Reducing heading machine

Abstract

The invention provides a reducing heading machine, and belongs to the technical field of shield tunneling machines. Comprising a first shield body, a second shield body, a first propelling system, a second propelling system and a spiral conveyor. The first shield body comprises a first fixed block assembly and a bottom block, the second shield body comprises a second fixed block assembly, and when tunneling of a first diameter is carried out, the bottom block and the first fixed block assembly are matched with each other to form the complete first shield body; the first shield body and the first propelling system are matched with each other to carry out supporting and propelling work; and when tunneling of a second diameter is carried out, the driving oil cylinder drives the bottom block to move to the second shield body, the bottom block and the second fixed block assembly are matched with each other to form the complete second shield body, and the second shield body and the second propelling system are matched with each other to carry out supporting and propelling work. And it is guaranteed that the spiral conveyor can synchronously move by moving the bottom block to the second shield body, and therefore the defects in the prior art are effectively overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machines and relates to a variable-diameter tunneling machine. Background Art

[0002] In recent years, with the increasing number of urban subways and water diversion shield tunnels, the stations of subway section tunnels are expanded on the basis of shield tunnels. The expansion of stations is generally done by manual / mechanical excavation, which will occupy a large amount of ground resources in the process, affecting normal urban traffic and, to a certain extent, the progress of project construction. Therefore, variable-diameter shield machines have received more application demands. When variable-diameter shield machines are used for tunnel construction, the variable-diameter shield machines are often complex in structure and difficult to operate. Summary of the invention

[0003] Based on the technical defects currently existing in the prior art, the present invention proposes a variable diameter tunnel boring machine, which aims to solve the problem that station excavation and mainline tunnel construction excavation cannot be carried out continuously, and to accelerate the construction efficiency of the variable diameter tunnel to a certain extent.

[0004] The present invention provides a variable diameter tunneling machine, a variable diameter tunneling machine comprising a first shield body, a second shield body, a first propulsion system, a second propulsion system and a screw conveyor;

[0005] The first shield body includes a first fixed block assembly and a bottom block, the second shield body includes a second fixed block assembly, the bottom block is displaced by driving a driving cylinder, one end of the driving cylinder is connected to the pipe segment, and the other end of the driving cylinder is connected to the bottom block,

[0006] When excavating a tunnel of the first diameter, the bottom block and the first fixed block assembly cooperate with each other to form a complete first shield body, and the first shield body and the first propulsion system cooperate with each other to perform support and propulsion work;

[0007] When excavating a tunnel of the second diameter, the driving cylinder drives the bottom block to move to the second shield body, and the bottom block cooperates with the second fixed block assembly to form a complete second shield body, and the second shield body and the second propulsion system cooperate with each other to perform support and propulsion work;

[0008] The screw conveyor is used to transport slag; the bottom block of the first shield body includes the interface part of the screw conveyor.

[0009] Furthermore, the first fixed block component is configured as a block structure, and the second fixed block component is configured as a block structure.

[0010] Furthermore, the first fixed block assembly includes a first left side block, a first right side block and a first top block; the first top block and the bottom block are symmetrically arranged along the center position of the first shield body; the first left side block is provided with a plurality of pieces connected in sequence, and the plurality of first left side blocks are connected in sequence to form a first left side shield body portion, and the two sides of the first left side shield body portion are respectively connected to the corresponding ends of the first top block and the bottom block; the first right side block is provided with a plurality of pieces connected in sequence, and the plurality of first right side blocks are connected in sequence to form a first right side shield body portion, and the two sides of the first right side shield body portion are respectively connected to the corresponding other ends of the first top block and the bottom block; the first top block, the bottom block, the first left side shield body portion and the first right side shield body portion are connected to each other to form a complete first shield body.

[0011] Furthermore, the first propulsion system includes a plurality of first propulsion cylinders spaced apart from each other along the inner side surface of the first shield body, one end of each of the plurality of first propulsion cylinders is connected to the pipe segment, and the other ends of the plurality of first propulsion cylinders are respectively connected to the first side block, the first top block and the bottom block.

