CN114483071A - Back-loading type hob system - Google Patents
Back-loading type hob system Download PDFInfo
- Publication number
- CN114483071A CN114483071A CN202210044051.9A CN202210044051A CN114483071A CN 114483071 A CN114483071 A CN 114483071A CN 202210044051 A CN202210044051 A CN 202210044051A CN 114483071 A CN114483071 A CN 114483071A
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- Prior art keywords
- wedge
- hob
- axial
- cutter
- box
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- 230000000670 limiting effect Effects 0.000 claims description 15
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000005641 tunneling Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- E21D9/087—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 with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- 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)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
The invention discloses a rear-mounted hob system, belonging to the technical field of application of tunnel excavation equipment; it includes: the hob and the cutter box are connected with each other through a radial connecting assembly and an axial connecting assembly; the hob comprises a hob shaft, a hob hub and end covers arranged on two sides of the hob hub, and the end covers are connected with the hob hub through the hob shaft; the radial connecting assembly comprises a butting plate and wedge blocks, the end cover comprises an inner hole and wedge parts arranged on two sides of the inner hole, the inner hole is in sliding connection with the cutter shaft, the butting plates are arranged on two sides of the inner part of the cutter box and are fixedly connected with the inner wall of the cutter box, the two wedge parts are respectively butted with the butting plate, and the two wedge blocks are arranged between the wedge parts and the inner wall of the cutter box; the axial connecting component comprises an axial wedge block and an axial wedge groove, the axial wedge groove is arranged on the inner wall of the cutter box, the axial wedge groove is inserted into the axial wedge groove, and two sides of the axial wedge block are respectively abutted to the axial wedge groove and the end part of the cutter shaft. The TBM type central hob can be conveniently installed.
Description
Technical Field
The invention relates to the technical field of application of tunnel excavation equipment, in particular to a rear-mounted hob system.
Background
The disc cutter is an excavating tool for crushing hard rock, is arranged at the head of large-scale trenchless construction equipment such as a shield machine, a TBM (tunnel boring machine), a pipe jacking machine and the like, and is used for cutting rock on a tunnel face and stripping the rock from the tunnel face. The method is widely applied to construction of subway tunnels, railway tunnels, diversion tunnels and urban underground pipe networks. Disc cutters typically have a single-edged, double-edged or multi-edged component, often mounted in a radial or helical configuration on the shield cutter head. The shield machine tunnels forwards under the pressure of the jack, the cutter head of the shield machine rotates, and the cutter arranged on the cutter head of the shield machine revolves along with the cutter head and rotates under the friction force and the pressure, so that the cutting edge of the cutter ring is utilized to perform rolling cutting on the surface of the rock.
At present, a common central hob on the market bears tensile stress by means of 6M 33 bolts together, when a cutterhead is in the tunneling process, individual bolts are easy to loosen, so that the stress of the 6 bolts is uneven, when the individual bolts are stressed too much, the bolts are broken, chain reaction occurs after the individual bolts are broken, and finally, other bolts are broken or loosened, so that the hob falls off. In order to upgrade and reform the cutter head of the existing shield machine, the TBM type central hob replaces the existing central hob to be installed on the cutter head of the shield machine, an end cover of the common TBM type central hob in the market is directly installed on a cutter box, the cutter box with good strength is used for bearing the load borne by the hob, and a bolt on one side only plays a limiting role and does not bear the actual load, so that the bolt is not easy to break. However, this type of installation requires a previous drilling and tapping of the cutter head to install the wedges.
In the actual working process, when the shield cutter head provided with the common central hob fails, and a relatively reliable TBM type central hob needs to be replaced, the cutter head is difficult to drill and tap in construction sites such as tunnels, and the damaged common central hob cannot be replaced by the TBM type central hob.
Disclosure of Invention
In view of the above, there is a need for a rear-loading hob system, which solves the problem that the existing TBM-type central hob is difficult to be installed on the cutterhead in the tunnel.
