CN-115992709-B - Mud circulation system

CN115992709BCN 115992709 BCN115992709 BCN 115992709BCN-115992709-B

Abstract

The embodiment of the application relates to a slurry circulation system, belonging to the technical field of tunnel construction equipment. The embodiment of the application aims to solve the technical problem that a slurry circulation system in the related art is weak in scouring performance and cannot be suitable for large-diameter or ultra-large-diameter tunnel engineering. The slurry circulation system comprises slurry treatment equipment, a slurry inlet pipeline assembly, at least one flushing pipeline assembly, a switching module and a booster pump, wherein the slurry inlet pipeline assembly is communicated with the slurry treatment equipment and the shield body and is used for conveying slurry from the slurry treatment equipment to the shield body, the at least one flushing pipeline assembly comprises a first flushing pipeline, a second flushing pipeline and a switching module, the first flushing pipeline is communicated with the slurry inlet pipeline assembly and the shield body, the second flushing pipeline is in parallel connection with the first flushing pipeline and is connected with the slurry inlet pipeline assembly and the shield body, the booster pump is arranged on the second flushing pipeline, and the switching module is used for adjusting flushing modes of the first flushing pipeline and the second flushing pipeline. The slurry circulation system can be suitable for large-diameter or ultra-large-diameter tunnel engineering.

Inventors

Qin Wangxing
ZHANG SHUAIKUN
XIONG CHENJUN
FAN RUIQIANG
WANG CHAOHUI
Xie jiao
TIAN JINKUN
ZHANG BAOZHEN

Assignees

中国铁建重工集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230118

Claims (8)

1. A mud circulation system, comprising: A slurry treatment device; The slurry inlet pipeline assembly is communicated with the slurry treatment equipment and the shield body and is used for conveying slurry from the slurry treatment equipment to the shield body; The flushing pipeline assembly comprises a first flushing pipeline, a second flushing pipeline and a switching module, and the first flushing pipeline is communicated with the slurry inlet pipeline assembly and the shield body; the second flushing pipeline is connected with the first flushing pipeline in parallel, the second flushing pipeline is connected with the pulp inlet pipeline assembly and the shield body, and a booster pump is arranged on the second flushing pipeline; The switching module comprises a first connecting pipeline and a second connecting pipeline which are mutually independent and are arranged in a crossing way, wherein the first end of the first connecting pipeline is connected with the first flushing pipeline, the second end of the first connecting pipeline is connected with the second flushing pipeline, the first end of the second connecting pipeline is connected with the second flushing pipeline, the second end of the second connecting pipeline is connected with the first flushing pipeline, the second flushing pipeline, the first connecting pipeline and the second connecting pipeline are all provided with switch valves, the switch valve on the first flushing pipeline is positioned between the first connecting pipeline and the second connecting pipeline, and the switch valve on the second flushing pipeline is positioned between the first connecting pipeline and the second connecting pipeline; At least one of the flush line assemblies includes at least one of a first flush line assembly, a second flush line assembly, and a third flush line assembly; the first flushing pipeline of the first flushing pipeline assembly is communicated to the excavation bin and is connected with the rotary joint assembly of the cutterhead; The first flushing pipeline of the second flushing pipeline assembly is communicated to the air cushion bin and faces the mud door; the second flushing pipeline of the second flushing pipeline assembly is communicated to the air cushion bin and faces the stone crusher; the first flushing pipeline and the second flushing pipeline of the third flushing pipeline assembly are communicated to the excavation bin and face the bottom of the excavation bin.
2. A mud circulation system according to claim 1, wherein the first flushing line and the second flushing line are connected with a first flushing nozzle at their ends remote from the feed line assembly.
3. A mud circulation system according to claim 2, wherein the first flushing nozzle comprises a first slurry inlet sub-line and at least one first slurry outlet sub-line in communication, the first slurry inlet sub-line having a first slurry inlet in communication with the first flushing line or the second flushing line, the first slurry outlet sub-line having a first slurry outlet, the first slurry outlet having a smaller diameter than the first slurry inlet.
4. A mud circulation system according to claim 2, wherein the first flushing nozzle comprises a second slurry inlet pipe, a hose and a second slurry outlet pipe which are communicated in sequence, and two motors, wherein one end of the second slurry inlet pipe away from the hose is provided with a second slurry inlet, and the second slurry inlet is communicated with one end of the first flushing pipe or the second flushing pipe; The end, far away from the hose, of the second slurry outlet pipeline is provided with a second slurry outlet, and the caliber of the second slurry outlet is smaller than that of the second slurry inlet; The two motors are respectively arranged at two sides of the second slurry inlet pipeline, steel wire ropes are wound on output shafts of the two motors, and end parts of the two steel wire ropes are respectively connected with two sides of the second slurry outlet pipeline.
5. A mud circulation system according to any one of claims 1-4, wherein the mud inlet pipe assembly comprises a main mud inlet pipe and a first branch pipe, the main mud inlet pipe is communicated with the first flushing pipe and the second flushing pipe, a first end of the first branch pipe is communicated with the main mud inlet pipe, a second end of the first branch pipe is communicated to the top of the air cushion bin and is used for inputting mud to the air cushion bin, the first branch pipe is provided with a first valve assembly, the first branch pipe is further connected with a bypass pipe, two ends of the bypass pipe are arranged at two ends of the first valve assembly in a straddling mode and are communicated with the first branch pipe, and a second valve assembly is arranged on the bypass pipe, and the pipe inner diameter of the bypass pipe is smaller than that of the main mud inlet pipe.
6. A mud circulation system as set forth in claim 5 wherein the mud inlet line assembly further comprises a second leg having a first end in communication with the main mud inlet line and a second end in communication with the excavation chamber, the second leg having an end remote from the main mud inlet line connected with a second flushing nozzle directed toward the cutterhead.
7. A mud circulation system according to claim 5, further comprising a communication pipeline vertically arranged in the air cushion bin, one end of the communication pipeline being located at the bottom of the air cushion bin, the other end of the communication pipeline being communicated to the top of the excavation bin; The pulp inlet pipeline assembly further comprises a third branch pipeline, the first end of the third branch pipeline is communicated with the pulp inlet main pipeline, the second end of the third branch pipeline is communicated with the communication pipeline, and a fourth valve assembly is arranged on the third branch pipeline.
8. A mud circulation system according to any one of claims 1-4, further comprising a mud discharge line assembly in communication with the mud treatment apparatus and the shield for transporting mud from the shield to the mud treatment apparatus.

