JPH06330899A - Pneumatic slurry conveyor - Google Patents

Abstract

PURPOSE:To make even such one as highly dense slurry efficiently conveyable without entailing any jamming trouble and even in the case where there is a mixture of solid matter such as pebbles, lumber, wood chips and the like, without leaving it behind. CONSTITUTION:This conveyor system is provided with a casing 1 through which a slurry suction passage 1a being free of opening or closing and a slurry discharge passage 1b being free of owning or closing likewise are connected to each other, while an air exhaust passage 23 for exhausting internal air and a pneumatic inflow passage 21 for making compressed air be inflow are connected together. In addition, it is composed of an ejector 4 evacuating an inner part of the casing 1 by means of air bleeding out of the air exhaust passage 23 and making slurry flow in and a compressor 2 feeding the compressed air into the casing 1 by the pneumatic inflow passage 21 and pressure feeding the charged slurry.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier device for efficiently transporting highly concentrated mud water such as cement-based mud water, sludge, mud water mixed with clay.

[0002]

2. Description of the Related Art Conventionally, for example, in the case of soil improvement work by high-pressure injection injection method, or sludge treatment that occurs in the construction of underground continuous walls, water stop walls, etc., a pit that simply stores sludge on site. If you can provide
After putting it in this pit for about 24 hours and solidifying it,
Although it is possible to use an excavator such as a hydraulic excavator to transport the dump truck to a predetermined disposal location and dispose of it, it is not possible to secure sufficient pit land at most construction sites. So that the injection rod 5
A sludge pit 51 like a dug was formed on the ground portion of No. 0, and a sand pump 51 was installed in this and mounted on a tank car 53 by suction, and transported to a designated disposal site for disposal. The muddy water may be transported by a vacuum wheel 55 as shown in FIG.

[0003]

However, the cement or bentonite-based sludge generated from the ground improvement work contains a large amount of cement and has a relatively high specific gravity due to the inclusion of fine soil particles. ,
Further, since solid matters such as pebbles, lumber and wood chips are mixed depending on the ground, there is a problem that the sand pump, the vacuum pump, etc. cannot efficiently suck up as described above. For this reason, a monitoring staff or a worker is always required to deal with the occurrence of clogging and to discharge the residue remaining at the bottom of the pit without being transported.
It was troublesome in terms of work.

Therefore, the main problem of the present invention is to eliminate the above-mentioned problems, to efficiently convey even high-concentration mud water without clogging failure, and when solid matters such as pebbles, lumber and wood chips are mixed. However, it is intended to provide a muddy water transport device capable of transporting all of this.

[0005]

Means for Solving the Problems The above-mentioned problems are connected to a mud water suction passage whose opening / closing can be controlled and a mud discharge passage whose opening / closing can be controlled, and an air discharge passage for discharging internal air and a compressed air inflow. A hollow airtight container connected to the air inflow passage for making the inside of the hollow airtight container vacuum by extracting air from the air exhaust passage, for filling muddy water into the hollow airtight container from the muddy water suction passage. It can be solved by comprising a vacuum generator and a compressed air generating means for supplying compressed air into the hollow closed container from the air inflow path and for feeding the filled muddy water under pressure from the muddy water discharge path.

Further, preferably, a vacuum tank is separately provided,
The vacuum tank is connected to the middle of the air discharge path, and an opening / closing control valve is provided at least on the hollow closed container side from this connection point, and the vacuum tank is vacuumed in advance before filling the hollow closed container with muddy water. Therefore, the muddy water is filled by opening / closing the opening / closing control valve.

In this case, the vacuum generating device is an ejector that uses compressed air from the compressed air generating means to evacuate the inside of the hollow closed container, and forms an open / close controllable external communication path connected to the hollow closed container. It is desirable that level switches be provided at the upper portion and the lower portion of the hollow closed container.

In addition, a spiral member having an outline dimension that is in contact with or close to the inner wall surface of the passage is internally provided in the muddy water suction passage, and the spiral member is rotated around the axis of the muddy water suction passage by the rotation driving means. It is desirable to provide a screw feeder type mud collecting device that is rotatable and that has a spiral screw blade that is bilaterally symmetrical with respect to a horizontally placed rotary drive shaft, on the outer side of the suction port of the muddy water suction path.

