Soft and hard composite stratum shield cutter head

Abstract

The utility model discloses a soft and hard composite stratum shield cutter head, which belongs to the technical field of shield tunneling machines, and comprises a rounded corner outer ring, an external expansion structure is fixedly connected to the inner surface of the rounded corner outer ring, an excavation mechanism is fixedly connected to the outside of the external expansion structure, and the excavation mechanism is fixedly connected to the outside of the external expansion structure through the cooperation of the external expansion structure and the excavation mechanism. A plurality of double-edge hobs in the center of the cutterhead are omitted, and the center is changed into the hexagonal fishtail cutters, so that the center fishtail cutters can enable the center in front of the shield tunneling machine to be firstly excavated and cut, the stirring force of a center soil body is increased, and the shield tunneling machine is suitable for excavation of various soft rock stratums; and the multiple double-edge hobs are arranged on the periphery of the center point and matched with the hexagonal fishtail cutter in the center, hard rock strata can be excavated conveniently, the function suitable for the composite strata can be achieved, and the practicability of the cutterhead is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine technical field more specifically, relate to a kind of soft and hard composite stratum shield cutterhead. BACKGROUND

[0002] Shield machine is a kind of engineering machinery specially used for tunnel excavation, with multiple functions, including cutting soil body, transporting soil, assembling tunnel lining, measurement and guiding deviation correction etc. It is suitable for subway construction, tunnel construction, traffic engineering construction, water conservancy construction and other fields, can quickly and accurately excavate pipeline tunnel, and solve the traffic congestion, environmental pollution and other problems caused by traditional excavation construction method, in the process of shield machine operation, suitable cutterhead is selected according to the soil quality of different strata.

[0003] Chinese patent authorization announcement No. CN104060995A provides a kind of shield cutterhead structure for soft and hard uneven mutual invasion composite rock stratum, the scheme is by setting heavy cutterhead, double-blade center cutter, single-blade front cutter, single-blade peripheral cutter and auxiliary knife etc.;Auxiliary knife includes front tooth cutter, shovel and protective knife, under the joint action of several cutters, shield cutterhead can be shielded in soft and hard uneven, interactive invasion composite rock stratum, but there are still the following defects in the specific implementation process:the cutterhead cannot guarantee that the slag soil is smoothly entered into soil bin when excavating stratum is relatively soft, thereby inducing cutterhead mud cake, leading to lower construction efficiency.

[0004] Therefore, aiming at the above problems, a kind of soft and hard composite stratum shield cutterhead is provided. UTILITY MODEL CONTENT

[0005] 1. Technical problem to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a kind of soft and hard composite stratum shield cutterhead, which can realize the function suitable for composite stratum.

[0007] 2. Technical scheme

[0008] To solve the above problems, the utility model adopts the following technical scheme.

[0009] A kind of soft and hard composite stratum shield cutterhead, including fillet outer ring, the fillet outer ring inner surface is fixedly connected with outer expansion structure, the outer expansion structure outer fixedly connected with excavating mechanism.

[0010] Further, the outer expansion structure includes connecting inner ring, the connecting inner ring outer surface is fixedly connected with several Y-shaped plates, the outer surface of several Y-shaped plates is fixedly connected with the inner surface of the fillet outer ring, two cutter slots one are set in the upper end of several Y-shaped plates, and the profiled cutter is rotatably connected in the inner surface of several cutter slots one.

[0011] Further, the excavating mechanism comprises a hexagonal plate, four muck grooves are formed in the upper end of the hexagonal plate, a central cutter assembly is movably connected to the upper end of the hexagonal plate, and a plurality of cutter disc assemblies are fixedly connected to the outer surface of the hexagonal plate.

[0012] Further, the central cutter assembly comprises a connecting pipe, the lower end of the connecting pipe is movably connected to the upper end of the hexagonal plate, a plurality of cutter holders are fixedly connected to the upper end of the hexagonal plate, a toothed cutter is slidably connected to the outer surface of each of the cutter holders, a plurality of scrapers are slidably connected to the outer surface of each of the cutter holders, and a positioning plate is slidably connected to the outer surface of each of the cutter holders.

[0013] Further, the cutter disc assembly comprises a cutter beam, a cutter groove two is formed in the upper end of the cutter beam, a double-edge hob is rotatably connected to the inner cavity of the cutter groove two, four cutter grooves three are formed in the upper end of the cutter beam, a single-edge hob is rotatably connected to the inner cavity of each of the four cutter grooves three, and a plurality of scrapers are fixedly connected to the outer surface of the cutter beam.

