KR101516182B1 - Basket and apparatus for fluid sampling using the same - Google Patents

Abstract

The fluid sampling device according to the present invention includes a storage pit in which an opening is formed in an upper surface and a space for storing a fluid is formed therein, A basket for collecting the fluid inside the storage pit and capable of being raised and lowered along the lifting guide and a lifting part for lifting the basket up and down along the lifting guide, A bottom surface and a bottom surface for opening and closing the fluid inflow hole, the fluid in the storage pit opening through the fluid inflow hole to the inside of the basket during opening of the fluid inflow hole while the basket is taking the fluid And the basket is lifted up along the lifting guide toward the opening And an opening / closing part for closing the fluid inlet hole to prevent the fluid introduced into the basket from flowing out.

Description

[0001] BASKET AND FLUID SAMPLING USING THE SAME [0002]

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a basket and a fluid sampling device including the basket, and more particularly to a basket for sampling fluid through the bottom of a basket and a fluid sampling device including the same.

Filling of a part of the fluid in a separate container to examine the stored fluid or components of the flowing fluid is called fluid sampling. Since a conventional container has a shape in which an inlet is formed at an upper portion thereof, in order to sample a fluid, the container inlet is submerged in a state where the container is laid down, so that fluid flows into the container.

In particular, in order to sample a fluid stored in a storage tank, an operator lowers the basket from the storage tank to the rope and drops the fluid into the storage tank. In the course of fluid sampling, the operator moves the rope so that the fluid flows into the basket, manipulating the basket to lie on the fluid surface, often resulting in a safety accident, such as an operator stumbling, Occasionally, the basket is lost.

In particular, there is a mud pit that separates and stores the mud from the rock fragments and mud that occur during drilling operation in the drill ship drilling the seabed resource. The mud stored in the mud pit is used for lubrication and cooling of the drill bit, and the used mud is stored again in the mud pit and reused. At this time, to check whether the mud stored in the mud pit is suitable for reuse, a part of the stored mud is sampled to check the weight and viscosity of the mud. As described above, when collecting the mud in the mud pit, the operator also collects the mud in the mud pit using the roped basket.

On the other hand, a stirrer is installed in the mud pit to prevent the mud from hardening. When the operator loses the rope and loses the roped basket into the mud pit during mud sampling, the rope is wound on the stirrer A problem such as stopping the stirrer occurs additionally.

KR 20-0118410 Y1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a basket capable of collecting fluid through the bottom of a basket during a fluid sampling process and a fluid sampling device using the same.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a fluid sampling device including: a storage pit having an opening formed on an upper surface thereof and having a space for storing a fluid therein; one side of the storage pit is located inside the opening; And a lifting unit for lifting the basket up and down along the lifting guide, and a lifting unit for lifting the lifting unit along the lifting guide, Wherein the basket is provided on a bottom surface on which a fluid inlet hole is formed and on a bottom surface for opening and closing the fluid inlet hole so as to open the fluid inlet hole while the basket picks up the fluid, Into the basket through the inflow hole, and the basket is moved toward the opening And an opening / closing part for closing the fluid inlet hole to prevent the fluid introduced into the basket from flowing out while the lifting guide is lifted.

According to another aspect of the present invention, there is provided a basket comprising: a bottom surface having a fluid inflow hole formed therein; a fluid passage formed in the bottom surface to receive a fluid flowing through the fluid inflow hole together with the bottom surface; And an open / close plate provided in the receiving space and opening / closing the fluid inflow hole by an upward or downward movement.

Other specific details of the invention are included in the detailed description and drawings.

The embodiments of the present invention have at least the following effects.

Fluid can be contained in the basket by simply lowering and lifting the basket into the fluid without having to lie down on the basket during the fluid sampling process.

