CN110645009A - Water jet assisted rock breaking system and method carried on TBM - Google Patents
Water jet assisted rock breaking system and method carried on TBM Download PDFInfo
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- CN110645009A CN110645009A CN201911067836.2A CN201911067836A CN110645009A CN 110645009 A CN110645009 A CN 110645009A CN 201911067836 A CN201911067836 A CN 201911067836A CN 110645009 A CN110645009 A CN 110645009A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 239000011435 rock Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000008215 water for injection Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
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- 230000004048 modification Effects 0.000 description 3
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- 238000007689 inspection Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
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Abstract
The utility model provides a water jet assisted rock breaking system and method carried on a TBM, which comprises a water supply mechanism, a power mechanism and a transmission injection mechanism; the water supply mechanism and the power mechanism are both arranged at the front end of a first pulley connecting bridge of the TBM whole machine; the water supply mechanism provides a fluid source, the fluid is filtered and softened, the power mechanism can apply pressure to the fluid, the fluid with certain pressure can enter the transmission injection mechanism and is released to the TBM cutter head at the tail end of the transmission injection mechanism to form high-pressure jet flow, and the TBM cutter is assisted to break rock. The system can respond to different water jet target pressures and target flows by adjusting the integration number of the pressurizing branches; the safety valve and the pneumatic control unloading valve are arranged to adjust the fluid pressure, so that the transmission safety and the fluid pressure are ensured; the energy consumption in the fluid conveying process is reduced to the maximum extent through the selection and laying of the soft and hard pipes of the fluid conveying pipeline; the whole design is safe, reliable and feasible.
Description
Technical Field
The disclosure relates to a water jet assisted rock breaking system and method carried on a TBM.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, the rock tunnel excavation project in a deep-buried long and large tunnel project is extremely high in occupation ratio, and a TBM construction scheme is generally adopted. The traditional TBM adopts a mechanical rock breaking mode, and the principle of the traditional TBM is that under the combined action of normal force, rolling force and lateral force, a hob exerts pressure, rolling, grinding and other actions on rocks, so that the rocks generate a high-stress area and radial cracks, rock fragments are formed along with crack expansion, and the purpose of breaking the rocks is achieved.
When a tunnel rock tunneling machine (TBM) encounters hard rock with high surrounding pressure, the mechanical rock breaking capacity of the TBM is seriously insufficient, and a series of problems of low penetration, serious cutter abrasion, high proportion of cutter changing time and the like occur. According to statistics, the wear cost of the cutter and the maintenance and replacement time in the hard rock environment are 30-40% or more of the project cost and the construction period, the construction speed is seriously influenced, and the economic benefit is low. Therefore, how to efficiently break rock is a key theoretical and technical problem faced by the current TBM in tunneling hard rock.
Among a plurality of novel auxiliary rock breaking modes, water jet rock breaking has the characteristics of cleanness, environmental protection, low energy, high efficiency and easiness in realization, has abundant practical foundation in the fields of petroleum and mining, and has huge research and application potential in combination with the current TBM. At present, the concept of generating high-pressure water jet at a TBM cutter head and assisting a TBM hob to break rock is proposed and disclosed in a patent, however, the generation of the high-pressure water jet needs a whole set of high-pressure water generation, transmission and control system and a plurality of safety guarantee measures, and meanwhile, the problem that the high-pressure water jet system is compatible with the existing TBM structure and construction is fully considered, so that a plurality of technical problems need to be solved after the high-pressure water jet system is really implemented.
