JP3589764B2 - Slime discharge system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a slime discharge system for discharging muddy water and the like from a construction site to various types of underground construction and the like to a high place above ground.
[0002]
[Prior art]
Conventionally, wastewater containing muddy water, earth and sand, gravel and gravel to be directly discharged by vacuum equipment and booster pumps from underground work sites to high places through shafts (hereinafter, these wastewaters are called slime) When sucking up slime containing sediment, gravel, and gravel, if the height exceeds the degree of vacuum, the liquid fills the inside of the vertical pipe, and it is difficult to further suck and discharge the slime. In addition, the rising height of the water using the vacuum action is about 10 m in principle, but in practice there are various losses and the limit is about 6 m. For this reason, a machine body such as a suction tank and a pump may be installed underground and discharged to the site.In this case, it is possible to pump water using a pump. Gradually accumulate on the site and the treatment becomes difficult. Even when the water is discharged to the ground by a pump, the flow rate in the horizontal pipe is reduced due to the intermittent operation and insufficient water volume, sedimentation occurs, and eventually the pipe is clogged.
A vacuum device in which a suction tank, a discharge pump, a vacuum pump, and the like are integrated is often used in the art. However, this device has a volume of 2 to 4 m ³ and a weight of 1 to ³ depending on the performance. In terms of equipment, it was often difficult to install and operate a vacuum device or the like on a narrow underground construction site.
[0003]
[Problems to be solved by the invention]
Therefore, it is necessary to discharge the slime generated at the work site along with such sewerage, subway, shield work of the common ditch, etc. Suitable for collecting and discharging spring water generated during construction, wastewater generated during segment cleaning, and slime generated during various grouting works to the ground, and underground pits for electricity, steelmaking, shipbuilding, and petroleum as general industries. The system of the present invention is also effective for cleaning, slim recovery at the bottom of a ship, cleaning pond / river, etc., when moving to a high place where discharge is difficult by a submersible pump.
[0004]
That is, an object of the present invention is to provide a slime discharging system capable of transferring and discharging slime to a higher place than the suction capacity by vacuum pressure. The purpose is to enable solids in the slime to be treated to be separated and collected, and to prevent blockage of the horizontal pipe at high places (aboveground).
Furthermore, by installing a large and heavy vacuum device at a high place (aboveground part), the underground space can be effectively used.
Furthermore, for other purposes, care must be taken not to cause blockage of piping etc. even during long-time continuous operation, and maintenance and management are easy, and installation is possible in a narrow construction site without taking up space. It is to make the system possible.
[0005]
[Means for Solving the Problems]
The gist of the present invention is to provide a hatch tank installed on the slime generation site side for separating coarse particles in the slime, at least one pump unit capable of gas-liquid separation, a vacuum pump and a drainage pump. The exhaust port of the hatch tank and the suction port of the pump unit are connected by piping, and the drainage pipe and the ventilation pipe separated and sent upward in the pump unit are combined into one horizontal pipe. A slime discharge system characterized by suction and drainage.
In the present invention, a vacuum device having a built-in vacuum pump, drainage pump, suction tank, etc., which is heavy and bulky, is installed at an elevated place which is easy to install and easy to handle, and which is away from an underground work site through a ground or a shaft. This is characterized in that the operation is made more efficient, and a pump unit capable of gas-liquid separation is interposed in order to send the slime to a high place, thereby enabling continuous operation without clogging.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a basic configuration of the present invention. The slime discharge system of the present invention includes a hatch tank 1 installed near an underground site for separating coarse particles in a slime, at least one pump unit 2 capable of gas-liquid separation, and a higher position than the pump unit. , Which connects the discharge port of the hatch tank and the suction port of the pump unit by piping, and the pumping pipe 4 and the ventilation pipe 5 which are separated in the pump unit 2 and sent upward. Are collected into one horizontal pipe 6 and sucked and drained by the vacuum device 3. Further, when it is desired to lift the slime to a high place, the pump unit 2 is added in the middle as shown in FIG. 2, and the pump units 2-1, 2-2 and 2-3 are added in accordance with the height. The slime can be discharged by disposing.
[0007]
Next, each component of the system of the present invention will be described. The hatch tank should be installed on the underground site side, as long as it can separate coarse particles in the slime, and it is possible to use various types of tanks equipped with a filter that separates coarse particles as is well known. it can.
More specifically, referring to the detailed explanatory view of the hatch tank shown in FIG. 3, for example, as shown in the cross-sectional view of FIG. 3A and the front view of FIG. Hatch 8, a suction port 9 on one end and a discharge port 10 on the other side, and a strainer using a metal wire mesh, lattice, punching metal or the like is provided in front of the discharge port inside the container. Hatch tank.
