CN110725692A - Telescopic center cutting knife device of shield tunneling machine - Google Patents
Telescopic center cutting knife device of shield tunneling machine Download PDFInfo
- Publication number
- CN110725692A CN110725692A CN201911154701.XA CN201911154701A CN110725692A CN 110725692 A CN110725692 A CN 110725692A CN 201911154701 A CN201911154701 A CN 201911154701A CN 110725692 A CN110725692 A CN 110725692A
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- Prior art keywords
- cutting tool
- central
- central cutting
- cutter
- cutter head
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- 238000005520 cutting process Methods 0.000 title claims abstract description 164
- 230000005641 tunneling Effects 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 abstract description 10
- 238000009412 basement excavation Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D9/0874—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 rotary drilling heads having variable diameter
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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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a telescopic central cutter device of a shield machine, which comprises a rotary shield machine cutter head; the shield tunneling machine cutter head is provided with a plurality of central cutting tools, each central cutting tool is provided with a cutter head, and each central cutting tool stretches in a direction perpendicular to the shield tunneling machine cutter head. The invention has the beneficial effects that: a central cutting tool which can stretch in the direction vertical to a cutter head of the shield tunneling machine is adopted, and backup is set for the central cutting tool; when the central cutting tool is damaged during tunneling construction, starting a spare cutting tool to ensure that the central cutting tool of the excavation face is normally constructed according to a trajectory line; meanwhile, when the shield machine passes through the complex cross section of the soft and hard stratum, the protection of the central cutting tool can be realized. The strip-shaped center cutting tool with a plurality of tool bits is adopted, so that the tools with the same cutting track can be simultaneously stretched, and the stretching operation and control are optimized; the strip-shaped center cutting tool is driven from two ends by adopting a dual-driving device, so that the center cutting tool can be effectively extended to a cutting position.
Description
Technical Field
The invention belongs to a cutter head device of a shield tunneling machine, and particularly relates to a telescopic central cutting cutter device of the shield tunneling machine.
Background
Shield machines (or called shield tunneling machines) are mainly classified into slurry water balanced shield machines and earth pressure balanced shield machines according to their working principles. According to engineering characteristics and stratum conditions, a shield tunneling machine cutter head needs to optimize the structure, ensure the type and quantity configuration of cutters and ensure the matching with engineering geological conditions. The cutter head cutter configuration mainly comprises the types of scrapers, center cutters, advance cutters, protective cutters, cutting cutters, hobbing cutters and the like. Wherein, the working principle of the cutting knife is as follows: when the shield tunneling machine is pushed forwards, axial (along the advancing direction of the tunnel) shearing force and radial (along the rotating tangential direction of the cutter head) cutting force are generated on the soil body of the excavation surface along with the rotation of the cutter head, and the soil body in front of the excavation surface is cut off continuously. The cutting knife is generally suitable for loose stratum with the particle size of less than 400mm, such as sand pebbles, sandy soil, clay and the like. Under the condition of complex geology, a cutter head cutter of the shield machine is configured according to geological conditions, so that the shield machine can be smoothly constructed under the complex working condition modes of soft soil and hard rock.
The shield machine has long excavation distance and high incision pressure, excavation construction is carried out under the condition of complex stratum conditions, once the cutter is worn and damaged, the problem is generally solved by a cutter changing mode, and the cutter is generally replaced in a working cabin at the rear part of the cutter head in order to ensure the stability of a tunnel face during cutter changing construction. The central structure of the cutter head is connected with the rotary joint, the operation space of a central cutter is limited, cutter changing operation is usually inconvenient to implement, but if the worn central cutting cutter cannot be replaced in time, the cutter head structure can be worn, and the shield machine cannot be constructed normally in serious cases.
Disclosure of Invention
The invention aims to provide a technical scheme of a telescopic central cutting tool device of a shield machine, which realizes backup operation of the central cutting tool of the shield machine and improves the operation reliability of the shield machine.
