A tunnel boring machine and a cutter head capable of cutting reinforced concrete segments

Abstract

The present invention discloses a tunnel boring machine and a cutterhead capable of cutting reinforced concrete segments. The cutterhead capable of cutting reinforced concrete segments comprises a cutterhead base, an outer cutting ring and a driving member. The cutterhead base is provided with a first cutting tool. The outer cutting ring is mounted on the outer periphery of the cutterhead base. The driving member is used to drive the outer cutting ring to be retracted and released relative to the cutterhead base. In the above-mentioned cutterhead capable of cutting reinforced concrete segments, the outer cutting ring can be extended alone to cut the reinforced concrete segments of the main tunnel at the starting end and the receiving end of the tunnel, which solves the problem of cutting steel bars in the full-section tunnel boring mechanical method construction; further reduces the cutting difficulty, improves the cutting tunneling speed, shortens the construction time, and the outer cutting ring cutting alone causes less disturbance to the main tunnel, which can reduce the impact on the main tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and in particular to a cutter head capable of cutting reinforced concrete segments in the construction of connecting passages, horizontal T-joints and vertical T-joints tunnels. The present invention also relates to a tunnel boring machine. Background Art

[0002] A communication channel is one or more emergency channels set up between two adjacent tunnels for fire evacuation, rescue, drainage, etc. At present, the traditional construction methods for communication channels at home and abroad mainly include grouting reinforcement method and freezing method. The traditional construction methods have a long construction period, great safety hazards, poor construction quality and high cost. With the development of science and technology, mechanized construction methods such as shield method and jacking method have also entered the experimental stage.

[0003] During construction using mechanized methods such as shield and pipe jacking, on the one hand, when the cutterhead advances to the main tunnel segment at the receiving end, the cutterhead cannot directly break the reinforced concrete segment because the main tunnel segment at the receiving end is in reverse arc contact with the cutterhead. Therefore, the existing mechanical construction method requires special segments at the starting and receiving ends; on the other hand, the shield / pipe jacking machine uses the cutterhead to perform full-section cutting of the main tunnel segments and soil. The overall cutting difficulty of the cutterhead is relatively large, and the cutting time of the segments at the starting and receiving ends of the main tunnel is long; in addition, the overall excavation process greatly disturbs the tunnel soil, which can easily lead to surface settlement in the excavation area, which has a great impact on the main tunnel.

[0004] Therefore, how to provide a cutter head that can cut reinforced concrete segments and solve the above-mentioned technical problems is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a cutter head capable of cutting reinforced concrete segments, wherein the outer cutting ring can be extended alone to cut the reinforced concrete segments of the tunnel starting end and the receiving end of the main tunnel, which can reduce the cutting difficulty, increase the cutting and excavation speed, shorten the construction time, and the outer cutting ring cutting alone will cause less disturbance to the main tunnel, which can reduce the impact on the main tunnel. Another purpose of the present invention is to provide a tunnel boring machine.

[0006] To achieve the above-mentioned purpose, the present invention provides a cutter disc capable of cutting reinforced concrete pipe segments, comprising a cutter disc base, an outer cutting ring and a driving member, wherein the cutter disc base is provided with a first cutting tool, the outer cutting ring is mounted on the outer periphery of the cutter disc base, and the driving member is used to drive the outer cutting ring to be retracted and released relative to the cutter disc base.

[0007] Preferably, the outer cutting ring is slidably connected to the cutter disc base, and the driving member has a first action end connected to the cutter disc base and a second action end connected to the outer cutting ring.

[0008] Preferably, the outer cutting ring has an outer sleeve and a second tool arranged on the outer sleeve, and the cutter disc base has an inner sleeve; the outer sleeve is provided with a key strip and the inner sleeve is provided with a key slot matching the key strip, or the outer sleeve is provided with a key slot and the inner sleeve is provided with a key strip matching the key slot.

