Variable diameter soft soil cutterhead with circumferential ring and full-face tunnel boring machine

Abstract

The present invention relates to the technical field of tunnel engineering, and specifically to a variable diameter soft soil cutterhead with a circumferential ring and a full-face tunnel boring machine, wherein the cutterhead comprises a cutterhead middle component, the cutterhead middle component comprises a center tube, a spoke arm and a first telescopic connection device, the first end of the spoke arm is fixed to the center tube, the second end of the spoke arm is detachably connected to the first telescopic connection device, the center tube is provided with a center knife, the spoke arm is provided with a first cutter assembly; a cutterhead telescopic component, the cutterhead telescopic component is detachably connected to the first telescopic connection device and is located at one end opposite to the spoke arm, the cutterhead telescopic part is provided with a second cutter assembly; a circumferential ring, the circumferential ring is detachably mounted on the cutterhead telescopic component and is located at one end opposite to the spoke arm, the circumferential ring is provided with an annular portion advance knife. The present invention solves the technical problem in the prior art that the cutterhead needs to be irreversibly modified or remanufactured when the diameter of the cutterhead needs to be changed.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering, and in particular to a variable-diameter soft soil cutter head with a circumferential ring and a full-section tunnel boring machine. Background Art

[0002] Tunnel engineering projects have different tunnel diameters and lengths, so each engineering tunnel basically has a cutterhead of one diameter matched to a tunnel of one diameter. If the tunnel boring machine needs to be used in other tunnel projects with different diameters and similar geology, there are usually two solutions: Method 1: irreversibly transform the original cutterhead by cutting, planing, welding, etc.; Method 2: make a new cutterhead. Method 1 is prone to deformation and damage to the original cutterhead structure during the irreversible transformation process, affecting its performance; at the same time, this method can only be transformed after the equipment is out of the hole, which may lead to the situation where the construction period cannot be connected; Method 2 results in the shelving of the old cutterhead, resulting in waste of resources and increased operating costs.

[0003] In summary, there is an urgent need for a cutter disc capable of changing its diameter to solve the problems existing in the prior art. Summary of the invention

[0004] The object of the present invention is to provide a variable diameter soft soil cutterhead with a circumferential ring and a full-face tunnel boring machine, so as to solve the technical problem in the prior art that the cutterhead needs to be irreversibly modified or remanufactured when the cutterhead diameter needs to be changed. The specific technical solution is as follows:

[0005] The present invention provides a variable-diameter soft soil cutter disc with a circumferential ring, comprising an intermediate component of the cutter disc, the intermediate component of the cutter disc comprising a central tube, a spoke arm and a first telescopic connection device, the first end of the spoke arm being fixed to the central tube, the second end of the spoke arm being detachably connected to the first telescopic connection device, the central tube being provided with a central knife, the spoke arm being provided with a first cutting knife assembly; a telescopic component of the cutter disc, the telescopic component of the cutter disc being detachably connected to the first telescopic connection device and being located at an end opposite to the spoke arm, the telescopic part of the cutter disc being provided with a second cutting knife assembly; a circumferential ring, the circumferential ring being detachably mounted on the telescopic component of the cutter disc and being located at an end opposite to the spoke arm, the circumferential ring being provided with an annular portion leading knife.

[0006] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that the number of the radial arms is at least two, and a first annular rib plate is fixed between two adjacent radial arms.

[0007] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that a panel box is fixed on the first annular rib plate, and a third cutter assembly is provided on the panel box. When the first telescopic connection device is not installed, the cutting trajectory of the third cutter assembly coincides with the cutting trajectory of the second cutter assembly, and a second annular rib plate is fixed between the panel box and the radial arm.

[0008] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that a second telescopic connection device is fixed to one end of the panel box away from the central tube, and one end of the second telescopic connection device away from the panel box is detachably connected to the circumferential ring.

[0009] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that a force transmission hole for detachably connecting the second telescopic connecting device is provided on the circumferential ring.

[0010] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that the first telescopic connection device includes a radial adjustment block, a connecting rod and a step pin, the connecting rod passes through the radial adjustment block and is connected to the cutter disc telescopic component, the radial adjustment block is located inside the radial arm, and the step pin passes through the radial arm and is connected to the radial adjustment block.

