CN117027831A - Automatic pressure supplementing device for shield mud water bin - Google Patents
Automatic pressure supplementing device for shield mud water bin Download PDFInfo
- Publication number
- CN117027831A CN117027831A CN202311153434.0A CN202311153434A CN117027831A CN 117027831 A CN117027831 A CN 117027831A CN 202311153434 A CN202311153434 A CN 202311153434A CN 117027831 A CN117027831 A CN 117027831A
- Authority
- CN
- China
- Prior art keywords
- pressure
- automatic
- mud
- muddy water
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 44
- 238000003860 storage Methods 0.000 claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 239000013589 supplement Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 3
- 210000000038 chest Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 relates to an automatic pressure supplementing device for a shield slurry bin, wherein a slurry tank and a gas storage tank are arranged on a trolley, an existing air compressor and a slurry pump on the trolley are respectively connected with the gas storage tank and the slurry tank through pipelines, and the slurry tank is connected with a reserved hole at a chest plate of a shield machine through a pipeline; according to different working states, a pneumatic ball valve, a pressure sensor and a liquid level sensor are arranged on the pipeline; the pneumatic ball valve, the pressure sensor, the liquid level sensor, the air compressor and the grouting pump are connected with the PLC automatic control system, the PLC automatic control system is used for linkage, and when the pressure of the muddy water bin is lower than a target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure. When the pressure of the muddy water bin is lower than the target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure, so that the pressure of the muddy water bin is kept balanced with the front water and soil pressure of the excavation surface continuously, the stability of the soil body of the excavation surface is maintained, and the purpose of controlling the sedimentation of the traversed structures is achieved.
Description
Technical Field
The invention relates to a complete device for automatically supplementing pressure to a slurry tank and maintaining slurry balance aiming at a special working condition that a slurry tank is out of pressure when a slurry balance shield machine penetrates through a building in a short distance.
Background
The planned tunnel is often required to traverse an underground structure in a short distance due to the restriction of planning and existing structures in the selection of the line. In particular, slurry balance shield engineering penetrating through the existing structure in a short distance often causes the penetrated structure and ground subsidence due to the decompression of the slurry bin. Therefore, an automatic pressure supplementing device is needed to be provided for maintaining the stability of the pressure of the slurry cabin of the shield machine under the special working condition, and when the pressure of the slurry cabin is lower than a target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure, so that the pressure of the slurry cabin is continuously balanced with the front water-soil pressure of an excavation surface to maintain the stability of the soil body of the excavation surface, and the aim of controlling the sedimentation of a traversed structure is fulfilled.
Disclosure of Invention
The invention aims to provide an automatic mud water bin pressure supplementing device which is used as an emergency standby device under the construction working condition that a shield closely penetrates through a subway tunnel so as to achieve the purpose of controlling the settlement of the penetrated subway tunnel.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the automatic pressure supplementing device for the shield slurry bin comprises an air storage tank, an air compressor, a slurry tank, a slurry pressing pump, a pneumatic ball valve, a pressure gauge, a pressure sensor and a PLC automatic control system, wherein the slurry tank and the air storage tank are arranged on a trolley, the existing air compressor and the slurry pressing pump on the trolley are respectively connected with the air storage tank and the slurry tank through pipelines, and the slurry tank is connected with a reserved hole at a breast plate of a shield machine through a pipeline; according to different working states, a pneumatic ball valve, a pressure sensor and a liquid level sensor are arranged on the pipeline; the pneumatic ball valve, the pressure sensor, the liquid level sensor, the air compressor and the grouting pump are connected with a PLC automatic control system, and are linked through the PLC automatic control system, and when the pressure of the muddy water bin is lower than a target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure.
Further, pressure sensors are arranged at the reserved holes of the chest plates and the air storage tank, and a liquid level sensor is arranged at the muddy water tank.
Further, the automatic pressure supplementing device for the muddy water bin has four working states of routine, starting, air supplementing and water supplementing.
Further, when the gas pressure in the gas storage tank is lower than the minimum gas pressure limit value, the air compressor is automatically started to convey gas into the gas storage tank, and the gas pressure is increased; when the gas pressure in the gas storage tank reaches the maximum gas pressure limiting value, the air compressor automatically stops working.
