JP6869503B2 - Liquid sampling device - Google Patents

Description

The present invention relates to, for example, a liquid sampling device used when collecting water from a lake, river, or the like for water quality inspection.

Conventionally, it has been preferable that a liquid sample collected for a liquid inspection can be collected by a simple method. For example, the liquid sampling device of Patent Document 1 includes a bottomed tubular container having an opening, an annular cap that can be attached to and detached from the opening peripheral edge of the container, and a string-like body that suspends the cap, and is an inspection target. After immersing the container in the storage part where the liquid is stored to fill the container with the liquid sample, the liquid sample is collected by pulling up the string-like body.

When collecting a liquid sample using the liquid sampling device as described above, it is necessary to prevent foreign matter from being mixed. Therefore, for example, when the worker directly grips the liquid sampling device to perform the work, the worker needs to grip the string-like body to perform the work, and the worker directly grips the liquid sampling device to perform the work. When the work is not performed, it is necessary to suspend the container from a remotely controllable flying object or the like via a string-like body to perform the work.

Utility model registration No. 3108431

By the way, it is preferable that the container of the liquid sampling device is filled with a liquid sample without entraining air.

However, in the liquid sampling device of Patent Document 1, since the container is only suspended from the string-like body via the cap, the operator or the flying object operates the string-like body to put the container in the desired posture. It is difficult. Therefore, when a liquid sampling device is put into the storage section where the liquid to be inspected is stored, the container will take the liquid sample in a random posture, and the liquid sample will be collected with a lot of air entrained in the container. There is a risk of doing so.

In order to avoid this, it is conceivable to attach a control mechanism capable of remotely controlling the posture of the container to the liquid sampling device, but there is a problem that the cost increases and the weight increases.

The present invention has been made in view of these points, and an object of the present invention is that a liquid sample can be easily filled without entraining air in a container, and the liquid sample is lightweight and low in cost. The purpose is to provide a variety of liquid sampling equipment.

In order to achieve the above object, the present invention is characterized in that two types of weights are provided around the opening portion of the container in the liquid sampling instrument.

That is, in the first invention, a bottomed tubular container having an opening, a main body frame having an annular portion corresponding to the opening peripheral edge of the container, and the opening peripheral edge of the container can be attached to and detached from the annular portion. A string-like body for suspending the annular portion, an annular floating ring attached along the annular portion, and a container attached to both sides of the annular portion in the main body frame in the radial direction at a distance from each other. A first and second weights having a center of gravity located on the bottom surface side of the container are provided, and the first weight is set to be heavier than the container and the second weight.

The second invention is characterized in that, in the first invention, the center of gravity of the second weight is set to be located on the bottom surface side of the container with respect to the center of gravity of the first weight.

In the third invention, in the first or second invention, each of the first and second weights is configured so that the mounting position with respect to the main body frame can be changed in the direction of the cylinder center line of the container. It is a feature.

In the first invention, when the operator grips the string-shaped body or puts the instrument into the storage portion where the liquid to be inspected is collected with the string-shaped body attached to the flying body, the first weight becomes the container and the container. Since it is heavier than the second weight, the container floats on the liquid storage part with the first weight on the lower side of the container. At this time, the floating ring is located at the opening of the container, while the center of gravity of the first weight is located on the bottom surface side of the container with respect to the floating ring. Gradually sinks. When the lower end of the opening peripheral edge of the container reaches the liquid level of the storage part due to the gradual sinking of the container, the liquid of the storage part starts to flow into the container, so that the liquid of the storage part gradually fills the container from the bottom side of the container. Will be done. Then, the bottom side of the container gradually becomes heavier, so that the container gradually becomes upright while balancing the container with the first and second weights, and when the opening portion of the container is in an upward state, the inside of the container is reached. The liquid sample is filled with no air entrained in the container. In this way, when collecting a liquid sample, it is only necessary to put the instrument into the storage part where the liquid to be inspected to be collected is collected, and the operator operates the string-like body to collect the liquid in the container. It is not necessary to change the posture of the container or to change the posture of the container by operating the flying object to which the string-like body is attached, and the liquid collection work is simple. Further, since the water is allowed to flow into the container while changing the posture from the tilted posture to the upright posture, the liquid sample can be filled without entraining air in the container. Furthermore, since it is not necessary to provide a control mechanism for remotely controlling the attitude of the container in the liquid sampling device, the cost is not increased and the weight of the device is lightened, which imposes a load on the operator and the flying object during work. It can be difficult.

In the second invention, when the fluid of the storage portion starts to flow into the container and the posture of the container gradually changes, the weight balance of the first and second weights makes it easy for the container to rotate in the direction of standing upright in the storage portion. Become. Therefore, the posture changing operation of the container during the liquid sampling operation becomes smooth, and the liquid can be efficiently poured into the container.

In the third invention, the weight balance between the first weight and the second weight can be arbitrarily changed. Therefore, for example, the type and amount of the liquid sample to be collected are changed and the container is replaced with a different type. Then, the first weight and the second weight can be easily adjusted so as to have an optimum weight balance with respect to the replaced container.

