CN210509179U

CN210509179U - Shield cutter head

Info

Publication number: CN210509179U
Application number: CN201921198006.9U
Authority: CN
Inventors: 付春青; 王秋生; 张功; 郑瑞兵; 徐鹏程; 李黎
Original assignee: Beijing Uni Construction Group Co Ltd
Current assignee: Beijing Uni Construction Group Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-12
Anticipated expiration: 2029-07-26

Abstract

A shield cutter head at least comprises a fixed part and a plurality of movable parts. A plurality of the movable part all articulates to the fixed part, wherein: the fixed part at least comprises a spoke-shaped fixed plate and a fixed part main body fixedly connected with the spoke-shaped fixed plate, and the movable part is hinged in a hinge gap formed by each adjacent sub-fixed plate of the spoke-shaped fixed plate. The sub-fixing plate with equal detachably installs the first hobbing cutter of a plurality of on the movable part, a plurality of cutter is all installed to the side of sub-fixing plate. Under the condition that the movable part is under the action of external force, a first included angle between the movable part and the fixing part main body can be increased or decreased in a mode that the movable part rotates around a hinge point between the movable part and the fixing part. The utility model discloses can dredge the slag notch automatically, the cutter is changed convenient safety, and it is convenient to shut down and restart among the tunnelling process.

Description

Shield cutter head

Technical Field

The utility model relates to a shield constructs quick-witted technical field, especially relates to a shield constructs blade disc.

Background

The shield machine is a tunnel boring machine using a shield method, and with the rapid advance of the urbanization process in China, a large number of people rush into cities, which is a serious challenge to urban traffic. In order to relieve traffic pressure, more and more cities begin to build subways, and the adoption of the shield tunneling machine for excavating underground passages has the advantages of small excavation amount, small influence on the environment and the like, so that the underground tunnel is widely used. The cutter is a main cutting tool in shield tunneling, and is an important factor influencing construction distance and speed, and further an important factor influencing engineering cost. The cutters are basically arranged on the cutter head, the phenomenon that the cutters are worn and need to be replaced possibly occurs in the tunneling process, and the process of replacing the cutters is difficult because the shield tunneling machine can only advance. When the cutter is replaced, the shield tunneling machine needs to stop propelling, and after the replacement is completed, the cutter head and the cutter still cling to or are embedded in a soil layer due to the fact that the cutter head cannot retreat, and the shield tunneling machine is difficult to start due to the fact that the cutter head and the cutter are started again due to the fact that resistance is generated in the soil layer.

Chinese patent with publication number CN204703911U discloses a novel cutter head of shield machine, including apical surface portion, supporting part and cooperation portion, apical surface portion is located the cutter head middle part, and supporting part and cooperation portion encircle apical surface portion setting, be equipped with crushing unit and cutting part on the supporting part, crushing unit sets up on the supporting part surface, and the cutting part sets up in the supporting part side, apical surface portion includes the depressed part, is equipped with crushing unit in the depressed part, cooperation portion sets up at the cutter head edge, is equipped with the scraper in the cooperation portion, and crushing unit includes the pivot, fixing base and a plurality of rolling portion, and the pivot is located rolling portion middle part, and sets up between the fixing base, is equipped with the recess between the rolling portion, and rolling portion edge interval is equipped with a plurality of cutting parts. The rock soil is cut and excavated through the crushing assemblies, the cutting parts and the scrapers at different positions, so that the excavating efficiency is improved; through the improvement to crushing unit and scraper structure, strengthened its life. However, the replacement of the cutter of the device needs the worker to be carried out on the working surface of the cutter head, and the working surface of the cutter head is almost tightly attached to the soil layer in the tunneling process, so although the cutter of the device is detachable, the replacement of the cutter is not easy to realize due to narrow operation space, and the device cannot solve the technical problem that the cutter head is difficult to start due to overlarge resistance when being restarted.

