JP2002054173A - Sediment detecting method for pneumatic force-feeding sediment transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accurate sediment detecting method for a pneumatic force-feeding sediment transport device. SOLUTION: The pneumatic force-feeding sediment transport device allows a fluid F, wherein an air phase E and a sediment phase D exist alternately, to move through a mud carrying pipe 2 and supplies a hardener C for the purpose of processing the sediment D as solidified earth. An intermediate pipe body 9 is displaceably supported on part of the pipe 2 on the upstream side of the coupling part 1a of the a hardener supplying device 1 by the weight of the fluid D moving through the pipe body 9. The displacement of the pipe body 9 is detected by a load meter 15, and the rate and volume of transportation of the sediment phase D are determined according to a signal from the load meter 15 by means of an arithmetic unit 18. Furthermore, the control of the device 1 permits the hardener C to be supplied to the sediment phase D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting sediment in a pneumatically transported sediment transporting apparatus, and more particularly, to transporting sediment, particularly soft soil such as sludge or dredged soil, using pressurized air, and the transport process. The present invention relates to a method for detecting a sediment in a pneumatic-feeding type sediment transporting apparatus in which a solidifying agent is mixed and discharged to a predetermined place as a solidified soil.

[0002]

2. Description of the Related Art Conventionally, as one method of transporting soft soil such as sludge and dredged soil, such soft soil is supplied to a soil and sand supply device to which a mud pipe is connected, and is provided alongside the soil and sand supply device. By supplying pressurized air from a pressurized air supply device (compressor), the sediment phase, a so-called plug (unit mass of sediment) and the air phase are alternately striped, and flow through the mud pipe as a fluid. Pneumatic feeding in which the air phase and the sediment phase are separated by a discharging device provided at the rear end of the mud pipe, for example, a discharging device such as a cyclone, and the sediment phase is discharged to a predetermined place. BACKGROUND OF THE INVENTION Sediment transport systems are known.

[0003] When the above soft soil is used for landfill, a solidifying agent such as lime or cement is mixed with the soft soil in order to solidify the soft soil at an early stage. Therefore, in order to increase the mixing efficiency, a solidifying agent supply device is connected to a mud pipe in the pneumatic feeding type sand transport apparatus, and a solidifying agent is supplied to a sediment phase transported in the mud pipe to solidify the soft soil. A method of discharging to a predetermined landfill site as treated soil has been proposed, for example, as Japanese Patent No. 25555441.

[0004] In such a system in which soft soil is discharged as solidified soil by such a pneumatic-feeding type soil transport device, in order to homogenize the strength of the solidified soil, the "amount and speed" of the soft soil transported as a sedimentary phase are determined. Detecting and controlling the solidifying agent supplied from the solidifying agent supply device to a solidifying agent corresponding to the soil amount of the sedimentary phase with high accuracy according to the detected value to the sedimentary phase, thereby making the solidifying agent addition rate uniform. Is preferred.

[0005] That is, the soft soil transported as the sedimentary phase is
The amount (proportion) of the solidifying agent supplied by the soil is determined, but the amount (size) of the sediment transported through the mud pipe often changes. It is good to increase or decrease the supply amount of.

On the other hand, the air phase and the earth and sand phase are alternately transported in the mud pipe as described above. In order to increase the mixing efficiency of the solidifying agent, this earth and sand phase is used in the solidifying agent supply device. This solidification agent may be supplied when the connection is reached. From such technical problems, it is necessary to control the "supply time and supply amount" of the solidifying agent by detecting the state of the earth and sand in the mud pipe, that is, the "amount and transport speed" of the earth and sand.

Conventionally, as such a method for detecting earth and sand, a)
A method in which the internal pressure of the mud pipe is detected, and when the pressure is high, a sediment phase is considered to be present. B) A rod-shaped sensor with a strain gauge attached at the base is mounted protruding into the mud pipe,
A method to detect the presence of the sediment phase from the vibration characteristics of this sensor, and c) a vibrometer and a transceiver that generates ultrasonic waves are installed outside the mud pipe. A judgment method and the like are adopted.

