A miniature pipe-jacking tunnel boring machine

Abstract

The present invention proposes a micro-jacking pipe type tunnel boring machine, including a propulsion system and a shield body, wherein the propulsion system is connected to a fixed base, a soil bin partition is arranged in the shield body, the fixed base cooperates with the shield body, a driving system is arranged on the fixed base, the driving system is connected to a fixed spiral blade in the shield body, and the fixed spiral blade is connected to a cutter head in front of the soil bin partition. The advantages of the present invention are as follows: 1) It can realize the excavation of pipeline tunnels with very small diameters passing under roads, highways, etc., and the normal operation of traffic is not affected during construction, and the impact on the surrounding environment is also relatively small; 2) Construction can be carried out under a tunnel at a relatively close distance, which will not affect the normal use of the tunnel; 3) The propulsion system and the driving system are located at the starting shaft, which is convenient for inspection and maintenance during use.

Description

Technical Field

[0001] The invention relates to tunnel construction equipment, in particular to a micro-tube jacking type tunnel boring machine. Background Art

[0002] Tunnel construction is gradually improving, and the underground development area is increasing. When excavating again, there are more and more situations where existing tunnels are crossed, which undoubtedly increases the difficulty and risk of construction. When crossing existing tunnels or crossing roads and highways to build sewage, cable, gas and other pipelines, if open-cut construction is used, it will affect the normal operation of road traffic and have a significant impact on the surrounding environment.

[0003] Although existing tunnel boring equipment can realize dark excavation construction, it is difficult to achieve a diameter of φ1m or less due to the problem of internal structure space limitation, so its structure needs to be further improved. Summary of the invention

[0004] The present invention proposes a micro-tube jacking type tunnel boring machine, which solves the problem that the existing tunnel boring equipment is difficult to achieve a diameter of φ1m. The driving system and propulsion system of the tunnel boring machine are located at the starting shaft, and the slag is discharged by spiral blades. It can realize the function of a micro-tunnel boring machine with a diameter of about φ1m. According to this design concept, a jacking type tunnel boring machine with a smaller diameter can also be produced. When using this product, it is no longer necessary to excavate the entire road surface during the construction of short-distance municipal engineering, which affects traffic and the surrounding environment.

[0005] The technical solution of the present invention is implemented as follows: a micro-jacking pipe tunneling machine includes a propulsion system and a shield body, the propulsion system is connected to a fixed base, a soil bin partition is provided in the shield body, the fixed base cooperates with the shield body, a drive system is provided on the fixed base, the drive system is connected to the fixed spiral blades in the shield body, and the fixed spiral blades are connected to the cutter disc in front of the soil bin partition.

[0006] At least one pipe section is arranged between the shield body and the fixed base, and at least one detachable spiral blade is connected between the driving system and the fixed spiral blade.

[0007] The pipe section comprises a bottom pipe section and a top pipe section.

[0008] The front ends of the driving system and the detachable spiral blades are provided with a clamping portion, and the rear ends of the spiral blades are provided with a clamping groove.

[0009] The knife disc is provided with a nozzle.

[0010] A central channel is arranged in the driving system and the spiral blades, a rotary joint connected to the central channel is arranged on the driving system, and the central channel is connected to the nozzle.

[0011] The cutter disc is provided with a rolling cutter.

[0012] The top of the soil bin partition is provided with an opening, and a slag sliding plate is provided at the opening.

[0013] A slurry stop plate is provided at the tunnel entrance.

[0014] The fixed spiral blade is connected to the transmission shaft through a connecting pin shaft, the transmission shaft is arranged in the shield body through a bearing, and the transmission shaft is connected to the cutter disc.

[0015] The advantages of the present invention are as follows: 1) it is possible to realize the excavation of a very small diameter pipeline tunnel under a road, without affecting the normal operation of traffic during construction and with little impact on the surrounding environment; 2) it is possible to carry out construction under an existing tunnel without affecting the normal use of the tunnel; 3) the propulsion system and the drive system are located at the starting shaft, which is convenient for inspection and maintenance during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is the construction schematic diagram I of the present invention.

[0019] Figure 3 This is the construction schematic diagram II of the present invention.

[0020] Figure 4 This is the construction schematic diagram III of the present invention.

[0021] Figure 5 This is the construction schematic diagram IV of the present invention.

[0022] In the figure: 1-cutterhead, 2-nozzle, 3-slag chute, 4-center channel, 5-fixed spiral blade, 6-detachable spiral blade, 7-pipe section, 8-drive system, 9-fixed base, 10-propulsion system, 11-swivel joint, 12-stop plate, 13-connecting pin, 14-bearing, 15-soil bin partition, 16-shield, 17-excavation area. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a micro jacking pipe tunneling machine includes a cutter head 1, a nozzle 2, a slag plate 3, a central channel 4, a fixed spiral blade 5, a detachable spiral blade 6, a pipe segment 7, a drive system 8, a fixed base 9, a propulsion system 10, a swivel joint 11, a slurry stop plate 12, a connecting pin shaft 13, a bearing 14, a soil bin partition 15 and a shield body 16.

[0025] The cutterhead 1 is installed at the front end of the soil bin partition 15, and a roller cutter is provided on the cutterhead 1 to excavate the excavation area 17. The soil bin partition 15 is welded in the shield body 16, and an opening is provided at the top of the soil bin partition 15. A slag plate 3 located at the opening is welded at the rear of the soil bin partition 15, and the excavated slag is transferred from the front of the soil bin partition 15 to the rear through the opening and the slag plate 3.