[0014] Further, the outer surface of the outer side of each of the cutter beams is fixedly connected to the inner surface of a rounded outer ring, and the lower end of each of the cutter beams is fixedly connected to the upper end of a connecting inner ring.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The outer expansion structure cooperates with the excavating mechanism, so that the shield cutter disc can be applied to composite strata, the number of nozzles in the center of the cutter disc is increased by the central cutter assembly, the problem of poor muck improvement and flushing effect of the cutter disc in the central area is effectively solved, the formation of mud cake in the central area after long-time excavation is avoided, the plurality of double-edge hobs in the center of the cutter disc are removed, the central area is changed to use a hexagonal fish tail cutter, the central fish tail cutter can excavate the center in front of the shield machine first, the stirring degree of the central soil body is increased, the excavating of various soft rock strata is suitable, and the central area of the cutter disc is prevented from forming mud cake. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is an outer expansion structure schematic view of the utility model;

[0020] Figure 3 It is an excavating mechanism schematic view of the utility model;

[0021] Figure 4 It is a central cutter assembly schematic view of the utility model;

[0022] Figure 5 The utility model discloses a cutter head assembly schematic view.

[0023] Marking of figure:

[0024] 1, round outer ring;2, outer expansion structure;21, connecting inner ring;22, Y-shaped plate;23, cutter groove one;24, profiling cutter;3, excavating mechanism;31, hexagonal plate;32, slag groove;33, center cutter assembly;331, connecting pipe;332, cutter holder;333, tooth cutter;334, scraper;335, positioning plate;34, cutter head assembly;341, cutter beam;342, cutter groove two;343, double-edge hob;344, cutter groove three;345, single-edge hob;346, scraper plate. Specific implementation

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model;Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments;Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of the utility model.

[0026] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeving / connection", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Embodiment:

[0029] Please refer to Figures 1-5The utility model provides a kind of soft and hard composite stratum shield cutter head, including fillet outer ring 1, the inner surface of fillet outer ring 1 is fixedly connected with outer expansion structure 2, outer expansion structure 2 is fixedly connected with excavating mechanism 3 outside.

[0030] The utility model connects outer expansion structure 2 and excavating mechanism 3 together by fillet outer ring 1, determines the shape of cutter head while, so that outer expansion structure 2 and excavating mechanism 3 can be used mutually, in the process of excavating mechanism 3 excavation, can expand local excavation section by outer expansion structure 2, improve construction efficiency.

[0031] Please refer to Figures 2-5 Outer expansion structure 2 includes connecting inner ring 21, the outer surface of connecting inner ring 21 is fixedly connected with several Y-shaped plates 22, the outer surface of several Y-shaped plates 22 is fixedly connected with the inner surface of fillet outer ring 1, two cutter grooves one 23 are formed in the upper end of several Y-shaped plates 22, and the inner surface of several cutter grooves one 23 is rotatably connected with profiling cutter 24.

[0032] Excavating mechanism 3 includes hexagonal plate 31, four muck grooves 32 are formed in the upper end of hexagonal plate 31, and center cutter assembly 33 is movably connected to the upper end of hexagonal plate 31, and several cutter disc assemblies 34 are fixedly connected to the outer surface of hexagonal plate 31.

[0033] Center cutter assembly 33 includes connecting pipe 331, the lower end of connecting pipe 331 is movably connected with the upper end of hexagonal plate 31, several tool holders 332 are fixedly connected to the upper end of hexagonal plate 31, toothed cutter 333 is slidably connected to the outer surface of several tool holders 332, several scrapers 334 are slidably connected to the outer surface of several tool holders 332, and positioning plate 335 is slidably connected to the outer surface of several tool holders 332.

[0034] Cutter disc assembly 34 includes tool beam 341, the inner surface of the outer side of several tool beams 341 is fixedly connected with the inner surface of fillet outer ring 1, the upper end of several tool beams 341 is fixedly connected with the upper end of connecting inner ring 21, cutter groove two 342 is formed in the upper end of tool beam 341, double-edge hob 343 is rotatably connected in the inner cavity of cutter groove two 342, four cutter grooves three 344 are formed in the upper end of tool beam 341, single-edge hob 345 is rotatably connected in the inner cavity of four cutter grooves three 344, and several scrapers 346 are fixedly connected to the outer surface of tool beam 341.