[0008]

However, each of the above-described conventional methods for detecting earth and sand has problems. That is,
In the method a), when the pressure is high, the sediment phase does not always exist there, and therefore, the reliability is low.

In the method b), no sedimentary phase that does not come into contact with the sensor cannot be detected, and heavy coarse particles such as contaminants and rubble are entangled with the sensor and begin to accumulate on the bottom of the mud pipe. There was a risk of closing this mud pipe.

Further, in the method c), when foreign matter or debris is mixed in the earth and sand, the vibration sound or the like when the foreign matter and the debris come into contact with the inner wall of the mud pipe becomes noise, so that the sediment phase can be discriminated. If it is difficult, or if part of the soil adheres or accumulates in the mud pipe, there is a problem that it is difficult to detect the sediment phase thereafter. That is, any of the conventional methods for detecting earth and sand cannot accurately detect the earth and sand phase, and as a result, there has been a problem that it is not possible to efficiently supply the solidifying agent.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned essential problems of the prior art, and is constituted as follows.

According to a first aspect of the present invention, there is provided a method for detecting a sediment in a pneumatic feeding type sediment transporting device, wherein a fluid in which an air phase and a sediment phase alternately exist in a mud pipe connected to a solidifying agent supply device. The pneumatically fed sediment transport apparatus is configured to supply a solidifying agent to the earth and sand phase from a solidifying agent supply device to convert the earth and sand into a solidified soil and discharge the discharged soil from a discharging device. A part of the mud pipe on the upstream side of the connecting part is supported so that it can be displaced by the weight of the moving fluid, and a change in load due to the displacement of the mud pipe can be detected by a load meter. The signal of the load cell is processed by an arithmetic unit to determine the transport amount of the sediment phase, and the solidifying agent supply device is controlled by the transport speed and the transport amount of the sediment phase to supply the solidifying agent. And

[0013] As described above, a part of the mud pipe is supported so as to be displaceable by the weight of the moving fluid, particularly the sediment phase. Is possible. Then, since the load changes when the amount of the soil increases or decreases, the transport amount of the earth and sand is obtained based on the signal of the load change, and the solidifying agent supply device is controlled based on the obtained amount.

The method of determining the transport amount of the moving sedimentary phase with one load cell can be suitably applied to a fluid in which the transporting speed of each sedimentary phase is known and considered to be equal. 1 shows a basic technical idea of the invention. However, when the transport speed of each sedimentary phase is different,
Since an error occurs in the calculated value, it is preferable to employ a detection method described later.

2) A method for detecting the earth and sand in the pneumatic earthing and sand transporting device according to the second aspect, wherein the mud feed pipe upstream of the connecting portion of the solidifying agent supply device can be displaced by the weight of the moving fluid. An intermediate pipe, an upstream first mud pipe connected to both ends of the first intermediate pipe via a flexible pipe, and a downstream second mud pipe; The displacement of the intermediate pipe is detected by a load meter.

As described above, a part of the mud feeding pipe on the upstream side of the connecting portion of the solidifying agent supply device is connected to the first mud feeding pipe on the upstream side and the second muddy pipe on the downstream side via the flexible pipes. Since the first intermediate pipe is composed of the first intermediate pipe connected to the mud pipe, the first intermediate pipe is easily displaced by the weight of the moving fluid. And it can detect correctly.

According to a third aspect of the present invention, there is provided a method for detecting a sediment in a pneumatic feeding type sediment transporting apparatus, wherein a mud pipe on an upstream side of a solidifying agent supply device is displaced by the weight of a moving fluid. One intermediate pipe, a downstream second intermediate pipe mud feeding pipe, and a third pipe connected between the first intermediate pipe and the second intermediate pipe via a flexible pipe. A mud pipe, a first mud pipe connected to an upstream side of the first intermediate pipe via a flexible pipe, and a mud pipe connected to a downstream side of the second intermediate pipe via a flexible pipe It is constituted by a second mud feed pipe, and the displacement of each of the first intermediate pipe and the second intermediate pipe is detected by a first load cell and a second load cell.

According to this method, the weight of the moving fluid can be detected in each of the first intermediate pipe and the second intermediate pipe. It can be detected easily and easily.

