JPH0618949U - Continuous sampling device for collected samples - Google Patents

Abstract

(57) [Summary] [Purpose] To measure the concentration and total weight of substances dissolved in a solvent, for example, the weight before evaporation of the solvent in the sample solution and the weight after evaporation of the solvent Provided is a device for continuously measuring weight and accuracy with high accuracy. A turntable having an opening, a driving means for rotating and vertically moving the turntable, and an upper end edge which is engaged with the upper surface of a body portion and an opening edge portion which are sized to fit in the opening and are supported. Bottomed cup-shaped sample container with an outwardly facing flange, weight measuring device and temperature adjustment,
A plurality of devices arranged for appropriate purposes such as heating and each having a mounting surface on which the sample container is mounted, and an upper moving position for performing the rotation of the turntable, and a mounting surface of each device. Provided so as to move the turntable up and down between a lower position below the position on which the sample container is mounted, and on the flange of the sample container, inside the opening of the turntable when the turntable is in the upper position. I will insert it,
A step portion is provided to be pulled out upward from the opening when the turntable descends to the lower position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for continuously measuring a sample to be collected, and more specifically, to evaporate and remove a solvent in a sample solution, for example, to measure the concentration or total weight of a substance dissolved in a solvent. The present invention relates to a continuous weighing device for sampling samples, etc., which can mechanically and automatically perform the operations of accurately measuring the weight before and after removing the solvent by evaporation.

[0002]

[Prior art]

 Generally, for the purpose of measuring the weight of a liquid collected from a certain solution, or measuring the concentration and total weight of substances dissolved in a solvent, the weight of the collected solution is measured or the solvent is collected from the collected solution. Conventionally, the operation of measuring the weight of the dissolved substance after performing an intermediate operation such as removal of the solvent is appropriately performed in a combination as necessary.

Then, when it is necessary to perform such an operation frequently or in large quantities, a device has been proposed in which the operation is continuously performed by using a work machine such as a robot.

For example, as an example of measuring the concentration or total weight of a substance in a solution, a container prepared on an XY table, that is, a container for filling a sample to be collected (hereinafter referred to as “sample container” or simply A "container") is grabbed by a robot arm for sample filling and moved to a sampling site to sample and fill the sample, and then the container is returned to the XY table, followed by an XY table. This container is transferred to a weighing balance and weighed. Furthermore, a vaporization removal device for concentrating and evaporating and removing the solvent is added to the container by moving the XY table for the pre-measurement of the weight of the dissolved substance. There is known a method and a device for performing a series of operations in which the container is moved, concentrated and removed by evaporation, and then the container is returned to the balance and the weight is measured again.

However, in the apparatus for carrying out this method, since the movement of the robot arm that performs the work is complicated, it is not easy to design the mechanical structure of the arm that enables this complicated movement and the logic that controls the movement. There is a problem. In addition to this, since it is necessary to move the container onto a balance etc. and completely free the container from the arm for weighing, it is necessary to move the container to the next step in the free process. Although it is necessary to perform the work of grasping the container in the state again with the robot arm, it is not always easy to perform this work with high precision by a mechanical device, and there is a problem that inconvenience accompanying this easily occurs. For example, considering the operation of placing the container on the balance and the operation of grasping the container on the balance, the position when grasping the container with the arm is more than that when placing the container on the balance. Since the position is naturally depressed by the weight of the container, it is necessary to adjust the position of the arm to grasp the container in the depressed position. However, the position of the container fluctuates depending on the amount of the liquid filled in the container and the like, so that there is a problem that it is not appropriate to control the fixed position by programming in advance.

[0006] As another problem, a shock caused by repeatedly placing and lifting a container on a balance for weight measurement and a shock other than that (for example, a shock that occurs during placing or lifting) is frequently given. This is a major problem that cannot be ignored when performing accurate weighing with a mechanical device in a stable manner over a long period of time.

As yet another problem, the sample container placed on the balance and the sample container placed on the solvent evaporation device become free from the robot arm that supports the container, and thus fall. Such problems cannot be ignored.

In view of the above points, instead of using a robot arm as a grasping tool, a turntable having a plurality of openings for receiving a container is used at the peripheral portion of a rotating disc, and the turntable is rotated, for example. There has also been proposed a device of a type in which the container is moved to an appropriate device such as a balance and the turntable is moved up and down at that position to release the support of the container on the balance.

[0009]

[Problems to be solved by the device]

 However, even with this method using a turntable, when the container is placed on the balance and the weight is measured, the side surface of the sample container touches the inner edge of the opening, making it difficult to perform accurate weight measurement on the balance. Is pointed out. That is, for example, when the body of a container having a large-diameter flange at the upper end is fitted and suspended from the top of an opening of a turntable having a diameter larger than the body and smaller than the flange, the container is generally offset. Since it is unavoidable, contact between the inner edge of the opening and the body of the container causes the above problem.