[0009] Preferably, a limiter for limiting the retraction and extension stroke of the outer cutting ring is provided between the outer sleeve and the inner sleeve.

[0010] Preferably, the limiting member includes a first limiting boss arranged at the front end of the inner sleeve and a second limiting boss arranged at the rear end of the outer sleeve; a plurality of movable seals cooperating with the outer cutting ring are also arranged at the first limiting boss, and grease injection ports are arranged between the movable seals.

[0011] Preferably, there are multiple groups of driving members, and the multiple groups of driving members are arranged in the circumferential direction of the cutter disc base.

[0012] Preferably, the driving member is a cylinder assembly; the cylinder assembly comprises a first cylinder and a second cylinder which are arranged back to back, the actuating end of the first cylinder is connected to the cutter disc base, and the actuating end of the second cylinder is connected to the outer cutting ring.

[0013] Preferably, the cutter disc base is provided with a cavity structure for installing the drive component, and the cutter disc base also has a large flange and a cone plate. The large flange is used to connect the main drive, and the large flange is welded and fixed to the inner sleeve. The cone plate is annular and inclined from the inside to the outside, and the cone plate is welded and fixed to the large flange and the inner sleeve respectively.

[0014] Preferably, the second tool includes a first concrete cutter, a second concrete cutter and a third concrete cutter distributed in an annular direction, the cutting edge of the first concrete cutter faces inward, the cutting edge of the second concrete cutter is centered, and the cutting edge of the third concrete cutter faces outward; the blades of the first concrete cutter, the second concrete cutter and the third concrete cutter are designed to be in the form of a "narrow ridge" wedge-shaped blade with a small flat top and a large acute angle, and the combined trajectory of the cutting edges of the first concrete cutter, the second concrete cutter and the third concrete cutter is arranged in a V-shaped wedge-shaped blade.

[0015] The present invention also provides a tunneling machine, comprising the above-mentioned cutter head capable of cutting reinforced concrete segments.

[0016] Compared with the above-mentioned background technology, the cutter disc capable of cutting reinforced concrete pipe segments provided by the present invention comprises a cutter disc base, an outer cutting ring and a driving member. The cutter disc base is provided with a first cutting tool, the outer cutting ring is installed on the outer periphery of the cutter disc base, and the driving member is used to drive the outer cutting ring to be retracted and released relative to the cutter disc base.

[0017] The working process of the cutter disc capable of cutting reinforced concrete segments can be divided into two situations: first, when excavating between the starting and receiving end segments, the outer cutting ring is retracted to perform full-section excavation operations; second, when breaking the segments, the outer cutting ring is released to perform breaking operations. The outer cutting ring of the cutter disc capable of cutting reinforced concrete segments can be extended alone to cut the reinforced concrete segments of the main tunnel at the starting and receiving ends of the tunnel, which can reduce the cutting difficulty, increase the cutting excavation speed, shorten the construction time, and the outer cutting ring cutting alone will cause less disturbance to the main tunnel, which can reduce the impact on the main tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 A front view of a cutter head capable of cutting reinforced concrete segments provided in an embodiment of the present invention;

[0020] Figure 2 A side cross-sectional view of a cutterhead capable of cutting reinforced concrete segments provided in an embodiment of the present invention;

[0021] Figure 3 for Figure 2 The local enlarged schematic diagram of point I in the middle;

[0022] Figure 4 for Figure 2 A partial enlarged schematic diagram of position II in the middle;

[0023] Figure 5 A schematic diagram of the combined trajectory arrangement of a concrete cutting knife provided in an embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a cutterhead capable of cutting reinforced concrete segments provided in an embodiment of the present invention cutting a main tunnel segment at a starting end;

[0025] Figure 7 A schematic diagram of a cutter head capable of cutting reinforced concrete segments provided in an embodiment of the present invention cutting a main tunnel segment at a receiving end.

