CN220869404U - Cutterhead and tunnel boring machine - Google Patents

Abstract

The utility model provides a cutterhead and a tunnel boring machine. The cutterhead provided by the utility model is applied to a tunnel boring machine, and comprises a first cutterhead, a second cutterhead and a first connecting piece, wherein the second cutterhead is annular and coaxially sleeved outside the first cutterhead; a plurality of first connecting structures are arranged on the outer side of the circumference of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead are fixed relatively in the circumferential direction; the first connecting structure and the second connecting structure are detachably connected through the first connecting piece, so that the second cutter disc and the first cutter disc are relatively fixed in the axial direction of the cutter discs, or the second cutter disc is detached from the first cutter disc. The utility model provides a cutterhead and a tunnel boring machine, which can conveniently change the diameter of the cutterhead of the tunnel boring machine.

Description

Cutterhead and tunnel boring machine

Technical Field

The utility model relates to the field of tunnel boring machines, in particular to a cutter head and a tunnel boring machine.

Background

Tunnel boring machines are common mechanical construction equipment for tunnel construction, and in different stages of the boring of the tunnel boring machine, the requirements on the diameter of the tunnel may also be different, specifically, for example, it is required to bore a section of tunnel with a diameter changed from large to small, and in the prior art, it is common for the tunnel boring machine with different dimensions to bore tunnel sections with different diameters.

Tunnel boring machines generally tunnel forward through a cutter head that rotates forward, and therefore the size of the tunnel diameter is largely dependent on the size of the diameter of the cutter head of the tunnel boring machine.

Therefore, how to provide a tunneling machine cutterhead with convenient diameter changing is a technical problem to be solved in the field.

Disclosure of utility model

In order to solve at least one of the problems mentioned in the background art, the utility model provides a cutterhead and a tunnel boring machine, which can conveniently change the diameter of the cutterhead of the tunnel boring machine.

In order to achieve the above object, the present utility model provides the following technical solutions:

In a first aspect, the present utility model provides a cutterhead, which is applied to a tunneling machine, and the cutterhead includes a first cutterhead, a second cutterhead and a first connecting piece, wherein the second cutterhead is annular and coaxially sleeved outside the first cutterhead; a plurality of first connecting structures are arranged on the outer side of the circumference of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead are fixed relatively in the circumferential direction; the first connecting structure and the second connecting structure are detachably connected through the first connecting piece, so that the second cutter disc and the first cutter disc are relatively fixed in the axial direction of the cutter discs, or the second cutter disc is detached from the first cutter disc.

As an alternative embodiment, the first connection structure includes a stopper, and the width of the stopper gradually becomes smaller in the direction along the heading direction of the tunnel boring machine; the second connection structure comprises limit grooves matched with the limit blocks, and each limit block is correspondingly clamped in each limit groove.

As an optional implementation mode, the bottom of the limiting groove is provided with a first connecting hole, the outer side of the limiting block is provided with a second connecting hole matched with the first connecting hole, when the limiting block is clamped in the limiting groove, the first connecting hole is communicated with the second connecting hole along the axial direction of the first cutterhead, and the first connecting piece is simultaneously arranged in the first connecting hole and the second connecting hole in a penetrating mode so as to limit relative movement between the first cutterhead and the second cutterhead along the axial direction of the first cutterhead.

As an optional implementation mode, the limiting block is a boss protruding away from the center direction of the first cutter disc, and the projection shape of the limiting block along the radial direction of the first cutter disc is trapezoidal.

As an alternative implementation mode, a through groove is formed between every two adjacent limiting grooves on the second cutter disc, the through groove penetrates through two opposite sides of the second cutter disc along the axial direction of the second cutter disc, and the radian corresponding to the through groove in the circumferential direction of the second cutter disc is larger than that corresponding to the limiting groove in the circumferential direction of the second cutter disc.

In a second aspect, the present utility model also provides a tunneling machine, including a cutterhead according to any one of the first aspects.

As an optional implementation manner, the novel shield also comprises a shield, wherein the shield comprises a first shield body, a second shield body and a second connecting piece, the second shield body is coaxially sleeved outside the first shield body, and the first shield body and the second shield body are arranged in a sealing manner; the second shield body and the first shield body are detachably connected through a second connecting piece.

