CN202520318U - Foam injection system of shield machine - Google Patents
Foam injection system of shield machine Download PDFInfo
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- CN202520318U CN202520318U CN2012201569779U CN201220156977U CN202520318U CN 202520318 U CN202520318 U CN 202520318U CN 2012201569779 U CN2012201569779 U CN 2012201569779U CN 201220156977 U CN201220156977 U CN 201220156977U CN 202520318 U CN202520318 U CN 202520318U
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Abstract
The utility model discloses a foam injection system of a shield machine. The foam injection system comprises a liquid supply system, an air supply system and a metering adjusting and foam generating system, wherein the liquid supply system comprises a foam agent tank, a foam agent metering pump, a foam agent metering pump safety valve, a static mixer, a water supply pump and a cleaning pump; the air supply system comprises a stop valve D, a pressure gauge B and an air feeding pipeline; and the metering adjusting and foam generating system comprises a liquid supply pump, a liquid metering adjusting valve, a liquid flowmeter B, an air flowmeter, an air quantity adjusting valve and a foam generator. Because the static mixer has a baffling body structure, high-quality foams can be formed by the foam generator, and a foam agent mixing effect is increased by 10%. Because ceramic tube packing is arranged in the foam generator, contact area of foam liquid and air is increased, and the foam liquid entering the foam generator is sufficiently mixed with the air so as to be beneficial for forming foams.
Description
Technical field
The utility model relates to a kind of accessory system of shield machine, particularly a kind of shield machine foam injection system.
Background technology
In recent years, China's City Underground Transportation construction development rapidly.As a kind of underground efficiently bored tunnel special engineering machinery, shield machine has become instrument indispensable in city underground, the tunnel construction.In the shield machine construction process, most of stratum all need be carried out the effective soil body and improved carrying out smoothly of guaranteeing to construct, and are very effective soil body modification methods to soil body filling foam wherein.Usually, the foam injection system of shield machine carries to the main line pump with the centrifugal pump of a big flow to produce the required water of foam.Water fully mixes the back with foaming agent and produces foam; Be injected into different decanting points then; Soil after foam is regulated has good flowability and plasticity and anti-water permeability; Greatly enlarge the soil scope of the suitable excavation of shield machine, greatly reduced the cutterhead moment of torsion simultaneously, reduced the wearing and tearing of cutter.Therefore, the foam injection system becomes one of main accessory system of shield machine at present.But there is following shortcoming in prior art:
1, foaming agent to disperse effect bad.
2, foam injection pressure is low, and it is not enough to treat in digging body, the native storehouse lubricant effect such as dregs.
3, foam line is prone to stop up, and influences the normal operation of foam injection system.
The utility model content
The shortcoming and defect part that exists in the above-mentioned technology, the purpose of the utility model are to design a kind of shield machine foam injection system that foaming agent is dispersed effect, increased foam injection pressure, avoids foam line to stop up that improves.