[0026] in:

[0027] 2-cutter disc base, 21-center cylinder, 22-large flange, 23-inner sleeve, 24-cone plate, 25-movable seal, 26-cavity structure, 3-cylinder assembly, 31-first cylinder, 32-cylinder fixing plate, 33-second cylinder, 4-outer cutting ring, 41-outer sleeve, 42-second tool, 421-first concrete cutting tool, 422-second concrete cutting tool, 423-third concrete cutting tool, 5-transmission cylinder, 6-swivel joint, 7-first tool. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Please refer to Figures 1 to 7 ,in, Figure 1 A front view of a cutter head capable of cutting reinforced concrete segments provided by an embodiment of the present invention, Figure 2 A side cross-sectional view of a cutter head capable of cutting reinforced concrete segments provided by an embodiment of the present invention, Figure 3 for Figure 2 The enlarged schematic diagram of the part I in the middle, Figure 4 for Figure 2 The enlarged schematic diagram of the part II in the middle. Figure 5 A schematic diagram of the combined trajectory arrangement of a concrete cutter provided in an embodiment of the present invention, Figure 6 A schematic diagram of a cutter head capable of cutting reinforced concrete segments provided in an embodiment of the present invention cutting a main tunnel segment at a starting end, Figure 7 A schematic diagram of a cutter head capable of cutting reinforced concrete segments provided in an embodiment of the present invention cutting a main tunnel segment at a receiving end.

[0031] In the first specific embodiment, the cutter disc capable of cutting reinforced concrete segments provided by the present invention includes a cutter disc base 2, an outer cutting ring 4 and a driving member, the cutter disc base 2 is provided with a first cutting tool 7, the outer cutting ring 4 is installed on the outer periphery of the cutter disc base 2, and the driving member is used to drive the outer cutting ring 4 to be retracted and released relative to the cutter disc base 2.

[0032] It should be noted that the above-mentioned cutter disc is a component system, including several parts and devices. Only the main functional components of the cutter disc are provided in this embodiment. Among them, compared with the traditional cutter disc, the present embodiment adds an outer cutting ring 4. The outer periphery of the cutter disc is equipped with an outer cutting ring 4 that can be movably adjusted. When retracted, its end face is flush with the excavation face of the cutter disc, and when released, its end face exceeds the excavation face of the cutter disc, so that the released outer cutting ring 4 rotates with the cutter disc base 2, so that the outer cutting ring 4 can independently cut the reinforced concrete segments of the main tunnel at the starting end and the receiving end of the tunnel, thereby solving the existing construction problems mentioned in the background technology, reducing the cutting difficulty, improving the cutting excavation speed, shortening the construction time, and the outer cutting ring 4 independently cutting has less disturbance to the main tunnel, which can reduce the impact on the main tunnel.

[0033] Specifically, the working process of the cutterhead capable of cutting reinforced concrete segments can be divided into two situations; first, when excavating between the segments at the starting end and the receiving end, the outer cutting ring 4 is retracted to carry out full-section excavation operations, and the excavation surface at this time is jointly constituted by the cutterhead base 2 and the retracted outer cutting ring 4; second, when breaking the segments, the outer cutting ring 4 is released, and the released outer cutting ring 4 rotates with the cutterhead base 2, and the main tunnel segments at the starting end and the receiving end of the tunnel are cut separately to carry out breaking operations, and the outer cutting ring 4 can cut steel bars.

[0034] It should be noted that there are various structures and movement forms of the above-mentioned outer cutting ring 4. Taking the telescopic form as an example, the outer cutting ring 4 is telescopically assembled on the outer periphery of the cutter disc base 2. Under the action of the driving member, the outer cutting ring 4 has an extended single working state and a retracted common working state.

[0035] More specifically, the outer cutting ring 4 can achieve telescopic changes along the axial direction by sliding.

