Open-type TBM spraying and mixing system and open-type TBM

Abstract

The utility model relates to the technical field of tunnel boring, in particular to an open-type TBM (tunnel boring machine) spray-mixing system and an open-type TBM.The open-type TBM spray-mixing system comprises a spray-mixing mechanical arm assembly, a concrete pumping device and a concrete transportation system, the spray-mixing mechanical arm assembly is arranged on a steel arch support ring, and the concrete pumping device is movably arranged at the tail end of a connecting bridge; the output end of the concrete pumping device is connected with the spraying and mixing mechanical arm assembly, and the input end of the concrete pumping device is in butt joint with the concrete conveying system. According to the utility model, the spraying and mixing manipulator assembly is arranged on the steel arch support ring, is close to the tail part of the shield, can support and spray concrete in time when surrounding rock is exposed out of the shield, is compact in structure and relatively small in occupied installation space, and improves the space utilization rate; the input end of the concrete pumping device is in direct butt joint with the concrete transportation system, concrete is directly fed at a time without being unloaded, the concrete reshipment link is reduced, the problem of discontinuous spraying and mixing is solved, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring, in particular to an open TBM shotcrete mixing system and an open TBM. Background Art

[0002] With the wide application of full-face tunnel boring machines (TBMs) in mountain tunnels and subway projects, compared with the previous manual drilling and blasting method, the construction efficiency has been greatly improved, and good application effects have also been achieved. However, when the TBM encounters complex strata, such as large deformation of soft rock, fault fracture zones, etc., the requirements for rapid shotcrete mixing technology in the L1 area are very high. At present, the conventional emergency shotcrete mixing device is far from the shield, and it is impossible to support the broken surrounding rock exposed from the shield in the first time. Moreover, the existing emergency shotcrete mixing device needs to additionally increase a slewing device, resulting in an uncompact structure, a large occupied installation space, and low space utilization rate. In addition, the shotcrete spraying device has the problem of discontinuous shotcrete mixing, which affects the construction production progress.

[0003] Based on the above, there is an urgent need to provide an open TBM shotcrete mixing system and an open TBM to solve the problems existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an open TBM shotcrete mixing system and an open TBM, and the specific technical solutions are as follows:

[0005] An open TBM shotcrete mixing system includes a shotcrete mixing manipulator assembly, a concrete pumping device, and a concrete transportation system. The shotcrete mixing manipulator assembly is arranged on the steel arch support ring. The concrete pumping device is movably arranged at the end of the connecting bridge. The output end of the concrete pumping device is connected to the shotcrete mixing manipulator assembly, and the input end of the concrete pumping device is docked with the concrete transportation system.

[0006] Further, the shotcrete mixing manipulator assembly includes two sets of shotcrete mixing manipulator units, which are respectively arranged on both sides of the steel arch support ring;

[0007] The shotcrete mixing manipulator unit includes a rotating frame, a spray head, and a driving device;

[0008] The rotating frame is arranged on the steel arch support ring. The rotating frame is an arc-shaped structure, and an arc-shaped walking track is arranged on the rotating frame;

[0009] The spray head is arranged on the arc-shaped walking track, and the driving device is used to drive the spray head to move along the arc-shaped walking track.

[0010] Further, the central angle corresponding to the movement track of the spray head along the arc-shaped walking track is 0° - 130°.

[0011] Further, the driving device is connected to the nozzle; the driving device includes a motor reducer and a pinion, and the output end of the motor reducer is connected to the pinion;

[0012] A gear ring is arranged on the arc-shaped walking track, and the pinion is meshed and connected with the gear ring.

[0013] Further, the concrete pumping device is arranged at the end of the connecting bridge through a movable platform;

[0014] The concrete pumping device includes a concrete pump and a conveying pipeline. The movable platform is arranged on the connecting bridge, the concrete pump is arranged on the movable platform, and the output end of the concrete pump is connected to the input end of the nozzle through the conveying pipeline.

[0015] Further, the movable platform includes a platform frame, a support plate and a driving system. The platform frame is arranged on the connecting bridge; the support plate is arranged on the platform frame and is used for supporting the concrete pump; the driving system is arranged on the platform frame, and the driving system is connected to the support plate and is used for driving the support plate to extend and retract along the direction perpendicular to the tunnel extension direction.

[0016] Further, the driving system includes a reduction motor, a gear is connected to the output end of the reduction motor, a rack is arranged at the bottom of the support plate, and the gear is meshed and connected with the rack.

[0017] Further, the concrete transportation system includes a concrete tank and a transportation trolley. The transportation trolley is used for transporting the concrete tank, and the concrete tank is butted against the input end of the concrete pump.

