CN205895246U - Shield constructs with foam air multistage adjusting device - Google Patents
Shield constructs with foam air multistage adjusting device Download PDFInfo
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- CN205895246U CN205895246U CN201620815255.8U CN201620815255U CN205895246U CN 205895246 U CN205895246 U CN 205895246U CN 201620815255 U CN201620815255 U CN 201620815255U CN 205895246 U CN205895246 U CN 205895246U
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Abstract
The utility model relates to a shield constructs with foam air multistage adjusting device sets up on shield structure machine, including the control unit and the air mass flow accurate adjustment unit of being connected with the the control unit communication respectively, foam solution flow volume coarse adjusting unit, foam generation unit and soil body induction element, air mass flow accurate adjustment unit and foam solution flow measure the coarse adjusting unit and pass through the pipeline respectively and be connected with foam generation unit. Compared with the prior art, the utility model discloses can improve the foam effect, avoid the improper risk factor of soil body improvement that improper foam ratio arouses, extend the shield and construct the machine and at complex geological adaptability, improve the shield by a wide margin and construct the safety in production performance of machine when the tunnelling construction, effective construction and administrative cost who reduces the tunnelling produces the economic benefits that is showing and good social.
Description
Technical field
This utility model belongs to shield machine technical field and in particular to a kind of shield foam air multistage adjusting means.
Background technology
Earth pressure balanced shield, EPBS is the conventional engineering equipment of soft clay area constructing metro tunnel.But shield is passing through stream plasticity relatively
Difference, water content are high, infiltration coefficient larger soil layer when, have that the soil body is liquefied by disturbance, fltting speed is slow, an easy molding of cutterhead etc.
Some technical barriers.Case history proves, not only contributes to keep excavation face earth pressure balance using foam, and mechanical load
And cutter head torque is obviously reduced, because the soil after adjusting through foam has good mobility and plasticity and prevents water penetration
Property, so the use of foam expands the suitable soil scope excavated of balancing earth-pressure shielding machine, greatly reduce cutterhead simultaneously and turn round
Square, decreases the abrasion of cutter.At present, balancing earth-pressure shielding machine is provided with greatly foaming system, and foam also becomes sediment improvement
Requisite additive.
Shield machine, as a kind of technology-intensive Important Project equipment being exclusively used in underground engineering, manufactures skill with shield machine
The development of art, application new material, new technology become trend lifting shield machine manufacturing technology level, and during foam is adjusted,
Need to consider to produce the many factors mixing regulation between the foam dope of foam, water and air, so foaming system have multiple
Governing loop, influences each other, process bad foam proportioning can be led to improper, and then affect the quality of shield driving engineering, safety,
Progress and engineering cost.
Content of the invention
The purpose of this utility model is exactly to overcome the defect of above-mentioned prior art presence to provide one kind can improve bubble
Foam effect, evade improper risk factor of soil improvement caused by improper foam proportioning, expand shield machine and adapt in complicated geological
Ability, is greatly improved the safety in production performance in tunneling construction for the shield machine, effectively reduces construction and the management cost of driving, produces
Raw significant economic benefit and the shield foam air multistage adjusting means of good social benefit.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of shield foam air multistage adjusting means, is arranged on shield machine, including control unit and respectively with control
Air mass flow accurate adjustment unit, foam solution flow coarse adjustment unit, foam generating unit and soil body sensing that unit communications processed connect
Unit, described air mass flow accurate adjustment unit and foam solution flow coarse adjustment unit pass through pipeline with foam generating unit even respectively
Connect.
Described air mass flow accurate adjustment unit includes gas supply assembly, and described gas supply assembly passes through pipe with foam generating unit
Road connect, the pipeline between gas supply assembly and foam generating unit is sequentially provided with mass air flow sensor, air pressure probe and
AIR Proportional regulating valve.
Described air mass flow accurate adjustment unit also includes being arranged on the air two-chip type ball valve of gas supply assembly gas outlet, sets
Put in the air pneumatic ball valve of foam generating unit air inlet and be arranged on pipe between air pneumatic ball valve and foam generating unit
Air back valve on road.
Air two-chip type ball valve and air pneumatic ball valve can easily cut off the supply of air.
