A shield machine cutterhead spacer assembly

Abstract

This utility model relates to the field of tunnel boring machine (TBM) technology, specifically to a TBM cutterhead grid assembly. The TBM cutterhead grid assembly is installed at the muck inlet channel of the cutterhead, which penetrates the cutterhead along its thickness direction. The TBM cutterhead grid assembly includes a base and grid members. The base includes a first side and a second side arranged opposite to each other in a first direction. The first side is connected to the inner wall of the muck inlet channel, and the first direction is orthogonal to the thickness direction of the cutterhead. The grid members cover at least a portion of the second side and at least a portion of the base on one side of the base in the thickness direction of the cutterhead. The grid members are detachably connected to the base. This utility model's TBM cutterhead grid assembly reduces replacement difficulty and improves replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, specifically to a tunnel boring machine cutterhead grid assembly. Background Technology

[0002] The cutterhead of a tunnel boring machine (TBM) is equipped with a muck feed channel, at which a muck feed plate grid is installed to prevent large rocks or insufficiently crushed excavated soil from entering. In related technologies, the muck feed plate grid is typically welded to the cutterhead. To ensure the weld's strength, the muck feed plate grid needs to be made of the same material as the cutterhead, resulting in poor wear resistance and frequent replacement. Furthermore, the welded fixation between the muck feed plate grid and the cutterhead makes grid replacement difficult and inefficient. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a shield tunneling machine cutterhead grid assembly that can reduce replacement difficulty and improve replacement efficiency.

[0004] This utility model discloses a shield machine cutterhead grid assembly, which is used to install at the muck inlet channel of the cutterhead. The muck inlet channel penetrates the cutterhead along its thickness direction. The shield machine cutterhead grid assembly includes: a base, which includes a first side and a second side arranged opposite to each other in a first direction. The first side is connected to the inner wall of the muck inlet channel, and the first direction is orthogonal to the thickness direction of the cutterhead; and a grid member, which covers at least a portion of the second side and at least a portion of the base on one side of the cutterhead in the thickness direction, and the grid member is detachably connected to the base.

[0005] The shield machine cutterhead grid assembly of this utility model fixes the base to the cutterhead by connecting the first side of the base to the inner wall of the slag inlet channel. The grid covers at least a portion of one side of the base in the thickness direction of the cutterhead and at least a portion of the second side to reduce friction on the base and protect it. This allows only the grid to be replaced when replacing the shield machine cutterhead grid assembly. The detachable connection between the grid and the base reduces the difficulty of replacing the grid and improves the replacement efficiency.

[0006] In some embodiments, the shield machine cutterhead grid assembly further includes fasteners, the second side is provided with a first connecting hole, the grid member is provided with a second connecting hole, and the fasteners pass through the second connecting hole and the first connecting hole to connect the base and the grid member.

[0007] In some embodiments, the second connecting hole includes a first segment and a second segment connected in sequence, wherein the cross-sectional area of ​​the first segment is larger than the cross-sectional area of ​​the second segment to form a stepped surface between the first segment and the second segment, and the fastener abuts against the stepped surface.

[0008] In some embodiments, the grid member includes a first grid segment and a second grid segment connected together, the first grid segment covering at least a portion of the base on one side of the cutter head in the thickness direction, and the second grid segment covering at least a portion of the second side.

[0009] In some embodiments, the end face of the first grid segment away from the second grid segment includes an inclined plane, and the end of the inclined plane away from the base is provided with a first chamfer.

[0010] In some embodiments, a second chamfer is provided at the connection between the first grid segment and the second grid segment.

[0011] In some embodiments, the second side includes a first portion and a second portion connected in the thickness direction of the cutter head, the second grid segment covering the first portion of the second side, and the second portion extending in a direction away from the first portion and arranged obliquely in a direction close to the first side.

[0012] In some embodiments, the base has a protrusion on one side of the cutter head in the thickness direction, and the grid member has a recess that mates with the protrusion, with the protrusion fitting within the recess.

[0013] In some embodiments, there are multiple grid assemblies, and the multiple grid assemblies are arranged at intervals on the inner wall surface of the slag inlet channel of the cutterhead. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the cutter head according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the installation of the slag inlet channel and the shield machine cutterhead grid assembly according to an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the shield machine cutterhead grid assembly according to an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the shield machine cutterhead grid assembly from another perspective, according to an embodiment of the present invention.

[0018] Figure 5 This is an exploded view of the shield machine cutterhead grid assembly according to an embodiment of the present invention.

