CN107842370B - Removable sword device that tears in sandy pebble stratum - Google Patents
Removable sword device that tears in sandy pebble stratum Download PDFInfo
- Publication number
- CN107842370B CN107842370B CN201711435112.XA CN201711435112A CN107842370B CN 107842370 B CN107842370 B CN 107842370B CN 201711435112 A CN201711435112 A CN 201711435112A CN 107842370 B CN107842370 B CN 107842370B
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- Prior art keywords
- tearing
- seat
- positioning
- tearing knife
- positioning seat
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- 239000000956 alloy Substances 0.000 claims description 34
- 229910045601 alloy Inorganic materials 0.000 claims description 34
- 238000003825 pressing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 3
- 239000004576 sand Substances 0.000 claims 3
- 238000010276 construction Methods 0.000 abstract description 13
- 230000005641 tunneling Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000009434 installation Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a replaceable tearing knife device for a sandy pebble stratum, which solves the technical problems of poor wear resistance, inconvenience in disassembly, low service life and serious influence on construction progress of a tearing knife in the prior art. The invention comprises a tearing knife and a fixing seat for installing the tearing knife, wherein the end face of a knife head of the tearing knife is arc-shaped, a wear-resistant layer is arranged on the knife head, a tearing knife handle of the tearing knife is fixedly arranged in the fixing seat, the fixing seat is fixedly connected to a shield tunneling machine knife head, the fixing seat comprises a left positioning seat and a right opposite positioning seat and a compression seat, a positioning hole is arranged on the positioning seat, a positioning column clamped with the positioning hole is arranged on the tearing knife handle, the tearing knife handle is arranged between the positioning seat and the compression seat and is fastened through a wedging block, and a connecting bottom plate is arranged below the positioning seat and the wedging block. The invention has reasonable structure, low production cost, high impact strength and convenient disassembly and assembly, and has good popularization and application prospect.
Description
Technical Field
The invention relates to the technical field of shield machines, in particular to a replaceable tearing knife device for a sandy pebble stratum.
Background
Along with the acceleration of urban progress and the rapid development of urban construction in China, subway engineering is increasingly increased, and a shield method is used as an advanced construction method and has been widely applied to the construction of subway tunnels. In the large-range and long-distance shield machine construction, most of stratum is full-section or partial-section sandy pebble stratum, and the shield machine construction is performed in the large-area sandy pebble stratum.
The cutter of the shield machine is severely worn during the construction of the sandy pebble stratum, and is easy to break and fall off. When the conditions occur in the tunneling process, the torque of the cutter head of the shield machine is increased, the shield machine is difficult to push, even construction cannot be performed, the cutter is forced to be opened for replacing the cutter, the existing tearing cutter is unreasonable in mounting structure, unchanged in dismounting and serious in delay of the construction period. Meanwhile, collapse of an excavation surface is easy to cause, and serious influence is brought to the construction period and the construction cost of the whole project.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a replaceable tearing knife device for a sandy pebble stratum, which solves the technical problems of poor wear resistance, inconvenient disassembly, low service life and serious influence on construction progress in the prior art.
The technical scheme of the invention is realized as follows: the utility model provides a removable sword device that tears in sandy gravel stratum, including tearing the sword and installing the fixing base of tearing the sword, the terminal surface of the tool bit of tearing the sword becomes arc, be provided with the wearing layer on the tool bit, the fixed setting of tearing the sword handle of a knife of tearing the sword is in the fixing base, fixing base fixed connection is on shield machine blade disc, the fixing base includes the relative positioning seat in a left-right side, compress tightly the seat, be provided with the locating hole on the positioning seat, tear be provided with on the sword handle with the reference column of locating hole looks joint, tear the sword handle and pass through wedging piece (204) fixed setting between positioning seat and compressing tightly the seat, positioning seat and wedging piece below are provided with connecting plate.
Further, the locating hole is a circular hole, and the locating column is a cylinder in interference fit with the circular hole.
Further, the connecting bottom plate passes through bolt assembly and positioning seat fixed connection, and the connecting bottom plate sets up the lower extreme at positioning seat, tearing sword handle of a knife and wedging piece, and the up end of connecting bottom plate closely laminates with the bottom surface of wedging piece.
Further, one end of the tearing knife handle connected with the positioning seat is provided with a wedge-shaped structure, and the positioning seat is provided with a wedge-shaped wall clamped with the wedge-shaped structure.
