure of shield machine slag discharge and transportation, ensuring the efficient discharge of mud and water and slag of different particle size ranges.

[0079] 4. In the screening and slag-discharging system of the shield machine, the slag conveying equipment 5 includes a first conveyor 501 and a second conveyor 502 connected to each other. In addition, the two slag-classifying and quarrying boxes 6 are provided to effectively increase the storage space for slag and stone.

[0080] 5. In the screening and slag discharge system of the shield machine, the slag separation and quarrying box 6 is arranged behind the slag conveying equipment 5 and is located in the second trailer 9. It does not need to occupy the compact space of the rear matching first trailer 7, thereby improving the space utilization rate of the equipment. It is particularly suitable for mud shield excavation construction containing large-size and high-strength slag and stone, effectively improving the reliability and efficiency of the shield machine construction and reducing product costs.

[0081] Implementation Method 2

[0082] The present invention provides a shield machine screening and slag discharge method, which adopts the above-mentioned shield machine screening and slag discharge system to screen and discharge slag. The shield machine screening and slag discharge method comprises the following steps:

[0083] Step S1: the slag cut by the cutter head 1 in the air cushion chamber 4 or the soil chamber of the shield machine is transported to two discharge pipelines 504 by the slag conveying equipment 5;

[0084] In the above step S1, one of the two discharge pipelines 504 is always kept in an on state, while the other discharge pipeline 504 is always kept in an off state;

[0085] Step S2: discharging the slag and rock into the screening area 601 of the slag and rock quarrying box 6 through the discharge pipeline 504;

[0086] The muddy water and the slag of the first particle size enter the lower chamber 6012 from the upper chamber 6011 of the screening area 601 through the screening partition plate 6013, and are temporarily stored in the lower chamber 6012 without being discharged; the slag of the second particle size in the upper chamber 6011 is transported to the stone storage area 602 of the slag quarrying box 6 through the screening equipment;

[0087] Step S3: After the rock storage area 602 of one slag quarrying box 6 is fully loaded, the on-off state of the two discharge pipelines 504 is replaced, and the fully loaded rock storage area 602 discharges the slag into the slag collecting box 10, and the slag transported by the slag conveying equipment 5 is discharged into the screening area 601 of another slag quarrying box 6;

[0088] Step S4: Repeat steps S2 to S3.

[0089] In an optional embodiment of the present invention, in step S2 and step S3, the muddy water and slag of the first particle size entering the lower chamber 6012 are transported to the outside of the tunnel by a pump truck 12; and / or, the slag of the second particle size in the slag collection box 10 is transported to the outside of the tunnel by a material truck 11.

[0090] In an optional embodiment of the present invention, in step S2 and step S3, when it is necessary to discharge muddy water, slag of the first particle size, and slag of the second particle size in the one-side slag quarrying box 6, muddy water and slag of the first particle size are first discharged through the slurry discharge pipeline 6014, and then the slag of the second particle size is discharged to the slag collection box 10 through the slag discharge port 6021 of the rock storage area 602. The water and soil pressure of the rock storage area 602 can be released, and the discharge efficiency is improved.

[0091] The shield machine screening and slag removal method of the present invention adopts a continuous process flow of alternating slag storage and discharge, has high operability, and compared with the process of first storing and then discharging, does not need to frequently start and stop the shield machine, thus saving time, improving excavation efficiency and reducing costs.

[0092] The shield machine screening and slag discharge method of the present invention has the same characteristics and advantages as the shield machine screening and slag discharge system mentioned above, which will not be described in detail here.

[0093] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0094] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0095] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A shield machine screening slag system, characterized in that: The shield machine screening and slag discharging system comprises: A slag conveying device (5), wherein the inlet end of the slag conveying device (5) is connected to the air cushion bin (4) or the soil bin of the shield machine, and the outlet end of the slag conveying device (5) is provided with at least two discharge pipelines (504) whose on / off can be controlled; Two slag separation and quarrying boxes (6) corresponding to the two discharge pipelines (504) one by one, each of the slag separation and quarrying boxes (6) comprising a screening area (601) and a stone storage area (602), the screening area (601) having an upper chamber (6011) and a lower chamber (6012) arranged up and down, the outlet of the discharge pipeline (504) being in communication with the upper chamber (6011), the upper chamber (6011) being in communication with the lower chamber (6012) 12) are separated by a screen partition plate (6013), the screen partition plate (6013) has a plurality of screening holes for allowing mud water and slag of the first particle size to pass through, the upper chamber (6011) is connected to the stone storage area (602), so the stone storage area (602) has a slag discharge port (6021), and the upper chamber (6011) is provided with a screening device for screening out slag of the second particle size and transporting it to the stone storage area (602); A slag collection box (10), the slag collection box (10) being connected to the slag discharge port (6021), the slag collection box (10) being used to collect slag of the second particle size; Wherein, the second particle size is larger than the first particle size.

