CN117145504A - Shield constructs quick-witted preceding sword structure suitable for weak soil stratum - Google Patents
Shield constructs quick-witted preceding sword structure suitable for weak soil stratum Download PDFInfo
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- CN117145504A CN117145504A CN202311265840.6A CN202311265840A CN117145504A CN 117145504 A CN117145504 A CN 117145504A CN 202311265840 A CN202311265840 A CN 202311265840A CN 117145504 A CN117145504 A CN 117145504A
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- cutter
- plate
- wall
- handle
- wedge
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- 239000002689 soil Substances 0.000 title claims abstract description 32
- 230000005641 tunneling Effects 0.000 claims abstract description 26
- 241000276425 Xiphophorus maculatus Species 0.000 claims abstract description 3
- 230000013011 mating Effects 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The shield machine cutter structure suitable for the soft soil stratum comprises a cutter body, a cutter box and a right triangle wedge block, wherein the cutter body is provided with a cutter head cutter handle and a plate-shaped cutter seat, the cutter handle is connected to one side face of the plate-shaped cutter seat in the thickness direction and protrudes outwards, positioning inclined planes are arranged on two side faces of the plate-shaped cutter seat in the width direction, and positioning grooves are formed in the positioning inclined planes; a cutter handle groove is formed in the inner wall of one side of the cutter box in the thickness direction, and a guide groove is formed in the inner wall of the cutter box in the width direction; the wedge inlays to be established between location inclined plane and tool box inner wall and lock on the location inclined plane, and the inclined plane of wedge is equipped with location boss, right angle face and is equipped with the gib block, when the handle of a knife holds in the handle of a knife groove, has the clearance between handle of a knife inslot wall and the handle of a knife outer wall, and when wedge locking, the location boss inlays to be established in the constant head tank, and the gib block inlays to establish and support tightly in the guide way, can enough form the support to the platy blade holder, can utilize the micrometric displacement of handle of a knife in the handle of a knife inslot to realize the buffering again, can satisfy the tunneling requirement in weak soil stratum.
Description
Technical Field
The invention relates to the technical field of shield machines, in particular to a shield machine pilot cutter structure suitable for a soft soil stratum.
Background
The shield machine is a large engineering machine for tunneling a cutterhead in a stratum or a mountain body so as to form a tunnel, the large engineering machine is widely used for tunnel engineering such as subways, railways, highways, municipal administration, hydropower and the like, main force cutters for tunneling the cutterhead are first leading cutters, most of traditional leading cutters are welded on the cutterhead and can be replaced only by flame cutting (welding), the limited degree is high, the cutter cannot be replaced in time after abrasion, in order to solve the problem, part of the shield machine adopts a sliding groove plug-in leading cutters, but because of the existence of the sliding groove, more installation space can be occupied, the arrangement of other cutters on the cutterhead can be influenced, and part of the shield machine adopts leading cutters with cutter boxes, the cutter boxes are installed from the earth bin side, but in order to ensure the fixing effect and the lifting strength, the cutter box sizes of the leading cutters are always large, the opening of the cutterhead structure is required to be sacrificed, the cutter box structure is unreasonable, the fixing effect on the leading cutters is weak, the strength of the leading cutters is difficult to lift the leading cutters, the leading cutters cannot be impacted by the impact resistance, the leading cutters are extremely easy to break and fall off under the sudden impact of residual pebbles in a soft soil stratum, and the requirements of the tunneling of a soft soil stratum are difficult to meet.
Disclosure of Invention
The invention aims to overcome one or more defects in the prior art and provides a shield tunneling machine pilot cutter structure suitable for soft soil stratum.