Description

Mud circulation system Technical Field The embodiment of the application belongs to the technical field of tunnel construction equipment, and particularly relates to a slurry circulation system. Background At present, a tunnel with a large diameter or an ultra-large diameter is popularized and applied because of the advantage of being capable of intensively utilizing line resources. Large diameter or oversized tunnels are typically excavated using slurry balance shield machines. The slurry balance shield machine is provided with a slurry circulation system, and the slurry circulation system is used for maintaining the stability of an excavation surface and also is used for transporting a huge amount of slag stones generated by excavation. Meanwhile, the slurry circulation system also has a flushing function, and can flush an air cushion bin, an excavation bin, a cutterhead and the like of the slurry balance shield machine. In the related art, the slurry circulation system comprises slurry treatment equipment, a slurry inlet pipeline assembly, a slurry discharge pipeline assembly and a flushing pipeline assembly, wherein the slurry inlet pipeline assembly and the slurry discharge pipeline assembly are connected with the slurry treatment equipment and the shield body to form a slurry circulation path. The flushing line assembly is connected with the slurry inlet line assembly to introduce slurry from the slurry inlet line assembly into the shield body to flush areas within the shield body. However, the flushing performance of the slurry circulation system in the related art is weaker, so that the problems of mud cake formation, pipe blockage, pump blockage, bin blockage and the like of a cutterhead easily occur in the slurry balance shield machine, and the slurry balance shield machine cannot be suitable for large-diameter or ultra-large-diameter tunnel engineering. Disclosure of Invention In view of the above, the embodiments of the present application provide a slurry circulation system to solve the technical problem that the slurry circulation system in the related art has weak flushing performance and cannot be applied to large-diameter or ultra-large-diameter tunnel engineering. The slurry circulation system comprises slurry treatment equipment, a slurry inlet pipeline assembly and at least one flushing pipeline assembly, wherein the slurry inlet pipeline assembly is communicated with the slurry treatment equipment and a shield body and is used for conveying slurry from the slurry treatment equipment to the shield body, the flushing pipeline assembly comprises a first flushing pipeline, a second flushing pipeline and a switching module, the first flushing pipeline is communicated with the slurry inlet pipeline assembly and the shield body, the second flushing pipeline is in parallel connection with the first flushing pipeline, the second flushing pipeline is connected with the slurry inlet pipeline assembly and the shield body, a booster pump is arranged on the second flushing pipeline, and the switching module is connected with the first flushing pipeline and the second flushing pipeline and is used for adjusting the flushing modes of the first flushing pipeline and the second flushing pipeline. The slurry circulation system provided by the embodiment of the application has the advantages that the flushing pipeline components comprise the first flushing pipeline and the second flushing pipeline which are mutually parallel and are communicated with the shield body and the slurry treatment equipment, the second flushing pipeline is provided with the booster pump, the switching module is further connected between the first flushing pipeline and the second flushing pipeline, the switching module can adjust the flushing modes of the first flushing pipeline and the second flushing pipeline, the number of the flushing modes of the flushing pipeline components is increased, and the control precision of the flushing pipeline components is improved, so that the slurry circulation system provided by the embodiment of the application has stronger flushing performance under different geological conditions, is further suitable for large-diameter or ultra-large-diameter tunnel engineering, and improves the application range of the slurry balance shield machine. In some implementations including the foregoing embodiments, the switching module includes a first connection pipe and a second connection pipe that are independent and are disposed in a crossing manner, a first end of the first connection pipe is connected to the first flushing pipe, a second end of the first connection pipe is connected to the second flushing pipe, a first end of the second connection pipe is connected to the second flushing pipe, a second end of the second connection pipe is connected to the first flushing pipe, and switching valves are disposed on the first flushing pipe, the second flushing pipe, the first connection pipe, and the second c