CN107091100A - A kind of abrasion reducing system of rectangular pipe jacking machine - Google Patents
A kind of abrasion reducing system of rectangular pipe jacking machine Download PDFInfo
- Publication number
- CN107091100A CN107091100A CN201710432881.8A CN201710432881A CN107091100A CN 107091100 A CN107091100 A CN 107091100A CN 201710432881 A CN201710432881 A CN 201710432881A CN 107091100 A CN107091100 A CN 107091100A
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- Prior art keywords
- foam
- liquid
- mixing liquid
- flow
- gas
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The present invention provides a kind of abrasion reducing system of rectangular pipe jacking machine, including foam-generating device, the foam-generating device includes the first controller, gas supply assembly, foam mixing liquid conveying assembly and the gas-liquid mixed component for supply gas to be mixed with foam mixing liquid, the gas supply assembly includes being used for the first flowmeter of detection supply gas flow and the flow valve for adjusting supply gas flow, the foam mixing liquid conveying assembly includes the first delivery pump for being used to convey foam mixing liquid, first controller sends control instruction to flow valve and the first delivery pump respectively according to the detection signal of first flowmeter, the conveying capacity of control supply gas outflow amount and foam mixing liquid.The present invention has control accurate, simple and reliable, and the advantages of service life.
Description
Technical field
The present invention relates to push-bench technical field, more particularly to a kind of abrasion reducing system of rectangular pipe jacking machine.
Background technology
With the development of domestic underground engineering, current subway gateway walkway and street underground pedestrian passageway are increasingly
Many use shield push-bench are constructed.It is existing because rectangular cross section is bigger by 20% or so than effective usable floor area of circular cross section
There is shield push-bench using rectangular cross section so that tunnel utilization space economical rationality, but it is complicated to there is construction geology, need to be to quarrel soil
The problem of being improved.Existing mode is to improve cutterhead abrasion and soil pressure performance, but existing rectangular pipe jacking machine using foam
There is problems with abrasion reducing system：1st, foam-generating device uses closed-loop control, and Xu Ge roads are respectively provided with flow control feedback, and it is controlled
System is complicated, and foam has certain corrosivity, sets multiple traffic detector to require high to material corrosion resistance, cost is high；
2nd, in progradation, push-bench tube coupling is big with soil layer periphery wear, and equipment operational reliability and security are low.
The content of the invention
The technical problem to be solved in the present invention be overcome the deficiencies in the prior art there is provided one kind control it is accurate, simple and reliable,
And the abrasion reducing system of the high rectangular pipe jacking machine of service life.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of abrasion reducing system of rectangular pipe jacking machine, including foam-generating device, the foam-generating device include the first control
Device processed, gas supply assembly, foam mixing liquid conveying assembly and the gas-liquid mixed group for supply gas to be mixed with foam mixing liquid
Part, the gas supply assembly includes being used for the first flowmeter of detection supply gas flow and the stream for adjusting supply gas flow
Valve is measured, the foam mixing liquid conveying assembly includes the first delivery pump for being used to convey foam mixing liquid, first controller
Control instruction is sent to flow valve and the first delivery pump, control supply gas output according to the detection signal of first flowmeter respectively
The conveying capacity of flow and foam mixing liquid.
It is used as the further improvement of above-mentioned technical proposal：
The gas supply assembly also includes steam line, filtering pressure reducing valve and the pressure gauge for detecting supply gas pressure,
The pressure gauge, flow valve and first flowmeter are located at the downstream of the filtering pressure reducing valve on the steam line.
The foam mixing liquid conveying assembly also includes mixed liquor conveyance conduit and flow indicator, the flow indicator
On the mixed liquor conveyance conduit, and positioned at the downstream of first delivery pump.
Be equipped with steam line and the mixed liquor conveyance conduit for control pipeline break-make stop valve and prevent gas
The check valve that liquid flows backwards.
The foam-generating device also includes foam mixing liquid and produces component, and the foam mixing liquid, which produces component, includes the
Two controllers, water supplying unit, foam dope supply unit and the mixed liquor generation unit for foam dope to be mixed with water, institute
The second flowmeter that water supplying unit includes being used to detect water-carrying capacity is stated, the foam dope supply unit includes conveying foam dope
The second delivery pump, the second controller sends control instruction to the second delivery pump according to the detection signal of second flowmeter,
Control the conveying capacity of foam dope.
