Pipe joint extending device and slurry balance shield machine comprising same

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a pipeline extending device and a slurry balance shield machine comprising the same, the pipeline extending device comprises a shield trolley, a first extending unit, a second extending unit, a front switching unit, a rear switching unit and an extending pipe joint; the first extending unit and the second extending unit are arranged on the shield trolley in a sliding mode in the tunneling direction of a tunnel. The first extension unit and the second extension unit are arranged in parallel; the front switching unit is communicated with the circulation system and the first extension unit and / or the second extension unit; the rear switching unit is communicated with a mud-water separation station; the first extension unit and the second extension unit are respectively connected with the rear switching unit through different mud pipelines; and the extension pipe joint is connected between the slurry pipeline and the first extension unit and / or the second extension unit. According to the device, the pipeline extension operation can be synchronously realized in a continuous tunneling construction non-stop state, so that the construction efficiency is improved; the extension pipe joints are straight pipe joints, the structure is simple, and the construction cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, concretely relates to a pipe joint extension device and the slurry balance shield machine containing the device. BACKGROUND

[0002] When the slurry balance shield machine is under construction, the slurry is pumped and transported by the slurry pump and slurry pipeline, when the shield machine advances a distance, the slurry pipeline needs to be changed and extended. The existing technology basically configures a single set of pipe joint extension device, and the pipe changing operation is carried out in the circulation system isolation (ie interruption) mode, which obviously restricts the tunnel construction efficiency and is difficult to match the synchronous push and continuous construction demand.

[0003] Based on the above, it is urgent to design a pipe joint extension device and a slurry balance shield machine containing the device to solve the problems in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a pipe joint extension device and a slurry balance shield machine containing the device, and the specific technical scheme is as follows:

[0005] A pipe joint extension device, comprising a shield trolley, a first extension unit, a second extension unit, a front switching unit, a rear switching unit and an extension pipe joint;

[0006] The first extension unit and the second extension unit are slidably arranged on the shield trolley along the tunnel excavation direction; the first extension unit and the second extension unit are arranged in parallel;

[0007] The front switching unit is connected with the first extension unit and / or the second extension unit; the rear switching unit is connected with the slurry separation station, and the first extension unit and the second extension unit are connected with the rear switching unit through different slurry pipelines respectively;

[0008] The extension pipe joint is connected between the slurry pipeline and the first extension unit and / or the second extension unit, and the extension pipe joint comprises a straight pipe joint.

[0009] Further, the shield trolley comprises at least two front trolleys and rear trolleys connected in series, and the front trolley is connected with the shield host; the first extension unit is slidably arranged on the front trolley, and the second extension unit is slidably arranged on the rear trolley;

[0010] Alternatively, the shield trolley comprises one trolley, and the shield trolley is connected with the shield host.

[0011] Further, the first extension unit and the second extension unit are provided with a bending hose group connected with the front switching unit respectively, and the bending hose group comprises a first U-shaped pipe group and a second U-shaped pipe group.

[0012] The first U-shaped tube group is slidingly arranged on the top of the front trolley, and the second U-shaped tube group is slidingly arranged on the top of the rear trolley.

[0013] Alternatively,

[0014] The first U-shaped tube group is slidingly arranged on the top of the shield trolley, and the second U-shaped tube group is slidingly arranged above the first U-shaped tube group.

[0015] Further, the first extension unit further comprises a front sliding frame slidingly arranged on the side of the shield trolley; a first elbow joint is arranged on the front sliding frame, and the first elbow joint is connected with the first mud pipeline and the first U-shaped tube group, or the first elbow joint is connected with the extension pipe section and the first U-shaped tube group.

[0016] The second extension unit comprises a rear sliding frame slidingly arranged on the side of the shield trolley opposite to the front sliding frame; a second elbow joint is arranged on the rear sliding frame, and the second elbow joint is connected with the second mud pipeline and the second U-shaped tube group, or the second elbow joint is connected with the extension pipe section and the second U-shaped tube group.

[0017] Further, the first U-shaped tube group comprises a first mud inlet U-shaped tube and a first mud outlet U-shaped tube arranged side by side, the first mud inlet U-shaped tube is connected with the front switching unit through a mud inlet I valve and connected with the first elbow joint through a mud inlet III valve; the first mud outlet U-shaped tube is connected with the front switching unit through a mud outlet I valve and connected with the first elbow joint through a mud outlet III valve.