The foam dope that described foam solution flow coarse adjustment unit includes for water assembly and is respectively equipped with liquid level sensor
Case and foam solution case, described confession water assembly is connected with foam solution case by pipeline respectively with foam dope case, described
Foam solution case is connected by pipeline with foam generating unit, on the pipeline between foam solution case and foam generating unit successively
It is provided with solution variable frequency adjustment pump, liquid inventory meter and solution pressure table.
Stock solution dosing pump is sequentially provided with the pipeline between described foam dope case and foam solution case, adds stock solution flow
Meter and stock solution pneumatic ball valve, the pipeline between described confession water assembly and foam solution case is sequentially provided with add water effusion meter and add
Water pneumatic ball valve, is additionally provided with solution stirrer in described foam solution case.
Described foam solution flow coarse adjustment unit also includes the solution two-chip type ball being arranged on the outlet of foam solution case
Valve, it is arranged on the solution check-valves of foam maker liquid-inlet and is arranged on solution two-chip type ball valve and solution variable frequency adjustment valve
Between y type filter on pipeline.
Solution two-chip type ball valve can easily cut off the supply of foam solution.
Described foam generating unit is foam maker, and this foam maker includes the container with chamber and is filled in
Particle diameter in this container cavity is the granule of 3～5mm, and the outlet of foam maker is provided with delivery gauge.
The outlet of described foam maker is additionally provided with the low pressure ball valve for maintenance.
Described soil body sensing unit includes cutter head torque sensor, soil pressure value sensor and the pick being arranged on shield machine
Enter rate sensor.
During shield machine work, cutter head torque sensor sensing to cutterhead torsion becomes big, soil pressure value sensor sensing to soil pressure
Value increases, Advance rate sensor sensing is slack-off to driving speed, and signal is fed back to controller, under the control of the controller,
Increase air mass flow and foam liquid flow, so that foam is matched with soil body feature, carry out certainly according to soil body change etc.
Dynamic adjust, the extraneous interference of suppression, the precision of true system fading margin, the ratio meeting air mass flow and foam dope is to reach to institute
The optimal improvement of the tunneling construction soil body.
As supplementary meanss, this system can also be detected by the soil body that operator discharge to shield machine, and root
According to the physicochemical properties of the soil body, by controller, manually to air mass flow with foam solution flow is adjusted so that shield
Machine driving is smoothly.
Solution variable frequency adjustment pump adjusts the quantity delivered that motor rotations realize pump by converter, though carry out is coarse adjustment,
But adjust rapid, whether liquid inventory meter is needed for system and air for monitor in real time solution variable frequency adjustment pump delivery
The flow of flows match.
In system, the performance of air adjustment determines whether the foam that shield machine is formed meets under different geological conditions, special
That tunneling construction under the geological conditions that need to improve requires, directly decide the quality of shield driving engineering, safety, progress and
Engineering cost.Thus the Flow-rate adjustment of air needs precise control, both air flow modulation of the present utility model passes through AIR Proportional
Carrying out the regulation of air mass flow, Flow-rate adjustment is linear for regulating valve, controls accurately, and foam solution flow coarse adjustment unit matching,
And by each sensor by the signal transmission recording to controller, form closed loop system and must adapt to tunnel such that it is able to join in real time
The foam proportioning that the improvement of the job site soil body requires.
Compared with prior art, this utility model has the advantages that
(1) this utility model application new material, new technology are completely newly ground to foam air regulating system in foaming system
Send out, brand new and pass through system optimizing control, be the compressed air hybrid technique that foaming system provides a linear regulation,
Form a closed loop system with the relevant parameter of the coarse adjustment link of system, easily reach proportioning and go out to adapt to the tunneling construction scene soil body
The foam proportioning that improvement requires.
(2) can provide, according to soil improvement scheme, the foam proportioning agreed with, improve the efficiency of soil improvement, effectively
Reduce soil improvement construction cost, be prevented effectively from safety and production hidden danger or the accident that improper soil improvement causes, improve shield
The level of security of structure machine tunneling construction, effectively save engineering time and relevant cost.
(3) foam solution flow coarse adjustment unit accurately can carry out proportioning to water and foam dope.
(4) pass through control assembly, optimize algorithm design processed and programming, control air that can be better and foam are molten
Flow quantity is so that shield machine driving is more steadily efficient.
