AU2017389721A1

AU2017389721A1 - Small-diameter kelly TBM driven by center shaft

Info

Publication number: AU2017389721A1
Application number: AU2017389721A
Authority: AU
Inventors: Xiangke NING; Weihua Yin; Xiao Zhang; Xidong ZHANG; Yufeng Zhang
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2016-12-28
Filing date: 2017-11-23
Publication date: 2019-08-15
Anticipated expiration: 2037-11-23
Also published as: AU2017389721B2; WO2018121143A1; KR102178028B1; CN106499403B; KR20190092461A; CN106499403A

Abstract

A small-diameter Kelly TBM driven by a center shaft, solving the problem that a TBM structure in the prior art does not meet the requirements for the construction of a small-diameter tunnel. The small-diameter Kelly TBM driven by a center shaft comprises a cutter head (1), a shield (2), a steel arch mounter (3), a transmission shaft (4), an inner Kelly (5), an outer Kelly (6), a shoe (7), a propulsion oil cylinder (8), a host belt conveyor (9), a back supporter (10), a driving box (11), a driving motor (12), a decelerator (13), a main bearing (14), an adapter ring (15), a clamping oil cylinder (16), and a clamping oil cylinder mounting seat (17). The driving motor, the decelerator, and the driving box of the small-diameter Kelly TBM driven by a center shaft are provided on the tail portion of the inner Kelly, such that the length of the shield can be reduced, surrounding rocks can be supported and protected in time, and meanwhile, the center of mass of the host can be moved backward, facilitating the stability of the host, and preventing the TBM from turning over. The transmission shaft is located inside the inner Kelly, and the host pulley conveyor is provided on the upper portion of the outer Kelly. Such an arrangement can reduce the sizes of the inner and outer Kellys, and enlarge the working space of the host area, such that the structure of the TBM can be more compact, so as to meet the requirements for the excavation of a small-diameter hard rock tunnel.

Description

BACKGROUND OF THE PRESENT INVENTION

FIELD OF INVENTION [0001] The present invention relates to a full face rock tunnel boring machine (abbreviated as TBM), and more particularly to a small-diameter Kelly TBM driven by a central shaft.

DESCRIPTION OF RELATED ARTS [0002] TBM is the abbreviation of full face hard rock tunnel boring machine. It is a special equipment for tunnel excavation and plays an important role in the construction of mountain tunnels and urban subways. Depending on the working principle and structure of the TBM, the TBM includes a shielded-type TBM and an open-type TBM. Depending on the forms of supporting of the open-type TBM, the open-type TBM can be divided into a Kelly TBM and a main beam TBM.

[0003] The Kelly TBM is mainly composed of a cutter head, a shield, a drive assembly, an inner Kelly system, an outer Kelly system, a rear supporter, a belt conveyor and other auxiliary systems. Usually, the driving motor of the Kelly TBM is provided at the rear of the outer Kelly, and each motor has a drive shaft mounted thereat, and the power is transmitted to a driving box by the drive shaft and then is transmitted to the cutter head, for breaking rock. However, for a small-diameter TBM, especially for TBMs having an excavating diameter less than 4m, due to its small space, the structure employing multiple transmission shafts needs a bigger space, which results in the difficulty of the structural design of the inner Kelly and the outer Kelly. In addition, the area of the main machine has a small operating space, which is inconvenient to support and maintain the tunnel by the front of the main machine.

SUMMARY OF THE PRESENT INVENTION [0004] The present invention provides a small-diameter Kelly TBM driven by a central shaft, which can solve the problem that the structure of the TBM in the prior art does not satisfy the construction of the small-diameter tunnels.

[0005] The technical solution of the present invention is realized as follows: a smalldiameter Kelly TBM driven by a central shaft, which including a cutter head, a shield, a steel arch mounter, a transmission shaft, an inner Kelly, an outer Kelly, a supporting shoe, a propulsion oil cylinder, and a main belt conveyor, a rear supporter, a drive box, a driving motor, a decelerator, a main bearing, an adapter ring, a clamping oil cylinder, and a clamping oil cylinder mounting seat, wherein the cutter head is connected with the adapter ring, the adapter ring is connected with an inner ring of the main bearing, an outer ring of the main bearing is connected with the inner Kelly, the main bearing is installed inside an inner casing of the shield, and the clamping oil cylinder mounting seat is installed at a front end of the inner Kelly, the clamping oil cylinder is mounted on the clamping oil cylinder mounting seat, and the clamping oil cylinder can be matched with the shield; the outer Kelly is divided into left and right halves, and the left half and the right half are connected with each other as a whole, wherein the outer Kelly is installed on the inner Kelly and is slidingly matched with the inner Kelly back and forth, wherein the rear supporter is installed on the inner Kelly, wherein an oil cylinder is provided between the inner Kelly and the rear supporter, wherein the main belt conveyor is installed on an upper portion of the inner Kelly, and the shield has a slot provided in the upper part of the shield, which is used for the main belt conveyor to pass through; the driving box, the decelerator and the driving motor are orderly installed on a terminal end of the inner Kelly, wherein the decelerator is connected with the driving motor, the decelerator is connected with the driving box, the transmission shaft is provided inside the inner Kelly, wherein a front end of the transmission shaft is connected with the adapter ring, and a rear end of the transmission shaft is connected with the driving box.