[0018] The second U-shaped tube group comprises a second mud inlet U-shaped tube and a second mud outlet U-shaped tube arranged side by side, the second mud inlet U-shaped tube is connected with the front switching unit through a mud inlet II valve and connected with the second elbow joint through a mud inlet IV valve; the second mud outlet U-shaped tube is connected with the front switching unit through a mud outlet II valve and connected with the second elbow joint through a mud outlet IV valve.

[0019] Further, the front switching unit is arranged on the shield trolley and comprises a mud inlet tee and a mud outlet tee arranged side by side, the output ends of the first mud inlet U-shaped tube and the second mud inlet U-shaped tube are connected with the mud inlet tee, and the input ends of the first mud outlet U-shaped tube and the second mud outlet U-shaped tube are connected with the mud outlet tee.

[0020] The rear switching unit is arranged at the wellhead or in the tunnel and is connected with the mud separation station, the rear switching unit comprises a main mud inlet tee and a main mud outlet tee arranged side by side, the mud pipeline connected with the first mud inlet U-shaped tube and the second mud inlet U-shaped tube is connected with the main mud inlet tee, and the mud pipeline connected with the first mud outlet U-shaped tube and the second mud outlet U-shaped tube is connected with the main mud outlet tee.

[0021] Two branch pipes of the main inlet three-way are respectively provided with a main inlet I valve and a main inlet II valve.

[0022] Further, the shield trolley is provided with a hoisting device, and the hoisting device is used for hoisting and assisting installation of the stored extension pipe section.

[0023] Further, the shield trolley is provided with a support, and the support is used for storing and transporting the extension pipe section.

[0024] Further, a storage box is arranged at the bottom of the shield trolley and used for storing waste slurry generated during pipe replacement.

[0025] The mud balance shield tunneling machine comprises a shield main machine and the pipe section extension device.

[0026] The technical scheme has the following beneficial effects:

[0027] (1) The pipe section extension device comprises a shield trolley, a first extension unit, a second extension unit, a front switching unit, a rear switching unit and an extension pipe section.

[0028] (2) In the utility model, the front sliding frame and the rear sliding frame are arranged on the two sides of the shield trolley, thereby solving the problem that the front sliding frame and the rear sliding frame arranged on the same side of the shield trolley limit the single-side operation space.

[0029] (3) The shield trolley is provided with a hoisting device, and the hoisting device hoists and assists installation of the stored extension pipe section.

[0030] (4) The shield trolley is provided with a support, and the support stores and transports the extension pipe section.

[0031] (5) In this utility model, a storage box is provided at the bottom of the tunnel boring machine to store the waste slurry generated during pipe replacement.

[0032] (6) This utility model provides a slurry balance shield machine, including a shield machine host and a pipe extension device as described above. The pipe extension device is connected to the shield machine host and can realize simultaneous tunneling and pipeline extension operations.

[0033] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0035] Figure 1 This is a schematic diagram of the overall structure of the slurry balance shield tunneling machine in this embodiment of the utility model;

[0036] Figure 2 yes Figure 1 A cross-sectional schematic diagram of the EE position;

[0037] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the FF position in the middle;

[0038] Figure 4 This is a schematic diagram of the pipe section extension device in Embodiment 1 of this utility model;

[0039] Figures 5-12 This is a schematic diagram of the state of pipe replacement operation using the pipe section extension device in Embodiment 1 of this utility model;

[0040] Figure 13 This is a schematic diagram of the pipe section extension device in Embodiment 2 of this utility model;

[0041] Figure 14 yes Figure 13 A cross-sectional schematic diagram;

[0042] Wherein, 1, shield trolley, 1.1, front trolley, 1.2, rear trolley, 1.3, first crane, 1.4, first support, 1.5, first storage box, 1.6, second crane, 1.7, second support, 1.8, second storage box, 2, first extension unit, 2.1, first U-shaped pipe group, 2.1.1, first pulp inlet U-shaped pipe, 2.1.2, first pulp outlet U-shaped pipe, 2.2, front sliding frame, 2.3, first elbow pipe joint, 2.4, pulp inlet I valve, 2.5, pulp inlet III valve, 2.6, pulp outlet I valve, 2.7, pulp outlet III valve, 3, second extension unit, 3.1, second U-shaped pipe group, 3.1.1, second pulp inlet U-shaped pipe, 3.1.2, second pulp outlet U-shaped pipe, 3.2, rear sliding frame, 3.3, second elbow pipe joint, 3.4, pulp inlet II valve, 3.5, pulp inlet IV valve, 3.6, pulp outlet II valve, 3.7, pulp outlet IV valve, 4, front switching unit, 4.1, pulp inlet tee, 4.2, pulp outlet tee, 5, rear switching unit, 5.1, main inlet tee, 5.2, main outlet tee, 5.3, main inlet I valve, 5.4, main inlet II valve, 5.5, main outlet I valve, 5.6, main outlet II valve, 6, extension pipe section, 7, circulation system, 8, mud pipeline, 8.1, tunnel inner pipeline, 8.2, pipeline valve group, 9, shield main machine, 10, pipeline crane. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways as defined and covered.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0046] Example one