Further, the left side and the right side of the tearing knife handle and the bottom side are provided with hoisting holes, the hoisting holes on the left side and the right side of the tearing knife handle are mutually symmetrical, the hoisting holes on the bottom side of the tearing knife handle are arranged at the center position of the bottom side of the tearing knife handle, and each hoisting hole is provided with a detachable hoisting bolt.
Further, the end part of the cutter head is provided with a plurality of alloy grooves, a central hard alloy block is embedded in each alloy groove, the height of each central hard alloy block is lower than that of each alloy groove, and end face hard alloy blocks are embedded at the left end and the right end of the cutter head.
Further, the alloy groove is a cuboid groove, a gap is arranged between the wear-resisting layer and the cuboid groove, and the end face hard alloy block is flush with the end face of the tearing knife handle.
The wear-resistant layer is arranged on the cutter head, so that the abrasion of the cutter head in tunneling construction can be effectively protected, the service life of the tearing cutter is prolonged, the end face of the cutter head is arc-shaped, the contact area of the cutter edge and a stratum is small, the cutting force acting on the stratum is large, and the tunneling efficiency can be effectively improved; the central hard alloy block is arranged on the cutter head, so that the impact strength of the cutter head can be effectively improved, and the alloy groove on the cutter head can be effectively protected from high-strength impact by the hard alloy block arranged on the end face of the cutter head; the left and right opposite positioning seats, the pressing seats and the wedging blocks are arranged, so that the freedom degrees of the tearing knife in the left and right direction, the front and back direction and the up and down direction can be reliably limited, the installation stability of the wedging blocks can be ensured by the arrangement of the connecting bottom plate, the falling off of the wedging blocks is avoided, and the installation reliability of the tearing knife is effectively ensured; the lifting holes are formed, so that the tearing knife can be moved and transported conveniently, and the lifting holes at the bottom side of the knife handle of the tearing knife can be used for quickly replacing the tearing knife. The invention has reasonable structure, high impact strength and convenient disassembly and assembly, and has good popularization and application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the A-A plane of FIG. 1;
fig. 3 is a schematic view of the tearing knife in fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, in embodiment 1, a replaceable tearing knife device for a sandy pebble stratum comprises a tearing knife 1 and a fixing seat 2 for installing the tearing knife 1, wherein the end face 102 of a knife head 101 of the tearing knife 1 is arc-shaped, and a wear-resistant layer 103 is deposited on the knife head 101. The tearing knife handle 104 of the tearing knife 1 is fixedly arranged in the fixed seat 2, and the fixed seat 2 is fixedly welded on the shield tunneling machine cutterhead 3. The fixing seat 2 comprises a left positioning seat 201 and a right positioning seat 202 which are opposite, a positioning 203 is arranged on the positioning seat 201, and a positioning column 105 which is clamped with the positioning hole 203 is arranged on the tearing knife handle 104.
The tearing knife handle 104 is arranged between the positioning seat 201 and the pressing seat 202 and is fastened through the wedging block 204, and a connecting bottom plate 205 is arranged below the positioning seat 201 and the wedging block 204. The connecting bottom plate 205 is fixedly connected with the positioning seat 201 through the bolt assembly 206, the connecting bottom plate 205 is blocked at the lower ends of the positioning seat 201, the tearing knife handle 104 and the wedging block 204, and the upper end face of the connecting bottom plate 205 is tightly attached to the lower end face of the wedging block 204. The wedging block 204 can fasten the tearing knife handle 104 to the greatest extent, the defect that the tearing knife 1 is loose due to the common connection mode is avoided, and the reliability of the installation of the tearing knife is effectively ensured.
In embodiment 2, the positioning hole 203 is a circular hole, and the positioning column 105 is a cylinder in interference fit with the circular hole. The positioning holes 203 are arranged as circular holes, and the positioning columns 105 are arranged as cylinders matched with the positioning holes 203, so that the positioning device is simple in structure, convenient to produce and manufacture, convenient to install and detach, and capable of correcting by rotating an installation angle after the cylinders are inserted into the circular holes; the interference fit of the cylinder and the circular hole improves the installation reliability of the tearing knife 1.
Other structures of this embodiment are the same as those of embodiment 1.