[0012] Furthermore, the second fixed block assembly includes a second left-side block, a second right-side block and a second top block, the second left-side block is provided with a plurality of pieces connected in sequence, the plurality of second left-side blocks are connected in sequence to form a second left-side shield body, one side of the second left-side shield body is connected to one end of the second top block; the second right-side block is provided with a plurality of pieces connected in sequence, the plurality of second right-side blocks are connected in sequence to form a second right-side shield body, one side of the second right-side shield body is connected to the other end of the second top block; the second left-side shield body and the second right-side shield body are arranged opposite to one end of the second top block away and are spaced apart from each other by a space for installing the bottom block.

[0013] Furthermore, the second propulsion system includes a plurality of second propulsion cylinders spaced apart from each other along the inner side surface of the second shield body, one end of each of the plurality of second propulsion cylinders is connected to the outer end surface of the first shield body, and the other end of each of the second propulsion cylinders is connected to the inner side surface of the second shield body.

[0014] Furthermore, a first adjusting oil cylinder and a second adjusting oil cylinder are respectively provided on the second left shield body portion and the second right shield body portion.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention, while satisfying the first diameter excavation, detachably installs a passable second shield body on the first shield body used to satisfy the first diameter excavation, and ensures that the screw conveyor can be synchronously displaced by displacing the bottom block in the first shield body to the second shield body, thereby effectively solving the deficiencies in the prior art (specifically, when the station of the subway section tunnel is expanded on the basis of the shield tunnel, manual labor / machinery other than the tunnel boring machine is required to expand the excavation, resulting in the technical problem of occupying a large amount of ground resources, affecting normal urban traffic, and to a certain extent affecting the progress of the project construction), and solving the problems of complex structure and difficult diameter changing operation of the variable diameter tunnel boring machine in the prior art.

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

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

[0019] Figure 1 It is a schematic diagram of the overall structure of a variable diameter tunnel boring machine in an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure when the midsole block and the second shield body are connected to each other;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the large block in the middle and lower sides.

[0022] in:

[0023] 1. The first shield body, 101. The bottom block, 2. The second shield body, 201. The second left shield body, 2011. The first adjustment cylinder, 3. The first propulsion system, 4. The second propulsion system, 5. The screw conveyor. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more clear and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings of the present invention are all simplified and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the implementation of the present invention; the "number" mentioned in the present invention is not limited to the specific number in the examples in the accompanying drawings; the directions or positional relationships indicated by "front", "middle", "back", "left", "right", "up", "down", "top", "bottom", "middle", etc. mentioned in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor can they be understood as limitations on the present invention.

[0025] Example:

[0026] See also Figures 1 to 3 As shown, a variable diameter tunnel boring machine provided by the present invention comprises a first shield body 1, a second shield body 2, a first propulsion system 3, a second propulsion system 4, and a screw conveyor 5;

[0027] When excavating a tunnel of the first diameter, the first shield 1 and the first propulsion system 3 cooperate with each other to perform support and propulsion work;

[0028] When excavating a tunnel of the second diameter, the second shield 2 and the second propulsion system 4 cooperate with each other to perform support and propulsion work;

[0029] The screw conveyor 5 is used to transport the slag; the bottom block 101 of the first shield body 1 includes the interface part of the screw conveyor 5 .

[0030] Preferably, other structures of the variable diameter tunnel boring machine are all prior arts.

[0031] Further, the first shield body 1 is configured as a block structure, specifically including a first left partial block, a first right partial block, a first top partial block and a bottom partial block 101; the first top partial block and the bottom partial block 101 are symmetrically arranged along the center position of the first shield body 1; the first left partial block is provided with a plurality of pieces connected in sequence, and the plurality of first left partial blocks are connected in sequence to form a first left shield body portion, and the two sides of the first left shield body portion are respectively connected to the first top partial block and the bottom partial block 101 corresponding to one end; the first right partial block is provided with a plurality of pieces connected in sequence, and the plurality of first right partial blocks are connected in sequence to form a first right shield body portion, and the two sides of the first right shield body portion are respectively connected to the first top partial block and the bottom partial block 101 corresponding to the other end; the first top partial block, the bottom partial block 101, the first left shield body portion and the first right shield body portion are connected to each other to form a complete first shield body 1.