To achieve these goals, the technical scheme of the utility model is following:
A kind of shield machine foam injection system comprises liquid-supplying system, air supply system, metering adjusting and foam generating system;
Described liquid-supplying system comprises foaming agent jar, foaming agent measuring pump, foaming agent measuring pump safety valve, static mixer, supply-water pump and scavenging pump; The outlet of described foaming agent jar is connected with the inlet of static mixer through stop valve A, foaming agent measuring pump, one way valve A through pipeline, and an end of described foaming agent measuring pump safety valve connects the foaming agent jar, the other end is connected on the pipeline between foaming agent measuring pump and the one way valve A; Through stop valve B, strainer and come water pipeline to be connected, its outlet is connected with the inlet of static mixer through fluid flowmeter A, one way valve B through pipeline the inlet of described supply-water pump through pipeline; One end of described scavenging pump is connected on the outlet foam pipeline of metering adjusting and foam generating system through one way valve C, and its other end is connected on the pipeline between supply-water pump and the stop valve B through shutoff valve C, pressure meter A through pipeline; The outlet of described static mixer is connected with the inlet of the solution feed pump of metering adjusting and foam generating system;
Described static mixer comprises static mixer housing, deflector body; Described deflector body is made up of deflection plate A, deflection plate B, core bar; Deflection plate A and deflection plate B are welded on the core bar successively; Every adjacent two layers deflection plate is in the opposite direction, deflector body topmost deflection plate and bottom deflection plate be welded in respectively on the static mixer housing;
Described air supply system comprises stop valve D, pressure meter B and comes the tracheae line, describedly comes the tracheae line to regulate with metering with pressure meter B and an end of the gas flowmeter of foam generating system is connected through stop valve D;
Described metering adjusting and foam generating system comprise solution feed pump, liquid meter control valve, fluid flowmeter B, gas flowmeter, agent gas adjustable valve, foam maker; Described feed flow delivery side of pump through the inlet that fluid flowmeter B, pressure meter C, stop valve E, one way valve D are connected to foam maker, is equipped with one way valve E on the outlet foam pipeline of foam maker through pipeline; The arrival end of described solution feed pump is equipped with liquid-pressure pick-up; One end of described gas flowmeter is equipped with gas pressure sensor, and the other end is connected to the inlet of foam maker through agent gas adjustable valve, one way valve F, stop valve F;
Described foam maker is made up of foam maker housing, inner support and earthenware filler; Inner support is welded in the foam maker housing; Be used to support the filler at differing heights place in the foam maker housing, earthenware filler specification is
Described scavenging pump of the utility model and one way valve C form the scavenging pump assembly; Described solution feed pump, fluid flowmeter B, pressure meter C, stop valve E, one way valve D, foam maker and one way valve E form the foam maker assembly, and described gas flowmeter, agent gas adjustable valve, one way valve F and stop valve F form agent gas adjustable valve assembly; Described scavenging pump assembly, foam maker assembly and gas dosage adjustments valve module all have 4 groups; Be connected on the pipeline between supply-water pump and the stop valve B through shutoff valve C, pressure meter through pipeline after the suction line parallel connection of described 4 groups of scavenging pump assemblies, its port of export is connected on the outlet line of corresponding foam maker assembly; Be connected with the outlet line of static mixer after the suction line parallel connection of described many group foam maker assemblies; Be connected with the outlet line of air supply system after the parallel connection of described agent gas adjustable valve assembly suction line, its port of export is connected on the outlet line of corresponding foam maker assembly.
Compared with prior art, the utlity model has following beneficial effect:
1, because the utility model static mixer adopts the deflector body structure, the effect of deflector body is the motion gradient that increases foam solution, not only makes foam solution constantly cut apart, move, converge again; Also can produce eddy current in the section direction; Foam solution is produced very strong shearing force, make foam solution further cut apart mixing, finally form needed emulsion; Lay a good foundation for foam maker forms high-quality foam, make the mixed effect of foaming agent improve 10%.
2, because the foam maker inside of the utility model has the earthenware filler; The earthenware filler has good hydrophilicity; The surface can form liquid film as thin as a wafer, and the inclination complications of the turbulence of liquid film and structure can promote gas to accelerate to flow, and have increased the contact area of foam solution and air; The foam solution and the air that get in the foam maker are fully mixed, help forming foam.
3, because the utility model has respectively increased the discharge pressure of a solution feed pump raising foam on the foam pipeline, so foam injection pressure is high, has reduced the shield machine fault rate, has saved a large amount of operating maintenance costs.
4, increase a scavenger circuit with the foamed pipe line parallel because the utility model has adopted, to foam pipeline delivery industry water, this method not only can be avoided the obstruction of foam pipeline, and workload is little, cost is low, reliability is high by scavenging pump.
Description of drawings
The utility model has 4 width of cloth accompanying drawings.Wherein:
Fig. 1 is a shield machine foam injection system architecture sketch map.
Fig. 2 is the static mixer structure sketch map.
Fig. 3 is the foam maker structural representation.
Fig. 4 is the process flow diagram of shield machine foam injection system.