According to a fourth aspect of the present invention, in the sediment detection system in the pneumatically fed sediment transporting apparatus, a part of the mud pipe upstream of the connecting portion of the solidifying agent supply device can be displaced by the weight of the moving fluid. In the case of the first intermediate pipe or the second intermediate pipe, the length of the first intermediate pipe or the second intermediate pipe is longer than the length of the earth and sand phase moving. It is characterized by.

According to such a method, the weight of the sediment phase can be detected at once, so that the amount of the conveyed sediment can be detected accurately and quickly.

5) The earth and sand detection system in the pneumatically transported earth and sand transportation device according to claim 5 is configured such that the weight of the moving fluid is
Detection is performed by at least two load cells arranged so as to have a predetermined interval.

According to such a method, even when the signals of the two load cells are used as on-off signals, the transport speed of the earth and sand phase can be easily detected.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a sediment detection system in a pneumatic sediment transporting apparatus according to the present invention will be described with reference to FIGS.

Although the arithmetic and control in the following description is based on analog arithmetic and control, the difficulty and cost of the configuration and programming of the equipment to which the present invention is applied, such as digital arithmetic and control, are discussed. In this context, an appropriate calculation and control method currently used can be selected.

FIG. 1 is a system diagram for carrying out a method for detecting a sediment in a pneumatically fed sediment transporting apparatus according to the present invention. In this method, the transport speed of each sediment phase is known and considered to be equal. It is suitable for detecting the transport amount of the sedimentary phase of the fluid.

A fluid feeder 3 composed of a sediment feeder and a pressurized air feeder is connected to one end of a mud feeder 2 to which a solidifying agent feeder 1 is connected.
Is connected to a discharge device 4 such as a cyclone.

The sediment phase D is simply placed in a wide area by simply sending the mud pipe 2
When the water is discharged from the tank, there is no need to separate the sediment phase D such as the cyclone and the pressure air for transfer, and the discharge device 4 can be omitted.

The fluid F supplied from the fluid supply device 3 into the mud pipe 2, specifically, a mixture in which the sediment phase D and the air phase E are arranged in stripes, is transported by the mud pipe 2. When the sediment phase D reaches the connecting portion 1a of the solidifying agent supply device 1, a solidifying agent C such as lime or cement is supplied from the solidifying agent supply device 1, and the sediment phase D is solidified. And is sent to the discharge device 4 to be separated from the air phase E and discharged to a predetermined place.

The mud feed pipe 2 is connected to a first mud feed pipe 6 having a fluid feeder 3 connected to the front end thereof, to a solidifying agent feeder 1 and to a second feed pipe having a discharge device 4 connected to the rear end. It is composed of a mud pipe 7 and a first intermediate pipe 9 arranged at a predetermined distance upstream of the connecting portion 1a of the solidifying agent supply device 1.

The first mud feed pipe 6 and the second mud feed pipe 7 constituting the mud feed pipe 2 are supported by a plurality of supporting devices 22, and the first intermediate pipe 9 is located near the lower central portion. The first intermediate pipe 9 can be displaced downward by the weight of the fluid F transported in the pipe (up and down movement). And an inclined state).

Specifically, this mud pipe 2 generally has
Among the 6 m pipes, the first intermediate pipe 9 is the soil F passing through the inside.
It is possible to use a thin-walled tube capable of sensing the pressure, or to use a long tube to make it easy to bend and to be displaced downward by the weight of the fluid F moving inside the tube. 2 and the first flexible tube 1 at both ends as shown in FIG.
The first mud feed pipe 6 on the upstream side through the first and second flexible pipes 12
And the second mud feed pipe 7 on the downstream side.

The signal V1 from the first load cell 15 is input to an arithmetic unit 18 which constitutes a control unit 17 indicated by a two-dot chain line, and calculates the transport amount H of the soil F (fluid) transported there. Is required. Reference numeral 19 denotes a storage device that constitutes the control device 17, and the storage device 19 includes a mud pipe 2 in advance.
Of the cross section G of the load cell 15 and the connecting portion 1 of the solidifying agent supply device 1
The distance L4 to the a, the sediment phase transport speed t, and the specific gravity of the earth and sand are input.

