CN117294110B

CN117294110B - Superconducting coil driving mechanism, heading machine cutterhead and hard rock tunnel heading machine

Info

Publication number: CN117294110B
Application number: CN202311573772.XA
Authority: CN
Inventors: 杨军; 李喆; 刘伟超; 边文辉; 王科学; 董美强; 何肖辉; 方毅; 郝清硕; 翟兆玺
Original assignee: Beijing Guoanchor Engineering Technology Research Institute Co ltd; China University of Mining and Technology Beijing CUMTB
Current assignee: Beijing Guoanchor Engineering Technology Research Institute Co ltd; China University of Mining and Technology Beijing CUMTB
Priority date: 2023-11-23
Filing date: 2023-11-23
Publication date: 2024-02-27
Anticipated expiration: 2043-11-23
Also published as: CN117294110A

Abstract

The application relates to the technical field of tunnel construction, concretely relates to superconducting coil actuating mechanism, entry driving machine blade disc and hard rock tunnel boring machine, wherein, superconducting coil actuating mechanism includes: the driving assembly comprises a first annular panel, a plurality of driving coils and a fixed shaft body; the rotating assembly comprises a second annular panel, a plurality of induction coils and a bearing; the drive coil and/or the induction coil are made of superconducting materials. The superconducting material is adopted, the magnetic field can be directly generated by adopting electric power to drive the cutterhead, so that the secondary force action conversion is avoided, the energy conversion times are reduced, the effect of being applied to the main body cutting of the cutterhead is better, the running resistance of the circuit is extremely low, the heating loss is small, and the utilization rate of electric energy is high. The energy conversion device effectively solves the problems that in the prior art, the energy action efficiency of the driving cutterhead is low and the rock breaking efficiency is influenced due to the fact that multistage energy conversion is needed to be carried out on the cutterhead of the heading machine.

Description

Superconducting coil driving mechanism, heading machine cutterhead and hard rock tunnel heading machine

Technical Field

The application relates to the technical field of hard rock cutting, in particular to a superconducting coil driving mechanism, a heading machine cutterhead and a hard rock tunnel heading machine.

Background

In recent years, tunnels gradually develop to a long, large and deep direction rapidly, various hard rocks are inevitably encountered in the process of excavation, and the difficulty of tunnel construction is continuously increased. In the process of rock tunnel excavation, the full-face hard rock tunneling machine excavation is used as a non-blasting mechanical method and is widely applied to railway, highway and underground passage construction. A full-face hard rock tunneling machine utilizes a hob on a rotary cutterhead to extrude, shear and break rock so as to achieve the aim of tunneling.

In the prior art, the cutterhead is usually driven by kinetic energy provided by a hydraulic oil cylinder or a driving motor, and in a hydraulic oil cylinder driving mode, a hydraulic system firstly converts electric energy into hydraulic energy and then converts the hydraulic energy into mechanical energy to drive the cutterhead to rotate. The transmission efficiency is low, the energy loss is large, the working noise is large, and meanwhile, the surrounding rock-soil body environment can be polluted due to hydraulic oil leakage. In the motor driving mode, the driving motor is required to be firstly decelerated through the speed reducer and then connected with a plurality of sets of gears with different sizes through the safety connecting shaft to drive the cutterhead to rotate, so that the mechanical structure is complex, and the maintenance and operation cost is high. The driving of the cutterhead in any mode can involve multiple energy conversion, is limited by energy loss necessarily brought by the energy conversion, so that the energy input for driving the cutterhead is far greater than the actual effect, and the rock breaking efficiency is reduced under the background that the surrounding rock grade is increased and the rotation resistance of the cutterhead is increased.

Disclosure of Invention

The application provides a superconducting coil actuating mechanism, entry driving machine blade disc and hard rock tunnel boring machine to solve entry driving machine blade disc among the prior art and adopt hydraulic pressure or motor cooperation reduction gear to drive, need carry out multistage energy conversion, lead to the energy efficiency of drive blade disc lower, influence the problem of broken rock efficiency.

In a first aspect, an embodiment of the present application provides a superconducting coil driving mechanism for driving a cutterhead of a heading machine, including: the driving assembly comprises a first annular panel, a plurality of driving coils and a fixed shaft body, wherein the driving coils are uniformly arranged around the axis of the first annular panel, the fixed shaft body is fixedly connected to one side of the first annular panel, on which the driving coils are arranged, and the axis of the fixed shaft body coincides with the axis of the first annular panel; the rotating assembly comprises a second annular panel, a plurality of induction coils and bearings, wherein the induction coils and the driving coils are arranged in one-to-one correspondence, the induction coils are uniformly arranged on one side of the second annular panel facing the first annular panel around the axis of the second annular panel, the outer ring of the bearings is fixedly connected with the second annular panel, the inner ring of the bearings is fixedly connected with the fixed shaft body, and the cutterhead main body of the cutterhead of the heading machine is arranged on one side of the second annular panel, which is away from the first annular panel; the driving coil and/or the induction coil are/is made of superconducting materials.

According to some embodiments of the present application, the induction coil is made of superconducting material, the rotating assembly includes a first protective housing and a cooling structure, the first protective housing and the second annular panel form an accommodation space of the induction coil, and the cooling structure conveys a cooling medium to the accommodation space.

According to some embodiments of the present application, the cooling structure includes a cooling pump body, a cooling medium storage tank and a transmission pipeline, an output end of the cooling pump body is communicated with the accommodating space through the transmission pipeline, and an input end of the cooling pump body is communicated with the cooling medium storage tank.

According to some embodiments of the present application, the rotating assembly is provided with a tank circuit, the induction coil is electrically connected with the tank circuit, and the tank circuit is electrically connected with the driving circuit of the driving assembly or the driving power supply of the superconducting coil driving mechanism.

According to some embodiments of the present application, a plurality of driving power sources corresponding to the driving coils one by one are disposed in the first annular panel, and the driving power sources are electrically connected with the driving circuit of the driving assembly respectively.

According to some embodiments of the application, the driving power supply comprises a power supply anode and a power supply cathode, the driving coil is provided with a first wiring terminal and a second wiring terminal, the power supply anode respectively has lap joint positions with the first wiring terminal and the second wiring terminal, the power supply cathode respectively has lap joint positions with the first wiring terminal and the second wiring terminal, the driving power supply is provided with a fixed seat body, the first annular panel is provided with a rotation seat, the fixed seat body with rotate seat fixed connection, rotate the seat and can rotate relative to the first annular panel.

According to some embodiments of the present application, the driving power supply is provided with a first displacement structure and a second displacement structure, the power supply anode is fixedly connected with the first displacement structure, the first displacement structure is used for enabling the power supply anode to displace relative to the first wiring terminal or the second wiring terminal, the power supply cathode is fixedly connected with the second displacement structure, and the second displacement structure is used for enabling the power supply cathode to displace relative to the first wiring terminal or the second wiring terminal.

According to some embodiments of the present application, each induction coil is provided with a signal transmitter facing one side of the first annular panel, the first annular panel is provided with a signal receiver, and the signal receiver receives a signal transmitted by the signal transmitter so as to detect a real-time position of the induction coil, wherein the signal transmitter is a laser transmitter, and the signal receiver is a laser receiver.

In a second aspect, the application provides a heading machine cutterhead, the heading machine cutterhead includes cutterhead main part and superconducting coil actuating mechanism, superconducting coil actuating mechanism is foretell superconducting coil actuating mechanism, cutterhead main part fixed connection is in the second annular panel of superconducting coil actuating mechanism is kept away from one side of first annular panel.