It also eliminates the need for the operator to lie down on the basket with the rope to contain the fluid into the basket, thereby preventing safety accidents and basket loss.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a perspective view showing a fluid sampling device according to an embodiment of the present invention;
2 is a plan view of a fluid sampling device according to an embodiment of the present invention;
3 and 4 are schematic cross-sectional views illustrating a basket according to a first embodiment of the present invention;
5 and 6 are schematic cross-sectional views illustrating a basket according to a second embodiment of the present invention;
7 and 8 are schematic cross-sectional views illustrating a basket according to a third embodiment of the present invention;
9 to 12 are views showing a process of collecting fluid using the basket according to the first embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Further, the embodiments described herein will be described with reference to cross-sectional views and / or schematic drawings that are ideal illustrations of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. In addition, in the drawings of the present invention, each component may be somewhat enlarged or reduced in view of convenience of explanation. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a basket and a fluid sampling device using the basket according to an embodiment of the present invention.

FIG. 1 is a perspective view showing a fluid sampling device according to an embodiment of the present invention, and FIG. 2 is a plan view showing a fluid sampling device according to an embodiment of the present invention.

1 and 2, a fluid sampling device 1 according to an embodiment of the present invention includes a storage pit 10, an elevation guide 20, a lift 30, and a basket 100 do.

The storage pit 10 has a space for storing a fluid therein and includes an opening 10a on its upper surface. The storage pit 10 may be installed to be buried in the ground, installed on the ground, or installed on a ship which drills the resources of the seabed. In the case of being installed to be buried in the ground, the opening 10a may be buried so as to be exposed on the ground. In case of being installed on the ground, a ladder or the like connecting the ground and the upper surface may be installed. When installed on a ship, it may be installed so that the deck of the ship and the upper surface coincide with each other. The fluid stored in the storage pit 10 when installed on a vessel may comprise a mud taken from the sea bed.

On the other hand, the elevation guide 20 includes a guide bar 21, a guide block 22 and a wire support bar 26.

The guide bar 21 may be provided such that one side thereof is located inside the opening 10a and the other side thereof is located inside the storage pit 10. The other side of the guide bar 21 may be fixed to the bottom of the storage pit 10. As shown in FIGS. 1 and 2, the guide bars 21 may be provided such that a pair of the guide bars 21 are opposed to each other on both sides of the opening 10a. Alternatively, although not shown, a single guide bar may be provided. A guide bar 21 is provided so as to be adjacent to a sidewall of the sidewall of the basket 100 to be described later so as to smoothly raise the basket 100 from which the fluid is collected, , But the installation position of the guide bar 21 is not limited thereto.

A wire support bar 26 is provided at one side of the guide bar 21. The wire support bar 26 supports the wire 32 connecting the basket 100 and the elevator 31 to be described later and prevents the wire 32 from unnecessarily rubbing against other components. The wire support bar 26 may be rotatably mounted relative to the guide bar 21 to minimize wear of the wire support bar 26 in the process of lifting the bar 100 .

The guide block 22 supports the side wall of the basket 100 to be described later, and is vertically movable along the guide bar 21. In other words, the basket 100 can be moved up and down by the guide block 22 which moves up and down along the guide bar 21. The guide bar 21 is formed in a shape similar to that of the U-shaped cross section, and the guide block 22 is inserted into a concave recessed portion and can move up and down along the guide bar 21.

The guide block 22 may be installed so as not to be detached from the guide bar 21. In this case, it is preferable that the guide block 22 is formed so as to be freely attached and detached between the basket 100 and the guide block 22. [ Or the guide block 22 may be coupled to the side wall of the basket 100 so that the basket 100 and the guide block 22 are integrally attached to and detached from the guide bar 21. [

On the other hand, the elevating portion 30 includes an elevator 31 and a wire 32.

One end of the wire 32 may be coupled to the elevator 31 and the other end may be coupled to the basket 100. The wire 32 is made of a member that is deformable so as to be easily bent by the wire support bar 26 and can withstand the tension acting on both sides.

The elevator 31 pulls the wire 32 to raise the basket 100 connected to the wire 32 and unwind the wire 32 so that the basket 100 connected to the wire 32 can be lowered by gravity . One example of the elevator 31 is a winch that rotates in one direction and winds the wire 32 to raise the bar 100 and rotates the other direction to unroll the wire 32 to lower the bar 100 have.

Hereinafter, a basket according to an embodiment of the present invention will be described.