As described above, the conventional method described above is used when a fixed amount of a substance dissolved in a solvent is continuously sampled and the weight of the sample is measured, or when the total amount of the substance dissolved in the solvent is collected. In many cases, it is very inconvenient to carry out the work of continuously measuring the weight of the solvent after evaporating and removing the solvent, and it is often difficult to perform accurate measurement.

The inventors of the present invention have solved the problems in the conventional methods as described above, and for example, in order to collect a certain amount of a substance dissolved in a solvent together with a solvent and measure the collected weight, Alternatively, in order to measure the total amount of substances dissolved in the collected solvent, the work of measuring the weight of the solvent after evaporation and removal is carried out continuously and sequentially. The present invention has been made through extensive studies on a continuous measuring device for a sample that has a built-in balance and that can perform stable measurement without touching other parts even when measuring the weight on a balance. is there.

That is, an object of the present invention is to provide a turntable system, in which the weight can be continuously, stably and accurately measured only by providing a step on the engaging support of the turntable and the sample container. It is in the area of providing equipment.

Another object of the present invention is to adjust the condition in the constant temperature part when measuring the total amount of substances dissolved in a solvent and then measuring the weight after evaporating the solvent. An object of the present invention is to provide a device capable of measuring weight continuously and stably with high accuracy.

[0014]

[Means for Solving the Problems]

 The features of the continuous sample weighing device according to the present invention that achieves the above-mentioned object are that a turntable having one or a plurality of openings vertically penetrating the peripheral portion thereof and a first turntable for rotating the turntable. A driving means and a second driving means for moving up and down, and a bottomed cup shape that opens upward, and are carried by being engaged with the upper surface of the body and the edge of the opening that are dimensionally insertable into the opening. A sample container with an outwardly facing flange on the upper edge of the turntable, and a device for measuring the weight and at least one of them arranged underneath the turntable for appropriate purposes such as adjusting the temperature conditions. A plurality of devices each of which has a mounting surface on which the sample container is placed, and the sample container is provided by rotating the turntable by the first drive means. To A continuous sampling device for sampling samples provided so as to be transferred between a plurality of devices, wherein the second drive means is an upper movement position set as a position for performing the rotation of the turntable. And a lower position that is set as a position for lowering the turntable sufficiently below the position where the sample container is placed on the mounting surface of each of the above devices, and is provided to move the turntable up and down. At the same time, the flange of the sample container fits into the opening of the turntable when the turntable is in the upward movement position, but when the turntable descends to the downward movement position, it is pulled out upward from the opening. This is where the structure is provided so as to have a step.

In addition to the above configuration, a step portion having a small lower inner diameter and a large upper inner diameter is provided at the opening edge portion of the turntable, and the lower inner peripheral surface of the opening edge step portion faces the lower inner peripheral surface. The clearance between the outer peripheral surface of the sample container body is larger than the clearance between the upper inner peripheral surface of the opening edge step portion and the outer peripheral surface of the step portion of the sample container flange facing the opening inner peripheral surface, for example, It is also preferable to provide a size larger than 2 mm.

[0016]

【Example】

 Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of the structure of a continuous sample weighing apparatus of the present invention. As shown in detail in FIG. 1, 1 is a cylindrical cup-shaped container for storing the collected sample. This is a sample container, and an outer annular flange 12 is formed on the upper end edge of the cylindrical body portion 11, and the lower surface of the flange 12 has a diameter smaller than that of the flange 12 and the body portion. An annular step portion 13 having a diameter larger than 11 is provided.

Reference numeral 2 denotes a turntable, which is provided with a plurality of openings 21 in which the container 1 is fitted and inserted from above in a circumferentially spaced manner, and the flange 12 of the container 1 is carried at the edge of the opening 21. It is supposed to do. The turntable 2 is rotatably supported in a horizontal plane by a support shaft (not shown), and is also rotated by a predetermined amount arbitrarily set by a motor (not shown) which is a first driving means in a timely manner. A motor, which is also provided as a second driving means (not shown), moves up and down between an upper moving position for rotation and a lower moving position set at a certain length lower than the upper moving position. It is provided in. The relationship between the upper moving position and the lower moving position is shown by the dotted line (upper moving position) and the solid line (lower moving position) in FIG.

The turntable is controlled to drive rotation-lower movement- (processing such as weight measurement) -upper movement-rotation intermittently by driving each of the driving means by a control device (not shown). It

3 is a balance for measuring the weight of the sample to be sampled, 5 is a heater device for heating and evaporating and removing the solvent of the sample in the container, and 4 is the temperature of the sample container heated by the heater part. These are constant temperature devices that adjust the state of the vehicle. These are installed under the turntable at regular intervals.