In a third aspect, the present application provides a hard rock tunnel boring machine comprising a boring machine cutterhead as described above.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the embodiment of the application provides a superconducting coil actuating mechanism, entry driving machine blade disc and hard rock tunnel boring machine, wherein, superconducting coil actuating mechanism for the drive of entry driving machine blade disc, it includes: the driving assembly comprises a first annular panel, a plurality of driving coils and a fixed shaft body, the driving coils are uniformly arranged around the axis of the first annular panel, the fixed shaft body is fixedly connected to one side of the first annular panel, where the driving coils are arranged, and the axis of the fixed shaft body is coincident with the axis of the first annular panel; the rotating assembly comprises a second annular panel, a plurality of induction coils and a bearing, wherein the induction coils and the driving coils are arranged in one-to-one correspondence, the induction coils are uniformly arranged on one side, facing the first annular panel, of the second annular panel around the axis of the second annular panel, the outer ring of the bearing is fixedly connected with the second annular panel, the inner ring of the bearing is fixedly connected with the fixed shaft body, and the cutterhead main body of the cutterhead of the heading machine is arranged on one side, facing away from the first annular panel, of the second annular panel; the drive coil and/or the induction coil are made of superconducting materials. The driving coil and/or the induction coil are/is made of superconducting materials, so that the driving of the cutterhead can be directly performed by adopting electric power to generate a magnetic field, the secondary force action conversion is avoided, on one hand, the energy conversion times are reduced through the arrangement, the energy conversion efficiency is high, the effect of cutting the cutterhead main body is better, on the other hand, the superconducting materials are arranged, the circuit can not generate heat due to the fact that the resistance of the coil is low, namely, the operation loss of electric energy is reduced, and the utilization rate is high. The problem that the energy efficiency of driving the cutterhead is lower, and rock breaking efficiency is influenced because the driving of the cutterhead is achieved through multistage energy conversion due to the fact that the driving of the cutterhead in the prior art is achieved through the fact that the driving of the cutterhead by adopting a hydraulic or motor to be matched with a speed reducer is effectively solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic structural diagram of a superconducting coil driving mechanism according to an embodiment of the present application;

FIG. 2 shows a schematic diagram of the drive assembly of the superconducting coil drive mechanism of FIG. 1;

FIG. 3 is a schematic diagram illustrating the construction of a rotating assembly of the superconducting coil drive mechanism of FIG. 1;

Fig. 4 shows a schematic structural diagram of a hard rock tunneling machine according to an embodiment of the present application;

FIG. 5 shows a schematic view of the hard rock tunnel boring machine of FIG. 4 in use;

FIG. 6 shows a schematic internal structure of the hard rock tunnel boring machine of FIG. 4;

FIG. 7 shows a schematic view of the internal structure of the hard rock tunnel boring machine of FIG. 4 at another angle;

FIG. 8 shows a schematic representation of the propulsion of the hard rock tunnel boring machine of FIG. 4;

fig. 9 is a schematic structural diagram of an assembled integrated duct piece and an assembled duct piece according to an embodiment of the present application;

fig. 10 shows a schematic perspective view of the integrated duct piece of fig. 9;

FIG. 11 illustrates a schematic top view of the internal structure of the integrated duct piece of FIG. 9;

FIG. 12 is a schematic front view of the internal structure of the integrated duct piece of FIG. 9;

FIG. 13 illustrates a schematic bottom view of the integrated duct piece of FIG. 9;

fig. 14 shows a schematic perspective view of the assembled duct piece of fig. 9.

Wherein the above figures include the following reference numerals:

10. a drive assembly; 11. a first annular panel; 111. a rotating seat; 112. a signal receiver; 12. a driving coil; 121. a first connection terminal; 122. a second connection terminal; 13. a fixed shaft body; 14. a driving power supply; 141. a power supply positive electrode; 142. a power supply negative electrode; 143. a fixed seat body; 145. a first displacement structure; 146. a second displacement structure; 15. a second protective housing; 20. a rotating assembly; 21. a second annular panel; 22. an induction coil; 221. a signal transmitter; 23. a bearing; 24. a first protective housing; 25. a cooling structure; 251. cooling the pump body; 252. a cooling medium storage tank; 253. a transmission line; 26. a transmission coil; 30. cutterhead of the heading machine; 31. a cutterhead main body; 40. integrating the tube sheets; 41. a magnetic levitation track structure; 411. a floating coil assembly; 4111. a first floating coil; 4112. a second floating coil; 412. a limit coil set; 4121. a first limit coil; 4122. a second limit coil; 413. a first track; 414. a second track; 416. A driving coil group; 4161. a first driving coil; 4162. a second driving coil; 42. a temperature maintenance structure; 421. a conveying pump body; 422. a refrigerant storage tank; 43. a first electrical interface; 431. a limit clamping block; 432. a first electrical connector; 44. a second electrical interface; 441. a limit clamping groove; 442. a second electrical connector; 45. a segment body; 451. a first locking groove; 452. a first locking block; 46. a duct piece cover; 50. assembling the duct pieces; 51. A second locking groove; 52. a second locking block; 60. a support mechanism; 61. a shield; 62. a shield body bracket; 70. a propulsion mechanism; 71. a thrust cylinder; 80. an assembling mechanism; 81. a grabbing component; 811. a vacuum chuck; 812. an extension arm; 82. a displacement assembly; 90. a main beam; 100. and (5) a working vehicle.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

As shown in fig. 1 to 3, an embodiment of the present application provides a superconducting coil driving mechanism for driving a cutterhead 30 of a heading machine, including: the driving assembly 10 and the rotating assembly 20, the driving assembly 10 comprises a first annular panel 11, a plurality of driving coils 12 and a fixed shaft body 13, the driving coils 12 are uniformly arranged around the axis of the first annular panel 11, the fixed shaft body 13 is fixedly connected to one side of the first annular panel 11 where the driving coils 12 are arranged, and the axis of the fixed shaft body 13 coincides with the axis of the first annular panel 11; the rotating assembly 20 comprises a second annular panel 21, a plurality of induction coils 22 and a bearing 23, wherein the induction coils 22 and the driving coils 12 are arranged in one-to-one correspondence, the induction coils 22 are uniformly arranged on one side of the second annular panel 21 facing the first annular panel 11 around the axis of the second annular panel 21, the outer ring of the bearing 23 is fixedly connected with the second annular panel 21, the inner ring of the bearing 23 is fixedly connected with the fixed shaft body 13, and the cutterhead main body 31 of the tunneller cutterhead 30 is arranged on one side of the second annular panel 21 facing away from the first annular panel 11; the drive coil 12 and/or the induction coil 22 are made of superconducting material.

The driving coil 12 and/or the induction coil 22 are/is made of superconducting materials, so that the driving of the cutterhead main body 31 can be directly performed by adopting electric power to generate a magnetic field, the secondary force action conversion is avoided, on one hand, the energy conversion times are reduced by the arrangement, the energy conversion efficiency is high, the cutting effect of the cutterhead main body 31 is better, on the other hand, the superconducting materials are arranged, the circuit operation cannot be caused by the heating loss of the resistance of the coil, namely, the operation loss of electric energy is reduced, and the utilization rate is higher. The problem that the energy efficiency of driving the cutterhead is lower, and rock breaking efficiency is influenced because the driving of the cutterhead is achieved through multistage energy conversion due to the fact that the driving of the cutterhead in the prior art is achieved through the fact that the driving of the cutterhead by adopting a hydraulic or motor to be matched with a speed reducer is effectively solved. The arrangement of the superconducting material also ensures that the material of the driving coil 12 and/or the induction coil 22 has complete diamagnetism, i.e. the magnetic field inside the material is zero, so that the generated induction magnetic field is more accurate and controllable, the situation that the material influences the generation of the magnetic field can not occur, and the operation of the cutterhead main body 31 is more accurate.

It should be noted that, the driving coils 12 are independent, the induction coils 22 are arranged in series, and winding directions of the adjacent induction coils 22 are opposite, that is, directions of magnetic fields generated by the adjacent induction coils 22 are opposite, so that the driving coils 12 can generate different magnetic fields according to different needs in a driving manner, and the magnetic field arrangement of the induction coils 22 can enable the acting force received by the spaced induction coils 22 to form a ring shape, that is, the acting force received by the cutterhead main body 31 is continuous, and the direction of the acting force is consistent with the cutting direction along the tangential direction of the cutterhead rotating direction, so that no force loss exists, the cutting effect is better, and the energy consumption of cutting can be reduced. The opposite arrangement of the magnetic field direction of the adjacent induction coils 22 also enables the induction coils 22 to be opposite in interaction force of the adjacent induction coils and fixed in size, which is equivalent to the mutual clamping of the induction coils, so that the acting force borne by the induction coils 22 is stable, namely the induction coils 22 are relatively balanced even if the induction coils are stressed in the rotating process, the situation that the positions of the induction coils 22 are fluctuated can not occur, and the cutting action of the heading machine is more accurate.

