阅读说明：本技术 一种竖井掘进机 (Shaft heading machine ) 是由 刘飞香 程永亮 刘在政 李德平 彭正阳 李政 祝欣然 张明明 文中保 马海成 杨 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种竖井掘进机,包括：中心刀盘和外圈刀盘,外圈刀盘可移动的套设于中心刀盘的外圈；中心驱动机构和外圈驱动机构,分别用于连接中心刀盘和外圈刀盘,并驱动其转动；中心驱动机构通过可伸缩的中心驱动推进机构连接于盾体,外圈驱动机构连接于盾体。本发明提供的竖井掘进机包括可移动的嵌套设置的中心刀盘和外圈刀盘,二者通过中心驱动机构和外圈驱动机构分别驱动,中心驱动机构通过中心驱动推进机构连接于盾体,中心驱动推进机构为伸缩推进机构,可以通过伸缩推动中心驱动机构相对于盾体移动。本申请所提供的竖井掘进机通过实现步履式的掘进状态,从而提升竖井掘进机的工作效率。(The invention discloses a shaft heading machine, comprising: the outer ring cutterhead is movably sleeved on the outer ring of the central cutterhead; the central driving mechanism and the outer ring driving mechanism are respectively used for connecting the central cutter head and the outer ring cutter head and driving the central cutter head and the outer ring cutter head to rotate; the central driving mechanism is connected to the shield body through a telescopic central driving propulsion mechanism, and the outer ring driving mechanism is connected to the shield body. The shaft boring machine provided by the invention comprises a center cutter head and an outer ring cutter head which are movably nested, the center cutter head and the outer ring cutter head are respectively driven by a center driving mechanism and an outer ring driving mechanism, the center driving mechanism is connected to a shield body by a center driving propelling mechanism, the center driving propelling mechanism is a telescopic propelling mechanism, and the center driving mechanism can be driven to move relative to the shield body by telescopic propelling. The shaft heading machine provided by the application can improve the working efficiency of the shaft heading machine by realizing the walking heading state.)

1. A shaft boring machine, comprising:

the cutter comprises a central cutter head (1) and an outer ring cutter head (2), wherein the outer ring cutter head (2) is movably sleeved on the outer ring of the central cutter head (1);

the central driving mechanism (4) and the outer ring driving mechanism (5) are respectively used for connecting the central cutter head (1) and the outer ring cutter head (2) and driving the central cutter head and the outer ring cutter head to rotate; the central driving mechanism (4) is connected to the shield body through a telescopic central driving propelling mechanism (13), and the outer ring driving mechanism (5) is connected to the shield body.

2. A shaft boring machine according to claim 1, further comprising a main propulsion mechanism (6) mounted on the shield for applying a thrust force to the segments (9) to move the shield.

3. The shaft boring machine according to claim 2, further comprising a control device for controlling the elongation of the center drive advancing mechanism (13) and the operation of one of the center drive mechanism (4) and the outer ring drive mechanism (5) so that one of the center cutter head (1) and the outer ring cutter head (2) is supported while the other is boring;

the control device is also used for controlling the main propelling mechanism (6), the central driving mechanism (4) and the outer ring driving mechanism (5) to work while controlling the central driving propelling mechanism (13) to stop stretching.

4. A shaft boring machine according to any one of claims 1 to 3, wherein the shield body comprises: the central driving mechanism comprises a front shield (3) and a middle shield (8), wherein the outer ring cutter head (2) is connected to the front shield (3), and two ends of a central driving propelling machine (13) are respectively connected to the middle shield (8) and the central driving mechanism;

the main propelling mechanism (6) is arranged on the middle shield (8), one end of the main propelling mechanism in the telescopic direction is connected to the front shield (3), and the other end of the main propelling mechanism pushes the duct piece (9).

5. The shaft boring machine according to claim 4, wherein the front shield (3) is provided with an outer ring cutter head slurry inlet pipe (7) which is connected with the region where the outer ring cutter head (2) is located and the region where the middle shield (8) is located and is used for injecting slurry into the front part of the outer ring cutter head (2);

the front shield (3) is further provided with an outer ring cutter head slurry discharge pipe (16) which is connected with the outer ring cutter head region where the outer ring cutter head (2) is located and the middle shield (8) is located and used for discharging slurry of the outer ring cutter head (2).