Further, when the water level in the mud water tank is lower than the minimum limiting liquid level, the pressure drop pump is automatically started to convey mud water into the mud water tank; when the water level in the mud water tank reaches the highest limiting liquid level, the grouting pump automatically stops working.
Further, in the process of conveying the muddy water to the muddy water bin, when the water level in the muddy water tank falls to the minimum limiting liquid level height, the muddy water is automatically stopped from being conveyed to the muddy water bin; the minimum limit liquid level in the mud water tank is higher than the mud outlet of the mud water tank, so that gas in the gas storage tank is prevented from entering the mud water tank in the pressure supplementing process.
Further, the pressure at the reserved hole of the chest plate is recorded as outlet pressure, when the outlet pressure is lower than a set target pressure value, the pneumatic ball valve is automatically opened, and the muddy water in the muddy water tank is conveyed to a muddy water tank in front of the chest plate under the action of the pressure difference between the air pressure of the air storage tank and the pressure of the muddy water tank; the automatic start-stop system of the air compressor and the grouting pump is integrated with the automatic start-stop system of the pneumatic ball valve through the PLC automatic control system, muddy water is automatically conveyed to the muddy water bin through the outlet pressure sensor, the pressure of the muddy water bin is regulated, and the pressure of the muddy water bin is kept constant.
Further, the minimum air pressure limiting value of the air storage tank is higher than the target pressure value by 0.1MPa, and the maximum air pressure limiting value is higher than the target pressure value by 0.2MPa.
The invention has the beneficial effects that:
aiming at the problems of crossing a building (structure) and ground subsidence caused by the decompression of a slurry cabin in the tunneling process of a shield machine, a set of slurry automatic cabin pressure supplementing device is additionally arranged by improving shield equipment, and a linkage device is formed by utilizing the technology of a PLC automatic control system, so that the device has the characteristics of automatic pressure supplementing, simplicity and easiness in operation, low manufacturing cost, reliable performance, high control precision and the like. When the pressure of the slurry tank is lower than the target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure, the set of equipment is convenient to operate, the pressure supplementing control precision is high, the problem of pressure loss of the slurry tank is well solved, and the problem of sedimentation caused by the pressure loss in shield tunneling is effectively controlled.
Drawings
FIG. 1 is a schematic diagram of an automatic pressure compensating device for a shield slurry tank;
FIG. 2 is a schematic diagram of a conventional state of an automatic pressure compensating device for a shield slurry cabin;
FIG. 3 is a schematic view of the automatic pressure compensating device for shield mud in the invention in an activated state;
FIG. 4 is a schematic diagram of the water replenishing state of the automatic pressure replenishing device of the shield mud water bin;
FIG. 5 is a schematic diagram of the air supplementing state of the automatic pressure supplementing device of the shield slurry warehouse.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1 to 5, the automatic pressure supplementing device for the shield mud sump of the invention comprises an air storage tank 12, an air compressor, a mud water tank 9, a mud pump, a pneumatic ball valve, pressure gauges 2 and 14, pressure sensors 1 and 13 and a PLC automatic control system.
A set of matched mud water tank and air storage tank which have enough volume, absolute sealing, simplicity, convenience and practicability are manufactured according to the size of the shield trolley.
Firstly, placing a mud water tank 9 and an air storage tank 12 on a trolley, connecting an existing air compressor and a grouting pump on the trolley with the air storage tank 12 and the mud water tank 9 through pipelines, and reserving 2 inch holes at the chest plate of the shield tunneling machine with the mud water tank 9 through pipelines.
And a pneumatic ball valve, a pressure sensor and a liquid level sensor are arranged on the pipeline according to different working states. The chest plate reserved hole and the air storage tank 12 are respectively provided with a pressure sensor and a pressure sensor 13, and the muddy water tank 9 is provided with a liquid level sensor.
The pneumatic ball valve, the pressure sensor, the liquid level sensor, the air compressor and the grouting pump are connected with the PLC automatic control system, the PLC automatic control system is used for linkage, and when the pressure of the muddy water bin is lower than a target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure.