(5) pass through foam maker pipe interior diameter 3～5mm about particulate interspaces, generate 30 μm～400 μm fine emulsus
Foam, is injected into digging face and soil cabin, realizes excavating the soil improvement on stratum, foam effect is good.
As Supporting Media soil add foam after, its plastotype, mobility, barrier properties and elasticity are improved,
The improvement soil body, prevents clay from forming mud cake, simultaneously works as reducing frictional force, and shield machine driving driving power may be reduced by, also
The effect playing lubrication also can reduce the abrasion of cutter.Cross for foaming system multiple factors, interactional work
State, the control thinking that application coarse adjustment is combined with accurate adjustment, coarse adjustment, i.e. with the soil body situation on stratum, sets foam dope and water
Precise proportions, and coarse adjustment forms the foam solution flow meeting live soil improvement, accurate adjustment is passed through regulation and is mixed with foam solution
Compressed air combined amount, reach foam and can realize to greatest extent for interval soil improvement of instantly constructing.
Brief description
Fig. 1 is the shield foam air multistage adjusting means connection diagram of this utility model embodiment 1.
In figure, 1 is delivery gauge, and 2 is foam maker, and 3 is air back valve, and 4 is air pneumatic ball valve, and 5 is sky
Gas ratio adjusting valve, 6 is air pressure probe, and 7 is mass air flow sensor, and 9 is air two-chip type ball valve, and 10 is the flow that adds water
Meter, 11 are plus stock solution flow meter, and 12 is low pressure ball valve, and 13 is solution check-valves, and 15 is the startup ball valve that adds water, and 16 is that stock solution is pneumatic
Ball valve, 17 is solution stirrer, and 18 is foam solution liquid level sensor, and 19 is stock solution liquid level sensor, and 20 is solution pressure table,
21 is liquid inventory meter, and 22 is solution variable frequency adjustment valve, and 23 is y type filter, and 24 is solution two-chip type ball valve, and 25 is that foam is molten
Liquid case, 26 is stock solution dosing pump, and 27 is foam dope case.
Specific embodiment
With specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
A kind of shield foam air multistage adjusting means, as shown in figure 1, be arranged on shield machine, including control unit
And communicate the air mass flow accurate adjustment unit being connected, foam solution flow coarse adjustment unit, foam generating unit with control unit respectively
With soil body sensing unit, described air mass flow accurate adjustment unit and foam solution flow coarse adjustment unit pass through pipeline and foam respectively
Generating unit connects.
Wherein, air mass flow accurate adjustment unit includes gas supply assembly, and described gas supply assembly passes through pipe with foam generating unit
Road connects, and the pipeline between gas supply assembly and foam generating unit is sequentially provided with mass air flow sensor 7, air pressure probe 6
With AIR Proportional regulating valve 5, air mass flow accurate adjustment unit also includes the air two-chip type ball being arranged on gas supply assembly gas outlet
Valve 9, be arranged on foam generating unit air inlet air pneumatic ball valve 4 and be arranged on air pneumatic ball valve 4 and foam occur single
Air back valve 3 on pipeline between unit.
Foam solution flow coarse adjustment unit includes for water assembly and is respectively equipped with foam dope liquid level sensor 19 and foam
The foam dope case 27 of solution level sensor 18 and foam solution case 25, described confession water assembly and foam dope case 27 are respectively
It is connected with foam solution case 25 by pipeline, described foam solution case 25 is connected by pipeline with foam generating unit, foam
Solution variable frequency adjustment valve 22, liquid inventory meter 21 and solution are sequentially provided with the pipeline between liquor box 25 and foam generating unit
Pressure gauge 20, the pipeline between foam dope case 27 and foam solution case 25 is sequentially provided with stock solution dosing pump 26, adds stock solution stream
Gauge 11 and stock solution pneumatic ball valve 16, the pipeline between described confession water assembly and foam solution case 25 is sequentially provided with the stream that adds water
Gauge 10 and the pneumatic ball valve 15 that adds water, are additionally provided with solution stirrer 17, foam solution flow is thick in described foam solution case 25
Unit is adjusted also to include being arranged on the solution two-chip type ball valve 24 of the outlet of foam solution case 25, be arranged on foam maker 2 liquid
Solution check-valves 13 of import and be arranged on the y type mistake on pipeline between solution two-chip type ball valve 24 and solution variable frequency adjustment valve 22
Filter 23.
