JPH0121360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid suction and discharge device, and is particularly suitable for treating muddy water in segment inverts in shield construction methods.

Conventionally, for segment invert muddy water treatment in the shield construction method, a pump is moved directly to the work site, and after collection, it is transported outside the mine using a trolley. In this way, the work of collecting muddy water and the work of disposing of muddy water are performed as separate and separate works, resulting in poor work efficiency, and also the work of treating standing water on the floor, cleaning tank bottom water, settled earth, sludge in side gutters, etc. In,
This method has a number of problems, including space constraints at the work site and a heavy labor burden.

In order to solve the above-mentioned problems, the device of the present invention has a cooling water tank connected to a vacuum pump, and a separation tank equipped with a submersible pump. The starting end is opened to lead out to the liquid supply source, and the terminal end is opened into the separation tank, and the intake port of the vacuum pump is communicated with the upper part of the storage tank, and the exhaust port is opened above the water surface in the cooling water tank. In addition, the water intake port is introduced and opened below the water surface of the cooling water tank, and further an exhaust path is formed from above the water surface to the outside of the cooling water tank, and the suction port of the submersible pump is opened into the separation tank, and the discharge port is opened into the separation tank. A sealed door is installed so that one side of the separation tank can be opened and closed in a side-opening manner, and a submersible pump is attached to the inside of the door, and the inside of the separation tank and water suction pipe are kept in a vacuum state by driving the vacuum pump. Then, the liquid and sediment from the supply liquid source flow into the separation tank, and the liquid and sediment separated from the gas by gravity in the separation tank are discharged out of the separation tank by driving a submersible pump, and The gas separated from the liquid and sediment is sucked from the upper part of the separation tank to the intake port of the vacuum pump, combined with the cooling water sucked from the water intake port, and then returned to the cooling water tank from the exhaust port. The vacuum pump is cooled, and only the gas separated from the cooling water is discharged outside the cooling water tank from the exhaust path above the water surface. During maintenance and inspection of the submersible pump, the submersible pump is cooled when the airtight door is opened. It is designed so that it can be led out of the separation tank.

In the drawings of the embodiment, T ₁ is a cooling water tank connected to a vacuum pump 1, and T ₂ is a separation tank in which a submersible pump 2 is installed. Cooling water tank T ₁
The vacuum pump 1 communicates with the upper part of the separation tank _T2 through its intake port 1a, opens its exhaust port 1b onto the water surface in the cooling water tank _T1 , and connects its water intake port 1c with the upper part of the separation tank T2. It is installed above the cooling water tank _T1 with the introduction opening below the water surface in the tank _T1 . Reference numeral 7 denotes a sealed door that is attached so that one side of the separation tank T ₂ can be opened and closed in a side-opening manner. By installing the submersible pump 2 on the inner surface of the door, the submersible pump 2 is closed when the sealed door 7 is closed. The suction port 2a is opened to the lower part of the separation tank _T2 , and the discharge port 2b is opened to the outside of the separation tank _T2 , and when the sealing door 7 is opened, the separation tank _T2 is opened to the side. At the same time, the submersible pump 2 is led out of the separation tank _T2 .
The water suction pipe 3 that penetrates the inside of the cooling water tank T ₁ is laid down with its starting end 3 a leading out to the liquid supply source 4 and its terminal end 3 b opening downward into the separation tank T ₂ . Ru. Reference numeral 5 denotes an exhaust passage led out from above the water surface in the cooling water tank T ₁ to outside the cooling water tank T ₁ , and communicates with the exhaust port 1 b of the vacuum pump 1 above the water surface in the cooling water tank T ₁ . It's summery. 8a is a water inlet for injecting cooling water into the cooling water tank _T1 , 8b is a vacuum pump 1
These water inlets 8a and 8b are opened and closed by operating valves, respectively. Note that E ₁ to E ₄ are electrode type water level detectors disposed in the separation tank T ₂ and are surrounded by a breakwater pipe 9 on the circumferential side, so that, for example, the water level in the separation tank T ₂ can be detected. When the water level in the separation tank T ₂ rises to the sensing part of the water level detector E ₂ , the submersible pump 2 is activated, and when the water level in the separation tank T 2 rises to the sensing part of the water level detector E ₁ , the vacuum pump 1 stops, and the water level in the separation tank T ₂ Automatic operation control is performed in which the vacuum pump 1 is activated when the water level falls to the sensing part of the water level detector E ₃ , and if necessary, the vacuum pump 1 and the submersible pump 2 are activated by manual operation of the switch.
It is electrically connected so that it can be driven and stopped.

