JP4372252B2 - High-lift suction and discharge device for liquid and solid-liquid mixture - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a high-lift suction / discharge device for a liquid and a solid-liquid mixture used for, for example, a muddy water treatment of a segment invert in a shield method.
[0002]
[Prior art and its problems]
As shown in FIG. 2, a suction / discharge device is known in which the liquid or solid-liquid mixture recovered into the suction / discharge tank 102 by the suction action of the vacuum pump 113 is discharged by the discharge action of the drainage pump 116. However, it is difficult to suck and discharge at a high head, and when the collected material contains a large amount of solids, only the liquid is discharged, and the solids remain in the suction and discharge tank 102 or in the pumping pipe 108. In this case, blockage due to solid content occurs.
[0003]
As a countermeasure for solving this problem, the solid content recovery tank 101 is detachably interposed in the suction pipe 104, and the solid-liquid mixture sucked by the suction action of the vacuum pump 113 is temporarily stored in the solid content recovery tank 101. Only the liquid component separated by gravity is transferred into the suction / discharge tank 102 and discharged through the pumping pipe 108 by the discharge action of the drain pump 116, and the solid content recovery tank 101 filled with solid content is drawn into the suction pipe. A measure is taken to remove the solid from the passage 104, lift it out of the mine, discharge the solid, and lower the solid collection tank 101 again into the mine and connect it to the suction pipe 104. However, this complicated work not only requires a great deal of labor, but also has the disadvantage that the suction and discharge work must be interrupted during that time.
[0004]
OBJECT OF THE INVENTION
The object of the present invention is to eliminate the above-mentioned conventional drawbacks, and even when the collected material contains a large amount of solids, the discharge through the lifting pipeline is performed powerfully and smoothly, and the solids are contained in the suction / discharge tank. An object of the present invention is to provide an apparatus that is excellent in workability without remaining and does not cause clogging in the pumping pipe, and is extremely effective for high-pump intake / discharge of a high-concentration slurry.
[0005]
[Structure of the invention]
In the high-lift suction / discharge device for liquid and solid-liquid mixture according to the present invention, the lower bottom portion of the primary recovery tank located above is electrically connected to the secondary recovery tank located below via the switching valve, and the primary recovery tank The leading end of the suction pipe led out from is opened to the supply source of the liquid or solid-liquid mixture, and the upper part of the primary recovery tank is communicated with the suction port of the vacuum generator via the intake pipe, and the upper part of the secondary recovery tank A pressure sensor is attached to the part, and a pumping pipe is extended from the lower part via a pressure-feeding on-off valve. It opens into the secondary recovery tank through the valve, and the other passage of the air supply pipe is opened from the secondary side of the on-off valve for pressure feed into the uplift pipe line through the on-off valve for pressurization and pressure. The upper part of the recovery tank communicates with the upper part of the primary recovery tank The discharge port of the drainage auto pump, which is conducted by the vent pipe through the on-off valve, opens the suction port into the primary recovery tank and operates according to the detection signal of the water level detector, is connected to the pumping line through the discharge check valve. It is connected.
[0006]
【Example】
The embodiment of the present invention will be described below with reference to FIG.
[0007]
Reference numeral 1 denotes a primary recovery tank, and reference numeral 2 denotes a secondary recovery tank, and a lower bottom portion of the primary recovery tank 1 positioned above is connected to a secondary recovery tank 2 positioned below via a switching valve 3. Reference numeral 4 denotes a suction pipe led out from the primary recovery tank 1, and the leading end of the suction pipe is opened to a supply source such as muddy water and freight. 5 is an intake pipe that is led out from the upper part of the primary recovery tank 1 and communicates with the suction port of the vacuum generator 6, 7 is a pressure sensor attached to the upper part of the secondary recovery tank 2, and 8 is a secondary recovery tank A lifting pipe 10 led out from a lower part in 2 and led through a pressure on / off valve 9 is a ventilation pipe for electrically connecting an upper part of the secondary recovery tank 2 and an upper part of the primary recovery tank 1. Yes, a communication on-off valve 11 is interposed. An air supply pipe 12 is led out from the compressor 13 and is branched into two paths. One path 12A is opened into the secondary recovery tank 2 through a pressure discharge on / off valve 14, and the other one path 12B is pressurized and pressurized. An opening / closing valve 15 opens from the secondary side of the pressure-feeding opening / closing valve 9 into the lifting pipeline 8. Reference numeral 16 denotes a drainage autopump that operates in accordance with a detection signal from the water level detector 17. .
[0008]
[Action]
