Double-shield double-mode heading machine

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly provides a double-shield and double-mode heading machine which comprises a front shield, a tight supporting shield, a main drive and a deslagging system. The driving end of the main drive is provided with a cutter head, and the fixed end of the main drive is sleeved with a front shield; the tight supporting shield is installed at the end, away from the main drive, of the front shield. The slag discharging system comprises a spiral conveyor, a main machine belt conveyor and a slag receiving mechanism; one end of the spiral conveyor is connected with the front shield; the slag receiving mechanism comprises a slag receiving main body, a slag receiving hopper and a sliding structure for driving the slag receiving hopper to move relative to the slag receiving main body; and the main machine belt conveyor is connected with the slag receiving hopper. According to the double-shield double-mode heading machine provided by the utility model, the screw conveyor and the main machine belt conveyor are integrated, so that the disassembly and transportation workload of main components of the earth pressure mode deslagging system and the double-shield mode deslagging system in the mode conversion process is reduced, and the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel construction technology and relates to a dual-shield dual-mode tunneling machine, specifically to an efficient mode conversion scheme for the main unit muck discharge system of a tunneling machine that is adapted to excavation construction in complex strata of soft rock and extremely hard rock. Background Technology

[0002] With the expansion of tunnel boring machine (TBM) applications, the geological conditions faced in construction projects are becoming increasingly complex. Single-mode TBMs cannot effectively handle tunneling in complex formations, and their construction efficiency is affected and limited. Therefore, the application of multi-mode TBMs is becoming more widespread. Different types of TBMs have different muck removal methods and muck systems. When integrating multiple types of TBMs, the conversion of muck removal modes and the corresponding conversion efficiency are crucial issues in the construction process. Currently, there is no technology for online mode conversion of the muck removal system for earth pressure / dual-shield dual-mode TBMs. This solution solves the technical challenge of efficient mode conversion within the tunnel for earth pressure / dual-shield dual-mode TBMs.

[0003] Existing technologies mostly involve the muck removal system conversion design technology for dual-mode tunnel boring machines (TBMs) with earth pressure / single shield configurations. Examples include an earth pressure TBM dual-mode shield machine capable of in-tunnel formwork switching (CN111156012A) and an online dual-mode shield machine and dual-mode conversion method (CN113446016A). These technical solutions are only applicable to TBMs where the main shield body lacks a large-scale telescopic structure. However, earth pressure / dual-shield dual-mode TBMs have two propulsion systems. During dual-shield mode tunneling, there is a large relative displacement between the front shield and the supporting shield. If a conventional online muck removal system design is used, the auger will move significantly with the front shield relative to the supporting shield, causing interference and collision between the auger and the shield structure. Some patents or documents involve mode conversion in dual-shield muck removal systems, but these are only conceptual solutions without specific solutions or plans, such as a composite dual-shield tunnel boring machine (CN104196538A). Utility Model Content

[0004] This utility model provides a dual-shield dual-mode tunneling machine, including a front shield, a tensioning shield, a main drive, and a muck removal system;

[0005] A cutter head is installed on the drive end of the main drive, and a front shield is sleeved on the fixed end of the main drive.

[0006] The tensioning shield is installed on the end of the front shield furthest from the main drive;

[0007] The slag discharge system includes a screw conveyor, a main belt conveyor, and a slag receiving mechanism; one end of the screw conveyor is connected to the front shield; the slag receiving mechanism includes a slag receiving body, a slag receiving hopper, and a sliding structure for driving the slag receiving hopper to move relative to the slag receiving body; the main belt conveyor is connected to the slag receiving hopper.

[0008] Furthermore, a front shield flange cylinder is provided at the part of the front shield used to connect with the screw conveyor;

[0009] The screw conveyor is equipped with a slag discharge outlet, a control gate for controlling the opening or closing of the slag discharge outlet, and a first flange for connecting to the front shield flange cylinder.

[0010] Furthermore, this also includes the support beams for the segment assembly machine;

[0011] The screw conveyor is connected to the support beam of the segment assembly machine via an overlapping assembly.

[0012] Furthermore, the overlapping assembly includes an overlapping slider disposed on the screw conveyor and an overlapping slide rail disposed on the support beam of the segment assembly machine, wherein the overlapping slider and the overlapping slide rail cooperate with each other to form a sliding structure.

[0013] Furthermore, the main conveyor belt includes a conveyor body and a traveling structure disposed on the lower end face of the conveyor body. The traveling structure includes a traveling wheel set disposed on the lower end face of the conveyor body and a traveling guide rail that matches the traveling wheel set. The traveling guide rail is connected to the support shield in the tunneling machine.

[0014] Furthermore, the sliding structure includes a hydraulic cylinder, a second guide rail, and a guide rail slider;

[0015] One end of the hydraulic cylinder is connected to the main body of the slag receiving structure, and the other end of the hydraulic cylinder is connected to the second guide rail.