[0019] Figure label:

[0020] Cutterhead 100, slag inlet channel 110

[0021] Grid assembly 120,

[0022] Base 1, first side 11, second side 12, first connecting hole 121, first part 122, second part 123, protrusion 13.

[0023] Grid component 2, second connecting hole 21, first section 211, second section 212, stepped surface 213.

[0024] First slat segment 22, second slat segment 23

[0025] First chamfer 24, second chamfer 25, recess 26, fastener 3. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following is in conjunction with the appendix Figures 1-5 The shield machine cutterhead grid assembly 120 of this utility model embodiment will be described in detail.

[0028] This utility model discloses a shield tunneling machine cutterhead grid assembly 120, which is installed at the muck inlet channel 110 of the cutterhead 100. The muck inlet channel 110 penetrates the cutterhead 100 along its thickness direction. The shield tunneling machine cutterhead grid assembly 120 includes a base 1 and grid members 2. The base 1 includes a first side surface 11 and a second side surface 12 arranged opposite to each other in a first direction. The first side surface 11 is connected to the inner wall surface of the muck inlet channel 110, and the first direction is orthogonal to the thickness direction of the cutterhead 100. The grid member 2 covers at least a portion of the second side surface 12 and at least a portion of the base 1 on one side of the cutterhead 100 in the thickness direction. The grid member 2 is detachably connected to the base 1.

[0029] The shield machine cutterhead grid assembly 120 of this utility model fixes the base 1 to the cutterhead 100 by connecting the first side 11 of the base 1 to the inner wall of the slag inlet channel 110. The grid member 2 covers at least a portion of one side of the base 1 in the thickness direction of the cutterhead 100 and at least a portion of the second side 12 to reduce friction on the base 1 and protect the base 1. When replacing the shield machine cutterhead grid assembly 120, only the grid member 2 needs to be replaced. The detachable connection between the grid member 2 and the base 1 reduces the difficulty of replacing the grid member 2 and thus improves the replacement efficiency.

[0030] It should be noted that, as Figures 1-2 As shown, the cutterhead 100 has a slag inlet channel 110 extending through the thickness of the cutterhead 100, so that slag can enter the conveyor belt receiving trough behind the cutterhead 100 through the slag inlet channel 110. The shield machine cutterhead grid assembly 120, hereinafter referred to as grid assembly 120, is fixedly installed on the inner wall of the slag inlet channel 110. There can be one or multiple grid assemblies 120. When there is only one grid assembly 120, the slag passes through the gap between the grid assembly 120 and the inner wall of the slag inlet channel 110. When there are multiple grid assemblies 120, the slag passes through the gap between two adjacent grid assemblies 120 and the gap between the grid assembly 120 and the inner wall of the slag inlet channel 110. The grid assembly 120 is used to block large rocks or insufficiently crushed slag from entering.

[0031] For ease of description, we will take the example where the slag inlet channel 110 extends in a front-to-back direction, and the thickness direction of the cutterhead 100 is consistent with the front-to-back direction. Specifically, as shown... Figures 3-5 As shown, the first side 11 is connected to the inner wall of the slag inlet channel 110 to fix the base 1 on the cutter head 100, and the grid member 2 covers at least a portion of the front side of the base 1 and at least a portion of the second side 12 to protect the base 1.

[0032] The grating 2 covers at least a portion of the second side 12, which can be understood as: a portion of the second side 12 is covered by the grating 2, while another portion of the second side 12 is not covered by the grating 2. The grating 2 covers at least a portion of the front side of the base 1, which can be understood as: a portion of the front side of the base 1 is covered by the grating 2, while another portion of the front side of the base 1 is not covered by the grating 2.

[0033] Optionally, the base 1 and the cutter head 100 are welded together. The base 1 is made of the same material as the cutter head 100 (e.g., Q355) to ensure the weld strength between the base 1 and the cutter head 100.

[0034] Optionally, the grid member 2 is made of wear-resistant material. By placing the grid member 2 at the location where wear mainly occurs, it helps to protect the base 1 while reducing the replacement frequency of the grid member 2, thereby improving the wear resistance and service life of the grid member 2.