As an alternative embodiment, the first shield body comprises a joist extending along the tunneling direction of the tunnel boring machine and a plurality of supporting arms connected between the joist and the inner wall of the first shield body, and the plurality of supporting arms are distributed at intervals along the circumferential direction of the first shield body; the inner wall of the second shield body is provided with a plurality of supporting seats corresponding to the supporting arms, and each supporting seat is connected with the corresponding supporting arm.

As an alternative embodiment, the second connecting piece includes a plurality of thrust seats, and the one end of thrust seat is connected in the side of supporting seat, and the other end of thrust seat is connected in one side of support arm, and the thrust seat is located the one side of the tunnelling direction that deviates from of shield.

As an optional implementation mode, enclose between the first blade disc of the first shield body and blade disc and establish into first bin, enclose between the second blade disc of the first shield body, the second shield body and blade disc and establish into the second bin, tunnel boring machine still includes first slag tap pipeline and second slag tap pipeline, and first slag tap pipeline communicates with first bin bottom, and second slag tap pipeline communicates with second bin bottom.

The cutterhead provided by the utility model is applied to a tunnel boring machine, and comprises a first cutterhead, a second cutterhead and a first connecting piece, wherein the second cutterhead is annular and coaxially sleeved outside the first cutterhead; a plurality of first connecting structures are arranged on the outer side of the circumference of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead are fixed relatively in the circumferential direction; the first connecting structure and the second connecting structure are detachably connected through the first connecting piece, so that the second cutter disc and the first cutter disc are relatively fixed in the axial direction of the cutter discs, or the second cutter disc is detached from the first cutter disc. According to the cutter head provided by the utility model, the second cutter head is sleeved outside the first cutter head, so that the first connecting structure at the periphery of the first cutter head is clamped with the second connecting structure at the inner side of the second cutter head, meanwhile, the first connecting structure is connected with the second connecting structure through the first connecting piece, when the diameter is changed, only the first connecting piece is required to be removed, and then the second cutter head is required to be axially removed from the outside Zhou Yichu of the first cutter head, so that the diameter changing process is very convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic structural diagram of a tunneling machine according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a cutterhead according to an embodiment of the present utility model;

Fig. 3 is a schematic diagram of a second structure of a cutterhead according to an embodiment of the present utility model;

Fig. 4 is an exploded view of a cutterhead according to an embodiment of the present utility model;

Fig. 5 is a schematic structural diagram of a shield in a tunnel boring machine according to an embodiment of the present utility model;

Fig. 6 is a schematic structural diagram of a first shield in a tunnel boring machine according to an embodiment of the present utility model;

FIG. 7 is a first state diagram of a tunnel boring machine according to an embodiment of the present utility model when the tunnel boring machine is reducing;

FIG. 8 is a second state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model;

FIG. 9 is a third state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model;

FIG. 10 is a fourth state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model;

FIG. 11 is a fifth state diagram of a tunnel boring machine according to an embodiment of the present utility model when the tunnel boring machine is reducing;

fig. 12 is a sixth state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model.

Reference numerals illustrate:

100-tunneling machine;

110-cutterhead;

111-a first cutterhead;

1111-limited block;

112-a second cutterhead;

1121-a limit groove;

1122-pass through slots;

113-a first connector;

120-shield;

121-a first shield body;

1211-joists;

1212-a support arm;

122-a second shield;

1221-a support base;

123-thrust base;

130-a first plenum;

140-a second chamber;

150-a first slag tapping pipeline;

160-a second tapping line;

170-segment erector;

180-duct pieces;

190-steel ring;

200-dragging units;

210-an originating rack;

220-thrust cylinder.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

Tunnel boring machines are common mechanical construction equipment for tunnel construction, and the requirements on the diameter of a tunnel can be different in different stages of the boring of the tunnel boring machine. Tunnel boring machines generally tunnel forward through a cutter head that rotates forward, and therefore the size of the tunnel diameter is largely dependent on the size of the diameter of the cutter head of the tunnel boring machine. Therefore, how to provide a tunneling machine cutterhead with convenient diameter changing is a technical problem to be solved in the field.