Moreover, on the one hand, since the skilled person in the art who is understood by the applicant is necessarily different from the examination department; on the other hand, since the inventor studied a lot of documents and patents when making the present invention, but the space limit did not list all details and content in detail, however, this is by no means the present invention does not possess these prior art features, but on the contrary the present invention has possessed all features of the prior art, and the applicant reserves the right to increase the related prior art in the background art at any time according to the relevant regulations of the examination guideline.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shield constructs blade disc to be not enough to prior art, the utility model provides a shield constructs blade disc includes fixed part and a plurality of movable part at least. A plurality of the movable part all articulates to the fixed part, wherein: the fixed part at least comprises a spoke-shaped fixed plate and a fixed part main body fixedly connected with the spoke-shaped fixed plate, and the movable part is hinged in a hinge gap formed by each adjacent sub-fixed plate of the spoke-shaped fixed plate. The sub-fixing plate with equal detachably installs the first hobbing cutter of a plurality of on the movable part, a plurality of cutter is all installed to the side of sub-fixing plate. Under the condition that the movable part is under the action of external force, a first included angle between the movable part and the fixing part main body can be increased or decreased in a mode that the movable part rotates around a hinge point between the movable part and the fixing part.

According to a preferred embodiment, the first end face of the spoke-like fixing plate is connected by an extension to a flange arranged coaxially to the fixing portion body, wherein: supporting mechanisms are arranged between the movable part and the flange plate, and the supporting mechanisms are hinged with the movable part and the flange plate.

According to a preferred embodiment, a first mounting hole is formed in each of the sub-fixing plate and the movable portion in a penetrating manner, and the first hob is mounted inside the first mounting hole in a nested manner through a first mounting frame, wherein: under the condition that the first mounting frame is subjected to external force, the distance between the first hob and the sub-fixing plate or the movable part can be increased or decreased according to the mode that the first mounting frame slides along the first mounting hole.

According to a preferred embodiment, a second mounting hole is formed in the center of the spoke-shaped fixing plate in a penetrating manner, and a plurality of second hobs are nested and mounted inside the second mounting hole through a second mounting frame, wherein: under the action of external force, the distance between the second hob and the spoke-shaped fixing plate can be increased or decreased according to the mode that the second mounting frame slides along the axial direction of the second mounting hole.

According to a preferred embodiment, the first mounting frame comprises at least a first mounting frame body in the shape of a hollow cylinder, the first end of the first mounting frame body being provided with a rib in an integrally formed manner, wherein: the first mounting frame main part is provided with at least one first shaft hole in a mode of penetrating along the radial direction of the first mounting frame main part, and the flange is provided with a plurality of first fixing holes in a mode of extending along the axial direction of the first mounting frame main part. The first hob is installed inside the first installation frame main body in a mode of rotating around a central axis of the first shaft hole through a first rotating shaft. Under the condition that the first mounting frame is under the action of external force, the rib can abut against or separate from the first end surface of the sub-fixing plate or the first end surface of the movable part in a sliding mode of the first mounting frame main body in the first mounting hole.

According to a preferred embodiment, the second mounting frame comprises at least a mounting plate on which at least two brackets are provided, wherein: the support plate is provided with at least one second shaft hole in a penetrating mode, and the mounting plate is provided with a plurality of second fixing holes in a penetrating mode. And the second hobs are arranged on the second mounting frame in a mode of rotating around the central axis of the second shaft hole through a second rotating shaft. Under the condition that the second mounting frame is under the action of external force, the mounting plate can abut against or be separated from the first end surface of the spoke-shaped fixing plate according to the mode that the second mounting frame moves along the axial direction of the second mounting hole.

According to a preferred embodiment, the fixing body is in the shape of a hollow cylinder, and the side of the fixing body is provided with a plurality of first wear strips in an evenly distributed manner, wherein: the first wear-resistant strip at least comprises a semi-cylindrical first wear-resistant strip main body, and a plurality of inclined grooves are formed in the first wear-resistant strip main body in a mode that the axis of the first wear-resistant strip main body and the axis of the first wear-resistant strip main body form a second included angle.