[0009]

In the present invention, since the inside of the hollow closed container is evacuated and mud is introduced, even mud having a high suction effect and a high concentration can be easily transported. Further, even if solid matters such as pebbles, lumber, and wood chips are mixed, since they are transported together with the muddy water, clogging does not occur. Further, by providing the vacuum tank, when filling the hollow closed container with muddy water, by opening the open / close control valve,
Since muddy water can be made to flow in at a stretch, the transfer efficiency can be dramatically improved by shortening the suction time.

Further, by using the ejector as the vacuum generating device, the working source can be shared with the compressed air generating means such as the compressor, and the whole device becomes compact, and the external communication passage is provided to reduce the pressure or It is possible to instantly return the inside of the hollow closed container in a high pressure state to the atmospheric pressure, and to shorten the operating time. Further, by providing the level switches at the upper part and the lower part of the hollow closed container, excessive suction / excessive discharge is eliminated and waste of operation is eliminated.

In addition, a spiral member having an outline dimension so as to come into contact with or close to the inner wall surface of the passage is internally provided in the muddy water suction passage, and the spiral member is rotated around the axis of the suction passage by a rotation driving means. By making it rotatable, the spiral member cuts off the adhesion between the inner wall surface of the suction passage and the muddy water even if the muddy water has a high concentration, and the muddy water can be easily sucked.

Further, a screw feeder type mud collecting device having screw blades which are symmetrical with respect to a horizontally placed rotary drive shaft is provided on the outer side of the suction port of the muddy water suction passage, so that high concentration mud water mixed with solid matter can be collected. It can be collected from both sides and easily guided to the suction port.

[0013]

EXAMPLES The present invention will be described in detail below based on examples.
In FIG. 1, a casing 1 which is a hollow closed container is provided with a muddy water suction passage 1a which communicates with a muddy water storage location at a lower side portion and a muddy water discharge passage 1b which communicates with a muddy water transport location at a bottom portion. The muddy water suction passage 1a is provided with a suction gate 10 operated by an air cylinder 9 so that the muddy water suction passage 1a can be opened and closed, and the muddy water discharge passage 1b is operated by an air cylinder 12 at an exhaust gate. 13 is provided, and the muddy water discharge path 1b can be opened and closed.

Level switches 14 and 15 are provided at the upper and lower parts of the casing 1, respectively. The upper level switch 14 is the casing 1
The lower level switch 15 detects the completion state of muddy water filling, and the lower level switch 15 detects the completion state of muddy water discharge. Further, the measurement signals of the level switches 14 and 15 are sent to the controller 3 and are used as information for sequence control of the suction / exhaust gates 10 and 13 and opening / closing control valves 5 to 7 described later.

On the other hand, on the upper surface of the casing 1, the inside of the casing 1 is evacuated to create a vacuum, and
An air supply / exhaust port 1c is formed to allow compressed air for injecting muddy water to flow in. The air supply / exhaust port 1c is connected to the suction port of the ejector 4 by an air discharge path 23 through the opening / closing control valve 16 in the middle, and the opening / closing control valve 5 is connected to the compressed air inlet of the ejector 4 through the middle. Compressed air from the compressor 2 is sent to the ejector 4 by the air flow path 20, and the air in the casing 1 is sucked to evacuate the inside of the casing 1.

Further, the air discharge path 23 and the midpoint of the air flow path 20 from the compressor 2 to the opening / closing control valve 5 are connected.
A compressed air supply passage 21 is provided to connect the intermediate point of the compressed air from the compressor 2 and the compressed air from the compressor 2 is supplied into the casing 1.

Further, an outside air communication passage 22 is formed so as to be connected to the air discharge passage 23, so that the inside of the casing 1 whose pressure has been reduced or increased can be instantly atmospheric pressure. The open / close control valve 5 provided in the air flow path 20, the open / close control valve 6 provided in the compressed air supply path 21, and the outside air communication path 22.
The opening / closing control valve 7 provided in the control valve 3 and the opening / closing control valve 16 provided in the air discharge passage 23 are controlled by the controller 3 in their opening / closing operations.