3 and 4 are schematic cross-sectional views illustrating a basket according to a first embodiment of the present invention.

3 and 4, the basket 100 according to the first embodiment of the present invention includes the side wall 11, the bottom surface 12, and the opening and closing portions 13, 14, 15, 16 do.

The bottom surface 12 is formed with a fluid inflow hole 12a penetrating the bottom surface 12. The side wall 11 extends from the edge of the bottom surface 12 and forms a closed loop shape, 12 to form a receiving space capable of accommodating the fluid. Although the side wall 11 having a quadrangular closed loop shape is shown in FIGS. 1 and 2, the shape of the side wall 11 is not limited to this, and may have various closed loop shapes such as a polygonal shape, a circular shape, and a polygonal shape.

On the other hand, the opening and closing part includes an opening and closing plate 13, an opening and closing guide 15, a latching jaw 16 and a sealing member 14.

The opening / closing plate 13 is provided at an upper portion of the fluid inlet hole 12a. It is preferable that the open / close plate 13 has a plate shape with a flat bottom surface so as to be lifted by the buoyant force of the fluid.

The opening and closing plate 13 is formed to have a sufficient size to close the fluid inlet hole 12a and is formed with a width or diameter larger than the width or the diameter of the fluid inlet hole 12a. 3, when the open / close plate 13 closes the fluid inflow hole 12a, the front surface of the fluid inflow hole 12a and the edge of the fluid inflow hole 12a can be covered at the same time.

Although not shown, the opening / closing plate 13 may be formed to be partially inserted into the fluid inlet hole 12a, thereby further improving the effect of closing the fluid inlet hole 12a.

The opening and closing guide 15 may extend from the lower surface of the opening and closing plate 13 and penetrate the fluid inlet hole 12a. The opening and closing guide 15 guides the lifting and lowering of the opening and closing plate 13 so that the opening and closing plate 13 is not separated from the upper portion of the fluid inflow hole 12a when the opening and closing plate 13 is raised or lowered.

The stopping jaw 16 is bent outward from the end of the opening 15a exposed to the lower portion of the fluid inflow hole 12a so that at least a part of the stopping jaw 16 is bent 100) of the bottom surface (12).

4, when the open / close plate 13 rises for a certain distance or more from the fluid inflow hole 12a, the engagement protrusion 16 contacts the bottom surface 12 and restricts the rise of the open / close plate 13 do.

A sealing member 14 may be provided on the bottom surface of the opening and closing plate 13. As the sealing member 14, an O-ring formed of an elastic material such as rubber or silicone may be used.

The sealing member 14 is provided between the opening and closing plate 13 and the bottom surface 12 so that the opening and closing plate 13 enters the accommodation space through the fluid inflow hole 12a in a state in which the fluid inflow hole 12a is closed Thereby more effectively blocking the flow of the fluid through the fluid inlet hole 12a.

The bottom surface 12 may be formed with a sealing groove 12b in which a part of the sealing member 14 can be received.

3 and 4 show that the sealing member 14 is installed on the bottom surface of the opening and closing plate 13, the sealing member 14 may be provided on the bottom surface 12, It is possible to obtain the same effect as in the case of being provided on the bottom surface of the open / close plate 13. [ In this case, a sealing groove 12b in which a part of the sealing member 14 can be received may be formed on the bottom surface of the opening and closing plate 13.

The operation of the basket 100 according to the first embodiment of the present invention will be described with reference to Figs. 3 and 4. Fig. Fig. 3 shows a state in which the fluid inflow hole 12a is closed by the open / close plate 13, and Fig. 4 shows a state in which the fluid inflow hole 12a is opened by the open /

3, when the open / close plate 13 closes the fluid inflow hole 12a, the open / close plate 13 covers the front surface of the fluid inflow hole 12a and the edge of the fluid inflow hole 12a at the same time Lt; / RTI >

Closing plate 13 and the bottom surface 12 are brought into close contact with each other by the load of the fluid and the sealing member 14 positioned between the opening and closing plate 13 and the bottom surface 12, Thereby preventing the fluid in the accommodation space from flowing out through the fluid inflow hole 12a.

