JPH0421017B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sludge pumping device, and more particularly to a sludge pumping device that can continuously store and pump dredged mud that has been sorted and crushed into a ready-mixed concrete-like fluid. .

In recent years, the amount of mud deposited on the bottoms of ports, canals, urban rivers, reservoirs, etc. has become extremely large, and if left untreated, it can cause pollution such as bad odors and disasters such as floods. It is requested that the mud be dredged as soon as possible.

Therefore, in order to speed up the dredging work, the current situation is to increase the size of excavators for dredging mud and also to increase the size of barges for transporting mud (hereinafter simply referred to as barges).

However, the working water surface that can be dredged using such large barges is limited to ports, canals, etc. where the barges etc. can be towed directly from their moorings, and inland reservoirs etc. Since barges cannot be towed away from their moorings, the larger the barge, the more inconvenient it becomes.

Further, in the dredging method in which mud is transported by barges, a large number of barges are required to ensure that the dredging work is not interrupted, and furthermore, the mud needs to be unloaded.

Therefore, in order to satisfy these demands, the present inventor developed a sludge system in which various devices for selectively crushing dredged mud into a ready-mixed concrete-like fluid and pumping it to land are placed on a block-connected barge. Dredging equipment was proposed first.

In other words, the dredged mud contains lumps and has a certain degree of viscosity (hereinafter collectively referred to as piled mud), so if it is sent as is into the mud pipe, it may cause pipe clogging. Therefore, the lumps in the accumulated mud are first removed using a sorter, and then the sorted accumulated mud is crushed using a crusher to form a ready-mixed concrete-like fluid (hereinafter collectively referred to as fluid mud). This is continuously sent to a mud pumping tank device, and the fluidized mud stored in the tank device is continuously pumped to land etc. via the mud pipe of the tank device using compressed air.

Figure 1 shows a mud pumping tank device for such dredging equipment. 1 has an opening 2 at the top of the body, and a first air cylinder 3 in the body below the opening 2.
A second tank 1' having a structure similar to that of the first tank 1 is shown as a first retention tank (hereinafter referred to as a tank) equipped with a lid body 4 connected to the first tank 1. It is placed on a barge (not shown) in parallel with the above. Reference numeral 5 designates a mud supply switching means in which a first guide pipe 7 and a second guide pipe 8 are attached to the lower end of the mud receiving hopper section 6 in a fork-like manner. Fluidized mud is supplied from a belt conveyor (not shown). The first guide pipe 7 is connected to the first tank 1
The second guide pipe 8 is further connected to the opening 2' of the second tank 1'. Reference numeral 9 denotes a damper swingably attached to the forked portion of the mud supply switching means 5. and a position where the guide tube 8 is closed. Here, when the damper 9 is rotated to the position where it closes the second guide pipe 8 as shown in FIG.
The water is stored in the first tank 1 through the When a predetermined amount of fluidized mud is stored in the first tank 1, the lid 4 of the first tank 1 closes the opening 2 by the first air cylinder 3. Then, the damper 9 is rotated to the position where it closes the first guide pipe 7, and the fluidized mud from the hopper part 6 is transferred to the second guide pipe 8.
The water is stored in the second tank 1' through the tank 1'. Also,
While the mud is being supplied to the second tank 1', compressed air is supplied to the first tank 1, and the fluidized mud in the first tank 1 is transported to land or other locations through a mud pipe (not shown). It is now being sent to

By the way, in such a mud pressure-feeding tank device, the fluidized mud supplied to each tank is switched to one of the forked pipes by the damper switching operation of the mud supply switching means, and is transferred to the first tank and the second tank.
Because mud was supplied to either side of the tank by a simple gravity drop method through guide pipes installed at an angle, the flow slowed down and tended to be unable to adequately cope with the increase in fluidized mud supplied to the hopper.

The present invention has been made in view of the above points, and the present invention has been made in such a manner that a large amount of fluidized mud, which is introduced into a mud receiving hopper section by a mud transporting means, is alternately and forcefully and rapidly transferred to two mud storage/mud pumping tanks. It is an object of the present invention to provide a mud pumping tank device equipped with a mud feeding device that can supply mud.

The gist of the present invention to achieve such an object is to have a receiving connecting pipe having an on-off valve and a discharge pipe connected to a common mud feeding pipe at the top and bottom of the tank, respectively, and , Two mud pumping tanks each having a compressed air pipe for discharging and pumping the fluid mud stored in the tank are installed side by side on a barge, and the storage and discharge of mud are carried out by two mud pumping tanks. In a mud pumping tank device in which tanks are alternately connected to each other, the mud pumping tank is placed horizontally across the top of the two mud pumping tanks, and is connected to the fluidized mud receiving hopper section at the center, and connected to each tank at both ends. A screw conveyor includes a cylindrical casing with both ends closed and connected to the connecting pipe at the top, a rotating shaft having a spiral fin disposed inside the casing along the axial direction, and the screw conveyor can be rotated in forward and reverse directions. This mud pumping tank device is characterized in that it is equipped with an alternate mud supply device to two tanks, which is composed of a drive motor that rotates in a direction.