[0032] The first propulsion system 3 includes a plurality of first propulsion cylinders spaced apart from each other along the inner side surface of the first shield body 1, one ends of the plurality of first propulsion cylinders are connected to the pipe segments, and the other ends of the plurality of first propulsion cylinders are respectively connected to the first side block, the first top block and the bottom block 101, for pushing the first shield body 1 to advance, so as to realize the excavation of the first shield body 1.

[0033] Furthermore, the second shield body 2 is configured as a block structure, specifically including a second left partial block, a second right partial block and a second top partial block, the second left partial block is provided with a plurality of pieces connected in sequence, the plurality of second left partial blocks are connected in sequence to form a second left shield body portion 201, one side of the second left shield body portion 201 is connected to one end of the second top partial block; the second right partial block is provided with a plurality of pieces connected in sequence, the plurality of second right partial blocks are connected in sequence to form a second right shield body portion, one side of the second right shield body portion is connected to the other end of the second top partial block; the second left shield body portion 201 is arranged opposite to an end of the second right shield body portion away from the second top partial block and there is a space between them for installing the bottom partial block 101.

[0034] The second propulsion system 4 includes a plurality of second propulsion cylinders spaced apart from each other along the inner side surface of the second shield body 2, one end of each of the plurality of second propulsion cylinders is connected to the outer end surface of the first shield body 1, and the other end of each of the second propulsion cylinders is connected to the inner side surface of the second shield body 2, for moving the second shield body 2 for propulsion, so as to realize excavation of the second shield body 2.

[0035] Furthermore, the variable diameter tunnel boring machine also includes a driving cylinder for driving the bottom block 101 to move, one end of the driving cylinder is connected to the pipe segment, and the other end of the driving cylinder is connected to the bottom block 101, and is used to drive the bottom block 101 to move to the second shield body 2 or retract to the first shield body 1.

[0036] Furthermore, a first adjustment cylinder 2011 and a second adjustment cylinder are respectively provided on the second left shield body 201 and the second right shield body, so as to fine-tune the positions of the second left shield body 201 and the second right shield body.

[0037] Preferably, the first adjustment cylinder 2011 and the second adjustment cylinder can also be used to respectively open the second left shield body 201 and the second right shield body in a direction of separation by a certain angle (preferably set to 5°-10°), so that the bottom block 101 can be smoothly inserted between the second left shield body 201 and the second right shield body. Specifically, when the bottom block 101 needs to extend to the second shield body 2, the first adjustment cylinder 2011 and the second adjustment cylinder respectively drive the second left shield body 201 and the second right shield body to open a certain angle (preferably set to 5°-10°) in a direction of separation, and the bottom block 101 is displaced to the second shield body 2 under the drive of the driving cylinder, and the first adjustment cylinder 2011 and the second adjustment cylinder then drive the second left shield body 201 and the second right shield body to reset.

[0038] When the first shield body 1 is used for excavation, the driving cylinder is in a retracted state, and the bottom block 101 is connected with the first top block, the first left shield body part, and the first right shield body part to form a complete first shield body 1; and at this time, the second shield body 1 is in a disassembled state (that is, the second shield body 2 and the second propulsion system 4 have not yet been installed);

[0039] When it is necessary to convert the first shield body 1 into the second shield body 2, several second left side blocks, several second right side blocks, second top blocks, and multiple second propulsion cylinders are transported to corresponding installation positions respectively; the second shield body 2 and the second propulsion system 4 are installed respectively; the driving cylinder is then started to push the bottom block 101 to the corresponding position of the second shield body 2, and the bottom block 101 and the second shield body 2 are connected to each other so that the second shield body 2 forms a complete shield structure, and the operation of converting the variable diameter tunnel boring machine from a small diameter to a large diameter is completed;

[0040] When it is necessary to convert from the second shield body 2 to the first shield body 1, the second shield body 2 and the second propulsion system 4 are removed respectively, and then the driving cylinder is started to retract the bottom block 101 to the first shield body 1 to complete the operation of converting the variable diameter tunnel boring machine from a large diameter to a small diameter.