When the open / close plate 13 is brought into contact with the fluid in the absence of the fluid in the accommodation space, as shown in FIG. 4, the open / close plate 13 is raised by the buoyancy and the fluid inflow hole 12a is opened And the fluid enters the receiving space through the fluid inlet hole 12a.

As the fluid enters the receiving space through the fluid inlet hole 12a, the basket 100 is further submerged into the fluid, so that the opening and closing plate 13 gradually rises. ), It ceases to rise any more.

Hereinafter, a basket according to a second embodiment of the present invention will be described.

5 and 6 are schematic cross-sectional views illustrating a basket according to a second embodiment of the present invention. For convenience of description, the same reference numerals are used for the components similar to those of the first embodiment, and a description of components common to the first embodiment will be omitted.

5 and 6, the basket 200 according to the present embodiment is different from the basket 100 according to the first embodiment in that the open / close plate 23 is provided in the fluid inflow hole 12a, The open / close plate 23 is inserted into the fluid inlet hole 12a.

For this purpose, the outer shape of the opening / closing plate 23 may be formed to correspond to the fluid inlet hole 12a. As shown in FIGS. 5 and 6, a recess 23a is formed at the edge of the opening / closing plate 23 so as to form a recess. Corresponding to this, the fluid inlet hole 12a is provided with a protruding end 12c protruding inwardly forming a step.

The sealing member 24 may be provided at the recessed end 23a of the opening and closing plate 23 so as to be positioned between the recessed end 23a and the protruded end 12c. Or the sealing member 24 may be provided on the protruding end 12c so as to be positioned between the recessed end 23a and the protruding end 12c.

In the case of this embodiment, it is similar to the basket 100 according to the first embodiment that the rise of the open / close plate 23 is restricted by the guide guided by the open / close guide 15 and the engaging jaws 16. However, in the basket 100 according to the first embodiment, the open / close plate 13 is formed so as to simultaneously cover the front surface of the fluid inflow hole 12a and the edge of the fluid inflow hole 12a so that the open / The opening and closing plate 23 is inserted into the fluid inflow hole 12a to close the fluid inflow hole 12a in the present embodiment, The protruding end 12c prevents the opening / closing plate 23 from being released to the outside of the basket 100.

The operation of the basket 200 according to the second embodiment of the present invention will be described with reference to Figs. 5 and 6. Fig. 5 shows a state in which the fluid inflow hole 12a is closed by the open / close plate 23, and FIG. 6 shows a state in which the fluid inflow hole 12a is opened by the open / close plate 23.

5, when the open / close plate 23 closes the fluid inflow hole 12a, at least a part of the open / close plate 23 is inserted into the fluid inflow hole 12a.

When the fluid is present in the accommodation space, the recess 23a and the protruding end 12c are brought into closer contact with each other by the load of the fluid, and the sealing member 24, which is located between the recess 23a and the protruding end 12c, Thereby preventing the fluid in the accommodation space from flowing out through the fluid inflow hole 12a.

When the open / close plate 23 is brought into contact with the fluid in the absence of the fluid in the accommodation space, as shown in FIG. 6, the open / close plate 23 is raised by buoyancy and the fluid inflow hole 12a is opened And the fluid enters the receiving space through the fluid inlet hole 12a.

As the fluid enters the receiving space through the fluid inlet hole 12a, the basket 100 is further submerged into the fluid, so that the open / close plate 23 gradually rises. ), It ceases to rise any more.

Hereinafter, a basket according to a third embodiment of the present invention will be described.

7 and 8 are schematic cross-sectional views illustrating a basket according to a third embodiment of the present invention. For convenience of description, the same reference numerals are used for the components similar to those of the first embodiment, and a description of components common to the first embodiment will be omitted.

7 and 8, the basket 300 according to the present embodiment is different from the basket 100 according to the first embodiment in that the open / close guide 35 and the engagement jaw 36 And is provided inside the accommodation space.