[0006] The outer Kelly is equipped with a supporting shoe, the outer Kelly and the supporting shoe are equipped with an oil cylinder; the outer Kelly is connected with one end of the propulsion oil cylinder, and the inner Kelly is connected with another end of the propulsion oil cylinder.

[0007] The present invention has the following advantages: the driving motor, the decelerator and the driving box are placed at the terminal end of the inner Kelly, which can reduce the length of the shield, support the surrounding rock in time, and move the center of gravity of the main machine backward, so as to improve the stability of the main machine and prevent the TBM being planted. The transmission shaft is located inside the inner Kelly, and the main belt conveyor is placed on the upper part of the outer Kelly. With this arrangement, the size of the inner Kelly and the outer Kelly can be reduced, and the working space of the area of the main machine can be increased, which can make the structure of the TBM more compact to accommodate the small-diameter excavation of a hard rock tunnel.

BRIEF DESCRIPTION OF THE DRAWINGS [0008] 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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only used for certain embodiments of the present invention, and depending on this drawings, those skilled in the art can obtain other drawings without any creative work.

[0009] Fig.l is a structural schematic diagram of the TBM of the present invention.

[0010] Fig.2 is a cross-sectional view along A-A direction of the TBM shown in Fig.l;

[0011] Fig.3 is a cross-sectional view along B-B direction of the TBM shown in Fig.l;

[0012] Fig.4 is a cross-sectional view along C-C direction of the TBM shown in Fig.l.

[0013] In the above drawings: the drawing number 1 represents the cutter head, the drawing number 2 represents the shield, the drawing number 3 represents the steel arch mounter, the drawing number 4 represents the transmission shaft, the drawing number 5 represents the inner Kelly, the drawing number 6 represents the outer Kelly, the drawing number 7 represents the supporting shoe, the drawing number 8 represents the propulsion oil cylinder, the drawing number 9 represents the main belt conveyor, the drawing number 10 represents the rear supporter, the drawing number 11 represents the driving box, the drawing number 12 represents the driving motor, the drawing number 13 represents the decelerator, the drawing number 14 represents the main bearing, the drawing number 15 represents the adapter ring, the drawing number 16 represents the clamping oil cylinder, and the drawing number 17 represents the clamping oil cylinder mounting seat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0014] The technical solution in the embodiment of the present invention is clearly and completely described in the following with reference to the accompanying drawings in the embodiment of the present invention. It is obvious that the described embodiment is only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiment of the present invention without departing from the inventive scope are the scope of the present invention.

[0015] As shown in Figs 1 to 4, the small-diameter Kelly TBM driven by a central shaft of the present invention comprises a cutter head 1, a shield 2, a steel arch mounter 3, a transmission shaft 4, an inner Kelly 5, an outer Kelly 6, and a supporting shoe 7, a propulsion oil cylinder 8, a main belt conveyor 9, a rear supporter 10, a driving box 11, a driving motor 12, a decelerator 13, a main bearing 14, an adapter ring 15, a clamping oil cylinder 16 and a clamping oil cylinder mounting seat 17.

[0016] The cutter head 1 is connected with the adapter ring 15, the adapter ring 15 is connected with an inner ring of the main bearing 14, an outer ring of the main bearing 14 is connected with the inner Kelly 5, the main bearing 14 is installed in an inner casing of the shield 2, and the clamping oil cylinder mounting seat 17 is installed at a front end of the inner Kelly 5, the clamping oil cylinder 16 is mounted on the clamping oil cylinder mounting seat 17, and the clamping oil cylinder 16 can be matched with the shield 2.