In embodiment 3, a replaceable tearing knife device for a sandy pebble stratum is provided, wherein one end of the tearing knife handle 104 connected with the positioning seat 201 is provided with a wedge-shaped structure 106, and the positioning seat 201 is provided with a wedge-shaped wall 207 clamped with the wedge-shaped structure 106. The wedge-shaped structure 106 is matched with the wedge-shaped wall 207, so that the tearing knife 1 can be firmly fixed, and the tearing knife 1 is effectively prevented from loosening.
Other structures of this embodiment are the same as those of embodiment 2.
Embodiment 4, a removable sword device that tears in sandy gravel stratum, the left and right sides and the bottom side of tearing knife handle 104 all are provided with lifting eye 107, and the lifting eye 107 of tearing knife handle 104 left and right sides is symmetrical each other, and the lifting eye 107 of tearing knife handle 104 bottom side sets up in the central point of tearing knife handle 104 bottom side put, and each lifting eye 107 all is equipped with can dismantle the lifting bolt. The provision of the lifting hole 107 not only facilitates the moving shipment of the tearing knife, but also the lifting hole 107 at the bottom side of the handle of the tearing knife can be used for quick replacement of the tearing knife 1.
Other structures of this embodiment are the same as those of embodiment 3.
Embodiment 5, a removable sword device that tears in sandy gravel stratum, tool bit 101 tip is provided with three alloy groove 108, and the inside welding of alloy groove 108 has central carbide piece 109, and the height of central carbide piece 109 is less than the height of alloy groove 108, and the left and right sides of tool bit 101 is inlayed and is had terminal surface carbide piece 110. The central hard alloy block is arranged on the cutter head, so that the impact strength of the cutter head can be effectively improved, the end face hard alloy block arranged on the cutter head can effectively protect an alloy groove on the cutter head from high-strength impact, the height of the central hard alloy block is lower than that of the alloy groove, and the central hard alloy block is convenient to weld in the alloy groove.
Other structures of this embodiment are the same as those of embodiment 4.
In embodiment 6, in the replaceable tearing knife device for the sandy pebble stratum, the alloy groove 108 is a cuboid groove, a gap is formed between the wear-resisting layer 103 and the cuboid groove, and the end face hard alloy block 110 is flush with the end face of the tearing knife handle 104. The alloy groove is set to be rectangular, so that the structure is simple, the processing and the manufacturing are convenient, and the welding of the central hard alloy block in the alloy groove is convenient; the wear-resistant layer and the cuboid-shaped groove are arranged at intervals, so that the central hard metal block can be reliably welded, and damage to the wear-resistant layer during welding of the central hard block is avoided.
Other structures of this embodiment are the same as those of embodiment 5.
The details of the above embodiments are not conventional and are well known to those skilled in the art.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The utility model provides a removable sword device that tears in sandy pebble stratum which characterized in that: the cutter comprises a tearing cutter (1) and a fixing seat (2) for installing the tearing cutter (1), wherein the end face (102) of the cutter head (101) of the tearing cutter (1) is arc-shaped, a wear-resistant layer (103) is arranged on the cutter head (101), a tearing cutter handle (104) of the tearing cutter (1) is fixedly arranged in the fixing seat (2), the fixing seat (2) is fixedly connected to a shield cutter head (3), the fixing seat (2) comprises a left positioning seat (201) and a right positioning seat (202) which are opposite, a positioning hole (203) is formed in the positioning seat (201), a positioning column (105) which is clamped with the positioning hole (203) is arranged on the tearing cutter handle (104), the tearing cutter handle (104) is fixedly arranged between the positioning seat (201) and the pressing seat (202) through a wedging block (204), and a connecting bottom plate (205) is arranged below the positioning seat (201) and the wedging block (204);
One end of the tearing knife handle (104) connected with the positioning seat (201) is provided with a wedge-shaped structure (106), and the positioning seat (201) is provided with a wedge-shaped wall (207) clamped with the wedge-shaped structure (106);
The end part of the tool bit (101) is provided with a plurality of alloy grooves (108), a central hard alloy block (109) is embedded in the alloy grooves (108), and the height of the central hard alloy block (109) is lower than that of the alloy grooves (108);
The alloy groove (108) is a cuboid groove, a gap is arranged between the wear-resistant layer (103) and the cuboid groove, and the end face hard alloy block (110) is flush with the end face of the tearing knife handle (104);
The connecting bottom plate (205) is fixedly connected with the positioning seat (201) through the bolt assembly (206), the connecting bottom plate (205) is arranged at the lower ends of the positioning seat (201), the tearing knife handle (104) and the wedging block (204), and the upper end face of the connecting bottom plate (205) is tightly attached to the bottom face of the wedging block (204).