The water supplying unit also includes water supply line, and the foam dope supply unit also includes stoste conveyance conduit, institute
State water supply line to connect with mixed liquor generation unit by connecting pipe with stoste conveyance conduit, the connecting pipe is provided with use
In the filter filtered to foam mixing liquid.
The ball valve of control pipeline break-make is equipped with the water supply line and stoste conveyance conduit and prevents what liquid from flowing backwards
Check-valves, the check-valves is located at the downstream of ball valve.
The mixed liquor generation unit includes foams mix liquid storage tank and three groups of limits for detecting foam mixing liquid liquid level
Bit switch, limit switch described in three groups includes preventing foams mix along what foams mix liquid storage tank side wall was sequentially arranged from top to bottom
The first liquid-level switch that hydrorrhea goes out, the second liquid-level switch for ensureing foams mix liquid storage tank storage normal level amount and prevent first
3rd liquid-level switch of delivery pump free-runing operation.
Also include to bentonitic bentonite pumping installations is pumped between push-bench section of jurisdiction and soil layer, the bentonite is pumped
Device is located at the middle shield of the push-bench, and positioned at the first half of the middle shield.
The bentonite pumping installations includes being radially injected hole along the middle shield first half circumferentially multiple, noted located at radial direction
Enter the flow-guiding channel at hole and multiple flow guide bars in flow-guiding channel along the middle shield first half circumferentially, the flow-guiding channel
Shield to the direction of tail shield is set in, and the flow guide bar is parallel with the tunneling direction of rectangular pipe jacking machine.
Compared with prior art, the advantage of the invention is that：
The present invention is detected using flowmeter to supply gas flow, is realized by the detection to gas flow with feedback
The accurate control of foam mixing liquid injection rate, the i.e. injection rate of foam mixing liquid use open loop control with supply gas flow proportion
System, and realized by the flowmeter of one group of detection air mass flow, it effectively prevent sets flow control using closed-loop control Xu Ge roads
The situation of feedback is made, system complexity is effectively reduced, controlled simple and reliable；Meanwhile, set one group of flowmeter effectively to reduce
Replacement cost of the flowmeter under corrosive environment, service life of equipment is high.
The present invention further uses bentonite pumping installations, bentonite slurry is pumped between section of jurisdiction and soil layer, to shield
Body case plays lubrication and protective effect with soil layer, which further reduces abrasion of the tube coupling in progradation, effectively protection
Tube coupling, improves the security and reliability of equipment operation, meanwhile, can effectively it be filled between section of jurisdiction using bentonitic dilatancy
Gap, plays a part of preventing stratum from loosening, supports the solidification soil body.The bentonite pumping installations of the present invention further comprises that water conservancy diversion leads to
Road and flow guide bar, flow-guiding channel ensure that bentonite slurry shield in spreads to tail shield, serve the work of the protection to shield body shell
With；Meanwhile, flow guide bar is parallel with the tunneling direction of rectangular pipe jacking machine, and it is swollen in mud solidification preacceleration using surface tension of liquid
Diffusion of the native mud of profit between soil layer and shield body gap so that bentonite slurry is uniformly distributed between shield body shell and soil layer, profit
In subsequent construction.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein：
Fig. 1 is the structural representation of foam-generating device of the present invention.
Fig. 2 is the structural representation that foam mixing liquid of the present invention produces component.
Fig. 3 is the structural representation of bentonite pumping installations of the present invention in a particular application.
Fig. 4 is the enlarged diagram in Fig. 3 A portions.
Fig. 5 is the distribution schematic diagram of flow guide bar of the present invention.
Each label is represented in figure：
1st, gas supply assembly；11st, first flowmeter；12nd, flow valve；13rd, steam line；14th, filtering pressure reducing valve；15th, pressure
Table；2nd, foam mixing liquid conveying assembly；21st, the first delivery pump；22nd, mixed liquor conveyance conduit；23rd, flow indicator；3rd, gas-liquid
Electric hybrid module；4th, stop valve；5th, check valve；6th, foam mixing liquid produces component；61st, water supplying unit；611st, second flowmeter；
612nd, water supply line；613rd, pneumatic ball valve；62nd, foam dope supply unit；621st, the second delivery pump；622nd, stoste delivery pipe
Road；623rd, foam dope tank；624th, the 4th limit switch；63rd, mixed liquor generation unit；631st, foams mix liquid storage tank；632、
First liquid-level switch；633rd, the second liquid-level switch；634th, the 3rd liquid-level switch；64th, connecting pipe；65th, filter；66th, ball valve；
67th, check-valves；7th, bentonite pumping installations；71st, it is radially injected hole；72nd, flow-guiding channel；73rd, flow guide bar；8th, middle shield；9th, tail shield；
10th, valve body.