[0047] It should be noted that in this embodiment, "front" and "rear" are the orientations indicated based on the tunneling direction.

[0048] Referring to Figures 1-12 The embodiment provides a pipe joint extending device, which comprises a shield trolley 1, a first extending unit 2, a second extending unit 3, a front switching unit 4, a rear switching unit 5 and an extending pipe joint 6.

[0049] Referring to Figure 4 The shield trolley 1 comprises a front trolley 1.1 and a rear trolley 1.2 connected in series, and the front trolley 1.1 is connected with a shield main machine 9.

[0050] The first extending unit 2 and the second extending unit 3 are slidingly arranged on the shield trolley 1 along a tunneling direction; the first extending unit 2 is slidingly arranged on the front trolley 1.1, the second extending unit 3 is slidingly arranged on the rear trolley 1.2, and the first extending unit 2 and the second extending unit 3 are arranged in parallel.

[0051] The front switching unit 4 is connected with the first extending unit 2 and / or the second extending unit 3 and a circulating system 7; the rear switching unit 5 is connected with a slurry separation station; the first extending unit 2 and the second extending unit 3 are connected with the rear switching unit 5 through different slurry pipelines 8; in the embodiment, the slurry pipelines 8 are laid in a formed tunnel and used for slurry supply and transportation of a tunnel section.

[0052] Preferably, the slurry pipeline 8 comprises a tunnel pipeline 8.1 and a pipeline valve group 8.2; the tunnel pipeline 8.1 is fixed in the tunnel and is composed of a plurality of pipe joints with a length L2 (10.5 m in the embodiment); and the pipeline valve group 8.2 is installed on the tunnel pipeline 8.1 according to actual working conditions (for example, a group of valves are arranged at intervals of about 50 m along the tunneling direction, which is used for avoiding slurry backflow in the slurry pipeline between a pipe replacement position and the rear switching unit 5 when the pipe is replaced, and effectively reducing the amount of waste slurry).

[0053] The extending pipe joint 6 is connected between the slurry pipeline 8 and the first extending unit 2 and / or the second extending unit 3 and is used for extending the slurry pipeline 8; in the embodiment, the extending pipe joint 6 is a straight pipe joint.

[0054] The first extending unit 2 and the second extending unit 3 are provided with a bending hose group connected with the front switching unit 4 respectively, and the bending hose group comprises a first U-shaped pipe group 2.1 slidingly arranged on the front trolley 1.1 and a second U-shaped pipe group 3.1 slidingly arranged on the rear trolley.

[0055] Referring to Figure 2 and Figures 4-12, the first extension unit 2 includes a front sliding frame 2.2, which is slidingly arranged on the side (right side) of the front trolley 1.1; a first elbow joint 2.3 is arranged on the front sliding frame 2.2, which is connected with the first mud pipe 8A and the first U-shaped pipe group 2.1, or is connected with the extension pipe section 6 and the first U-shaped pipe group 2.1.

[0056] Referring to Figures 4-12 , the first U-shaped pipe group 2.1 is slidingly arranged on the top of the front trolley, and includes a first mud inlet U-shaped pipe 2.1.1 and a first mud outlet U-shaped pipe 2.1.2 arranged side by side; the first mud inlet U-shaped pipe 2.1.1 is connected with the front switching unit 4 through a mud inlet I valve 2.4 and connected with the first elbow joint 2.3 through a mud inlet III valve 2.5; the first mud outlet U-shaped pipe 2.1.2 is connected with the front switching unit 4 through a mud outlet I valve 2.6 and connected with the first elbow joint 2.3 through a mud outlet III valve 2.7; in this embodiment, the mud inlet III valve 2.5 and the mud outlet III valve 2.7 are fixedly connected on the front sliding frame 2.2.