[0018] An open TBM includes a steel arch support ring, a main beam and the shotcrete system as described above. The steel arch support ring is arranged on the main beam, and the shotcrete system is used for spraying concrete on the support area in front of the steel arch support ring.

[0019] Further, the steel arch support ring includes two arc-shaped segments, and the two arc-shaped segments are symmetrically arranged along the main beam.

[0020] Applying the technical solution of the present utility model has the following beneficial effects:

[0021] (1) The utility model provides an open TBM shotcrete system, which includes a shotcrete manipulator assembly, a concrete pumping device, and a concrete transportation system. The shotcrete manipulator assembly is arranged on the steel arch support ring. The concrete pumping device is movably arranged at the end of the connecting bridge. The output end of the concrete pumping device is connected to the shotcrete manipulator assembly, and the input end of the concrete pumping device is docked with the concrete transportation system. In the utility model, the shotcrete manipulator assembly is arranged on the steel arch support ring, close to the tail of the shield. When the surrounding rock is exposed from the shield, it can timely support and spray concrete. Moreover, the shotcrete manipulator assembly is arranged on the steel arch support ring, with a compact structure and relatively less occupied installation space, improving the space utilization rate. The input end of the concrete pumping device is docked with the concrete transportation system, realizing direct one-time feeding of concrete without unloading, reducing the concrete transfer link, solving the problem of discontinuous shotcrete, and improving the construction efficiency.

[0022] (2) In the utility model, the steel arch support ring includes two arc segments, which are symmetrically arranged along the main beam. Two sets of single-piece shotcrete manipulators are respectively arranged on the two arc segments of the steel arch support ring, realizing a 260° concrete spraying range and ensuring the smoothness of the central channel of the main beam at the same time.

[0023] (3) In the utility model, by setting a movable platform, the concrete delivery pump can extend and retract along the direction perpendicular to the tunnel extension. When shotcrete operation is required, the concrete delivery pump extends towards the tunnel center, and the concrete delivery pump is directly docked with the concrete tank, reducing the concrete transfer link, solving the problem of discontinuous shotcrete, and improving the construction efficiency. When shotcrete operation is not required, the concrete delivery pump retracts, ensuring the smoothness of the central channel of the tunnel and avoiding occupying the operation space of other equipment.

[0024] In addition to the purposes, features, and advantages described above, the utility model has other purposes, features, and advantages. The following will refer to the drawings to further elaborate on the utility model in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0026] Figure 1 is the overall structural schematic diagram of the shotcrete system in the embodiment of the utility model;

[0027] Figure 2 is the schematic diagram of the shotcrete manipulator assembly installed on the steel arch support ring;

[0028] Figure 3 is the structural schematic diagram of the shotcrete manipulator assembly;

[0029] Figure 4 is a schematic diagram of the cooperation between a concrete pumping device and a concrete transportation system;

[0030] Figure 5 is Figure 4 a partial structural schematic diagram of;

[0031] Figure 6 is a schematic diagram of the concrete transportation system;

[0032] Among them, 1. Shotcrete manipulator assembly, 1.1. Rotating frame, 1.2. Nozzle, 1.3. Driving device, 2. Concrete pumping device, 2.1. Concrete delivery pump, 2.2. Delivery pipeline, 3. Concrete transportation system, 3.1. Concrete tank, 3.2. Transport trolley, 4. Steel arch support ring, 5. Connecting bridge, 6. Movable platform, 6.1. Platform frame, 6.2. Support plate, 6.3. Driving system, 7. Main beam. Detailed implementation manners

[0033] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0036] Embodiment

[0037] Refer to Figures 1 to 6, this embodiment provides an open TBM shotcrete system, including a shotcrete manipulator assembly 1, a concrete pumping device 2 and a concrete transportation system 3. The shotcrete manipulator assembly 1 is arranged on the steel arch support ring 4. The concrete pumping device 2 is movably arranged at the end of the connecting bridge 5. The output end of the concrete pumping device 2 is connected to the shotcrete manipulator assembly 1, and the input end of the concrete pumping device 2 is docked with the concrete transportation system 3.

[0038] In this embodiment, the shotcrete manipulator assembly 1 is arranged on the steel arch support ring 4, about 500 mm away from the shield tail. The distance is short, so that when the surrounding rock is exposed from the shield, it can be timely supported and shotcrete can be sprayed. The shotcrete manipulator assembly 1 is arranged on the steel arch support ring 4, with a compact structure and relatively small occupied installation space, improving the space utilization rate.

