JPH0545948Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a slurry collector for collecting sediments such as mud deposited on the bottom of lakes, rivers, inner bays, etc. This invention relates to a columnar sediment sampler that collects sediment using a cylindrical core holder.

(Conventional technology) In recent years, for environmental surveys, etc., it has become necessary to collect sediment such as mud that has accumulated on the bottom of the water, and to examine its composition and the living organisms. . Various types of sampling devices have been considered to collect such sediments from the bottom of the water.
Most of the conventional methods were aimed at collecting sediments from deep seabeds, etc., and were considered to be relatively large-scale. However, the collection of sediment for environmental surveys, etc., from lakes, rivers, inner bays, etc.
Since it is held in a relatively shallow water depth of about 50 meters or less, a simple device that can be easily handled from a boat is required.

A columnar sediment sampling device is known as such a relatively small underwater sediment collecting tool. This slurry collector includes a cylindrical core holder and a core fall prevention valve that opens and closes the upper end of the core holder. A rope is connected to the mud collector, and after the mud is dropped from the boat and the mud is deposited on it, it is pulled up onto the boat using the rope. When the mud is applied correctly,
The lower end side of the core holder is inserted into the deposit, and the deposit is taken into the core holder. When lifting, the upper end of the core holder is closed by a core fall prevention valve, and the collected sediment is
In other words, the core is prevented from falling.

In this way, conventional columnar sediment collectors were simply dropped from a boat, and were forced to sink into the sediment under their own weight.

(Problems to be solved by the invention) By the way, in such a columnar slurry collector,
The mud does not always stick properly; for example, the mud may stick when the vehicle is overturned. At such times, no deposits are introduced into the core holder. However, with conventional mud collectors that deposit mud by simply dropping the mud, it is impossible to confirm whether mud has deposited correctly until the collector is pulled up. Therefore, there was a problem in that the mud sampling work had to be repeated, and the mud sampling work took time and effort.

Further, in a conventional device that uses its own weight to encourage the core holder to enter the sediment, it is required that the weight of the sediment sampler be sufficiently large. As a result, there was a problem in that the slurry collector was difficult to handle.

The present invention was developed in view of these problems, and its purpose is to provide a slurry collector that is easy to handle and that can reliably collect sediment from a boat. be.

(Means for Solving the Problems) In order to achieve this object, the present invention includes a weight that is movable up and down above a core holder catch that supports the upper end of the core holder. A rope is connected to the weight, which allows the weight to be lifted from the boat. Further, a support shaft for guiding the vertical movement of the weight is attached to the upper end surface of the core holder catcher, and a stopper for regulating the ascending position of the weight is provided on the support shaft. A core fall prevention valve that opens and closes the upper end of the core holder is provided in the core holder catcher so that it can move up and down.The core fall prevention valve lowers a rod-shaped valve holder that can be raised and lowered along the support shaft. The valve can be held in the closed state by pressing the valve from above.

(Function) With this configuration, when the mud sampler is dropped from the boat and the mud is deposited, the weight is pulled up using the rope, and then when the rope is released, the mud is deposited correctly. Sometimes the weight falls and collides with the top surface of the core holder catcher. As a result, an impact sound is emitted. Further, when the machine falls down and gets muddy, no impact sound is generated because the weight does not come into contact with the core holder catcher. Therefore, by listening to the impact sound, it is possible to confirm whether or not the mud sampler has correctly deposited mud on the boat.

Then, the core holder is driven into the deposit by hitting the upper end surface of the core holder catch with the weight. Therefore, even if the overall weight is relatively light, deposits can be reliably taken into the core holder.

Furthermore, when the rope is strongly pulled up, the weight comes into contact with the stopper, and the entire slurry sampler is suspended and pulled up. Then, when the sediment sampler is pulled up close to the water surface, if the valve holder is lowered to press down on the core fall prevention valve from above, the upper end of the core holder will be kept in a sealed state, allowing it to be lifted above the water surface. This prevents the deposits in the core holder from falling when the core holder is opened.

(Example) Hereinafter, an example of the present invention will be described using the drawings.