It is a perspective view of the liquid sampling instrument which concerns on embodiment of this invention. It is an exploded perspective view of the liquid sampling instrument which concerns on embodiment of this invention. It is a cross-sectional view in line III-III of FIG. 1, and is the figure which shows the state just before taking a liquid sample. After FIG. 3, it is a figure which shows the state immediately after putting an instrument into the liquid storage part to be inspected. After FIG. 4, it is a figure which shows the state immediately after the liquid started to enter into the container of an instrument. After FIG. 5, it is a figure which shows the state in the process of collecting the liquid in the container of an instrument. After FIG. 6, it is a figure which shows the state which the container of an instrument is filled with a liquid.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is essentially merely an example.

FIG. 1 shows a liquid sampling device 1 according to an embodiment of the present invention. The liquid sampling device 1 is used when collecting a sample of water such as a lake or a river for water quality inspection, and is a resin container 2 filled with water to be inspected and a skeleton of the liquid sampling device 1. It is provided with a metal body frame 3.

As shown in FIG. 2, the container 2 has a short cylindrical mouth portion 2a having an opening, and a shoulder portion 2b that is continuously formed in the mouth portion 2a and gradually expands in diameter as the distance from the mouth portion 2a increases. A bottomed cylindrical body portion 2c formed continuously on the shoulder portion 2b is provided, and a male screw portion 2d is formed on the outer peripheral surface of the mouth portion 2a.

As shown in FIGS. 2 and 3, the main body frame 3 is provided on both sides in the radial direction of a short tubular annular frame 3a (annular portion) and one opening peripheral edge of the annular frame 3a. A pair of rod-shaped extension frames 3b extending in a direction away from each other with the center line in between, and a pair of substantially rectangular plate-shaped extension frames provided at the extending ends of the extension frames 3b and extending along the center line of the annular frame 3a. A support frame 3c is provided, and a plurality of mounting holes 3d are formed through the support frame 3c.

The annular frame 3a has an annular shape corresponding to the mouth portion 2a of the container 2, and a female screw portion 3e into which the male screw portion 2d of the mouth portion 2a can be screwed is formed on the inner surface thereof.

That is, the mouth portion 2a of the container 2 can be attached to and detached from the annular frame 3a.

An annular floating ring 4 is externally fitted to the annular frame 3a so as to be along the annular frame 3a, and the floating ring 4 is made of a porous urethane material.

To the one support frame 3c, a rectangular plate-shaped first metal weight 5 extending along the center line of the annular frame 3a is attached to the container 2 side attached to the annular frame 3a, and the first weight 5 is The position is close to the outer peripheral surface of the body portion 2c of the container 2.

A plurality of first through holes 5a are formed in the first weight 5, and the first through holes 5a and the mounting holes 3d of one of the support frames 3c are jointly tightened by using screws (not shown). One weight 5 is attached to one of the support frames 3c.

Further, the first weight 5 changes the mounting position with respect to the main body frame 3 by changing the co-tightening position of each first through hole 5a and each mounting hole 3d, so that the mounting position with respect to the main body frame 3 is set to the center of the cylinder of the container 2 mounted on the main body frame 3. It can be changed in the line direction.

Further, the first weight 5 is set to be heavier than the container 2 and the second weight 6 described later, and the center of gravity thereof is located on the bottom surface side of the container 2 with respect to the floating ring 4.

To the other support frame 3c, a rectangular plate-shaped metal second weight 6 extending along the center line of the annular frame 3a is attached to the container 2 side attached to the annular frame 3a, and the second weight 6 is The position is close to the outer peripheral surface of the body portion 2c of the container 2.

The plate thickness of the second weight 6 is set thinner than the plate thickness of the first weight 5, and the longitudinal dimension of the second weight 6 is set longer than the longitudinal dimension of the first weight 5. ing.

A plurality of second through holes 6a are formed in the second weight 6, and the second through holes 6a and the mounting holes 3d of the other support frame 3c are jointly tightened by using screws (not shown). The two weights 6 are attached to the other support frame 3c.

Further, the second weight 6 changes the mounting position with respect to the main body frame 3 by changing the co-tightening position of each of the second through holes 6a and each mounting hole 3d, so that the mounting position with respect to the main body frame 3 is set to the center of the cylinder of the container 2 mounted on the main body frame 3. It can be changed in the line direction.

Further, the second weight 6 is set to be heavier than the container 2, and its center of gravity is located on the bottom surface side of the container 2 with respect to the floating ring 4 and the first weight 5.

A string-shaped body 7 for suspending the liquid sampling device 1 is attached to the annular frame 3a.

The string-like body 7 is made of synthetic fibers such as nylon, and as shown in FIGS. 1 and 2, each end of the string-like body 7 is arranged so that the container 2 is in an upright posture when the liquid sampling device 1 is suspended in the air. It is fixed at a position biased toward the first weight 5 side.

Next, the work of collecting water from the water surface using the liquid sampling device 1 will be described in detail.

First, prepare a container 2 according to the amount of water to be collected and attach it to the main body frame 3.