In order to achieve the purpose, the technical scheme of the invention is as follows: a telescopic central cutter device of a shield machine comprises a rotary shield machine cutter head; the shield machine cutter head is provided with a plurality of central cutting tools, each central cutting tool is provided with a cutter head, and each central cutting tool stretches in a direction perpendicular to the shield machine cutter head.
Furthermore, in order to ensure the construction reliability of the shield tunneling machine, not less than two central cutting tools with the same cutting track of each type of cutter head are provided.
Still further, the center cutting tool includes a first center cutting tool, a second center cutting tool, a third center cutting tool, and a fourth center cutting tool, the first center cutting tool and the second center cutting tool rotate along a first cutting track, the third center cutting tool and the fourth center cutting tool rotate along a second cutting track, and the first cutting track and the second cutting track are distributed in a staggered manner in a circumferential direction.
Furthermore, in order to realize the extension and retraction of the central cutting tool, the central cutting tool is a strip-shaped central cutting tool, a plurality of tool bits are arranged on the strip-shaped central cutting tool along the length direction, each strip-shaped central cutting tool is driven by two driving devices, and the two driving devices respectively drive the central cutting tool to move through driving arms at two ends of the strip-shaped central cutting tool.
Furthermore, in order to ensure that the central cutting tool can be uniformly and stably extended and retracted, the driving device is a hydraulic driving device, and the driving device is provided with a flow regulating valve for controlling the movement speed of the driving arm.
The invention has the beneficial effects that: a central cutting tool which can stretch in the direction vertical to a cutter head of the shield tunneling machine is adopted, and backup is set for the central cutting tool; when the central cutting tool is damaged during tunneling construction, starting a spare cutting tool to ensure that the central cutting tool of the excavation face is normally constructed according to a trajectory line; meanwhile, when the shield machine passes through the complex cross section of the soft and hard stratum, the protection of the central cutting tool can be realized. The strip-shaped center cutting tool with a plurality of tool bits is adopted, so that the tools with the same cutting track can be simultaneously stretched, and the stretching operation and control are optimized; the strip-shaped center cutting tool is driven from two ends by adopting a dual-driving device, so that the center cutting tool can be effectively extended to a cutting position.
The invention is described in detail below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic diagram of the cutter distribution of a shield tunneling machine cutterhead of the present invention;
FIG. 2 is a schematic sectional view of a cutter head of the shield tunneling machine of the present invention, taken along the line A-A of FIG. 1;
FIG. 3 is a schematic view of the distribution of the center cutting tools of the present invention on the shield cutter head;
FIG. 4 is a view showing a construction of the installation of the center cutting tool of the present invention on a cutter head, as viewed from the front side of the cutter head of a shield machine;
FIG. 5 is a view showing a construction of the installation of the center cutting tool of the present invention on a cutter head, as viewed from the rear side of the cutter head of a shield machine;
FIG. 6 is a cross-sectional view of the mounting arrangement of the center cutting tool of the present invention on the cutter head with the center cutting tool in a retracted position;
FIG. 7 is a cross-sectional view of the mounting arrangement of the center cutting tool of the present invention on the cutter head with the center cutting tool in an extended position;
fig. 8 is a schematic diagram of the hydraulic drive system of the present invention.
Detailed Description
Referring to fig. 1 to 8, a telescopic central cutter assembly for a shield tunneling machine includes a rotary shield tunneling machine cutter head 10; the shield tunneling machine cutter head is provided with a plurality of central cutting tools (such as 2a, 2b, 2c and 2 d), each central cutting tool is provided with a cutter head 21, and the central cutting tools stretch in the direction perpendicular to the shield tunneling machine cutter head.
There are no less than two central cutting tools (2 a and 2b, or 2c and 2d in fig. 3) for each of the tips having the same cutting path.