Foam generating unit is foam maker 2, and this foam maker 2 includes the container with chamber and is filled in this appearance
Particle diameter in device cavity is the granule of 3～5mm, and the outlet of foam maker 2 is provided with delivery gauge 1.Described foam occurs
The outlet of device 2 is additionally provided with the low pressure ball valve 12 for maintenance.
The air pressure probe 6 of the present embodiment, solution pressure table 20 and delivery gauge 1 are all passed using diaphragm type pressure
Sensor.
Soil body sensing unit includes cutter head torque sensor, soil pressure value sensor and the Advance rate being arranged on shield machine
Sensor.As supplementary meanss, this system can also be detected by the soil body that operator discharge to shield machine, and according to
The physicochemical properties of the soil body, by controller, manually to air mass flow with foam solution flow is adjusted so that shield machine
Driving smoothly (for example detects to the water content and hardness of the soil body that shield machine is derived, when water content is big, hardness is big
Wait, by the flow of controller increase air and foam solution).
This utility model use when,
(1) solution ratio: be preferably injected water and foam solution case 25 total measurement (volume) 5% of foam solution case 25 total measurement (volume) 95%
Foam dope carry out uniform stirring and form a kind of foam solution.Injection water and stock solution during can by respective effusion meter Lai
Monitoring, accurately injects proportional quantity.Air-powered electromagnetic can be fed back to when injection rate reaches foam solution liquid level sensor 18 when setting is put
One voltage signal of valve, closes in time and adds water pneumatic ball valve 15 and stock solution pneumatic ball valve 16 completes proportioning injection.
(2) blowing air and solution:
The solution variable frequency adjustment of the present embodiment is to adjust motor rotations to realize the quantity delivered of pump by converter.Solution
Whether effusion meter can monitor in real time solution pump delivery be solution needed for system with air proportional quantity.Adjusted according to monitoring value
Section motor rotations, reach proportional quantity needed for system.
The air compressor normal supply pressure 0.7mpa value critical field of the preferred gas supply assembly of the present embodiment, AIR Proportional
Regulating valve 5 is opened, and it controls air mass flow size is to be set up by the analog signalses that controller exports 4～20ma,
Whether the air mass flow that mass air flow sensor 7 is also passed through in monitored pipeline simultaneously meets ratio requirement.Air pressure probe 6
Simultaneously in feedback pipe air pressure value.
(3) foam occurs:
Air intlet and the liquid-inlet of foam maker (foam gun) is passed through in the mixing of air and foam solution, simultaneously plus
Enter foam agent solution and air, the foam maker port of export arranges outlet pressure sensor, understand foam maker pipeline in real time
And the pressure size of cutterhead outlet.By foam maker pipe interior diameter 3～5mm about gap between stone, generate 30 μm～
400 μm of fine creamy head, are injected into digging face and soil cabin.Realize excavating the soil improvement on stratum.
As Supporting Media soil add foam after, its plastotype, mobility, barrier properties and elasticity are improved,
The improvement soil body, prevents clay from forming mud cake, simultaneously works as reducing frictional force, and shield machine driving driving power may be reduced by, also
The effect playing lubrication also can reduce the abrasion of cutter.Cross for foaming system multiple factors, interactional work
State, the control thinking that application coarse adjustment is combined with accurate adjustment, coarse adjustment, i.e. with the soil body situation on stratum, sets foam dope and water
Precise proportions, and coarse adjustment forms the foam solution flow meeting live soil improvement, accurate adjustment is passed through regulation and is mixed with foam solution
Compressed air combined amount, reach foam and can realize to greatest extent for interval soil improvement of instantly constructing.
Claims (9)
1. a kind of shield foam air multistage adjusting means, be arranged on shield machine it is characterised in that include control unit and
Respectively with control unit communication be connected air mass flow accurate adjustment unit, foam solution flow coarse adjustment unit, foam generating unit and
Soil body sensing unit, described air mass flow accurate adjustment unit and foam solution flow coarse adjustment unit are sent out with foam by pipeline respectively
Raw unit connects.