In view of the above, the present utility model provides a cutterhead, which is applied to a tunnel boring machine, and the cutterhead comprises a first cutterhead, a second cutterhead and a first connecting piece, wherein the second cutterhead is annular and coaxially sleeved outside the first cutterhead; a plurality of first connecting structures are arranged on the outer side of the circumference of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead are fixed relatively in the circumferential direction; the first connecting structure and the second connecting structure are detachably connected through the first connecting piece, so that the second cutter disc and the first cutter disc are relatively fixed in the axial direction of the cutter discs, or the second cutter disc is detached from the first cutter disc. According to the cutter head provided by the utility model, the second cutter head is sleeved outside the first cutter head, so that the first connecting structure at the periphery of the first cutter head is clamped with the second connecting structure at the inner side of the second cutter head, meanwhile, the first connecting structure is connected with the second connecting structure through the first connecting piece, when the diameter is changed, only the first connecting piece is required to be removed, and then the second cutter head is required to be axially removed from the outside Zhou Yichu of the first cutter head, so that the diameter changing process is very convenient.

FIG. 1 is a schematic structural diagram of a tunneling machine according to an embodiment of the present utility model; fig. 2 is a schematic structural diagram of a cutterhead according to an embodiment of the present utility model; fig. 3 is a schematic diagram of a second structure of a cutterhead according to an embodiment of the present utility model; fig. 4 is an exploded view of a cutterhead according to an embodiment of the present utility model; fig. 5 is a schematic structural diagram of a shield in a tunnel boring machine according to an embodiment of the present utility model; fig. 6 is a schematic structural diagram of a first shield in a tunnel boring machine according to an embodiment of the present utility model; FIG. 7 is a first state diagram of a tunnel boring machine according to an embodiment of the present utility model when the tunnel boring machine is reducing; FIG. 8 is a second state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model; FIG. 9 is a third state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model; FIG. 10 is a fourth state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model; FIG. 11 is a fifth state diagram of a tunnel boring machine according to an embodiment of the present utility model when the tunnel boring machine is reducing; fig. 12 is a sixth state diagram of a variable diameter tunnel boring machine according to an embodiment of the present utility model.

Referring to fig. 1 to 12, an embodiment of the present utility model provides a cutterhead 110, where the cutterhead 110 is applied to a tunneling machine 100, the cutterhead 110 includes a first cutterhead 111, a first cutterhead 112, and a first connecting piece 113, and the first cutterhead 112 is annular and coaxially sleeved outside the first cutterhead 111; a plurality of first connecting structures are arranged at intervals on the outer side of the circumference of the first cutter head 111, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the first cutter head 112, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutter head 111 and the first cutter head 112 are relatively fixed in the circumferential direction; the first connection structure and the second connection structure are detachably connected through the first connection member 113 to relatively fix the first cutterhead 112 and the first cutterhead 111 in the axial direction of the cutterhead 110 or to detach the first cutterhead 112 from the first cutterhead 111.

According to the cutter head 110 provided by the embodiment of the utility model, the first cutter head 112 is sleeved outside the first cutter head 111, so that the first connecting structure at the periphery of the first cutter head 111 is clamped with the second connecting structure at the inner side of the first cutter head 112, meanwhile, the first connecting structure and the second connecting structure are connected together through the first connecting piece 113, when the diameter is changed, only the first connecting piece 113 is required to be removed, and then the first cutter head 112 is axially moved from the outer Zhou Yichu of the first cutter head 111, so that the diameter changing process is very convenient.

As shown in fig. 4, in the above-described embodiment, the first connection structure may include the stopper 1111, and the width of the stopper 1111 becomes gradually smaller in the direction along the driving direction of the tunnel boring machine 100; the second connection structure includes the spacing groove 1121 that matches with stopper 1111, and each stopper 1111 corresponds the joint in spacing groove 1121, wherein, makes the width of stopper 1111 diminish gradually, on the one hand can conveniently with stopper 1111 joint in spacing groove 1121, on the other hand can follow the axial and carry out spacing to the second dish, avoids the tunneling in-process, and first blade disc 112 drops (moves in the opposite direction of tunneling direction) from first blade disc 111 because of receiving the pressure of place ahead soil layer. Specifically, the limiting block 1111 may be a boss protruding away from the center direction of the first cutter 111, and a projection shape of the limiting block 1111 along the radial direction of the first cutter 111 is trapezoidal.