6. The shaft boring machine according to claim 5, wherein a center cutter head slurry inlet pipe (14) connecting a region where the center cutter head (1) is located and a region where the middle shield (8) is located is installed at a side portion of the center driving mechanism (4) for injecting slurry to a front portion of the center cutter head (1);

the side of the central driving mechanism (4) is also provided with a central cutter head pulp discharge pipe (15) which is connected with the region where the central cutter head (1) is located and the region where the middle shield (8) is located and is used for discharging the mud of the central cutter head (1).

7. The shaft boring machine according to claim 6, wherein at least one of the outer ring cutterhead slurry inlet pipe (7), the outer ring cutterhead slurry discharge pipe (16), the center cutterhead slurry inlet pipe (14) and the center cutterhead slurry discharge pipe (15) is provided with a power mechanism for driving slurry to flow.

8. Shaft boring machine according to claim 4, characterised in that the front shield (3) is provided with at least two outer ring drives (5) for driving the outer ring cutterhead (2) in operation.

9. Shaft boring machine according to claim 4, characterised in that the central shield (8) is provided with segment splicing means (10) for segment splicing and lifting means (11) for connecting hoisting equipment.

10. A shaft boring machine according to any one of claims 1 to 3, characterised in that the central drive (4) and the outer ring drive (5) are nested and have slides at their contact points to facilitate their relative sliding movement.

Technical Field

The invention relates to the technical field of heading machines, in particular to a vertical shaft heading machine.

Background

Existing heading machines are classified into a horizontal heading machine and a shaft heading machine, and the horizontal heading machine generally includes the following conditions. The primary shield and the secondary shield are two independent shield machines, after the primary shield finishes tunneling, the secondary shield starts tunneling in the primary shield, the secondary shield is independent equipment relative to the primary shield, and the primary shield and the secondary shield are only used on the shield tunneling machine which horizontally tunnels at present. The large-diameter double-cutter shield machine is provided with inner and outer cutter heads, a main driving structure of the large-diameter double-cutter shield machine and a shield body are integrated, the double-cutter shield machine is integrally pushed by a thrust cylinder to tunnel, and the double-cutter shield machine is only a horizontal tunneling shield machine at present.

The structure can not be used on a vertical shaft shield tunneling machine, the vertical shaft shield tunneling machine generally comprises a lifting mechanism, a propulsion system, a cutter head, a main drive and a segment assembling mechanism, the vertical shaft tunneling machine integrally lifts the shield tunneling machine through the lifting mechanism, and the propulsion mechanism slowly propels the main drive and the cutter head tunneling.

Moreover, because the integral cutter head of the existing shaft tunneling machine is large in rotating diameter of the cutter head generally, when the rotating speed of the cutter head is fixed, the linear velocity of the central position of the cutter head is lower, the linear velocity of the central position far away from the cutter head is relatively higher, and when a shaft shield adopts slurry circulation to remove slag, the linear velocity of the central area of the cutter head is lower, so that the stirring in a soil bin is not facilitated, the slag removal is not smooth, pipelines are blocked and the like.

The existing shaft heading machine adopts a conical cutter head, solid particles in slurry settle downwards under the action of gravity of the muck, so that the muck is accumulated at the bottom of the cutter head, and a mud circulation system cannot carry the muck out.

In summary, how to provide a shaft heading machine with high heading efficiency suitable for shaft operation is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a shaft boring machine having high boring efficiency.

In order to achieve the above purpose, the invention provides the following technical scheme:

a shaft boring machine comprising:

the outer ring cutter head is movably sleeved on the outer ring of the central cutter head;

the central driving mechanism and the outer ring driving mechanism are respectively used for connecting the central cutter head and the outer ring cutter head and driving the central cutter head and the outer ring cutter head to rotate; the central driving mechanism is connected to the shield body through a telescopic central driving and pushing mechanism, and the outer ring driving mechanism is connected to the shield body.

Preferably, the device further comprises a main propulsion mechanism which is arranged on the shield body and used for applying thrust to the segment so as to move the shield body.

Preferably, the device further comprises a control device, wherein the control device is used for controlling the central driving propulsion mechanism to extend and controlling one of the central driving mechanism and the outer ring driving mechanism to work so that one of the central cutterhead and the outer ring cutterhead can carry out tunneling and the other can carry out supporting;

the control device is also used for controlling the main propelling mechanism, the central driving mechanism and the outer ring driving mechanism to work while controlling the central driving propelling mechanism to stop stretching.

