CN110541716B - U-shaped closed screw machine anti-gushing system capable of separating slag from water and anti-gushing method - Google Patents
U-shaped closed screw machine anti-gushing system capable of separating slag from water and anti-gushing method Download PDFInfo
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- CN110541716B CN110541716B CN201910934542.9A CN201910934542A CN110541716B CN 110541716 B CN110541716 B CN 110541716B CN 201910934542 A CN201910934542 A CN 201910934542A CN 110541716 B CN110541716 B CN 110541716B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000005641 tunneling Effects 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 37
- 239000010802 sludge Substances 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
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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
-
- 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a U-shaped closed screw machine anti-gushing system capable of separating slag and water and an anti-gushing method, which solve the problems of poor effect and single slag discharging mode of a screw machine anti-gushing mechanism in the prior art. The invention comprises a U-shaped sealing box body in sealing connection with a first screw conveyor, wherein a second screw conveyor is arranged in the U-shaped sealing box body, and a slag outlet of the second screw conveyor corresponds to a rear matched continuous belt conveyor; the bottom of the U-shaped sealing box body is provided with a slag-water separation mechanism. According to the invention, by additionally arranging the U-shaped closed box body capable of separating slag and water, in the shield tunneling process, when a water-rich and high-water-pressure stratum is encountered, the spiral conveyor works together with the mud pump to effectively separate and convey the slag, soil and water, and the shield construction is stopped because of a gushing phenomenon generated when the spiral conveyor discharges slag.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a gushing prevention system and a gushing prevention method for a U-shaped closed screw machine capable of separating slag and water.
Background
The screw conveyer is an important part of the earth pressure balance shield machine, and is a passage for discharging dregs in the tunneling process of the shield machine on the one hand; on the other hand, when the shield machine is used for tunneling, the sealing soil plug is formed by conveying and compressing the shield machine through the screw rod, water in soil is prevented from flowing out, and soil pressure of the soil sealing cabin is kept stable.
In the shield structure work progress, the geological conditions is complicated changeable, often can meet rich water or high water pressure stratum, makes screw conveyer take place to gush the phenomenon, and a large amount of high-pressure mud sprays out from the unearthed mouth, and the pipeline on the shield body can be polluted to the injection mud, and the mud that drips down converges the shield structure machine lower part, can submerge the lower part section of jurisdiction, causes the section of jurisdiction to assemble the difficulty. In this case, the worker has to stop normal construction to clean up, causing construction stagnation and affecting civilized construction.
The existing surge-preventing mechanism of the screw machine, such as a surge-preventing double-screw conveyor with the patent number of 01520478934.6 and a surge-preventing screw machine with the patent number of 201420834450.6, directly conveys slag soil by adjusting the rotating speed or the size of a gate of the screw machine, has a surge-preventing effect to a certain extent, but has poor effect and cannot realize slag-water separation, so that further improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a U-shaped closed screw machine anti-gushing system and an anti-gushing method capable of separating slag from water, and solves the problems of poor effect and single slag discharging mode of a screw machine anti-gushing mechanism in the prior art.
The technical scheme of the invention is realized as follows: a U-shaped closed screw machine anti-gushing system capable of separating slag and water comprises a U-shaped sealing box body in sealing connection with a first screw conveyor, wherein a second screw conveyor is arranged inside the U-shaped sealing box body, and a slag outlet of the second screw conveyor corresponds to a rear matched continuous belt conveyor; the bottom of the U-shaped sealing box body is provided with a slag-water separation mechanism.
The slag-water separating mechanism comprises a mud-water chamber, the mud-water chamber is communicated with the U-shaped sealing box body through a connecting channel, a grid plate is arranged in the connecting channel, a water outlet pipe is connected with a water outlet pipe, a ball valve and a mud-water pump are arranged on the water outlet pipe, and the mud-water pump is connected with a sewage tank or a soil bin through a circulating pipe.
The slag outlet of the first screw conveyor is provided with a first gate, and the first gate is connected with the U-shaped sealing box body in a sealing mode.
And two ends of the second screw conveyor extend out of the U-shaped sealing box body, one end of the second screw conveyor is connected with the driving mechanism, the other end of the second screw conveyor is provided with a second gate, and the second gate corresponds to the rear matched continuous belt conveyor.
And at least two liquid level sensors which are positioned at different heights are arranged on the U-shaped sealing box body.