The existing high-pressure water jet system mainly comprises a high-pressure pump, a motor, an energy storage device, a transmission pipeline and the like, and is easy to realize due to few constraint conditions in a laboratory environment. However, designing a mountable water jet system in a tunnel rock boring machine having a narrow working environment and a large number of mounting tools is often complicated. Firstly, the reasonable compatibility with the structure of the current TBM must be considered, and the compatibility is mainly expressed in the reasonable arrangement of each component of the water jet system on the TBM, for example, a bulky high-pressure pump set which is difficult to install in a cutter head, when the TBM is carried, the convenience of daily work such as inspection, maintenance and the like of the water jet system is considered, and the distance between the TBM and the cutter head is also considered, wherein the closer the distance is, the shorter the high-pressure water transmission pipeline is, the smaller the energy loss in the high-pressure water transmission process is, and the transmission risk is also relatively reduced; meanwhile, the high-pressure pump set has the function of quickly expanding power so as to meet the requirement of generating high-pressure water jets with different flow rates, and the problem of how to form the high-pressure pump set needs to be considered. Secondly, the stability of jet injection pressure and the safe transmission of high-pressure fluid must be considered, namely, the water jet auxiliary system has the functions of rapid pressure compensation and safe pressure relief, so that the rock breaking effect of jet auxiliary can be ensured, and abnormal high pressure can be timely reduced. Thirdly, under the condition that the jet pressure and the rock breaking capacity are in positive correlation, the pressure loss problem caused by the turning, diameter changing and self deformation of the pipeline in the high-pressure water transmission process must be considered, otherwise, the auxiliary effect of the water jet on the hob is difficult to ensure. In addition, different from a water jet system assembled in a laboratory, the TBM serving as a dynamic carrying platform of the water jet auxiliary system can be influenced by various factors difficult to estimate in construction, and the safety and reliability problems of the high-pressure water jet auxiliary rock breaking system are very severe.
In a word, if the high-pressure water jet assisted TBM hob rock breaking is to be realized, a series of technical innovations must be purposefully provided based on a high-pressure water jet system, a TBM structure and construction characteristics, so that a set of water jet assisted rock breaking system and method carried on the TBM is formed, the safety and reliability of high-pressure water generation, transmission and release are guaranteed, and the effectiveness and feasibility of water jet assisted TBM hob rock breaking construction are guaranteed.
Disclosure of Invention
The invention provides a water jet assisted rock breaking system and method carried on a TBM (tunnel boring machine) to solve the problems, and the system and method can solve the contradiction that the available space of the existing tunnel rock heading machine is narrow and the water jet generating equipment is large in size; the safety and reliability of high-pressure water generation, transmission and release can be guaranteed, the pressure loss of high-pressure water transmission can be reduced to the maximum extent, the method is compatible with the TBM construction process, and the effectiveness and feasibility of water jet assisted TBM hob rock breaking construction are guaranteed.
According to some embodiments, the following technical scheme is adopted in the disclosure:
a water jet assisted rock breaking system carried on a TBM comprises a water supply mechanism, a power mechanism and a transmission injection mechanism, wherein:
the water supply mechanism and the power mechanism are both arranged at the front end of a first pulley connecting bridge of the TBM whole machine; the power mechanism can apply pressure to the fluid, and the fluid with certain pressure can enter the transmission injection mechanism and is released to the TBM cutter disc at the tail end of the transmission injection mechanism to form high-pressure jet flow.
As an optional scheme, the power mechanism is installed on one side close to the main beam of the TBM, and the water supply mechanism is installed on one side far away from the main beam of the TBM. The design can ensure that the fluid enters the TBM main beam after being pressurized by the power mechanism, and the fluid running process is free from obstruction and the path is smooth.
As an optional scheme, the water supply mechanism comprises a filter system and a water storage device, wherein the filter system is connected with the water storage device by adopting a connecting pipeline; and the filtering system is connected with a water pipeline for TBM construction through a connecting pipeline.
Further alternatively, the low-pressure hose is selected for both of the two connecting lines.
As an alternative, the filtering system consists of a filter bag type coarse filter, a filter element type precise filter and a water softening device;
further optionally, the filtration precisions of the filter bag type coarse filter and the filter element type precise filter are respectively 8-15 microns and 1-5 microns; the design can ensure the service life of the high-pressure sealing element, and meanwhile, the abnormal rise of the system pressure caused by the blockage of the nozzle is avoided.