As shown in fig. 1, in the technical solution of the present embodiment, the induction coil 22 is made of a superconducting material, the rotating assembly 20 includes a first protection housing 24 and a cooling structure 25, the first protection housing 24 and the second annular panel 21 form an accommodating space of the induction coil 22, and the cooling structure 25 conveys a cooling medium to the accommodating space. The induction coil 22 is made of superconducting materials, the strength, the size and the direction of the generated magnetic field can be effectively controlled, and the problems of electric energy loss and heating caused by resistance are reduced. The first protective housing 24 is provided to form a housing space for wrapping the induction coil 22, on one hand, to provide an environment for temperature control of the superconducting material so that the resistance is zero and completely diamagnetic in use of the superconducting material, and on the other hand, the first protective housing 24 provides mounting and protection effects, so that the assembly of the induction coil 22 is prevented from being skewed, and even if the temperature fluctuates to cause the resistance of the coil, the heat energy generated by the resistance can be timely absorbed, and the situation that the heat energy is too large to cause a safety accident is avoided. It should be noted that the driving assembly 10 is correspondingly provided with a second protection housing 15 for protecting the driving coil 12, and the function of the second protection housing is similar to that of the first protection housing 24, which is not described herein again.

As shown in fig. 1, in the technical solution of the present embodiment, the cooling structure 25 includes a cooling pump body 251, a cooling medium storage tank 252 and a transmission pipeline 253, an output end of the cooling pump body 251 is communicated with the accommodating space through the transmission pipeline 253, and an input end of the cooling pump body 251 is communicated with the cooling medium storage tank 252. The arrangement of the cooling medium storage tanks 252 is used for storing cooling medium, the cooling pump body 251 can concentrate the cooling medium in the cooling medium storage tanks 252 and pump the cooling medium into the accommodating space in a pressurizing mode, on one hand, the arrangement is beneficial to controlling the form and the capacity of the cooling medium so as to achieve the required temperature requirement, and on the other hand, the active control can more accurately control the consumption of the cooling medium so as to save the cost. The transfer line 253 is provided independently from the cooling medium storage tank 252, that is, the cooling medium storage tank 252 does not directly introduce the cooling medium into the accommodation space.

In the solution of the present embodiment, the cooling medium storage tank 252 is used for storing a cooling medium, and the cooling medium is liquid nitrogen. The liquid nitrogen is colorless transparent liquid, has the characteristics of inertia, colorless, odorlessness, corrosion resistance and incombustibility, is a common cooling medium which can be prepared in a large amount, has relatively superior economic performance, has good chemical stability and is convenient to store. It should be noted that the material forming the accommodating space has good physical properties, can effectively resist low temperature, and does not occur because of the use of liquid nitrogen, which causes the material to become brittle.

In the technical solution of the present embodiment, the rotating assembly 20 is provided with an energy storage circuit, the induction coil 22 is electrically connected with the energy storage circuit, and the energy storage circuit is electrically connected with the driving circuit of the driving assembly 10 or the driving power supply of the superconducting coil driving mechanism. The energy storage circuit is configured to collect current passing through the induction coil 22, thereby reducing power loss and energy consumption generated by the induction coil 22. The energy storage circuit is electrically connected with the driving circuit of the driving assembly 10 or the driving power supply of the superconducting coil driving mechanism, namely the superconducting coil driving mechanism, firstly, the electric energy is transmitted to the induction coil 22 to generate an induction magnetic field, the current is charged by the energy storage circuit, the energy consumption is reduced, and then the electric energy is transferred to the driving circuit or the driving power supply, so that the recovery and the utilization of the electric energy are realized, and the comprehensive utilization rate of the electric energy is improved, and the energy loss is reduced.

As shown in fig. 1, in the technical solution of the present embodiment, a plurality of driving power sources 14 corresponding to the driving coils 12 one by one are disposed in the first annular panel 11, and the plurality of driving power sources 14 are electrically connected to the driving circuit of the driving assembly 10 respectively. The independent driving power supply 14 can realize the control of the independent driving coil 12, so that the magnetic field control generated by the driving coil 12 is more convenient and more stable, the independent driving power supply 14 supplies energy, the precision control of the magnetic field can be ensured, and the changing magnetic field can be controlled better. It should be noted that, the setting of entry driving machine is used for lasting tunneling, traditional cable power supply can produce energy loss in the power transmission link, especially when just beginning excavation, the cable length of use does not need especially many, the unnecessary loss that long cable produced is too big, when the follow-up excavation degree of depth is darker, the length of long cable is not necessarily enough, whether adopt the mode of splicing again or change the cable and all can cause the delay of time limit for a project, place in the required electric energy of entry driving machine comparatively huge, if adopt the energy supply mode of electricity generation, also can't satisfy the high-power and the stable demand to alternating current, and adopt independent drive power supply 14 can both satisfy stable demand, also can disperse power, satisfy the high-power demand to actuating mechanism.

As shown in fig. 1, in the technical solution of the present embodiment, the driving power supply 14 includes a power supply positive electrode 141 and a power supply negative electrode 142, the driving coil 12 is provided with a first connection terminal 121 and a second connection terminal 122, the power supply positive electrode 141 has a lap joint position with the first connection terminal 121 and the second connection terminal 122, and the power supply negative electrode 142 has a lap joint position with the first connection terminal 121 and the second connection terminal 122. The power source positive electrode 141 and the power source negative electrode 142 of the driving power source 14 can be overlapped with the first wiring terminal 121 or the second wiring terminal 122, namely, the power connection mode of the driving coil 12 can be positive connection or reverse connection, so that the requirements of different magnetic fields can be met, and the driving effect is achieved.

As shown in fig. 1, in the technical solution of the present embodiment, the driving power source 14 is provided with a fixed seat body 143, the first annular panel 11 is provided with a rotating seat 111, the fixed seat body 143 is fixedly connected with the rotating seat 111, and the rotating seat 111 can rotate relative to the first annular panel 11. The fixed base 143 is used for fixing the driving power supply 14, the rotating base 111 is used for driving the driving power supply 14 to switch the anode and the cathode, namely, the steering of the current is realized, because the driving power supply 14 is adopted for supplying power, the adopted power supply is a direct current power supply, the direct current power supply can store electricity without generating reactive power, the energy utilization rate is higher, and the control and the debugging are convenient. The direct current power supply needs to change the current flow direction in the driving coil 12 so as to change the magnetic field direction, the current direction needs to be changed into the opposite direction, and the position of the driving coil 12 is relatively fixed so as to ensure the stability of the magnetic field, so that the lap joint mode of the driving coil 12 is changed by adopting the arrangement of the rotating seat 111.

In an alternative embodiment, the driving power source 14 is fixedly arranged, and the rotating structure of the positive and negative electrodes of the power source can be changed by arranging the rotating structure at the end part of the driving power source 14, so that the physical positions of the positive electrode 141 and the negative electrode 142 of the power source can be switched, the structure ensures the stability of the driving power source 14, the assembly is more suitable, and the requirement on the driving power source 14 is higher.

As shown in fig. 1, in the technical solution of the present embodiment, the driving power supply 14 is provided with a first displacement structure 145 and a second displacement structure 146, the power supply positive electrode 141 is fixedly connected with the first displacement structure 145, the first displacement structure 145 is used for displacing the power supply positive electrode 141 relative to the first connection terminal 121 or the second connection terminal 122, the power supply negative electrode 142 is fixedly connected with the second displacement structure 146, and the second displacement structure 146 is used for displacing the power supply negative electrode 142 relative to the first connection terminal 121 or the second connection terminal 122. The first displacement structure 145 and the second displacement structure 146 are used for stretching and contracting the power anode 141 and the power cathode 142, when the power anode 141 and the power cathode 142 are switched, the power anode 141 is removed from the first wiring terminal 121 through the first displacement structure 145, the power cathode 142 is removed from the second wiring terminal 122 through the second displacement structure 146, and then the power anode 141, the power cathode 142, the first wiring terminal 121 and the second wiring terminal 122 are switched, so that the damage during the switching is avoided.