When the gas pressure in the gas storage tank 12 is lower than the minimum gas pressure limit value, the air compressor is automatically started to convey gas into the gas storage tank 12, and the gas pressure is increased; when the gas pressure in the gas storage tank 12 reaches the maximum gas pressure limit value, the air compressor automatically stops working. A mud pump is arranged corresponding to the mud water tank 9, and when the water level in the mud water tank 9 is lower than the minimum limiting liquid level, the pressure drop pump is automatically started to convey mud water into the mud water tank; when the water level in the mud water tank 9 reaches the highest limiting liquid level, the grouting pump automatically stops working. 2 cun holes are reserved at the chest plate of the shield machine and the mud water tank are connected through a pipeline, a 2 cun pneumatic ball valve is arranged on a connecting pipeline, a pressure gauge 2 and a pressure sensor 1 are arranged at the reserved 2 cun holes, the pressure is recorded as outlet pressure, when the outlet pressure is lower than a set target pressure value, the 2 cun pneumatic ball valve is automatically opened, and mud water in the mud water tank 9 is conveyed to a mud water bin in front of the chest plate under the action of the pressure difference between the air pressure of an air storage tank 12 and the pressure of the mud water bin. The automatic start-stop system of the air compressor and the grouting pump, the automatic start-stop system of the pneumatic ball valve and the automatic start-stop system of the pneumatic ball valve are integrated with the outlet pressure sensor 1 through the PLC automatic control system, so that muddy water can be automatically conveyed to the muddy water bin, the pressure of the muddy water bin is regulated, and the pressure of the muddy water bin is kept constant.
In the segment assembling process, the muddy water bin is often subjected to decompression; the mud water amount contained by the mud water tank is enough to maintain the mud water conveying amount required by the constant pressure of the mud water bin in the process of assembling a ring pipe sheet; the mud water tank and the air storage tank are easy to process and manufacture, are sealed, do not leak water or air, are simple, practical and convenient to install on the trolley.
The minimum air pressure limit of the air tank 12 is preferably about 0.1MPa above the target pressure value, and the maximum air pressure limit is preferably about 0.2MPa above the target pressure value.
In the process of conveying the muddy water to the muddy water bin by the device, when the water level in the muddy water tank falls to the minimum limiting liquid level height, automatically stopping conveying the muddy water to the muddy water bin; the minimum limit liquid level in the mud water tank is higher than the mud outlet of the mud water tank, so that gas in the gas storage tank is prevented from entering the mud water tank in the pressure supplementing process.
As shown in fig. 2 to 5, the device has four working states of normal operation, starting, air supplementing and water supplementing, and ball valves are required to be installed on pipelines according to different working states so as to meet the opening and closing requirements of valves in different working states.
As shown in figure 2, when the automatic pressure supplementing device of the shield mud water bin is in a normal state, the 7# valve is in an open state, and the 4# valve, the 5# valve, the 6# valve, the 8# valve, the 10# valve, the 16# valve, the 17# valve and the 18# valve are in a closed state.
As shown in figure 3, when the automatic pressure supplementing device of the shield mud water bin is in an activated state, valves No. 4, no. 5, no. 8 and No. 11 are in an opened state, and valves No. 6, no. 10, no. 16, no. 17 and No. 18 are in a closed state.
As shown in fig. 4, when the automatic pressure supplementing device of the shield mud water bin is in a water supplementing state, the 6# valve, the 8# valve and the 10# valve are in an open state, and the 4# valve, the 5# valve, the 7# valve and the 11# valve are in a closed state.
As shown in fig. 5, when the automatic pressure supplementing device of the shield mud water sump is in the air supplementing state, the 17# valve and the 18# valve are in the opening state, and the 11# valve and the 16# valve are in the closing state.
The device needs to automatically convey mud water for pressure compensation according to outlet pressure, the air compressor needs to automatically supplement air according to pressure of the air storage tank, and the grouting pump needs to automatically supplement water according to liquid level, so that pressure sensors are arranged at the reserved hole of the chest plate and the air storage tank, and a liquid level sensor is arranged at the mud water tank.
In the segment assembling process, the static soil pressure is set to be a target pressure value.
The device can automatically monitor the pressure of the mud water bin through the PLC system, and automatically and rapidly supplement the pressure.