As a further limitation, the TBM construction water provided to the water supply mechanism needs to be subjected to water quality detection, including PH, turbidity, total hardness, metal ion content, and the like, and after being softened by the water softening device, each index is within a specified range, so that abrasion and erosion of the power mechanism and the transmission injection mechanism by high-pressure water can be effectively avoided, and the stability and safety of the water jet assisted rock breaking system are ensured.
As an optional scheme, the power mechanism comprises a plurality of pressurization branches connected in parallel, the pressurization branches are gathered together through a confluence device, each pressurization branch comprises an energy accumulator, an ultrahigh pressure plunger pump and a motor, the confluence device and the energy accumulator, the energy accumulator and the ultrahigh pressure plunger pump are connected through high-pressure hard pipes, and the ultrahigh pressure plunger pump is connected with the water storage device through a low-pressure hose. The motor provides a power source for the ultrahigh pressure plunger pump.
As a further limitation, a pneumatic control unloading valve is installed at the hydraulic end of the ultrahigh pressure plunger pump, the output pressure of the ultrahigh pressure plunger pump can be effectively adjusted through the change of air pressure, and unloading overflow water is discharged out of the equipment through a hose.
As a further limitation, at least one motor on the pressurizing branch has a frequency conversion function and is matched with a pneumatic control unloading valve to realize continuous and rapid adjustment of the output pressure of the ultrahigh pressure plunger pump.
As a further limitation, a safety valve is provided on the confluence device. The high-pressure water in the confluence device is regulated by a safety valve, so that the pressure of the high-pressure water flowing into the transmission injection mechanism can be effectively controlled, and the use safety of each component in the transmission injection mechanism is ensured.
By way of further limitation, the number of said pressurized branches is determined according to the pressure requirement and the flow requirement of the high pressure water.
As an optional scheme, high-pressure water generated by the pressurization branch in the confluence device is regulated and divided into two paths through a safety valve, one path flows into the transmission injection mechanism to finally form high-pressure jet, and the other path flows to the water storage device through a high-pressure hard pipe return pipe.
As an optional scheme, the conveying and spraying mechanism comprises a water jet nozzle, a high-pressure hard pipe arranged in the cutter head, a flow divider, a rotary joint and a conveying pipeline. The transmission pipeline comprises three sections which are connected in sequence, the middle of the transmission pipeline is a high-pressure hard pipe main pipe fixed in the TBM main beam, the two ends of the transmission pipeline are high-pressure hoses, the high-pressure hose at one end is connected with the confluence device in the power mechanism, and the high-pressure hose at the other end is connected with the rotary joint. The rotary joint is connected with the flow divider, the flow divider divides fluid with pressure into a plurality of branches, the number of the water jet nozzles is a plurality, and each branch flows to the corresponding water jet nozzle through the high-pressure hard pipe arranged in the cutter head.
The high-pressure hose has certain flexibility and can generate certain bending and telescopic deformation, and the high-pressure hard pipe can be regarded as a rigid pipeline, and the bending and telescopic deformation of the high-pressure hard pipe is ignored. The high pressure and the low pressure refer to a pressure of the fluid after pressurization and a pressure of the normal fluid, respectively. High-pressure hard pipe/high-pressure hose refers to a hard pipe/hose capable of bearing the pressure of pressurized fluid; a low pressure hose is a hose that carries non-pressurized fluid.
The working method based on the system comprises the following steps:
filtering and softening the water for injection, and storing a certain amount of water for injection;
the generated high-pressure water is sprayed out by a water jet nozzle to assist the hob to break rock.
Compared with the prior art, the beneficial effect of this disclosure is:
the practical situation that high-pressure water generating equipment cannot be loaded in an existing TBM cutter head is considered fully, the internal space environment of an existing TBM host and a first pulley is considered fully, the safety, reliability and effectiveness of the use of a high-pressure water jet system are combined, a set of water jet auxiliary rock breaking system carried on the TBM is designed, the system can deal with different water jet target pressures and target flows by adjusting the integration number of pressurizing branches, the high-pressure water jet and a TBM hob are matched with each other, the abrasion of the hob is reduced, the penetration of the hob is improved, and the realization of the existing water jet auxiliary TBM rock breaking concept becomes possible.