The first displacement structure 145 and the second displacement structure 146 may be telescopic arms or elastic coil springs, and may be configured to extend and retract the power supply positive electrode 141 or the power supply negative electrode 142.

As shown in fig. 1, in the technical solution of the present embodiment, a signal transmitter 221 is disposed on a side of each induction coil 22 facing the first annular panel 11, and the first annular panel 11 is provided with a signal receiver 112, and the signal receiver 112 receives a signal transmitted by the signal transmitter 221 to detect a real-time position of the induction coil 22. The arrangement of the signal transmitter 221 and the signal receiver 112 is used for detecting the real-time position of the induction coil 22 so as to detect the rock breaking efficiency and speed of the heading machine and the physical action condition of the heading machine and achieve the effect of precise control.

In the solution of the present embodiment, the signal transmitter 221 is a laser transmitter, and the signal receiver 112 is a laser receiver. The signal transmitter 221 is a laser transmitter, and can individually emit laser light, and the signal receiver 112 is a plate-shaped receiver, which has a larger area and can correspondingly receive the laser beam signal emitted by each induction coil 22 at each position.

In the technical solution of the present embodiment, a first spiral lead frame is fixedly disposed on the first annular panel 11, the driving coil 12 is fixed along the peripheral outer side of the first spiral lead frame, a second spiral lead frame is fixedly disposed on the second annular panel 21, and the induction coil 22 is fixed along the peripheral outer side of the second spiral lead frame. The setting of first spiral lead frame and second spiral lead frame is used for accurate assembly driving coil 12 and induction coil 22, and such setting is used for accurate control magnetic field that produces to compare in traditional setting around the fixed axle, first spiral lead frame and second spiral lead frame, the intermediate position of both is the fretwork and arranges, can reduce the use amount of material effectively, and then reduces the weight of drive assembly 10 and rotating assembly, satisfies the condition of operation requirement at structural strength, can reduce the energy consumption.

It should be noted that, the fixed shaft body 13 is provided with a cylindrical passage penetrating through the axis for arrangement of the transmission coil 26, and the structure makes the fixed shaft body 13 cylindrical, with higher structural strength, and the bearing 23 is a rotating bearing, so that connection with the fixed shaft body 13 is also more convenient.

In a second aspect, an embodiment of the present application provides a heading machine cutterhead, where the heading machine cutterhead includes a cutterhead main body 31 and a superconducting coil driving mechanism, where the superconducting coil driving mechanism is the superconducting coil driving mechanism in the foregoing embodiment, and the cutterhead main body 31 is fixedly connected to a side, far from the first annular panel 11, of the second annular panel 21 of the superconducting coil driving mechanism. By using the driving machine cutterhead of the superconducting coil driving mechanism, driving tunneling is not required by adopting a mode of driving by using hydraulic or motor to cooperate with a speed reducer, the running loss of electric energy is effectively reduced, the utilization rate of energy is improved, the superconducting material is arranged, the driving coil 12 and/or the induction coil 22 can be ensured to have complete diamagnetism, namely, the internal magnetic field of the material is zero, the generated induction magnetic field is more accurate and controllable, the condition that the material influences the magnetic field to generate is avoided, and the running of the cutterhead main body 31 is more accurate.

The development machine cutterhead in the application adopts an advanced superconducting coil driving technology, electromagnetic force action between electrified coils is fully exerted, the cutterhead is directly driven to rotate by electromagnetic force generated after the coil arranged behind the cutterhead is electrified, the mechanical structure is simple, the energy utilization efficiency is improved, and the energy loss is reduced.

The cutterhead main body 31 is driven to rotate by electromagnetic force between the rear-mounted electrified coil devices (the driving assemblies 10) in the cutterhead 30 of the development machine, the strength of the electromagnetic force is directly influenced by the current in the coils through adjusting, and the rotation speed of the cutterhead is flexibly controlled to meet the requirements of development speeds under different geological conditions, so that continuous construction can be realized, the construction cost is reduced, and the construction speed is improved. The electromagnetic acting force direction between the coils is influenced by the current direction in the coils, and the stress direction of each coil can be changed by changing the current direction in the drive coil 12 so as to change the rotation direction of the cutterhead main body 31, thereby being convenient for coping with various complex working conditions.

In a third aspect, an embodiment of the present application provides a hard rock tunnel boring machine, including a boring machine cutterhead of the above embodiment. The hard rock tunnel boring machine is a TBM construction device formed by integrally lining and splicing a magnetic suspension track and a duct piece, and comprises the boring machine cutterhead, so that the boring efficiency is high, and the energy consumption is lower than that of a traditional boring machine.

As shown in fig. 4 to 7, in the technical solution of the present embodiment, a hard rock tunnel boring machine includes: the tunneling mechanism comprises a driving assembly 10, a rotating assembly 20 and a tunneling machine cutterhead 30, wherein a plurality of driving coils 12 are arranged on one side of the driving assembly 10 facing the rotating assembly 20, a plurality of induction coils 22 which are in one-to-one correspondence are arranged on one side of the rotating assembly 20 facing the driving assembly 10, the tunneling machine cutterhead 30 is arranged on one side of the rotating assembly 20 facing away from the driving assembly 10, and the driving coils 12 and/or the induction coils 22 are made of superconducting materials; the assembly mechanism 80 is arranged on one side, far away from the cutterhead 30 of the heading machine, of the heading mechanism, the assembly mechanism 80 comprises a grabbing component 81 and a displacement component 82 which are fixedly connected, the grabbing component 81 is used for clamping the integrated duct piece 40 and assembling the duct piece 50, the displacement component 82 moves the grabbing component 81 to complete assembly of the integrated duct piece 40 and the assembled duct piece 50, and the integrated duct piece 40 is provided with a magnetic suspension track structure 41.

The driving coil 12 and/or the induction coil 22 made of superconducting materials are used for driving the heading machine cutterhead 30, so that high conversion rate and high utilization rate of electric energy can be realized, tunneling power is increased, meanwhile, the assembly mechanism 80 is arranged on one side of the tunneling mechanism, an installation space is leaked along with gradual excavation of the tunneling mechanism, the assembly mechanism 80 is used for installing the integrated pipe piece 40 and the assembled pipe piece 50, and excavation and assembly work are synchronously carried out, so that tunnel construction efficiency is improved. The method and the device effectively solve the problems that the comprehensive construction efficiency is low and the construction period is long due to the fact that the tunnel construction in the prior art is affected by the process and the rock breaking efficiency.

It should be noted that, in the technical solution of this embodiment, the driving coil 12 and the induction coil 22 can directly adopt electric power to generate the magnetic field to drive the cutterhead main body 31, so that the secondary force action conversion is avoided, the energy conversion times are reduced by such arrangement, the energy conversion efficiency is high, the cutting effect applied to the cutterhead main body 31 is better, and on the other hand, the superconducting material is arranged to ensure that the circuit operation can not generate heat loss due to the resistance of the coil, namely, the operation loss of electric energy is reduced, and the utilization rate is higher. The arrangement of the superconducting material also ensures that the material of the driving coil 12 and/or the induction coil 22 has complete diamagnetism, i.e. the magnetic field inside the material is zero, so that the generated induction magnetic field is more accurate and controllable, the situation that the material influences the generation of the magnetic field can not occur, and the operation of the cutterhead main body 31 is more accurate.

As shown in fig. 4 to 7, in the technical solution of the present embodiment, the hard rock tunnel boring machine further includes a main beam 90, the grabbing component 81 is slidably connected with the displacement component 82, the displacement component 82 can slide along the length direction of the main beam 90, and the displacement component 82 can rotate around the axis of the main beam 90. The setting of girder 90 is used for supporting and keeping stable in structure, snatchs subassembly 81 and displacement subassembly 82 and sets up on girder 90, and the benchmark of its activity is unanimous with the benchmark of tunneling mechanism, and the benchmark in the tunnel is unanimous, installs integrated section of jurisdiction 40 and assembles the benchmark of section of jurisdiction 50 unanimously, and assembly effect and tunneling effect direct connection, the integrative tunnel structure of formation is stable to error range is minimum, can realize accurate tunnel construction.