[0026] The cutter head 1 is connected to the front end of the transmission shaft, and the transmission shaft is movably installed in the shield body 16 through the bearing 14. The rear end of the transmission shaft is connected to the fixed spiral blade 5 through the connecting pin 13. At least one detachable spiral blade 6 is arranged between the fixed spiral blade 5 and the driving system 8. The front ends of the detachable spiral blade 6 and the driving system 8 are provided with a clamping part, and the rear ends of the fixed spiral blade 5 and the detachable spiral blade 6 are provided with a clamping groove, which is clamped into the clamping part to achieve the fixed installation of the spiral blade. At least one pipe section 7 is arranged between the shield body 16 and the fixed base 9. The shield body 16 is welded to the frontmost pipe section 7, and the adjacent two pipe sections 7 are welded. The driving system 8 is installed on the fixed base 9, and the fixed base 9 is connected to the propulsion system 10. The propulsion system 10 is located on the reaction frame at the starting well position. The propulsion system 10 provides forward power for the shield body 16 and the cutter head 1 through the fixed base 9, and the driving system 8 drives the rotation of the cutter head 1 through the fixed spiral blade 5 and the detachable spiral blade 6.

[0027] The pipe section 7 includes a bottom pipe section and a top pipe section. When the detachable spiral blade 6 is installed, the bottom pipe section is installed first, then the detachable spiral blade 6 is installed, and finally the top pipe section is installed. The bottom pipe section and the top pipe section form a complete annular pipe section.

[0028] The cutter head 1 is provided with a nozzle 2, and a central channel 4 is provided inside the transmission shaft, the fixed spiral blade 5, the detachable spiral blade 6 and the driving system 8. The front end of the central channel 4 is connected to the nozzle 2, and the rear end of the central channel 5 is connected to the rotary joint 11. The soil conditioner can be injected into the excavation area 17, or the tunnel face can be flushed.

[0029] A slurry-stopping plate 12 for blocking slurry is provided at the tunnel entrance.

[0030] When this equipment is in use, the drive system and propulsion system are located at the starting well. The thrust of the propulsion system acts on the pipe segments and shield to push the entire machine in the excavation direction. The drive system is fixed to the propulsion system through a fixed base. When the propulsion system is extended, the drive system extends along with it. At the same time, the drive system rotates to transmit force to the cutterhead through the screw shaft.

[0031] The slag is transported to the spiral blade position through the scraper plate of the cutter head and the slag slide plate at the front of the shield body, and then transported out of the tunnel by the rotation of the spiral blade. After advancing for a certain distance, the propulsion system is retracted, and a new pipe section is installed in the starting shaft and the detachable spiral blade is assembled. This cycle is repeated to complete the entire propulsion process.

[0032] The detailed advancement process is as follows:

[0033] like Figure 2 As shown, step one: the propulsion system acts on the pipe segment to push the entire machine to move in the excavation direction, and the slurry stop plate at the tunnel entrance is used to block the slurry that may be generated in front.

[0034] like Figure 3 As shown, step 2: after pushing for a certain distance, stop pushing, retract the pushing cylinder, put in the bottom joint, and weld the connecting parts between the pipe sections.

[0035] like Figure 4 As shown, step three: after completing the welding of the bottom pipe section, insert a detachable spiral blade to connect it with the spiral shaft of the front spiral blade and the shaft of the driving system.

[0036] like Figure 5 As shown, step four: insert the top pipe segment and weld the connecting parts between the pipe segments to form a complete annular pipe segment.

[0037] Through the rear swivel joint and the central channel, soil conditioner can be injected into the excavation face or the face can be flushed.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-jacking type tunnel boring machine, comprising a propulsion system (10) and a shield body (16), wherein the propulsion system (10) is connected to a fixed base (9), and a soil bin partition (15) is provided in the shield body (16), characterized in that: The fixed base (9) cooperates with the shield body (16), a driving system (8) is provided on the fixed base (9), the driving system (8) is connected to the fixed spiral blade (5) in the shield body (16), and the fixed spiral blade (5) is connected to the cutter head (1) at the front of the soil bin partition (15); The cutterhead (1) is provided with a nozzle (2); a central channel (4) is provided in the drive system (8) and the spiral blades; a rotary joint (11) is provided on the drive system (8) and is connected to the central channel (4); the central channel (4) is connected to the nozzle (2), and a soil improver can be injected into the excavation area (17) or the tunnel face can be flushed; The top of the soil bin partition (15) is provided with an opening, and a slag plate (3) is provided at the opening; the excavated soil is transferred from the front of the soil bin partition (15) to the rear through the opening and the slag plate (3); At least one pipe section (7) is provided between the shield body (16) and the fixed base (9), and at least one detachable spiral blade (6) is connected between the drive system (8) and the fixed spiral blade (5); the pipe section (7) comprises a bottom pipe section and a top pipe section; when the detachable spiral blade (6) is installed, the bottom pipe section is installed first, then the detachable spiral blade (6), and finally the top pipe section is installed, so that the bottom pipe section and the top pipe section form a complete annular pipe section.

2. The micro-jacking pipe boring machine according to claim 1, characterized in that: The front ends of the driving system (8) and the detachable spiral blade (6) are provided with a clamping portion, and the rear end of the spiral blade is provided with a clamping groove.

3. The micro-jacking pipe boring machine according to claim 1 or 2, characterized in that: The cutter disc (1) is provided with a rolling cutter.

4. The micro-jacking pipe boring machine according to claim 1 or 2, characterized in that: A slurry stop plate (12) is provided at the tunnel entrance.

5. The micro-jacking pipe tunneling machine according to claim 1 or 2, characterized in that: The fixed spiral blade (5) is connected to the transmission shaft via a connecting pin (13); a bearing (14) is provided between the transmission shaft and the shield body (16); and the transmission shaft is connected to the cutter disc (1).

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