According to the TBM complete machine first pulley connecting bridge, the power mechanism and the water supply mechanism which are large in size are arranged at the front end of the TBM complete machine first pulley connecting bridge, the space is feasible to use, and is relatively large, so that the integrated use of a plurality of pressurizing branches is facilitated, and the inspection, maintenance and repair of equipment are facilitated; the space is closest to the cutter head, so that the total length of the high-pressure water transmission pipeline is reduced, and the energy loss of high-pressure water transmission is further reduced; the problem that large-size high-pressure water generating equipment is reasonably carried on the TBM is solved.
According to the cutter head, the high-pressure hard pipe is arranged in the cutter head, and the high-pressure hard pipe main pipe adopts hard pipelines, so that the pressure loss of high-pressure water in the transmission process is reduced.
In the method, the longest (the length is generally more than 10 meters) transmission pipeline-high-pressure hard pipe main pipe in the transmission injection mechanism is fixed in the TBM main beam, so that on one hand, the purpose of adopting a linear design is realized, the high-pressure water is prevented from flowing in a direction-changing manner, and the pressure loss of the high-pressure water in the transmission process is greatly reduced; on the other hand, the connection difficulty between the high-pressure hard pipe main pipe and the rotary joint and between the high-pressure hard pipe main pipe and the confluence device is reduced, the high-pressure water is smoothly transmitted, and the pressure loss is further reduced; in addition, the high-pressure hard pipe main pipe is fixed inside the TBM main beam and is protected by the strong force of the TBM main beam, so that the risk of high-pressure water transmission caused by unexpected factors in construction is greatly reduced, and the reliability of the water jet auxiliary system is improved.
The pneumatic control unloading valve is mounted at the hydraulic end of the ultrahigh pressure plunger pump, so that the output pressure of the ultrahigh pressure plunger pump can be effectively adjusted; at least one pressurizing branch is provided with a variable frequency motor which is matched with a pneumatic control unloading valve to realize continuous and rapid adjustment of the output pressure of the ultrahigh pressure plunger pump; the confluence device is provided with a safety valve to ensure the stability of the fluid pressure in the transmission injection mechanism; the scheme provides guarantee for the pressure controllability and the safety controllability of the whole water jet auxiliary system.
The application method of the water jet assisted rock breaking system is provided by combining the characteristics of the water jet assisted rock breaking system carried on the TBM, is practical and feasible, and is easy to popularize.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic overall structure of the present disclosure;
fig. 2 is a schematic structural diagram of the power mechanism and the water supply mechanism of the present disclosure;
the water supply system comprises a water supply mechanism 1, a filtering system 11, a water storage device 12, a power mechanism 2, a motor 21, an ultrahigh pressure plunger pump 22, an energy accumulator 23, a confluence device 24, a safety valve 25, a high-pressure hard tube return pipe 26, a high-pressure hose I, a high-pressure hard tube main pipe 32, a high-pressure hose II, a high-pressure hose 34, a high-pressure hard tube arranged in a cutter head, a rotary joint 4, a flow divider 5, a water jet nozzle 6, a cutter head 81, a 82.TBM main beam 83 and a first pulley connecting bridge.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
A water jet assisted rock breaking system carried on a full-face Tunnel Boring Machine (TBM) comprises a numerical control console beneficial to remote control, a water supply mechanism 1 convenient for using TBM construction water, a power mechanism 2 convenient for splicing and integrating according to target flow and injection pressure, and a transmission injection mechanism beneficial to reducing pressure loss and ensuring application safety, as shown in figure 1.
Water supply mechanism 1, power unit 2 install in the front end of a TBM complete machine coaster connecting bridge 83, and power unit installs in the one side of being close to TBM girder 82, and water supply mechanism installs in the one side of keeping away from the TBM girder, guarantees that the fluid gets into the TBM girder after power unit's pressurization, and the fluid operation process is unimpeded, and the route is unobstructed.