Preferably, the shield body comprises: the outer ring cutter head is connected to the front shield, and two ends of the central driving propelling machine are respectively connected to the middle shield and the central driving mechanism;

the main propelling mechanism is arranged on the middle shield, one end of the main propelling mechanism in the telescopic direction is connected to the front shield, and the other end of the main propelling mechanism is used for propelling the pipe sheet.

Preferably, the front shield is provided with an outer ring cutter head slurry inlet pipe which is connected with the area where the outer ring cutter head is located and the area where the middle shield is located and is used for injecting slurry into the front part of the outer ring cutter head;

and the front shield is also provided with an outer ring cutter head slurry discharge pipe which is connected with the area of the outer ring cutter head and the area of the middle shield and is used for discharging the slurry of the outer ring cutter head.

Preferably, a central cutter head slurry inlet pipe which is connected with a region where the central cutter head is located and a region where the middle shield is located is installed on the side portion of the central driving mechanism and used for injecting slurry into the front portion of the central cutter head;

and a central cutter head slurry discharge pipe which is connected with the area where the central cutter head is located and the area where the middle shield is located is further installed on the side part of the central driving mechanism and used for discharging slurry of the central cutter head part.

Preferably, at least one of the outer ring cutter head slurry inlet pipe, the outer ring cutter head slurry discharge pipe, the central cutter head slurry inlet pipe and the central cutter head slurry discharge pipe is provided with a power mechanism for driving slurry to flow.

Preferably, the front shield is provided with at least two outer ring driving mechanisms for driving the outer ring cutterhead to work.

Preferably, the middle shield is provided with a segment assembling mechanism for assembling segments and a lifting mechanism for connecting lifting equipment.

Preferably, the central driving mechanism and the outer ring driving mechanism are nested, and a slideway facilitating relative sliding of the central driving mechanism and the outer ring driving mechanism is arranged at the contact position of the central driving mechanism and the outer ring driving mechanism.

The invention provides a shaft boring machine which comprises a center cutter head and an outer ring cutter head which are movably nested, wherein the center cutter head and the outer ring cutter head are respectively driven by a center driving mechanism and an outer ring driving mechanism, the center driving mechanism is connected to a shield body by a center driving propelling mechanism, the center driving propelling mechanism is a telescopic propelling mechanism, and the center driving mechanism can be pushed to move relative to the shield body by stretching, so that one of the center cutter head and the outer ring cutter head is used as a fixed supporting structure, and the other one of the center cutter head and the outer ring cutter head excavates and alternately carries out, thereby realizing a walking type boring.

The shaft heading machine provided by the application can improve the working efficiency of the shaft heading machine by realizing the walking heading state.

In a further preferred scheme, the device further comprises a main propelling mechanism which is arranged on the shield body and used for applying a propelling force to the segment to move the shield body. When the control center drives the propelling mechanism to stop stretching, the central driving mechanism and the outer ring driving mechanism arranged on the shield body can be relatively fixed, at the moment, the main propelling mechanism drives the shield body to move relative to the duct piece, namely, the central cutter head and the outer ring cutter head connected to the shield body are driven to simultaneously tunnel, and therefore the synchronous tunneling state of the central cutter head and the outer ring cutter head is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a cross-sectional view of a vertical shaft boring machine with a center cutter head and an outer ring cutter head in parallel according to the present invention;

fig. 2 is a sectional view showing a walking type tunneling state of the shaft boring machine according to the present invention.

In FIGS. 1-2:

1-a central cutter head, 2-an outer ring cutter head, 3-a front shield, 4-a central driving mechanism, 5-an outer ring driving mechanism, 6-a main propelling mechanism, 7-an outer ring cutter head slurry inlet pipe, 8-a middle shield, 9-a duct piece and 10-a duct piece assembling mechanism;

11-lifting mechanism, 12-shield tail, 13-central driving propelling mechanism;

14-a central cutter head pulp inlet pipe, 15-a central cutter head pulp discharge pipe and 16-an outer ring cutter head pulp discharge pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide the vertical shaft tunneling machine which has high tunneling efficiency.

Referring to fig. 1 and 2, fig. 1 is a sectional view illustrating a synchronous driving state of a shaft boring machine according to the present invention; fig. 2 is a sectional view showing a walking type tunneling state of the shaft boring machine according to the present invention.

The application provides a shaft heading machine, including center blade disc 1, outer lane blade disc 2, central actuating mechanism 4 and outer lane actuating mechanism 5.