[0008]
When the slime flows into the container from the suction port 9 of the cylindrical container 7, the container is almost filled with water (liquid) except for a space through which air or the like passes at the top. Therefore, the sucked solid has a large resistance due to the slime or the like sucked first, and the speed is reduced to a large extent, and the solid precipitates, and a relatively small solid finally strikes the strainer 11 and is separated. The cleaning hatch 8 provided on the side surface of the cylindrical container is for taking out deposits such as coarse particles in the slime that has been sucked into and separated from the container.
[0009]
The discharge port 10 of the hatch tank is connected to the suction port 15 of the pump unit 2 and operates to discharge the slime to the outside. In actual handling, as shown in FIG. 3, if the metal band 12 or the like is wound around the hatch tank and fixed to the pedestal 13, the apparatus is stable and handling is easy. Furthermore, if a hinge or the like for attaching a hanging bracket is provided on the outside of the cylindrical container, it can be installed so as to be suspended from a structure such as a side wall or a frame at a work site, so that it can be operated without taking up space. be able to.
[0010]
Next, the pump unit will be described. FIG. 4A is an explanatory view showing a cross section of the pump unit, and FIG. 4B is a view of the pump unit as viewed from above.
The pump unit only needs to be able to separate the slime and gas to be discharged. As shown in FIG. 4, a vertical cylindrical container 7 contains an underwater sand pump 14, and a suction port for slime or the like is provided on the side of the container. A liquid discharge port 16 connected to the underwater sand pump and a gas discharge port 17 connected to an external vacuum device are provided in the upper lid 18. The liquid discharge port 16 is connected to the pumping pipe 4 and the gas discharge port 17 is connected to the ventilation pipe 5. Further, in order to facilitate maintenance and management, it is desirable to provide a cleaning opening on the side surface of the vertical cylindrical container of the pump unit.
[0011]
The pump unit is basically a pump unit in which a submersible sand pump 14 is directly stored in a cylindrical container 7 similar to a sand pump as shown in FIG. With such a structure, the size of the cylindrical container 7 can be made slightly larger than that of the submersible sand pump 14, and the material of the cylindrical container can be minimized. This is because the whole can be made compact and lightweight. In an actual operating state of the pump unit, the inside of the container is depressurized. Therefore, in order to maintain strength and facilitate handling, the container is desirably a cylindrical shape.
[0012]
As the underwater sand pump, a commercially available underwater sand pump can be used as long as it has a function of discharging the slime sucked into the container to the outside through the liquid outlet 16 provided in the upper lid 18 and the water pump 4. Can also be. The underwater sand pump is desirably provided with a strainer that can prevent entrainment of coarse particles underneath and a stirring blade 19 at the tip of the shaft of the pump to prevent slime from settling. When the slime flows into the container from the suction port 15 provided above the cylindrical container 7, the slime flows from the tangential direction of the container, and due to the action of the liquid cyclone, relatively large and heavy particles are removed from the container. Most of the water is settled at the bottom, but most of the water is discharged from the liquid discharge port connected to the underwater sand pump toward a high place by the operation of the underwater sand pump.
[0013]
Air and the like flowing into the container mixed with the slime are discharged through the gas discharge port 17 and the ventilation pipe 5 connected to an external vacuum device. If solid particles are mixed in the gas discharged from the gas outlet 17, an external vacuum device (not shown) may be hindered. Therefore, a wire mesh or the like is formed in front of the gas outlet 17 as shown in the figure. It is better to install a strainer 11.
If the pump unit is also used for a long time, particles of a certain size accumulate on the bottom of the cylindrical container 7 with the passage of time. It is preferable to observe the situation and open the cleaning opening at an appropriate interval to take out the deposit, that is, the waste. In addition, as will be described later, the upper lid 18 can be detached, and the upper lid 18 and the underwater sand pump can be removed together for cleaning.
[0014]
The feature of the present invention is that by operating an external vacuum device and continuously extracting gas from the gas discharge port 17 provided in the upper lid 18 of the sealed cylindrical container 7 through the ventilation pipe 5, The slime and the like can be continuously sucked from the suction port 15 by utilizing the reduced pressure in the cylindrical container 7. Thereby, gas-liquid separation is performed in the cylindrical container 7, and slime or the like can be continuously discharged by the underwater sand pump housed in the container, so that the entire apparatus is made lightweight and compact.
[0015]
The upper cover 18 provided with the liquid discharge port 16 and the gas discharge port 17 is desirably bolted to the upper portion of the cylindrical container 7 at regular intervals as shown in FIG. This is because it is easy to change the mounting direction by changing the position of the bolt according to the situation of the use site, in addition to using the suction port 15 provided at the left and right target positions and closing one of the suction ports. It has been considered so that it can be performed. Further, by attaching the underwater sand pump 14 to the upper cover 18 with bolts or the like, the bolts can be removed and the underwater sand pump can be pulled up together with the upper cover even when the cylindrical container 7 is installed. Can be easily performed.