The air discharge path 23, the compressed air inflow path 21, and the external communication path 22 may be connected to the casing 1 by independent flow paths. In short, there is no problem as long as the air flow path having the respective functions for the casing 1 is formed.

On the other hand, the air passage 2 branched from the air passage 20 and connected to the air cylinders 9 and 12, respectively.
1 is formed, and the compressed air of the compressor 2 is used as a drive source of the air cylinders 9 and 12. The operation control of the air cylinder 9 and the air cylinder 12 is performed by controlling the flow path switching valves 8 and 11 provided in the middle of the air flow path 21 under the command of the controller 3.

By the way, in the above-mentioned specific example, in order to downsize the device and save labor, etc., the drive of all the operating parts can be covered by the flow path switching control of the compressed air sent from one compressor 2. However, for example, the air cylinders 9 and 12 may be hydraulic cylinders, or the ejector 4 may be a vacuum generating device such as a vacuum pump or a diffusion pump.

In the actual transportation of muddy water under the apparatus constructed as described above, the operation is performed according to the following procedure. (1) Compressed air from the compressor 2 to the ejector 4 with the intake gate 10 opened, the discharge gate 11 closed, the open / close control valves 5 and 16 both open, and the open / close control valves 6 and 7 closed. The muddy water is gradually introduced into the casing 1 through the suction gate 10 while the inside of the casing 1 is evacuated.

(2) If muddy water collects in the casing 1 and the liquid level reaches the upper level switch 14 installation position and the level switch 14 detects this, the controller 3 receives the signal and After closing both the suction gate 10, the opening / closing control valve 5 and the opening / closing control valve 16, the opening / closing control valve 7 is opened to bring the inside of the casing 1 to atmospheric pressure. At this stage, muddy water filling in the casing 1 is completed.

(3) Next, with the open / close control valve 7 closed and the discharge gate 13 open, the open / close control valve 6 is opened.
Is opened to feed the compressed air from the compressor 2 to the casing 1, and the muddy water filled in the casing 1 is conveyed by being pushed out from the discharge line by the compressed air.

(4) When the transportation of the muddy water is completed and the inside of the casing 1 becomes empty, the lower side level switch 15 detects this. The controller 3 that receives this detection signal detects that the discharge gate 1
After closing 3 and closing the opening / closing control valve 6, the opening / closing control valve 7 is opened to bring the inside of the casing 1 to atmospheric pressure. By repeating the above transfer steps (1) to (4), muddy water is transferred in sequence.

Next, a second specific example in which a part of the specific example is modified will be described in detail with reference to FIG. The second specific example shown in FIG. 2 is a modification of the vacuuming mechanism in the casing 1. As shown in the figure, a vacuum tank 16 is provided, the vacuum tank 16 and the intermediate portion of the air discharge path 23 are connected by a communication path 23a, and an opening / closing control valve is provided on both sides across this communication point. In this example, 17 and 18 are provided.

By adopting the above-mentioned configuration, in the case of the first embodiment shown in FIG. 1, it takes time because the ejector 4 sucks the muddy water into the casing 1 gradually, whereas in the second embodiment of the present invention. In this case, since the inside of the vacuum tank 16 is made to be a vacuum state before the suction of the muddy water, the opening / closing control valve 18 is opened to communicate with the casing 1 at the time of sucking the muddy water. It becomes possible to suck, and the transfer efficiency is dramatically improved by shortening the suction time.