The present invention will be described below based on embodiments shown in the drawings.

FIG. 2 shows a plan view of the entire sludge dredging equipment equipped with the mud pumping tank device according to the present invention.

In the figure, reference numeral 20 indicates a block-connected barge in which five cavity-type floating small blocks (hereinafter referred to as small blocks) 21 are fixedly connected in parallel. Pillar (hereinafter referred to as spat)
The lower tip of barge 22 is stuck into the bottom of the water, and barge 20
This is to keep the barge stationary in a predetermined position and prevent the barge from being blown away by wind, water currents, etc.

The left side of the barge 20 in the figure is the bow side, and a backhoe 23 for dredging mud is placed on the bow side, and a screen-type screen for roughly sorting the dredged mud is placed on the front port side of the barge 20. Sorting machine 24
are placed. Also, on the port side of the stern of the barge 20, there is a trommel-type crusher 25 that crushes the accumulated mud sorted by the sorter 24 into fluid mud.
In addition, on the stern starboard side of the barge 20,
A mud pumping tank device 27 is arranged to accumulate fluidized mud from the crusher 25 and forcefully transport it to land through a mud pipe 26. In this way, the crusher 25 is placed on the opposite side from the backhoe 23, which is a heavy object.
By arranging the pulverizer 25 and the mud pumping tank device 27, the barge 20 can be balanced in the front and rear direction.
They are placed on the port and starboard sides of the barge 20 to maintain the left and right balance of the barge 20. 28 is a first belt conveyor that conveys the accumulated mud from the sorter 24 to the crusher 25, and 29 is a second belt conveyor that conveys the fluidized mud from the crusher 25 to the mud pumping tank device 27. ing. 30 is the crusher 25;
An air tank 30a and a generator 30 are used to generate electric power, compressed air, etc. to be supplied to the first and second belt conveyors 28, 29, mud pumping tank device 27, etc.
b shows a power unit consisting of a compressor 30c, which is disposed in the center of the barge 1. Here, the sorting machine 24,
crusher 25, first and second belt conveyors 28,
29 constitutes a mud sorting and crushing unit.

Note that the arrangement of the dredging excavator, mud sorting powder unit, mud pumping tank device, power unit, etc. is not limited to this example, and may be arranged as appropriate in consideration of usability, barge stability, etc. . Here, the stability of the barge refers to the balance between the front and rear, left and right sides of the barge, and it is preferable that the barge be maintained in a horizontal state, and when the excavator excavates mud on the water bottom within its movement range. It is desirable that the barge has almost no inclination.

Next, the mud pumping tank device according to the present invention was installed in a third tank.
This will be explained in detail based on the embodiment shown in FIGS.

31 indicates a cylindrical first tank for storing and pressurizing fluidized mud, and a second tank 32 having the same structure as the first tank 31 is installed on the barge 1 in parallel with the first tank 31. It is located in In the following explanation of the tanks, only the first tank 31 will be described, and the explanation of the second tank 32 will be omitted.

Reference numeral 33 indicates a first connecting pipe fixed to the top of the tank body, and one end side of a first electric valve 34 is connected to this first connecting pipe 33. 35 indicates a first rubber sleeve for vibration absorption connected to the other end side of the first electric valve 34, and at the upper end of this first rubber sleeve 35 is a first guide pipe of a hopper to be described later. It is connected. Reference numeral 36 indicates a stirring shaft rotatably mounted in the lower part of the tank along the axial direction.A stirring plate (not shown) is attached to this stirring shaft 36, and a timing chain is controlled by a motor 37 provided outside the tank. 38, and prevents the fluidized mud stored in the tank from being deposited on the inner bottom of the tank. Reference numeral 39 indicates an air supply pipe that supplies compressed air into the tank, and this air supply pipe 39 is attached to the front end side of the top of the tank. Reference numeral 40 indicates a first discharge pipe for discharging the fluidized mud in the tank. The mud pipe 26
It is connected to the. 42 is a first upper limit detector that detects the upper limit of fluidized mud stored in the tank;
Reference numeral 3 indicates a first lower limit detector for detecting the lower limit of the fluidized mud stored in the tank, and 44 indicates a slump detector.

45 is a cylindrical casing 4 with both ends closed.
6 shows a horizontal screw conveyor in which a rotary shaft 48 having a spiral fin 47 is rotatably attached along its axial direction, and first guide pipes are provided at the bottoms of both sides of the circumferential wall of the casing 46, respectively. 49
and a second guide pipe 50 are attached perpendicularly to the axis of the casing 46, and a mud receiving hopper section 51 is attached to the central top of the peripheral wall of the casing 46, and these screw conveyor 45, first guide tube 49, The second guide pipe 50 and the hopper portion 51 form a mud supply device. The first guide tube 49 is connected to a first rubber sleeve 35 attached to the first tank 31,
The second guide tube 50 is connected to a second rubber sleeve 35' attached to the second tank 32. In addition, the mud receiving hopper section 51
An upper end portion of the second belt conveyor 29 is disposed above.