The feature of this example is that the flange 12 of the sample container 1 is provided with the small-diameter step portion 13 as described above, and the cutout type is formed in the inner peripheral portion of the opening 21 of the turntable 2. The stepped concave portion 22 is provided, and the stepped portion 13 of the sample container and the stepped concave portion 22 of the turntable are provided in the following dimensional relationship.

That is, the size (diameter) of the opening 21 is not particularly limited when the sample container 1 is inserted and carried in the opening, but generally, the body portion 1 of the sample container 1 is not limited. 1 mm or more, preferably 2 mm or more in consideration of the fact that the sample container may slightly fluctuate on a balance or the like, and is provided in a dimensional relationship with a clearance d, while the step portion 13 of the sample container 13 The play e between the outer peripheral surface of the turntable and the side surface of the stepped recessed portion 22 of the turntable is provided in a relationship of e <d, preferably in a dimensional relationship of e−d = 1 mm or more.

Further, the depth a of the stepped concave portion 22 of the turntable is set sufficiently smaller than the stroke length i of the vertical movement of the turntable shown in FIG. 4, so that the turntable 2 is in the upward movement position. When the sample container 1 is carried, the step portion 13 is fitted into the stepped concave portion 22, and when the turntable 2 is lowered to the down position, it is pulled out upward from the stepped concave portion 22.

By setting the dimensional relationship between the play gaps d and e as described above (for example, the play gap e = 1 mm, d = 2 mm), the state in which the sample container 1 is carried on the turntable 2 (that is, In the state where the stepped portion 13 is fitted in the stepped recessed portion 22), even if the sample container is deviated within the range of the clearance e, the clearance d is less than 1 mm (de). It does not become narrow, and therefore, with the sample container 1 placed on a balance or the like and the turntable 2 lowered to the lower position, the inner edge of the opening 21 of the turntable and the body 11 of the sample container 2 A state is ensured in which there is no possibility of contact with.

The depth a of the stepped concave portion of the turntable is set so that the inner edge of the opening of the turntable and the side surface of the body of the sample container do not come into contact with each other when the sample container is carried and rotated as described above. The size of the sample container is not particularly limited because it is sufficient. However, in this example, by providing the size larger than the height of the step portion 13 of the sample container (generally, 2 mm or more), The large-diameter flange 12 of the sample container 1 is carried by the upper surface of the turntable 1. The depth a of the stepped recessed portion of the turntable may be set lower than the height of the stepped portion 13 of the sample container. In this case, the upper surface of the stepped recessed portion 22 carries a flange that carries the stepped portion 13 of the sample container. Will be the top surface. Therefore, in this case, it is not necessary to provide a protrusion protruding further outward from the stepped portion 13 of the sample container.

The dimensions b and c shown in FIG. 3 are not particularly limited, and in particular, if the container weight is supported by the upper surface of the turntable, the inward projection of the stepped portion at the inner edge of the opening described by b and c is Although not particularly required, it is preferable to perform the processing as shown in FIG. 3 in consideration of the guide assistance of the sample container.

It is preferable that the void portion of e is in such a state that the sample container and the turntable portion are in close contact with each other. From this point, it is preferable to limit the distance to 2 mm or less, but the condition of d> e is not satisfied. There is no particular limitation.

When neither the stepped portion 13 nor the stepped recessed portion 22 is provided, the sample container and a part of the turntable come into contact with each other when the weight is measured by the balance, and the weight measurement is performed accurately. Can not.

The step portion 13 of the sample container may be formed by setting a solvent resistant O-ring such as Viton on the sample container, but the O-ring may be extended if it is used for a long time. When the weight is measured on the balance, the O-ring and the turntable may come into contact with each other to cause a weight error. It is preferable to provide it.

The bottom of the sample container is preferably provided as horizontally as possible. This is because if the sample is placed on a balance when measuring the weight of the sample, and if it is placed on a heater when evaporating and removing the solvent, or after evaporating and removing the solvent, Considering placing the sample container on the heat retaining part to adjust the temperature of the sample container to a constant temperature, it is desirable from the viewpoint of stability of the sample container.

The sample container used in the present invention is made of a solvent resistant material used in ordinary chemical experiments and the like, and is not particularly limited as long as it is not corroded by the sample solvent to be collected. Heat-resistant glass or the like is preferably used, and any material can be used as long as it can be processed so as to be brought into close contact with the turntable.

Particularly when it is desired to observe the contents of the sample container, a heat-resistant glass is preferable, and a metal container made of aluminum or the like is preferable in consideration of heat conduction from the heater portion to evaporate and remove the solvent.

FIG. 3 is a cross-sectional view showing a state in which a sample container is placed on a turntable used in the continuous sampler weighing apparatus of the present invention.