As shown in fig. 2, the water supply mechanism 1 comprises a filtering system 11 and a water storage device 12, wherein the filtering system 11 and the water storage device 12 are connected by a low-pressure hose; the filter system 11 introduces the TBM construction water for use through a low-pressure hose.
The filtering system consists of a filter bag type coarse filter, a filter element type precise filter and a water softening device; the filtering precisions of the filter bag type coarse filter and the filter element type precise filter can be respectively preferably 8-15 micrometers and 1-5 micrometers, large-diameter magazine particles in water are filtered, the service life of a high-pressure sealing element is ensured, and abnormal rise of system pressure caused by nozzle blockage is avoided. The water softening device is used for carrying out water quality detection and softening treatment on filtered water, the detection content comprises a pH value, turbidity, total hardness, metal ion content and the like, after softening, all indexes of the water are in a specified range, abrasion and erosion of high-pressure water to the power mechanism and the transmission injection mechanism are effectively avoided, and the stability and safety of the water jet assisted rock breaking system are guaranteed.
As shown in fig. 2, the power mechanism 2 includes a motor 21, an ultrahigh pressure plunger pump 22, an accumulator 23, and a confluence device 24. The ultrahigh pressure plunger pump 22 and the energy accumulator 23, and the energy accumulator 23 and the confluence device 24 are all connected by high pressure hard pipes, and the confluence device 24 is provided with a safety valve 25. When a large flow of high pressure water is required to be generated, a plurality of groups of pressurizing branches can be used in parallel, and two pressurizing branches are included in the embodiment. High-pressure water generated by the two pressurizing branches is converged into the confluence device 24, the high-pressure water in the confluence device 24 is regulated by the safety valve 25 and divided into two paths, one path flows into the high-pressure hose I31 to finally form high-pressure jet, and the other path flows to the water storage device 12 through the high-pressure hard pipe return pipe 26. The high-pressure water in the confluence device 24 can effectively control the pressure of the high-pressure water flowing into the transmission injection mechanism under the regulation of the safety valve 25, and the use safety of each component in the transmission injection mechanism is ensured.
The hydraulic end of the ultrahigh pressure plunger pump 22 is provided with a pneumatic control unloading valve, the output pressure of the ultrahigh pressure plunger pump can be effectively adjusted through the change of air pressure, and unloading overflow water is discharged out of the equipment through a hose. At least one motor 21 on the pressurizing branch has a frequency conversion function and is matched with a pneumatic control unloading valve to realize continuous and rapid adjustment of the output pressure of the ultrahigh pressure plunger pump.
As shown in fig. 1, the transmission injection mechanism is composed of a water jet nozzle 6, a high-pressure hard pipe 34 arranged in a cutter head, a flow divider 5, a rotary joint 4, a high-pressure hose ii 33, a high-pressure hard pipe main pipe 32 and a high-pressure hose i 31, which are connected with one another in the listed sequence. The water jet nozzles 6 are arranged on the working surface of the cutter disc 81, each water jet nozzle 6 is connected with a cutter disc built-in high-pressure hard pipe 34, the cutter disc built-in high-pressure hard pipes 34 are connected with a flow divider 5 arranged in the center of the back of the cutter disc 81, and the flow divider 5 is connected with a high-pressure hose II 33 for supplying water outside the cutter disc through a rotary joint 4. The high-pressure hard pipe main pipe 32 is a linear pipeline and is fixed in the TBM main beam 82, the front end of the high-pressure hard pipe main pipe is connected with the rotary joint 4 through a high-pressure hose II 33, and the rear end of the high-pressure hard pipe main pipe is connected with the confluence device 24 through a high-pressure hose I31.
The numerical control of the supplementary broken rock system of water jet controls the platform and sets up in the TBM master control room, makes things convenient for driver remote operation, and the numerical control is controlled the platform and is passed through electric wire, data line and water supply mechanism, power unit connection.