Embodiment
Under will combine Figure of description and specific embodiment the present invention will be described in further details, but therefore do not limit
Protection scope of the present invention processed.
As shown in figure 1, the abrasion reducing system of the rectangular pipe jacking machine of the present embodiment, including foam-generating device, foam, which is produced, to be filled
Put including the first controller, gas supply assembly 1, foam mixing liquid conveying assembly 2 and gas-liquid mixed component 3, wherein, gas supply assembly 1
Including for detecting the first flowmeter 11 of supply gas flow and the flow valve 12 of gas flow being supplied for adjusting, foam is mixed
The first delivery pump 21 that liquid conveying assembly 2 includes being used to convey foam mixing liquid is closed, gas-liquid mixed component 3 is used to that gas will to be supplied
Mixed with foam mixing liquid.In the present embodiment, the first controller sends control respectively according to the detection signal of first flowmeter 11
Instruct and give the delivery pump 21 of flow valve 12 and first, the conveying capacity of control supply gas outflow amount and foam mixing liquid.The present invention
Detected using 11 pairs of supply gas flows of first flowmeter, foams mix is realized by the detection to gas flow and feedback
The accurate control of liquid injection rate, the i.e. injection rate of foam mixing liquid use opened loop control with supply gas flow proportion, and by one
The flowmeter of group detection air mass flow realizes that it effectively prevent the feelings for setting flow to control feedback using closed-loop control Xu Ge roads
Condition, effectively reduces system complexity, controls simple and reliable；Meanwhile, set one group of flowmeter to effectively reduce flowmeter and exist
Replacement cost under corrosive environment, service life of equipment is high.
In the present embodiment, first flowmeter 11 is to ensure that system realizes opened loop control for the timely feedback of air requirements amount
The detection signal of first flowmeter 11 is passed to flow valve 12 and adjusts its switching value by the basis followed, the first controller, simultaneously
Control the variable-frequency motor rotating speed of the first delivery pump 21 to adjust the pumping of foam mixing liquid, finally realize foam mixing liquid and compression
The accurate proportioning of air.In the present embodiment, the dosage of foam mixing liquid according to needed for being matched expansion rate, compressed air is mixed with foam
The proportioning for closing liquid is 1:8~25.
In the present embodiment, gas supply assembly 1 also includes steam line 13, filtering pressure reducing valve 14 and for detecting supply gas pressure
The pressure gauge 15 of power.Wherein, the two ends of steam line 13 are connected with supply source of the gas and gas-liquid mixed component 3 respectively；Filtering decompression
Valve 14 is used to pre-process supply gas, can remove air plankton, and provide stable pressure value.In the present embodiment, pressure
Power table 15, flow valve 12, filtering pressure reducing valve 14 and first flowmeter 11 are on steam line 13, and flow valve 12, pressure
Table 15 and first flowmeter 11 are respectively positioned on the downstream of filtering pressure reducing valve 14, to carry out pressure regulation and inspection to stable supply gas
Survey.
In the present embodiment, foam mixing liquid conveying assembly 2 also includes mixed liquor conveyance conduit 22 and flow indicator 23.Its
In, the two ends of mixed liquor conveyance conduit 22 produce component 6 with foam mixing liquid respectively and gas-liquid mixed component 3 is connected；Flow refers to
Show device 23 on mixed liquor conveyance conduit 22, and positioned at the downstream of the first delivery pump 21, for the injection to foam mixing liquid
Amount is monitored in real time.