According to a preferred embodiment, the sub-fixing plate is fan-shaped, the arc-shaped edges of the second end surface of the sub-fixing plate are provided with round corners, and the round corners are respectively provided with a plurality of third hobs and a plurality of second wear strips.

According to a preferred embodiment, the movable portion is fan-shaped, a plurality of third wear-resistant strips are arranged on the movable portion, the movable portion is hinged to the spoke-shaped fixing plate through a first hinge shaft arranged inside the hinge notch, and a slag discharge opening is formed by the movable portion and an area defined by the sub-fixing plate. Under the condition that the movable part is acted by external force and rotates around the central axis of the first hinge shaft, the volume of the slag discharging opening can be increased or reduced.

According to a preferred embodiment, the sub-fixing plate is provided with a plurality of foam injection holes in a penetrating manner.

The utility model has the advantages of:

(1) the utility model discloses a articulate the movable part to the fixed part and realize under supporting mechanism's effect that the movable part rotates around its pin joint with the fixed part, and then can realize this shield structure blade disc's operating condition adjustment, meanwhile, the volume of row's cinder notch can change, can be through the operating condition of adjustment blade disc in order to dredge row's cinder notch when the condition that the excavation in-process met row's cinder notch and blockked up.

(2) The utility model discloses a first hobbing cutter and first mounting bracket cooperation, second hobbing cutter and second mounting bracket complex mode can realize the cutter at the non-working face of blade disc and change, need not to change around its working face of hugging closely the soil layer, and its operating space is big, and is efficient.

(3) The utility model discloses a control the operating condition of blade disc, can see through the slag notch at the non-working face of blade disc and change the cutter.

(4) The utility model discloses when changing the cutter, at first pass through the supporting mechanism with the blade disc and adjust to second operating condition, then make it operate under the condition that does not tunnel to the soil layer that the movable part touched complete the clean-up shut down again, change when the cutter and accomplish the back, pass through the supporting mechanism with the blade disc and adjust to first operating condition, the working face of blade disc this moment and treat to tunnel and appear enough big clearance between the soil layer, the blade disc can not receive the influence of soil layer resistance again when the shield constructs the machine once more for its restart becomes easy.

Drawings

Fig. 1 is a schematic right-view structural view of a preferred shield cutter head of the present invention in a second working state;

fig. 2 is a schematic front view of a preferred shield cutter head of the present invention in a first operating state;

fig. 3 is a schematic right-view structural view of a preferred shield cutter head of the present invention in a first working state;

fig. 4 is a rear view structural diagram of a preferred shield cutter head of the present invention in a first working state;

fig. 5 is a schematic perspective view of a preferred shield cutter head according to the present invention in a first working state;

fig. 6 is a schematic perspective view of a preferred shield cutter head according to the present invention in a second working state;

fig. 7 is a schematic perspective view of a preferred fixing portion of the present invention;

fig. 8 is a schematic perspective view of a preferred spoke-like fixing plate according to the present invention;

fig. 9 is a schematic cross-sectional view of a preferred first mounting bracket of the present invention;

fig. 10 is a schematic perspective view of a preferred second mounting bracket of the present invention;

fig. 11 is a schematic front view of a first preferred wear strip of the present invention;

FIG. 12 is a schematic cross-sectional view of the first hob and the first shaft of the present invention; and

fig. 13 is a schematic perspective view of the preferred second hob and the second rotating shaft of the present invention.