The outer ring cutter head 2 is movably sleeved on the outer ring of the central cutter head 1; the central driving mechanism 4 and the outer ring driving mechanism 5 are respectively used for connecting the central cutter head 1 and the outer ring cutter head 2 and driving the same to rotate; the central driving mechanism 4 is connected to the shield body through a central driving and propelling mechanism 13, and the outer ring driving mechanism 5 is connected to the shield body.

It should be noted that the central cutter head 1 and the outer ring cutter head 2 are two cutter heads which are nested, both are rotary tunneling cutter heads, both rotate around an axis when working, and the outer ring cutter head 2 is nested outside the central cutter head 1, has a gap, and can relatively move in the axial direction, so that the two can relatively move or retract in the tunneling direction.

The central cutter head 1 and the outer ring cutter head 2 are controlled to work by different driving mechanisms respectively.

The outer ring driving mechanism 5 drives the outer ring cutter head 2 to rotate, and the outer ring driving mechanism 5 is connected to the shield body. The central driving mechanism 4 drives the central cutter head 1 to rotate, the central driving mechanism 4 is connected to the shield body through the telescopic central driving and propelling mechanism 13, and the telescopic central driving and propelling mechanism 13 can control the distance between the central driving mechanism 4 and the shield body so that the central driving mechanism 4 moves relative to the outer ring driving mechanism 13.

In the shaft boring machine, the cutter head is used for directly boring the excavation face downwards, and the control center can drive the propelling mechanism 13 to stretch, so that the central cutter head 1 and the outer ring cutter head 2 can move relatively. When the excavating device is used, one of the central driving mechanism 4 and the outer ring driving mechanism 5 can be controlled to work so as to ensure that the central cutterhead 1 or the outer ring cutterhead 2 corresponding to the work carries out rotary excavation, and the other one does not work and can be supported on a tunnel face so as to provide supporting counter force for the working cutterhead. For example, the outer ring driving mechanism 5 is controlled to be closed or stationary, so that the outer ring cutterhead 2 is in a standing state and abuts against the tunnel face, the center driving mechanism 4 is controlled to operate, so that the center cutterhead 1 keeps a rotating state, and the center driving pushing mechanism 13 extends outwards to drive the center cutterhead 1 to move towards the tunnel face so as to move downwards to dig while the center cutterhead 1 rotates.

The invention provides a shaft boring machine which comprises a center cutter head and an outer ring cutter head which are movably nested, wherein the center cutter head and the outer ring cutter head are respectively driven by a center driving mechanism and an outer ring driving mechanism, the center driving mechanism is connected to a shield body by a center driving propelling mechanism, the center driving propelling mechanism is a telescopic propelling mechanism, and the center driving mechanism can be pushed to move relative to the shield body by stretching, so that one of the center cutter head and the outer ring cutter head is used as a fixed supporting structure, and the other one of the center cutter head and the outer ring cutter head excavates and alternately carries out, thereby realizing a walking type boring.

The shaft heading machine provided by the application can improve the working efficiency of the shaft heading machine by realizing the walking heading state.

On the basis of the above embodiment, the device further comprises a main propulsion mechanism 6, which is mounted on the shield body and is used for applying a thrust to the segment 9 to move the shield body.

It should be noted that the main propulsion mechanism 6 is installed on the shield structure, the main propulsion mechanism 6 includes an oil cylinder, an installed segment 9 structure is arranged in the telescopic moving direction of the oil cylinder, the segment 9 is installed on the excavated rock wall, the shield can be pushed to a position far away from the segment 9 by the extension of the main propulsion mechanism 6, it should be noted that, in general, in the process of downward tunneling, the direction needs to be adjusted, and the downward tunneling direction can be accurate by applying an acting force to the segment 9.

In addition, the main propelling mechanism 6 for propelling the shield body to move is arranged, so that the shield body can be propelled to move integrally, the central driving propelling mechanism 13 can be controlled to stop stretching and retracting and keep a fixed length simultaneously, the central cutter head 1 and the outer ring cutter head 2 are relatively fixed, and the central cutter head 1, the outer ring cutter head 2 and the corresponding central driving mechanism 4 and the corresponding outer ring driving mechanism 5 can be propelled towards the lower part simultaneously through the main propelling mechanism 6.

On the basis of the above embodiment, the device further comprises a control device, wherein the control device is used for controlling the central driving propulsion mechanism 13 to extend and controlling one of the central driving mechanism 4 and the outer ring driving mechanism 5 to work, so that one of the central cutterhead 1 and the outer ring cutterhead 2 carries out tunneling and the other carries out supporting;

the control device is also used for controlling the main propulsion mechanism 6, the central driving mechanism 4 and the outer ring driving mechanism 5 to work while controlling the central driving propulsion mechanism 13 to stop extending and contracting.