That is, the open / close guide 35 protrudes from the bottom surface toward the accommodation space inside the basket. The opening and closing guide 35 is provided at the edge of the opening and closing plate 33 to support the opening and closing plate 33 in a lateral direction and guide the rising and falling of the opening and closing plate 33.

Further, the latching jaw 36 is formed so as to be bent inward from the end of the opening / closing guide 35 so as to limit the rise of the opening / closing plate 33.

The operation of the basket 300 according to the third embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 shows a state in which the fluid inflow hole 12a is closed by the open / close plate 33, and Fig. 8 shows a state in which the fluid inflow hole 12a is opened by the open / close plate 33. Fig.

As shown in FIG. 7, when the open / close plate 33 closes the fluid inlet hole 12a, the description of the basket 100 according to the first embodiment of the present invention is omitted. .

When the open / close plate 33 is brought into contact with the fluid in the absence of the fluid in the accommodation space, as shown in FIG. 8, the open / close plate 33 is raised by buoyancy and the fluid inflow hole 12a is opened And the fluid enters the receiving space through the fluid inlet hole 12a.

As the fluid enters the receiving space through the fluid inlet hole 12a, the basket 300 is further submerged into the fluid, so that the open / close plate 33 gradually rises along the opening / closing guide 35, 36), it ceases to rise further.

Hereinafter, a process of collecting fluid using a fluid sampling device according to an embodiment of the present invention will be described.

9 to 12 are views showing a process of collecting fluid using the basket according to the first embodiment of the present invention. The basket 100 according to the first embodiment of the present invention will be described as an example to avoid redundant description and the basket 200 according to the second embodiment and the basket 300 according to the third embodiment will be described. The fluid sampling can be understood through the operation of the basket according to each of the above-described embodiments and the fluid sampling using the basket according to the first embodiment of the present invention described below.

Fig. 9 shows a state in which the basket 100 having an empty space for receiving a fluid sample is sent down to the storage pit 10.

As shown in Fig. 9, the basket 100 is supported by a wire 32 in the load direction and laterally supported by a guide block 22, and enters a pair of guide bars 21.

As the elevator 31 (see FIG. 1) unwinds the wire, the basket 100 descends into the storage pit 10 along the pair of guide bars 21. At this time, the opening / closing plate 13 may be in a state in which the fluid inflow hole 12a is closed by its own weight.

10 shows a state in which the open / close plate 13 rises and starts to open the fluid inflow hole 12a.

10, when the basket 100 is continuously lowered and the open / close plate 13 is brought into contact with the fluid stored in the storage pit 10, the open / close plate 13 is raised by buoyancy, The opening and closing guide 15 and the latching jaw 16 are also lifted together with the latch 13.

As the basket 100 further descends, the fluid enters the receiving space through the open fluid inflow hole 12a.

Fig. 11 shows a state in which the opening and closing plate 13 has stopped rising by the latching jaws 16. Fig.

As shown in FIG. 11, as the fluid flows into the receiving space in the basket 100 and the basket 100 continues to descend, the open / close plate 13 ascends by a certain height from the fluid inflow hole 12a, The stopper 16 comes into contact with the bottom surface 12 to prevent the opening / closing plate 13 from rising.

When the basket 100 continues to descend, the fluid flows into the accommodation space beyond the height of the open / close plate 13.

Fig. 12 shows a state in which the basket 100 holding a predetermined amount of fluid rises toward the opening 10a of the storage pit 10.

12, when a predetermined amount of fluid flows into the receiving space in the basket 100, the elevator 31 pulls the wire 32 to raise the basket 100 connected to the wire 32 .

The opening and closing plate 13 is lowered to close the fluid inflow hole 12a by inertia and descent of the fluid in the accommodation space as the elevator 31 pulls the wire 32 down. At this time, the sealing member 14 provided between the opening / closing plate 13 and the bottom surface 12 can more effectively block the fluid in the receiving space from flowing out through the fluid inlet hole 12a.

As the elevator 31 continuously pulls the wire 32, the basket 100 is lifted along the guide bar 21 and finally placed in the opening 10a

The basket 100 rising to the opening 10a is separated from the guide bar 21 to complete the fluid sampling in the storage pit 10.