In this configuration, when the sediment phase D forming the fluid F reaches the upstream end of the first intermediate pipe 9 as shown in FIG. To start displacing downward, and recover by the passage of sediment phase D.

An example of a load displacement when the earth and sand phase D passes through the first intermediate pipe 9 is a load change curve K1 shown in FIG. That is, when the sediment phase D starts flowing into the intermediate pipe 9, the load change curve K1 starts rising at the start point P1, reaches the peak point P2 with the movement of the sediment phase D, falls, and ends at P3. Become.

The load change curve K1 is derived from the signal V1 of the first load cell 15 by the time from P1 to P3 to the arithmetic unit 18 constituting the control unit 17 and input to the storage unit 19 in advance. Sediment phase D
V5 of the specific gravity W and the signal V4 of the cross-sectional area G of the mud pipe 2
And the transport speed V55, the transport amount H of the sediment F is obtained, and the signal V55 of the transport speed t and the signal V8 of the transport amount H are obtained.
Connection point 1a between the first load cell 15 and the solidifying agent supply device 1
And a signal V9 of a distance L4 to the control signal generator 20 is input to the control signal generator 20, where a control signal V10 is generated.
Then, the control signal V10 is supplied to the solidifying agent supply device 1 to control the same.

According to such a method of detecting the earth and sand, the displacement due to the load of the first intermediate pipe 9 can be detected by the first load meter 15 and the transport amount H of the earth and sand F can be obtained. This makes it possible to supply a solidifying agent.

FIG. 5 shows still another embodiment, in which a first intermediate pipe 9 and a second intermediate pipe 10 which are displaced by the weight of a moving fluid F are provided. A third mud feed pipe 8 fixed and supported by a support device 22 is disposed between the body 9 and the second intermediate pipe body 10, and both ends of the third mud feed pipe 8 are connected to flexible pipes 12, 14 respectively. Through the first intermediate pipe 9
And the first intermediate pipe 9 while being connected to the second intermediate pipe 10.
Is connected to a first mud feed pipe 6 by a flexible pipe 11, and a downstream side of the second intermediate pipe body 10 is connected to a second mud feed pipe 7 via a flexible pipe 14.

A first load cell 15 is arranged below the first intermediate tube 9, and a second load cell 16 is arranged below the second intermediate tube 10. The signals V1 and V2 of the first load cell 15 and the signal V3 of the second load cell 16 are input to an arithmetic unit 18 constituting a control unit 17.

More specifically, as shown by a solid line in FIG. 7, when the tip of the sediment phase D reaches the first intermediate pipe 9, the intermediate part of the first intermediate pipe 9 has a first load cell. The first load meter 15 detects a change in load accompanying the change, and inputs the detected change to the arithmetic unit 18 as a start point signal V1.

As shown by the dashed line in FIG.
When the sediment phase D moves to the outlet side of the first intermediate pipe 9, a load change is detected by the first load meter 15, and this is input to the arithmetic unit 18 as an end point signal V2. I have. Note that the first load cell 15 emits two signals of the front and rear ends of the earth and sand phase D.

On the other hand, the tip of the sediment phase D is
(Fig. 6), when the load changes, the second load meter 1
6, and the signal is input to the arithmetic unit 18 as a starting point signal V3.

As described above, the control device 17 is composed of an arithmetic device 18, a storage device 19, a control signal generation device 20, and the like.
And a distance L1 between the first load cell 15 and the second load cell 16
And the distance L2 between the second load cell 16 and the connecting portion 1a of the solidifying agent supply device 1 are input in advance.

Then, the signal V4 of the cross-sectional area G of the mud feed pipe 2 and the first load cell 15
And a signal V6 of a distance L1 between the first load cell 16 and the second load cell 16 are input to the arithmetic unit 18.

In the device configured as described above,
The fluid F in which the sediment phase D and the air phase E alternately flow down in the first mud feed pipe 6, and the tip of the sediment phase D passes through the first flexible pipe 11 to the first intermediate pipe. When it reaches the body 9, the starting point signal V1 from the first load weight 15 is input to the arithmetic unit 18, and when the sediment phase D further flows down and its tip reaches the second intermediate pipe body 10, A start point signal V3 from the second load cell 16 is input to the arithmetic unit 18, and the start point signal V3
The transport speed t of the sediment phase D is calculated from the 1 and the next start point signal V3 and the signal V6 of the distance L1 from the storage device 19.