List of reference numerals

1: first hob 2: a slag discharge port 3: fixing part

4: third sipe 5: and (3) a third hob 6: second wear resistant strip

7: third wear resistant strip 8: the movable portion 9: second mounting rack

10: and (3) a second hob 11: flange 12: hinge gap

13: a cutter 14: first mounting bracket 15: first wear resistant strip

16: the support mechanism 17: extension 18: foam injection hole

19: first rotating shaft 20: second rotation shaft 141: first mounting bracket main body

142: the rib 143: first shaft hole 144: first fixing hole

151: first wear strip body 152: chute 301: first mounting hole

302: second mounting hole 303: spoke-like fixing plate 304: fixing part main body

305: the sub-fixing plate 306: first hinge shaft 307: round corner

901: mounting plate 902: second fixing hole 903: supporting plate

904: second shaft hole

α first included angle β second included angle

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

As shown in fig. 1 to 13, a shield cutterhead of the present invention comprises at least a fixed portion 3 and a plurality of movable portions 8, the plurality of movable portions 8 are hinged to the fixed portion 3, as shown in fig. 2, preferably, the plurality of movable portions 8 are in a fan shape with a uniform shape, the movable portions 8 are welded with a plurality of third wear-resistant strips 7 distributed at equal intervals, the wear-resistant strips can reduce the wear of the working surface of the movable portions 8 during the driving of the cutterhead and improve the service life of the cutterhead, as shown in fig. 7, preferably, the fixed portion 3 comprises at least a spoke-shaped fixed plate 303 and a fixed portion main body 304 fixedly connected with the spoke-shaped fixed plate 303, the fixed portion main body 304 is preferably in a hollow cylinder shape, the fixed portion main body 304 here serves as a fixed support, the fixed portion 3 can be fixedly connected with the spoke-shaped fixed plate 303 by welding or screwing to form the cutterhead, as shown in fig. 7, preferably, the spoke-shaped fixed portion 303 is in a cross shape, four extending ends of the spoke-shaped fixed portion 305, the spoke-shaped fixed plate 305, the spoke-shaped fixed portion is formed by a plurality of notches, the movable portions 306 are hinged with a plurality of movable portions 12, the movable portions are hinged rib plates 12, the movable portions are hinged to form a set of hinged joint shaft, the hinge joints, the movable portions are formed by a set of the hinge joints, the movable portions 12, the hinge joints, the movable portions are formed by a set of the movable portions 12, the movable portions are formed by uniformly, the hinge joints.

Specifically, a first working state of the cutter head as shown in fig. 5 and a second working state as shown in fig. 6 can be formed by hinging the movable part 8 to the fixed part 3, preferably, the area defined by the movable part 8 and the sub-fixing plate 305 forms the slag discharge port 2, under the condition that the movable part 8 is acted by external force and rotates around the central axis of the first hinging shaft 306, the volume of the slag discharge port 2 can be increased or reduced, in the tunneling process of the shield tunneling machine, due to the influence of factors such as complexity of soil layer structure, the condition that the volume of soil layers or rocks is too large and the slag discharge port 2 is blocked due to incomplete crushing can occur, the construction is influenced, after the condition occurs, a worker can adjust the cutter head from the conventional first working state to the second working state under the condition that the shield tunneling machine does not advance as a whole, in the process, the position of the fixed part 3 in the tunneling direction is not changed, the movable part 8 continues to be pushed in the direction in the manner of rotating around the central axis of the first hinging shaft 306, the volume of the slag discharge port 2 is adjusted along with the first working state 304, the problem that the slag discharge port is increased, the problem that the blockage caused by manual dredging operation is solved, the problem that the blockage of the blockage during the first working state, the dredging operation of the shield tunneling machine, the blockage is solved, the blockage of the blockage, the blockage of the blockage, the blockage of the.