A liquid level sensor is arranged at the specified highest liquid level position on the U-shaped sealing box body, and a liquid level sensor is arranged at the specified lowest liquid level position on the U-shaped sealing box body.
A gushing prevention method of a gushing prevention system of a U-shaped closed screw machine capable of separating slag from water comprises the following steps:
s1: the muck generated in the forward tunneling process of the shield completely enters the U-shaped closed box body through the first screw conveyer;
s2: when the liquid level in the U-shaped closed box body is higher than the set maximum liquid level, the liquid level sensor transmits a signal to the background controller, the background controller controls the ball valve and the mud water pump to be started, and a part of mud residues enter the mud water chamber after being filtered by the grid plate and are conveyed to the sewage tank or conveyed to the soil bin again by the mud water pump; the other part of the large-particle muck is conveyed to an external rear matched continuous belt conveyor through a second spiral conveyor and is conveyed outwards by the rear matched continuous belt conveyor;
s3: when the liquid level in the U-shaped closed box body is lower than the set minimum liquid level, the liquid level sensor transmits a signal to the background controller, the background controller controls the ball valve and the mud pump to be closed, and the residue soil is directly conveyed to an external rear matched continuous belt conveyor by the second spiral conveyor and is conveyed outwards by the rear matched continuous belt conveyor.
In the step S2, when the residue soil in the soil bin is good, the sludge in the sludge water chamber is conveyed to a sewage water tank by a sludge water pump; when the residue soil in the soil bin needs to be improved, the sludge in the sludge water chamber is conveyed to the soil bin by the sludge water pump.
According to the invention, by additionally arranging the U-shaped closed box body capable of separating slag and water, in the shield tunneling process, when a water-rich and high-water-pressure stratum is encountered, the spiral conveyor works together with the mud pump to effectively separate and convey the slag, soil and water, so that the phenomenon of gushing caused by slag discharge of the spiral conveyor is avoided, shield construction halt is caused, shield safe and efficient tunneling is realized, and the high popularization value is realized.
Drawings
In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic overall front view of the present invention.
FIG. 2 is a schematic overall side view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 and 2, in embodiment 1, a U-shaped closed screw machine anti-gushing system capable of separating slag and water comprises a U-shaped sealed box body 3 hermetically connected with a first screw conveyor 1, a second screw conveyor 9 is arranged inside the U-shaped sealed box body 3, and a slag outlet of the second screw conveyor 9 corresponds to a rear matched continuous belt conveyor 11; the muck generated in the shield tunneling process completely enters the U-shaped closed box body through the first spiral conveyor, so that the muck is prevented from falling below the segment erector and is conveyed to an external rear matched continuous belt conveyor through the second spiral conveyor in the U-shaped closed box body; the bottom of the U-shaped sealing box body 3 is provided with a slag-water separation mechanism to realize the separation of mud and water and slag soil.
Further, the slag-water separating mechanism comprises a mud-water chamber 6, the mud-water chamber 6 is communicated with the U-shaped sealing box body 3 through a connecting channel 12, a grid plate 5 is arranged in the connecting channel 12, the grid plate strictly controls the passing particle size of slag soil, and the phenomenon of pipe blockage during discharge of mud water is prevented. The water outlet of the muddy water chamber 6 is connected with a water outlet pipe 13, the water outlet pipe 13 is provided with a ball valve 7 and a muddy water pump 8, the ball valve 7 and the muddy water pump 8 are both connected with a background controller, and the controller is switched on and off. The mud pump 8 is connected with the sewage tank or the soil bin through a circulating pipe 14, and when the residue soil in the soil bin is good, the sludge in the mud water chamber 6 is conveyed to the sewage tank through the mud pump 8; when the residue soil in the soil bin needs to be improved, the sludge in the sludge-water chamber 6 is conveyed to the soil bin by the sludge-water pump 8 for improving the residue soil.
Embodiment 2, a but gushing system is prevented to airtight spiral shell machine of U type of sediment water separation, the slag notch of first screw conveyer 1 is equipped with first gate 2, and first gate and the sealed box 3 sealing connection of U type, first gate are controlled by the hydro-cylinder, realize closing and opening of gate, if the airtight structure of U goes wrong, can close first gate, overhaul U type airtight structure. Two ends of the second spiral conveyor 9 extend out of the U-shaped sealing box body 3, one end of the second spiral conveyor 9 is connected with the driving mechanism, the other end of the second spiral conveyor is provided with a second gate 10, the second gate 10 is controlled by an oil cylinder, and when the working condition needs, the second gate is closed, so that the pressure maintaining function of the U-shaped sealing structure is realized; the second gate 10 corresponds to the rear matched continuous belt conveyor 11, and the residue soil from the second gate falls on the rear matched continuous belt conveyor for conveying the residue soil.