The invention provides a rear-loading hob system, comprising: the hob and the cutter box are connected with each other through a radial connecting assembly and an axial connecting assembly;
the hob comprises a hob shaft, a hob hub and end covers arranged on two sides of the hob hub, and the end covers are connected with the hob hub through the hob shaft;
the radial connecting assembly comprises abutting plates and wedge blocks, the end cover comprises inner holes and wedge parts arranged on two sides of the inner holes, the inner holes are connected with the cutter shafts in a sliding mode, the abutting plates are arranged on two sides inside the cutter box and fixedly connected with the inner wall of the cutter box, the two wedge parts are respectively abutted to the abutting plates, the two wedge blocks are arranged between the wedge parts and the inner wall of the cutter box, and the wedge blocks can be connected with the wedge parts and the cutter box in an abutting mode;
the axial connecting assembly comprises an axial wedge block and an axial wedge groove, the axial wedge groove is formed in the inner wall of the cutter box, the axial wedge groove is inserted into the axial wedge groove, and two sides of the axial wedge block are respectively abutted to the axial wedge groove and the end portion of the cutter shaft.
Furthermore, the wedge part is arranged from the outer side of the end cover to the inner side of the end cover in an inclined mode, and the wedge block is connected with the wedge part in a matched mode so as to limit the movement of the end cover.
Furthermore, the wedge-shaped block positioned on one side of the knife box is fixedly connected with the inner wall of the knife box, and a wedge-shaped groove used for clamping the wedge-shaped part is formed between the wedge-shaped block and the abutting plate.
Furthermore, be located the knife case opposite side the wedge with the butt plate is detachable to be connected, is equipped with the connecting hole in the butt plate, and the bolt warp the connecting hole with the wedge connects soon.
Furthermore, the axial wedge groove is embedded in the cutter box, and the section of the axial wedge groove is wedge-shaped.
Furthermore, an axial tensioning block is arranged below the knife box, two sides of the axial tensioning block are abutted to the bottom of the knife box, a through hole is formed in the middle of the axial tensioning block, and a bolt passes through the through hole and is connected with the axial wedge block in a screwing mode.
Furthermore, one end of the cutter box, which is far away from the axial wedge block, is opened, one end of the cutter shaft is abutted to the axial wedge block, and the other end of the cutter shaft is abutted to a cutter head of the shield tunneling machine through the cutter box.
Furthermore, the bottom of one end cover which is abutted to the axial wedge block is provided with a detachable limiting block, the limiting block protrudes out of the end face of the end cover, and the limiting block is positioned between the end cover and the inner wall of the knife box.
Furthermore, the number of the end covers is three, the number of the cutter hubs is two, the two cutter hubs are arranged between the two adjacent end covers, and the cutter hubs and the end covers are arranged at intervals.
Furthermore, a cutter ring is arranged outside the cutter hub, the cutter ring is sleeved on the cutter hub, and the cutter ring is detachably connected with the cutter hub.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the after-loading type hob system, bolt connection is abandoned, an axial connecting assembly is arranged on one side of the hob shaft and comprises an axial wedge block and an axial wedge groove, the axial wedge groove is formed in the inner wall of the hob box, the axial wedge groove is inserted into the axial wedge groove, two sides of the axial wedge block are respectively abutted to the axial wedge groove and the end portion of the hob shaft, the axial wedge block limits and fixes the axial direction of the hob, and the fixation and release of the hob shaft can be conveniently completed by dismounting and mounting the axial wedge block, so that the repair and replacement of the hob are simplified.
(2) According to the rear-mounted hob system, the abutting plates are arranged on two sides in the hob box and fixedly connected with the inner wall of the hob box, and the abutting plates penetrate into the hob box. Two wedge portions respectively with the butt joint board butt, two wedge sets up between wedge portion and knife box inner wall, through reducing the height of butt joint board and wedge portion, can reduce the distance between the relative knife box bottom of arbor for the high reduction of hobbing cutter, the rotation of hobbing cutter is more stable, vibrates littleer, connects more reliably.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic top view of the present invention;
in the figure, a hob 100, a cutter shaft 110, a cutter hub 120, an end cover 130, an inner hole 131, a wedge part 132, a cutter ring 140, a cutter box 200, a radial connecting assembly 300, an abutting plate 310, a connecting hole 311, a wedge block 320, a wedge groove 330, an axial connecting assembly 400, an axial wedge 410, an axial wedge groove 420, an axial tension block 430, a through hole 431, a limiting block 440 and a shield machine cutter head 500.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1 to 3, in the present embodiment, an after-loading hob system includes: hob 100, a knife box 200, and a radial connection assembly 300 and an axial connection assembly 400 for connecting hob 100 and knife box 200. The hob 100 is mounted in a magazine 200, the magazine 200 is welded to a shield machine cutter head 500, and radial connecting assemblies 300 and axial connecting assemblies 400 are used to position and mount the hob 100.