[0039] In this embodiment, refer to Figure 2 and Figure 3 , the shotcrete manipulator assembly 1 includes two sets of shotcrete manipulator units, and the two sets of shotcrete manipulator units are respectively arranged on both sides of the steel arch support ring 4; the shotcrete manipulator unit includes a rotating frame 1.1, a nozzle 1.2 and a driving device 1.3; the rotating frame 1.1 is arranged on the steel arch support ring 4, the rotating frame 1.1 is an arc-shaped structure, and an arc-shaped walking track is arranged on the rotating frame 1.1; the nozzle 1.2 is arranged on the arc-shaped walking track, and the driving device 1.3 is used to drive the nozzle 1.2 to move along the arc-shaped walking track.

[0040] In this embodiment, preferably, the nozzle 1.2 is arranged on the arc-shaped walking track through a walking trolley, the nozzle 1.2 is swingably arranged on the walking trolley, and the driving device 1.3 is connected to the walking trolley; the driving device 1.3 includes a motor reducer and a small gear, and the output end of the motor reducer is connected to the small gear; a toothed ring is arranged on the arc-shaped walking track, and the small gear is meshed with the toothed ring; the motor reducer drives the small gear to rotate, the small gear is meshed with the toothed ring, driving the walking trolley to move, and thus realizing the movement of the nozzle 1.2 along the arc-shaped walking track. The driving device can be arranged in the internal space of the steel arch support ring 4, reducing the space occupation and the influence on other support devices.

[0041] In this embodiment, preferably, guide wheels are arranged on the walking trolley to guide the movement of the walking trolley.

[0042] In this embodiment, preferably, a swing oil cylinder is further arranged on the walking trolley, and the swing oil cylinder is connected to the nozzle 1.2 to drive the nozzle 1.2 to swing.

[0043] Preferably, the central angle corresponding to the movement trajectory of the spray head 1.2 along the arc-shaped walking track is 0°-130°. In this embodiment, the two spray heads 1.2 work together to achieve shotcrete operation within a range of 260°.

[0044] See Figure 1 and Figures 4 - 6 , the concrete pumping device 2 is arranged at the end of the connecting bridge 5 through a movable platform 6; the concrete pumping device 2 includes a concrete pump 2.1 and a conveying pipeline 2.2. The movable platform 6 is arranged on the connecting bridge 5, the concrete pump 2.1 is arranged on the movable platform 6, and the output end of the concrete pump 2.1 is connected to the input end of the spray head 1.2 through the conveying pipeline 2.2.

[0045] See Figure 5 , the movable platform 6 includes a platform frame 6.1, a support plate 6.2 and a drive system 6.3. The platform frame 6.1 is arranged on the connecting bridge 5; the support plate 6.2 is arranged on the platform frame 6.1 for supporting the concrete pump 2.1; the drive system 6.3 is arranged on the platform frame 6.1, and the drive system 6.3 is connected to the support plate 6.2 for driving the support plate 6.2 to extend and retract in a direction perpendicular to the tunnel extension direction.

[0046] The drive system 6.3 includes a reduction motor. The output end of the reduction motor is connected with a gear. A rack is arranged at the bottom of the support plate 6.2. The gear is meshed with the rack. The reduction motor drives the gear to rotate, and the gear meshes with the rack to drive the support plate 6.2 to extend and retract, thereby driving the concrete pump 2.1 to move.

[0047] See Figure 6 , the concrete transportation system 3 includes a concrete tank 3.1 and a transportation trolley 3.2. The transportation trolley 3.2 is used for transporting the concrete tank 3.1, and the concrete tank 3.1 is docked with the input end of the concrete pump 2.1.

[0048] In this embodiment, when shotcrete operation is required, the transportation trolley 3.2 transports the concrete tank 3.1 to the tail of the connecting bridge. The movable platform 6 drives the concrete pump 2.1 to move, so that the input end of the concrete pump 2.1 is directly docked with the concrete tank 3.1, realizing direct one-time feeding of concrete without unloading, reducing the transfer link of concrete, solving the problem of discontinuous shotcrete, and improving the construction efficiency; when shotcrete operation is not required, the concrete pump 2.1 retracts to ensure the smoothness of the middle passage of the tunnel and avoid occupying the operation space of other equipment.

[0049] This embodiment provides an open TBM, which includes a steel arch support ring 4, a main beam 7, and the shotcrete system as described above. The steel arch support ring 4 is arranged on the main beam 7, and the shotcrete system is used to spray concrete on the support area in front of the steel arch support ring 4 (the tail of the shield). Preferably, the steel arch support ring 4 includes two arc segments, and the two arc segments are symmetrically arranged along the main beam 7. Two groups of shotcrete manipulators are respectively arranged on the two arc segments to ensure the smoothness of the central passage of the main beam.