As shown in fig. 4, in the above embodiment, the bottom of the limiting slot 1121 may be provided with a first connecting hole, the outer side of the limiting block 1111 is provided with a second connecting hole matched with the first connecting hole, when the limiting block 1111 is clamped in the limiting slot 1121, the first connecting hole and the second connecting hole are communicated along the axial direction of the first cutter 111, and the first connecting piece 113 is simultaneously inserted into the first connecting hole and the second connecting hole, so as to limit the relative movement between the first cutter 111 and the first cutter 112 along the axial direction of the first cutter 111.

As shown in fig. 4, in the above embodiment, a through groove 1122 may be formed between every two adjacent limiting grooves 1121 on the first cutterhead 112, and the through groove 1122 penetrates through two opposite sides of the first cutterhead 112 along the axial direction of the first cutterhead 112, and the radian corresponding to the through groove 1122 in the circumferential direction of the first cutterhead 112 is greater than the radian corresponding to the limiting groove 1121 in the circumferential direction of the first cutterhead 112. By providing the through groove 1122, the first cutterhead 112 can be moved towards the rear of the first cutterhead 111 (opposite to the tunneling direction) when the diameter is changed, so that the first cutterhead 112 can be left in a tunnel without recovering the first cutterhead 112, and the construction difficulty is reduced; specifically, the first connecting piece 113 between the first cutterhead 111 and the first cutterhead 112 can be removed first, then the first cutterhead 112 is moved for a small distance in the tunneling direction, after the first cutterhead 111 and the first cutterhead 112 are completely separated, the first cutterhead 112 can be rotated for a certain angle, so that the limiting blocks 1111 on the first cutterhead 111 are in one-to-one correspondence with the through grooves 1122 on the first cutterhead 112 along the axial direction of the first cutterhead 112, and as the through grooves 1122 penetrate through two opposite sides of the first cutterhead 112 along the axial direction of the first cutterhead 112, the corresponding radian of the through grooves 1122 in the circumferential direction of the first cutterhead 112 is greater than the corresponding radian of the limiting grooves 1121 in the circumferential direction of the first cutterhead 112, therefore, the first cutterhead 112 can be moved in the opposite direction of the tunneling direction, the first cutterhead 112 is located behind the first cutterhead 111, and along with the continuous forward tunneling of the first cutterhead 111, the first cutterhead 112 can be left in a tunnel to form a similar "shell-slough" effect, and the variable diameter efficiency of the cutterhead 110 is effectively improved.

The cutterhead 110 provided by the embodiment of the utility model is applied to a tunnel boring machine 100, and the cutterhead 110 comprises a first cutterhead 111, a first cutterhead 112 and a first connecting piece 113, wherein the first cutterhead 112 is annular and coaxially sleeved outside the first cutterhead 111; a plurality of first connecting structures are arranged at intervals on the outer side of the circumference of the first cutter head 111, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the first cutter head 112, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutter head 111 and the first cutter head 112 are relatively fixed in the circumferential direction; the first connection structure and the second connection structure are detachably connected through the first connection member 113 to relatively fix the first cutterhead 112 and the first cutterhead 111 in the axial direction of the cutterhead 110 or to detach the first cutterhead 112 from the first cutterhead 111. According to the cutter head 110 provided by the embodiment of the utility model, the first cutter head 112 is sleeved outside the first cutter head 111, so that the first connecting structure at the periphery of the first cutter head 111 is clamped with the second connecting structure at the inner side of the first cutter head 112, meanwhile, the first connecting structure and the second connecting structure are connected together through the first connecting piece 113, when the diameter is changed, only the first connecting piece 113 is required to be removed, and then the first cutter head 112 is axially moved from the outer Zhou Yichu of the first cutter head 111, so that the diameter changing process is very convenient.