The hob 100 includes a hob shaft 110, a hob hub 120 and end covers 130 disposed at two sides of the hob hub 120, the hob shaft 110 is inserted into the hob hub 120 and the end covers 130, the hob hub 120 can rotate around the hob shaft 110, and the end covers 130 are relatively stationary with respect to the hob shaft 110. The radial connecting assembly 300 includes an abutting plate 310 and a wedge block 320, the end cap 130 includes an inner hole 131 and wedge portions 132 disposed at two sides of the inner hole 131, and the arbor 110 can slide along the axial direction of the inner hole 131 for axial adjustment. The abutting plates 310 are disposed on two sides of the inside of the knife box 200 and are fixedly connected with the inner wall of the knife box 200, and the abutting plates 310 penetrate into the inside of the knife box 200. Two wedge portions 132 respectively with butt plate 310 butt, two wedge blocks 320 set up between wedge portion 132 and sword case 200 inner wall, through the height that reduces butt plate 310 and wedge portion 132, can reduce the distance between the relative sword case 200 bottom of arbor 110 for hobbing cutter 100's height reduces, and hobbing cutter 100's rotation is more stable, and the vibration is littleer, and wearing and tearing are lower. Wedge block 320 is capable of pressing against connecting wedge 132 and magazine 200 to radially retain and secure hob 100. The wedge block 320 can be disassembled and assembled to the end cap 130 conveniently, so that the hob 100 can be repaired and replaced easily.
The axial connecting assembly 400 comprises an axial wedge 410 and an axial wedge groove 420, the axial wedge groove 420 is arranged on the inner wall of the cutter box 200, the axial wedge groove 420 is inserted into the axial wedge groove 420, two sides of the axial wedge 410 are respectively abutted against the axial wedge groove 420 and the end part of the cutter shaft 110, the axial wedge 410 limits and fixes the axial direction of the hob 100, the cutter shaft 110 can be fixed and detached by detaching the axial wedge 410, and the detachment of the hob 100 is simplified.
Referring to fig. 1, the wedge portion 132 is obliquely disposed from the outer side of the end cap 130 to the inner side of the end cap 130, the wedge block 320 is connected to the wedge portion 132 in a matching manner, and after the wedge portion 132 disposed in an inverted wedge shape is connected to the wedge block 320 in a matching manner, the wedge portion 132 is subjected to both a lateral extrusion force and an upward pressing force, and compared with the wedge portion 132 disposed in a positive wedge shape, the limiting effect is better, and the end cap 130 is more stably fixed.
With reference to fig. 1, the wedge block 320 located at one side of the knife box 200 is fixedly connected to the inner wall of the knife box 200, in the specific implementation process, the wedge block 320 located at one side of the knife box 200 is integrally disposed with the inner wall of the knife box 200, a wedge groove 330 for engaging the wedge portion 132 is formed between the wedge block 320 and the abutting plate 310, the cross-sectional shape of the wedge groove 330 is identical to the shape of the wedge portion 132, and the wedge portion 132 can be inserted into the wedge groove 330 from the side of the end cap 130. The connection stability between the wedge part 132 and the wedge block 320 is further enhanced, so that the end cover 130 can only move along the axial direction of the cutter shaft 110, and the movement in other directions is limited.
The wedge block 320 located on the other side of the knife box 200 is detachably connected with the abutting plate 310, in the specific implementation process, a connecting hole 311 is formed in the abutting plate 310, a bolt penetrates through the abutting plate 310 to be connected with the wedge block 320 in a screwing mode, the wedge block 320 fixes the wedge portion 132, the abutting plate 310 and the wedge block 320 are connected together through the bolt, the wedge portion 132 is further limited and fixed, and meanwhile the wedge block 320 can be prevented from being separated.