[0035] Understandably, in related technologies, the slag feed plate grid and the cutter head 100 are welded together, requiring cutting and re-welding during replacement, which is complex and time-consuming. Furthermore, since the slag feed plate grid and the cutter head 100 are made of the same material, the poor wear resistance of the slag feed plate grid necessitates frequent replacement, significantly increasing maintenance time and costs. In this embodiment, by welding the base 1 to the cutter head 100 using the same material as the cutter head 100, and by covering the base 1 with a wear-resistant material and detachably connecting it to the base 1, the wear resistance of the grid component 2 is improved while protecting the base 1. This allows the grid assembly 120 to be replaced only by replacing the grid component 2, and the detachable connection between the grid component 2 and the base 1 improves replacement efficiency.

[0036] In some embodiments, the shield machine cutterhead grid assembly 120 further includes a fastener 3. The second side 12 is provided with a first connecting hole 121, and the grid member 2 is provided with a second connecting hole 21. The fastener 3 passes through the second connecting hole 21 and the first connecting hole 121 to connect the base 1 and the grid member 2. The fastener 3 facilitates the installation of the grid member 2 on the base 1, realizing a detachable connection between the grid member 2 and the base 1.

[0037] Specifically, such as Figures 3-5 As shown, the first connecting hole 121 on the base 1 is a blind hole, and the second connecting hole 21 on the grid member 2 is a through hole, so that the fastener 3 can be connected to the first connecting hole 121.

[0038] Optionally, both the first connecting hole 121 and the second connecting hole 21 are threaded holes, realizing the threaded connection between the grid member 2 and the base 1. This solves the inconvenience of replacing the slag inlet plate grid welded to the cutter head 100 in related technologies, improves the convenience of replacing the grid member 2, and reduces maintenance time and cost.

[0039] Optionally, there are multiple first connecting holes 121 and multiple second connecting holes 21. Correspondingly, there are multiple fasteners 3, which are respectively set one-to-one with the multiple first connecting holes 121 and multiple second connecting holes 21, thereby improving the connection stability between the base 1 and the grid member 2.

[0040] In some embodiments, the second connecting hole 21 includes a first segment 211 and a second segment 212 connected in sequence. The cross-sectional area of ​​the first segment 211 is larger than the cross-sectional area of ​​the second segment 212 to form a stepped surface 213 between the first segment 211 and the second segment 212. The fastener 3 abuts against the stepped surface 213.

[0041] Specifically, such as Figure 4 and Figure 5As shown, the aperture of the first section 211 is larger than that of the second section 212 to form a stepped surface 213 between the first section 211 and the second section 212. By hiding the head of the fastener 3 inside the first section 211 and abutting the fastener 3 against the stepped surface 213, the connection between the grid member 2 and the base 1 is strengthened while preventing the fastener 3 from protruding from the grid member 2, thus ensuring the smooth passage of the slag.

[0042] In some embodiments, the grid member 2 includes a first grid segment 22 and a second grid segment 23 connected together, the first grid segment 22 covering at least a portion of one side of the base 1 in the thickness direction of the cutter head 100, and the second grid segment 23 covering at least a portion of the second side 12.

[0043] Specifically, such as Figures 3-5 As shown, the first grid section 22 is located on the front side of the base 1 and covers at least a portion of the base 1, and the second grid section 23 is opposite to the second side 12 and covers at least a portion of the second side 12. By setting the first grid section 22 and the second grid section 23, the front side and the second side 12 of the base 1 can be protected at the same time, reducing the wear on the front end and the second side 12 of the base 1 and improving the service life of the base 1.

[0044] In some embodiments, the end face of the first grid segment 22 away from the second grid segment 23 includes an inclined plane, and the end of the inclined plane away from the base 1 is provided with a first chamfer 24.

[0045] Specifically, such as Figures 3-5 As shown, the end face of the first grid section 22 adjacent to the first side 11 includes an inclined plane. The inclined plane extends from front to back and is arranged inclined in the direction toward the first side 11. The front end of the inclined plane is provided with a first chamfer 24. The setting of the inclined plane and the first chamfer 24 helps to reduce the impact and wear of the slag on the first grid section 22 and extend the service life of the grid member 2.

[0046] Optionally, a second chamfer 25 is provided at the connection between the first grid section 22 and the second grid section 23, which helps to reduce the impact and wear of the slag on the second grid section 23 and extend the service life of the grid component 2.

[0047] In some embodiments, the second side 12 includes a first portion 122 and a second portion 123 connected in the thickness direction of the cutter head 100, the second grid segment 23 covers the first portion 122 of the second side 12, and the second portion 123 extends in a direction away from the first portion 122 and is arranged obliquely in a direction close to the first side 11.