[0017] The outer Kelly 16 is divided into left and right halves, and the left half and the right half are connected with each other as a whole, wherein the outer Kelly 6 is installed on the inner Kelly 5 and is slidingly matched with the inner Kelly 5 back and forth, wherein the rear supporter 10 is installed on the inner Kelly 5, wherein an oil cylinder is provided between the inner Kelly 5 and the rear supporter 10, wherein the main belt conveyor 9 is installed on an upper portion of the inner Kelly 5, and the shield 2 has a slot provided in the upper part of the shield 2, which is used for the main belt conveyor 9 to pass through.

[0018] The driving box 11, the decelerator 13 and the driving motor 12 are sequentially installed on a terminal end of the inner Kelly 5, wherein the decelerator 13 is connected with the driving motor 12, the decelerator 13 is connected with the driving box 11, the transmission shaft 4 is provided inside the inner Kelly 5, wherein a front end of the transmission shaft 4 is connected with the adapter ring f5, and a rear end of the transmission shaft 4 is connected with the driving box f f.

[0019] The outer Kelly 6 is equipped with the supporting shoe 7, the outer Kelly 6 and the supporting shoe 7 are equipped with an oil cylinder; the outer Kelly 6 is connected with one end of the propulsion oil cylinder 8, and the inner Kelly 5 is connected with another end of the propulsion oil cylinder 8.

[0020] The working process of the present invention is as follows: when tunneling, the supporting shoe 7 supports the hole wall, the propulsion oil cylinder 8 is contracted with a rod cavity to pull the inner Kelly 5, the cutter head 1 and the like to move forward, and the driving motor 12 drives the transmission shaft 4 to rotate by the decelerator 13 and the driving box 11, wherein the driving shaft 4 is driven to rotate the adapter ring 15 and the cutter head 1 to break the rock, and the muck is scraped to the main belt conveyor 9 by the scraper plate, thereby transporting the muck to outside of the hole.

[0021] When changing step, the rear supporter 10 is reached out and used as a 5 supporting point for supporting the weight of the main machine, the supporting shoe 7 is retracted, and the propulsion oil cylinder 8 drives the outer Kelly 6 to move one stroke forward, and then the supporting shoe 7 supports the hole wall, the rear supporter 10 is retracted, and the stroke of the next excavation is continued.

[0022] The above description is only the preferred embodiment of the present 10 invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc. which are included in the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

WHAT IS CLAIMED IS:

l.A small-diameter Kelly TBM driven by a central shaft, which is characterized by including a cutter head (1), a shield (2), a steel arch mounter (3), a transmission shaft (4), an inner Kelly (5), an outer Kelly (6), a supporting shoe (7), a propulsion oil cylinder (8), a main belt conveyor (9), a rear supporter (10), a driving box (11), a driving motor (12), a decelerator (13), a main bearing (14), an adapter ring (15), a clamping oil cylinder (16) and a clamping oil cylinder mounting seat (17); wherein the cutter head (1) is connected with the adapter ring (15), the adapter ring (15) is connected with the inner ring of the main bearing (14), the outer ring of the main bearing (14) is connected with the inner Kelly, the main bearing (14) is installed inside the inner casing of the shield (2), the clamping oil cylinder mounting seat (17) is installed at the front end of the inner Kelly (5), the clamping oil cylinder (16) is provided at the clamping oil cylinder mounting seat (17), and the clamping oil cylinder (16) is matched with the shield (2); wherein the outer Kelly (6) is divided into left and right halves, and the left half and the right half of the outer Kelly is connected with each other as a whole, the outer Kelly (6) is installed on the inner Kelly (5) and is slidingly matched with the inner Kelly (5) back and forth, the rear supporter (10) is installed on the inner Kelly (5), an oil cylinder is provided between the inner Kelly (5) and the rear supporter (10), the main belt conveyor (9) is installed on an upper portion of the inner Kelly (5), and the shield (2) has a slot provided in the upper part of the shield (2), which is used for the main belt conveyor (9) to pass through; wherein the driving box (11), the decelerator (13) and the driving motor (12) are sequentially installed on a terminal end of the inner Kelly (5), the decelerator (13) is connected with the driving motor (12), the decelerator (13) is connected with the driving box (11), the transmission shaft (4) is provided inside the inner Kelly (5), a front end of the transmission shaft (4) is connected with the adapter ring (15), and a rear end of the transmission shaft (4) is connected with the driving box (11).

Ί. The small-diameter Kelly TBM driven by a central shaft, according to claim 1, is characterized in that the outer Kelly (6) is provided with the supporting shoe (7), and the outer Kelly (6) and the supporting shoe (7) are equipped with an oil cylinder; wherein the outer Kelly (6) is connected with one end of the propulsion oil cylinder (8), and the inner 5 Kelly (5) is connected with another end of the propulsion oil cylinder (8).