Reference numeral 52 denotes a drive motor capable of rotating in forward and reverse directions, and this drive motor 52 is connected to the rotating shaft 48 of the screw conveyor 45 through a chain 53, and is configured to rotate the rotating shaft 48 in forward and reverse directions. , and when the rotating shaft 48 rotates in the forward direction,
From the mud receiving hopper section 51 to the screw conveyor 4
The fluidized mud introduced into the tube 5 is conveyed toward the second guide tube 50 by the spiral fins 47, and when reversely rotated, the fluidized mud is conveyed toward the first guide tube 49.

The structure of this embodiment has been described above, and its operation will be explained next.

When the first tank 31 is empty, the first electric valve 34 is opened in response to a signal from the first lower limit detector 43, the first remote control valve 41 is closed, and the screw conveyor 45 rotation axis 4
8 rotates in the opposite direction, and the fluidized mud transported by the second belt conveyor 29 and thrown into the mud receiving hopper section 51 is forcibly transferred toward the first guide pipe 49 by the spiral fins 47. Ru. The fluidized mud flows through the first guide pipe 49 and the first rubber sleeve 3.
5. Tank 31 vertically through first electric valve 34
Feeds falling within.

When the fluidized mud stored in the first tank 31 reaches a predetermined amount, the first upper limit detector 42 is activated, the first electric valve 34 is closed, and the first remote control valve 41 is activated. When opened, compressed air is supplied from the first air supply pipe 39 into the first tank 31, and the fluidized mud flows through the first discharge pipe 40 and the first remote control valve 4.
1 and the mud pipe 26 to land, etc.
Further, when the first upper limit detector 42 is activated, the drive motor 52 of the screw conveyor 45 rotates in the forward direction, and the second electric valve 34' is opened and the second remote control valve 41' is closed. Then, the fluidized mud supplied to the hopper section 51 is transferred by the spiral fins 47 toward the second guide pipe 50, and is supplied falling into the second tank 32. From then on, this operation is performed alternately, resulting in continuous storage and continuous pressure of fluidized mud.

As described above, according to this embodiment, the fluidized mud supplied to the mud receiving hopper is forcibly transferred to one of the tanks by the screw conveyor. The effect is that the amount of fluidized mud that can be processed can be significantly increased.

In this example, the rubber sleeve placed between the mud supply device and the tank is designed to prevent vibrations generated by the screw conveyor from being applied to the electric valve, etc.; however, this is not limited to this. Instead, the guide pipe of the mud supply device and the electric valve may be directly connected.

As described above, the present invention has the excellent effect of significantly increasing the amount of fluidized mud treated, and its usability is great.

[Brief explanation of drawings]

Figure 1 is a front view of a conventional mud pumping tank device.
FIG. 2 is a plan view of the dredging equipment according to this embodiment, and FIG. 3 is a side view of the mud pumping tank device according to this embodiment.
4 is a plan view of FIG. 3, and FIG. 5 is a front view showing the main parts of FIG. 3. 21... Barge, 21... Rigid floating small block,
22...spat, 23...back, 24...
...Sorting machine, 25...Crusher, 26...Sludge feeding pipe, 2
7... Mud pressure feeding tank device, 28... First belt conveyor, 29... Second belt conveyor, 3
0...Power unit, 30a...Air tank,
30c... Generator, 30c... Compressor, 3
1...First tank, 32...Second tank, 3
3...first connecting pipe, 34...first electric valve, 3
5... First rubber sleeve, 36... Stirring shaft,
37...Motor, 38...Timing chain,
39...Air supply pipe, 40...First discharge pipe, 41...
...first remote control valve, 42...first upper limit detector, 43...first lower limit detector, 44...slump detector, 45...screw conveyor, 46...
... Casing, 47 ... Spiral fin, 48 ... Rotating shaft, 49 ... First guide pipe, 50 ... Second guide pipe, 51 ... Mud receiving hopper section, 52 ... Drive motor, 53 ... Chain.

Claims (1)

[Scope of Claims] 1. The tank has a receiving connecting pipe each having an on-off valve and a discharge pipe connected to a common mud feeding pipe at the top and bottom of the tank, and discharges and pressure-feeds the fluidized mud stored in the tank. A mud pumping tank in which two mud pumping tanks each having a compressed air supply pipe are installed side by side on a barge, and mud storage and discharge pumping are performed alternately to the two mud pumping tanks. In the device, a double-end closed circle is placed horizontally across the tops of the two mud pumping tanks, is connected to the fluid mud receiving hopper at the center, and is connected at both ends to the connecting pipe at the top of each tank. a columnar casing;
A screw conveyor comprising a rotating shaft having spiral fins disposed inside the casing along its axial direction, and a drive motor for rotating the screw conveyor in forward and reverse directions. A mud pressure feeding tank device characterized by being equipped with an alternate mud supply device.