Among the figure: 1, foaming agent jar, 2, stop valve A, 3, the foaming agent measuring pump, 4, foaming agent measuring pump safety valve, 5, one way valve A, 6, come water pipeline; 7, strainer, 8, stop valve B, 9, supply-water pump, 10, fluid flowmeter A, 11, one way valve B, 12, static mixer; 13, pressure meter A, 14, shutoff valve C, 15, scavenging pump, 16, one way valve C, 17, come the tracheae line, 18, stop valve D; 19, pressure meter B, 20, liquid-pressure pick-up, 21, solution feed pump, 22, fluid flowmeter B, 23, the liquid meter control valve, 24, pressure meter C; 25, stop valve E, 26, one way valve D, 27, foam maker, 28, the foam pipeline, 29, one way valve E, 30, gas pressure sensor; 31, gas flowmeter, 32, the gas dosing control valve, 33, one way valve F, 34, stop valve F, 35, the static mixer housing, 36, deflector body; 37, core bar, 38, deflection plate A, 39, deflection plate B, 40, the foam maker housing, 41, inner support, 42, the earthenware filler.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.Shown in Fig. 1-3, a kind of shield machine foam injection system comprises liquid-supplying system, air supply system, metering adjusting and foam generating system;
Described liquid-supplying system comprises foaming agent jar 1, foaming agent measuring pump 3, foaming agent measuring pump safety valve 4, static mixer 12, supply-water pump 9, scavenging pump 15; The outlet of described foaming agent jar 1 is connected with the inlet of static mixer 12 through stop valve A2, foaming agent measuring pump 3, one way valve A5 through pipeline, and an end of described foaming agent measuring pump safety valve 4 connects foaming agent jar 1, the other end is connected on the pipeline between foaming agent measuring pump 3 and the one way valve A5; Through stop valve B8, strainer 7 and come water pipeline 6 to be connected, its outlet is connected with the inlet of static mixer 12 through fluid flowmeter A10, one way valve B11 through pipeline the inlet of described supply-water pump 9 through pipeline; One end of described scavenging pump 15 is connected on the outlet foam pipeline 28 of metering adjusting and foam maker system through one way valve C16, and its other end is connected on the pipeline between supply-water pump 9 and the stop valve B8 through shutoff valve C 14, pressure meter A13 through pipeline; The outlet of described static mixer 12 is connected with the inlet of the solution feed pump 21 of metering adjusting and foam generating system;
Described static mixer 12 comprises static mixer housing 35, deflector body 36; Described deflector body is made up of deflection plate A38, deflection plate B39, core bar 37, and deflection plate A38 and deflection plate B39 are welded on the core bar 37 successively, and every adjacent two layers deflection plate is in the opposite direction; Deflector body 36 topmost deflection plates and bottom deflection plate be welded in respectively on the static mixer housing 35; The effect of described deflector body 36 is the motion gradients that increase foam solution, not only makes foam solution constantly cut apart, move, converge again, also can produce eddy current in the section direction; Foam solution is produced very strong shearing force; Make foam solution further cut apart mixing, finally form needed emulsion, lay a good foundation for foam maker 27 forms high-quality foam.