[0057] In this embodiment, the front sliding frame 2.2 is further provided with a fine adjustment device (using the prior art), which is arranged between the first U-shaped pipe group 2.1 and the first elbow joint 2.3, and is used for fine adjustment of the position of the first U-shaped pipe group 2.1 and the first elbow joint 2.3; the front sliding frame 2.2 can drive the first U-shaped pipe group 2.1, the mud inlet III valve 2.5, the mud outlet III valve 2.7 and the fine adjustment device to move back and forth along the tunneling direction of the shield tunneling machine by a set distance L2 (one pipe section distance).

[0058] Referring to Figures 3-12 , the second extension unit 3 includes a rear sliding frame 3.2, which is slidingly arranged on the side (left side of the rear trolley 1.2 in this embodiment) of the rear trolley 1.2 opposite to the front sliding frame 2.2; a second elbow joint 3.3 is arranged on the rear sliding frame 3.2, which is connected with the second mud pipe 8B and the second U-shaped pipe group 3.1, or is connected with the extension pipe section 6 and the second U-shaped pipe group 3.1.

[0059] The second U-shaped pipe group 3.1 is slidingly arranged on the top of the rear trolley 1.2, and comprises a second pulp feeding U-shaped pipe 3.1.1 and a second pulp discharging U-shaped pipe 3.1.2 arranged side by side. The second pulp feeding U-shaped pipe 3.1.1 is connected with the front switching unit 4 through a pulp feeding II valve 3.4 and connected with the second elbow joint 3.3 through a pulp feeding IV valve 3.5. The second pulp discharging U-shaped pipe 3.1.2 is connected with the front switching unit 4 through a pulp discharging II valve 3.6 and connected with the second elbow joint 3.3 through a pulp discharging IV valve 3.7. In the embodiment, the pulp feeding IV valve 3.5 and the pulp discharging IV valve 3.7 are fixedly connected on the rear sliding frame 3.2.

[0060] In the embodiment, a fine adjustment device (using prior art) is further arranged on the rear sliding frame 3.2, and the fine adjustment device is arranged between the second U-shaped pipe group 3.1 and the second elbow joint 3.3, and is used for fine adjustment of the positions of the second U-shaped pipe group 3.1 and the second elbow joint 3.3. The rear sliding frame 3.2 can drive the second U-shaped pipe group 3.1, the pulp feeding IV valve 3.5, the pulp discharging IV valve 3.7 and the fine adjustment device to move back and forth along the tunneling direction of the shield tunneling machine by a set distance L2 (a distance of one pipe joint).

[0061] In the embodiment, the first elbow joint 2.3 and the second elbow joint 3.3 each comprise two joints of pulp feeding and pulp discharging.

[0062] In the embodiment, the front switching unit 4 is arranged on the shield trolley 1 and arranged at the front of the first extension unit 2, and comprises a pulp feeding tee 4.1 and a pulp discharging tee 4.2 arranged side by side. The front end of the pulp feeding tee 4.1 is communicated with a trolley section pulp feeding pipe, and the rear end is respectively provided with a pulp feeding I valve 2.4 and a pulp feeding II valve 3.4, and is respectively communicated with the output end of the first pulp feeding U-shaped pipe and the second pulp feeding U-shaped pipe. When the front end of the pulp feeding tee 4.1 is communicated with the trolley section pulp feeding pipe, a maintenance gate valve can be arranged to facilitate starting and stopping of the pulp feeding tee 4.1 during pipeline maintenance.

[0063] The front end of the pulp discharging tee 4.2 is communicated with a trolley section pulp discharging pipe, and the rear end is respectively provided with a pulp discharging I valve 2.6 and a pulp discharging II valve 3.6, and is respectively connected with the input end of the first pulp discharging U-shaped pipe and the second pulp discharging U-shaped pipe. When the front end of the pulp discharging tee 4.2 is communicated with the trolley section pulp discharging pipe, a maintenance gate valve can be arranged to facilitate starting and stopping of the pulp discharging tee 4.2 during pipeline maintenance.

