JP2000186689A - High pump head intake/discharge device of liquid and solid-liquid mixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high pump head intake/discharge device with which discharge is intensively and smoothly performed even when mush solid is contained in recovered substance, excellent operability is shown without leaving solid in a recovery tank nor blocking a pumping passage, slurry of high density is effectively sucked and discharged with high pump head. SOLUTION: The bottom side of a primary recovery tank 1 from which a suction pipe 4 is led communicates with the upper side of a secondary recovery tank 2 from which a pumping passage 8 is led through an opening/closing valve 9, by means of a changeover valve 3. A suction port of a vacuum generation device 6 communicates with the inside space of the first recovery tank 1. A gas feed pipe 12 from a compressor 13 is opened to the secondary recovery tank 2 an the pumping passage 8, respectively through opening/closing valves 14, 15. The upper side of the secondary recovery tank 2 communicates with the upper side of the primary recovery tank 1 through an opening/closing valve 11 and a bleed pipe 10. A water discharge automatic pump 16 has a suction port opened to the primary recovery tank 1 and a discharge port connected to the pumping passage 8 through a check valve 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-head suction / discharge device for a liquid / solid-liquid mixture, which is used for muddy water treatment of inverts of segments in a shield method, for example.

[0002]

2. Description of the Related Art As shown in FIG. 2, a suction / discharge device for discharging a liquid or a solid-liquid mixture collected into a suction / discharge tank 102 by a suction operation of a vacuum pump 113 by a discharge operation of a drain pump 116 is provided. It is known. However, it is difficult to suck and discharge at a high head, and when a large amount of solids is contained in the collected material, only the liquid is discharged, and the solids remain in the suction / discharge tank 102 or the pumping pipe 108 In this case, blockage due to solid components occurs.

[0003] As a countermeasure to solve this, a suction pipe 10
4, the solid component recovery tank 101 is detachably interposed, and the solid-liquid mixture sucked by the suction action of the vacuum pump 113 is temporarily stored in the solid component recovery tank 101, and the liquid component separated by gravity is removed. Only the solids are transferred into the suction / discharge tank 102 and discharged through the water pump 108 by the discharge action of the drain pump 116. The solids recovery tank 101, which is full of solids, is removed from the suction pipe 104 and pulled out of the pit. After the solids are discharged, means for lowering the solids recovery tank 101 again into the pit and connecting it to the suction pipe 104 is taken. However, such a complicated work requires not only a great deal of labor but also a drawback that the suction and discharge work must be interrupted during that time.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the drawbacks of the prior art, and to discharge strongly and smoothly through a discharge pipe even when a large amount of solids is contained in a collected material. It is an object of the present invention to provide an apparatus which is excellent in workability without solid matter remaining therein and does not cause clogging in a pumping line, and is particularly effective in sucking and discharging a high concentration slurry at a high head.

[0005]

In the high-head suction and discharge device for a liquid and solid-liquid mixture according to the present invention, the lower bottom portion of the upper primary recovery tank is in communication with the lower secondary recovery tank via a switching valve. The leading end of the suction pipe led out from the primary recovery tank is opened to the supply source of the liquid or solid-liquid mixture, and the upper part of the primary recovery tank is connected to the suction port of the vacuum generator by the suction pipe, and A pressure sensor is attached to the upper part of the next recovery tank, and a lifting pipe is extended from the lower part via a pressure-feeding on-off valve, and an air pipe led out of the compressor is branched. Opened into the secondary recovery tank via a pressurized discharge on-off valve, and another path of the air supply pipe is opened from the secondary side of the pressure feed on-off valve through the pressurized pressure on-off valve into the lifting line. The upper part of the secondary collection tank and the primary collection tank. The drain is connected to the first part of the primary recovery tank through the open / close valve for communication, and the suction port is opened to the primary recovery tank. Connected to the lifting pipeline.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 denotes a primary recovery tank, and reference numeral 2 denotes a secondary recovery tank. The lower bottom of the primary recovery tank 1 located above is electrically connected to the secondary recovery tank 2 located below via the switching valve 3. I have. Reference numeral 4 denotes a suction pipe led out of the primary recovery tank 1 and its leading end is opened to a supply source such as muddy water or dredged material. 5 is an intake pipe drawn out from the upper part of the primary recovery tank 1 and communicating 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, 8 is a lifting pipe led out from a lower part in the secondary recovery tank 2 and extended through an on-off valve 9 for pressure feeding, 10 is This is a ventilation pipe that connects the upper part of the secondary recovery tank 2 and the upper part of the primary recovery tank 1, and is provided with a communication on-off valve 11. Reference numeral 12 denotes an air supply pipe derived from the compressor 13, which is branched into two paths, one path 12A of which is opened into the secondary recovery tank 2 via a pressurizing / discharging on-off valve 14, and another path 12B which is pressurized and fed. The opening / closing valve 15 is opened from the secondary side of the on-off valve 9 for pressure feed into the lifting line 8. Reference numeral 16 denotes a drainage auto-pump operated by a detection signal of a water level detector 17. The suction port is opened into the primary recovery tank 1, and the discharge port is connected to the pumping line 8 via a discharge check valve 18. .