When using the device of the present invention, the valves are opened to open the water inlets 8a and 8b, respectively, and cooling water is injected into the cooling water tank _T1 , and priming water is injected into the vacuum pump 1. When the injection is finished, The valves are closed to close the water inlets 8a and 8b, respectively.
To explain the case where the device of the present invention is used for collecting muddy water from the liquid supply source 4 and discharging it to a predetermined disposal site, the starting end 3a of the water suction pipe 3
At the same time, connect a water suction hose to the tube and introduce its open end into a predetermined liquid supply source 4, and connect a discharge hose to the discharge port 2b of the submersible pump 2 and bring the open end to a predetermined disposal location. The vacuum pump 1 is driven in the distracted state. By driving the vacuum pump 1, a vacuum is created in the separation tank _T2 and the water suction pipe 3, and a mixture of earth and sand, water, air, etc. is collected from the liquid supply source 4 into the separation tank _T2 . When the water level in the separation tank _T2 rises and reaches a predetermined level, the submersible pump 2 is driven by manual operation of a switch or by automatic switching of the circuit by the water level detector _E2 . The gas and liquid sucked from the starting end 3a of the water suction pipe 3 and collected from the terminal end 3b into the separation tank _T2 rises from the lower part of the separation tank _T2 while rotating, and is caused by centrifugal force and gravity. A separation effect occurs, and only the gas is collected in the upper part of the separation tank _T2 ,
Earth, sand, sludge, etc. are discharged together with liquid to a predetermined disposal site by the action of the submersible pump 2. separation tank
If the amount of water absorbed in T ₂ becomes greater than the amount of water discharged and the water level rises abnormally, creating a risk of muddy water flowing into the vacuum pump 1, the water level will be turned off by manual operation of the switch or by turning on the circuit using the water level detector E ₁ . With automatic switching of
The vacuum pump 1 is stopped to prevent the risk of muddy water flowing in. Submersible pump 2 continues draining water, separating tank T ₂
When the water level in the vacuum pump 1 falls, the vacuum pump 1 starts operating again by manual operation of the switch or by automatic switching of the circuit by the water level detector _E3 . In this way, by manual operation of the switch or automatic switching of the circuit, it is possible to drive and stop the vacuum pump 1 and the submersible pump 2 in a timely manner and maintain the water level in the separation tank T ₂ at an appropriate level. . However, in order to collect and discharge muddy water in an uninterrupted and stable manner, an operation method is proposed in which the vacuum pump 1 is automatically stopped at a dangerous water level to protect it from sewage, and then restarted automatically when the water level drops. It is preferable that the submersible pump 2 be driven continuously regardless of fluctuations in the water level, and that it can be stopped by manual operation of a switch at any time when it becomes necessary to stop the submersible pump 2. The gas separated from the liquid in the separation tank _T2 is
The vacuum pump 1 is cooled in the process of being sucked into the intake port 1a of the vacuum pump 1 from the upper part of T ₂ and flowing back into the cooling water tank T ₁ from the exhaust port 1b together with the cooling water sucked from the water intake port 1c. , only the gas separated from the cooling water is discharged from the exhaust passage 5 above the water surface to the _outside of the cooling water tank T1, and the cooling water that has been returned to the cooling water tank _T1 is sucked back through the water intake port 1c. This cools the vacuum pump 1. When performing maintenance and inspection of the submersible pump 2, when the sealed door 7 is opened, the submersible pump 2 is led out of the separation tank _T2 .

As mentioned above, in the device of the present invention, the water suction pipe 3
The starting end 3a of the submersible pump 2 is opened to lead out to the liquid supply source 4, and the discharge port 2b of the submersible pump ₂ is opened to lead out to the outside of the separation tank T2. It is possible to collect muddy water from a remote supply source 4 by simply extending the water suction hose without moving it, and water suction work is possible even in narrow tunnels or places where general pumps cannot enter. , the space around the work is wide and workability is good. In addition, muddy water can be discharged to a remote disposal site simply by extending the discharge hose, and this discharge work is performed consistently and continuously with the above-mentioned collection work, significantly reducing work time. This saves time and eliminates the need to transport muddy water using carts after collection, which is extremely efficient. In this way, there is an advantage that work that conventionally relied on a large number of people can be done in a short time by a very small number of people. Furthermore, since the muddy water recovery operation by the vacuum pump 1 is accompanied by a cooling effect through the circulation of cooling water, it can withstand continuous operation for long periods of time. When the sealed door 7 is opened, the submersible pump 2 is led out of the separation tank _T2 , which is extremely convenient for maintenance and inspection.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a main part of the apparatus of the present invention, where A shows the state when the separation tank is closed and B shows the state when the separation tank is opened. FIG. 2 is an explanatory diagram showing an example of use of the device of the present invention. T ₁ ... Cooling water tank, T ₂ ... Separation tank, 1
...Vacuum pump, 1a...Intake port, 1b...Exhaust port, 1c...Water intake port, 2...Submersible pump, 2a...
...Suction port, 2b...Discharge port, 3...Water suction pipe, 3a
...Starting end, 3b...Terminal end, 4...Liquid source, 5
...Exhaust path, 7...Hermetic door.

Claims (1)

[Claims] 1 Cooling water tank T ₁ connected to vacuum pump 1
and a separation tank T ₂ in which a submersible pump 2 is installed, and the starting end 3 a of the water suction pipe 3 that penetrates inside the cooling water tank T ₁ is led out to the liquid supply source 4 and the terminal end 3 b is separated. The intake port _1a of the vacuum pump 1 is opened into the tank T2, and the intake port 1a of the vacuum pump 1 is communicated with the upper part of the storage tank _T2 , and the exhaust port 1b is opened onto the water surface in the cooling water tank _T1 , and the water intake port 1c is cooled. Exhaust passage 5 that is introduced and opened below the water surface of the water tank T ₁ and further led out from above the water surface to the outside of the cooling water tank T ₁
The suction port 2a of the submersible pump 2 is opened into the separation tank _T2 , and the discharge port 2b is opened to the outside of the separation tank _T2 .
A liquid suction/drainage device characterized in that a sealed door 7 is provided so that one side of the T ₂ can be opened and closed in a side-opening manner, and a submersible pump 2 is attached to the inner surface of the sealed door 7.