It should be noted that the control device may be a central control device of the shaft boring machine, all the devices and components of the shaft boring machine may be connected to the control device, and the control device may be various types of control devices such as a chip, a controller, or a computer.

The control device is used for controlling the structure to realize walking type tunneling and synchronous type tunneling.

Specifically, in the control process, the control device is used for controlling the central driving propulsion mechanism 13 to extend and controlling one of the central driving mechanism 4 and the outer ring driving mechanism 5 to work, namely, walking tunneling. Specifically, the control device controls the central driving and propelling mechanism 13 to be in a retractable state, i.e. an unfixed state, and at the same time, the control device controls one of the central driving mechanism 4 and the outer ring driving mechanism 5 to operate, taking the control of the central outer ring driving mechanism 5 as an example, the central driving mechanism 4 is relatively static and enables the central cutter head 1 to abut against a tunnel face, the control device controls the central driving and propelling mechanism 13 to be shortened, so as to drive the outer ring cutter head 2 and the outer ring driving mechanism 5 to have a downward movement trend, and as the outer ring driving mechanism 5 operates, the outer ring cutter head 2 can move downward while rotating. After moving a certain distance downwards, the outer ring part is excavated for a certain distance, then the central driving propulsion mechanism 13 can be controlled to stop contracting, meanwhile, the control device controls the outer ring driving mechanism 5 to stop working, at the moment, the outer ring cutterhead 2 contacts the tunnel face, and the central driving mechanism 4 is controlled to work while the central driving propulsion mechanism 13 is controlled to extend, so that the central driving mechanism 4 is driven to move downwards while the central driving mechanism 4 rotates. And repeatedly operating the two states to obtain the walking type tunneling.

And the control center drives the propulsion mechanism 13 to stop extending and retracting and controls the main propulsion mechanism 6, the center driving mechanism 4 and the outer ring driving mechanism 5 to work at the same time, namely synchronous tunneling. Specifically, the control device controls the central driving propulsion mechanism 13 to stop extending and contracting, namely, a fixed-length structure is formed, the relative positions of the central cutter head 1 and the outer ring cutter head 2 are fixed, and the relative positions of the central driving mechanism 4 and the outer ring driving mechanism 5 are also fixed. At the moment, the center tunneling and the outer ring tunneling are integrated, the shield body moves forwards in the direction away from the duct piece 9, namely moves downwards by controlling the extension of the main propulsion mechanism 6, and therefore the center driving mechanism 4 and the outer ring driving mechanism 5 which are connected with the shield body, the center cutter head 1 and the outer ring cutter head 2 all move downwards, and the synchronous tunneling is formed.

On the basis of the above embodiment, the shield includes: the central driving propelling machine comprises a front shield 3, a middle shield 8, an outer ring cutter head 2 connected with the front shield 3, and a central driving propelling machine 13, wherein two ends of the central driving propelling machine are respectively connected with the middle shield 8 and a central driving mechanism; the main propulsion mechanism 6 is installed on the middle shield 8, and one end of the main propulsion mechanism in the telescopic direction is connected to the front shield 3, and the other end of the main propulsion mechanism pushes the duct piece 9.

On the basis of the above embodiment, the front shield 3 is provided with an outer ring cutter head slurry inlet pipe 7 which is connected with the region where the outer ring cutter head 2 is located and the region where the middle shield 8 is located, and is used for injecting slurry into the front part of the outer ring cutter head 2;

the front shield 3 is also provided with an outer ring cutter head slurry discharge pipe 16 which is connected with the area where the outer ring cutter head 2 is located and the area where the middle shield 8 is located and is used for discharging partial slurry of the outer ring cutter head 2.

Referring to fig. 2, the outer cutter head slurry inlet pipe 7 and the outer cutter head slurry outlet pipe 16 are respectively connected to the front and rear spaces of the front shield 3 and are respectively used for realizing the movement of slurry from the front of the front shield 3 to the rear of the front shield 3 and from the rear of the front shield 3 to the front of the front shield 3.

