JP2785149B2 - Continuous suction and discharge device - Google Patents

Description

Description: TECHNICAL FIELD [0001] The present invention relates to a continuous suction / discharge device provided for muddy water treatment of a segment in a shield method, for example.

[Prior art and its problems] As shown in FIG. 4, a solid liquid is collected in a separate tank 1 'by a vacuum pump 3' at a civil engineering work site or the like, and a liquid component of the collected solid liquid is submerged in a submersible pump 9 '. 2. Description of the Related Art A liquid suction / discharge device for transporting a liquid to a predetermined disposal place is known.

However, in this conventional apparatus, although the liquid is automatically discharged, there is no ability to discharge solids, and the solid matter accumulated in the separate tank 1 'is interrupted by the vacuum pump 3'. Must be discharged.

As a method of discharging the solid matter, A. Open the lid 1'c and drop it by gravity from inside the separate tank 1 '.

B. Open the lid 1'c and discharge it manually from the separate tank 1 '.

C. After the solid-liquid is stirred in the separate tank 1 'to make it uniform, air pressure is applied to discharge it from the valve.

Is adopted.

In any of the above methods, it is necessary to interrupt the vacuum holding, so that the work of sucking and discharging the liquid is also interrupted, and continuous sucking and discharging is not performed, which is inefficient. In addition, as a result of not performing such continuous suction and discharge, a large-volume separate tank 1 'is required.

[Object of the Invention] It is an object of the present invention to provide a device that automatically discharges solids and continuously sucks and discharges solids without interrupting vacuum holding in a separate tank. It is in.

[Constitution of the Invention] The continuous suction / discharge device according to the present invention has a separate tank provided with a separate chamber separated from the first chamber by a drain screen, and connects an intake port of a vacuum pump to an upper portion of the separate chamber. A suction pipe is introduced from the first chamber, the leading end of the suction pipe is formed as a solid-liquid suction port, the suction port of the submersible pump is opened into the separate chamber, and the discharge port is drawn out to the outside to form a liquid discharge port. None, the screw feeder is led out from the lower bottom of the first chamber, and its leading end is made a solid discharge port, and the flexible feed tube is attached to the solid discharge port and the flat end is closed flat. A stop valve mechanism was configured.

[Operation] When the device of the present invention is driven by inserting the solid-liquid suction port into the liquid supply source, the inside of the separate tank and the suction pipe is evacuated by the action of the vacuum pump, and the liquid and the earth and sand from the liquid supply source are removed. The gas that flows into the first chamber of the separate tank and is separated from the liquid and the earth and sand by gravity difference is sucked from the upper part of the separate tank to the suction port of the vacuum pump and combined with the cooling water drawn from the water suction port. Then, the vacuum pump is cooled in the process of being returned to the circulating water tank from the exhaust port, and only the gas separated from the cooling water is discharged out of the circulating water tank from the exhaust path above the water surface. Also, solids and a small amount of liquid remain in the first chamber of the separate tank, and most of the liquid is filtered by a drain screen and flows into another chamber. And is continuously and automatically discharged from the liquid discharge port.
The solids are discharged from the lower bottom of the first chamber to a predetermined disposal place together with a small amount of liquid by the action of the screw feeder, and are continuously discharged from the solids discharge port while pushing and expanding the check valve mechanism. .

[Example] An example will be described below with reference to the drawings of the example.

1 is a separate tank, 2 is a drain screen provided in the separate tank 1, and the separate tank 1 is separated from the first chamber 1a by the drain screen 2.
1b.

Reference numeral 3 denotes a vacuum pump installed on the circulating water tank 4, which communicates an intake port 3a with an upper portion in another chamber 1b, and an exhaust port 3b.
To the water surface of the circulating water tank 4 and the water inlet 3c
Into the circulating water tank 4 below the water surface. Reference numeral 5 denotes an exhaust passage led out from the surface of the circulating water tank 4 to the outside of the circulating water tank 4.

Reference numeral 6 denotes a suction pipe drawn from the first chamber 1a of the separate tank 1, and a leading end of the suction pipe serves as a solid-liquid suction port 8 introduced into the liquid supply source 7.

Reference numeral 9 denotes a submersible pump having a suction port 9a opened in the separate chamber 1b.

Reference numeral 11 denotes a screw feeder drawn out from the lower bottom of the first chamber 1a, and a leading end of the screw feeder serves as a solids discharge port 13.