Described air supply system comprises stop valve D18, pressure meter B19 and comes tracheae line 17, describedly comes tracheae line 17 to regulate with metering with pressure meter B19 and an end of the gas flowmeter 31 of foam generating system is connected through stop valve D18;
Described metering adjusting and foam generating system comprise solution feed pump 21, liquid meter control valve 23, fluid flowmeter B 22, gas flowmeter 31, gas dosing control valve 32, foam maker 27; The outlet of described solution feed pump 21 through the inlet that fluid flowmeter B 22, pressure meter C 24, stop valve E 25, one way valve D26 are connected to foam maker 27, is equipped with one way valve E 29 on the outlet foam pipeline 28 of foam maker 27 through pipeline; The arrival end of described solution feed pump 21 is equipped with liquid-pressure pick-up 20; One end of described gas flowmeter 31 is equipped with gas pressure sensor 30, and the other end is connected to the inlet of foam maker 27 through gas dosing control valve 32, one way valve F33, stop valve F34;
Described foam maker 27 is made up of foam maker housing 40, inner support 41, earthenware filler 42; Inner support is welded in the foam maker housing 40; Be used to support the earthenware filler 42 at differing heights place in the foam maker housing 40; Earthenware filler 42 specifications have good hydrophilicity for
earthenware filler 42; The surface can form liquid film as thin as a wafer; The inclination complications of the turbulence of liquid film and structure can promote gas to accelerate to flow, and have increased the contact area of foam solution and air, are beneficial to foam and form;
The described scavenging pump 15 of the utility model is formed the scavenging pump assembly with one way valve C16; Described solution feed pump 21, fluid flowmeter B22, pressure meter C24, stop valve E25, one way valve D26, foam maker 27 and one way valve E29 form the foam maker assembly, and described gas flowmeter 31, gas dosing control valve 32, one way valve F33 and stop valve F34 form the gas dosing valve assembly; Described scavenging pump assembly, foam maker assembly and gas dosing valve assembly all have 4 groups; Be connected on the pipeline between supply-water pump 9 and the stop valve B8 through shutoff valve C 14, pressure meter A13 through pipeline after the suction line parallel connection of described 4 groups of scavenging pump assemblies, its port of export is connected on the outlet foam pipeline 28 of corresponding foam maker assembly; Be connected with the outlet line of air supply system after the inlet pipe fitting parallel connection of described 4 groups of foam maker assemblies, its port of export is connected on the outlet foam pipeline 28 of corresponding foam maker assembly.
As shown in Figure 4, the method for work of the utility model may further comprise the steps:
A, foam solution configuration: foaming agent measuring pump 3 pumps foaming agent from foaming agent jar 1; And mix with foam solution concentration instruction that the water that comes water pipeline 6 to come in provides according to automatic control system; Form foam solution, foam solution gets into static mixer 12 and forms well-mixed foam solution; Described foam solution concentration is the ratio between foaming agent volume and the water volume;
B, foam generate: flow to foam maker 27 through static mixer 12 abundant mixed foam solutions by solution feed pump 21; Air supply system delivers air in the foam maker 27 simultaneously, and foam solution and air fully mix the generation foam under the effect of foam maker 27 inner ceramic tube packings 42; Described air supply system will pass through gas flowmeter 31 and gas dosing control valve 32 before air gets into foam maker 27; The flow value that gas dosing control valve 32 is measured according to gas flowmeter 31 carries out flow-control according to the foam expansion rate, and foam solution produces foam with the air mixing of adjusting back;
C, pipeline clean: when foam stopped to inject, the supply-water pump 9 in the liquid-supplying system cut out, and scavenging pump 15 starts, and to the clear water of foam pipeline 28 conveying certain pressures, foam pipeline 28 constantly has fluid to flow out, and can avoid foam pipeline 28 to stop up.
The described foam solution concentration of the utility model is generally 2%-5% for the foam solution volume accounts for the percentage of mixed solution.
The described foam expansion rate of the utility model is 5-20.