In order to achieve the above purpose, the technical scheme provided by the invention is that the shield machine leading knife structure suitable for soft soil stratum comprises:
the cutter body comprises a cutter head, a cutter handle and a plate-shaped cutter holder, wherein the cutter head is connected to the top of the plate-shaped cutter holder, the cutter handle is connected to one side face of the plate-shaped cutter holder in the thickness direction and protrudes outwards, the end face of the cutter handle, which is far away from the plate-shaped cutter holder, is a waist-shaped face or a round face, positioning inclined planes are arranged on two side faces of the plate-shaped cutter holder in the width direction, are positioned on one side, which is far away from the cutter head, of the plate-shaped cutter holder and retract inwards, and positioning grooves extending along the extending direction of the positioning inclined planes are formed in the positioning inclined planes;
the cutter box is of a hollow cuboid structure and sleeved on the cutter body, the cutter box is formed by vertically connecting four side plates, a cutter handle groove for accommodating the cutter handle is formed in the inner wall of one side of the thickness direction of the cutter box, when the cutter handle is accommodated in the cutter handle groove, a gap is formed between the inner wall of the cutter handle groove and the outer wall of the cutter handle, and a guide groove extending along the length direction of the cutter box is formed in the inner wall of the width direction of the cutter box;
the wedge, the wedge inlays to be established between the location inclined plane with tool case width direction's inner wall and lock on the location inclined plane, the wedge is right triangle-shaped wedge, the inclined plane of wedge be equipped with constant head tank assorted location boss, the wedge orientation the right angle face of tool case width direction inner wall be equipped with guide way assorted gib block the wedge locking time, the location boss inlays to be established in the constant head tank, the gib block inlays to be established in the guide way and support tightly the guide way.
Preferably, the shield tunneling machine leading knife structure further comprises a locking plate, wherein the locking plate is connected with the end face, far away from the knife head, of the platy knife holder, and the locking plate is used for propping against the wedge-shaped block.
Still preferably, the end face of the plate-shaped tool apron, which is far away from the tool bit, is vertically provided with a first threaded blind hole, the bottom wall of the positioning groove is provided with a second threaded blind hole parallel to the first threaded blind hole, the locking plate is provided with a first through hole corresponding to the first threaded blind hole, the positioning boss is provided with a second through hole corresponding to the second threaded blind hole, the second through hole penetrates through the wedge block along the length direction of the plate-shaped tool apron, the shield machine pilot cutter structure further comprises a first bolt and a second bolt, the first bolt penetrates through the first through hole and is locked in the first threaded blind hole, the second bolt penetrates through the second through hole and is locked in the second threaded blind hole, a gap is reserved between the inner wall of the second through hole and the outer wall of the second bolt, when the first bolt is locked, the locking plate abuts against the wedge block, when the second bolt is locked, the positioning boss slides relative to the positioning groove, and the guide bar is squeezed in the guide groove.
Still preferably, the locking plate is further provided with a threaded through hole, the threaded through hole is located at two sides of the first through hole and corresponds to the first threaded blind hole, and the threaded through hole is internally connected with a locking screw for propping against the second bolt.
Further preferably, the threaded through hole is a countersunk hole, and when the first bolt is locked, the head of the second bolt is located in the countersunk hole.
Preferably, the shield tunneling machine leading knife structure further comprises an L-shaped inserting plate, the L-shaped inserting plate is composed of a bottom plate and an inclined plate, the end face of the side plate is provided with the knife handle groove, the inclined plate is inserted between the side face of the plate-shaped knife holder, which is far away from the knife handle, and the inner wall of the knife box in the thickness direction, the side face of the inclined plate, which faces the inner wall, is an inclined plane, the thickness of the inclined plate is gradually reduced in the length direction of the knife box, and when the bottom plate is locked, the inclined plane abuts against the inner wall, so that the plate-shaped knife holder and the inclined plate are tightly extruded in the knife box.
Further preferably, the inclined surface has an inclination angle of 2 ° to 5 °.
Further preferably, the inner wall of the tool box facing the inclined plane is a matching surface which is obliquely arranged, and the matching surface is matched with the inclined plane.
Still preferably, the end face of the side plate where the cutter handle groove is located is provided with a third threaded blind hole, the bottom plate is provided with a third through hole, the shield machine leading cutter structure further comprises a third bolt penetrating through the third through hole and locked in the third threaded blind hole, and the bottom plate is further provided with a through groove for exposing the locking plate.
Preferably, the upper end of the tool bit is provided with an embedded groove and an inclined plane, the embedded grooves are arranged in a plurality of and spaced mode, the embedded grooves penetrate through the tool bit in the thickness direction, the embedded grooves are internally provided with hard blocks used for cutting into soft soil strata, and the inclined plane is located on two sides of the tool bit and used for reducing impact received by the tool bit when cutting into the soft soil strata.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. when the wedge block is locked, the positioning boss is embedded in the positioning groove, the guide strip is embedded in the guide groove and tightly pressed in the guide groove, and the guide strip can be abutted against the guide groove to form a support for the plate-shaped tool apron, so that the tool bit can smoothly cut into a soft soil stratum.