Preferably, the first end face of the spoke-like fixing plate 303 is connected to the flange 11 arranged coaxially with the fixing portion body 304 by the extension portion 17. Preferably, the extension portion 17 may have a hollow cylindrical shape, a first end of which is welded to the first end surface of the spoke-shaped fixing plate 303, and a second end of which is welded to the flange plate 11. In order to reduce the radial run-out of the cutter head, it is preferable that the spoke-like fixing plate 303, the extension 17 and the flange 11 are coaxially arranged. The flange 11 is used for installing the cutter head on the shield tunneling machine main body, and preferably, a plurality of bolt holes for connecting the cutter head with the shield tunneling machine main body are arranged on the flange 11 in a penetrating and uniformly distributed mode. Preferably, a support mechanism 16 is provided between the movable portion 8 and the flange 11. The supporting mechanism 16 is hinged with both the movable part 8 and the flange 11. As shown in fig. 3, the support mechanism 16 may be a hydraulic cylinder, and the working state of the cutter head is switched and adjusted by controlling the extension and contraction length of the support mechanism 16. For example, when the cutterhead is in the first working state, the movable portion 8 abuts against the fixing portion main body 304, the supporting mechanism 16 is in the original length at this time, and when the cutterhead needs to be adjusted from the first working state to the second working state, the supporting mechanism 16 is started to extend, so that the movable portion 8 is pushed to rotate around the central axis of the first hinge shaft 306 until the cutterhead is in the second working state.

As shown in fig. 2, preferably, a plurality of first rolling cutters 1 are detachably mounted on both the sub-fixing plate 305 and the movable portion 8. The first hob 1 is used to break rock. The side of the sub-fixing plate 305 is provided with a plurality of cutters 13 through bolts. As shown in fig. 7, the sub-fixing plate 305 and the movable portion 8 are preferably provided with first mounting holes 301 penetrating therethrough. The first hob 1 is nested inside the first mounting hole 301 by means of the first mounting frame 14, wherein: in case that the first mounting bracket 14 is subjected to an external force, the distance between the first roller cutter 1 and the sub-fixing plate 305 or the movable part 8 can be increased or decreased in such a manner that the first mounting bracket 14 slides along the first mounting hole 301. As shown in fig. 9, it is preferable that the first mount 14 includes at least a first mount body 141 having a hollow cylindrical shape. The first end of the first mount body 141 is provided with a rib 142 in an integrally formed manner. The rib 142 serves as a limiting function, and the first hob 1 is nested inside the first mounting frame body 141 in use. The first mount body 141 is provided with at least one first shaft hole 143 penetrating in a radial direction thereof. The first shaft holes 143 may be one or more holes formed to extend in the axial direction of the first mounting bracket body 141, and the first hob 1 may be installed in the different first shaft holes 143 according to different tunneling environments, so that the length of the first hob 1 extending out of the first mounting bracket body 141 is adjusted, and the first hob 1 is more efficiently used for tunneling. The rib 142 is provided with a plurality of first fixing holes 144 in such a manner as to extend in the axial direction of the first mounting bracket body 141. The first fixing holes 144 are used for fixing the first mounting frame 14 and the first hob 1 mounted inside the first mounting frame 14 on the cutterhead by matching bolts or screws. The first hob 1 is rotatably attached to the inside of the first mounting bracket body 141 around the center axis of the first shaft hole 143 by a first rotating shaft 19. As shown in fig. 12, the first shaft 19 is preferably rotatably mounted inside the first shaft hole 143 through a bearing, which effectively reduces the rotational friction. In the case where the first mounting bracket 14 is subjected to an external force, the rib 142 can abut against or be detached from the first end surface of the fixed plate 305 or the first end surface of the movable portion 8 in such a manner that the first mounting bracket main body 141 slides in the first mounting hole 301. As shown in fig. 4, the first end surface of the sub-fixing plate 305 and the first end surface of the movable portion 8 are both non-working surfaces, where the non-working surfaces are defined by the end away from the soil during the cutterhead excavation process. For example, when the cutter needs to be replaced during the tunneling process, the cutter head is first adjusted to the second working state on the premise that the whole shield machine is not tunneled, the soil layer touched by the movable part 8 is completely cleaned and then stopped, and at this time, the spoke-shaped fixing plates 303 keep a certain distance from the soil layer to be excavated in front. If the cutter needing to be replaced is arranged on the spoke-shaped fixing plate 303, the cutter head can be kept in the second working state, a worker can reach the working surface of the cutter head through the slag discharge hole 2 to check the condition of the cutter in detail, and the first mounting frame 14 where the corresponding cutter is located is detached from the cutter head in a non-working mode and replaced after the problem is determined; if the cutter needing to be replaced further comprises the movable part 8, after the worker finds the target cutter, the cutter head is adjusted to the first working state from the second working state, and then the worker replaces the cutter on the non-working surface of the cutter head. Through the adjustment to cutter operating condition, can widen staff's operating space. At the moment, the working surface of the cutterhead in the first working state has a certain gap from the soil layer to be tunneled, and when the cutterhead is started, the friction torque applied to the cutterhead by the soil layer is small, so that the cutterhead can be started again easily. Preferably, the sub-fixing plate 305 has a fan shape. A fillet 307 is arranged at the arc-shaped edge of the second end face of the sub-fixing plate 305. The round corners 307 are respectively provided with a plurality of third hobs 5 and welded with a plurality of second wear-resistant strips 6. As shown in fig. 2, a third cutter groove 4 in a rectangular parallelepiped shape is provided in a region of a fillet 307 of the sub-fixing plate 305, the outer shape of the third cutter 5 is identical to that of the first cutter 1, and the installation manner of the third cutter groove 4 is identical to that of the first cutter 1 in the first mounting frame 14, which is not described herein again. The third roller cutters 5 here effect a rock breaking action in the circumferential direction of the cutterhead.