As described above, the fluid sampling device 1 according to the embodiment of the present invention uses the baskets 100, 200, and 300 for introducing the fluid through the lower part, A certain amount of fluid can be collected.

Therefore, it is not necessary to operate the basket by using the rope in order to lay down the basket on which the worker floats on the fluid, as in the conventional fluid sampling. At the same time, safety accidents that may be caused thereby can be prevented, 10 to prevent the basket from being lost.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: fluid sampling device 10: storage pit
10a: opening 11: side wall
12: bottom surface 12a: fluid inflow hole
12b: sealing groove 12c: protruding end
13, 23, 33: open / close plate 14, 24, 34: sealing member
15, 35: opening and closing guide 16, 36:
20: elevation guide 21: guide bar
22: guide block 23a:
26: wire support bar 30:
31: elevator 32: wire
100, 200, 300: Basket

Claims (10)

A storage pit in which an opening is formed in an upper surface and a space for storing a fluid is formed therein;
A lifting guide having one side positioned inside the opening and the other side positioned inside the storage pit;
A basket which is movable up and down along the lifting guide to collect the fluid inside the storage pit; And
And an elevating portion for elevating and descending the basket along the elevation guide,
In the basket,
A bottom surface having a fluid inlet hole and
Wherein the fluid inlet hole is opened on the bottom surface to open and close the fluid inlet hole so that fluid in the storage pit flows into the basket through the fluid inlet hole while the basket is collecting the fluid, And an opening / closing plate for closing the fluid inlet hole to prevent the fluid flowing into the basket from flowing out while the basket is lifted along the lifting guide toward the opening,
Wherein the opening / closing plate is formed to correspond to the fluid inlet hole, and when the fluid inlet hole is closed, at least a part of the opening / closing plate is inserted into the fluid inlet hole,
Wherein a protrusion is formed on the inner side of the fluid inflow hole so as to correspond to the depressed end and protruded to limit the descent of the opening and closing plate, Fluid sampling device. The method according to claim 1,
Wherein the open / close plate opens the fluid inflow hole by a predetermined distance from the bottom surface by using buoyancy by the fluid during the taking of the fluid, and the basket is lifted along the lifting guide toward the opening, And closes the fluid inflow hole by self-weight of the fluid that has flowed into the basket. The method according to claim 1,
In the basket,
An opening and closing guide extending from a lower surface of the opening and closing plate to penetrate the fluid inlet hole and guiding the lifting and lowering of the opening and closing plate,
And a locking jaw that is bent from an end of the open / close guide to restrain the rise of the open / close plate so as to be positioned below the bottom surface. delete delete The method according to claim 1,
In the basket,
An opening / closing guide protruding from the bottom surface toward the inside of the basket and provided at an edge of the opening / closing plate to guide the lifting / lowering of the opening / closing plate; And
And a locking jaw that is bent from an end of the open / close guide so as to be positioned at an upper portion of the open / close plate and limits the rise of the open / close plate. The method according to claim 1,
Wherein the storage pit is provided on a vessel that sails the resources of the seabed, and wherein the fluid comprises a mud taken from the seabed. A bottom surface having a fluid inlet hole formed therein;
A sidewall formed in the shape of a closed loop extending from the bottom surface to form a receiving space for receiving fluid flowing through the fluid inflow hole together with the bottom surface; And
And an opening / closing plate provided in the accommodating space and opening / closing the fluid inflow hole by an upward or downward movement,
Wherein the opening / closing plate is formed to correspond to the fluid inlet hole, and when the fluid inlet hole is closed, at least a part of the opening / closing plate is inserted into the fluid inlet hole,
Wherein a protrusion is formed on the inner side of the fluid inflow hole so as to correspond to the depressed end and protruded to limit the descent of the opening and closing plate, Baskets. 9. The method of claim 8,
Wherein the open / close plate rises using buoyancy of fluid existing outside the basket to open the fluid inflow hole. 9. The method of claim 8,
Wherein the opening / closing plate is lowered by the self weight of the fluid introduced into the accommodating space and closes the fluid inflow hole.

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