2. When the cutter handle is accommodated in the cutter handle groove, a gap is reserved between the inner wall of the cutter handle groove and the outer wall of the cutter handle, and when pebble impact is encountered, micro-displacement of the cutter handle in the cutter handle groove can be utilized for buffering, breakage and falling are avoided, and accordingly tunneling requirements of soft soil stratum are met.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.
Fig. 2 is an exploded perspective view of a preferred embodiment of the present invention.
Fig. 3 is a schematic perspective view of the tool-holding case of fig. 1, with the view direction adjusted for ease of viewing.
Fig. 4 and 5 are schematic cross-sectional views of fig. 1.
Wherein: 10. a cutter body; 11. a cutter head; 111. embedding grooves; 112. a hard mass; 113. chamfering; 12. a plate-shaped tool apron; 121. positioning an inclined plane; 122. a positioning groove; 123. a first threaded blind hole; 124. a second threaded blind hole; 13. a knife handle; 20. a tool box; 21. a side plate; 22. a knife handle groove; 23. a third threaded blind hole; 24. a mating surface; 25. a guide groove; 30. wedge blocks; 31. positioning the boss; 32. a guide bar; 33. a second through hole; 40. a locking plate; 41. a first through hole; 42. a threaded through hole; l plugboard; 51. a bottom plate; 511. a third through hole; 512. a through groove; 52. a sloping plate; 521. an inclined plane; 61. a first bolt; 62. a second bolt; 63. a third bolt; 64. locking screws.
Detailed Description
The up-down and left-right directions described in the present invention are up-down and left-right directions in fig. 4, and the front-back directions described in the present invention are left-right directions in fig. 5.
As shown in fig. 1 to 5, the shield tunneling machine pilot cutter structure applicable to soft soil layer provided by the invention comprises: the cutter body 10, the cutter box 20, the wedge block 30, the locking plate 40 and the L plugboard 50; the cutter body 10 comprises a cutter head 11, a cutter handle 13 and a plate-shaped cutter holder 12, wherein the cutter head 11 is connected to the top (upper end part) of the plate-shaped cutter holder 12, an embedded groove 111 and an inclined surface 113 are formed in the upper end part of the cutter head 11, a plurality of embedded grooves 111 are formed in the embedded groove 111 at intervals, the embedded groove 111 penetrates through the cutter head 11 along the thickness direction, a hard block 112 for cutting into a soft soil stratum is embedded in the embedded groove 111, the hard block 112 can be hard alloy or diamond, and the inclined surface 113 is positioned on the left side and the right side of the cutter head 11 and used for reducing impact applied to the cutter head 11 when cutting into the soft soil stratum; the cutter handle 13 is connected to the front side surface of the plate-shaped cutter holder 12 in the thickness direction and protrudes outwards, the protruding distance of the cutter handle 13 is 35% -45% of the thickness of the plate-shaped cutter holder 12, the end surface (front end surface) of the cutter handle 13 away from the plate-shaped cutter holder 12 is a waist-shaped surface, and in other embodiments, the end surface can also be a round surface; the plate-shaped tool holder 12 is plate-shaped, the length direction thereof is up and down, the width direction thereof is left and right, the thickness direction thereof is front and rear, positioning inclined surfaces 121 are provided on both side surfaces of the plate-shaped tool holder 12 in the width direction, the positioning inclined surfaces 121 are located on one side (lower side) of the plate-shaped tool holder 12 away from the tool bit 11 and are retracted (gradually retracted downward and inward), and positioning grooves 122 extending along the extending direction of the positioning inclined surfaces 121 are provided on the positioning inclined surfaces 121.