As shown in fig. 4 to 7, in the technical solution of the present embodiment, the gripping assembly 81 includes a vacuum chuck 811, and an extension arm 812 is disposed between the vacuum chuck 811 and the displacement assembly 82, and the extension arm 812 can extend and retract along the length direction thereof. The vacuum chuck 811 is arranged to suck the integrated duct piece 40 and the spliced duct piece 50, the principle is that negative pressure is generated through the vacuum chuck 811, the integrated duct piece 40 and the spliced duct piece 50 are not damaged due to the fact that the vacuum chuck 811 is arranged, the clamping position and the clamping range are more selected, and therefore the integrated duct piece 40 and the spliced duct piece 50 are in different forms and positions, and the vacuum chuck is more suitable for accurate installation. The arrangement of the extension arm 812 is used to adjust the specific position of the vacuum chuck 811, which avoids movement interference when the work vehicle 100 is moving, and ensures the safety of the assembly mechanism 80.

It should be noted that the vacuum chuck 811 is rotatably connected to the extension arm 812, so that the vacuum chuck 811 can be adjusted in angle after the integrated tube sheet 40 is gripped and the tube sheet 50 is assembled, so as to facilitate assembly. Extension arm 812 is rotatably coupled to displacement assembly 82 to effect assembly of assembled segments 50 of the top and side walls.

As shown in fig. 4 to 7, in the technical solution of this embodiment, the hard rock tunnel boring machine further includes a supporting mechanism 60, where the supporting mechanism 60 includes a shield 61 and a shield support 62 that are fixedly connected, the shield support 62 is fixedly disposed on a main beam 90, and the shield 61 can be supported outwards along a direction away from the shield support 62. The support mechanism 60 is used for supporting the side wall of the rock mass, avoiding the situation of extrusion or rock wall loss caused to the equipment after tunneling, and playing a role in preventing rock and soil from sliding into the equipment, and providing an assembly position and an assembly foundation for the assembly of the subsequent integrated duct piece 40 and the assembled duct piece 50.

As shown in fig. 4 to 7, in the technical solution of this embodiment, the hard rock tunnel boring machine further includes a propulsion mechanism 70, where the propulsion mechanism 70 includes a plurality of propulsion cylinders 71, the propulsion cylinders 71 are fixedly connected with one end of the shield support 62 away from the tunneling mechanism, and along the direction of the center line of the tunnel, the output end of the propulsion cylinders 71 coincides with the integrated segment 40 or the spliced segment 50. The setting of propulsion hydro-cylinder 71 is used for supporting pushing away fashioned section of jurisdiction to the tunnelling mechanism that is located the front end is promoted to the section of jurisdiction as the basis, realizes tunnelling mechanism's jacking, and such setting can fix integrated section of jurisdiction 40 or assemble section of jurisdiction 50 on the one hand, and the assembly is more firm, can restrict the forward pushing position through integrated section of jurisdiction 40 or assemble section of jurisdiction 50 in addition, in order to avoid propulsive direction accurate.

It should be noted that, the plurality of pushing cylinders 71 may correspond to different integrated duct pieces 40 or assembled duct pieces 50 respectively, such pushing force dispersion may not generate damage to the integrated duct pieces 40 or assembled duct pieces 50, and the plurality of pushing cylinders 71 may control pushing force, and may further control a direction of excavation, so as to ensure accuracy of a pushing direction.

After the magnetic levitation track structure 41 is formed as shown in fig. 8, the working vehicle 100 is matched with the magnetic levitation track structure according to the structural principle as shown in the figure, and the opposite magnetic fields generated by the tracks on two sides are matched with the opposite magnetic fields generated by two sides of the vehicle body, so that the vehicle body can advance in a preset direction.

As shown in fig. 9 to 14, an embodiment of the present application provides a split shield segment assembly integrated with a magnetic levitation track, including: the integrated duct piece 40 and the spliced duct piece 50 are provided with a magnetic suspension track structure 41 and a temperature maintaining structure 42, the magnetic suspension track structure 41 is fixedly arranged in the integrated duct piece 40, the arrangement direction of the magnetic suspension track structure 41 is parallel to the axis direction of the integrated duct piece 40, the output end of the temperature maintaining structure 42 is communicated with the magnetic suspension track structure 41, the two ends of the integrated duct piece 40 are respectively provided with a first electric connection interface 43 and a second electric connection interface 44 along the arrangement direction of the magnetic suspension track structure 41, the adjacent integrated duct pieces 40 are detachably connected, and the first electric connection interfaces 43 are electrically connected with the second electric connection interfaces 44 of the adjacent integrated duct pieces 40; the segment 50 is detachably connected to both sides of the integrated segment 40 that are disposed parallel to the axis of the integrated segment 40.

The arrangement of the magnetic suspension track structure 41 and the temperature maintaining structure 42 enables the track to be integrated with the integrated duct piece 40, when duct piece arrangement of a tunnel is carried out, the first electric connection interfaces 43 and the second electric connection interfaces 44 of adjacent integrated duct pieces can be mutually overlapped, a circuit path is realized, track installation is carried out when duct piece installation is carried out, and when materials are transported, material arrangement of track transportation is saved, that is, unified arrangement of the track and the duct piece can be realized by the integrated duct piece 40 and the spliced duct piece 50, time for installing the track after duct piece arrangement and manpower and material resource consumption are shortened, and further the construction period of site construction is shortened. The utility model provides an effectively solve among the prior art lay the track in the tunnel need after accomplishing tunnel excavation and section of jurisdiction and arrange to orbital material need follow the transportation in the ground to the tunnel, lead to the time limit for a project extension, the problem of low in construction efficiency.

As shown in fig. 9, 11 and 12, in the technical solution of the present embodiment, the magnetic levitation track structure 41 includes a floating coil group 411 and a limiting coil group 412, the floating coil group 411 is used for providing buoyancy for the vehicle body, and the limiting coil group 412 is used for limiting the circumferential degree of freedom of the vehicle body. The limiting coil set 412 is used for limiting the position and form of the vehicle body, avoiding the occurrence of derailment or friction caused by contact of the vehicle body with the track, and can also be used for correcting deviation of the vehicle body, and the vehicle body can be a working vehicle 100 in a heading machine, namely, the magnetic levitation track structure 41 is assembled and used at the same time. It should be noted that, the arrangement of the floating coil assembly 411 and the limiting coil assembly 412 may form a loop independently, that is, the first electrical connection interface 43 and the second electrical connection interface 44 do not affect the floating coil assembly 411 and the limiting coil assembly 412, so that the use of the magnetic levitation track structure 41 is not limited by the closing of the circuit, the application is more convenient, and the magnetic levitation track structure 41 can be put into use after the assembly of the segment, and the assembly of the segment does not affect the construction process, and the magnetic levitation track structure 41 is more standardized, thereby reducing the assembly requirement, and the compactness of the track is stronger and the assembly difficulty is also greatly reduced.

As shown in fig. 9 to 12, in the technical solution of the present embodiment, the magnetic levitation track structure 41 includes a first track 413 and a second track 414 extending in a direction parallel to the axis of the integrated segment 40, the floating coil group 411 includes a first floating coil 4111 and two second floating coils 4112, the first floating coil 4111 is disposed on a plane between the first track 413 and the second track 414, and the two second floating coils 4112 are disposed on planes of the first track 413 and the second track 414 near the axis direction, respectively. The arrangement of the first rail 413 and the second rail 414 serves to arrange the floating coil group 411 and the limit coil group 412 and as a guiding reference for the first rail 413, the arrangement of the two rails can effectively combine the guiding positions for guiding the magnetic levitation track structure 41, thereby achieving an accurate arrangement.

