JPS5886230A - Monitoring device for density distribution in mud discharge pipe in dredger - Google Patents

Abstract

PURPOSE:To improve an operating efficiency, by a method wherein precipitation is prevented from occurring through graphic display of density distribution in a pipe by means of a detecting signal from a density meter. CONSTITUTION:A density meter 1 consists of a plurality of r-radiation oscillator 4 and a receiver 5 which are located in a plurality of levels as against a horizontal installation part of a mud discharge pipe 6 to detect a density of mud at each level. Based on the signal from the density meter 1, from a density at each level and its position in the mud discharge pipe, a density distribution in the pipe is operated by an arithmetic unit 2. The operating result is graphically displayed in a CRT display device 3. In case a mud content is constant and a graph pattern is different, the monitoring device finds a difference in an earth quality. Thus, it is monitored whether or not the pattern approaches a precipitation limit in the pipe, which is known from an experience, and this prevents the occurrence of precipitation and allows to perform a high-efficiency operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a density distribution monitoring device in a dredger's sludge pipe.

The density distribution inside the sludge pipe is the gold mud ratio (agedodo).

It is formed by a combination of three factors: soil quality and flow velocity, and if the operating conditions of the dredger remain constant, you can tell the difference in soil quality when the gold mud content is constant, and you can tell the difference in mud content when the soil quality is constant.

Therefore, by detecting the W iJt distribution, it is possible to detect the sedimentation status of the sludge pipe and to efficiently operate the sludge pipe while preventing the sedimentation.

One way to know the density distribution is to install a transparent pipe in a part of the sludge pipe to monitor the mud situation, but the mud (earth-containing sand) quickly becomes opaque, making it difficult to achieve this purpose. I can't.

The present invention has been made in view of the above circumstances, and its purpose is to provide a dredger that can graphically display the density distribution of mud in the mud removal pipe and improve operational efficiency while preventing sedimentation. The purpose is to obtain a density distribution monitoring device within a sludge drainage pipe.

That is, the present invention detects multiple levels of density in a dredger's sludge removal pipe - a densitometer consisting of a γ-radiation transmitter and a receiver, and an arithmetic device that calculates the density distribution in the pipe based on the density detection signal from the densitometer. This is a density distribution monitoring device in a dredger's sludge removal pipe, which is equipped with a CRT fi indicator that graphically displays the density distribution in the pipe calculated by the calculation device.

The present invention will be described below with reference to illustrative embodiments.

FIG. 1 is a block diagram of the severity distribution/benefit theory device. Is this device severe? A computing device 2 is connected to t1, and a CRT display 3 is connected to this computing device 2.

As shown in FIGS. 2 and 3, the "density" 1 consists of a plurality of sets of γ~radiation signal transmitter 4 and receiver 55, and these transmitters 4 and receivers 5 are connected to the sludge U6. Transmitter 4 is placed at the height level of the membrane for 4 horizontal installations to detect the severity of mud at each height level.
It is preferable that the arrangement spacing of the receivers 5 is such that the lower part of the sludge draining pipe 6 where sedimentation and sludge are more likely to occur is densely arranged, and the upper part thereof is sparsely arranged.

In addition, although 41 sets of transmitters 4 and receivers 5 are arranged in the actual row, the present invention is not limited to this. The signals of each height level detected at this density #t1 are converted into hypochondriacal signals, A/D converted, and input into the arithmetic unit 2. The calculation device 2 calculates the density distribution in the pipe from the density of each level and its position in the sludge pipe. This calculation result is displayed on the CRT display 3 as a graph such as a broken line or an approximate curve, with the vertical axis representing the position within the sludge pipe and the yellow axis representing the density signal at each point.

The density distribution within the pipe expressed in this way is determined by the gold mud ratio (the average value of the internal density) K when the soil quality is constant, assuming that the operating conditions of the dredger (drainage distance, pump rotation speed) are constant.・The seven turns are different, and when the gold ratio is constant, the pattern will be different depending on the position.

According to this monitoring device, the pattern shown on the CRT display 3 is visually monitored, and if the mud content is constant and the gelatin foot e-turn is different, this indicates a difference in soil quality. When the soil quality of (goods) is constant, the pattern will be constant. Therefore, by monitoring whether or not this pattern reaches the sedimentation a limit in the pipe, which is known from experience, highly efficient operation can be performed while preventing sedimentation.

For example, when mud begins to settle in a, the sieve density reaches the level where mud is drained 6--... Conditions occur continuously. If the high/stability state continues for a period of time at any detection level, the calculation unit 2 will generate all alarms, and the swing winch will be stopped manually or automatically. As the operation continues, the mud that has formed a chemical compound in d is washed away, and sedimentation of mud can be prevented in advance.

Then, the rudder swing starts again and returns to normal driving. As described above, according to the present invention, the current density distribution can be monitored from the corner of the eye, so you can drive based on this. For example, it is possible to operate efficiently while preventing sedimentation and solidification of earth and sand.

[Brief explanation of drawings]

FIG. 1 shows two parts of a density distribution monitoring device showing one embodiment of the present invention.
FIG. 172, FIG. 2, and FIG. 3 are explanatory diagrams showing the arrangement state of the Ai inertness meter. DESCRIPTION OF SYMBOLS 1... Preparation meter, 2... Arithmetic device, 3... CRT display, 4... γ-radiation source [8 devices, 5... Receiver,
6...Sludge drainage pipe 0 Applicant 1 Nobuto Natsuyo Patent attorney Takehiko Reie 5- Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A densitometer consisting of a γ-radiation transmitter and a receiver that detects all the densities at multiple levels in the dredger's sludge removal pipe, a calculation device that calculates the density distribution inside the pipe based on the density detection signal of the densitometer, and a calculation device that calculates the density distribution in the pipe based on the density detection signal of the densitometer A density distribution monitoring device in a dredger's sludge removal pipe, comprising a CRT display that graphically displays the density distribution in the pipe calculated by the device.