Further, the U-shaped sealing box body 3 is provided with at least two liquid level sensors 4 which are positioned at different heights. The U type seal box 3 is gone up to stipulate the highest liquid level department and is provided with level sensor 4 for the highest liquid level in the U type seal box 3 of monitoring, and the U type seal box 3 is gone up to stipulate the lowest liquid level department and is provided with level sensor 4 for the minimum liquid level in the U type seal box 3 of monitoring.
A gushing prevention method of a gushing prevention system of a U-shaped closed screw machine capable of separating slag from water comprises the following steps:
s1: the muck generated in the forward tunneling process of the shield enters the U-shaped closed box body 3 completely by the first screw conveyor 1; the muck is prevented from falling below the segment erector and is conveyed to an external rear matched continuous belt conveyor by a second spiral conveyor in the U-shaped closed box body;
s2: when the liquid level in the U-shaped closed box body 3 is higher than the set maximum liquid level, the liquid level sensor 4 transmits a signal to the background controller, the background controller controls the ball valve 7 and the mud-water pump 8 to be opened, a part of mud is filtered by the grid plate 5 and then enters the mud water chamber 6, and is conveyed to the sewage tank by the mud-water pump 8 or is conveyed to the soil bin again (namely, when the muck in the soil bin is good, the mud in the mud water chamber 6 is conveyed to the sewage tank by the mud-water pump 8, and when the muck in the soil bin needs to be improved, the mud in the mud water chamber 6 is conveyed to the soil bin by the mud-water pump 8); the other part of the large-particle muck is conveyed to an external rear matched continuous belt conveyor 11 through a second screw conveyor 9 and is conveyed outwards through the rear matched continuous belt conveyor 11; when the shield tunneling meets a water-rich and high-water-pressure stratum, the separation and conveying of the muck and the muddy water are realized, the phenomenon of gushing of the screw conveyor is prevented, and the shield construction is ensured to be uninterrupted.
S3: when the liquid level in the U-shaped closed box body 3 is lower than the set minimum liquid level, the liquid level sensor 4 transmits a signal to the background controller, the background controller controls the ball valve 7 and the muddy water pump 8 to be closed, and the residue soil is directly conveyed to the external rear matched continuous belt conveyor 11 by the second spiral conveyor 9 and is conveyed outwards by the rear matched continuous belt conveyor 11.
The other structure is the same as embodiment 1.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a but gushing system is prevented to airtight spiral shell machine of U type of sediment water separation which characterized in that: the device comprises a U-shaped sealing box body (3) which is in sealing connection with a first spiral conveyor (1), wherein a second spiral conveyor (9) is arranged inside the U-shaped sealing box body (3), and a slag outlet of the second spiral conveyor (9) corresponds to a rear matched continuous belt conveyor (11); the bottom of the U-shaped sealing box body (3) is provided with a slag-water separation mechanism;
the slag-water separating mechanism comprises a mud-water chamber (6), the mud-water chamber (6) is communicated with a U-shaped sealing box body (3) through a connecting channel (12), a grid plate (5) is arranged in the connecting channel (12), a water outlet of the mud-water chamber (6) is connected with a water outlet pipe (13), a ball valve (7) and a mud-water pump (8) are arranged on the water outlet pipe (13), and the mud-water pump (8) is connected with a sewage tank or a soil bin through a circulating pipe (14).
2. The U-shaped closed screw machine anti-gushing system capable of separating slag and water according to claim 1, characterized in that: the slag outlet of the first screw conveyor (1) is provided with a first gate (2), and the first gate is connected with the U-shaped sealing box body (3) in a sealing manner.
3. The U-shaped closed screw machine anti-gushing system capable of separating slag and water according to claim 2, characterized in that: the two ends of the second spiral conveyor (9) extend out of the U-shaped sealing box body (3), one end of the second spiral conveyor (9) is connected with the driving mechanism, the other end of the second spiral conveyor is provided with a second gate (10), and the second gate (10) corresponds to the rear matched continuous belt conveyor (11).