Shown in Figure 4 is the specific embodiment of the utility model, and it is a shield machine foam injection system process, and ingredient comprises liquid-supplying system, air supply system and metering adjusting and foam generating system.Its technological process is following: at first stop valve A2 in the liquid-supplying system is opened, start foaming agent measuring pump 3 foaming agent is pumped from foaming agent jar 1, foaming agent measuring pump safety valve 4, one way valve A 5 are used to protect measuring pump 3; In case pump discharge pressure is too high, safety valve 4 can be protected measuring pump 3 through a part of foaming agent of releasing, thereby one way valve A 5 is used to avoid foaming agent reverse flow protection foaming agent measuring pump 3; Simultaneously, supply-water pump 9 starts, and comes the water of water lines 6 to filter after stop valve B8 is pumped by supply-water pump 9 through strainer 7; Fluid flowmeter A10 is used to measure the flow of water, the foam solution concentration adjustment foaming agent flow that flow value that foaming agent measuring pump 3 records according to fluid flowmeter A10 and automatic control system provide, and foaming agent and water get into static mixer 12 together then; Thereby one way valve B11 is used to avoid water reverse flow protection supply-water pump 9, because static mixer 12 inner deflector body 36 act on, foaming agent and water fully mix therein; Form emulsion, this emulsion gets into foam maker 27 through solution feed pump 21, fluid flowmeter B22, liquid meter control valve 23, stop valve E 25, one way valve D26, and liquid-pressure pick-up 20 is used for to automatic control system transmission pressure signal; Pressure meter C24 is used to show each loine pressure value; The air of air pipe 17 also gets in the foam maker 27 through stop valve D18, gas flowmeter 31, gas dosing control valve 32, one way valve F33, stop valve F34 simultaneously, and gas pressure sensor 30 is used for to automatic control system transmission pressure signal, and pressure meter B19 is used to show to come the force value of tracheae line 17; In foam maker 27; Earthenware filler 42 has increased the contact area of air and foam solution, is beneficial to the generation of foam, and the foaming effect of foam is very good; Owing to increased solution feed pump 21; The injection pressure of foam is very big, and it is very good to treat in digging body, the native storehouse lubricant effect such as dregs, when shield machine stops injected foam; Supply-water pump 9 stops; Scavenging pump 15 starts, and comes the water of water lines 6 to inject clear water through scavenging pump 15 to foam pipeline 28, and one way valve E 29 can avoid water oppositely to get into foam maker 27.During debugging, can see that the foaming effect of foam is very good, fully the foam of foaming constantly ejects from injection hole, and in the process on probation, fault rate reduces greatly, and the phenomenon of pipeline blockage obviously reduces, and has improved the efficiency of construction of shield machine.
Claims (2)
1. a shield machine foam injection system is characterized in that: comprise liquid-supplying system, air supply system, metering adjusting and foam generating system;
Described liquid-supplying system comprises foaming agent jar (1), foaming agent measuring pump (3), foaming agent measuring pump safety valve (4), static mixer (12), supply-water pump (9) and scavenging pump (15); The outlet of described foaming agent jar (1) is connected with the inlet of static mixer (12) through stop valve A (2), foaming agent measuring pump (3), one way valve A (5) through pipeline, and an end of described foaming agent measuring pump safety valve (4) connects foaming agent jar (1), the other end is connected on the pipeline between foaming agent measuring pump (3) and the one way valve A (5); Through stop valve B (8), strainer (7) and come water pipeline (6) to be connected, its outlet is connected with the inlet of static mixer (12) through fluid flowmeter A (10), liquid one way valve B (11) through pipeline the inlet of described supply-water pump (9) through pipeline; One end of described scavenging pump (15) is connected on the outlet foam pipeline (28) of metering adjusting and foam generating system through one way valve C (16), and its other end is connected on the pipeline between supply-water pump (9) and the stop valve B (8) through shutoff valve C (14), pressure meter A (13) through pipeline; The outlet of described static mixer (12) is connected with the inlet of the solution feed pump (21) of metering adjusting and foam generating system;
Described static mixer (12) comprises static mixer housing (35), deflector body (36); Described deflector body (36) is made up of deflection plate A (38), deflection plate B (39), core bar (37); Deflection plate A (38) and deflection plate B (39) are welded on the core bar (37) successively; Every adjacent two layers deflection plate is in the opposite direction, deflector body (36) topmost deflection plate and bottom deflection plate be welded in respectively on the static mixer housing (35);