The figures show an embodiment of the driving-type mud collecting device according to the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part thereof, and FIG. 2 is a front view of the whole. Also, the third
The figure is an explanatory diagram of its usage state.

As is clear from Figures 1 and 2, this slurry collector 1
The whole has a vertically long column shape, and the core holder 2 is attached to the lower end of the column. This core holder 2 is made of acrylic resin or the like and has a transparent cylindrical shape, and both upper and lower ends thereof are open.
The upper end of the core holder 2 is fitted into the lower end opening of the core holder catcher 3 and fixed with a set screw 4.

The core holder catcher 3 is made of hollow metal and consists of three members: a lower core holder support 5, an intermediate valve support 6, and an upper cap 7, all of which are open at their lower ends. They are connected to each other by screws. The top wall of the core holder support 5 is provided with an opening 5a having an inner diameter approximately equal to the inner diameter of the core holder 2, and an O-ring 8 is attached to the upper end surface of the opening 5a. A disc-shaped core fall prevention valve 9 housed within the valve support 6 is placed on the O-ring 8 . And the valve stem 9a of the core drop prevention valve 9
is supported by the top wall 6a of the valve support 6 so as to be vertically movable. In this way, the core fall prevention valve 9
is supported inside the core holder catcher 3 so as to be vertically movable. Further, the upper end of the valve stem 9a is connected from the top wall 6a of the valve support 6 to the cap body 7.
It is made to protrude inside.

A plurality of openings 10, 10, ... and 11, 1 are provided in the top wall 6a and peripheral wall 6b of the valve support 6, respectively.
1,... are provided. On the other hand, the top wall 7a of the cap body 7 is relatively thick, and a screw hole 12 is provided in the center thereof. Further, the peripheral wall 7b of the cap body 7 is provided with a plurality of openings 13, 13, . . . .

Screw hole 1 provided in the top wall 7a of the cap body 7
2, the lower end of a long hollow support shaft 14 is screwed and fixed. A rod-shaped valve holder 15 is inserted into the support shaft 14 so as to be vertically movable. A laterally protruding pin 16 is attached to the upper end of the valve holder 15, and the pin 16 engages with a guide lug 17 provided on the peripheral wall of the support shaft 14. This guide groove 17 extends vertically and has a hook shape with a horizontally bent upper end, and a pin 16 is attached to the bent portion of the upper end.
When the pin 16 is engaged with the lower end of the guide groove 17, the lower end of the valve holder 15 is retracted into the support shaft 14 as shown by the solid line in FIG. The lower end of the valve holder 15 is adapted to come into contact with the upper end of the valve stem 9a of the core fall prevention valve 9 in the closed state, as shown by the imaginary line in the figure.

A metal weight 18 is provided above the core holder catcher 3. The weight 18 has a cylindrical shape, and a through hole is provided in the center of the weight 18, and a support shaft 14 is inserted into the through hole.
is inserted loosely. thus,
The weight 18 is movable up and down along the support shaft 14, and when lowered, the upper end surface of the core holder catcher 3, that is, the cap body 7, is at the top, as shown in FIG. It is adapted to abut against the wall 7a.

Both ends of a rope 19 are connected to the upper surface of the weight 18. Further, another long rope 20 is connected to the rope 19. In this way, the weight 18 can be pulled up by these ropes 19 and 20. and,
The raised position of the weight 18 is regulated by a bracket-shaped stopper 21 fixed to the support shaft 14. That is, when the weight 18 is raised to its upper limit, the upper end of the weight 18 comes into contact with the stopper 21, as shown in FIG. The stopper 21 is located sufficiently away from the upper end surface of the core holder catcher 3.

A bent plate-shaped blade 22 is provided at the upper end of the support shaft 14.
is attached parallel to the axis of the support shaft 14. Also, a bracket 2 is installed above the blade 22.
3 is installed. The rope 19 is inserted through the bracket 23 and the stopper 21.

Next, the operation of the slurry sampler 1 configured as described above will be explained.