When the vacuum generator 6 is driven, the switching valve 3 and the communication on-off valve 11 are open, and the pressure discharge on-off valve 14 is closed, the pressure in the primary recovery tank 1 and the secondary recovery tank 2 is reduced. The Therefore, if the leading end of the suction pipe 4 is opened to a supply source such as muddy water or waste, the collected material that has been sucked flows from the primary recovery tank 1 through the switching valve 3 into the secondary recovery tank 2. If the collected material continues to be sucked, the solid content is stored in the secondary recovery tank 2 due to the difference in specific gravity, and the liquid level in the primary recovery tank 1 gradually rises. 16 is driven, and the liquid passes through the discharge check valve 18 and reaches the inside of the lifting pipe 8. However, the compressor 13 is driven to open the pressurized / pressure-feeding on / off valve 15, so that the compressed air is pumped up. It is injected into the pipe line 8, becomes a gas-liquid mixed state, and is discharged to a predetermined disposal place by the lifting pipe line 8. On the other hand, the solids stored in the secondary recovery tank 2 are discharged timely by a timer, but the primary recovery tank 1 and the secondary recovery tank 2 are defined by closing the switching valve 3 and the on-off valve 11 for communication. Since it is shielded and the decompressed state in the primary recovery tank 1 is maintained, the recovery operation from the supply source is continued. The pressurized pressure on-off valve 15 is closed and the pressure on-off valve 9 and the pressure discharge on-off valve 14 are opened, so that the stored solids in the secondary recovery tank 2 are discharged at once by the compressed air. If the pressure in the secondary recovery tank 2 decreases to a predetermined value, it is determined that the discharge of the stored solids in the secondary recovery tank 2 has been completed by the detection action of the pressure sensor 7. Until then, the recovered material from the supply source is temporarily stored in the primary recovery tank 1 and the discharge of the stored material in the secondary recovery tank 2 is completed, that is , the pressure on-off valve 9 reverse to the valve operation and Secondary operation is performed by closing the pressurizing discharge on / off valve 14 and opening the pressurizing / pressure feeding on / off valve 15 and opening the communication on / off valve 11 while suppressing clogging of the slurry remaining in the lifting pipe 8. After the inside of the recovery tank 2 is decompressed in the same manner as in the primary recovery tank 1, the switching valve 3 is opened and the stored matter in the primary recovery tank 1 flows down into the secondary recovery tank 2.
[0009]
By repeating this operation as one cycle, the continuous recovery and intermittent discharge action of the liquid or solid-liquid mixture can be performed smoothly and powerfully. Note that the pressurizing and pressure-feeding on / off valve 15 may be normally opened while the pressure-feeding on / off valve 9 is closed .
[0010]
【The invention's effect】
According to the suction and discharge device of the present invention, among the solid-liquid mixture recovered by the suction action of the vacuum generator, the liquid pumping action performed by the drain auto pump is strongly assisted by the pressurizing and pumping action of the compressor, The discharge of solids is extremely powerful in combination with the pressurized discharge action applied from the compressor into the secondary recovery tank and the pressurized pressure delivery action applied into the lifting line. Therefore, even if the recovered material contains a large amount of solids, it is reliably discharged without remaining in the recovery tank, and functions extremely effectively as a high-pump intake / exhaust for high-concentration slurry. Further, since the structure is simple and can be configured in a small size, it is suitable for use in a narrow working site, for example, a shaft and a shaft shaft in a shield method.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a pipeline system in the suction / discharge device of the present invention.
FIG. 2 is an explanatory view illustrating a pipeline system in a conventional suction / discharge device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Primary collection tank 2 Secondary collection tank 3 Switching valve 4 Suction pipe 5 Intake pipe line 6 Vacuum generation device 7 Pressure sensor 8 Lifting pipe 9 Pressure on-off valve 10 Vent pipe 11 Communication on-off valve 12 Inlet pipe 12A Inlet pipe Branched one path 12B Other branched path 13 Compressor 14 Pressurization discharge on / off valve 15 Pressurization / pressure feed on / off valve 16 Drain autopump 17 Water level detector 18 Discharge check valve

Claims (1)

The lower bottom of the primary recovery tank located above is connected to the lower secondary recovery tank via a switching valve, and the tip of the suction pipe led out from the primary recovery tank supplies liquid or solid-liquid mixture. The upper part of the primary recovery tank is connected to the suction port of the vacuum generator by an intake pipe, and a pressure sensor is attached to the upper part of the secondary recovery tank, and a pressure-feeding on-off valve is provided from the lower part. The air supply pipe is extended through the air supply pipe, the air supply pipe led out from the compressor is branched, and one path is opened into the secondary recovery tank through the pressure discharge on-off valve, and the other air supply pipe is One path is opened from the secondary side of the pressure-feeding on / off valve through the pressurized pressure-feeding on-off valve into the pumping pipe, and the upper part of the secondary recovery tank and the upper part of the primary recovery tank are connected to the on-off valve. Through the vent pipe, the suction port is the primary recovery tank The discharge port of a drainage autopump that is opened by a water level detector and is operated by a detection signal from a water level detector is connected to a pumping line through a discharge check valve. About intake and exhaust device.

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