In the present embodiment, stop valve 4 and check valve 5 are equipped with steam line 13 and mixed liquor conveyance conduit 22.Cut-off
Valve 4 is two, and two stop valves 4 are divided into the liquid feeding end and outlet end of pipeline, for the overall break-make of control pipeline, convenient pipe
Repair in road；Check valve 5 is located at the downstream of the stop valve 4 of outlet end, for preventing gas-liquid from flowing backwards.In the present embodiment, stop valve 4 is
Ball valve, check valve 5 is Vertical Lift Check Valves.
In the present embodiment, foam mixing liquid and compressed air are after sufficiently mixing by the bubble of generation in gas-liquid mixed component 3
Foam injects push-bench, which ensure that the smooth discharge of dregs, it is ensured that the stabilization in digging face, the soil after being adjusted through foam has
Good mobility, plasticity and moisture penetration, it expands the soil scope of push-bench excavation, while greatly reducing knife
Disk moment of torsion, reduces the abrasion of cutter.In the present embodiment, the output end of gas-liquid mixed component 3 is provided with regulation foam output quantity
Pressure-regulating valve and the ball check valve of control foam output.
As shown in Fig. 2 in the present embodiment, foam-generating device also includes foam mixing liquid and produces component 6, foam mixing liquid
Producing component 6 includes second controller, water supplying unit 61, foam dope supply unit 62 and for foam dope to be mixed with water
Mixed liquor generation unit 63.Wherein, water supplying unit 61 includes the second flowmeter 611 for being used to detect water-carrying capacity, foam dope
Supply unit 62 includes the second delivery pump 621 of conveying foam dope, and second controller is believed according to the detection of second flowmeter 611
Control instruction number is sent to the second delivery pump 621, the conveying capacity of foam dope is controlled.Specifically, in the mixed of foam dope and water
Close after ratio-dependent, system enters working condition, now the water supply start of water supplying unit 61, and is detected by second flowmeter 611
Signal is simultaneously passed to the second delivery pump 621 by water-carrying capacity, foam dope amount of the controller according to needed for being determined proportioning, the second conveying
The motor of pump 621 adjusts frequency conversion drive the rotating speed of the second delivery pump 621, and the result to detection is compensated, and then realizes
The accurate control of mixed solution proportioning, its is easy to control, and proportioning reliability is high.In the present embodiment, the proportioning of foam dope and water
For 0.8%~5%.
In the present embodiment, water supplying unit 61 also includes water supply line 612, and it is defeated that foam dope supply unit 62 also includes stoste
Pipeline 622 is sent, water supply line 612 is connected with stoste conveyance conduit 622 by connecting pipe 64 with mixed liquor generation unit 63, even
64 are threaded a pipe provided with filter 65, filter 65 is used to pre-process foam mixing liquid, with the mixed liquor that defoams
Large granular impurity.
In the present embodiment, ball valve 66 and check-valves 67, ball valve are equipped with water supply line 612 and stoste conveyance conduit 622
66 are located at the liquid feeding end of pipeline, for the break-make of control pipeline, facilitate pipeline maintenance；Check-valves 67 is located at the downstream of ball valve 66,
For preventing liquid from flowing backwards.In the present embodiment, second flowmeter 611 is located between the ball valve 66 and check-valves 67, and described the
Two delivery pumps 621 are located between ball valve 66 and check-valves 67.
In the present embodiment, the upstream of the ball valve 66 of water supply line 612 is provided with pneumatic ball valve 613, mixed liquor generation unit 63
Including foams mix liquid storage tank 631 and three groups of limit switches, foams mix liquid storage tank 631 is mixed for keeping in foam dope with water
The foam mixing liquid of formation, three groups of limit switches include the be sequentially arranged from top to bottom along the side wall of foams mix liquid storage tank 631
One liquid-level switch 632, the second liquid-level switch 633 and the 3rd liquid-level switch 634, wherein, the first liquid-level switch 632, the second liquid level
Switch 633 is all connected with that threeth controller of the control instruction to pneumatic ball valve 613 can be sent, and it effectively prevent foam mixing liquid
Overflow, it is ensured that foams mix liquid storage tank 631 stores normal liquid level amount, the 3rd liquid-level switch 634 is used to prevent the first conveying
The free-runing operation of pump 21.In the present embodiment, foam dope supply unit 62 is included on foam dope tank 623, foam dope tank 623
Provided with the 4th limit switch 624, the 4th limit switch 624 is used for the liquid level for detecting foam dope.