The tool box 20 is of a hollow cuboid structure and is sleeved on the tool body 10, specifically, the tool box 20 is formed by vertically connecting four side plates 21, the length direction of the tool box 20 is the up-down direction, the width direction is the left-right direction, the thickness direction is the front-back direction, the front side inner wall of the tool box 20 in the thickness direction is provided with a tool handle groove 22 for accommodating the tool handle 13, the dimension (length, width and height) of the tool handle groove 22 is slightly larger than the dimension (length, width and height) of the tool handle 13, when the tool handle 13 is accommodated in the tool handle groove 22, a gap is reserved between the inner wall of the tool handle groove 22 and the outer wall of the tool handle 13, and two inner walls of the tool box 20 in the width direction are provided with guide grooves 25 extending along the length direction of the tool box 20.
The wedge 30 is a right triangle wedge (the projection of the wedge 30 in the front and back directions is a right triangle), the wedge 30 is embedded between the positioning inclined plane 121 and the two inner walls of the cutter case 20 in the width direction and is locked on the positioning inclined plane 121, the inclined plane of the wedge 30 is provided with a positioning boss 31 matched with the positioning groove 122, the right angle surface of the wedge 30 facing the inner wall of the cutter case 20 in the width direction is provided with a guide strip 32 matched with the guide groove 25, the other right angle surface of the wedge 30 is provided with a second through hole 33, when the wedge 30 is locked, the positioning boss 31 is embedded in the positioning groove 122, and the guide strip 32 is embedded and squeezed in the guide groove 25.
The locking plate 40 is connected to the end surface (lower end surface) of the plate-shaped tool holder 12 away from the tool bit 11, and the locking plate 40 is used for abutting against the wedge-shaped block 30 to prevent the wedge-shaped block 30 from falling off accidentally.
The L insert plate 50 is composed of a bottom plate 51 and an inclined plate 52, the ends of which are vertically connected, the bottom plate 51 is locked to the lower end surface of the side plate 21 (front side plate) provided with the shank groove 13, the inclined plate 52 is interposed between the side surface (rear side surface) of the plate-shaped tool holder 12 away from the shank 13 and the rear inner wall of the tool box 20 in the thickness direction, and the inclined plate 52 is used for abutting the plate-shaped tool holder 12 forward to hold the shank 13 in the shank groove 22.
The advantages of this arrangement are that:
1. when the wedge block is locked, the positioning boss is embedded in the positioning groove, the guide strip is embedded in the guide groove and tightly pressed in the guide groove, and the guide strip can be abutted against the guide groove to form a support for the plate-shaped tool apron, so that the tool bit can smoothly cut into a soft soil stratum.
2. When the cutter handle is accommodated in the cutter handle groove, a gap is reserved between the inner wall of the cutter handle groove and the outer wall of the cutter handle, and when pebble impact is encountered, micro-displacement of the cutter handle in the cutter handle groove can be utilized for buffering, breakage and falling are avoided, and accordingly tunneling requirements of soft soil stratum are met.
In order to facilitate the disassembly and assembly of the tool body 10 and ensure the abutting effect, further, the side surface (rear side surface) of the inclined plate 52 facing the front inner wall of the tool box 20 in the thickness direction is an inclined surface 521, the inclination angle of the inclined surface 521 is 2 ° to 5 °, the thickness of the inclined plate 52 is gradually reduced in the length direction of the tool box 20, and when the bottom plate 51 is locked, the inclined surface 521 can abut against the front inner wall of the tool box 20 in the thickness direction, so that the plate-shaped tool apron 12 and the inclined plate 52 are pressed into the tool box 20.
For convenience of connection and locking, in this embodiment, the center of the end surface (lower end surface) of the plate-shaped tool holder 12 far from the tool bit 11 is vertically provided with a first threaded blind hole 123, the bottom wall of the positioning groove 122 is provided with a second threaded blind hole 124 parallel to the first threaded blind hole 123, the locking plate 40 is provided with a first through hole 41 corresponding to the first threaded blind hole 123, the second through hole 33 on the wedge block 30 penetrates through the positioning boss 31 and corresponds to the second threaded blind hole 124, the second through hole 33 penetrates through the wedge block 30 along the length direction of the plate-shaped tool holder 12, the shield machine pilot cutter structure further comprises a first bolt 61 and a second bolt 62, wherein the first bolt 61 penetrates through the first through hole 41 and is locked in the first threaded blind hole 123, the second bolt 62 penetrates through the second through hole 33 and is locked in the second threaded blind hole 124, a gap is reserved between the inner wall of the second through hole 33 and the outer wall of the second bolt 62, when the first bolt 61 is locked, the left end and the right end of the locking plate 40 abuts against the wedge block 30, and when the second bolt 62 is locked, the positioning boss 31 slides relative to the positioning groove 122, so that the guide bar 32 abuts against the guide bar 25.