Described air supply system comprises stop valve D (18), pressure meter B (19) and comes tracheae line (17), describedly comes tracheae line (17) to regulate with metering with pressure meter B (19) and an end of the gas flowmeter (31) of foam generating system is connected through stop valve D (18);
Described metering adjusting and foam generating system comprise solution feed pump (21), liquid meter control valve (23), fluid flowmeter B (22), gas flowmeter (31), agent gas adjustable valve, foam maker (27); The outlet of described solution feed pump (21) through the inlet that fluid flowmeter B (22), pressure meter C (24), stop valve E (25), one way valve D (26) are connected to foam maker (27), is equipped with one way valve E (29) on the outlet foam pipeline (28) of foam maker (27) through pipeline; The arrival end of described solution feed pump (21) is equipped with liquid-pressure pick-up (20); One end of described gas flowmeter (31) is equipped with gas pressure sensor (30), and the other end is connected to the inlet of foam maker (27) through agent gas adjustable valve, one way valve F (33), stop valve F (34);
Described foam maker (27) is made up of foam maker housing (40), inner support (41) and earthenware filler (42); Inner support (41) is welded in the foam maker housing (40); Be used to support the filler at the interior differing heights of foam maker housing (40) place, earthenware filler (42) specification is
2. a kind of shield machine foam injection according to claim 1 system; It is characterized in that: described scavenging pump (15) and one way valve C (16) form scavenging pump (15) assembly; Described solution feed pump (21), fluid flowmeter B (22), pressure meter C (24), stop valve E (25), one way valve D (26), foam maker (27) and one way valve E (29) form foam maker (27) assembly, and described gas flowmeter (31), agent gas adjustable valve, one way valve F (33) and stop valve F (34) form agent gas adjustable valve assembly; Described scavenging pump (15) assembly, foam maker (27) assembly and gas dosage adjustments valve module all have 4 groups; Be connected on the pipeline between supply-water pump (9) and the stop valve B (8) through shutoff valve C (14), pressure meter through pipeline after the suction line parallel connection of described 4 groups of scavenging pumps (15) assembly, its port of export is connected on the outlet line of corresponding foam maker (27) assembly; Be connected with the outlet line of static mixer (12) after the suction line parallel connection of described many group foam maker (27) assemblies; Be connected with the outlet line of air supply system after the parallel connection of described agent gas adjustable valve assembly suction line, its port of export is connected on the outlet line of corresponding foam maker (27) assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201569779U CN202520318U (en) | 2012-04-13 | 2012-04-13 | Foam injection system of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201569779U CN202520318U (en) | 2012-04-13 | 2012-04-13 | Foam injection system of shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520318U true CN202520318U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201569779U Withdrawn - After Issue CN202520318U (en) | 2012-04-13 | 2012-04-13 | Foam injection system of shield machine |
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| Country | Link |
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| CN (1) | CN202520318U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606164A (en) * | 2012-04-13 | 2012-07-25 | 大连华氏流体设备有限公司 | Foam injection system for shield machine and operating method of foam injection system |
| CN103199509A (en) * | 2013-03-13 | 2013-07-10 | 福建省电力有限公司 | Electric transmission line failure relay protection method based on double-end positive sequence fundamental components |
| CN114806586A (en) * | 2022-03-31 | 2022-07-29 | 郑州地铁集团有限公司 | Water-alcohol-based foaming agent for shield, and manufacturing system and manufacturing method thereof |
-
2012
- 2012-04-13 CN CN2012201569779U patent/CN202520318U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606164A (en) * | 2012-04-13 | 2012-07-25 | 大连华氏流体设备有限公司 | Foam injection system for shield machine and operating method of foam injection system |
| CN102606164B (en) * | 2012-04-13 | 2014-02-19 | 大连华峰发展公司 | Foam injection system for shield machine and operating method of foam injection system |
| CN103199509A (en) * | 2013-03-13 | 2013-07-10 | 福建省电力有限公司 | Electric transmission line failure relay protection method based on double-end positive sequence fundamental components |
| CN103199509B (en) * | 2013-03-13 | 2016-08-03 | 福建省电力有限公司 | Transmission line malfunction relay protecting method based on both-end positive sequence fundamental component |
| CN114806586A (en) * | 2022-03-31 | 2022-07-29 | 郑州地铁集团有限公司 | Water-alcohol-based foaming agent for shield, and manufacturing system and manufacturing method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140219 |
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| RGAV | Abandon patent right to avoid regrant |