[0036] In this embodiment, the outer cutting ring 4 is slidingly connected to the cutter disc base 2, and the driving member has a first action end and a second action end, the first action end is connected to the cutter disc base 2, and the second action end is connected to the outer cutting ring 4. At this time, the cutter disc base 2 provides mechanical movement limitation for the outer cutting ring 4, and the outer cutting ring 4 is supported by the cutter disc base 2. The driving member only provides thrust to ensure that the movement process of the outer cutting ring 4 is more stable and reliable.

[0037] Exemplarily, the driving member adopts a multi-unit back-to-back combination, so as to have a first action end and a second action end with opposite movement directions. When the driving member is in motion, the action ends at both ends are extended and retracted at the same time, which can effectively reduce the initial installation distance and ensure that the outer cutting ring 4 is uniformly stressed as a whole.

[0038] The excavation surface of the cutter disc base 2 is the front, and the back surface of the cutter disc base 2 is the rear; after the outer cutting ring 4 slides forward relative to the cutter disc base 2, it is equivalent to an extension action; after the outer cutting ring 4 slides backward relative to the cutter disc base 2, it is equivalent to a retraction action.

[0039] In this embodiment, the outer cutting ring 4 has an outer sleeve 41 , and the outer sleeve 41 is provided with a second cutter 42 , while the cutter head base 2 has an inner sleeve 23 , and the outer sleeve 41 is assembled on the outer periphery of the inner sleeve 23 .

[0040] It should be noted that there are many sliding forms, including but not limited to slide rails, slide grooves, etc., which should all fall within the scope of description of this embodiment.

[0041] Exemplarily, taking the matching key strip and key slot as an example, the following two situations are included, which should belong to the description scope of this embodiment: first, the outer sleeve 41 is provided with a key strip and the inner sleeve 23 is provided with a key slot matching with the key strip; second, the outer sleeve 41 is provided with a key slot and the inner sleeve 23 is provided with a key strip matching with the key slot.

[0042] It should be noted that, for the sake of ease of explanation, the following description will be given in the form of a key strip being provided on the outer sleeve 41 and a key groove being provided on the inner sleeve 23; the key grooves of the inner sleeve 23 can be set to different numbers and lengths according to actual needs, which should also fall within the scope of the description of this embodiment; preferably, the inner sleeve 23 has multiple key grooves, and the multiple key grooves are evenly distributed.

[0043] Furthermore, a limiter for limiting the retraction and extension stroke of the outer cutting ring 4 is provided between the outer sleeve 41 and the inner sleeve 23 .

[0044] In this embodiment, the limit member can play a role of mechanical limit during the extension and retraction process of the outer cutting ring 4; on this basis, the number of driving members is multiple groups, and the multiple groups of driving members are arranged in the circumferential direction of the cutter disc base 2. The multiple groups of driving members are connected and drive the extension and retraction of the outer cutting ring 4 at the same time, so that the working process of the multiple groups of driving members can meet the synchronization requirements.

[0045] There are many structural forms of the driving member, including but not limited to electric, pneumatic and hydraulic, which should all fall within the scope of the description of this embodiment.

[0046] Exemplarily, the driving member is a cylinder assembly 3, and the cylinder assembly 3 is composed of a plurality of telescopic cylinders.

[0047] In the embodiment where the limiting member is a limiting boss: the limiting member includes a first limiting boss arranged at the front end of the inner sleeve 23 and a second limiting boss arranged at the rear end of the outer sleeve 41; a movable seal 25 cooperating with the outer cutting ring 4 is also arranged at the first limiting boss, and a grease injection port is arranged between the movable seals 25.

[0048] In this embodiment, in addition to the second limiting boss at the rear of the outer sleeve 41 being provided to cooperate with the inner sleeve 23, the first limiting boss is provided at the front end of the outer circumference of the inner sleeve 23 to cooperate with the outer cutting ring 4. On this basis, a movable seal 25 is provided at the first limiting boss to cooperate with the outer cutting ring 4, and a grease injection port is provided between the movable seals 25.