In order to conveniently adjust the degree of abutting the wedge block 30 and realize adjustable and controllable secondary locking, in the embodiment, the locking plate 40 is also provided with threaded through holes 42, the threaded through holes 42 are positioned at two sides of the first through hole 41 and are arranged corresponding to the first threaded blind holes 123, and locking screws 64 for abutting the second bolts 62 are connected in the threaded through holes 42 in a threaded manner; to avoid toppling, further, the threaded through-hole 42 is a counter-bore in which a substantial portion of the head of the second bolt 62 is located when the first bolt 61 is tightened.
In order to facilitate the insertion and removal of the L-insert 50 and improve the stability of the L-insert 50 against the plate-shaped tool holder 12, in this embodiment, the inner wall of the tool box 20 facing the inclined surface 521 (the rear inner wall in the thickness direction) is a mating surface 24 disposed obliquely, the degree of inclination of the mating surface 24 matches with the inclined surface 521, and when the bottom plate 51 is locked, the inclined surface 521 is engaged with and abuts against the mating surface 24.
In order to facilitate the locking connection of the bottom plate 51, further, the lower end surface of the side plate 21 (front side plate) where the shank groove 22 is located is provided with third threaded blind holes 23, the third threaded blind holes 23 are four and equidistantly arranged at intervals, the bottom plate 51 is provided with third through holes 511 corresponding to the third threaded blind holes 23 one by one, the shield machine leading knife structure further comprises third bolts 63 penetrating through the third through holes 511 and locked in the third threaded blind holes 23,
in order to facilitate adjusting the locking degree of the locking screw 64, in this embodiment, a through slot 512 for exposing the locking plate 40 is further formed on the bottom plate 51, and the through slot 512 is located at the rear of the third through hole 511.
Due to the adoption of the structure, the shield tunneling machine pilot cutter structure also has the advantages of small size, good fixing effect and high strength, and is more suitable for tunneling operation of soft soil stratum.
In actual use, cutter case 20 is inserted through the cutter head of the shield machine, cutter head 11 extends out of the cutter head and faces the face, and bottom plate 51 faces the soil bin without shielding.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a shield constructs quick-witted advance sword structure suitable for weak soil stratum which characterized in that includes:
the cutter body comprises a cutter head, a cutter handle and a plate-shaped cutter holder, wherein the cutter head is connected to the top of the plate-shaped cutter holder, the cutter handle is connected to one side face of the plate-shaped cutter holder in the thickness direction and protrudes outwards, the end face of the cutter handle, which is far away from the plate-shaped cutter holder, is a waist-shaped face or a round face, positioning inclined planes are arranged on two side faces of the plate-shaped cutter holder in the width direction, are positioned on one side, which is far away from the cutter head, of the plate-shaped cutter holder and retract inwards, and positioning grooves extending along the extending direction of the positioning inclined planes are formed in the positioning inclined planes;
the cutter box is of a hollow cuboid structure and sleeved on the cutter body, the cutter box is formed by vertically connecting four side plates, a cutter handle groove for accommodating the cutter handle is formed in the inner wall of one side of the thickness direction of the cutter box, when the cutter handle is accommodated in the cutter handle groove, a gap is formed between the inner wall of the cutter handle groove and the outer wall of the cutter handle, and a guide groove extending along the length direction of the cutter box is formed in the inner wall of the width direction of the cutter box;
the wedge, the wedge inlays to be established between the location inclined plane with tool case width direction's inner wall and lock on the location inclined plane, the wedge is right triangle-shaped wedge, the inclined plane of wedge be equipped with constant head tank assorted location boss, the wedge orientation the right angle face of tool case width direction inner wall be equipped with guide way assorted gib block the wedge locking time, the location boss inlays to be established in the constant head tank, the gib block inlays to be established in the guide way and support tightly the guide way.
2. The shield tunneling machine pilot structure applicable to soft soil strata according to claim 1, wherein: the shield tunneling machine leading knife structure further comprises a locking plate, wherein the locking plate is connected to the end face, far away from the cutter head, of the platy knife holder, and the locking plate is used for propping against the wedge-shaped block.