Preferably, the spoke-shaped fixing plate 303 is provided with a second mounting hole 302 at a central position thereof in a penetrating manner. A plurality of second roller cutters 10 are nested and mounted inside the second mounting holes 302 through the second mounting frame 9. Preferably, the second mounting bracket 9 includes at least a mounting plate 901. The mounting plate 901 is welded with at least two brackets 903. As shown in fig. 10, the support plates 903 support the second hob 10, the number of the support plates may be four, and the support plates are distributed in a symmetrical manner in pairs according to the manner shown in fig. 10, and only one group, that is, two support plates are needed in actual work, and the rest support plates 903 are used for standby. The plate 903 is provided with at least one second shaft hole 904 therethrough. The mounting plate 901 is provided with a plurality of second fixing holes 902 in a penetrating manner. As shown in fig. 10, the second shaft holes 904 may be provided on the support plate 903 in a manner of extending in a direction perpendicular to the end surface of the mounting plate 901, and the distances between the central axes of the second shaft holes 904 and the mounting plate 901 are different, so that the length of the second hob 10 extending out of the second mounting hole 302 can be adjusted in actual operation. A plurality of second roller cutters 10 are mounted to the second mounting frame 9 via a second shaft 20 in such a way that they can rotate about the centre axis of the second shaft holes 904. As shown in fig. 13, the plurality of second roller cutters 10 are coaxially mounted on the second rotating shaft 20, and the second rotating shaft 20 is mounted inside the second shaft hole 904 through a bearing. In the case where the second mounting bracket 9 is subjected to an external force, the mounting plate 901 can abut against or be separated from the first end surface of the spoke-shaped fixing plate 303 in such a manner that the second mounting bracket 9 moves in the axial direction of the second mounting hole 302, and the distance between the second roller 10 and the spoke-shaped fixing plate 303 can be increased or decreased in such a manner that the second mounting bracket 9 slides in the axial direction of the second mounting hole 302. The second hob 10 can here be replaced in the non-working face of the cutterhead by removing the second mounting frame 9. The second fixing holes 902 are used for fixing the second hob 10 together with the second mounting frame 9 to the first end surface of the spoke-like fixing plate 303 by means of bolts or screws.

Preferably, a plurality of first wear strips 15 are welded on the side face of the fixing part main body 304 in an evenly distributed manner, as shown in fig. 3 and 11, each first wear strip 15 at least comprises a semi-cylindrical first wear strip main body 151, a plurality of inclined grooves 152 are arranged on the first wear strip main body 151 in a manner that the axis of each first wear strip main body is in a second included angle β with the axis of the first wear strip main body 151, and the driving direction of the cutter head is consistent with the axial direction of the first wear strip 15, so that the cutter head is always in a rotating state in the driving process, the inclined grooves 152 are designed in a manner that the axis of each inclined groove 152 and the axis of the first wear strip main body 151 are in the second included angle β, so that the first wear strips 15 have a self-tapping screw function to a certain extent, and a certain axial force is applied to the cutter head through soil layers when the cutter head rotates, which is beneficial to the driving operation of the shield machine, and the inclined grooves 152 can also remove excessive soil to a certain extent, thereby avoiding the risk to workers caused by the.