Reference numeral 14 denotes a check valve mechanism in the form of a flexible tube attached to the solids discharge port 13. For example, as shown in FIG. 2A, two rectangular rubber plates 14a and 14b are overlapped to form two side edges. The parts are integrally joined, deformed into a cylindrical shape as shown in FIG. 2B, and fitted to the outer peripheral surface of the solid end outlet 13. The fitting portion has a cylindrical shape, and its tip is always flat and closed as shown by the solid line in FIG. 1, but it is pushed and expanded when the solid material is discharged, and the tip portion is shown by an imaginary line in FIG. Also open cylindrically. As can be seen from FIG. 3, it is a matter of course that the base portion may be formed into a cylindrical shape and the tip portion may be formed into a flat shape from the beginning.

When the solid-liquid suction port 8 is inserted into the liquid supply source 7 and the apparatus of the present invention is driven, the inside of the separate tank 1 and the suction pipe 6 are evacuated by the action of the vacuum pump 3, and The liquid and the earth and sand flow into the first chamber 1a of the separate tank 1, and the gas which has been separated from the liquid and the earth and sand by gravity difference and rises is sucked from the upper part of the separate tank 1 to the suction port 3a of the vacuum pump 3. In addition, the vacuum pump 3 is cooled in the process of being combined with the cooling water sucked from the water suction port 3c and returned to the circulating water tank 4 from the exhaust port 3b, and only the gas separated from the cooling water remains on the water surface. The gas is discharged from the exhaust path 5 to the outside of the circulating water tank 4. During this time, since the check valve mechanism 14 is closed, the vacuum state in the separate tank 1 is maintained, and the check valve mechanism 14 is operated by the pressure difference between the inside and the outside. Is more firm. In the first chamber 1a of the separate tank 1, solid and some liquid remain, and most of the liquid is filtered by the drain screen 2 and flows into the separate chamber 1b.
Is discharged from the discharge port 9b to a predetermined disposal place, and is continuously discharged from the liquid discharge port 10. In addition, the solids are acted upon by the screw feeder 11 together with some liquid,
It is led out from the lower bottom of the first chamber 1a to a predetermined disposal place, and is continuously and automatically discharged from the solid matter discharge port 13 while pushing and expanding the check valve mechanism 14. During this time, the check valve mechanism 14 Even if it is open, the inside of the screw feeder 11 and the solids discharge port
The airtightness of the separate tank 1 is maintained by the solids existing around 13. Therefore, the solid can be discharged without interrupting the suction work from the solid-liquid suction port 8.

[Effects] According to the apparatus of the present invention, the liquid and solid components can be continuously and automatically discharged while the recovery operation of the solid and liquid from the liquid supply source 7 is continued. Can be significantly increased, and as a result of such continuous suction and discharge, there is also a side effect that a separate tank having a small volume is sufficient.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of the mechanism of the device of the present invention. FIG. 2 is a perspective view of a check valve mechanism in the apparatus of the present invention, in which [A] shows a state in which the check valve mechanism is not mounted, and [B] shows a state in which the check valve mechanism is deformed into a cylindrical shape in order to mount the solid discharge port. It shows the state that it was turned on. FIG. 3 is a perspective view showing another embodiment of the check valve mechanism in the device of the present invention. FIG. 4 is an explanatory view of a mechanism of a conventional non-continuous suction / discharge device. 1 Separate tank, 1a 1st room, 1b 1st room,
2 ... Draining screen, 3 ... Vacuum pump, 3a ... Inlet, 6 ... Suction pipe, 8 ... Solid-liquid inlet, 9 ... Submersible pump, 9a ... Suction port, 9b ... Outlet port 10: Liquid outlet, 11: Screw feeder, 13: Solid outlet,
14 ... Check valve mechanism.

Claims (1)

(57) [Claims] A first chamber (1) is provided by a drain screen (2).
a) a separate tank (1) provided with a separate chamber (1b) partitioned from the first chamber, and a suction port (3a) of a vacuum pump (3) communicating with an upper portion in the separate chamber (1b). Room (1
The suction pipe (6) is led out from a), and its leading end is made into a solid-liquid suction port (8), and the suction port (9a) of the submersible pump (9).
Into the separate chamber (1b) and the discharge port (9b) to the outside to form a liquid discharge port (10), and the screw feeder (11) is drawn out from the lower bottom of the first chamber (1a). The leading end is made a solids discharge port (13), and
A continuous suction and discharge device, characterized in that a check valve mechanism (14) is constituted by a flexible tube attached to the solids discharge port (13) and having a flattened tip end.