[0048] Specifically, such as Figure 5As shown, the second part 123 extends from front to back and is arranged at an angle toward the first side 11. By setting the second part 123, the size of the first side 11 in the front-back direction can be increased, the welding length of the first side 11 and the cutter head 100 can be increased, the weight of the base 1 can be reduced, and the welding stability of the base 1 and the cutter head 100 can be improved.

[0049] In some embodiments, the base 1 has a protrusion 13 on one side of the cutter head 100 in the thickness direction, and the grid member 2 has a recess 26 that cooperates with the protrusion 13, with the protrusion 13 cooperating in the recess 26.

[0050] Specifically, such as Figures 3-5 As shown, the front side of the base 1 is provided with a protrusion 13, and the rear side of the first grid section 22 is provided with a recess 26. The connection stability between the base 1 and the grid member 2 is improved by the cooperation between the protrusion 13 on the base 1 and the recess 26 on the grid member 2.

[0051] In some embodiments, there are multiple grid assemblies 120, which are spaced apart on the inner wall surface of the slag inlet channel 110 of the cutter head 100.

[0052] Specifically, such as Figure 1 As shown, the cutter head 100 is provided with a plurality of slag inlet channels 110 arranged at intervals along the circumference of the cutter head 100. Each slag inlet channel 110 is provided with a plurality of grid assemblies 120 arranged at intervals. The plurality of grid assemblies 120 are arranged at intervals to form a grid, which facilitates the passage of slag between the grids and between the grid assembly 120 and the inner wall surface of the slag inlet channel 110.

[0053] Optionally, the spacing, strength, and arrangement of the grid components 120 can be adjusted according to geological conditions (such as soft soil, gravel, and hard rock) to adapt to the crushing requirements of different strata and improve the adaptability of the cutterhead 100.

[0054] When the shield machine cutterhead grid assembly 120 of this utility model is installed on the shield machine cutterhead 100, the good wear resistance of the grid assembly 120 can reduce the replacement frequency of the grid assembly 120 while improving the replacement efficiency of the grid assembly 120, thereby improving the working efficiency of the cutterhead 100.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A shield tunneling machine cutterhead grid assembly, characterized in that, The shield machine cutterhead grid assembly is used to install at the muck feed channel of the cutterhead, the muck feed channel penetrating the cutterhead along its thickness direction, and the shield machine cutterhead grid assembly includes: The base includes a first side and a second side arranged opposite to each other in a first direction. The first side is connected to the inner wall of the slag inlet channel. The first direction is orthogonal to the thickness direction of the cutter head. A grid member that covers at least a portion of the second side surface and at least a portion of the base on one side of the cutter head in the thickness direction, the grid member being detachably connected to the base.

2. The shield machine cutterhead grid assembly according to claim 1, characterized in that, It also includes fasteners, the second side is provided with a first connecting hole, the grid member is provided with a second connecting hole, and the fastener passes through the second connecting hole and the first connecting hole to connect the base and the grid member.

3. The shield machine cutterhead grid assembly according to claim 2, characterized in that, The second connecting hole includes a first segment and a second segment connected in sequence. The cross-sectional area of ​​the first segment is larger than the cross-sectional area of ​​the second segment to form a stepped surface between the first segment and the second segment. The fastener abuts against the stepped surface.

4. The shield machine cutterhead grid assembly according to claim 1, characterized in that, The grid member includes a first grid segment and a second grid segment connected together, the first grid segment covering at least a portion of the base on one side of the cutter head in the thickness direction, and the second grid segment covering at least a portion of the second side.

5. The shield machine cutterhead grid assembly according to claim 4, characterized in that, The end face of the first grid segment away from the second grid segment includes an inclined plane, and the end of the inclined plane away from the base is provided with a first chamfer.

6. The shield machine cutterhead grid assembly according to claim 4, characterized in that, A second chamfer is provided at the connection between the first grid segment and the second grid segment.

7. The shield machine cutterhead grid assembly according to claim 4, characterized in that, The second side includes a first portion and a second portion connected in the thickness direction of the cutter head, the second grid segment covering the first portion of the second side, and the second portion extending away from the first portion and arranged obliquely in a direction close to the first side.

8. The shield machine cutterhead grid assembly according to any one of claims 1-7, characterized in that, The base has a protrusion on one side of the cutter head in the thickness direction, and the grid member has a recess that mates with the protrusion, with the protrusion fitting into the recess.

9. The shield machine cutterhead grid assembly according to any one of claims 1-7, characterized in that, There are multiple grid assemblies, and the multiple grid assemblies are arranged at intervals on the inner wall surface of the slag inlet channel of the cutter head.

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