The transport speed t is used in the calculation of the earth and sand transport amount H, which will be described later.
And a signal V9 at a distance L2 from the storage device 19.
And the signal V8 of the earth and sand transport amount H described later are
The control signal V10 created here is guided to the solidifying agent supply device 1, and the solidifying agent supply device 1 is controlled to supply the required amount of the solidifying agent C to the sediment phase D in a timely manner. It is designed to be mixed.

On the other hand, when the earth and sand phase D flows down and its rear end passes through the first intermediate pipe 9, an end point signal V2 from the first load cell 15 is input to the arithmetic unit 18 where the first load is applied. The transport amount H of the sediment phase D is calculated from the start point signal V1 and the end point signal V2 from the total 15, the signal V4 of the cross-sectional area G of the mud pipe 2 from the storage device 18, and the transport speed t of the soil. And the signal V8 of this transport quantity H
Is input to the control signal generation device 20.

As described above, the first intermediate pipe 9 and the second intermediate pipe 10 are fixedly supported by the first mud feed pipe 6 on the supply side, the second mud feed pipe 7 on the feed side, and the intermediate part. The third mud pipe 8 is cut off. Therefore, when the sediment phase D exists only in the first intermediate pipe 9, the first load cell 15 detects the load, but the second load cell 16 does not detect the load.

The method of detecting the transport amount of the sediment phase D by the above-mentioned apparatus will be briefly described. The load value that continues to immediately before in the first load cell 15 (the state in which the sediment phase D has not arrived)
The time at which a load increase equal to or more than a certain value is measured is set as the detection start time of the sediment phase D, and the start time and the duration of the sediment phase D are measured. At the same time, the second load cell 16 measures the detection start time of the sediment phase D, and obtains the transport speed from the time difference between the detection start times of the two load cells 15 and 16.

Then, the length of the sediment phase D is obtained from the duration of the state of detection of the sediment phase D by the first load cell 15 (or the second load cell 16) and the transport speed previously obtained. The transport amount of the sediment phase D is calculated by multiplying the cross-sectional area of the mud pipe 2. Note that the first mud pipe 6, the second mud pipe 7, the first intermediate pipe 9, and the like constituting the mud pipe 2 have the same cross-sectional area.

In the above-mentioned apparatus, the first intermediate pipe 9 and the second intermediate pipe 10 are supported by one load cell 15 and 16, respectively, so that the load accompanying the passage of the front or rear end of the earth and sand phase D can be obtained. Of the first intermediate tube 9 (or 1).
0) is supported by load cells arranged at two or more intervals, and the value of the sum of the measured values of these load cells with the inclination and / or subsidence of the first intermediate pipe 9 (or 10). , The passage of the front or rear end of the sediment phase D can be detected.

When one intermediate tube is supported by a load cell arranged at two or more intervals as in this configuration, the amount of inclination of the intermediate tube is reduced. The amount of deformation can be reduced, and the life of the connection portion of these flexible tubes can be extended.

[0052] Further, since a step formed between the intermediate pipes or between the intermediate pipe and the mud feed pipe can be reduced, it is possible to prevent the earth and sand phase from sticking at the flexible pipe portion or the like. The transportation of the sediment phase can be performed smoothly.

In short, the point is to detect the passage of the front end or the rear end of the earth and sand phase passing through the intermediate pipe body whose both ends are movably supported via the flexible member, based on the change in the weight of the intermediate pipe body. Therefore, a load cell suitable for this may be selected and arranged.

FIG. 8 shows still another embodiment, in which the length L5 of the first intermediate pipe 9 is formed so as to be longer than the length L6 of the earth and sand phase D which is predicted in advance. The first intermediate tube 9 includes a first load cell 15 and a third load cell 2.
1. The distance L3 between the first load cell 15 and the second load cell 16 is known.