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

Claims

1. A variable diameter tunnel boring machine, characterized in that: It comprises a first shield body (1), a second shield body (2), a first propulsion system (3), a second propulsion system (4) and a screw conveyor (5); The first shield body (1) comprises a first fixed block assembly and a bottom block (101); the second shield body (2) comprises a second fixed block assembly; the bottom block (101) is displaced by driving a driving cylinder; one end of the driving cylinder is connected to the pipe segment, and the other end of the driving cylinder is connected to the bottom block (101); When excavating a tunnel of the first diameter, the bottom block (101) and the first fixed block assembly cooperate with each other to form a complete first shield body (1), and the first shield body (1) and the first propulsion system (3) cooperate with each other to perform support and propulsion work; When excavating a tunnel of the second diameter, the driving cylinder drives the bottom block (101) to move to the second shield body (2), the bottom block (101) and the second fixed block assembly cooperate with each other to form a complete second shield body (2), and the second shield body (2) and the second propulsion system (4) cooperate with each other to perform support and propulsion work; The screw conveyor (5) is used to convey slag; the bottom block (101) of the first shield body (1) includes an interface portion of the screw conveyor (5).

2. The variable diameter tunnel boring machine according to claim 1, characterized in that: The first fixed block component is configured as a block structure, and the second fixed block component is configured as a block structure.

3. The variable diameter tunnel boring machine according to claim 2, characterized in that: The first fixed block assembly comprises a first left side block, a first right side block and a first top block; the first top block and the bottom block (101) are symmetrically arranged along the center position of the first shield body (1); the first left side block is provided with a plurality of pieces connected in sequence, the plurality of first left side blocks are connected in sequence to form a first left side shield body portion, and the two sides of the first left side shield body portion are respectively connected to one end of the first top block and the bottom block (101) corresponding to each other; the first right side block is provided with a plurality of pieces connected in sequence, the plurality of first right side blocks are connected in sequence to form a first right side shield body portion, and the two sides of the first right side shield body portion are respectively connected to the other end of the first top block and the bottom block (101) corresponding to each other; the first top block, the bottom block (101), the first left side shield body portion and the first right side shield body portion are connected to each other to form a complete first shield body (1).

4. The variable diameter tunnel boring machine according to claim 3, characterized in that: The first propulsion system (3) comprises a plurality of first propulsion cylinders arranged at intervals along the inner side surface of the first shield body (1), one end of each of the plurality of first propulsion cylinders being connected to the pipe segment, and the other ends of the plurality of first propulsion cylinders being respectively connected to the first side block, the first top block and the bottom block (101).

5. The variable diameter tunnel boring machine according to claim 2, characterized in that: The second fixed block assembly comprises a second left side block, a second right side block and a second top block, the second left side block is provided with a plurality of pieces connected in sequence, the plurality of second left side blocks are connected in sequence to form a second left side shield body (201), one side of the second left side shield body (201) is connected to one end of the second top block; the second right side block is provided with a plurality of pieces connected in sequence, the plurality of second right side blocks are connected in sequence to form a second right side shield body, one side of the second right side shield body is connected to the other end of the second top block; the second left side shield body (201) and the second right side shield body are arranged opposite to one end of the second top block and are spaced apart from each other by a space for mounting the bottom block (101).

6. The variable diameter tunnel boring machine according to claim 5, characterized in that: The second propulsion system (4) comprises a plurality of second propulsion cylinders arranged at intervals along the inner side surface of the second shield body (2), one end of each of the plurality of second propulsion cylinders being connected to the outer end surface of the first shield body (1), and the other end of each of the second propulsion cylinders being connected to the inner side surface of the second shield body (2).

7. The variable diameter tunnel boring machine according to claim 6, characterized in that: A first adjustment oil cylinder (2011) and a second adjustment oil cylinder are respectively provided on the second left shield body (201) and the second right shield body.

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