2. a kind of shield according to claim 1 with foam air multistage adjusting means it is characterised in that described air
Flow accurate adjustment unit includes gas supply assembly, and described gas supply assembly is connected by pipeline with foam generating unit, gas supply assembly with
Mass air flow sensor (7), air pressure probe (6) and AIR Proportional are sequentially provided with the pipeline between foam generating unit adjust
Valve (5).
3. a kind of shield according to claim 2 with foam air multistage adjusting means it is characterised in that described air
Flow accurate adjustment unit also includes being arranged on air two-chip type ball valve (9) of gas supply assembly gas outlet, is arranged on foam generation list
The air pneumatic ball valve (4) of first air inlet and be arranged on the sky on pipeline between air pneumatic ball valve (4) and foam generating unit
Gas check-valves (3).
4. a kind of shield according to claim 1 with foam air multistage adjusting means it is characterised in that described foam
Liquid inventory coarse adjustment unit includes the foam dope case (27) for water assembly and being respectively equipped with liquid level sensor and foam solution case
(25), described confession water assembly is connected with foam solution case (25) by pipeline respectively with foam dope case (27), described bubble
Foam liquor box (25) is connected by pipeline with foam generating unit, the pipeline between foam solution case (25) and foam generating unit
On be sequentially provided with solution variable frequency adjustment valve (22), liquid inventory meter (21) and solution pressure table (20).
5. a kind of shield according to claim 4 with foam air multistage adjusting means it is characterised in that described foam
Stock solution dosing pump (26) is sequentially provided with the pipeline between stock solution case (27) and foam solution case (25), adds stock solution flow meter (11)
With stock solution pneumatic ball valve (16), the pipeline between described confession water assembly and foam solution case (25) is sequentially provided with the flow that adds water
Meter (10) and the pneumatic ball valve that adds water (15), are additionally provided with solution stirrer (17) in described foam solution case (25).
6. a kind of shield according to claim 5 with foam air multistage adjusting means it is characterised in that described foam
Liquid inventory coarse adjustment unit also includes being arranged on solution two-chip type ball valve (24) of the outlet of foam solution case (25), is arranged on bubble
Solution check-valves (13) of foam generator (2) liquid-inlet and be arranged on solution two-chip type ball valve (24) and solution variable frequency adjustment valve
(22) the y type filter (23) on pipeline between.
7. a kind of shield according to claim 1 with foam air multistage adjusting means it is characterised in that described foam
Generating unit is foam maker (2), and this foam maker (2) includes the container with chamber and is filled in this container cavity
Particle diameter be 3～5mm granule, the outlet of foam maker (2) is provided with delivery gauge (1).
8. a kind of shield according to claim 7 with foam air multistage adjusting means it is characterised in that described foam
The outlet of generator (2) is additionally provided with the low pressure ball valve (12) for maintenance.
9. a kind of shield according to claim 1 with foam air multistage adjusting means it is characterised in that the described soil body
Sensing unit includes cutter head torque sensor, soil pressure value sensor and the Advance rate sensor being arranged on shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620815255.8U CN205895246U (en) | 2016-07-29 | 2016-07-29 | Shield constructs with foam air multistage adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620815255.8U CN205895246U (en) | 2016-07-29 | 2016-07-29 | Shield constructs with foam air multistage adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN205895246U true CN205895246U (en) | 2017-01-18 |
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ID=57785783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620815255.8U Active CN205895246U (en) | 2016-07-29 | 2016-07-29 | Shield constructs with foam air multistage adjusting device |
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| CN (1) | CN205895246U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107336361A (en) * | 2017-08-25 | 2017-11-10 | 上海市地江建筑科技有限公司 | The constant pressure and flow foam device of light-weight foamed concrete equipment |
| CN107664034A (en) * | 2016-07-29 | 2018-02-06 | 上海力行工程技术发展有限公司 | A kind of shield foam air multistage adjusting means |
-
2016
- 2016-07-29 CN CN201620815255.8U patent/CN205895246U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664034A (en) * | 2016-07-29 | 2018-02-06 | 上海力行工程技术发展有限公司 | A kind of shield foam air multistage adjusting means |
| CN107336361A (en) * | 2017-08-25 | 2017-11-10 | 上海市地江建筑科技有限公司 | The constant pressure and flow foam device of light-weight foamed concrete equipment |
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