In this embodiment, an application method of the water jet assisted rock breaking system mounted on a full face Tunnel Boring Machine (TBM) is as follows:
1. when the water jet auxiliary rock breaking system needs to be started, firstly, the system is checked, potential safety hazards are eliminated, and particularly the reliability and safety of some important components or parts (such as the rotary joint 4, the high-pressure hose II 33, the high-pressure hose I31 and the like) are improved; the filtering system 11 is turned on to filter and soften the construction water introduced therein so that a certain amount of spray water is stored in the reservoir 12.
2. The device comprises two pressurizing branches, after the step 1 is completed, the motors 21 in the two pressurizing branches are simultaneously started through a numerical control switch, high-pressure water formed under the pressurizing effect of an ultrahigh-pressure plunger pump 22 flows into a confluence device 24 through an energy accumulator 23 under the constant pressure effect, the high-pressure water in the confluence device 24 is regulated through a safety valve 25, one part of the high-pressure water flows back to a water storage device 12, the other part of the high-pressure water flows into a transmission injection mechanism and is finally sprayed out through a plurality of water jet nozzles 6 on a cutter head 81 to assist the hob in rock breaking.
3. When the next construction step still needs to start the water jet auxiliary system, the steps are repeated.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. A water jet assisted rock breaking system carried on a TBM is characterized in that: including water supply mechanism, power unit and transmission injection mechanism, wherein:
the water supply mechanism and the power mechanism are both arranged at the front end of a first pulley connecting bridge of the TBM whole machine; the power mechanism can apply pressure to the fluid, and the fluid with certain pressure can enter the transmission injection mechanism and is released to the TBM cutter disc at the tail end of the transmission injection mechanism to form high-pressure jet flow.
2. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the power mechanism is installed on one side close to the TBM girder, and the water supply mechanism is installed on one side far away from the TBM girder.
3. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the water supply mechanism comprises a filter system and a water storage device, and the filter system is connected with the water storage device through a connecting pipeline; and the filtering system is connected with a water pipeline for TBM construction through a connecting pipeline. The filtering system consists of a filter bag type coarse filter, a filter element type precise filter and a water softening device; the filtration precision may generally be preferably 8-15 microns and 1-5 microns, respectively.
4. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the power mechanism comprises a plurality of parallel pressurizing branch circuits, the pressurizing branch circuits are gathered together through a confluence device, each pressurizing branch circuit comprises an energy accumulator, an ultrahigh pressure plunger pump and a motor, the confluence device is connected with the energy accumulator, the energy accumulator and the ultrahigh pressure plunger pump through high-pressure hard pipes, and the ultrahigh pressure plunger pump is connected with the water receiver through a low-pressure hose.
5. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the hydraulic end of the ultrahigh pressure plunger pump is provided with a pneumatic control unloading valve, and at least one motor on the pressurizing branch has a frequency conversion function.
6. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the confluence device is provided with a safety valve.
7. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: high-pressure water generated by a pressurizing branch in the confluence device is regulated and divided into two paths by a safety valve, one path of the high-pressure water flows into the transmission injection mechanism to finally form high-pressure jet, and the other path of the high-pressure jet flows to a water storage device through a high-pressure hard pipe return pipe.
8. A water jet assisted rock breaking system carried on a TBM as claimed in claim 1 wherein: the transmission injection mechanism comprises a water jet nozzle, a high-pressure hard pipe arranged in a cutter head, a flow divider, a rotary joint and a transmission pipeline; the transmission pipeline comprises three sections which are sequentially connected, the middle of the transmission pipeline is a high-pressure hard pipe main pipe fixed in the TBM main beam, two ends of the transmission pipeline are high-pressure hoses, the high-pressure hose at one end is connected with a confluence device in the power mechanism, and the high-pressure hose at the other end is connected with the rotary joint; the rotary joint is connected with the flow divider, the flow divider divides fluid with pressure into a plurality of branches, the number of the water jet nozzles is a plurality, and each branch flows to the corresponding water jet nozzle through the high-pressure hard pipe arranged in the cutter head.