Preferably, the sub-fixing plate 305 is provided with a plurality of foam injection holes 18 in a penetrating manner. The foam injection hole 18 is used for injecting foam into the excavation face during the excavation process, so that the smooth discharge of the dregs is facilitated and the stability of the excavation face is kept.

Preferably, the first wear-resistant strip 15, the second wear-resistant strip 6 and the third wear-resistant strip 7 may be polycrystalline wear-resistant strips with a gauge protection in the publication number CN206722837U, and have high hardness, so that the wear of the cutter head can be effectively prevented.

In order to facilitate understanding, the working principle of the shield cutter head of the utility model is discussed.

When the cutter head is used for excavating and cutting, the conventional working mode is a first working state, namely the movable part 8 and the fixed part 3 are in the same plane, when the situation that the slag discharging port 2 is blocked is met in the excavating and cutting process, a worker can adjust the cutter head from the first working state to a second working state through controlling the supporting mechanism 16 under the condition that the shield machine main body is not excavated, in the process, the size of the slag discharging port 2 can be changed continuously, automatic dredging of the slag discharging port 2 can be realized, and the cutter head can be adjusted back to the first working state to continue the operation after the dredging is finished; when the cutter needs to be replaced and maintained, the cutter head is adjusted to be in the second working state by repeating the operation, then the cutter head is enabled to be operated to the soil layer contacted by the movable part 8 and completely cleaned, and then the machine is stopped, a certain gap is formed between the working surface of the cutter head and the soil layer to be excavated at the moment, a worker can reach the working surface of the cutter head through the slag discharge port 2 to check the cutter, then the cutter is disassembled and replaced on the non-working surface of the cutter head, so that the cutter is safer and more efficient to disassemble and replace, and the cutter head is more labor-saving and easier to restart due to the fact that a certain gap is reserved between the cutter head and the soil layer to be excavated, therefore, when the machine is stopped and maintained each time, the cutter head is adjusted to be in the second working state from the first working state and operated to.

It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. The utility model provides a shield constructs blade disc, includes fixed part (3) and a plurality of movable part (8) at least, a plurality of movable part (8) all articulate to fixed part (3), wherein:

the fixed part (3) at least comprises a spoke-shaped fixed plate (303) and a fixed part main body (304) fixedly connected with the spoke-shaped fixed plate (303), and the movable part (8) is hinged in a hinge notch (12) formed by each adjacent sub-fixed plate (305) of the spoke-shaped fixed plate (303);

a plurality of first hobs (1) are detachably arranged on the sub fixing plate (305) and the movable part (8), and a plurality of cutters (13) are arranged on the side surface of the sub fixing plate (305);

under the condition that the movable part (8) is acted by external force, a first included angle (α) between the movable part (8) and the fixing part main body (304) can be increased or decreased according to the mode that the movable part (8) rotates around a hinge point between the movable part and the fixing part (3).

2. A shield cutterhead according to claim 1, wherein the first end face of the spoke-like stationary plate (303) is connected by an extension (17) to a flange (11) arranged coaxially with the stationary body (304), wherein:

supporting mechanisms (16) are arranged between the movable part (8) and the flange plate (11), and the supporting mechanisms (16) are hinged to the movable part (8) and the flange plate (11).

3. A shield cutterhead according to claim 2, wherein a first mounting hole (301) is provided through each of said sub-stationary plate (305) and said movable portion (8), said first hob (1) being nestingly mounted inside said first mounting hole (301) by means of a first mounting frame (14), wherein:

under the condition that the first mounting frame (14) is subjected to external force, the distance between the first hob (1) and the sub-fixing plate (305) or the movable part (8) can be increased or decreased according to the mode that the first mounting frame (14) slides along the first mounting hole (301).