The center cutting tools include a first center cutting tool 2a, a second center cutting tool 2b, a third center cutting tool 2c, and a fourth center cutting tool 2d, the first center cutting tool and the second center cutting tool rotate along a first cutting track R1, the third center cutting tool and the fourth center cutting tool rotate along a second cutting track R2, and the first cutting track and the second cutting track are distributed in a staggered manner in a circumferential direction.
The central cutting tool is a strip-shaped central cutting tool, a plurality of tool bits are arranged on the strip-shaped central cutting tool along the length direction, each strip-shaped central cutting tool is driven by two driving devices 30, and the two driving devices respectively drive the central cutting tool to move at two ends of the strip-shaped central cutting tool through driving arms (3A, 3B).
The first embodiment is as follows:
referring to fig. 1 to 8, a telescopic central cutter device for a shield machine comprises a rotary shield machine cutter head 10, wherein the diameter of the shield machine cutter head is 15 m.
The shield tunneling machine cutter head is provided with a plurality of cutting tools, wherein the cutting tools comprise four central cutting tools, namely a first central cutting tool 2a, a second central cutting tool 2b, a third central cutting tool 2c and a fourth central cutting tool 2 d. The four center cutters are identical in structure, and as shown in fig. 3, each center cutter is a strip-shaped center cutter, three cutting heads 21 are arranged in each strip-shaped center cutter along the length direction, the width K1=200mm of each cutting head, and the distance K2=190mm between the cutting heads. The central cutting tool is arranged in the tool box 11 and moves in a telescopic way along the direction vertical to the cutter head of the shield tunneling machine, and the tool bit extends out of the end surface of the cutter head of the shield tunneling machine.
The cutter head forms a circumferential cutting track when rotating along with the cutter head of the shield tunneling machine. The four central cutting tools are divided into two mounting positions along the radial direction of the cutter head of the shield tunneling machine, and the mounting positions of every two central cutting tools are the same, namely, the central cutting tools with the same cutting track on each cutter head are divided into two central cutting tools. The first and second center cutters 2a and 2b rotate along a first cutting path R1, and the third and fourth center cutters 2c and 2d rotate along a second cutting path R2, which are alternately arranged in the circumferential direction to form a complete cutting circle. The cutting radius range of the cutter heads of the first center cutting tool and the second center cutting tool is r1=775 mm-r 2=1735 mm; the cutting radius of the cutting head of the third and fourth central cutting tools ranges from r3=560mm to r4=1540 mm. After the four central cutting tools are combined, cutting is carried out in a circumference with the radius of 560 mm-1735 mm.
Each central cutting tool is capable of extending and retracting in a direction perpendicular to the cutterhead of the shield machine (i.e., the forward direction of the shield machine). When the shield machine is constructed, one of every two central cutting tools with the same installation position is in a cutting working state, and the other one is in a standby state. The center cutting tool in the cutting operation state is extended, and the center cutting tool in the standby state is retracted. The telescopic stroke of the central cutting tool is 80 mm.
The central cutting tool is driven by the driving device to realize telescopic operation, and three tool bits can be subjected to different resistances in the extending process of the central cutting tool, so that the thrust of a single action point cannot ensure that the three tool bits extend out in a balanced displacement manner, and the central cutting tool can be blocked in an inclined manner in severe cases. Thus, each central cutting tool is driven by two drive means 30, which drive the central cutting tool to move at both ends of the strip-shaped central cutting tool by means of drive arms (3A, 3B), respectively. The drive arm is articulated to the central cutting tool by a pin 31.
As shown in fig. 8, the driving means of the present embodiment is a hydraulic driving means including two hydraulic cylinders 52 for each center cutting blade, and the hydraulic cylinders are mounted on the blade case. One hydraulic cylinder drives the drive arm 3A and the other hydraulic cylinder drives the drive arm 3B. There are eight hydraulic cylinders for driving four central cutting tools.