It should be noted that, the magnetic fields of the first floating coil 4111 and the two second floating coils 4112 are the same in direction and all are set up towards the upper side, and such a setting is used for increasing the buoyancy of magnetic levitation, so as to avoid the car body from being too close to the track. Further, the first floating coil 4111 mainly corresponds to the bottommost part of the vehicle body, the second floating coil 4112 mainly corresponds to the corresponding position between the vehicle body and the track, and different coils are arranged at different positions to be corresponding to each other, so that the levitation effect is better. As shown in fig. 10, in the corresponding vehicle body, each coil needs to be provided with a different acting coil correspondingly, so as to achieve the optimal acting state and control effect, and provide more stable magnetic force support during the running process of the vehicle body.

As shown in fig. 9 to 12, in the technical solution of the present embodiment, the limiting coil set 412 includes a first limiting coil 4121 and a second limiting coil 4122, the first limiting coil 4121 is disposed on a side of the first rail 413 facing the second rail 414, and the second limiting coil 4122 is disposed on a side of the second rail 414 facing the first rail 413. The arrangement of the first limiting coil 4121 and the second limiting coil 4122 is used for exerting a corresponding repulsive force, and the repulsive force is exerted between the first limiting coil 4121 and the second limiting coil 4122, so that the arrangement of the rails can be stabilized on the one hand, the rails receive an approximately pre-stress effect, when a vehicle body enters between the first rail 413 and the second rail 414, the repulsive force or the attractive force exerted on the same position is opposite in direction, the vehicle body can be balanced, balance can be quickly restored when the vehicle body turns, and stability is improved. It should be noted that, the positions corresponding to the first limiting coil 4121 and the second limiting coil 4122 may be provided with coils that are repulsive to the first limiting coil 4121 and the second limiting coil 4122, so that the first limiting coil 4121 and the second limiting coil 4122 repel the vehicle body to form a clamping-like effect, which can prevent detachment and increase balance of the vehicle body on the magnetic levitation track structure 41.

As shown in fig. 9 to 12, in the technical solution of the present embodiment, the magnetic levitation track structure 41 includes a driving coil group 416, and the driving coil group 416 is disposed between a first track 413 and a second track 414. The driving coil groups 416 are arranged for driving the vehicle body, that is, the magnetic field is changed regularly by alternating adjacent driving coil groups 416, so that the vehicle body can move forwards and backwards.

As shown in fig. 12, in the technical solution of the present embodiment, the driving coil group 416 includes a first driving coil 4161 and a second driving coil 4162, the first driving coil 4161 is disposed on a side of the first track 413 facing the second track 414, and the second driving coil 4162 is disposed on a side of the second track 414 facing the first track 413. The arrangement makes the traction force or thrust force formed by the driving coil assembly 416 be balanced force along the track direction, namely, the situation that deflection does not occur, thereby reducing the possibility of the vehicle body deflecting to run and stabilizing the vehicle form.

It should be noted that, the first driving coil 4161 and the second driving coil 4162 are located below the corresponding first limiting coil 4121 and second limiting coil 4122, so that the pulling force or the pushing force is located under the clamping force formed by the first limiting coil 4121 and the second limiting coil 4122, so that the vehicle body can be prevented from escaping outwards under the repulsive force of the first limiting coil 4121 and the second limiting coil 4122.

In the technical solution of the present embodiment, the floating coil set 411, the limiting coil set 412 and the driving coil set 416 are all made of superconducting materials. The provision of superconductor material stabilizes the magnetic field to facilitate control of the maglev track structure 41 and reduces the energy consumption of the vehicle body for its operation.

As shown in fig. 9 and 10, in the technical solution of the present embodiment, the integrated duct piece 40 includes a duct piece main body 45 and a duct piece cover 46, the duct piece cover 46 is fixedly connected with the duct piece main body 45, the duct piece cover 46 is respectively in clearance fit with a first track 413 and a second track 414, and a cooling cavity is formed between the duct piece cover 46 and the duct piece main body 45. The cooling cavity formed by the tube sheet cover 46 is used for wrapping the floating coil group 411, the limiting coil group 412 and the driving coil group 416, on one hand, the environment for controlling the temperature of the superconducting material is provided, so that the resistance in the use of the superconducting material is zero and the superconducting material is completely diamagnetic, on the other hand, the tube sheet cover 46 provides a protection effect, and even if the temperature fluctuates to cause the resistance of the coil, the heat energy generated by the resistance can be timely absorbed, so that the situation of safety accidents is avoided.

It should be noted that, the duct piece cover 46 is integrally connected with the duct piece main body 45 through an integrally formed manner, that is, after each coil group is fixedly installed, the duct piece cover 46 is formed again, so that the structure is compact, the protection performance is better, the escape of the refrigerant can be avoided, and a higher environment is provided for the operation of the superconductor.

As shown in fig. 12, in the technical solution of the present embodiment, the temperature maintaining structure 42 includes a conveying pump body 421 and a refrigerant storage tank 422, and an output end of the conveying pump body 421 is communicated with the cooling cavity. The conveying pump body 421 can pump the refrigerants in the plurality of refrigerant storage tanks 422 into the cooling cavity in a pressurizing mode, so that the arrangement is favorable for controlling the form and the capacity of the refrigerants on one hand so as to meet the required temperature requirement, and on the other hand, the active control can control the consumption of the refrigerants more accurately so as to save the cost. The refrigerant can be liquid nitrogen, the liquid nitrogen is colorless transparent liquid, and has the characteristics of inertia, colorless, odorlessness, non-corrosiveness and incombustibility, and is a common cooling medium which can be prepared in a large amount, and the refrigerant has relatively superior economic performance, good chemical stability and convenient storage.

In the technical solution of this embodiment, the integrated segment 40 is provided with a transformer module, and the transformer module is electrically connected with the floating coil assembly 411, the limiting coil assembly 412 and the driving coil assembly 416 respectively, so as to control the current directions in the floating coil assembly 411, the limiting coil assembly 412 and the driving coil assembly 416. The setting of vary voltage module can change the direction of electric current effectively on the one hand for the magnetic field that the floating coil group 411 of different positions, spacing coil group 412 and driving coil group 416 present can be controlled, on the other hand, the principle that vary voltage module adopted can realize the circuit mutual independence in the independent integrated section of jurisdiction 40, and such setting makes magnetic suspension track structure 41 can not influence each other on the circuit after connecting, only need through the break-make of a main circuit realization circuit can, also belongs to parallelly connected state between the adjacent integrated section of jurisdiction 40.

As shown in fig. 10 to 13, in the technical solution of the present embodiment, the first electrical connection 43 is a bump, the bump extends along a direction away from the integrated tube sheet 40, and the second electrical connection 44 is a groove, and the groove is adapted to the bump. The groove and the bump are simple in arrangement structure and high in matching precision, the electric connection piece can be arranged at the position where the groove and the bump are contacted, namely, the electric connection can be completed by completing the assembly of the groove and the bump, and the structure is simple in assembly mode and beneficial to the realization of assembly operation.

It should be noted that, when adjacent integrated duct pieces 40 are assembled, an integrated duct piece 40 needs to be electrified at intervals, and the arrangement is such that the safety can be ensured in the electrification test of the duct piece after assembly, and the duct piece can be rearranged even if the electrification is in error, so that the assembly adaptability is strong and the construction reliability is stronger.

As shown in fig. 10 to 13, in the technical solution of the present embodiment, two side walls of the first electrical connection port 43 are provided with a limiting clamping block 431, two side walls of the second electrical connection port 44 are provided with a limiting clamping groove 441, and when the adjacent integrated tube sheets 40 are connected, the limiting clamping groove 441 is clamped with the limiting clamping block 431. The limiting clamping blocks 431 and the limiting clamping grooves 441 can form clamping connection, so that the adjacent integrated duct pieces 40 are connected more stably, and the combination degree is higher. It should be noted that, as shown in fig. 3 and fig. 5, in a specific embodiment, two sides of the end portion of the limiting clamping block 431 are provided with an inwardly extending clamping groove, and an inwardly extending clamping member is provided corresponding to the limiting clamping groove 441, so that the two parts can form a limit along the extending direction of the rail when being clamped and butted with each other, and further the adjacent integrated duct pieces 40 are connected and fastened.