[0064] In the embodiment, the rear switching unit 5 is arranged in the starting wellhead or the tunnel and is arranged in front of the mud separation station. The rear switching unit 5 comprises a main inlet three-way valve 5.1 and a main outlet three-way valve 5.2 arranged side by side. The rear end of the main inlet three-way valve 5.1 is communicated with the main inlet pipe of the starting wellhead or the tunnel section, and the front end is respectively provided with a main inlet I valve 5.3 and a main inlet II valve 5.4. A first mud pipeline 8A communicated with the first inlet mud U-shaped pipe 2.1.1 is connected with the main inlet I valve 5.3, and a second mud pipeline 8B communicated with the second inlet mud U-shaped pipe 3.1.1 is connected with the main inlet II valve 5.4. When the rear end of the main inlet three-way valve 5.1 is communicated with the main inlet pipe of the starting wellhead or the tunnel section, a maintenance gate valve can be arranged to facilitate the start and stop of the main inlet three-way valve 5.1 during pipeline maintenance.

[0065] The rear end of the main outlet three-way valve 5.2 is communicated with the main outlet pipe of the starting well or the tunnel section, and the front end is respectively provided with a main outlet I valve 5.5 and a main outlet II valve 5.6. A first mud pipeline 8A communicated with the first outlet mud U-shaped pipe 2.1.2 is connected with the main outlet I valve 5.5, and a second mud pipeline 8B communicated with the second outlet mud U-shaped pipe 3.1.2 is connected with the main outlet II valve 5.6. When the rear end of the main outlet three-way valve 5.2 is communicated with the main outlet pipe of the starting well or the tunnel section, a maintenance gate valve can be arranged to facilitate the start and stop of the main outlet three-way valve 5.2 during pipeline maintenance.

[0066] Preferably, in the embodiment, the inlet mud I valve 2.4, the inlet mud III valve 2.5 and the main inlet I valve 5.3 are electrically and / or hydraulically connected, and can be synchronously controlled by the control system to ensure that the first inlet mud U-shaped pipe 2.1.1 is synchronously communicated with the first mud pipeline 8A.

[0067] The inlet mud II valve 3.4, the inlet mud IV valve 3.5 and the main inlet II valve 5.4 are electrically and / or hydraulically connected, and can be synchronously controlled by the control system to ensure that the second inlet mud U-shaped pipe 3.1.1 is synchronously communicated with the second mud pipeline 8B.

[0068] The outlet mud I valve 2.6, the outlet mud III valve 2.7 and the main outlet I valve 5.5 are electrically and / or hydraulically connected, and can be synchronously controlled by the control system to ensure that the first outlet mud U-shaped pipe 2.1.2 is synchronously communicated with the first mud pipeline 8A.

[0069] The outlet mud II valve 3.6, the outlet mud IV valve 3.7 and the main outlet II valve 5.6 are electrically and / or hydraulically connected, and can be synchronously controlled by the control system to ensure that the second outlet mud U-shaped pipe 3.1.2 is synchronously communicated with the second mud pipeline 8B.

[0070] In the embodiment, the front trolley 1.1 is provided with a first crane 1.3. The first crane 1.3 can move left and right and feed forward and backward along the trolley gantry, so as to realize precise hoisting and auxiliary installation of the stored extension pipe sections.

[0071] The first support 1.4 is arranged on the front trolley 1.1 opposite to the front sliding frame 2.2, and is used for storing and transporting a plurality of extension pipe sections.

[0072] The first storage box 1.5 is arranged at the bottom of the front trolley 1.1 corresponding to the position of the front sliding frame 2.2, and is used for collecting and processing waste slurry during pipe replacement.

[0073] Similarly, in the embodiment, the second crane 1.6 is arranged on the rear trolley 1.2, and can move left and right and feed forward and backward to realize accurate hoisting and auxiliary installation of the stored extension pipe sections.

[0074] The second support 1.7 is arranged on the rear trolley 1.2 opposite to the rear sliding frame 3.2, and is used for storing and transporting a plurality of extension pipe sections.

[0075] The second storage box 1.8 is arranged at the bottom of the rear trolley 1.2 corresponding to the position of the rear sliding frame 3.2, and is used for collecting and processing waste slurry during pipe replacement.

[0076] The embodiment provides a slurry balance shield tunneling machine, which comprises a shield main machine 9 and a pipe section extension device as described above, the pipe section extension device is connected with the shield main machine 9, and the shield main machine 9 is provided with an excavation system, a synchronous pushing and assembling system, a circulating system and a control system.

[0077] The excavation system is arranged at the most front part of the shield machine, and is used for stable and continuous excavation of a working face.