As shown in Figures 3 to 5, in the present embodiment, the abrasion reducing system of rectangular pipe jacking machine also includes bentonite pumping installations 7,
Bentonite pumping installations 7 is located at the first half of shield 8 in push-bench, i.e., actively inject bentonite in the first half of middle shield 8, it is to avoid
The first half of shield body is without the big phenomenon of fluid abrasion, and in the present embodiment, bentonite slurry is pumped into pipe by bentonite pumping installations 7
Between piece and soil layer, lubrication and protective effect are played to shield body shell and soil layer, which further reduces tube coupling in progradation
In abrasion, effectively protect tube coupling, improve equipment operation security and reliability, meanwhile, utilize bentonitic expansion
Property can effectively fill section of jurisdiction gap, play a part of preventing stratum from loosening, the support solidification soil body.
In the present embodiment, bentonite pumping installations 7 includes flow-guiding channel 72, multiple is radially injected hole 71 and multiple flow guide bars
73.Wherein, multiple to be radially injected hole 71 along the middle first half of shield 8 circumferentially, bentonite is pumped out by being radially injected hole 71, real
Existing pumping between section of jurisdiction and soil layer；Flow-guiding channel 72 is located at and is radially injected at hole 71, and is set along the direction of middle shield 8 to tail shield 9
Put, it is ensured that bentonite slurry spreads along flow-guiding channel 72 to tail shield 9, serve the effect of effectively protection shield body；Multiple water conservancy diversion
Along the middle first half of shield 8 circumferentially, flow guide bar 73 is in flow-guiding channel 72, and the pick of flow guide bar 73 and rectangular pipe jacking machine for bar 73
Enter that direction is parallel, it solidifies expansion of the preacceleration bentonite slurry between soil layer and shield body gap using surface tension of liquid in mud
Dissipate so that bentonite slurry is uniformly distributed between shield body shell and soil layer, beneficial to subsequent construction.In other embodiments, swelling
Bentonite can also be injected cutterhead anterior by native pumping installations 7 according to stratum geological condition.
In the present embodiment, valve body 10 of the hole 71 provided with control bentonite injection is radially injected, bentonitic injection speed is matched somebody with somebody
Fltting speed is closed, pressure is injected by pressure sensor monitoring, and bentonitic injection and injection rate are controlled by valve body 10, at it
His embodiment, can also adopt and manually control.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as in the absence of structure punching
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of abrasion reducing system of rectangular pipe jacking machine, it is characterised in that including foam-generating device, the foam-generating device bag
Include the first controller, gas supply assembly, foam mixing liquid conveying assembly and the gas for supply gas to be mixed with foam mixing liquid
Liquid electric hybrid module, the gas supply assembly includes being used for the first flowmeter of detection supply gas flow and for adjusting supply gas
The flow valve of flow, the foam mixing liquid conveying assembly includes being used for conveying the first delivery pump of foam mixing liquid, and described the
One controller sends control instruction to flow valve and the first delivery pump, control supply respectively according to the detection signal of first flowmeter
The conveying capacity of gas outflow amount and foam mixing liquid.
2. the abrasion reducing system of rectangular pipe jacking machine according to claim 1, it is characterised in that the gas supply assembly also includes supplying
Feed channel, filtering pressure reducing valve and the pressure gauge for detecting supply gas pressure, the pressure gauge, flow valve and first flowmeter
On the steam line, and positioned at the downstream of the filtering pressure reducing valve.
3. the abrasion reducing system of rectangular pipe jacking machine according to claim 2, it is characterised in that the foam mixing liquid conveying group
Part also includes mixed liquor conveyance conduit and flow indicator, and the flow indicator is located on the mixed liquor conveyance conduit, and
Positioned at the downstream of first delivery pump.
4. the abrasion reducing system of rectangular pipe jacking machine according to claim 3, it is characterised in that the steam line and mixed liquor
Be equipped with conveyance conduit for control pipeline break-make stop valve and prevent gas-liquid flow backwards check valve.
5. the abrasion reducing system of the rectangular pipe jacking machine according to Claims 1-4 any one, it is characterised in that the foam
Generation device also includes foam mixing liquid and produces component, and it is single including second controller, water supply that the foam mixing liquid produces component
Member, foam dope supply unit and the mixed liquor generation unit for foam dope to be mixed with water, the water supplying unit include
Second flowmeter for detecting water-carrying capacity, the foam dope supply unit includes the second delivery pump of conveying foam dope,
The second controller sends control instruction to the second delivery pump according to the detection signal of second flowmeter, control foam dope
Conveying capacity.