[0011] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that a supporting groove for detachably connecting the telescopic component of the cutter disc is provided on the circumferential ring.

[0012] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that the first cutting knife assembly includes a first middle portion leading knife and a first middle portion cutting knife, the first middle portion leading knife is arranged at the front position of the radial arm, and the first middle portion cutting knife is arranged at the two sides of the radial arm.

[0013] A further improvement of the variable diameter soft soil cutter disc with a circumferential ring of the present invention is that the second cutting knife assembly includes a telescopic part leading knife and a telescopic part cutting knife, the telescopic part leading knife is arranged at the front position of the telescopic part of the cutter disc, and the telescopic part cutting knife is arranged at the two sides of the telescopic part of the cutter disc.

[0014] The present invention also provides a full-face tunnel boring machine, comprising the variable-diameter soft soil cutterhead with a circumferential ring as described above.

[0015] The application of the technical solution of the present invention has the following beneficial effects:

[0016] The variable diameter soft soil cutter disc with a circumferential ring of the present invention can realize the need for diameter change of the cutter disc by installing circumferential rings of different diameters in cooperation with first telescopic connecting devices of different lengths, thereby solving the technical problem in the prior art that the cutter disc needs to be irreversibly modified or remanufactured when the diameter of the cutter disc needs to be changed. The outer end area of ​​the cutter disc center component of the present invention overlaps as much as possible with the tool trajectory on the cutter disc telescopic component to meet the full cross-section coverage of the tool after the diameter is changed; according to the different diameters of the target project, matching circumferential rings can be prepared in advance, saving equipment modification time and realizing rapid response to project requirements; the circumferential ring and the cutter disc center component and the cutter disc telescopic component are connected in an assembly form to realize rapid disassembly, assembly and replacement, and effectively protect the cutter disc structure and the irreversible effects caused by the cutter disc.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a front view of the variable diameter soft soil cutter head with a circumferential ring of the present invention when both the first telescopic connecting device and the second telescopic connecting device are not installed;

[0020] Figure 2 is a front view of the variable diameter soft soil cutter head with a circumferential ring of the present invention when the first telescopic connecting device and the second telescopic connecting device are both installed;

[0021] Figure 3 It is a schematic diagram of the cutting trajectory of the third cutter assembly of the variable diameter soft soil cutter disc with a circumferential ring of the present invention;

[0022] Figure 4 yes Figure 3 Sectional view along CC line;

[0023] Figure 5 yes Figure 4 Mid-DD line section view;

[0024] Figure 6 It is a front view of the circumferential ring of the variable diameter soft soil cutter disc with circumferential ring of the present invention;

[0025] Figure 7 yes Figure 6 A-line cross-sectional view;

[0026] Figure 8 yes Figure 6 Middle B-line cross-sectional view.

[0027] Among them, 1. the middle part of the cutter disc; 11. the center tube; 12. the spoke arm; 13. the panel box; 14. the second annular rib plate; 15. the first telescopic connection device; 151. the radial adjustment block; 152. the connecting rod; 153. the step pin; 154. the locking piece; 16. the center knife; 17. the first middle part leading knife; 18. the third middle part cutting knife; 19. the second telescopic connection device; 2. the telescopic part of the cutter disc; 21. the leading knife of the telescopic part; 22. the cutting knife of the telescopic part; 3. the circumferential ring; 31. the leading knife of the annular part; 32. the supporting groove; 33. the force transmission hole. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1 to Figure 8 As shown, a variable diameter soft soil cutter disc with a circumferential ring comprises a cutter disc middle component 1, the cutter disc middle component 1 comprises a center tube 11, a spoke arm 12 and a first telescopic connecting device 15, the first end of the spoke arm 12 is fixed to the center tube 11, the second end of the spoke arm 12 is detachably connected to the first telescopic connecting device 15, the center tube 11 is provided with a center knife 16, the spoke arm 12 is provided with a first cutting knife assembly; a cutter disc telescopic component 2, the cutter disc telescopic component 2 is detachably connected to the first telescopic connecting device 15 and is located at an end opposite to the spoke arm 12, and a second cutting knife assembly is provided on the cutter disc telescopic part; a circumferential ring 3, the circumferential ring 3 is detachably mounted on the cutter disc telescopic component 2 and is located at an end opposite to the spoke arm 12, and a ring-shaped leading knife 31 is provided on the circumferential ring 3.