As shown in fig. 10 to 13, in the technical solution of the present embodiment, the bottom of the first electrical connection port 43 is provided with a first electrical connection piece 432, the bottom wall of the second electrical connection port 44 is provided with a second electrical connection piece 442, and when adjacent integrated circuit chips 40 are connected, the first electrical connection piece 432 is in contact with the second electrical connection piece 442. The first electrical connection piece 432 and the second electrical connection piece 442 can be electrically connected after the first electrical connection interface 43 and the second electrical connection interface 44 are assembled, so that on one hand, the direct electrical connection cannot occur in the assembly process, and the electric leakage occurs in the assembly process, and on the other hand, the first electrical connection piece 432 and the second electrical connection piece 442 can be judged to meet the assembly requirements after being conducted.

It should be noted that, as shown in fig. 9 to 14, the duct piece main body 45 of the integrated duct piece 40 provided in this embodiment of the present application further includes a first locking groove 451 and a first locking block 452, the assembled duct piece 50 is correspondingly provided with a second locking groove 51 and a second locking block 52, the shape and volume of the first locking block 452 and the second locking block 52 are the same, the shape and volume of the first locking groove 451 and the second locking groove 51 are the same, that is, the first locking groove 451 may be matched with the first locking block 452 and the second locking block 52, the second locking groove 51 may be matched with the first locking block 452 and the second locking block 52, so the assembly between the assembled duct piece 50 and the integrated duct piece 40 is more convenient, and the assembly between adjacent duct piece groups is also the same, so the assembly process is more convenient. It should be noted that, the first locking groove 451 may be matched with the first locking block 452 and the second locking block 52, and the second locking groove 51 may be matched with the first locking block 452 and the second locking block 52, and the fastening device may be used for connecting, so that the component structure is simple and convenient to install, and has good structural strength.

Furthermore, in order to facilitate the replenishment of the cooling medium, pipelines can be arranged at the positions of the locking blocks and the locking grooves, and the pipelines are connected in series when the locking blocks and the locking grooves are matched, so that the replenishment of the cooling medium is performed through the cooling medium inlets at the two ends of the tunnel. Furthermore, the materials of the pipeline and the like which are contacted with the liquid nitrogen can be austenitic stainless steel materials, the ultralow-temperature environment can be effectively resisted, a layer of heat-insulating coating consisting of hollow glass microspheres made of borosilicate glass and aerogel materials can be coated on the outer side of austenitic stainless steel, the hollow glass microspheres made of borosilicate glass are doped in aerogel materials, the aerogel is a heat-insulating material, and the hollow glass microspheres made of borosilicate glass can further improve the heat insulation property.

The application also provides an alternative embodiment, this embodiment provides a split shield constructs section of jurisdiction subassembly of integrated magnetic levitation track, and it includes: the pipe segment cover 46 comprises an integrated pipe segment 40, an assembled pipe segment 50, a first locking groove 451, a first locking block 452, a second locking groove 51, a second locking block 52, bolts, a refrigerant storage tank 422, a conveying pump body 421 and a pipe segment cover 46.

Structural description: the utility model provides an assembled shield constructs section of jurisdiction subassembly of integrated magnetic suspension track can accomplish the track and mat formation when the section of jurisdiction is assembled. Each ring segment is spliced by the integrated segment 40 at the bottom and the spliced segment 50 at the rest. The first floating coil 4111, the first limiting coil 4121 and the driving coil set 416 are arranged in the integrated tube sheet 40, and the refrigerant storage tank 422 and the conveying pump body 421 are further installed in the integrated tube sheet 40 and separated from other parts by the tube sheet cover 46. The plurality of integrated tube sheets 40 are lapped and connected with the second electric connector 442 of the second electric connector 44 through the first electric connector 43 to transmit electric power, and are transmitted into liquid nitrogen for cooling the superconducting coil through the transmission pump body 421. The segments are connected and fixed into a ring through the connection of the bolts with the first locking blocks 452 and the second locking blocks 52.

Relationship between parts: the first limiting coil 4121 and the driving coil group 416 are vertically placed in the upper track portion of the integrated segment 40, and the first floating coil 4111 is horizontally placed in the upper track portion and the bottom plane portion of the integrated segment 40. The integrated tube sheet 40 is internally provided with a refrigerant storage tank 422 and a conveying pump body 421. The segment cover 46 separates the superconducting coil first floating coil 4111, the first spacing coil 4121, the drive coil assembly 416, and other devices below the planar portion of the integrated segment 40. The first electrical connection port 43 protrudes outwards from the plane of the integrated pipe sheet 40, the second electrical connection piece 442 is arranged below the first electrical connection port 43, the second electrical connection port 44 is located on the same axis as the first electrical connection port 43 at the plane of the integrated pipe sheet 40, and the first electrical connection ports 43 of two adjacent integrated pipe sheets 40 can be completely fit into the second electrical connection port 44.

The functions of the parts are as follows: each ring segment is spliced by the integrated segment 40 at the bottom and the spliced segment 50 at the rest. The longitudinal connection between the segments is realized through an axial fixing joint boss (a first locking block 452 or a second locking block 52) and an axial fixing joint groove (a first locking groove 451 or a second locking groove 51) on the same axis with the axial fixing joint boss, bolt hole sites are prefabricated in the axial fixing joint boss and the axial fixing joint groove, and when the axial fixing joint boss is placed in the axial fixing joint groove, bolts can be inserted into the axial fixing joint boss and the axial fixing joint groove to connect the axial fixing joint boss and the axial fixing joint groove. The circumferential connection between the segments is realized by a radial fixing joint boss (a first locking block 452 or a second locking block 52) and a radial fixing joint groove (a first locking groove 451 or a second locking groove 51) on the same circumferential line with the radial fixing joint boss, bolt hole sites are prefabricated in the radial fixing joint boss and the radial fixing joint groove, and when the radial fixing joint boss is placed in the radial fixing joint groove, bolts can be inserted into the radial fixing joint boss and the radial fixing joint groove to connect the radial fixing joint boss and the radial fixing joint groove. The second electrical connectors 442 are installed on the downward side of the first electrical connector 43 and the upward side of the second electrical connector 44, and when the second electrical connector 442 of the first electrical connector 43 of the newly installed integrated segment 40 is overlapped with the second electrical connector 442 in the second electrical connector 44 of the existing integrated segment 40, the second electrical connector 442 can conduct electricity, so that the newly installed integrated segment 40 is electrified, and then each coil in the newly installed integrated segment is powered. The first floating coil 4111 in the integrated tube sheet 40 generates an upward magnetic field after being electrified to lift the vehicle body above the track to suspend the vehicle body, the first limiting coils 4121 on the two sides of the track generate a magnetic field to limit the vehicle body above the track to move left and right so as to enable the vehicle body above the track to stably run, and the driving coil group 416 changes the current direction under the action of alternating current so as to alternately change the magnetic field direction to pull the vehicle body above the track to move. The conveying pump body 421 can also pump the liquid nitrogen in the refrigerant storage tank 422 into the first floating coil 4111, the first limiting coil 4121 and the driving coil assembly 416 wrapped by the tube sheet cover 46 to maintain the low-temperature superconducting property.

In a fourth aspect, an embodiment of the present application provides a tunnel construction method, where the tunnel construction method uses the hard rock tunnel boring machine as described above, and the tunnel construction method further includes the following steps:

s10, starting a tunneling mechanism, and driving a rotating assembly 20 to drive a tunneling machine cutterhead 30 to rotate through a driving assembly 10; specifically, the induction coil 22 in the rotating assembly 20 is electrified to generate a magnetic field, and the cooling pump body 251 is controlled to continuously inject liquid nitrogen into the accommodating cavity, so that the induction coil 22 is in a low-temperature state, the physical property becomes zero resistance and complete diamagnetism, at the moment, the driving power supply 14 is used for supplying power to the driving coil 12, the driving coil 12 generates the magnetic field for driving the induction coil 22, and at the moment, the second annular panel 21 rotates, so that the heading machine cutterhead 30 is driven to rotate to cut.