Referring to fig. 2, the axial wedge groove 420 is embedded in the tool box 200, the cross section of the axial wedge groove 420 is wedge-shaped, the axial wedge 410 can be inserted into the axial wedge groove 420, the inclined surface of the axial wedge 410 abuts against the inclined surface of the axial wedge groove 420, and the parallel surface of the axial wedge 410 abuts against the end surface of the arbor 110. So that the abutment of the end surface of the arbor 110 and the axial wedge 410 is made tighter.
Referring to fig. 1 to 3, an axial tensioning block 430 is disposed below the knife box 200, two sides of the axial tensioning block 430 are abutted against the bottom of the knife box 200, and the position of the axial tensioning block 430 can be adjusted along the axial direction of the knife shaft 110. The middle part of the axial tensioning block 430 is provided with a through hole 431, a bolt is screwed with the axial wedge block 410 through the through hole 431, the axial tensioning block 430 is connected with the axial wedge block 410 through the bolt, and the bolt pulls the axial tensioning block 430 and the axial wedge block 410 to the middle part of the knife box 200, so that the axial wedge block 410 can be prevented from being separated, and the connection stability can be ensured.
Referring to fig. 2 and 3, one end of the cutter box 200 away from the axial wedge 410 is open, one end of the cutter shaft 110 abuts against the axial wedge 410, and the other end of the cutter shaft 110 abuts against the shield tunneling machine cutter head 500 through the cutter box 200. The cutter shaft 110 can drive the whole axial displacement of the hob 100, and one end of the cutter shaft 110 can be abutted against the inner wall of the cutter box mounting hole by means of the cutter box mounting hole on the cutter head 500 of the shield tunneling machine, so that the manufacturing cost of the cutter box 200 can be reduced, the mounting process of the hob 100 is simplified, and the working time and the cost are saved.
Referring to fig. 1 and 2, a detachable limiting block 440 is disposed at the bottom of one end cover 130 abutting against the axial wedge 410, the limiting block 440 is in an L shape, one side of the limiting block 440 is connected to the bottom of the end cover 130 through a bolt, the other side of the limiting block 440 abuts against the end of the end cover 130 and protrudes out of the end surface of the end cover 130, and the protruding limiting block 440 is located between the end cover 130 and the inner wall of the knife box 200. The stop block 440 can define a minimum distance between the end cap 130 and the inner wall of the knife box 200, leaving a mounting space for the axial wedge 410. Meanwhile, the stop block 440 can prevent the end cap 130 from being separated from the abutment plate 310 during the installation process, so that the hob 100 can slide off the hob box 200.
Referring to fig. 1 and 2, the number of the end caps 130 is three, the number of the cutter hubs 120 is two, two cutter hubs 120 are disposed between two adjacent end caps 130, and the cutter hubs 120 are spaced apart from the end caps 130. In a specific implementation process, the hob 100 may be a single hub, a double hub, or a multiple hub, the cutter ring 140 is mounted on the cutter hub 120, the number of the end covers 130 is one more than that of the cutter hub 120, so that the end covers 130 are disposed on both sides of the cutter hub 120, the end covers 130 are stationary with respect to the cutter shaft 110, the cutter hub 120 rotates with respect to the cutter shaft 110, and the number of the cutter hub 120 and the end portions is not a limitation to the present application. The cutter ring 140 is sleeved outside the cutter hub 120, a limiting boss and a blocking groove are arranged on the cutter hub 120, the hob 100 is located between the limiting boss and the blocking groove, a retaining ring is clamped in the blocking groove and is welded with the blocking groove, the limitation on the hob 100 is completed, and the hob 100 is prevented from being separated from the hob during working.
The hob and the hob box are installed in the following steps:
1. the hob 100 is inserted into the magazine 200 from the back of the magazine 200, the wedge 132 is butted against the wedge groove 330, and translated laterally so that the wedge 132 abuts against the end of the butt plate 310.