4. A shield cutterhead according to claim 3, wherein a second mounting hole (302) is provided through the central position of the spoke-like fixed plate (303), and a plurality of second hobs (10) are nested and mounted inside the second mounting hole (302) through a second mounting frame (9), wherein:

under the condition that the second mounting frame (9) is subjected to external force, the distance between the second hob (10) and the spoke-shaped fixing plate (303) can be increased or decreased according to the mode that the second mounting frame (9) slides along the axial direction of the second mounting hole (302).

5. A shield cutterhead according to claim 4, wherein the first mounting frame (14) includes at least a first mounting frame body (141) in the form of a hollow cylinder, the first end of the first mounting frame body (141) being provided with a rib (142) in an integrally formed manner, wherein:

the first mounting frame main body (141) is provided with at least one first shaft hole (143) in a manner of penetrating along the radial direction of the first mounting frame main body, and the flange (142) is provided with a plurality of first fixing holes (144) in a manner of extending along the axial direction of the first mounting frame main body (141);

the first hob (1) is rotatably mounted to the inside of the first mounting bracket body (141) around the central axis of the first shaft hole (143) by a first rotating shaft (19);

when the first mounting bracket (14) is subjected to an external force, the rib (142) can abut against or be separated from the first end surface of the sub-fixing plate (305) or the first end surface of the movable portion (8) in such a manner that the first mounting bracket main body (141) slides in the first mounting hole (301).

6. A shield cutterhead according to claim 5, wherein the second mounting frame (9) includes at least a mounting plate (901), said mounting plate (901) having at least two support plates (903) disposed thereon, wherein:

the support plate (903) is provided with at least one second shaft hole (904) in a penetrating manner, and the mounting plate (901) is provided with a plurality of second fixing holes (902) in a penetrating manner;

a plurality of second roller cutters (10) are arranged on the second mounting frame (9) through second rotating shafts (20) in a mode of rotating around the central axis of the second shaft hole (904);

under the condition that the second mounting frame (9) is subjected to external force, the mounting plate (901) can abut against or be separated from the first end face of the spoke-shaped fixing plate (303) according to the mode that the second mounting frame (9) moves along the axial direction of the second mounting hole (302).

7. A shield tunneling cutterhead according to claim 6, wherein the fixed part body (304) is in the shape of a hollow cylinder, and the side of the fixed part body (304) is provided with a plurality of first wear strips (15) in an evenly distributed manner, wherein:

the first wear-resistant strip (15) at least comprises a semi-cylindrical first wear-resistant strip main body (151), and a plurality of inclined grooves (152) are formed in the first wear-resistant strip main body (151) in a mode that the axis of the first wear-resistant strip main body (151) forms a second included angle (β) with the axis of the first wear-resistant strip main body (151).

8. The shield cutterhead according to claim 7, wherein the sub-static plate (305) is fan-shaped, the arc-shaped edges of the second end surface of the sub-static plate (305) are provided with round corners (307), and the round corners (307) are respectively provided with a plurality of third hobs (5) and a plurality of second wear-resistant strips (6).

9. The shield tunneling cutterhead according to claim 8, wherein the movable portion (8) is fan-shaped, a plurality of third wear-resistant strips (7) are arranged on the movable portion (8), the movable portion (8) is hinged to the spoke-shaped fixing plate (303) through a first hinge shaft (306) arranged in the hinge notch (12), and the area defined by the movable portion (8) and the sub-fixing plate (305) forms a slag discharge opening (2);

under the condition that the movable part (8) is acted by external force and rotates around the central axis of the first articulated shaft (306), the volume of the slag discharging opening (2) can be increased or decreased.

10. A shield cutter head according to claim 9, characterized in that the sub-retainer plate (305) is provided with a plurality of foam injection holes (18) in a penetrating manner.