Next, as shown in FIG. 1, the string-like body 7 of the liquid sampling device 1 is attached to the attachment portion 8 of the flying object (for example, a drone), and as shown in FIG. 3, the flying object is operated to collect the liquid. Float the instrument 1 in the air. At this time, since each end of the string-shaped body 7 is fixed at a position biased toward the first weight 5 in the annular frame 3a, the container 2 is in an upright posture.

After that, the flying object is lowered and the liquid sampling device 1 is thrown into the water surface. Then, since the first weight 5 is heavier than the container 2 and the second weight 6, the container 2 floats on the water surface with the first weight 5 on the lower side of the container 2, as shown in FIG. At this time, the floating ring 4 is located at the mouth 2a of the container 2, while the center of gravity of the first weight 5 is located closer to the bottom surface of the container 2 than the floating ring 4, so that the opening of the container 2 faces diagonally upward. The container 2 gradually sinks in such an inclined posture.

As shown in FIG. 5, when the lower end portion of the opening peripheral edge of the container 2 reaches the water surface due to the gradual sinking of the container 2, water starts to flow into the container 2 (arrow X1 in FIG. 5). Is gradually filled from the bottom surface side of the container 2. Then, as shown in FIG. 6, the amount of water flowing into the container 2 gradually increases, the water accumulates in the container 2 (arrow X2 in FIG. 6), and the bottom surface side of the container 2 gradually becomes heavier. While balancing the container 2 with the first weight 5 and the second weight 6, the container 2 gradually becomes an upright posture. Then, as shown in FIG. 7, when the opening portion of the container 2 is in an upward state, water is filled in the container 2 in a state where air is not entrained.

In this way, when collecting water from the water surface, it is only necessary to put the liquid sampling device 1 into the water surface, and it is necessary to operate the flying object to change the posture of the container 2 in order to collect water in the container 2. There is no water, and the water sampling work is easy.

Further, since the water is allowed to flow into the container 2 while changing the posture in which the container 2 is tilted to the upright posture, the water can be filled without entraining air in the container 2.

Further, since it is not necessary to provide the liquid sampling device 1 with a control mechanism for remotely controlling the attitude of the container 2, the cost is not increased, and the weight of the liquid sampling device 1 is also lightened, which puts a load on the flying object during work. It can be difficult to hang.

Further, since the center of gravity of the second weight 6 is set to be located on the bottom surface side of the container 2 with respect to the center of gravity of the first weight 5, when water starts to flow into the container 2 and the posture of the container 2 gradually changes, the first The weight balance between the 1st weight 5 and the 2nd weight 6 makes it easier for the container 2 to rotate in the direction in which the container 2 is in an upright posture in water (arrow Y1 in FIG. 6). Therefore, the posture changing operation of the container 2 during the water sampling operation becomes smooth, and the water can be efficiently poured into the container 2.

Further, since the first weight 5 and the second weight 6 are configured so that the mounting position with respect to the main body frame 3 can be changed in the direction of the cylinder center line of the container 2, the first weight 5 and the second weight 6 are combined. The weight balance between them can be changed arbitrarily. Therefore, for example, when the type and amount of the liquid sample to be collected are changed and the container 2 is replaced with a different type, the first weight 5 and the second weight 6 have an optimum weight balance with respect to the replaced container 2. It can be easily adjusted to be.

In the embodiment of the present invention, the liquid sampling device 1 is attached to the flying object to collect water on the water surface. However, the operator grips the string-shaped body 7 of the liquid sampling device 1 to collect the water on the water surface. It is also possible to carry out the collection work of.

Further, in the embodiment of the present invention, the liquid sampling device 1 is used to collect water on the water surface. However, the liquid sampling device 1 of the present invention is used to collect water from, for example, a lake, a river, or the sea. It can be performed. Further, even if the liquid to be inspected is a liquid food or the like in the manufacturing process, the liquid sampling device 1 of the present invention can be used for the sample sampling operation.

Further, in the embodiment of the present invention, the main body frame 3, the first weight 5 and the second weight 6 are made of a metal material, but they may be made of a resin material or the like.

The present invention is suitable, for example, for a liquid sampling device used when collecting water from a lake, river, or the like for water quality inspection.

1 Liquid sampling device 2 Container 3 Main body frame 3a Circular frame (annular part)
4 Floating ring 5 1st weight 6 2nd weight 7 String-shaped body

Claims (3)

A bottomed tubular container with an opening,
A main body frame having an annular portion corresponding to the opening peripheral edge of the container, and the opening peripheral edge of the container can be attached to and detached from the annular portion.
The string-like body that suspends the annular part and
An annular float attached along the annular portion and
It is provided with first and second weights which are attached to both sides of the annular portion of the main body frame in the radial direction and whose center of gravity is located on the bottom surface side of the container with respect to the floating ring.
The liquid sampling device is characterized in that the first weight is set heavier than the container and the second weight. In the liquid sampling device according to claim 1,
A liquid sampling instrument characterized in that the center of gravity of the second weight is set to be located on the bottom surface side of the container with respect to the center of gravity of the first weight. In the liquid sampling device according to claim 1 or 2.
The first and second weights are liquid sampling instruments, each of which is configured so that the mounting position with respect to the main body frame can be changed in the direction of the cylinder center line of the container.

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