[0049] The limiting boss and the movable seal 25 provided on the cutter disc base 2 can guide and mechanically limit the synchronization of the telescopic cylinder while ensuring the sealing performance inside the cutter disc base 2; the functions of the movable seal 25 include guiding and dust prevention, etc.; the movable seal 25 can be provided with multiple channels, and the specific styles include but are not limited to lip seals, O-rings, etc.

[0050] It should be noted that the above-mentioned setting method of the limit boss is only a preferred method, that is, the mechanical limit boss for synchronization in this example is not limited to the two-point design of the front end of the inner sleeve 23 and the rear end of the outer sleeve 41. A multi-point design can be selected according to the overall length of the cutter disc, which should also fall within the scope of the description of this embodiment. In the embodiment where the driving member is the cylinder assembly 3: the cylinder assembly 3 includes a first cylinder 31 and a second cylinder 33 arranged in back-to-back, the action end of the first cylinder 31 is connected to the cutter disc base 2, and the action end of the second cylinder 33 is connected to the outer cutting ring 4.

[0051] In this embodiment, the number of the first cylinder 31 and the second cylinder 33 is not limited; it should be noted that the difference between the two cylinders lies in the different installation directions. The first cylinder 31 installed forward can be telescoped forward, while the second cylinder 33 installed backward can be telescoped backward.

[0052] More specifically, the oil cylinder assembly 3 further includes an oil cylinder fixing plate 32 , and the oil cylinder is installed and fixed in the oil cylinder fixing plate 32 .

[0053] The number of the cylinder assemblies 3 is multiple groups; illustratively, taking the number of the cylinder assemblies 3 being equal to three groups as an example, the three groups of cylinder assemblies 3 are evenly distributed, and the key grooves can also be set to three evenly distributed locations.

[0054] Exemplarily, for any group of cylinder assemblies 3, the number of the first cylinder 31 and the second cylinder 33 are both two, and the above-mentioned multi-unit back-to-back combination method is adopted; at this time, any group of cylinder assemblies 3 includes four single cylinders (the first cylinder 31 and the second cylinder 33) and two cylinder fixing plates 32, and the cylinder fixing plates 32 are evenly distributed and welded to the outer cylinder body of each single cylinder; the oil rods of the two single cylinders on both sides face forward, and the oil rods of the two single cylinders in the middle face backward; the front ends of the single cylinders on both sides are connected to the cutter disc base 2 through the cylinder fixing seat, and the rear end of the single cylinder in the middle is connected to the outer cutting ring 4 through the cylinder fixing seat.

[0055] It should be noted that the number of the above-mentioned single oil cylinders being four is only a preferred embodiment, and other numbers should also fall within the scope of the description of this embodiment.

[0056] In this embodiment, when all the oil rods of the cylinder assembly 3 are extended, the second tool 42 of the outer cutting ring 4 is flush with the height of the first tool 7 provided on the cutter disc base 2; when all the oil rods of the cylinder assembly 3 are retracted, the outer cutting ring 4 is extended alone, and at the same time, the cutter disc base 2 drives the outer cutting ring 4 to rotate, thereby realizing the outer cutting ring 4 to cut and advance alone.

[0057] Furthermore, the cutter disc base 2 is provided with a cavity structure 26 for installing a driving component, and the cavity structure 26 includes but is not limited to a panel type; the cutter disc base 2 also has a large flange 22 and a cone plate 24, the large flange 22 is used to connect the main drive, the large flange 22 is welded and fixed to the inner sleeve 23, the cone plate 24 is annular and is inclined from the inside to the outside, and the cone plate 24 is welded and fixed to the large flange 22 and the inner sleeve 23 respectively.

[0058] In addition, the above-mentioned cutter disc at least includes a transmission cylinder 5 and a rotary joint 6, and the cutter disc base 2 at least includes a central cylinder 21, a large flange 22, an inner sleeve 23, a cone plate 24, a movable seal 25 and a cavity structure 26.

