JP2649147B2 - Sludge suction nozzle device and sludge removal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge suction nozzle device used for removing sludge deposited on the bottom of a sea or lake, and a method for removing sludge using the nozzle device. Here, sludge includes not only general sludge but also soft clayey soil.

[0002]

2. Description of the Related Art For example, when dredging sludge deposited on the bottom of the sea, a river, or an estuary, a club-type dredge, a backhoe-type dredge, or a pump-type dredge is generally used.

[0003]

In the above-mentioned club type dredger and backhoe type dredger, while the bucket containing the sludge is being raised to the surface of the water, the sludge in the sludge mixes with the water and a part of the sludge flows out of the bucket. When the sludge is picked up by the bucket or a light sludge floats up and stays on the seabed without entering the bucket, the sludge cannot be removed efficiently, and the sludge is separated by the operation of the bucket. As a result, the sea is polluted, and there is a risk that the organisms will be adversely affected.

In a pump-type dredger, a sludge and water are sucked together by a pump, and a mixture of the sludge and the mixture is sent to a treatment facility through a transfer pipe, where the sludge is precipitated, and the sludge is transferred together with the sludge. Large amounts of water require large sedimentation facilities.

An object of the present invention is to remove sludge deposited on the seabed or the like without causing the above-mentioned problems.

[0006]

In order to achieve the above object, a sludge suction nozzle device according to the present invention has a flat piston inserted in a vertical cylinder frame, and the lower side of the piston is opened at the lower end. In addition to forming a sludge chamber, a closed cylinder chamber to which an arbitrary amount of water pressure is applied is provided above the piston, and a reciprocating device for moving the piston up and down and a sludge inside the sludge chamber are provided on the top of the frame. It is equipped with a sludge discharge device that sucks and discharges it to other places, and a valve body that is pressed by a spring to automatically discharge water when the water in the closed cylinder chamber reaches a certain pressure or more. A discharge valve shall be provided.

[0007] A filtration frame is provided at the lower end surface of the sludge chamber to prevent solids of a certain size or more from entering the chamber.

Further, a cutting tooth which is operated in a direction transverse to the suction port is provided at a position near the sludge suction port of the sludge discharge device.

Further, there is provided compressed air supply means for supplying compressed air to the inside of the sludge chamber from an opening provided in the piston.

When removing sludge from the seabed or the like, the sludge suction nozzle device described above is fixed to the tip of a mechanical arm protruding from a movable support base, and the sludge sucked by the nozzle device is removed. To the other place through the transfer pipe.

[0011]

The cylinder frame is inserted into the sludge substantially vertically by the operation of the mechanical arm, and the piston is operated upward in connection with this insertion operation. The related operation of the cylinder frame and the piston at this time makes it possible for the sludge to pass through the filtration frame and enter the sludge chamber with the stirring and separation suppressed, and the sludge thus entered is in a stopped state of the piston. Or during the downward displacement of the piston, is sucked by the sludge discharge device and transferred to another place through the transfer pipe.

A suitably arbitrarily large amount of water pressure in the sludge chamber facilitates downward displacement of the piston despite the presence of water pressure acting outside the cylinder frame.

The cutting teeth cut the cords sucked into the suction port, thereby preventing the cords from interfering with the operation of the sludge discharge device.

The compressed air supply means supplies compressed air into the sludge chamber through an opening provided in the piston to fluidize the sludge in the chamber and facilitate discharge by the sludge discharge device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, a support base 1 is placed on a trolley or the like on land and on a barge or the like as shown in FIG.
Is provided, and a mechanical arm 2 operated by hydraulic pressure is protruded from the support table 1.

A sludge suction nozzle device 3 is fixed to the tip of the mechanical arm 2. At this time, the mechanical arm 2 is turned around the longitudinal axis of the support base 1, a hydraulic cylinder device 4,
By the expansion and contraction operation of 5, the nozzle device 3 is brought to an appropriate posture and moved to an arbitrary position.

A sludge stock tank 6 is provided on land or on a barge, and a suction device 7 such as an air pump is provided.
And a power generation device 8 for hydraulic pressure, air pressure, water pressure and the like.

As shown in FIG. 2, the sludge suction nozzle device 3 inserts a flat piston 10 into a vertical cylinder frame 9 and connects the lower side of the piston 10 to a sludge chamber A having an open lower end. At the same time, a reciprocating drive device 11 for vertically operating the piston 10 and a sludge discharge device 12 for sucking and discharging sludge in the sludge chamber A are provided above the piston 10. A filter frame 13 is provided at the lower end surface of A to prevent solid matter having a certain size or more from entering the sludge chamber A.

At this time, a lid member 14 is fixed to the upper end surface of the cylinder frame 9, and a closed cylinder chamber B is provided above the piston 10.