On the basis of any one of the above embodiments, the side of the central driving mechanism 4 is provided with a central cutterhead slurry inlet pipe 14 which is connected with the area where the central cutterhead 1 is located and the area where the middle shield 8 is located and is used for injecting slurry into the front part of the central cutterhead 1;

and a central cutter head slurry discharge pipe 15 connected with the area where the central cutter head 1 is located and the area where the middle shield 8 is located is further arranged on the side part of the central driving mechanism 4 and used for discharging partial slurry of the central cutter head 1.

In consideration of smoothness of slurry flow, a power mechanism can be used for driving slurry to flow and pump, and at least one of the outer ring cutter head slurry inlet pipe 7, the outer ring cutter head slurry discharge pipe 16, the central cutter head slurry inlet pipe 14 and the central cutter head slurry discharge pipe 15 is provided with the power mechanism for driving slurry to flow.

On the basis of the above embodiment, the front shield 3 is provided with at least two outer ring driving mechanisms 5 for driving the outer ring cutter head 2 to work.

Referring to fig. 1 and 2, two or more driving outer ring cutterheads 2 are provided on an annular front shield 3.

Preferably, the driving outer ring cutterhead 2 is uniformly arranged along the circumferential direction.

Preferably, the middle shield 8 is provided with a segment assembling mechanism 10 for segment assembling and a lifting mechanism 11 for connecting a lifting device.

It should be noted that the shield body further includes a shield tail 12, please refer to fig. 1 and 2, wherein the shield tail is located at the side of the segment 9.

It should be noted that the "front" and "rear" provided in the present application both refer to the front and rear in the heading direction.

On the basis of any one of the above embodiments, the central driving mechanism 4 and the outer ring driving mechanism 5 are nested, and the contact position of the two is provided with a slideway facilitating the relative sliding of the two.

Referring to fig. 1 and 2, the central driving mechanism 4 may include a central main body, and a central driving member disposed on the central main body, and the central driving member is connected to the central cutter 1 to drive the central cutter 1 to rotate. The outer ring driving mechanism 5 may include an outer ring main body portion and an outer ring driving member disposed on the outer ring main body portion, and the outer ring driving member is connected to the outer ring cutter head 2 to drive the outer ring cutter head 2 to rotate.

The central main body part and the outer ring main body part are nested, and a sliding rail or a sliding way is arranged on a contact surface where the central main body part and the outer ring main body part are nested and contacted, so that the central main body part and the outer ring main body part can move relatively in the axial direction.

Alternatively, the central main body portion may be disc-shaped, and the outer ring main body portion may be ring-shaped.

The invention aims at inventing a shaft boring machine, wherein a cutter head comprises an inner cutter head, an outer cutter head and an inner drive and an outer drive, a central drive mechanism 4 positioned in the inner drives an inner central cutter head 1, and the central drive mechanism 4 and an outer ring drive mechanism 5 are installed in a matching way.

The shield machine of the invention is shown in attached figures 1 and 2. The shaft shield machine can realize two modes of inner and outer ring cutterhead walking type tunneling and inner and outer cutterheads synchronous tunneling.

Wherein, the walking type tunneling mainly comprises the following steps:

the shield body and the main propulsion mechanism 6 are kept static under the action of the shaft hoisting mechanism, and the outer ring cutter head 2 directly acts on the tunnel face;

the central cutterhead 1 rotates under the action of the central driving mechanism 4, and the central driving mechanism 4 moves downwards under the action of the central driving propulsion system 13 to realize integral rotary tunneling.

After the central cutter head 1 tunnels downwards for a distance, the central driving and propelling mechanism 13 stops stretching, the outer ring driving mechanism 5 controls the outer ring cutter head 2 to start tunneling, and in the tunneling process of the outer ring cutter head 2, the state of the central cutter head 1 can have the following states: the central cutterhead 1 can be kept relatively static with the tunnel face, or the central cutterhead 1 does not dig in and only rotates in place.

Wherein, synchronous tunnelling mainly includes the following steps:

the central driving and propelling mechanism 13 is locked, so that the central driving mechanism 4 and the central cutter head 1 are kept relatively still with the shield body and the outer ring driving mechanism 5;

the main propulsion mechanism 6 applies acting force to the duct piece 9 to realize the propulsion of the shield body towards the tunneling direction, and in the mode, the rotation directions of the central cutterhead 1 and the outer ring cutterhead 2 can be the same or different, namely, the tunneling can be carried out through the rotation in the same direction, and the tunneling can also be carried out in two rotation directions.

In addition to the main structure of the shaft boring machine provided in the above embodiments, the structure of other parts of the shaft boring machine is referred to the prior art, and will not be described herein again.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The shaft boring machine provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.