[0030] Specifically, the central tube 11 is circular, and the cutter disc middle part 1 is connected to the spoke arm 12 through the central tube 11 to form an integral structure. There are multiple annular part leading knives 31, and multiple annular part leading knives 31 are arranged at intervals along the circumferential direction of the circumferential ring 3. The annular part leading knives 31 are used to ensure the excavation diameter of the cutter disc. The variable diameter cutter disc provided by the present invention is applied, and according to the change of diameter, circumferential rings 3 of different diameters matching the cutter disc diameter are prepared in advance, and connected to the cutter disc middle part 1 and the cutter disc telescopic part 2 through the telescopic connection device, so as to quickly complete the expansion of the cutter disc.

[0031] Preferably, the number of the radial arms 12 is at least two, and a first annular rib is fixed between two adjacent radial arms 12. The number of radial arms 12 and the panel box 13 can be changed in a targeted manner according to geological conditions, etc. In this embodiment, the number of the radial arms 12 is three, and the three radial arms 12 are fixed to the outer periphery of the central tube 11 in a divergent shape, and the first annular rib is fixed to the outer periphery of the central tube 11, thereby improving the strength and stability of the cutter head.

[0032] Preferably, Figure 3As shown, a panel box 13 is fixed on the first annular rib plate, and a third cutter assembly is provided on the panel box 13. When the first telescopic connection device 15 is not installed, the cutting track of the third cutter assembly coincides with the cutting track of the second cutter assembly. A second annular rib plate 14 is fixed between the panel box 13 and the spoke arm 12. The structure of the third cutter assembly is the same as that of the first cutter assembly, including a third middle part leading knife and a third middle part cutter 18. The third middle part leading knife is arranged at the front position of the spoke arm 12, and the third middle part cutter 18 is arranged at the two sides of the spoke arm 12. The number of the second annular rib plates 14 is at least one, and the number can be adjusted according to the diameter of the knife disc and the structural strength requirements. The panel box 13 is fan-shaped. When the first telescopic connection device 15 is not installed, the cutter disc telescopic component 2 is in the shortest state, and the tool trajectories arranged radially on the outside of the cutter disc middle component 1 and the panel box 13 coincide as much as possible with the trajectories of the telescopic leading knife 21 and the telescopic cutting knife 22 on the cutter disc telescopic component 2. This allows the cutter disc telescopic component 2 to extend and still cover the entire cross-section of the tool, thereby ensuring that the cutter disc can still achieve a full cross-section cutting effect after the diameter of the cutter disc is expanded.

[0033] Preferably, Figure 2 As shown, a second telescopic connection device 19 is fixed to one end of the panel box 13 away from the central tube 11, and one end of the second telescopic connection device 19 away from the panel box 13 is detachably connected to the circumferential ring 3. By connecting the second telescopic connection device 19 to the circumferential ring 3, the circumferential ring 3 can be installed more stably.

[0034] Preferably, Figure 6 and Figure 8 As shown, the circumferential ring 3 is provided with a force transmission hole 33 for detachably connecting the second telescopic connection device 19. Specifically, the extended end of the second telescopic connection device 19 is inserted into the force transmission hole 33 to connect with the circumferential ring 3, thereby transmitting torque and thrust to the circumferential ring 3.