2. A stop block 440 is mounted on the end cover 130 to prevent the hob 100 from falling off during the mounting process. The three wedge blocks 320 are inserted between the inner wall of the tool box 200 and the wedge portion 132, and the bolts are not installed, so that the cutter shaft 110 and the end cap 130 can move axially.
3. The axial wedge 410 and the axial tension block 430 are installed and the axial tension block 430 is bolted to the axial wedge 410.
4. The wedge block 320 and the abutment plate 310 are connected by bolts, and the bolts are tightened.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the present invention.
Claims (10)
1. A afterloading hob system, comprising: the hob and the cutter box are connected with each other through a radial connecting assembly and an axial connecting assembly;
the hob comprises a hob shaft, a hob hub and end covers arranged on two sides of the hob hub, and the end covers are connected with the hob hub through the hob shaft;
the radial connecting assembly comprises abutting plates and wedge-shaped blocks, the end covers comprise inner holes and wedge-shaped parts arranged on two sides of the inner holes, the inner holes are connected with the cutter shafts in a sliding mode, the abutting plates are arranged on two sides of the interior of the cutter box and fixedly connected with the inner wall of the cutter box, the two wedge-shaped parts are respectively abutted to the abutting plates, the two wedge-shaped blocks are arranged between the wedge-shaped parts and the inner wall of the cutter box, and the wedge-shaped blocks can be connected with the wedge-shaped parts and the cutter box in an abutting mode;
the axial connecting assembly comprises an axial wedge block and an axial wedge groove, the axial wedge groove is formed in the inner wall of the cutter box, the axial wedge groove is inserted into the axial wedge groove, and two sides of the axial wedge block are respectively abutted to the axial wedge groove and the end portion of the cutter shaft.
2. The afterloader hob system according to claim 1, wherein said wedge portion is inclined from an outer side of said end cap to an inner side of said end cap, said wedge block being cooperatively connected to said wedge portion for limiting movement of said end cap.
3. The afterloader hob system according to claim 2, characterized in that said wedge-shaped block located at one side of said hob box is fixedly connected to the inner wall of said hob box, said wedge-shaped block and said abutment plate forming a wedge-shaped groove therebetween for engaging said wedge-shaped portion.
4. A rear loading hob system according to claim 3, characterized in that the wedge block on the other side of the hob box is detachably connected to the abutment plate, the abutment plate is provided with a connection hole, and a bolt is screwed to the wedge block through the connection hole.
5. The afterloader hob system according to claim 1, wherein said axial wedge groove is embedded in said hob box, said axial wedge groove having a wedge-shaped cross-section.
6. The after-loading hob system according to claim 1, wherein an axial tensioning block is arranged below the hob box, two sides of the axial tensioning block are abutted against the bottom of the hob box, a through hole is arranged in the middle of the axial tensioning block, and a bolt is screwed with the axial wedge block through the through hole.
7. The afterloader hob system according to claim 1, wherein an end of said cutter box remote from said axial wedge is open, one end of said cutter shaft abuts against said axial wedge, and the other end of said cutter shaft abuts against a shield machine cutter head through said cutter box.
8. The afterloader hob system according to claim 1, wherein a bottom of one of said end caps abutting said axial wedge is provided with a removable stop, said stop protruding from an end surface of said end cap, said stop being located between said end cap and an inner wall of said hob case.
9. The afterloader hob system according to claim 1, wherein there are three end caps and two of said cutter hubs are disposed between two adjacent end caps, said cutter hubs being spaced from said end caps.
10. The after-loading hob system according to claim 1, wherein a cutter ring is provided outside the cutter hub, the cutter ring is sleeved on the cutter hub, and the cutter ring is detachably connected with the cutter hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044051.9A CN114483071A (en) | 2022-01-14 | 2022-01-14 | Back-loading type hob system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044051.9A CN114483071A (en) | 2022-01-14 | 2022-01-14 | Back-loading type hob system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114483071A true CN114483071A (en) | 2022-05-13 |
Family
ID=81512101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210044051.9A Pending CN114483071A (en) | 2022-01-14 | 2022-01-14 | Back-loading type hob system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114483071A (en) |
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2022
- 2022-01-14 CN CN202210044051.9A patent/CN114483071A/en active Pending
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