[0050] In this embodiment, a traveling device is arranged on the steel arch support ring 4, and the traveling device drives the steel arch support ring 4 to move axially along the main beam 7. Preferably, the traveling device includes a plurality of traveling wheels, and under the driving action of the oil cylinder, the traveling wheels drive the steel arch support ring 4 to move along the track on the main beam.

[0051] The open TBM provided by this embodiment can realize the timely support of the surrounding rock exposed from the shield through the shotcrete system, and at the same time solve the problem of discontinuous shotcrete, improving the construction efficiency.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An open TBM shotcrete system, characterized in that, It includes a shotcrete robot arm assembly (1), a concrete pumping device (2) and a concrete transportation system (3). The shotcrete robot arm assembly (1) is arranged on the steel arch support ring (4). The concrete pumping device (2) is movably arranged at the end of the connecting bridge (5). The output end of the concrete pumping device (2) is connected to the shotcrete robot arm assembly (1), and the input end of the concrete pumping device (2) is docked with the concrete transportation system (3).

2. The open TBM shotcrete system according to claim 1, characterized in that, The shotcrete robot arm assembly (1) includes two sets of shotcrete robot arm units, which are respectively arranged on both sides of the steel arch support ring (4); The shotcrete robot arm unit includes a rotating frame (1.1), a spray head (1.2) and a driving device (1.3); The rotating frame (1.1) is arranged on the steel arch support ring (4). The rotating frame (1.1) is of an arc structure, and an arc-shaped walking track is arranged on the rotating frame (1.1); The spray head (1.2) is arranged on the arc-shaped walking track, and the driving device (1.3) is used to drive the spray head (1.2) to move along the arc-shaped walking track.

3. An open TBM shotcrete mixing system according to claim 2, characterized in that, The central angle corresponding to the movement track of the spray head (1.2) along the arc-shaped walking track is 0° - 130°.

4. An open TBM shotcrete mixing system according to claim 2, characterized in that, The driving device (1.3) is connected to the spray head (1.2); the driving device (1.3) includes a motor reducer and a small gear, and the output end of the motor reducer is connected to the small gear; A toothed ring is arranged on the arc-shaped walking track, and the small gear is meshed and connected with the toothed ring.

5. An open TBM shotcrete system according to claim 2, characterized in that, The concrete pumping device (2) is arranged at the end of the connecting bridge (5) through a movable platform (6); The concrete pumping device (2) includes a concrete delivery pump (2.1) and a delivery pipeline (2.2). The movable platform (6) is arranged on the connecting bridge (5). The concrete delivery pump (2.1) is arranged on the movable platform (6), and the output end of the concrete delivery pump (2.1) is connected to the input end of the spray head (1.2) through the delivery pipeline (2.2).

6. The open TBM shotcrete mixing system according to claim 5, characterized in that, The movable platform (6) includes a platform frame (6.1), a support plate (6.2) and a driving system (6.3). The platform frame (6.1) is arranged on the connecting bridge (5); the support plate (6.2) is arranged on the platform frame (6.1) for supporting the concrete delivery pump (2.1); the driving system (6.3) is arranged on the platform frame (6.1), and the driving system (6.3) is connected to the support plate (6.2) for driving the support plate (6.2) to extend and retract in a direction perpendicular to the tunnel extension direction.

7. An open TBM shotcrete system according to claim 6, characterized in that, The driving system (6.3) includes a reduction motor, the output end of the reduction motor is connected with a gear, and a rack is arranged at the bottom of the support plate (6.2), and the gear is meshed and connected with the rack.

8. An open TBM shotcrete mixing system according to any one of claims 5-7, characterized in that The concrete transportation system (3) includes a concrete tank (3.1) and a transportation trolley (3.2). The transportation trolley (3.2) is used to transport the concrete tank (3.1), and the concrete tank (3.1) is docked with the input end of the concrete delivery pump (2.1).

9. An open TBM, characterized in that, It includes a steel arch support ring (4), a main beam (7), and the shotcrete system according to any one of claims 1-8. The steel arch support ring (4) is arranged on the main beam (7), and the shotcrete system is used to spray concrete on the support area in front of the steel arch support ring (4).

10. An open TBM according to claim 9, characterized in that, The steel arch support ring (4) includes two arc segments, and the two arc segments are symmetrically arranged along the main beam (7).

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