In addition, the embodiment of the present utility model further provides a tunneling machine 100, where the tunneling machine 100 includes the cutterhead 110 in any one of the foregoing embodiments, and the cutterhead 110 is sleeved outside the first cutterhead 111 by sleeving the first cutterhead 112 on the first cutterhead 111, so that the first connection structure on the outer periphery of the first cutterhead 111 is clamped with the second connection structure on the inner side of the first cutterhead 112, and meanwhile, the first connection structure and the second connection structure are connected together by the first connection member 113, and when the diameter is changed, only the first connection member 113 is required to be removed, and then the first cutterhead 112 is required to be axially removed from the outside Zhou Yichu of the first cutterhead 111, so that the diameter changing efficiency of the tunneling machine 100 is effectively improved.

In the above embodiment, the shield 120 may further include a first shield body 121, a second shield body 122, and a second connector, where the second shield body 122 is coaxially sleeved outside the first shield body 121, and a sliding seal is disposed between the first shield body 121 and the second shield body 122; the second shield 122 and the first shield 121 are detachably connected by a second connector. The first shield 121 has a diameter identical to that of the front first cutterhead 111, and the second shield 122 has a diameter identical to that of the front first cutterhead 112.

As shown in fig. 5 and 6, in the above embodiment, the first shield body 121 may include a joist 1211 extending along the driving direction of the tunnel boring machine 100 and a plurality of support arms 1212 connected between the joist 1211 and the inner wall of the first shield body 121, the plurality of support arms 1212 being spaced apart in the circumferential direction of the first shield body 121; the inner wall of the second shield 122 is provided with a plurality of supporting seats 1221 corresponding to the supporting arms 1212, and each supporting seat 1221 is connected to the corresponding supporting arm 1212. The joist 1211 at the center and the supporting arm 1212 connected between the first shield body 121 and the joist 1211 may serve to reinforce and support the first shield body 121 to improve the structural strength of the first shield body 121, the joist 1211 extends along the center axial direction of the first shield body 121, and auxiliary devices such as a segment 180 assembling machine may be provided on the joist 1211. The supporting seat 1221 is provided to facilitate the reinforcement of the structure of the second shield 122, and on the other hand, the supporting seat 1221 can be conveniently connected with the first shield 121 to be distributed along the axial direction of the second shield 122; specifically, the number of the supporting seats 1221 may be the same as the number of the supporting arms 1212, and the supporting seats 1221 are connected together in a one-to-one correspondence.

In the above embodiment, the second connecting member may include a plurality of thrust seats 123, the number of the thrust seats 123 may be consistent with the number of the supporting seats 1221 and the supporting arms 1212, each pair of supporting seats 1221 and the supporting arms 1212 corresponding to each other in the radial direction may be connected together by one thrust seat 123, one end of the thrust seat 123 is connected to the side surface of the supporting seat 1221, the other end of the thrust seat 123 is connected to one side of the supporting arm 1212, the thrust seat 123 is located at one side of the shield 120 facing away from the tunneling direction of the tunnel boring machine 100, in addition, in the radial direction along the first shield body 121 and the second shield body 122, the supporting seats 1221 and the supporting arms 1212 may be connected together by connecting bolts, and the thrust seat 123 may transmit the thrust force in the axial direction on the second shield body 122 to the first shield body 121, so as to prevent the connecting bolts between the supporting seats 1221 and the supporting arms 1212 from being damaged by shearing forces. Specifically, as shown in fig. 1, the thrust bearing 123 may have a "U-shape" with an opening facing the tunneling direction.

In the above embodiment, the first bin 130 may be enclosed between the first shield body 121 and the first cutterhead 111 of the cutterhead 110, the second bin 140 may be enclosed between the first shield body 121, the second shield body 122 and the first cutterhead 112 of the cutterhead 110, the tunnel boring machine 100 further includes a first slag discharging pipe 150 and a second slag discharging pipe 160, the first slag discharging pipe 150 is communicated with the bottom of the first bin 130, the second slag discharging pipe 160 is communicated with the bottom of the second bin 140, the soil and slag in the first bin 130 may be rapidly discharged through the first slag discharging pipe 150, and the soil and slag in the second bin 140 may be rapidly discharged through the second slag discharging pipe 160, so as to avoid the influence on the tunneling efficiency of the tunnel boring machine 100 due to accumulation of the soil and slag.