[0078] The synchronous pushing and assembling system comprises a pushing system, an assembling system and a pipe section storage and transportation system, and is used for continuous synchronous lining construction of an excavated tunnel.

[0079] The circulating system comprises a slurry discharge pump, a valve group and the like, a front end of the circulating system is in communication with an excavation bin and an air cushion cabin of the shield main machine, a rear end of the circulating system is in communication with the front cutting unit 4, and the circulating system is used for slurry supply and transportation of the trolley section.

[0080] The control system is arranged on the shield machine, and is used for electrical or liquid signal control of all systems / units of the shield machine.

[0081] In the embodiment, the excavation system, the synchronous pushing and assembling system, the circulating system and the control system all adopt existing technologies.

[0082] In the embodiment, the specific steps of the slurry balance shield machine for synchronous construction are as follows:

[0083] St1): as Figure 5When the shield machine is in the set initial position (the second extension unit 3, i.e. the left pipeline extension unit is connected to the mud pipeline 8 in the initial position in this embodiment), the first extension unit 2 is disconnected from the first mud pipeline 8A and moved forward to the initial position, at this time, the main inlet II valve 5.4, the main outlet II valve 5.6, the left pipeline valve group 8.2, the inlet mud IV valve 3.5, the outlet mud IV valve 3.7, the inlet mud II valve 3.4 and the outlet mud II valve 3.6 are opened; the main inlet I valve 5.3, the main outlet I valve 5.5, the right pipeline valve group 8.2, the inlet mud III valve 2.5, the outlet mud III valve 2.7, the inlet mud I valve 2.4 and the outlet mud I valve 2.6 are closed; the rest of the system works normally.

[0084] St2): as Figure 6 , the shield machine is continuously excavated for about one pipe changing stroke, the first extension unit 2 advances synchronously with the shield trolley, and the second extension unit 3 continuously compensates the advancing distance between the shield trolley by relying on the second U-shaped pipe group 3.1; when continuously excavating to meet one pipe changing distance L1 (in this embodiment, L1 is 11m), the first crane 1.6 is started to quickly hoist the extension pipe section 6 stored on the first support 1.4 to the right side of the first extension unit 2 and install the extension pipe section 6, and the right pipeline valve group 8.2 is opened;

[0085] St3): as Figure 7 , when one pipe changing stroke excavation is completed (the second extension unit moves backward to the set position), the front and rear switching units are synchronously switched by the control system, i.e. the main inlet I valve 5.3, the main outlet I valve 5.5, the inlet mud III valve 2.5, the outlet mud III valve 2.7, the inlet mud I valve 2.4 and the outlet mud I valve 2.6 are synchronously opened, so that the first extension unit 2 is connected with the circulating system 7, then the main inlet II valve 5.4, the main outlet II valve 5.6, the inlet mud IV valve 3.5, the outlet mud IV valve 3.7, the inlet mud II valve 3.4 and the outlet mud II valve 3.6 are closed, and the left pipeline valve group 8.2 adjacent to the second extension unit 3 is closed according to the actual situation;

[0086] St4): as Figure 8 , the shield machine continues to excavate, the second extension unit 3 is quickly disconnected and moved forward to the initial position, and the first extension unit 2 continuously compensates the advancing distance between the trolley by relying on the first U-shaped pipe group 2.1;

[0087] St5): as Figure 9 , when excavating to meet the left pipe changing distance, the second crane 1.6 is started for the first time to quickly hoist the extension pipe section 6 stored on the second support 1.7 to the left side of the second extension unit 3 and install the extension pipe section 6, at this time, the front part of the extension pipe section 6 is still disconnected from the second extension unit 3;

[0088] St6): as Figure 10, the shield machine continues to dig synchronously for about the next pipe changing stroke, the second extension unit 3 advances synchronously with the shield trolley, and the first extension unit 2 continues to extend backward by relying on the first U-shaped pipe group 2.1; when continuously digging to meet the next pipe changing distance L1, the second crane 1.6 is started again to quickly hoist the extension pipe section 6 stored on the second support 1.7 to the left side of the second extension unit 3, and the extension pipe section 6 is installed, and the left side pipe valve group 8.2 is opened;