[0008]

When the vacuum generator 6 is driven, the switching valve 3 and the communication on-off valve 11 are open, and the pressurizing / discharging on-off valve 14 is closed, the inside of the primary recovery tank 1 and the inside of the secondary recovery tank 2 Is decompressed. Therefore, when the leading end of the suction pipe 4 is opened to a supply source such as muddy water or dredged material, the sucked collected material 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 and the liquid level in the primary recovery tank 1 gradually rises due to the difference in specific gravity. The liquid is passed through the discharge check valve 18 and reaches the pumping line 8 when the compressor 16 is driven, and the compressed air is pumped by driving the compressor 13 to open the pressurizing / pressurizing on-off valve 15. It is injected into the pipe 8, enters a gas-liquid mixed state, and is discharged to a predetermined disposal place by the lifting pipe 8. On the other hand, the solids stored in the secondary recovery tank 2 are discharged at appropriate times by a timer, but when the switching valve 3 and the communication on-off valve 11 are closed, the primary recovery tank 1 and the secondary recovery tank 2 are separated. Since the shield is shielded and the reduced pressure state in the primary recovery tank 1 is maintained, the recovery operation from the supply source is continued. Then, the on-off valve 15 for pressurized pressure feed is closed, and the on-off valve 9 for pressure feed and the on-off valve 14 for pressurized discharge are opened.
The solids stored in the secondary recovery tank 2 are discharged at once by compressed air. However, if the pressure in the secondary recovery tank 2 decreases to a predetermined value, the secondary recovery tank is detected by the pressure sensor 7. Judge that the discharge of stored solids in 2 has been completed. Until then, the collected material from the above-mentioned 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 closing operation of the pressurized discharge on-off valve 14 is stopped. The on-off valve 15 for pressurized pressure feed is opened, and the on-off valve for communication 11
Is opened, the inside of the secondary recovery tank 2 is brought into the same depressurized state as in the primary recovery tank 1, and then the switching valve 3 is opened, and the stored material in the primary recovery tank 1 is moved into the secondary recovery tank 2. Flow down.

By repeatedly performing the above-described operation as one cycle, continuous recovery and intermittent discharge of the liquid or solid-liquid mixture can be smoothly and strongly performed. In addition, the on-off valve 15 for pressurized pressure feed may be always in an open state.

[0010]

According to the suction / discharge device of the present invention, of the solid-liquid mixture recovered by the suction function of the vacuum generator, the pumping action of the liquid performed by the drain auto pump is performed by the pressurizing and pumping function of the compressor. Strongly assisted, 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 pumping action applied within the lifting line. Therefore, even if the collected matter contains a large amount of solids, the solid matter is reliably discharged without remaining in the collection tank, and functions extremely effectively particularly for suctioning and discharging a high-concentration slurry at a high head. In addition, since it is simple in structure and can be configured in a small size, it is suitable to be used by being carried into a narrow working site, for example, a shaft and a shaft in a shield method.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a pipeline system in a suction / discharge device of the present invention.

FIG. 2 is an explanatory view exemplifying 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 6 Vacuum generator 7 Pressure sensor 8 Lifting pipe 9 Pressure opening / closing valve 10 Vent pipe 11 Communication opening / closing valve 12 Air supply pipe 12A Branched one path 12B Other branched path of air supply pipe 13 Compressor 14 Pressurized discharge on-off valve 15 Pressurized pressure on-off valve 16 Drainage auto pump 17 Water level detector 18 Discharge check valve

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Takahira 4-16-40, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka Inside Tsurumi Seisakusho (72) Inventor Hideaki Kanaya 4--16, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka No. 40 Tsurumi Manufacturing Co., Ltd. F-term (reference) 2D054 AC01 DA12 DA35 GA33 GA37 GA58 GA65 GA81 GA95

Claims (1)

[Claims] 1. A lower bottom portion of a primary recovery tank located above is communicated with a secondary recovery tank located below via a switching valve, and a tip of a suction pipe led out of the primary recovery tank is liquid or solid. It is opened to the supply source of the 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 it is connected from the lower part. The pumping line is extended through the on-off valve for pressure feed, the air supply pipe derived from the compressor is branched, and one of the lines is opened into the secondary recovery tank via the on-off valve for pressurized discharge, Another path of the air supply pipe is opened from the secondary side of the on-off valve for pressure feed to the pumping line via the on-off valve for pressurized pressure feed, and is opened into the upper part of the secondary recovery tank and the upper part of the primary recovery tank. Is conducted by the ventilation pipe through the open / close valve for communication, and the suction port is closed. A discharge port of a drainage auto pump that is opened into the next recovery tank and is operated by a detection signal of a water level detector is connected to a pumping line via a discharge check valve; liquid and solid-liquid. High head suction and discharge device for mixture.