Claims (8)
1. The utility model provides a shield constructs automatic pressure compensating device in slurry storehouse which characterized in that: the automatic control system comprises an air storage tank, an air compressor, a mud water tank, a mud pump, a pneumatic ball valve, a pressure gauge, a pressure sensor and a PLC (programmable logic controller), wherein the mud water tank and the air storage tank are arranged on a trolley, the existing air compressor and the mud pump on the trolley are respectively connected with the air storage tank and the mud water tank through pipelines, and the mud water tank is connected with a reserved hole at a chest plate of a shield machine through a pipeline; according to different working states, a pneumatic ball valve, a pressure sensor and a liquid level sensor are arranged on the pipeline; the pneumatic ball valve, the pressure sensor, the liquid level sensor, the air compressor and the grouting pump are connected with a PLC automatic control system, and are linked through the PLC automatic control system, and when the pressure of the muddy water bin is lower than a target pressure value, the automatic pressure supplementing device automatically and rapidly supplements pressure.
2. The automatic pressure supplementing device for a shield mud water sump according to claim 1, wherein: the pressure sensor is arranged at the reserved hole of the chest plate and the air storage tank, and the liquid level sensor is arranged at the muddy water tank.
3. The automatic pressure supplementing device for a shield mud water sump according to claim 1, wherein: the automatic pressure supplementing device for the muddy water bin has four working states of normal operation, starting, air supplementing and water supplementing.
4. The automatic pressure supplementing device for the shield mud water sump according to claim 3, wherein: when the gas pressure in the gas storage tank is lower than the minimum gas pressure limit value, the air compressor is automatically started to convey gas into the gas storage tank, and the gas pressure is increased; when the gas pressure in the gas storage tank reaches the maximum gas pressure limiting value, the air compressor automatically stops working.
5. The automatic pressure supplementing device for the shield mud water sump according to claim 3, wherein: when the water level in the mud water tank is lower than the minimum limiting liquid level, the pressure drop pump is automatically started to convey mud water into the mud water tank; when the water level in the mud water tank reaches the highest limiting liquid level, the grouting pump automatically stops working.
6. The automatic pressure supplementing device for the shield mud water sump according to claim 3, wherein: in the process of conveying the muddy water to the muddy water bin, when the water level in the muddy water tank falls to the minimum limiting liquid level, automatically stopping conveying the muddy water to the muddy water bin; the minimum limit liquid level in the mud water tank is higher than the mud outlet of the mud water tank, so that gas in the gas storage tank is prevented from entering the mud water tank in the pressure supplementing process.
7. The automatic pressure supplementing device for a shield mud water sump according to claim 1, wherein: the pressure at the reserved hole of the chest plate is recorded as outlet pressure, when the outlet pressure is lower than a set target pressure value, the pneumatic ball valve is automatically opened, and the muddy water in the muddy water tank is conveyed to a muddy water tank in front of the chest plate under the action of the pressure difference between the air pressure of the air storage tank and the pressure of the muddy water tank; the automatic start-stop system of the air compressor and the grouting pump is integrated with the automatic start-stop system of the pneumatic ball valve through the PLC automatic control system, muddy water is automatically conveyed to the muddy water bin through the outlet pressure sensor, the pressure of the muddy water bin is regulated, and the pressure of the muddy water bin is kept constant.
8. The automatic pressure supplementing device for a shield mud water sump according to claim 1, wherein: the minimum air pressure limiting value of the air storage tank is higher than the target pressure value by 0.1MPa, and the maximum air pressure limiting value is higher than the target pressure value by 0.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153434.0A CN117027831A (en) | 2023-09-07 | 2023-09-07 | Automatic pressure supplementing device for shield mud water bin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311153434.0A CN117027831A (en) | 2023-09-07 | 2023-09-07 | Automatic pressure supplementing device for shield mud water bin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117027831A true CN117027831A (en) | 2023-11-10 |
Family
ID=88637410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311153434.0A Pending CN117027831A (en) | 2023-09-07 | 2023-09-07 | Automatic pressure supplementing device for shield mud water bin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117027831A (en) |
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2023
- 2023-09-07 CN CN202311153434.0A patent/CN117027831A/en active Pending
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