The earth and sand detecting device is composed of a first load cell 15
From the start of the detection of the sediment phase D in the first step, the load values of the first load cell 15 and the third load cell 21 are measured, and the load value of the sediment phase D is detected with the maximum value of the sum of the two load values. Things
The transport speed is obtained from the time difference between the detection start times of the sediment phase D of the first and second load cells 15 and 16.

The device shown in FIG. 8 will be described in more detail. The first load meter 15 detects the starting point of the sediment phase D, and its signal V1 is input to the arithmetic unit 18 and the third load meter 15 The signal V11 of the first load cell 15 and the signal V1 of the first load cell 15
The total load of the earth and sand phase D is detected by the signal V11 of 1.

The storage device 1 constituting the control device 17
9, a distance L3 between the first load cell 15 and the second load cell 16, a distance L2 between the second load cell 16 and the connecting portion 1a of the solidifying agent supply device 1, and a specific gravity W of the sediment phase D Is input in advance.

In such a configuration, when the tip of the earth and sand phase D reaches the inside of the first intermediate pipe 9, the first load meter 15 detects this and inputs this start point signal V 1 to the arithmetic unit 18. When the sediment phase D further flows down and all of the sediment phase D flows into the first intermediate pipe 9, the arithmetic unit 18 outputs a signal V 1 of the first load cell 15 and a signal V 11 of the third load cell 21. , The total load of the sediment phase D is obtained, and the signal V5 of the specific gravity W of the sediment phase D from the storage device 19 is obtained.
Thus, the transport amount H of the earth and sand is calculated and obtained.

Therefore, even if the sediment phase D is incompletely filled such that the sediment phase D does not reach the top of the cross section of the pipe, or even if some sediment remains on the bottom wall of the pipe wall, The transport amount H of the earth and sand can be accurately detected.

Further, when the earth and sand phase D flows down and its tip reaches the inside of the second intermediate pipe 10, a starting point signal V3 from the second load cell 16 is inputted to the arithmetic unit 18. In the arithmetic unit 18, the start point signal V 1 of the first load cell 15, the start point signal V 3 of the second load cell 16, and the distance L 3 between the first load cell 15 and the second load cell 16 from the storage device 19. With the signal V6, the transport speed t of the sediment phase D is calculated and obtained.

Then, the signal V8 of the transport amount H of the earth and sand, the signal V7 of the transport speed t, and the signal V9 of the distance L2 from the storage device 19 are input to the control signal generating device 20, where the solidifying agent supplying device 1 Is generated.

As described above, the starting point signal V of the first load cell 15
1, the starting point signal V3 of the second load cell 16, the third load cell 2
The arithmetic unit 18 constituting the control unit 17
Is input directly to the storage device 19. For example, a predetermined load value is input in advance to the storage device 19, and a comparator is provided in the control device 17. After comparison with the predetermined load value from the control unit 19, the load value can be input to the arithmetic unit 18.

In the present invention, in the middle of the mud pipe,
A moving fluid, that is, an intermediate pipe that is displaced vertically or obliquely by the weight of the sedimentary phase is arranged, and the displacement of the intermediate pipe is measured using a load meter to determine the moving state of the sedimentary phase. It is configured to grasp accurately.

In the case where the earth and sand phase is homogeneous and the speed of movement is relatively stable, the use of only one load cell for one movably supported intermediate pipe makes it relatively favorable. The amount and speed of sediment transport can be detected.

However, when the cross section or form of the sedimentary phase changes or the speed fluctuates, two or more load cells are arranged for one intermediate pipe. The transport volume and transport speed of the sedimentary phase can be measured with high accuracy.

In addition, by arranging two or more members displaced by the movement of the earth and sand phase such as the intermediate pipe, it is possible to increase the accuracy of the detected value, and actually transport the earth and sand phase. It is preferable to provide each mechanism at the site in consideration of the quality of earth and sand, transportation speed, and the like.

Further, by providing a portion for sampling the sediment phase and a monitoring portion such as a viewing window in the middle of the mud pipe or in an intermediate pipe, the transport amount of the sediment phase can be efficiently and safely. Etc. can be detected.

[0068]

As is apparent from the above description, according to the solidifying agent supply system in the pneumatically conveyed sediment transporting apparatus according to the present invention, the mud pipe 6 upstream of the connecting portion 1a of the solidifying agent supplying apparatus 1 is connected. A part is supported so as to be displaceable by the weight of the fluid F to be transported.