The hydraulic system of the present embodiment includes a hydraulic pump 53, a flow rate regulating valve 51, a flow meter 54, and a selector valve 55. Because the telescopic operation of the center cutting tool needs to be completed in the rotation state of the cutter head of the shield tunneling machine, the input and output pipelines of the hydraulic cylinder are connected with the reversing valve through the rotary joint 56. A flow regulating valve 51 in the drive controls the drive arm movement speed.
In the embodiment, the running tracks of a plurality of central cutting tools are reasonably set through the configuration of the central cutting tools on the cutter head of the shield tunneling machine, and a plurality of cutting tools are distributed on the same cutting track of the central cutting tools. When the central cutting tool is damaged during tunneling construction, the spare cutting tool is used, and normal construction of the cutting tool of the excavation face according to the trajectory line is ensured. Meanwhile, when the shield tunneling machine passes through the complex cross section of the soft and hard stratum, the protection of a cutter head cutting tool can be realized, the cutter head hobbing cutter construction under the hard rock working condition is started, and the hobbing cutter is utilized to crush the rock.
Claims (5)
1. A telescopic central cutter device of a shield machine comprises a rotary shield machine cutter head; the shield tunneling machine cutter head is characterized in that a plurality of central cutting tools are arranged on the shield tunneling machine cutter head, each central cutting tool is provided with a cutter head, and each central cutting tool stretches in a direction perpendicular to the shield tunneling machine cutter head.
2. The telescopic central cutting blade assembly of a shield tunneling machine of claim 1, wherein there are not less than two central cutting blades each having the same cutting path for each of said cutter heads.
3. The telescopic shield tunneling machine center cutter assembly according to claim 2, wherein the center cutters include a first center cutter, a second center cutter, a third center cutter, and a fourth center cutter, the first center cutter and the second center cutter rotate along a first cutting path, the third center cutter and the fourth center cutter rotate along a second cutting path, and the first cutting path and the second cutting path are circumferentially staggered.
4. The telescopic central cutting blade device of a shield tunneling machine according to claim 1, wherein the central cutting blade is a strip-shaped central cutting blade, a plurality of the cutter heads are arranged on the strip-shaped central cutting blade along a length direction, and each strip-shaped central cutting blade is driven by two driving devices, and the two driving devices respectively drive the central cutting blade to move at two ends of the strip-shaped central cutting blade through driving arms.
5. The telescopic central cutting blade assembly of claim 4, wherein the drive assembly is a hydraulic drive assembly having a flow control valve for controlling the speed of movement of the drive arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154701.XA CN110725692A (en) | 2019-11-22 | 2019-11-22 | Telescopic center cutting knife device of shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154701.XA CN110725692A (en) | 2019-11-22 | 2019-11-22 | Telescopic center cutting knife device of shield tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110725692A true CN110725692A (en) | 2020-01-24 |
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ID=69224683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911154701.XA Pending CN110725692A (en) | 2019-11-22 | 2019-11-22 | Telescopic center cutting knife device of shield tunneling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110725692A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033659A (en) * | 2020-09-04 | 2020-12-04 | 盾构及掘进技术国家重点实验室 | Management system and method for shield machine cutter |
| CN113446018A (en) * | 2021-07-30 | 2021-09-28 | 中铁十五局集团有限公司 | Foldable gap-variable cutter head of slurry shield machine and slurry shield machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033659A (en) * | 2020-09-04 | 2020-12-04 | 盾构及掘进技术国家重点实验室 | Management system and method for shield machine cutter |
| CN113446018A (en) * | 2021-07-30 | 2021-09-28 | 中铁十五局集团有限公司 | Foldable gap-variable cutter head of slurry shield machine and slurry shield machine |
| CN113446018B (en) * | 2021-07-30 | 2023-12-05 | 中铁十五局集团有限公司 | Foldable gap-variable cutterhead of slurry shield machine and slurry shield machine |
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Application publication date: 20200124 |