4. The U-shaped closed screw machine anti-gushing system capable of separating slag and water according to claim 1, 2 or 3, characterized in that: and at least two liquid level sensors (4) which are positioned at different heights are arranged on the U-shaped sealing box body (3).
5. The U-shaped closed screw machine anti-gushing system capable of separating slag and water according to claim 4, characterized in that: a liquid level sensor (4) is arranged at the position of the specified highest liquid level on the U-shaped sealing box body (3), and a liquid level sensor (4) is arranged at the position of the specified lowest liquid level on the U-shaped sealing box body (3).
6. A blowout prevention method of a U-shaped closed screw machine blowout prevention system capable of separating slag and water according to claim 1 or 5, characterized by comprising the following steps: the method comprises the following steps:
s1: the muck generated in the forward tunneling process of the shield completely enters the U-shaped closed box body (3) through the first screw conveyor (1); a liquid level sensor (4) is arranged at the position of the specified highest liquid level on the U-shaped sealing box body (3), and a liquid level sensor (4) is arranged at the position of the specified lowest liquid level on the U-shaped sealing box body (3);
s2: when the liquid level in the U-shaped closed box body (3) is higher than the set maximum liquid level, the liquid level sensor (4) transmits a signal to the background controller, the background controller controls the ball valve (7) and the mud water pump (8) to be started, and a part of mud residues enter the mud water chamber (6) after being filtered by the grid plate (5) and are conveyed to the sewage tank or the soil bin again by the mud water pump (8); the other part of the large-particle dregs are conveyed to an external rear matched continuous belt conveyor (11) through a second screw conveyor (9) and are conveyed outwards through the rear matched continuous belt conveyor (11);
s3: when the liquid level in the U-shaped closed box body (3) is lower than the set minimum liquid level, the liquid level sensor (4) transmits a signal to the background controller, the background controller controls the ball valve (7) and the muddy water pump (8) to be closed, and the residue soil is directly conveyed to the external rear matched continuous belt conveyor (11) by the second screw conveyor (9) and is conveyed outwards by the rear matched continuous belt conveyor (11).
7. The anti-surging method of the anti-surging system of the U-shaped closed screw machine capable of separating the slag and the water, according to claim 6, is characterized in that: in the step S2, when the dregs in the soil bin are good, the dregs in the muddy water chamber (6) are conveyed to a sewage tank by a muddy water pump (8); when the residue soil in the soil bin needs to be improved, the sludge in the sludge water chamber (6) is conveyed to the soil bin by the sludge water pump (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934542.9A CN110541716B (en) | 2019-09-29 | 2019-09-29 | U-shaped closed screw machine anti-gushing system capable of separating slag from water and anti-gushing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910934542.9A CN110541716B (en) | 2019-09-29 | 2019-09-29 | U-shaped closed screw machine anti-gushing system capable of separating slag from water and anti-gushing method |
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| Publication Number | Publication Date |
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| CN110541716A CN110541716A (en) | 2019-12-06 |
| CN110541716B true CN110541716B (en) | 2020-08-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458172B (en) * | 2020-04-30 | 2022-02-22 | 中铁工程装备集团有限公司 | Anti-surging test bed for screw conveyor and test method thereof |
| CN111577306A (en) * | 2020-05-25 | 2020-08-25 | 中铁二十三局集团有限公司 | Improved structure applied to water-rich sandy gravel stratum shield machine and construction method |
| CN111706349A (en) * | 2020-06-29 | 2020-09-25 | 中国铁建重工集团股份有限公司 | Shield constructs quick-witted dregs conveying system |
| CN112324453B (en) * | 2020-11-12 | 2022-12-23 | 安徽唐兴装备科技股份有限公司 | Anti-surging screw conveyor |
| CN112901180B (en) * | 2021-01-29 | 2022-11-04 | 中铁二十一局集团轨道交通工程有限公司 | Construction method for air-entrapping drainage tunneling of earth pressure balance shield |
| CN112901202B (en) * | 2021-03-19 | 2024-03-15 | 中铁三局集团有限公司 | Water-rich stratum shield tunneling residue soil collecting and discharging device and collecting and discharging method |
| CN112943271B (en) * | 2021-03-19 | 2024-01-26 | 中铁三局集团第五工程有限公司 | Device and method for preventing gushing and improving shield tunneling efficiency of water-rich stratum |
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