9. Method of operating a system according to any of claims 1 to 8, characterized in that: the method comprises the following steps:
filtering and softening the water for injection, and storing a certain amount of water for injection;
the generated high-pressure water is sprayed out by a water jet nozzle to assist the hob to break rock.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112196571A (en) * | 2020-09-30 | 2021-01-08 | 中国铁建重工集团股份有限公司 | Abrasive jet flow auxiliary mechanical rock breaking system and method |
Families Citing this family (12)
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| CN109779647A (en) * | 2019-02-21 | 2019-05-21 | 山东大学 | The water jet auxiliary rock system and method being equipped on TBM |
| CN110108588B (en) * | 2019-05-22 | 2021-07-20 | 中南大学 | High-pressure water jet hobbing cutter multi-degree-of-freedom composite rock breaking experimental device |
| CN110318765B (en) * | 2019-07-02 | 2020-08-21 | 中国科学院武汉岩土力学研究所 | Mechanical-hydraulic combined rock breaking TBM real-time tunneling method based on lithology recognition |
| CN110529137B (en) * | 2019-08-28 | 2021-07-02 | 中铁工程装备集团有限公司 | Pressure stabilizing system and pressure stabilizing method of high-pressure water jet system carried on TBM |
| CN110454185B (en) * | 2019-08-28 | 2021-09-17 | 中铁工程装备集团有限公司 | High-pressure water assisted rock breaking system for tunnel boring machine and construction method |
| CN110410093A (en) * | 2019-08-31 | 2019-11-05 | 中铁工程装备集团有限公司 | A kind of high pressure water cavitation broken rock TBM and its construction method |
| CN110482648A (en) * | 2019-08-31 | 2019-11-22 | 中铁工程装备集团有限公司 | Carry the water sofening treatment system and softening method of TBM high pressure water coincidence broken rock |
| CN110735646A (en) * | 2019-09-24 | 2020-01-31 | 中国地质大学（武汉） | TBM high-voltage pulse water jet auxiliary rock breaking device |
| CN111624087B (en) * | 2020-04-20 | 2021-08-27 | 山东大学 | Horizontal jet-mechanical combined rock breaking test device and method |
| CN111577305B (en) * | 2020-05-13 | 2021-06-22 | 中南大学 | Water jet nozzle device suitable for assisting hob to break rock and arrangement method thereof |
| CN112196564B (en) * | 2020-10-13 | 2022-10-18 | 盾构及掘进技术国家重点实验室 | Rotary valve group for rock breaking by combining high-pressure water jet and hobbing cutter |
| CN112610235B (en) * | 2020-12-24 | 2023-06-20 | 中国铁建重工集团股份有限公司 | Plug-and-play water jet auxiliary rock breaking equipment suitable for TBM |
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| CN205823287U (en) * | 2016-08-09 | 2016-12-21 | 黄河勘测规划设计有限公司 | Ultrahigh pressure auxiliary rock TBM cutterhead |
| CN109779647A (en) * | 2019-02-21 | 2019-05-21 | 山东大学 | The water jet auxiliary rock system and method being equipped on TBM |
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| KR101416716B1 (en) * | 2013-07-19 | 2014-07-09 | 경일건설(주) | rotary table of excavation device of having water jet |
| CN206144564U (en) * | 2016-09-19 | 2017-05-03 | 南昌大学 | System is prevented and treated to earth pressure balance shield mud cake based on synchronous efflux |
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| CN205823287U (en) * | 2016-08-09 | 2016-12-21 | 黄河勘测规划设计有限公司 | Ultrahigh pressure auxiliary rock TBM cutterhead |
| CN109779647A (en) * | 2019-02-21 | 2019-05-21 | 山东大学 | The water jet auxiliary rock system and method being equipped on TBM |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196571A (en) * | 2020-09-30 | 2021-01-08 | 中国铁建重工集团股份有限公司 | Abrasive jet flow auxiliary mechanical rock breaking system and method |
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