[0016] The guide rail slider is installed on the main body of the slag receiving structure;

[0017] The slag receiving hopper is installed on the second guide rail.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The dual-shield dual-mode tunneling machine provided by this utility model integrates the screw conveyor and the main belt conveyor into one unit to reduce the workload of disassembling and transporting the main components of the earth pressure mode slag discharge system and the dual-shield mode slag discharge system during the mode conversion process, thereby reducing costs.

[0020] (2) In this utility model, the main belt conveyor and the slag receiving hopper are designed as an integrated unit, which improves the structural strength and positioning accuracy.

[0021] (3) In the dual-shield mode of this utility model, by adopting a detachable design between the screw conveyor and the front shield, the wear and interference of components can be reduced.

[0022] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic cross-sectional view of a dual-shield dual-mode tunneling machine according to an embodiment of this utility model;

[0025] Figure 2 This is a second perspective cross-sectional view of a dual-shield dual-mode tunneling machine according to an embodiment of this utility model;

[0026] Figure 3 This is a partial schematic diagram showing the interconnection of the main conveyor belt, the telescopic slag receiving mechanism, and the main drive in an embodiment of this utility model.

[0027] in:

[0028] 1. Screw conveyor; 1-1. Control gate; 1-2. First flange; 2. Main belt conveyor; 2-1. Traveling assembly; 2-2. Traveling guide rail; 3. Telescopic slag receiving mechanism; 3-1. Second flange; 3-2. Slag receiving hopper; 3-3. Hydraulic cylinder; 3-4. Second guide rail; 3-5. Guide rail slider; 4. Main drive; 5. Front shield flange cylinder; 6. Protective cover plate; 7. Segment assembly machine support beam. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this utility model clearer and easier to understand, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of this utility model are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of this utility model; the "several" mentioned in this utility model are not limited to the specific number shown in the examples in the drawings; the directions or positional relationships indicated by "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "middle" mentioned in this utility model are all based on the directions or positional relationships shown in the accompanying drawings of this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on this utility model.

[0030] Example:

[0031] See Figures 1 to 3 As shown, the present invention provides a dual-shield dual-mode tunneling machine, including a front shield, a tensioning shield, a main drive 4, and a muck removal system, etc.

[0032] A cutter head is installed on the drive end of the main drive 4, and a front shield is sleeved on the fixed end of the main drive.

[0033] The tensioning shield is installed on the end of the front shield that is furthest from the main drive 4;

[0034] The slag discharge system includes a screw conveyor 1, a main belt conveyor 2, and a slag receiving mechanism 3; one end of the screw conveyor 1 is connected to the front shield; the slag receiving mechanism 3 includes a slag receiving body, a slag receiving hopper 3-2, and a sliding structure for driving the slag receiving hopper 3-2 to move relative to the slag receiving body; the main belt conveyor 2 is connected to the slag receiving hopper 3-2.

[0035] Preferably, a front shield flange cylinder 5 is provided at the part of the front shield used to connect with the screw conveyor;

[0036] The screw conveyor 1 is equipped with a slag discharge outlet, a control gate 1-1 for controlling the opening or closing of the slag discharge outlet, and a first flange 1-2 for connecting to the front shield flange cylinder 5.

[0037] More preferably, the control gate 1-1 is configured to include two gates that cooperate with each other, forming a double gate structure.

[0038] Preferably, it also includes a segment assembly machine support beam 7; the screw conveyor 1 is inclined and is connected to the segment assembly machine support beam 7 through an overlapping component, so that the screw conveyor 1 is supported by the segment assembly machine support beam 7.

[0039] More preferably, the overlapping component includes an overlapping slider disposed on the screw conveyor 1 and an overlapping slide rail disposed on the segment assembly machine support beam 7. The overlapping slider and the overlapping slide rail cooperate to form a sliding structure, and through the sliding overlapping method, a relative buffering effect is achieved between the screw conveyor 1 and the segment assembly machine support beam 7 during the turning or movement process.

[0040] Preferably, the main conveyor belt 2 includes a conveyor body and a traveling structure disposed on the lower end surface of the conveyor body. The traveling structure includes a traveling wheel set 2-1 disposed on the lower end surface of the conveyor body and a traveling guide rail 2-2 that matches the traveling wheel set 2-1. The traveling guide rail 2-2 is connected to the support shield in the tunneling machine.

[0041] More preferably, the walking wheel set 2-1 is provided with multiple sets that are spaced apart from each other along the tunneling direction of the tunneling machine.

[0042] Preferably, the sliding structure includes a hydraulic cylinder 3-3, a second guide rail 3-4, and a guide rail slider 3-5;

[0043] One end of the hydraulic cylinder 3-3 is connected to the main body of the slag receiving structure, and the other end of the hydraulic cylinder 3-3 is connected to the second guide rail 3-4.