[0089] St7) : as Figure 11 When the digging of another pipe changing stroke is completed (the first extension unit moves backward to the set position), the front and rear switching units are switched synchronously by the control system, that is, the main inlet II valve 5.4, the main outlet II valve 5.6, the inlet slurry IV valve 3.5, the outlet slurry IV valve 3.7, the inlet slurry II valve 3.4, and the outlet slurry II valve 3.6 are opened synchronously, so that the second extension unit 3 is in communication with the circulating system 7, and then the main inlet I valve 5.3, the main outlet I valve 5.5, the inlet slurry III valve 2.5, the outlet slurry III valve 2.7, the inlet slurry I valve 2.4, and the outlet slurry I valve 2.6 are closed, and the right side pipe valve group 8.2 adjacent to the first extension unit 2 is closed according to the actual situation;

[0090] St8) : the shield machine continues to dig, the first extension unit 2 is quickly disconnected and moves forward to the initial position, and the second extension unit 3 continuously compensates for the advancing distance between the trolley by relying on the second U-shaped pipe group 3.1;

[0091] St9) : as Figure 12 When digging to meet the right side pipe changing distance, the first crane 1.6 is started again to quickly hoist the extension pipe section 6 stored on the first support 1.4 to the right side of the first extension unit 2, and the extension pipe section 6 is installed, and at this time, the front part of the extension pipe section 6 is still disconnected from the first extension unit 2;

[0092] St10) : repeat the above steps St1-St9 to realize alternate pipe changing and uninterrupted digging until the tunnel construction is completed.

[0093] Example two

[0094] Referring to Figure 13 and Figure 14 The difference between this embodiment and example one is:

[0095] In this embodiment, the shield trolley 1 includes one trolley, and the shield trolley 1 is connected with the shield main machine 9.

[0096] The first U-shaped pipe group 2.1 is slidingly arranged on the top of the shield trolley 1, and the second U-shaped pipe group 3.1 is slidingly arranged above the first U-shaped pipe group 2.1.

[0097] The front sliding frame 2.2 and the rear sliding frame 3.2 are respectively arranged on the left and right sides of the shield trolley 1.

[0098] A pipeline hoist 10 is arranged on the shield jumbo, and is used for hoisting and assisting installation of the stored extension pipe sections.

[0099] Other structures of the embodiment are the same as those of the first embodiment, and will not be described herein.

[0100] The pipe section extension device provided by the embodiment has simple and compact structure, fully utilizes the space of the single jumbo, avoids occupying too much operation space of other devices, and improves the adaptability of the device.

[0101] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pipe section extending device, characterized by, The shield trolley (1), the first extension unit (2), the second extension unit (3), the front switching unit (4), the rear switching unit (5) and the extension pipe section (6) are included. The first extension unit (2) and the second extension unit (3) are slidably arranged on the shield trolley (1) along the tunneling direction; the first extension unit (2) and the second extension unit (3) are arranged in parallel. The front switching unit (4) is connected with the first extension unit (2) and / or the second extension unit (3) through the circulating system (7); the rear switching unit (5) is connected with the first extension unit (2) and the second extension unit (3) through the slurry pipeline (8); the first extension unit (2) and the second extension unit (3) are connected with the rear switching unit (5) through different slurry pipelines (8). The extension pipe section (6) is connected between the slurry pipeline (8) and the first extension unit (2) and / or the second extension unit (3); the extension pipe section (6) includes a straight pipe section.

2. The pipe section extending apparatus according to claim 1, wherein The shield trolley (1) includes at least two front trolleys (1.1) and rear trolleys (1.2) connected in series; the front trolley (1.1) is connected with the shield main machine (9); the first extension unit (2) is slidably arranged on the front trolley (1.1); the second extension unit (3) is slidably arranged on the rear trolley (1.2). Alternatively, the shield trolley (1) includes one trolley; the shield trolley (1) is connected with the shield main machine (9).

3. The pipe section extending apparatus according to claim 2, wherein The first extension unit (2) and the second extension unit (3) are provided with a bending hose group connected with the front switching unit (4); the bending hose group includes a first U-shaped pipe group (2.1) and a second U-shaped pipe group (3.1). The first U-shaped pipe group (2.1) is slidably arranged on the top of the front trolley (1.1); the second U-shaped pipe group (3.1) is slidably arranged on the top of the rear trolley (1.2). Alternatively, The first U-shaped pipe group (2.1) is slidably arranged on the top of the shield trolley (1); the second U-shaped pipe group (3.1) is slidably arranged above the first U-shaped pipe group (2.1).