[0016]
As shown in FIG. 5, the vacuum device 3 includes a suction tank 22 having a built-in drain pump 21 as a main component inside a device cover 20, a vacuum pump 23, and their accessories. I have. The slime sucked together with the air from the suction port 9 of the suction tank 22 by the suction action of the vacuum pump 23 undergoes gas-liquid separation in the suction tank. The air enters the vacuum pump 23, and the slime is discharged out of the system by the drainage pump 21. Is discharged. In the present invention, the pumping pipe 4 and the ventilation pipe 5 that are separated and sent upward in the pump unit 2 are combined into one horizontal pipe 6 so as to be sucked and drained by the vacuum device 3. Blockage trouble due to sedimentation of pipes in the pneumatic transportation horizontal part can be avoided.
[0017]
【Example】
The slime discharge system shown in FIG. 1 was constructed in the following manner.
As the hatch tank, an iron cylindrical container 7 having a size of 90 cm × 90 cm × 200 cm and an inner volume of 720 l was prepared, and a suction port 9 was provided on one end face and a discharge port 10 having a diameter of 10 cm was provided on the other end face. In addition, an inspection window was provided at the top of the side of the container.
As for the size of the cylindrical container 7, the larger the capacity, the longer the interval for taking out the sediment (sludge) accumulated in the hatch tank, but the larger the size, the more difficult it is to convey, and a large space is required for installation. Therefore, the above dimensions may be appropriately changed in consideration of the situation and purpose of the work site.
The side surface of the cylindrical container 7 is provided with a cleaning hatch 8 having an opening of 70 cm × 100 cm, an upper portion of the cleaning hatch is fixed with a hinge, and a lower side is made openable, and a structure capable of being closed in an operating state. did. A strainer 11 made of a stainless steel punched metal having a circular hole with a diameter of 3 cm was attached to the inside of the container just before the outlet.
[0018]
The above-mentioned hatch tank was attached to a hinge provided above and outside of the cylindrical container 7 near a work site underground for sewerage work, and a hanging bracket was attached thereto. installed. A slime generated from the work site in a state where the hatch tank is connected to a vacuum device having a structure as shown in FIG. When the water is sucked and discharged, the work to remove the sediment (sludge) from the hatch tank is performed about once a week, large particles remain in the tank, and the wastewater containing muddy water, sediment, and gravels reach the surface. It was discharged smoothly. During this time, the strainer was continuously operated without clogging. At another work site, two pump units 2-1 and 2-2 are installed at an interval of about 10 m in the height direction as shown in FIG. -3 and a vacuum device having a structure as shown in FIG. 5 were installed to continuously discharge the slime. Except for discharging large particles once every several days in the same manner as above, slime was successfully discharged from the site.
[0019]
【The invention's effect】
As described above, the slime according to the present invention separates large solids in the slime to be treated as described above, and removes mixed gas, liquid, small-sized earth and sand, etc. from the discharge port together with water. And can contribute to improving the efficiency of on-site work. In addition, even during long-time continuous operation, there is no clogging, there is no need for maintenance and management, and the work site can be effectively used because it can be installed in a small construction site without taking up space. In addition, it is extremely useful for consolidation in narrow construction sites, which contributes to safe work on the site.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a basic configuration of the present invention,
FIG. 2 is an explanatory view showing a configuration in which the slime is further lifted to a higher place in the apparatus according to the present invention;
FIG. 3 is a detailed explanatory view of a hatch tank,
FIG. 4 is a view showing a structure of a pump unit;
FIG. 5 is an explanatory diagram showing an overall configuration of a vacuum device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hatch tank 2, 2-1 2-2, 2-3 Pump unit 3 Vacuum device 4 Pumping pipe 5 Ventilation pipe 6 Horizontal pipe 7 Cylindrical container 8 Cleaning hatch 9 Suction port 10 Discharge port 11 Strainer 12 Metal band 13 Pedestal 14 Submersible sand pump 15 Suction port 16 Liquid discharge port 17 Gas discharge port 18 Top lid 19 Stirrer blade 20 Device cover 21 Drain pump 22 Suction tank 23 Vacuum pump

Claims (1)

A hatch tank installed on the slime generation site side for separating coarse particles in the slime, and a vacuum device provided with at least one pump unit capable of gas-liquid separation and a vacuum pump and a drainage pump. A slime characterized by connecting a discharge port and a suction port of a pump unit with a pipe, and collectively sucking and draining a drain pipe and a vent pipe separated and sent upward in the pump unit into one horizontal pipe. Discharge system.

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