As shown in fig. 7 to 12, when the diameter is reduced (from large to small), the components such as the thrust base 123 and the segment erector 170 may be removed first, then a drawing unit 200 is disposed between the installed steel ring 190 (similar to the structure and installation of the segment 180, the half body is made of steel material, and the subsequent welding start frame 210) and the first shield body 121, and the first shield body 121 is drawn backward by the drawing unit 200, so that the first shield body 121 and the second shield body 122 are separated, and the first cutterhead 111 is separated from the first cutterhead 112, after the drawing unit 200 is removed, the welding start frame 210 may be welded at the steel ring 190, and the rear end of the segment 180 after the diameter is changed (diameter is reduced) may abut against the starting frame 210, so as to prevent the segment 180 from shaking when the pushing cylinder 220 reversely pushes the segment 180.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present utility model, and are not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. The cutterhead is characterized by being applied to a tunnel boring machine, and comprises a first cutterhead, a second cutterhead and a first connecting piece, wherein the second cutterhead is annular and coaxially sleeved outside the first cutterhead; a plurality of first connecting structures are arranged on the outer side of the circumference of the first cutterhead at intervals, a plurality of second connecting structures matched with the first connecting structures are arranged on the inner circumference side edge of the second cutterhead, and the first connecting structures and the second connecting structures are correspondingly clamped so that the first cutterhead and the second cutterhead are fixed relatively in the circumferential direction;

The first connecting structure and the second connecting structure are detachably connected through the first connecting piece, so that the second cutterhead and the first cutterhead are relatively fixed in the axial direction of the cutterhead, or the second cutterhead is detached from the first cutterhead;

The first connecting structure comprises a limiting block, and the width of the limiting block is gradually reduced in the tunneling direction along the tunnel boring machine; the second connecting structure comprises limit grooves matched with the limit blocks, and each limit block is correspondingly clamped in each limit groove.

2. The cutterhead of claim 1, wherein a first connecting hole is formed in the bottom of the limiting groove, a second connecting hole matched with the first connecting hole is formed in the outer side of the limiting block, when the limiting block is clamped in the limiting groove, the first connecting hole and the second connecting hole are communicated with each other along the axial direction of the first cutterhead, and the first connecting piece penetrates through the first connecting hole and the second connecting hole at the same time so as to limit relative movement between the first cutterhead and the second cutterhead along the axial direction of the first cutterhead.

3. The cutterhead according to claim 1 or 2, wherein the limiting block is a boss protruding away from the center direction of the first cutterhead, and a projection shape of the limiting block along the radial direction of the first cutterhead is trapezoid.

4. A cutterhead according to claim 3, wherein a through groove is formed between every two adjacent limit grooves on the second cutterhead, the through groove penetrates through two opposite sides of the second cutterhead along the axial direction of the second cutterhead, and the radian corresponding to the through groove in the circumferential direction of the second cutterhead is larger than the radian corresponding to the limit groove in the circumferential direction of the second cutterhead.

5. A tunnel boring machine comprising a cutterhead according to any one of claims 1 to 4.

6. The tunneling machine of claim 5, further comprising a shield comprising a first shield body, a second shield body and a second connector, the second shield body being coaxially disposed outside the first shield body and being sealingly disposed between the first shield body and the second shield body; the second shield body and the first shield body are detachably connected through the second connecting piece.

7. The tunneling machine of claim 6, wherein the first shield body includes a joist extending in a tunneling direction of the tunneling machine and a plurality of support arms connected between the joist and an inner wall of the first shield body, the plurality of support arms being spaced apart along a circumferential direction of the first shield body; the inner wall of the second shield body is provided with a plurality of supporting seats corresponding to the supporting arms, and each supporting seat is connected with the corresponding supporting arm.

8. The tunneling machine of claim 7, wherein the second connector includes a plurality of thrust seats, one end of each thrust seat is connected to a side of the support seat, the other end of each thrust seat is connected to a side of the support arm, and the thrust seat is located on a side of the shield facing away from a tunneling direction of the tunneling machine.

9. The tunneling machine of claim 8, wherein a first bin is defined between the first shield body and the first cutterhead of the cutterhead, a second bin is defined between the first shield body, the second shield body and the second cutterhead of the cutterhead, the tunneling machine further comprises a first slag outlet pipeline and a second slag outlet pipeline, the first slag outlet pipeline is communicated with the bottom of the first bin, and the second slag outlet pipeline is communicated with the bottom of the second bin.