The displacement of a part of the pipe (intermediate pipe) of the mud feed pipe 2 is detected by the load cell 15 in particular, and the signal of the load cell 15 is processed by the arithmetic unit 18 to obtain the fluid. Since the transport speed and the transport amount of the sediment D in F are determined, the transport speed and the transport amount of the sediment D can be accurately detected. As a result, the solidifying agent is efficiently supplied, and The effect of uniformizing the addition rate of slag is that a high-quality solidified soil with uniform strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram for carrying out a sediment detection method in a pneumatic-feeding type sediment transport device according to the present invention.

FIG. 2 is an enlarged view of a Z part which is a main part of FIG.

FIG. 3 is an explanatory diagram of an example of a signal extracting means in a case where a sediment detection method is implemented in the pneumatic-feeding type earth and sand transport device according to the present invention.

FIG. 4 is an explanatory diagram of signal processing in a case where a sediment detection method is performed in the pneumatic-feeding-type earth and sand transport device according to the present invention.

FIG. 5 is another schematic explanatory view of a case where the sediment detection method is implemented in the pneumatic-feeding-type earth and sand transport device according to the present invention.

FIG. 6 is an enlarged view of a part X in FIG. 5;

7 is an explanatory diagram of signal extraction when the earth and sand detection method shown in FIG. 6 is implemented.

FIG. 8 is a schematic system diagram of another embodiment for carrying out a sediment detection system in the pneumatically fed sediment transporting apparatus according to the present invention.

[Description of Signs] 1 solidifying agent supply device 2 mud feed pipe 3 fluid supply device 4 discharge device 6 first mud feed pipe 8 third mud feed pipe 9 first intermediate pipe 10 second intermediate pipe 11 1
4 Flexible tube 15 First load cell 16 Second load cell 17
Control device 18 Arithmetic device 19 Storage device 20 Control signal creation device 21 Third load cell 22 Support device

Claims (5)

[Claims] An air phase and a sedimentary phase move as a fluid alternately flowing in a mud pipe connected to a solidifying agent supply device, and the solidifying agent is supplied from the solidifying agent supply device to supply the solidifying agent. In a pneumatically-plowed sediment transporting apparatus in which soil is solidified and discharged from a discharging device as solidified soil, a part of a mud pipe on an upstream side of a connecting portion of the solidifying agent supply device is moved by a weight of a moving fluid. And the displacement of the mud pipe is detected by a load meter, and the signal of the load meter is processed by an arithmetic unit to determine the transport speed and transport amount of the sediment phase. A method for detecting a sediment in a pneumatically fed sediment transporting apparatus, wherein the solidifying agent supply device is controlled based on a transport speed and a transport amount of the phase to supply the solidifying agent to the sediment phase. 2. A first intermediate pipe capable of displacing a mud feed pipe upstream of a connecting portion of a solidifying agent supply device by the weight of a moving fluid, and flexible pipes at both ends of the first intermediate pipe. A first mud feed pipe on the upstream side and a second mud feed pipe on the downstream side that are connected via the so that the load change due to the displacement of the first intermediate pipe body is detected by a load meter. A method for detecting sediment in a pneumatically fed sediment transport apparatus according to claim 1. 3. A first intermediate pipe on the upstream side capable of displacing the mud feed pipe on the upstream side of the connection portion of the individualizing agent supply device by the weight of the moving fluid, and a second intermediate pipe on the downstream side. A third mud feed pipe connected between the first intermediate pipe and the second intermediate pipe via a flexible pipe, and a flexible pipe on the upstream side of the first intermediate pipe. A first mud pipe connected to the first intermediate pipe body and a second mud pipe connected to the downstream side of the second intermediate pipe body via a flexible pipe. 2. A method according to claim 1, wherein each displacement of the second intermediate pipe is detected by a first load cell and a second load cell. 4. A method according to claim 2, wherein said first intermediate has a length greater than a length of a moving sediment phase. 5. A method according to claim 1, wherein at least two load cells are arranged at a predetermined interval.