Further, under the support protection of the shield 61 and the shield body bracket 62, the heading machine cutterhead 30 is driven by the rotating assembly 20 to rotate and cut the rock mass in front, and meanwhile, the pushing cylinder 71 at the tail of the shield 61 pushes the integrated segment 40 and the spliced segment 50, so that the whole equipment moves forward.

S20, pushing a tunneling mechanism to advance to cut a rock mass by a pushing mechanism 70 of TBM construction equipment assembled by a magnetic suspension track and a segment integrated lining; the plurality of propulsion cylinders 71 of the propulsion mechanism 70 push against the installed integrated segment 40 and the assembled segment 50 so that the integrated segment 40 and the assembled segment 50 are tightly combined, and simultaneously the heading machine cutterhead 30 is propelled to excavate forward.

S30, after the propelling mechanism 70 finishes propelling, the integrated duct piece 40 and the spliced duct piece 50 are spliced in sequence through the grabbing component 81 and the displacement component 82; after the plurality of pushing cylinders 71 are pushed to a certain position, the positions where the integrated duct piece 40 and the spliced duct piece 50 can be assembled are exposed, and then the materials are carried and assembled through the grabbing component 81 and the displacement component 82.

S40, repeating the step S10. The excavation and segment assembly are continuously carried out.

In the technical solution of the present embodiment, after the propulsion mechanism 70 completes the propulsion, the method further includes the following steps:

s21, each of the thrust cylinders 71 of the thrust mechanism 70 is retracted. The pushing cylinder 71 is retracted to provide a space for the installation of the pipe piece, and after the pipe piece is assembled, the port of the pushing cylinder 71 is contacted with the pipe piece to provide a pushing action for the next pushing. The part of the pushing cylinders 71 of the integrated duct sheet 40 which is supported at the bottom is contracted forward to make room for installing a new integrated duct sheet 40, and then the other pushing cylinders 71 are contracted gradually, so that the installation sequence is fixed.

In the technical solution of this embodiment, the integrated duct piece 40 and the spliced duct piece 50 are sequentially spliced by the grabbing component 81 and the displacement component 82, and further includes the following steps:

S41, the integrated duct piece 40 is clamped by the vacuum chuck 811 of the grabbing component 81, negative pressure is generated by the vacuum chuck 811 of the specific assembling mechanism 80, the integrated duct piece 40 is attached to the vacuum chuck 811, grabbing of the integrated duct piece 40 is completed, the integrated duct piece 40 is lifted to a designated position through the extension arm 812 and the displacement component 82 and then put down, then the grabbing component 81 and the displacement component 82 are matched to achieve grabbing of the assembled duct piece 50, the assembled duct piece is installed at other annular positions connected with the integrated duct piece 40, the first electric connection port 43 of the integrated duct piece 40 is inserted into the second electric connection port 44 in the installation process, a connecting circuit is formed after connection, and each coil in the newly paved integrated duct piece 40 is charged and detected.

S42, the first electrical connector 43 of the adjacent integrated circuit chip 40 is inserted into the second electrical connector 44 by the displacement assembly 82, so that the first electrical connector 432 of the first electrical connector 43 contacts the second electrical connector 442 of the second electrical connector 44. Specifically, the integrated duct piece 40 is sucked by the vacuum chuck 811 of the grabbing component 81, the integrated duct piece 40 is operated to the previous integrated duct piece 40 by the displacement component 82 and the extension arm 812, after the first electrical connection port 43 and the second electrical connection port 44 of the integrated duct piece 40 are connected, the installation of the integrated duct piece 40 is completed by binding bolts, then the assembled duct piece 50 is grabbed again by the vacuum chuck 811, and the above assembly steps are repeated. The assembly process is accurate and stable, the action space and time of the tunneller during excavation are utilized, and the construction efficiency is improved.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A superconducting coil drive mechanism for driving a cutterhead (30) of a heading machine, comprising:

the driving assembly (10), the driving assembly (10) comprises a first annular panel (11), a plurality of driving coils (12) and a fixed shaft body (13), the driving coils (12) are uniformly arranged around the axis of the first annular panel (11), the fixed shaft body (13) is fixedly connected to one side of the first annular panel (11) where the driving coils (12) are arranged, and the axis of the fixed shaft body (13) coincides with the axis of the first annular panel (11);

the rotary assembly (20), the rotary assembly (20) comprises a second annular panel (21), a plurality of induction coils (22) and bearings (23), the induction coils (22) and the driving coils (12) are arranged in a one-to-one correspondence mode, the induction coils (22) are evenly arranged on one side, facing the first annular panel (11), of the second annular panel (21) around the axis of the second annular panel (21), the outer ring of the bearings (23) is fixedly connected with the second annular panel (21), the inner ring of the bearings (23) is fixedly connected with the fixed shaft body (13), and a cutterhead main body (31) of a heading machine cutterhead (30) is arranged on one side, facing away from the first annular panel (11), of the second annular panel (21);

The drive coil (12) and/or the induction coil (22) are/is made of superconducting material;

the rotating assembly (20) is provided with an energy storage circuit, the induction coil (22) is electrically connected with the energy storage circuit, and the energy storage circuit is electrically connected with a driving circuit of the driving assembly (10) or a driving power supply of the superconducting coil driving mechanism;

a plurality of driving power supplies (14) which are in one-to-one correspondence with the driving coils (12) are arranged in the first annular panel (11), and the driving power supplies (14) are respectively and electrically connected with a driving circuit of the driving assembly (10);

the driving power supply (14) comprises a power supply positive electrode (141) and a power supply negative electrode (142), the driving coil (12) is provided with a first wiring terminal (121) and a second wiring terminal (122), the power supply positive electrode (141) is respectively provided with a lap joint position with the first wiring terminal (121) and the second wiring terminal (122), the power supply negative electrode (142) is respectively provided with a lap joint position with the first wiring terminal (121) and the second wiring terminal (122), the driving power supply (14) is provided with a fixed seat body (143), the first annular panel (11) is provided with a rotating seat (111), the fixed seat body (143) is fixedly connected with the rotating seat (111), and the rotating seat (111) can rotate relative to the first annular panel (11);

The driving power supply (14) is provided with a first displacement structure (145) and a second displacement structure (146), the power supply anode (141) is fixedly connected with the first displacement structure (145), the first displacement structure (145) is used for enabling the power supply anode (141) to displace relative to the first wiring terminal (121) or the second wiring terminal (122), the power supply cathode (142) is fixedly connected with the second displacement structure (146), and the second displacement structure (146) is used for enabling the power supply cathode (142) to displace relative to the first wiring terminal (121) or the second wiring terminal (122).

2. Superconducting coil drive mechanism according to claim 1, wherein the induction coil (22) is made of superconducting material, the rotating assembly (20) comprising a first protective housing (24) and a cooling structure (25), the first protective housing (24) and the second annular panel (21) forming a receiving space for the induction coil (22), the cooling structure (25) delivering a cooling medium to the receiving space.

3. The superconducting coil drive mechanism according to claim 2, wherein the cooling structure (25) includes a cooling pump body (251), a cooling medium storage tank (252), and a transmission line (253), an output end of the cooling pump body (251) communicates with the accommodation space through the transmission line (253), and an input end of the cooling pump body (251) communicates with the cooling medium storage tank (252).

4. Superconducting coil drive mechanism according to claim 1, characterized in that each of the induction coils (22) is provided with a signal transmitter (221) on the side facing the first annular panel (11), the first annular panel (11) being provided with a signal receiver (112), the signal receiver (112) receiving the signal transmitted by the signal transmitter (221) for detecting the real-time position of the induction coil (22); the signal transmitter (221) is a laser transmitter, and the signal receiver (112) is a laser receiver.

5. A heading machine cutterhead, characterized in that the heading machine cutterhead comprises a cutterhead main body (31) and a superconducting coil driving mechanism, wherein the superconducting coil driving mechanism is as claimed in any one of claims 1 to 4, and the cutterhead main body (31) is fixedly connected to one side, far away from the first annular panel (11), of a second annular panel (21) of the superconducting coil driving mechanism.

6. A hard rock tunnel boring machine, comprising a boring machine cutterhead according to claim 5.