Explaining in more detail according to the operation procedure, first, in the initial state (operation start preparation stage), the opening / closing control valves 5 and 17 are opened and compressed air is sent from the compressor 2 to the ejector 4 to evacuate the inside of the vacuum tank 16. To do. Next, when muddy water is sucked into the casing 1, the opening / closing control valve 18 is opened to fill the muddy water into the casing 1 at once. When the muddy water filling is completed, the opening / closing control valve 18 is closed while the opening / closing control valve 6 is opened to allow the compressed air from the compressor 2 to flow into the casing 1 to pump the muddy water under pressure. During this discharge step, the compressed air from the compressor 2 is also sent to the ejector 4 to evacuate the inside of the vacuum tank 16. Specifically, the vacuum detector 16a that detects the vacuum state in the vacuum tank 16 and the opening / closing control valves 5 and 17 are linked under the control of the controller 3. If the pressure in the vacuum tank 16 rises due to the suction of muddy water, the controller 3 that detects this raises the open / close control valves 5 and 17 to supply compressed air to the ejector 4, while exhausting the air in the vacuum tank 16. To do. When the inside of the vacuum tank 16 reaches a certain vacuum state, the vacuum detector 16a detects this, and the controller 3 closes both the open / close control valves 5 and 17 to complete the vacuumization of the vacuum tank 16. In this way, the inside of the vacuum tank 16 is maintained in a constant vacuum state, and when the work enters the muddy water suction process, the opening / closing control valve 18 is opened to guide the muddy water into the casing 1 at once. 19
Is a pressure switch for constantly monitoring the pressure in the air passage 21 and issuing an alarm when the pressure falls below a set value.

Further, as shown in FIG. 3, two casings 1 of such a pneumatic muddy water conveying device are arranged so that one device discharges muddy water while the other device sucks muddy water. By performing the simultaneous operation while shifting the suction / discharge process from each other, continuous discharge can be performed.

By the way, when it is expected that the suction of muddy water will be difficult even by the above-mentioned apparatus, specifically, in the case of highly viscous high-concentration mud or solid-containing mud, etc., the following conveyance assisting device By using together, it becomes possible to easily inhale muddy water. First, in the case of the first auxiliary device shown in FIG. 4, the inside of the muddy water suction passage 1a constituted by the muddy water suction pipe 31 and the suction hose 35.
In addition, a spiral member 40 having an outline dimension that is in contact with or close to the inner wall surface of the passage is internally provided, and a base plate 39 is fixed to the peripheral edge portion of the suction port end via connecting rods 38, 38. The hydraulic motor 34 is fixed to the hydraulic motor 39, and the driving shaft 34a of the hydraulic motor 34 and the spiral member 40
Is fixed to the spiral member 40 so that the spiral member 40 can be rotated around the axis of the muddy water suction passage.
The high-concentration muddy water that moves inside and the inner wall surface of the suction passage are cut off to facilitate the suction of muddy water. As the spiral member 40, a ribbon screw formed by spirally processing a plate-shaped long member or a spiral screw formed by a wire rod can be used. Also, the mud suction pipe 31 that does not deform
The ribbon screw having a certain degree of rigidity may be used therein, and the suction hose 35 may be formed of a coil spring-shaped spiral member in order to correspond to the flexibility of the hose.

Next, the second auxiliary device shown in FIGS. 5 to 7 further has screw blades 37b which are bilaterally symmetric with respect to the horizontally placed rotary drive shaft 37a in the outer portion of the suction inlet of the muddy water suction passage 1a. It is an example equipped with a screw feeder type mud collector. More specifically, the muddy water suction passage 1 including the muddy water suction pipe 31 and the suction hose 35.
Regarding a point in which a spiral member 40 having an outline dimension that comes into contact with or close to the inner wall surface of the passage is provided in a, and a point in which the spiral member 40 is rotatable by a hydraulic motor 34 around the axis of the suction passage. However, in this embodiment, the mudguard hood 30 having an arcuate cross section is fixed to the suction port 31a of the mud suction pipe 31, and the tune box 32 is fixed to the mudguard hood 30. The tune box 32 is provided with a screw feeder 37 which is rotatable while being inserted.

In the chain box 32, a chain 36 is bridged between a sprocket 33a rotated by a hydraulic motor 33 and a sprocket 38 fixed to a screw shaft 37a of the screw feeder 37, and a hydraulic motor The screw feeder 37 is rotationally driven by 33, and the screw blades 37b and 37b of the screw feeder 37 are symmetrically arranged on the left and right sides of the installation position of the chain box 32. Muddy water and solid matter are collected from both sides to the suction port 31a.