The reciprocating drive device 11 is a hydraulic cylinder device or the like, one end of which is fixed to the cover member 14, and the other end of which is connected to the upper surface of the piston 10.

The sludge discharge device 12 raises a guided pipe 12a having a relatively large diameter from a sled suction port p provided at the center of the piston 10, and places the guided pipe 12a at the center of the lid member 14 in a watertight manner. In addition to fixing the guide ring 12b, which is slidably guided, an inlet shutter valve 16 is provided at the sludge suction port p.

The inlet shutter valve 16 has a shutter 16a which is opened and closed by a cylinder device 15 in a direction transverse to the suction port p, and a string cutting tooth 16b is provided at the tip of the shutter 16a. Make things.

A seal 1 is provided around the piston 10 to keep the piston 10 and the cylinder frame 9 watertight.
7 and a roller 18 for maintaining a gap between the piston 10 and the cylinder frame 9.

Reference numeral 19 denotes a compressed air supply means for supplying compressed air to the inside of the sludge chamber A through an opening p1 provided in the piston 10. Specifically, a sliding pipe 19a is provided to the piston 10. And a guide ring 19b for guiding the sliding tube 19a to the lid member 14 in a water-tight manner and slidably displaceable is fixed.

Reference numeral 20 denotes a water pressure supply port provided in the cover member 14 for supplying an arbitrary amount of water pressure into the cylinder chamber B. Reference numeral 21 denotes a state in which water in the cylinder chamber B reaches a certain pressure or more. This is a discharge valve for automatically draining the water when the valve 21a is pressed by a spring 21b.

Reference numeral 22 denotes a sludge stock tank and a guided pipe 12a.
, 24, and 25 are a hydraulic hose, an air hose, and a hydraulic hose extending from the power generation device 8. k is a cab for operating the mechanical arm 2.

In the case where sludge on the seabed or the like is removed by the above-described apparatus, for example, the following is carried out.

The mechanical arm 2 is operated, and first, as shown in FIG. 3, the tip portion of the nozzle device 3 is brought into a state of landing on the sludge surface s. In this state, each part is in an arbitrary operating state, but according to the illustrated example, the piston 10 has moved to the lowest position, and water of an appropriate pressure is supplied to the cylinder chamber B through the hydraulic hose 25 so that the inside of the chamber B Air is exhaust valve 2
1 and the shutter 16a is closed.

Thereafter, the shutter 16a is opened, and the suction device 7 on the water is operated to apply a vacuum pressure to the guided tube 12a, whereby the soft sludge w below the piston 10 is sucked. Subsequently, the hydraulic cylinder device 11 is shortened to displace the piston 10 upward,
At the same time, the mechanical arm 2 is lowered at the same speed as the displacement speed of the piston 10 to push the cylinder frame 9 into the sludge w.

The sludge w enters the sludge chamber A through the filter frame 13 as shown in FIG. 4, but since the sludge w does not substantially move, the stirring separation is suppressed. The water pressure in the cylinder chamber B is
Due to the upward displacement, the pressure may temporarily exceed a certain level. In this case, the water pressure overcomes the closing force of the discharge valve 21 to open the valve 21 and the water in the chamber B flows out. However, the operation of the piston 10 is not hindered.

At this time, since the water pressure in the cylinder chamber acts on the upper side of the piston, the piston can be displaced downward with a relatively small force irrespective of the existence of the water pressure surrounding the cylinder frame.

When the piston 10 reaches the lowermost position as shown in FIG. 6, the nozzle device 3 is appropriately moved by the mechanical arm 2 while the sludge discharge device 12 is in the suction operation state, and The operation is performed again as shown in FIGS. 4 to 6, and thereafter, such an operation is repeated. As a result, the sludge w on the seabed or the like is not agitated, and is continuously removed in a state where water is little mixed.

During this treatment, the filter frame 13 prevents solid matter having a certain size or more mixed in the sludge w from entering the sludge chamber A, but can prevent the string from entering. Therefore, the string may be entangled in the sludge suction port p of the sludge discharge device 12, and in such a case, the shutter 16a is opened and closed several times during the suction operation of the sludge discharge device 12, thereby The cutting teeth 16b cut the cords. The strings cut in this way do not hinder the continuous operation of the sludge discharge device 12, and the sludge can be continuously removed.

Depending on the properties of the sludge w, the sludge discharge device 12 is operated while the piston 10 is fixed at an appropriate height in the cylinder frame 9, and the cylinder frame 9 is appropriately moved while maintaining this state. It can be carried out.