[0059] In this embodiment, the transmission cylinder 5 and the swivel joint 6 are coaxially installed with the rotation center of the cutter head, and the swivel joint 6 is driven by the transmission cylinder 5. The pipe layout and wiring related to the cylinder assembly 3 and the foam pipeline set on the cutter head are connected to the external pipeline etc. through the pipe joint on the outer fixed shell of the swivel joint 6.

[0060] Among them, the large flange 22 is directly welded to the inner sleeve 23. Compared with the traditional flange support leg design, it can greatly reduce the overall length of the cutter disc, increase the internal installation space of the main machine, and improve the structural strength of the whole machine; it should be noted that the arrangement of a circle of cone plates 24 can effectively prevent the accumulation of debris at the bottom of the cutter disc, which is conducive to the smooth discharge of debris through the screw conveyor.

[0061] Furthermore, the second tool 42 includes a first concrete cutting tool 421, a second concrete cutting tool 422 and a third concrete cutting tool 423 distributed in an annular direction, and the concrete cutting tools can be further arranged to be evenly distributed; wherein, the cutting edge of the first concrete cutting tool 421 faces inward, the cutting edge of the second concrete cutting tool 422 is centered, and the cutting edge of the third concrete cutting tool 423 faces outward.

[0062] In this embodiment, the first concrete cutting knife 421 is an inner concrete cutting knife, the second concrete cutting knife 422 is a middle concrete cutting knife, and the third concrete cutting knife 423 is an outer concrete cutting knife; the inner, outer and middle concrete cutting knives are installed at the front end of the outer sleeve 41 and are evenly distributed; the blade of each concrete cutting knife is designed as a "narrow ridge" wedge-shaped blade with a small flat top and a large acute angle, and the combined trajectory of the cutting edges of multiple tools is arranged in a V-shaped wedge-shaped blade, and the maximum dimension on both sides between the valley peaks of the blade angle of each concrete cutting knife is not greater than the diameter of a single steel bar, and the tool is installed in the form of a screw connection, which is convenient for tool maintenance and replacement.

[0063] It should be noted that the second tool 42 is provided with the first concrete cutting knife 421, the second concrete cutting knife 422 and the third concrete cutting knife 423 is only a preferred manner, and the types of concrete cutting knives include but are not limited to toothed knives, cutting knives, etc., and the number of concrete cutting knives can be set in various ways.

[0064] It should be noted that the blades of the concrete cutters, i.e. the first concrete cutter 421, the second concrete cutter 422 and the third concrete cutter 423, are designed as "narrow ridge" wedge-shaped blades with small flat tops and large acute angles. During the operation of the cutters, the blades penetrate the steel bars to form V-shaped grooves, which can effectively cut and grind the steel bars. The combined cutting trajectories of the various cutter blades are arranged in a V-shaped wedge-shaped blade arrangement, and the maximum dimensions on both sides between the valley peaks of the blade angles of each concrete cutter are not greater than the diameter of a single steel bar. On the one hand, it can ensure that the contact area between the concrete cutter and the steel bar is small, which is beneficial to the speed of the cutter cutting the steel bar. On the other hand, it can ensure that the length of a single steel bar cut is short, which can avoid the cut steel bar from being unable to be removed.

[0065] Among them, the cutting edge of the inner concrete cutter faces inward to minimize the excavation gap with the front cutter on the cutter disc base 2, the cutting edge of the middle concrete cutter is centered, and the cutting edge of the outer concrete cutter faces outward to ensure the excavation diameter of the cutter disc. Each cutter is set with a suitable cutting edge angle to ensure its cutting performance. When the cutter disc excavates between the starting end and the receiving end pipe segment, the outer cutting ring 4 retracts, and the first cutter 7 on the cutter disc base 2 and the second cutter 42 set on the outer cutting ring 4 cut and excavate together. When the cutter disc excavates near the receiving end pipe segment, the outer cutting ring 4 extends to cut the pipe segment alone until the cut pipe segment is delivered to the receiving equipment.