[0032]

As described above in detail, according to the present invention, even high-concentration muddy water can be efficiently transported without clogging failure and is mixed with solid matter such as pebbles, lumber and wood chips. It will be possible to transport without leaving.

[Brief description of drawings]

FIG. 1 is a schematic view of a first specific example of a pneumatic mud transport device according to the present invention.

FIG. 2 is a schematic view of a second specific example of the pneumatic mud transport device according to the present invention.

FIG. 3 is a side view of a dual pneumatic pneumatic mud carrier.

FIG. 4 is a plan view showing a first specific example of a muddy water transportation auxiliary device.

FIG. 5 is a plan view showing a second specific example of the muddy water transportation auxiliary device.

6 is a view taken along the line VI-VI of FIG.

FIG. 7 is a view taken along the line VII-VII in FIG.

FIG. 8 is a diagram showing a conventional procedure for drawing out muddy water.

FIG. 9 is a diagram showing a conventional procedure for drawing out muddy water.

[Explanation of symbols]

1 ... Casing, 1a ... Mud suction passage, 1b ... Mud discharge passage, 2 ... Compressor, 3 ... Controller, 4 ... Ejector,
5-7 / 16/16/18 ... Open / close control valve, 9/12 ... Air cylinder, 10 ... Suction gate, 13 ... Discharge gate, 1
4.15 ... Level switch, 20 ... Air flow passage, 21 ... Compressed air inflow passage, 22 ... External communication passage, 23 ... Air discharge passage,
30 ... Hood, 31 ... Mud suction pipe, 32 ... Chain box, 33/34 ... Hydraulic motor, 35 ... Suction hose, 40 ... Spiral member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Otsubo 1-51-3 Matsubara, Setagaya-ku, Tokyo 1st Nagatomo Building Co., Ltd. Ohmic Co., Ltd. (72) Inventor Mitsuhiro Shibasaki 1-6, Moto-Akasaka, Minato-ku, Tokyo No. 4 in Chemical Grout Co., Ltd. (72) Inventor Hiroshi Otaki 1-6-4 Moto-Akasaka, Minato-ku, Tokyo Inside Chemical Grout Co., Ltd.

Claims (7)

[Claims] 1. A mud water suction passage whose opening / closing can be controlled and a mud water discharge passage whose opening / closing can be controlled are connected to each other, and an air discharge passage for discharging internal air and an air inflow passage for letting compressed air flow in are provided. A connected hollow closed container, a vacuum generator for vacuuming the inside of the hollow closed container by extracting air from the air discharge passage, and filling the hollow closed container with muddy water from the muddy water suction passage, and the air inflow A pneumatic mud conveying device, comprising: compressed air generation means for supplying compressed air into the hollow closed container from a path and for feeding the filled mud through the mud discharge path. 2. A vacuum tank is separately provided, the vacuum tank is connected to the middle of the air discharge path, and an opening / closing control valve is provided at least on the hollow closed container side from this connection point,
The pneumatic muddy water conveying device according to claim 1, wherein the vacuum tank is set in a vacuum state in advance before the muddy water is filled in the hollow closed container, and the muddy water is filled by opening / closing the opening / closing control valve. 3. The pneumatic transfer device according to claim 1, wherein the vacuum generating device is an ejector for evacuating the inside of the hollow closed container by using compressed air from the compressed air generating means. 4. The pneumatic mud conveying device according to claim 1, wherein an open / close controllable external communication passage connected to the hollow closed container is formed. 5. The pneumatic mud conveying device according to claim 1, wherein level switches are provided at an upper portion and a lower portion of the hollow closed container. 6. A muddy water suction passage is internally provided with a spiral member having an outline dimension that comes into contact with or close to the inner wall surface of the muddy water suction passage, and the spiral member is rotated around a shaft line of the muddy water suction passage by a rotation driving means. The pneumatic mud transport device according to claim 1, which is rotatable. 7. An empty space according to claim 1, further comprising a screw feeder type mud collecting device having spiral screw blades which are symmetrical with respect to a horizontally placed rotary drive shaft, on the outer side of the suction port of the muddy water suction passage. Pressure type mud carrier.