JP2000121513A - Sea-bed mud automatic sampling device for investigating ocean contamination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save the labor and reduce the time for sampling sea-bed mud and to improve the accuracy for sampling a sea-bed organism (benthos). SOLUTION: The device comprises four portions, namely a sea-bed mud suction equipment 1, a mud separation/benthos automatic screening equipment 3, a sea-bed mud-carrying equipment 2, and a drive power equipment. Also, the device is provided with a device for automatically adjusting the flow rate where the sea-bed mud suction equipment 1 is checked by a posture stability instruction equipment 10 for the levelness at a sea-bed arrival point, the mud separation/benthos automatic screening equipment performs screening by the shower of seawater, and the sea-bed mud-carrying equipment 3 detects the fluid flow rate in a hose with a flowmeter, and the drive power equipment has an automatic flow rate controller 6 which is automatically adjusts the flow rate being detected by the flowmeter to a preset value in advance. The seabed mud automatic sampling device reduces the fatigue of operation as compared with the mud-sampling method that has been performed by human power conventionally, the scattering of the sampling rate of mud is reduced and the sampling rate is improved, and the sampling time of the benthos can be drastically reduced due to the seawater shower system, and the sampled mud cannot be allowed to flow to the sea due to a completely sealed container when screening the benthos.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically collecting submarine mud for the purpose of investigating marine pollution.

[0002]

2. Description of the Related Art Conventionally, for collecting seabed mud for the purpose of investigating marine pollution, a grab collecting device such as an Ekman barge type is generally used. However, in this method, the grab sampler is dropped from the ship to the seabed, and the grab is closed by a spring method to collect the mud. Since the work is performed manually, the degree of fatigue of the work and the success rate of the mud sampling (per sampling time) There is a problem with the variation in the amount of mud), and in the case of collecting benthic organisms (benthos), it takes a long time to sift by hand and the mud collected at the time of sieving together with bentos There is a problem that there is a loss of flowing into the sea and there is a problem.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic marine sediment collecting apparatus for investigating marine pollution which solves the above-mentioned problems.

[0004]

In order to achieve the above-mentioned object, the present invention comprises four parts: a submarine mud suction device, a mud separation / vents automatic sieve device, a submarine mud carrier and a driving power unit. Features. In addition, the seabed mud aspirator checks the level at the seabed landing point using a posture stability indicator, the mud separation / vents automatic sieve uses a seawater shower, and the seabed mud carrier uses the fluid flow rate in the hose. Is detected by a flow meter, and the drive power unit has a flow rate automatic adjusting device for automatically adjusting the flow rate detected by the flow meter to a preset value.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic submarine mud collecting apparatus according to the present invention reduces the fatigue of work compared with the conventional manual mud collecting method, reduces the variation in the mud collecting rate and achieves a high collecting rate. In addition, the collection time of bentos is greatly reduced due to the seawater shower system, and when sifting bentos, it is necessary to flow the collected mud to the sea because it is in a completely enclosed container There is nothing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a submarine mud suction device, 2 is a submarine mud transporter, 3 is an automatic sieve for separating muds and vents, 4 is an air compressor, 5 is an air piping hose, 6 is an automatic flow control device, Reference numeral 7 denotes a stainless mesh, which sucks mud and seawater from the bottom mud layer 14, discharges seawater from the seawater outlet 20, removes mud from the mud outlet 21, and removes vents remaining on the stainless mesh 7. FIG. 1 is a diagram illustrating an entire apparatus having a series of functions for collecting data. FIGS. 2 and 3 show the structure of the submarine mud suction device.
With 8 submarine mud suction pipes, submarine mud can be sucked by the compressed air blown out from the 23 compressed air blowing section. Also, the horizontality of the seabed mud suction skirt is confirmed by the 8 attitude sensor, 9 sensor wire cable and 10 attitude stability indicating device, and thereby the attitude is controlled by the rope. Fig. 4 and Fig. 5 show the structure of the automatic mud separation / vents sieve, and the bottom mud sucked from the 14 bottom mud layer is transported to the 3 automatic mud separation / vents sieve by the 2 subsea mud transporter. If you want to collect a mixture of mud and seawater, and only the mud, remove 7 stainless steel mesh, open a valve at 20 seawater discharge port to discharge only seawater and leave mud. If it is desired to collect only bentos, a 7 stainless steel mesh can be installed, seawater can be discharged from 20 seawater outlets, and bentos can be left on the 7 stainless steel mesh. At this time, by shortening the seawater from the top of the sieve, the time required for the automatic vents sieve operation can be reduced.

[0007]

According to the present invention, as described above, the collection of mud and benthic organisms (bentos) on the sea floor is automated by a bubble pump system using compressed air, and the collection time of mud and benthic organisms (bentos) is reduced. This has the effect of being greatly reduced (approximately 1/6) and improving the collection accuracy of benthic organisms (benthos) more than twice as much as the conventional one.

[Brief description of the drawings]

Fig. 1 Schematic diagram of the whole seabed mud collecting device for the purpose of marine pollution survey

FIG. 2 is a side sectional view of a submarine mud suction device.

FIG. 3 is a plan view of a submarine mud suction device.

Fig. 4 Side view of mud separation / vents automatic sieve

Fig. 5 Plan view of automatic sieve separator / vents sieve

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Submarine mud suction device 2 ... Submarine mud transporter 3 ... Mud separation / vents automatic sieve device 4 ... Air compressor, 5 ... Air piping hose 6 ... Automatic flow control device, 7 ... Stainless steel mesh 8 ... Attitude sensor, 9 ... Electrical cable for sensor 10 ... Posture stability indicating device, 11 ... Rope for lifting 12 ... Bents, 13 ... Sea bottom, 14 ... Bottom mud layer, 15 ... Sea surface 16 ... Sea bottom mud collecting ship, 17 ... Sea bottom mud suction skirt 18 ... Submarine mud suction pipe, 19 ... seawater shower, 20 ...
Seawater outlet, 21 ... mud outlet, 22 ... air escape pipe,
23: compressed air blowing section, 24: mud / seawater mixed liquid

Claims (2)

[Claims] 1. An apparatus for automatically collecting seabed mud, wherein the seabed mud is sucked by compressed air using a bubble pump system, and the seabed mud is automatically separated and stored from seawater by an automatic mud separator / bent sieve on board. . 2. A method in which seabed mud is sucked by compressed air using a bubble pump method, and benthic organisms (benthos) are automatically collected on a stainless mesh sieve by an automatic sieve for separating and venting mud on a ship. Bottom mud automatic sampling equipment