[0066] In addition, the second cutter 7 on the cutter disc base can be arranged by selecting a variety of cutters, including but not limited to a toothed cutter, a cutting knife, a fishtail center cutter, a rolling cutter, etc.

[0067] The present invention also provides a tunnel boring machine, including the above-mentioned cutterhead that can cut reinforced concrete segments, which can not only realize the excavation of connecting channels, horizontal T-shaped butt joints and vertical T-shaped butt joint tunnels, but also avoid damaging the main structure of the tunnel and ensure the safety of the tunnel boring process. Moreover, the main tunnel does not need special segments at the starting and receiving ends, and the cutterhead can directly break the reinforced concrete segments.

[0068] The tunnel boring machine should have all the beneficial effects of the above-mentioned cutterhead capable of cutting reinforced concrete segments:

[0069] (1) Compared with existing full-section excavation mechanical construction equipment such as the jacking method and the shield method, by installing an outer cutting ring 4 on the outer periphery of the cutterhead base 2, the outer cutting ring 4 can be extended alone to cut the reinforced concrete segments of the main tunnel at the starting end and the receiving end of the tunnel. On the one hand, it can reduce the cutting difficulty, greatly improve the cutting and excavation speed, shorten the construction time, and the outer cutting ring 4 cutting alone will cause less disturbance to the main tunnel, which can greatly reduce the impact on the main tunnel.

[0070] (2) The peripheral support structure is adopted, and the large flange 22 is directly welded to the inner sleeve 23. On the one hand, it can maximize the internal installation space of the main machine and greatly improve the structural strength of the whole machine. On the other hand, the design without cutter head legs effectively reduces the overall length of the cutter head and even the whole machine, saving space for the limited main tunnel layout.

[0071] (3) By respectively arranging limit bosses at the front end of the inner sleeve 23 and the rear end of the outer sleeve 41, a mechanical limit function can be achieved during the extension and retraction process of the outer cutting ring 4, so that the working process of the three groups of cylinder assemblies 3 can meet the synchronization requirements. In addition, by arranging a movable seal at the front end of the inner sleeve 23, a grease injection port is arranged between the movable seals and grease is injected, so that the sealing effect is ensured and the jamming of the outer cutting ring 4 during the extension and retraction process can be effectively avoided.

[0072] (4) Multiple groups of oil cylinder assemblies 3 are provided, each group of oil cylinders is welded or assembled by multiple single oil cylinders through multiple oil cylinder fixing plates 32, wherein the oil rods of the multiple single oil cylinders on both sides face forward, and the oil rods of the multiple single oil cylinders in the middle face backward; this can effectively reduce the initial installation distance of each group of oil cylinders, thereby reducing the overall length of the cutter head, saving space for the layout of the whole machine in the main tunnel. At the same time, the overall force of the outer cutting ring 4 is uniform.

[0073] (5) A circle of cone plates 24 is provided in the soil bin to effectively prevent the accumulation of soil at the bottom of the cutter disc, which is conducive to the smooth discharge of soil through the screw conveyor.

[0074] (6) By arranging a plurality of concrete cutters on the outer cutting ring 4, the blade of each concrete cutter is designed as a "narrow ridge" wedge-shaped blade with a small flat top and a large acute angle. During the operation of the cutter, the blade penetrates the steel bar to form a V-shaped groove, which can effectively cut and grind the steel bar. The combined trajectory of the cutting blades of the plurality of cutters is arranged in a V-shaped wedge-shaped blade, and the maximum dimension on both sides between the valley peaks of the blade angle of each concrete cutter is not greater than the diameter of a single steel bar. On the one hand, it can ensure that the contact area between the concrete cutter and the steel bar is small, which is beneficial to the speed of the cutter cutting the steel bar. On the other hand, it can ensure that the length of a single steel bar cut is short, which can avoid the cut steel bar from being unable to be removed.