FIG. 7 is a view showing a modified example of the nozzle device 3, in which only the sludge discharge device 12 is of a reciprocating pump type, unlike the previous device. At this time, 26 is a pump cylinder conforming to the guided pipe 12a,
27 is a pump piston which is reciprocated up and down by a hydraulic cylinder device 28 fixed to the pump cylinder 26, 29
Reference numeral 30 denotes an outlet shutter provided at a lower opening p2 of the pump cylinder 26, which is opened and closed by a cylinder device (not shown). Reference numeral 30 denotes an outlet pipe connected to the lower opening p2, which is fixed to the lid member 14. The guide ring 31 is guided in a watertight state and slidably up and down.
In the figure, the same parts as those described above are denoted by the same reference numerals.

The modified nozzle device 3 is also used in accordance with the previous embodiment, and the operation of the sludge discharge device 12 at this time will be described. With the shutter 16a closed, the other shutter 29 is opened, and the pump piston 27 is displaced upward. This pump cylinder 2
The sludge w in the sludge chamber A is sucked into the pump cylinder 26 through the sludge suction port p by the vacuum pressure generated in the inside 6. When the piston 10 reaches the uppermost position, the shutter 26 is closed, and on the other hand, the shutter 29 is opened,
Subsequently, the piston 10 is displaced downward. The sludge w sucked into the pump cylinder 26 by this causes the outlet opening p
It is extruded through 2 into the outlet pipe 30. The sludge w extruded in this way is transferred to the sludge stock tank 6 above the water through the transfer pipe 22 by the same subsequent pushing action.
Transferred to It is not necessary to operate the suction device 7 at this time.

In the above embodiment, the water surrounding the cylinder frame 9 is allowed to freely flow into or out of the cylinder chamber B from the water supply port 20 without connecting the water pressure hose 25 to the water pressure supply port 20. No problem. However, in this case, the piston 10 is not positively displaced downward by the water pressure in the cylinder chamber B.

[0038]

According to the present invention constructed as described above, sludge deposited on the sea floor or the like is located in the sludge chamber of the cylinder frame without being separated by stirring, and is sucked and removed in the sludge chamber. Water pollution in the surrounding sea area and the like due to sludge removal can be suppressed, and unnecessary water can be prevented from being sucked during suction of sludge, so that efficient removal work can be performed.

According to the first aspect, since the water pressure in the cylinder chamber acts on the upper side of the piston, the piston can be displaced downward with a relatively small force despite the existence of the water pressure surrounding the cylinder frame. You can do it.

According to the second aspect of the present invention, the cords that have passed through the filter frame and reached the sludge suction port are cut without needing to lift the cylinder frame onto the water, and efficient work can be performed. It will be.

According to the third aspect, the fluidity of the sludge in the sludge chamber is increased by the compressed air to facilitate suction by the sludge discharge device.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a sludge removing operation according to the present invention.

FIG. 2 is a cross-sectional view of a sludge suction nozzle device used for the sludge removing operation.

FIG. 3 is a diagram showing one use state of the nozzle device.

FIG. 4 is a diagram showing one use state of the nozzle device.

FIG. 5 is a diagram showing one use state of the nozzle device.

FIG. 6 is a diagram showing one use state of the nozzle device.

FIG. 7 is a sectional view showing a modified example of the nozzle device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support stand 2 Mechanical arm 9 Cylinder frame 10 Piston 11 Reciprocating drive device 12 Sludge discharge device 13 Filtration frame 16a Cutting teeth 19 Compressed air supply means 22 Transfer pipe A Sludge chamber B Cylinder chamber P Sludge suction port p1 Opening

Claims (4)

(57) [Claims] 1. A flat piston is inserted into a vertical cylinder frame, the lower side of the piston is formed as a sludge chamber having an open lower end surface, and an arbitrary amount of water pressure is applied to the upper side of the piston. In addition to providing a closed cylinder chamber, a reciprocating device for moving the piston up and down on the upper surface of the frame, a sludge discharge device that sucks sludge in the sludge chamber and discharges it to other places, and a sludge discharge device in the closed cylinder chamber A drain valve equipped with a valve pressed by a spring to automatically drain the water when the water reaches a certain pressure or more is provided. A sludge suction nozzle device provided with a filtration frame for preventing solid matter from entering. 2. The nozzle device for sludge suction according to claim 1, wherein cutting teeth which are operated in a direction crossing the suction hole are provided at a position near the sludge suction port of the sludge discharge device. 3. The nozzle device for sludge suction according to claim 1, further comprising compressed air supply means for supplying compressed air into the sludge chamber from an opening provided in the piston. 4. The sludge suction nozzle device according to claim 1 is fixed to a tip of a mechanical arm protruding from a movable support table, and the sludge sucked by the nozzle device is transferred to another location through a transfer pipe. A sludge removal method characterized by eliminating.