2. The shield machine screening and slag removal system according to claim 1, characterized in that: The discharge pipeline (504) is provided with a gate (505), and the gates (505) on the two discharge pipelines (504) are opened alternately so that the two discharge pipelines (504) are alternately connected.

3. The shield machine screening and slag removal system according to claim 2, characterized in that: The number of the gates (505) on each of the discharge pipelines (504) is at least two.

4. The shield machine screening and slag removal system according to claim 1 or 2, characterized in that: In the direction from the slag conveying equipment (5) to the slag separation and quarrying box (6), the discharge pipeline (504) is arranged to be inclined downward.

5. The shield machine screening and slag removal system according to claim 1, characterized in that: The screening section (601) has a slurry discharge pipeline (6014), and the slurry discharge pipeline (6014) is connected to the lower chamber (6012) in an on-off manner.

6. The shield machine screening and slag removal system according to claim 1, characterized in that: From the direction away from the slag collection box (10) to the direction close to the slag collection box (10), the bottom surface of the stone storage area (602) is smooth and inclined downward, and the slag discharge port (6021) is located at the bottom of the slag collection box (10) and close to one side of the slag collection box (10) so that the slag of the second particle size can slide into the slag collection box (10).

7. The shield machine screening and slag removal system according to claim 1, characterized in that: The slag conveying equipment (5) comprises a first conveyor (501) and a second conveyor (502), wherein the inlet end of the first conveyor (501) is connected to the air cushion bin (4) or the soil bin of the shield machine, the outlet end of the first conveyor (501) is connected to the inlet end of the second conveyor (502), the outlet end of the second conveyor (502) extends to the top of the slag separation and quarrying box (6), and the two discharge pipelines (504) are symmetrically arranged at the lower part of the outlet end of the second conveyor (502); From the air cushion bin (4) or the soil bin to the second conveyor (502), the first conveyor (501) extends obliquely upward, and / or, from the first conveyor (501) to the slag quarrying box (6), the second conveyor (502) extends in a horizontal direction.

8. The shield machine screening and slag removal system according to claim 7, characterized in that: The shield machine screening and slag discharge system further comprises a first trailer (7), an equipment bridge (8) and a second trailer (9), wherein the first trailer (7) is connected to the shield body (2) of the shield machine, the second trailer (9) is connected to the first trailer (7) via the equipment bridge (8), and the slag separation and quarrying box (6) and the slag and rock collection box (10) are both located in the second trailer (9); At least part of the second conveyor (502) is located above the first trailer (7) and the equipment bridge (8), and a bracket (503) is erected between the top of the first trailer (7) and / or the top of the equipment bridge (8) and the second conveyor (502).

9. The shield machine screening and slag removal system according to claim 5, characterized in that: The shield machine screening and slag discharge system further comprises a material vehicle (11), and the material vehicle (11) can be connected to the slag discharge port of the slag collection box (10); And / or, the shield machine screening and slag discharge system also includes a pump truck (12), and the pump truck (12) can be connected to the slurry discharge pipeline (6014).

10. A shield machine screening and slag discharge method, which uses the shield machine screening and slag discharge system according to any one of claims 1 to 9 to screen and discharge slag, characterized in that: The shield machine screening slag discharge method comprises the following steps: Step S1: the slag cut off by the cutter head (1) in the air cushion chamber (4) or soil chamber of the shield machine is transported to two discharge pipelines (504) by the slag conveying equipment (5); wherein, of the two discharge pipelines (504), one of the discharge pipelines (504) is connected and the other of the discharge pipelines (504) is closed; Step S2: discharging the slag and rock to the screening area (601) of the slag and rock quarrying box (6) through the discharge pipeline (504); wherein the muddy water and the slag and rock of the first particle size pass through the screening partition plate (6013) and enter the lower chamber (6012) from the upper chamber (6011) of the screening area (601); the slag and rock of the second particle size in the upper chamber (6011) is transported to the stone storage area (602) of the slag and rock quarrying box (6) through the screening equipment; Step S3: After the rock storage area (602) of one of the slag separation and quarrying boxes (6) is fully loaded, the on-off states of the two discharge pipelines (504) are replaced, and the fully loaded rock storage area (602) discharges the slag into the slag collection box (10), and the slag transported by the slag conveying equipment (5) is discharged into the screening area (601) of another of the slag separation and quarrying boxes (6); Step S4: Repeat steps S2 to S3.

11. The shield machine screening slag removal method according to claim 10, characterized in that: In step S2 and step S3, the muddy water and the slag of the first particle size that enter the lower chamber (6012) are transported to the outside of the tunnel by a pump truck (12); and / or, the slag of the second particle size in the slag collection box (10) is transported to the outside of the tunnel by a material truck (11).

12. The shield machine screening slag removal method according to claim 10, characterized in that: In step S2 and step S3, muddy water and slag of the first particle size are first discharged through the slurry discharge pipeline (6014), and then slag of the second particle size is discharged to the slag collection box (10) through the slag discharge port (6021) of the rock storage area (602).

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