[0044] The guide rail slider 3-5 is installed on the main body of the slag receiving structure;

[0045] The slag receiving hopper 3-2 is installed on the second guide rail 3-4.

[0046] As a further embodiment of this utility model, in addition to the above structure, the dual-shield dual-mode tunneling machine also includes a protective cover plate 6. After the screw conveyor 1 and the front shield flange cylinder 5 are disassembled, the protective cover plate 6 is connected to the front shield flange cylinder 5 to protect the front shield flange cylinder 5.

[0047] As a further embodiment of this utility model, when the above-mentioned dual-shield dual-mode tunneling machine uses a screw conveyor 1 for slag removal, the specific method is as follows:

[0048] The screw conveyor 1 is connected to the front shield flange cylinder 5 through the first flange 1-2, and the slag and soil generated by the tunneling machine during the tunneling process are discharged through the screw conveyor 1.

[0049] At the same time, hydraulic cylinder 3-3 is in the retracted state (i.e., slag hopper 3-2 is located near the main conveyor belt 2).

[0050] That is, the screw conveyor 1 is in working condition, and the slag receiving mechanism 3 is in non-working condition.

[0051] As a further embodiment of this utility model, when the above-mentioned dual-shield dual-mode tunneling machine uses the main conveyor belt 2 for muck removal, the specific method is as follows:

[0052] Hydraulic cylinder 3-3 extends to push the second guide rail 3-4 to move along the tunneling direction of the tunneling machine and position the slag receiving hopper 3-2 on the second guide rail 3-4 below the slag receiving position in the tunneling machine's soil chamber. The slag produced by the tunneling machine during the tunneling process falls into the slag receiving hopper 3-2 through the slag chute in the tunneling machine's soil chamber, and is then transferred to the main machine's belt conveyor 2 via the slag receiving hopper 3-2, thereby realizing slag discharge.

[0053] At the same time, the double gates 1-2 of the screw conveyor 1 are disassembled and stored, the slag outlet of the screw conveyor 1 is protected, the screw conveyor 1 and the front shield flange cylinder 5 are disconnected from each other, and the protective cover plate 6 is used to connect the screw conveyor 1 and the front shield flange cylinder 5.

[0054] It should be noted that, apart from the above description, the other structures and connections of the dual-shield dual-mode tunneling machine involved in this utility model are all based on existing technologies.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-shield, dual-mode tunneling machine, characterized in that, It includes a front shield, a tensioning shield, a main drive (4), and a slag removal system; A cutter head is installed on the drive end of the main drive (4), and a front shield is sleeved on the fixed end of the main drive; The tensioning shield is installed on the end of the front shield away from the main drive (4); The slag discharge system includes a screw conveyor (1), a main belt conveyor (2), and a slag receiving mechanism (3); one end of the screw conveyor (1) is connected to the front shield; the slag receiving mechanism (3) includes a slag receiving body, a slag receiving hopper (3-2), and a sliding structure that drives the slag receiving hopper (3-2) to move relative to the slag receiving body; the main belt conveyor (2) is connected to the slag receiving hopper (3-2).

2. The dual-shield dual-mode tunneling machine according to claim 1, characterized in that, A front shield flange cylinder (5) is provided at the part of the front shield used to connect with the screw conveyor; The screw conveyor (1) is provided with a slag discharge outlet, a control gate (1-1) for controlling the opening or closing of the slag discharge outlet, and a first flange (1-2) for connecting to the front shield flange cylinder (5).

3. The dual-shield, dual-mode tunneling machine according to claim 1 or 2, characterized in that, It also includes the segment assembly machine support beam (7); The screw conveyor (1) is connected to the support beam (7) of the segment assembly machine via an overlapping assembly.

4. The dual-shield dual-mode tunneling machine according to claim 3, characterized in that, The overlapping assembly includes an overlapping slider on the screw conveyor (1) and an overlapping slide rail on the support beam (7) of the segment assembly machine. The overlapping slider and the overlapping slide rail cooperate with each other to form a sliding structure.

5. The dual-shield dual-mode tunneling machine according to claim 1 or 4, characterized in that, The main conveyor belt (2) includes a conveyor body and a traveling structure disposed on the lower end face of the conveyor body. The traveling structure includes a traveling wheel set (2-1) disposed on the lower end face of the conveyor body and a traveling guide rail (2-2) matching the traveling wheel set (2-1). The traveling guide rail (2-2) is connected to the support shield in the tunneling machine.

6. The dual-shield dual-mode tunneling machine according to claim 1, characterized in that, The sliding structure includes a hydraulic cylinder (3-3), a second guide rail (3-4), and a guide rail slider (3-5). One end of the hydraulic cylinder (3-3) is connected to the main body of the slag receiving structure, and the other end of the hydraulic cylinder (3-3) is connected to the second guide rail (3-4); The guide rail slider (3-5) is installed on the main body of the slag receiving structure; The slag receiving hopper (3-2) is installed on the second guide rail (3-4).

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