When collecting sediment from the bottom of the water, use the valve holder 15.
With the pin 16 engaged with the bent portion of the upper end of the guide groove 17 and the valve holder 15 held in the upper position,
As shown in FIG. 3, the mud collector 1 is dropped from the boat 24. Then, because the center of gravity is located below and the blades 22 are provided on the upper end side, the mud collector 1 sinks in a substantially vertical state.
Usually, the lower end of the core holder 2 pierces the bottom sediment 25 and is held in a substantially vertical position.

Therefore, the weight 18 is pulled up using the ropes 19 and 20, and then the hand is released from the rope 20. Then, the weight 18 falls due to gravity and collides with the upper end surface of the core holder catcher 3. As a result, the core holder 2 is driven into the deposit 25 and an impact sound is emitted. This impact sound is caused by the depth of the water.
If it is within about 50m, it can be heard well even on the boat 24.

When the mud collecting device 1 does not properly deposit mud, for example, when it deposits mud in an overturned state, the weight 18 does not collide with the core holder catcher 3 even if the rope 20 is loosened. That is, no impact sound is emitted.
Therefore, by listening to the impact sound, it can be confirmed on the boat 24 whether or not the mud sampler 1 has properly deposited mud.

Then, when no impact sound is heard, the rope 20 is pulled up. Then, the mud collector 1 stands up. Then, the rope 20 is loosened and the weight 18 is dropped. Thereby, the weight 18 collides with the core holder catcher 3, causing the core holder 2 to collect the deposit 25.
As it gets hammered inside, an impact sound begins to be emitted.

In this way, even when the mud collector 1 does not deposit mud correctly, the mud collector 1 can be correctly positioned and confirmed by operating the rope 20 from the boat 24. Then, by repeatedly lifting and dropping the weight 18, the core holder 2
can be sufficiently driven into the deposit 25.

When the core holder 2 is driven into the deposit 25, the deposit 25 enters into the cylindrical core holder 2 through its lower end opening. At this time, the water filling the core holder 2 is pushed upward, and the core drop prevention valve 9 is pushed up and opened by the flow of water. Therefore, the water flows from the upper end opening 5a of the core holder support 5 to the valve support 6.
It flows out to the outside through the peripheral wall opening 11 of. During this time, the water above the core fall prevention valve 9 flows out through the peripheral wall opening 11 of the valve support 6 or through the top wall opening 10 and the peripheral wall opening 13 of the cap body 7, so the valve 9 opens very lightly. . Also,
Since the upper end opening 5a of the core holder support 5 is substantially continuous with the inner peripheral surface of the core holder 2, water flowing out from inside the core holder 2 is hardly squeezed. Therefore, the deposit 25, ie, the core, can be easily taken into the core holder 2.

In this manner, after the weight 18 is struck against the core holder catcher 3 several times to sufficiently drive the core holder 2, the rope 20 is strongly pulled up. Then,
The weight 18 is pulled up by the rope 19 and comes into contact with the stopper 21. Then, by being pulled up further by the ropes 19 and 20, the core holder 2 is pulled out from the bottom sediment 25, and the entire mud collector 1 comes to be suspended by the ropes 19 and 20. At this time, the core taken into the core holder 2 tries to fall, but if the core falls even a little, the inside of the core holder 2 becomes negative pressure. As a result, the core fall prevention valve 9 comes into close contact with the O-ring 8 attached to the upper end surface of the core holder support 5, and the upper end side of the core holder 2 is sealed. In this way, the core is prevented from falling. In water, water pressure is also applied to the top surface of the core fall prevention valve 9, so the valve 9 is
It is held in close contact with the ring 8.

When lifting the mud collector 1 onto the boat 24, when the vicinity of the stopper 21 appears above the water surface, the valve holder 15 is
move the pin 16 to the lower end side of the guide groove 17,
Lower the valve holder 15. Then, as shown by the imaginary line in FIG. 1, the lower end of the valve holder 15 comes into contact with the upper end of the valve stem 9a of the core fall prevention valve 9. Therefore, hold the pin 16 with your fingers,
If the valve holder 15 is held in that state,
The core drop prevention valve 9 is in close contact with the O-ring 8,
In other words, the valve is maintained in a closed state. In this way, even when the core drop prevention valve 9 is lifted into the air, a gap is created between the valve 9 and the O-ring 8, and air is surely prevented from entering the core holder 2 through the gap. This will prevent the core from falling.