[0035] Preferably, Figure 3~Figure 5As shown, the first telescopic connection device 15 includes a radial adjustment block 151, a connecting rod 152 and a step pin 153. The connecting rod 152 passes through the radial adjustment block 151 and is connected to the cutter disc telescopic component 2. The radial adjustment block 151 is located inside the radial arm 12. The step pin 153 passes through the radial arm 12 and is connected to the radial adjustment block 151. The connecting rod 152 can be a screw rod. A threaded through hole for the connecting rod 152 to be screwed is provided in the radial adjustment block 151. A threaded hole for the connecting rod 152 to be screwed is provided on the cutter disc telescopic component 2. The first telescopic connection device 15 is telescopically extended by replacing radial adjustment blocks 151 of different lengths, thereby changing the outer diameter of the entire cutter disc. Furthermore, the outer periphery of the step pin 153 is provided with a thread, so that a locking member 154 is fastened and screwed on the outer periphery of the step pin 153 through the thread to improve the stability of the connection between the radial adjustment block 151 and the radial arm 12, and a threaded hole for the step pin 153 to be screwed is provided on the radial adjustment block 151. The number of the step pin 153 and the locking member 154 is at least two, and they are installed one by one. The structural composition of the second telescopic connection device 19 is the same as that of the first telescopic connection device 15. The difference from the first telescopic connection device 15 is that the radial adjustment block 151 of the first telescopic connection device 15 is detachably connected to the force transmission hole 33, thereby realizing the connection and force transmission between the panel box 13 and the circumferential ring 3. Compared with the drive parts such as oil cylinders and air cylinders, the telescopic structure of the first telescopic connection device 15 and the second telescopic connection device 19 of the present invention is smaller in size and more suitable for the expansion operation of a small diameter cutter disc. At the same time, it occupies a small installation space of the cutter disc, and the load increase on the cutter disc itself is not obvious, so as not to affect the service life of the cutter disc itself. When the first telescopic connection device 15 is installed outside the hole, the connecting rod 152 is first screwed through the radial adjustment block 151 and screwed to the cutter disc telescopic component 2, so that the radial adjustment block 151 and the cutter disc telescopic component 2 are connected as a whole, and then the end of the radial adjustment block 151 away from the cutter disc telescopic component 2 is inserted into the radial arm 12, and the step pin 153 passes through the side arm of the radial arm 12 and is screwed on the radial adjustment block 151, so that the radial adjustment block 151 and the cutter disc telescopic component 2 are simultaneously connected to the radial arm 12. The installation operation is fast and convenient, and the force transmission in the hole is stable and reliable, especially for the diameter change of small-diameter cutter discs, which is less restricted by the structural size of the diameter change device.

[0036] Preferably, Figure 6 and Figure 7 As shown, the circumferential ring 3 is provided with a support groove 32 for detachably connecting the cutter head telescopic component 2. Specifically, the cutter head telescopic component 2 can be extended to the support groove 32 and supported by the support groove 32 to ensure the structural strength of the telescopic component and prevent the structure from being damaged due to excessive cantilever or local force on the periphery during excavation, causing serious consequences.

[0037] Preferably, Figure 1As shown, the first cutter assembly includes a first middle portion leading knife 17 and a first middle portion cutter, the first middle portion leading knife 17 is arranged at the front position of the spoke arm 12, and the first middle portion cutter is arranged at both sides of the spoke arm 12. In this embodiment, the number of the first middle portion cutter is one, which is located in the middle position of the spoke arm 12, and the number of the first middle portion cutters is four, which are respectively located in pairs at the two side regions of the spoke arm 12.

[0038] Preferably, the second cutter assembly includes a telescopic leading knife 21 and a telescopic cutting knife 22, wherein the telescopic leading knife 21 is arranged at the front position of the cutter disc telescopic component 2, and the telescopic cutting knife 22 is arranged at both sides of the cutter disc telescopic component 2. In this embodiment, the number of the telescopic leading knife 21 is one, which is located in the middle position of the cutter disc telescopic component 2, and the number of the telescopic cutting knife 22 is four, which are respectively located in pairs at the two side areas of the cutter disc telescopic component 2.

[0039] The present invention also provides a full-face tunnel boring machine, comprising the variable-diameter soft soil cutterhead with a circumferential ring as described above, so as to adapt to the excavation construction of tunnels with different diameters.