2. The sand and pebble formation replaceable ripper tool assembly of claim 1, wherein: the positioning holes (203) are round holes, and the positioning columns (105) are cylinders in interference fit with the round holes.
3. A sand and pebble formation replaceable ripper tool assembly according to any one of claims 1-2, wherein: the left side and the right side and the bottom side of the tearing knife handle (104) are provided with lifting holes (107), the lifting holes (107) on the left side and the right side of the tearing knife handle (104) are mutually symmetrical, the lifting holes (107) on the bottom side of the tearing knife handle (104) are arranged at the center position of the bottom side of the tearing knife handle (104), and each lifting hole (107) is provided with a detachable lifting bolt.
4. A sand and pebble formation replaceable ripper tool assembly as in claim 3, wherein: end face hard alloy blocks (110) are inlaid at the left end and the right end of the cutter head (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435112.XA CN107842370B (en) | 2017-12-26 | 2017-12-26 | Removable sword device that tears in sandy pebble stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435112.XA CN107842370B (en) | 2017-12-26 | 2017-12-26 | Removable sword device that tears in sandy pebble stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107842370A CN107842370A (en) | 2018-03-27 |
| CN107842370B true CN107842370B (en) | 2024-05-10 |
Family
ID=61684432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711435112.XA Active CN107842370B (en) | 2017-12-26 | 2017-12-26 | Removable sword device that tears in sandy pebble stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107842370B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590685B (en) * | 2018-04-24 | 2023-08-22 | 中铁工程装备集团有限公司 | Tearing knife assembly and replacing method of tearing knife thereof |
| CN112253222B (en) * | 2020-08-26 | 2022-05-10 | 中煤科工集团沈阳研究院有限公司 | Pipe jacking tunneling equipment for roadway rescue |
| CN114517684B (en) * | 2022-04-20 | 2022-07-15 | 北京城建集团有限责任公司 | Boulder stratum earth pressure balance shield wedging cutter mounting structure and design method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202467852U (en) * | 2012-03-30 | 2012-10-03 | 常德市中天精密工具有限公司 | Arc-shaped advancing cutter for shield machine |
| CN202788863U (en) * | 2012-06-21 | 2013-03-13 | 洛阳九久技术开发有限公司 | Heavy type tearing cutter used for shield machine |
| CN205297585U (en) * | 2015-11-17 | 2016-06-08 | 中国建筑土木建设有限公司 | Sword is torn to shield structure machine and fixing system thereof |
| CN205654353U (en) * | 2016-04-21 | 2016-10-19 | 中铁工程装备集团有限公司 | Removable shield constructs tears sword girff |
| CN207761656U (en) * | 2017-12-26 | 2018-08-24 | 中铁工程装备集团有限公司 | A kind of replaceable tearing knife system of sand-pebble layer |
-
2017
- 2017-12-26 CN CN201711435112.XA patent/CN107842370B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202467852U (en) * | 2012-03-30 | 2012-10-03 | 常德市中天精密工具有限公司 | Arc-shaped advancing cutter for shield machine |
| CN202788863U (en) * | 2012-06-21 | 2013-03-13 | 洛阳九久技术开发有限公司 | Heavy type tearing cutter used for shield machine |
| CN205297585U (en) * | 2015-11-17 | 2016-06-08 | 中国建筑土木建设有限公司 | Sword is torn to shield structure machine and fixing system thereof |
| CN205654353U (en) * | 2016-04-21 | 2016-10-19 | 中铁工程装备集团有限公司 | Removable shield constructs tears sword girff |
| CN207761656U (en) * | 2017-12-26 | 2018-08-24 | 中铁工程装备集团有限公司 | A kind of replaceable tearing knife system of sand-pebble layer |
Non-Patent Citations (1)
| Title |
|---|
| 卵砾石地层盾构刀具改造技术研究;刘华;;技术与市场(第06期);第95-98页 * |
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| Publication number | Publication date |
|---|---|
| CN107842370A (en) | 2018-03-27 |
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