3. The shield tunneling machine pilot structure applicable to soft soil stratum according to claim 2, wherein: the shield tunneling machine pilot cutter comprises a cutter head, a positioning plate, a positioning boss, a wedge-shaped block, a shield tunneling machine pilot cutter, a guide strip, a first bolt, a second bolt, a locking plate, a first through hole, a second through hole, a wedge-shaped block, a first bolt and a second bolt, wherein the first through hole is formed in the end face, far away from the cutter head, of the cutter head, the second through hole is formed in the bottom wall of the positioning groove, the second through hole is parallel to the first through hole, a gap is formed between the inner wall of the second through hole and the outer wall of the second bolt, when the first bolt is locked, the locking plate is abutted against the wedge-shaped block, when the second bolt is locked, the positioning boss slides relative to the positioning groove, and the guide strip is pressed in the guide groove.
4. The shield tunneling machine pilot structure applicable to soft soil layer according to claim 3, wherein: the locking plate is further provided with threaded through holes, the threaded through holes are located on two sides of the first through holes and correspond to the first threaded blind holes, and locking screws used for propping against the second bolts are connected in the threaded through holes in a threaded mode.
5. The shield tunneling machine pilot structure applicable to soft soil stratum according to claim 4, wherein: the threaded through hole is a countersunk hole, and when the first bolt is locked, the head of the second bolt is positioned in the countersunk hole.
6. The shield tunneling machine pilot structure applicable to soft soil strata according to claim 1, wherein: the shield tunneling machine advanced knife structure further comprises an L inserting plate, the L inserting plate is composed of a bottom plate and an inclined plate, the end portions of the bottom plate are vertically connected, the bottom plate is locked on the end face of the side plate of the knife handle groove, the inclined plate is inserted between the side face, away from the knife handle, of the plate-shaped knife holder and the inner wall in the thickness direction of the knife box, the side face, facing the inner wall, of the inclined plate is an inclined face, in the length direction of the knife box, the thickness of the inclined plate is gradually reduced, and when the bottom plate is locked, the inclined face abuts against the inner wall, so that the plate-shaped knife holder and the inclined plate are pressed in the knife box.
7. The shield tunneling machine pilot structure applicable to soft soil stratum according to claim 6, wherein: the inclined surface has an inclination angle of 2 DEG to 5 deg.
8. The shield tunneling machine pilot structure applicable to soft soil stratum according to claim 6, wherein: the tool box is towards the inner wall of inclined plane is the mating surface that the slope set up, the mating surface with inclined plane assorted.
9. The shield tunneling machine pilot structure applicable to soft soil stratum according to claim 6, wherein: the end face of the side plate where the cutter handle groove is located is provided with a third threaded blind hole, the bottom plate is provided with a third through hole, the shield tunneling machine leading cutter structure further comprises a third bolt which penetrates through the third through hole and is locked in the third threaded blind hole, and the bottom plate is further provided with a through groove for exposing the locking plate.
10. The shield tunneling machine pilot structure applicable to soft soil strata according to claim 1, wherein: the upper end of tool bit is equipped with and inlays groove and chamfer, it has a plurality of and interval setting to inlay the groove, inlay the groove and run through along thickness direction the tool bit, it is equipped with the stereoplasm piece that is used for cutting into soft soil stratum to inlay the inslot, the chamfer is located the both sides of tool bit are used for reducing the impact that the tool bit receives when cutting into soft soil stratum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311265840.6A CN117145504A (en) | 2023-09-28 | 2023-09-28 | Shield constructs quick-witted preceding sword structure suitable for weak soil stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311265840.6A CN117145504A (en) | 2023-09-28 | 2023-09-28 | Shield constructs quick-witted preceding sword structure suitable for weak soil stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117145504A true CN117145504A (en) | 2023-12-01 |
Family
ID=88908147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311265840.6A Pending CN117145504A (en) | 2023-09-28 | 2023-09-28 | Shield constructs quick-witted preceding sword structure suitable for weak soil stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117145504A (en) |
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2023
- 2023-09-28 CN CN202311265840.6A patent/CN117145504A/en active Pending
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