[0035] The positions of the plurality of tooth cutters 333 and the plurality of scrapers 334 can be fixed by the cooperation of the plurality of tool holders 332 and the plurality of positioning plates 335, so that the plurality of tooth cutters 333 and the plurality of scrapers 334 jointly form a hexagonal center fish tail cutter, the center fish tail cutter can make the soil in the center of the front of the shield cutter head be excavated first, increase the stirring degree of the center soil body, make the excavation of various soft rock strata, and effectively prevent the mud cake in the center area of the cutter head, meanwhile, the action of the four spoil slots 32 makes the external transportation of the spoil become easy, the positions of the six double-blade rollers 343 and the plurality of single-blade rollers 345 are fixed by the tool beam 341, so that the shield cutter head can also excavate in hard rock, the positions of the plurality of profiling cutters 24 are fixed by the plurality of Y-shaped plates 22, in the process of the shield cutter head excavation, the local tunnel section can be enlarged, the diameter of the tunnel is ensured, and the diameter protection effect is achieved.

[0036] It should be noted that the specific installation method and control method of the profiling cutter 24, the tooth cutter 333, the scraper 334, the double-blade roller 343 and the single-blade roller 345 in the utility model are conventional design, and the utility model will not be described in detail.

[0037] Working principle: the structure of the cutter head is changed by moving the plurality of double-blade rollers 343 in the center of the cutter head to the inner ring of the center point, the center fish tail cutter is formed by cooperation of the plurality of tooth cutters 333 and the plurality of scrapers 334 with the tool holder 332 in the center point, the cutter head is convenient for excavating the front center, the stirring degree of the center soil body is increased, the excavation of various soft rock strata is made, and the mud cake in the center area of the cutter head is effectively prevented, the cooperation of the plurality of double-blade rollers 343 of the inner ring and the plurality of single-blade rollers 345 of the outer ring makes the cutter head can be used in hard stratum, meanwhile, the plurality of profiling cutters 24 of the outermost ring can enlarge the local tunnel section, the diameter protection effect is achieved, the three are cooperated, the shield cutter head can be suitable for soft and hard composite stratum, the cutter head does not need to be frequently replaced in the process of tunnel excavation, and the construction speed is improved.

[0038] The above describes only the preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A shield cutter for soft and hard composite ground formations comprising a rounded outer ring (1), characterized in that: The outer ring (1) is internally connected with an expanding structure (2), and the expanding structure (2) is externally connected with a digging mechanism (3); the expanding structure (2) comprises a connecting inner ring (21), and the connecting inner ring (21) is externally connected with a plurality of Y-shaped plates (22), the outer surfaces of the Y-shaped plates (22) are fixedly connected with the inner surface of the outer ring (1), the upper ends of the Y-shaped plates (22) are provided with two cutter grooves (23), and the inner surfaces of the cutter grooves (23) are rotatably connected with profiled cutters (24); the digging mechanism (3) comprises a hexagonal plate (31), the upper end of the hexagonal plate (31) is provided with four slag grooves (32), the upper end of the hexagonal plate (31) is movably connected with a center cutter assembly (33), and the outer surface of the hexagonal plate (31) is fixedly connected with a plurality of cutter disc assemblies (34).

2. The soft and hard composite ground shield cutter disc according to claim 1, characterized in that: The center cutter assembly (33) comprises a connecting pipe (331), the lower end of the connecting pipe (331) is movably connected with the upper end of the hexagonal plate (31), the upper end of the hexagonal plate (31) is fixedly connected with a plurality of cutter holders (332), the outer surfaces of the cutter holders (332) are slidably connected with tooth cutters (333), the outer surfaces of the cutter holders (332) are slidably connected with a plurality of scrapers (334), and the outer surfaces of the cutter holders (332) are slidably connected with positioning plates (335).

3. The soft and hard composite ground shield cutter disc according to claim 1, characterized in that: The cutter disc assembly (34) comprises a cutter beam (341), the upper end of the cutter beam (341) is provided with a cutter groove (342), the inner cavity of the cutter groove (342) is rotatably connected with a double-blade hob (343), the upper end of the cutter beam (341) is provided with four cutter grooves (344), the inner cavities of the cutter grooves (344) are rotatably connected with single-blade hobs (345), and the outer surface of the cutter beam (341) is fixedly connected with a plurality of scrapers (346).

4. The soft and hard composite ground shield cutter disc according to claim 3, characterized in that: The outer surfaces of the cutter beams (341) are fixedly connected with the inner surface of the outer ring (1), and the lower ends of the cutter beams (341) are fixedly connected with the upper end of the connecting inner ring (21).

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