4. The pipe section extending apparatus according to claim 3, wherein The first extension unit (2) further includes a front sliding frame (2.2) slidably arranged on the side of the shield trolley (1); a first elbow joint (2.3) is arranged on the front sliding frame (2.2); the first elbow joint (2.3) is connected with the first slurry pipeline (8A) and the first U-shaped pipe group (2.1); alternatively, the first elbow joint (2.3) is connected with the extension pipe section (6) and the first U-shaped pipe group (2.1). The second extension unit (3) includes a rear sliding frame (3.2) slidably arranged on the side of the shield trolley (1) opposite to the front sliding frame (2.2); a second elbow joint (3.3) is arranged on the rear sliding frame (3.2); the second elbow joint (3.3) is connected with the second slurry pipeline (8B) and the second U-shaped pipe group (3.1); alternatively, the second elbow joint (3.3) is connected with the extension pipe section (6) and the second U-shaped pipe group (3.1).

5. The pipe section extending apparatus according to claim 3, wherein The first U-shaped pipe group (2.1) comprises a first pulp feeding U-shaped pipe (2.1.1) and a first pulp discharging U-shaped pipe (2.1.2) arranged side by side, the first pulp feeding U-shaped pipe (2.1.1) is connected with the front switching unit (4) through a pulp feeding I valve (2.4) and connected with the first elbow joint (2.3) through a pulp feeding III valve (2.5); the first pulp discharging U-shaped pipe (2.1.2) is connected with the front switching unit (4) through a pulp discharging I valve (2.6) and connected with the first elbow joint (2.3) through a pulp discharging III valve (2.7); The second U-shaped pipe group (3.1) comprises a second pulp feeding U-shaped pipe (3.1.1) and a second pulp discharging U-shaped pipe (3.1.2) arranged side by side, the second pulp feeding U-shaped pipe (3.1.1) is connected with the front switching unit (4) through a pulp feeding II valve (3.4) and connected with the second elbow joint (3.3) through a pulp feeding IV valve (3.5); the second pulp discharging U-shaped pipe (3.1.2) is connected with the front switching unit (4) through a pulp discharging II valve (3.6) and connected with the second elbow joint (3.3) through a pulp discharging IV valve (3.7).

6. The pipe section extending apparatus according to claim 5, wherein The front switching unit (4) is arranged on the shield trolley (1) and comprises a pulp feeding tee (4.1) and a pulp discharging tee (4.2) arranged side by side, the output ends of the first pulp feeding U-shaped pipe (2.1.1) and the second pulp feeding U-shaped pipe (3.1.1) are connected with the pulp feeding tee (4.1), and the input ends of the first pulp discharging U-shaped pipe (2.1.2) and the second pulp discharging U-shaped pipe (3.1.2) are connected with the pulp discharging tee (4.2); The rear switching unit (5) is arranged at the starting well mouth or in the tunnel and connected with the mud separation station, the rear switching unit (5) comprises a main pulp feeding tee (5.1) and a main pulp discharging tee (5.2) arranged side by side, the mud pipeline (8) connected with the first pulp feeding U-shaped pipe (2.1.1) and the second pulp feeding U-shaped pipe (3.1.1) is connected with the main pulp feeding tee (5.1), and the mud pipeline (8) connected with the first pulp discharging U-shaped pipe (2.1.2) and the second pulp discharging U-shaped pipe (3.1.2) is connected with the main pulp discharging tee (5.2); The main pulp feeding tee (5.1) is provided with a main pulp feeding I valve (5.3) and a main pulp feeding II valve (5.4) on two branch pipelines respectively, and the main pulp discharging tee (5.2) is provided with a main pulp discharging I valve (5.5) and a main pulp discharging II valve (5.6) on two branch pipelines respectively.

7. The pipe section extending device according to any one of claims 1 to 6, characterized in that The shield trolley (1) is provided with a hoisting device, and the hoisting device is used for hoisting and auxiliary installation of the stored extension pipe joint (6).

8. The pipe section extending device according to any one of claims 1 to 6, characterized in that The shield trolley (1) is provided with a support, and the support is used for storing and transporting the extension pipe joint (6).

9. The pipe section extending device according to any one of claims 1 to 6, characterized in that Further comprising a storage box arranged at the bottom of the shield trolley (1) and used for storing waste pulp generated during pipe replacement.

10. A slurry balance tunnel boring machine characterized by, The shield trolley (1) is provided with a hoisting device, and the hoisting device is used for hoisting and auxiliary installation of the stored extension pipe joint (6).

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