[0040] The variable diameter soft soil cutter disc with a circumferential ring of the present invention can realize the need for diameter change of the cutter disc by installing circumferential rings 3 of different diameters in cooperation with first telescopic connecting devices 15 of different lengths, thus solving the technical problem in the prior art that the cutter disc needs to be irreversibly modified or remanufactured when the diameter of the cutter disc needs to be changed. The outer end area of ​​the cutter disc center component of the present invention overlaps as much as possible with the tool trajectory on the cutter disc telescopic component 2 to meet the full cross-section coverage of the tool after the diameter change; according to the different diameters of the target project, a matching circumferential ring 3 can be prepared in advance, saving equipment modification time and realizing rapid response to project requirements; the circumferential ring 3 and the cutter disc center component and the cutter disc telescopic component 2 are connected in an assembly form to realize rapid disassembly, assembly and replacement, and effectively protect the cutter disc structure and the irreversible effects caused by the cutter disc.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable diameter soft soil cutter disc with a circumferential ring, characterized in that: The invention comprises a cutter disc middle component (1), wherein the cutter disc middle component (1) comprises a center tube (11), a radial arm (12) and a first telescopic connection device (15), wherein the first end of the radial arm (12) is fixed to the center tube (11), and the second end of the radial arm (12) is detachably connected to the first telescopic connection device (15), wherein the center tube (11) is provided with a center knife (16), and the radial arm (12) is provided with a first cutting knife assembly; the first telescopic connection device (15) comprises a radial adjustment block (151), a connecting rod (152) and a step pin (153), wherein the connecting rod (152) passes through the radial adjustment block (151) and is connected to the cutter disc telescopic component (2), wherein the radial adjustment block (151) is located inside the radial arm (12), and the step pin (153) passes through the radial arm (12) and is connected to the radial adjustment block (151); a knife disc telescopic component (2), the knife disc telescopic component (2) being detachably connected to the first telescopic connection device (15) and being located at an end opposite to the spoke arm (12), and a second cutter assembly being provided on the knife disc telescopic portion; A circumferential ring (3) is detachably mounted on the cutter disc telescopic component (2) and is located at an end opposite to the radial arm (12). An annular leading cutter (31) is provided on the circumferential ring (3).

2. The variable diameter soft soil cutter disc with a circumferential ring according to claim 1, characterized in that: The number of the radial arms (12) is at least two, and a first annular rib plate is fixed between two adjacent radial arms (12).

3. The variable diameter soft soil cutter disc with a circumferential ring according to claim 2, characterized in that: A panel box (13) is fixed on the first annular rib plate, and a third cutter assembly is provided on the panel box (13); when the first telescopic connection device (15) is not installed, the cutting trajectory of the third cutter assembly coincides with the cutting trajectory of the second cutter assembly; and a second annular rib plate (14) is fixed between the panel box (13) and the radial arm (12).

4. The variable diameter soft soil cutter disc with a circumferential ring according to claim 3, characterized in that: A second telescopic connection device (19) is fixed to one end of the panel box (13) away from the central tube (11), and one end of the second telescopic connection device (19) away from the panel box (13) is detachably connected to the circumferential ring (3).

5. The variable diameter soft soil cutter disc with a circumferential ring according to claim 4, characterized in that: The circumferential ring (3) is provided with a force transmission hole (33) for detachably connecting the second telescopic connection device (19).

6. The variable diameter soft soil cutter disc with a circumferential ring according to claim 1, characterized in that: The circumferential ring (3) is provided with a support groove (32) for detachably connecting the cutter disc telescopic component (2).

7. The variable diameter soft soil cutter disc with a circumferential ring according to claim 1, characterized in that: The first cutting knife assembly comprises a first middle portion leading knife (17) and a first middle portion cutting knife, wherein the first middle portion leading knife (17) is arranged at the front position of the radial arm (12), and the first middle portion cutting knife is arranged at the two side positions of the radial arm (12).

8. The variable diameter soft soil cutter disc with a circumferential ring according to claim 1, characterized in that: The second cutting knife assembly comprises a telescopic leading knife (21) and a telescopic cutting knife (22); the telescopic leading knife (21) is arranged at the front position of the telescopic part of the knife disc (2); and the telescopic cutting knife (22) is arranged at the two side positions of the telescopic part of the knife disc (2).

9. A full-face tunnel boring machine, characterized in that: It comprises the variable diameter soft soil cutter disc with a circumferential ring as claimed in claim 1.

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