[0075] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0076] The above is a detailed introduction to the tunnel boring machine and the cutter head for cutting reinforced concrete segments provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A cutter head capable of cutting reinforced concrete segments, characterized in that: The invention comprises a cutter disc base (2), an outer cutting ring (4) and a driving member, wherein the cutter disc base (2) is provided with a first cutter (7), the outer cutting ring (4) is mounted on the outer periphery of the cutter disc base (2), and the driving member is used to drive the outer cutting ring (4) to be retracted and released relative to the cutter disc base (2); The outer cutting ring (4) has a second tool (42), the second tool (42) comprising a first concrete cutting tool (421), a second concrete cutting tool (422) and a third concrete cutting tool (423) which are distributed in an annular direction, the cutting edge of the first concrete cutting tool (421) faces inwards, the cutting edge of the second concrete cutting tool (422) is centered, and the cutting edge of the third concrete cutting tool (423) faces outwards; the cutting edges of the first concrete cutting tool (421), the second concrete cutting tool (422) and the third concrete cutting tool (423) are designed as a "narrow ridge" wedge-shaped blade with a small flat top and a large acute angle, and the combined cutting edge trajectory of the first concrete cutting tool (421), the second concrete cutting tool (422) and the third concrete cutting tool (423) is arranged in a V-shaped wedge-shaped blade.

2. The cutter head capable of cutting reinforced concrete segments according to claim 1, characterized in that: The outer cutting ring (4) is slidably connected to the cutter disc base (2), and the driving member has a first action end connected to the cutter disc base (2) and a second action end connected to the outer cutting ring (4).

3. The cutter head capable of cutting reinforced concrete segments according to claim 2, characterized in that: The outer cutting ring (4) has an outer sleeve (41) and the second tool (42) arranged on the outer sleeve (41), and the cutter disc base (2) has an inner sleeve (23); the outer sleeve (41) is provided with a key strip and the inner sleeve (23) is provided with a key groove matching the key strip, or the outer sleeve (41) is provided with a key groove and the inner sleeve (23) is provided with a key strip matching the key groove.

4. The cutter head capable of cutting reinforced concrete segments according to claim 3, characterized in that: A limiting member for limiting the retraction and extension stroke of the outer cutting ring (4) is provided between the outer sleeve (41) and the inner sleeve (23).

5. The cutter head capable of cutting reinforced concrete segments according to claim 4, characterized in that: The limiting member comprises a first limiting boss arranged at the front end of the inner sleeve (23) and a second limiting boss arranged at the rear end of the outer sleeve (41); a plurality of movable seals (25) cooperating with the outer cutting ring (4) are also arranged at the first limiting boss, and grease injection ports are arranged between the movable seals (25).

6. The cutter head capable of cutting reinforced concrete segments according to any one of claims 1 to 5, characterized in that: The number of the driving members is multiple groups, and the multiple groups of driving members are arranged in the circumferential direction of the cutter disc base (2).

7. The cutter head capable of cutting reinforced concrete segments according to claim 6, characterized in that: The driving member is a cylinder assembly (3); the cylinder assembly (3) comprises a first cylinder (31) and a second cylinder (33) which are arranged in back-to-back relation; the actuating end of the first cylinder (31) is connected to the cutter disc base (2), and the actuating end of the second cylinder (33) is connected to the outer cutting ring (4).

8. The cutter head capable of cutting reinforced concrete segments according to any one of claims 3 to 5, characterized in that: The cutter disc base (2) is provided with a cavity structure (26) for installing the drive component. The cutter disc base (2) also has a large flange (22) and a cone plate (24). The large flange (22) is used to connect the main drive. The large flange (22) is welded and fixed to the inner sleeve (23). The cone plate (24) is annular and inclined from the inside to the outside. The cone plate (24) is welded and fixed to the large flange (22) and the inner sleeve (23) respectively.

9. A tunnel boring machine, characterized in that: A cutter disc capable of cutting reinforced concrete segments as described in any one of claims 1 to 8.

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