After the entire mud collector 1 is lifted onto the boat 24 in this manner, the lower end of the core holder 2 is closed and the core holder 2 is removed from the core holder catcher 3. Then, the upper end of the core holder 2 is further closed. In this way, collection of the underwater sediment 25 is completed. When collecting deposits 25 continuously, another core holder 2 is attached to the core holder catcher 3.

In this way, by using the weight 18 that is moved up and down by the ropes 19 and 20, it is possible to confirm that the mud sampler 1 is properly loaded with mud, and to check the deposits on the core holder 2.
Effective insertion into the vessel 24 can be performed only by operation from on the boat 24. Also,
Since the core holder 2 is driven in by the weight 18, there is no need to increase the weight of the mud sampler 1.
It also becomes easier to handle. Furthermore, by having the structure that can be disassembled as described above, the slurry sampler 1 can be easily assembled on the boat 24, so that its transportation, storage, etc. are also facilitated. Further, by providing the valve holder 15 as described above, it becomes possible to reliably prevent the core from falling when lifted into the air, which was often seen in conventional columnar slurry collectors.

(Effect of the invention) As is clear from the above description, according to the invention, by dropping the core holder above the core holder catcher that supports the upper end part of the core holder, an impact is applied to the upper end surface of the core holder catcher. A weight that can be applied to the ground is installed, and the weight can be pulled up using a rope, so when the rope is operated from the boat to move the weight up and down, and the weight is dropped, there is no impact sound. You will be able to judge the state of sludge on the sludge sampler just by listening to whether or not the sludge is being emitted. Further, by repeatedly applying impact to the core holder catcher with the weight, the core holder is driven into the sediment on the bottom of the water. Therefore, even with a lightweight sediment collector, the core holder can be reliably inserted into the sediment, and bottom sediment can be collected efficiently.

In addition, the support shaft that guides the vertical movement of the weight is equipped with a stopper that restricts the rising position of the weight, so even if the mud sampler does not properly attach mud, the rope from the boat can be removed. By operating the rope, it becomes possible to fix it correctly, and it also becomes possible to pull it onto the boat with just one rope.

In addition, a core drop prevention valve that can be opened and closed on the upper end of the core holder is provided, and the core drop prevention valve can be kept closed with a valve holder, so that the collected underwater sediment can be It is possible to prevent mud vessels from falling when being lifted onto a boat.

Therefore, it is possible to obtain a sediment sampler that can reliably collect sediments from the bottom of the water by simple operation from a boat.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the main parts of an embodiment of the driving-type slurry extractor according to the present invention, Fig. 2 is a front view showing the overall structure of the slurry extractor, and Fig. 3 is a longitudinal sectional view of the main parts of an embodiment of the pump-type slurry extractor according to the present invention. It is an explanatory view showing the usage state of the clay pot. 1... Sludge sampler, 2... Core holder, 3... Core holder catcher, 9... Core fall prevention valve, 14
... Support shaft, 15 ... Valve holder, 18 ... Weight, 1
9,20... rope, 21... stoppa, 24...
...boat, 25...bottom sediment.

Claims (1)

[Claims for Utility Model Registration] A cylindrical core holder that is open at both upper and lower ends and whose lower end is driven into underwater sediment; a hollow core holder catcher into which the upper end of the core holder is fitted and fixed; a core fall prevention valve that is provided in the core holder catcher so as to be vertically movable and that can open and close the upper end side of the core holder; a support shaft that is attached to the upper end surface of the core holder catcher and extends upward; a weight that is movable up and down along a support shaft and that can apply an impact to the upper end surface of the core holder catcher when dropped; and a weight that is provided on the support shaft and regulates the ascending position of the weight. a stopper; a rope connected to the weight; and a rod-shaped rod that is movable up and down along the support shaft and that can press down the core drop prevention valve and hold it in a closed state by lowering it. A drive-in type sediment collector equipped with a valve holder and a.