6. the abrasion reducing system of rectangular pipe jacking machine according to claim 5, it is characterised in that the water supplying unit also includes supplying
Waterpipe, the foam dope supply unit also includes stoste conveyance conduit, and the water supply line passes through with stoste conveyance conduit
Connecting pipe is connected with mixed liquor generation unit, and the connecting pipe is provided with the filtering for being used for being filtered to foam mixing liquid
Device.
7. the abrasion reducing system of rectangular pipe jacking machine according to claim 6, it is characterised in that the water supply line and stoste are defeated
The check-valves for sending the ball valve that control pipeline break-make is equipped with pipeline and preventing liquid from flowing backwards, the check-valves is located under ball valve
Trip.
8. the abrasion reducing system of rectangular pipe jacking machine according to claim 6, it is characterised in that the mixed liquor generation unit bag
Foams mix liquid storage tank and three groups of limit switches for detecting foam mixing liquid liquid level are included, limit switch described in three groups includes edge
What foams mix liquid storage tank side wall was sequentially arranged from top to bottom prevents the first liquid-level switch, the guarantee foam that foam mixing liquid overflows
Mixing liquid storage tank stores the second liquid-level switch of normal level amount and prevents the 3rd liquid-level switch of the first delivery pump free-runing operation.
9. the abrasion reducing system of the rectangular pipe jacking machine according to Claims 1-4 any one, it is characterised in that also including to
Bentonitic bentonite pumping installations is pumped between push-bench section of jurisdiction and soil layer, the bentonite pumping installations is located at the push pipe
The middle shield of machine, and positioned at the first half of the middle shield.
10. the abrasion reducing system of rectangular pipe jacking machine according to claim 8, it is characterised in that the bentonite pumping installations
Including being radially injected hole, located at the flow-guiding channel being radially injected at hole and located at water conservancy diversion along the middle shield first half circumferentially multiple
Multiple flow guide bars in passage along the middle shield first half circumferentially, flow-guiding channel shield to direction of tail shield in is set, institute
State flow guide bar parallel with the tunneling direction of rectangular pipe jacking machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432881.8A CN107091100B (en) | 2017-06-09 | 2017-06-09 | Antifriction system of rectangle push bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432881.8A CN107091100B (en) | 2017-06-09 | 2017-06-09 | Antifriction system of rectangle push bench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107091100A true CN107091100A (en) | 2017-08-25 |
| CN107091100B CN107091100B (en) | 2023-10-17 |
Family
ID=59639330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710432881.8A Active CN107091100B (en) | 2017-06-09 | 2017-06-09 | Antifriction system of rectangle push bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107091100B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721506A (en) * | 2019-10-19 | 2020-01-24 | 长兴国晨工程机械科技有限公司 | Water supply device for muddy water balance push bench |
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| CN202140088U (en) * | 2011-07-22 | 2012-02-08 | 中铁十一局集团城市轨道工程有限公司 | Shield machine foam agent injecting pipeline system capable of injecting bentonite symultaneously |
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| CN207161086U (en) * | 2017-06-09 | 2018-03-30 | 中国铁建重工集团有限公司 | A kind of abrasion reducing system of rectangular pipe jacking machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06299779A (en) * | 1993-04-15 | 1994-10-25 | Mitsubishi Heavy Ind Ltd | Underwater tunnel excavator |
| CN101463724A (en) * | 2008-12-30 | 2009-06-24 | 上海隧道工程股份有限公司 | Construction method for connection passage by double-row hole horizontal freezing method |
| CN101575976A (en) * | 2009-06-04 | 2009-11-11 | 上海建工（集团）总公司 | Space enclosing structure convenient for opening door opening, construction method and use method thereof |
| CN102278120A (en) * | 2010-06-08 | 2011-12-14 | 上海力行工程技术发展有限公司 | Shield center cutting device for rotating by separately driving |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110721506A (en) * | 2019-10-19 | 2020-01-24 | 长兴国晨工程机械科技有限公司 | Water supply device for muddy water balance push bench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107091100B (en) | 2023-10-17 |
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