The turntable may be made of a material used in a normal chemical experiment device, a physics and chemistry device, or the like.

As shown in FIG. 3, the opening shape for supporting the sample container of the turntable is normally provided in a circular shape. However, when the turntable moves, the sample container and the turntable come into contact with each other and a measurement error occurs in the weight measurement. A square or hexagonal shape may be used as long as it does not cause any problem, and the size and shape are not particularly limited as long as the sample container can be inserted and inserted.

FIG. 4 is a sectional view showing a state in which the sample container is placed on the balance using the sample container continuous measuring apparatus of the present invention.

Compared with a turntable used in a normal chemical experiment device or a physicochemical analysis device, the turntable has an inner edge of an opening portion into which a sample container is inserted and has the above-described special shape. Other than that, there is no particular change.For example, it is possible to move left and right by normal motor drive and up and down by air pressure operation.After moving the container in which the sample was taken to the position on the balance, The sample container can be placed on the balance by moving the turntable up and down. When placed on the balance in this way, the sample container on the balance is prevented from coming into contact with the turntable by the stepped portion on the inner edge of the opening and the stepped recessed portion of the flange of the sample container described in FIGS. 2 and 3. This enables stable weight measurement.

Also, when the sample container is removed from the balance, the turntable is pneumatically actuated to rise from below, and the sample container is lifted, so that the shock applied to the balance can be minimized.

The balance used here can be used without particular limitation, such as a precision balance used in ordinary chemical experiments.

FIG. 5 is a cross-sectional view showing a state in which the sample container is placed on a heat retaining device that adjusts the sample in the sample container used in the apparatus of this example to a constant temperature.

It is preferable that the surface of the heat retaining device that comes into contact with the bottom of the sample container is processed to be horizontal, which means that when the sample container is placed, the heat of the sample container is quickly removed to enhance the cooling effect. It is preferable from the viewpoint of adjusting the condition and stability of the sample container.

In addition, h and f are not particularly limited, but it is preferable that the h and f are processed so that the sample container can be put in when adjusting the condition.

In this case, it is necessary to set f> g, and h needs to be smaller than the amplitude i of the vertical movement of the turntable.

The material of the heat retaining part used in the present invention is not particularly limited as long as it does not break due to its weight when the sample container is placed, and it is used in a normal chemical experiment device or physicochemical device. It does not matter if it is made of a material. Metals such as copper, brass, and aluminum are preferable from the viewpoint of removing heat from the sample container and adjusting the state.

In consideration of the fact that the treatment is carried out successively in succession, it is preferable that the inside of the heat retaining portion is hollow and connected to the constant temperature water tank 6, and the constant temperature water whose temperature is adjusted to a constant temperature is circulated therein.

By using the device of the present example, a fixed amount of a substance dissolved in a solvent is sampled and the weight of the sample is measured, or the total amount of the substance dissolved in the sampled solvent is measured. After evaporating and removing the solvent, adjust the condition at a constant temperature, and then measure the weight in succession. It has a simple and highly stable operation, and weighs it on a balance. Also in this case, it is possible to perform stable and continuous accurate measurement without contact with other parts, and to obtain high quantitativeness with a simple operation.

[0047]

[Effect of device]

 According to the present invention described above, for example, a substance dissolved in a solvent is continuously sampled together with the solvent in a constant amount into a container and the weight of the sample is measured, or the substance dissolved in the sampled solvent is collected. When the weight is measured after the solvent is evaporated and removed to measure the total amount, the work is excellent in operability, and there is an effect that the workability can be performed without impairing the quantitativeness.

Further, by providing a heat retaining device under the turntable to adjust the temperature condition, there is an effect that the collected weight can be measured more stably.

Further, there is an effect that it can be easily incorporated into an apparatus or the like for automatically and continuously measuring the solvent extracted component.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a schematic configuration of a continuous sample weighing device according to the present invention,

FIG. 2 is a cross-sectional view of an example of a sample container used in the device,

FIG. 3 is a view for explaining a state in which the sample container is carried on a turntable,

FIG. 4 is a view showing a state in which a material container carried on the turntable is placed on a balance and the turntable is lowered to a lower position;

FIG. 5 is a view showing a state in which a material container carried on the turntable is placed on a heat retaining device and the turntable is lowered to a downward movement position. 1 ... Sample container, 2 ... Turntable, 3 ...
Insulation device, 4 ... Balance, 5 ... Heating device,
6 ... Constant temperature water tank.

Claims (3)

[Scope of utility model registration request] 1. A turntable having an opening penetrating in a vertical direction at a peripheral edge thereof, a first driving means for rotationally moving the turntable and a second driving means for vertically moving the turntable, and the upper opening. A sample container having a cup shape with a bottom and having a body portion having a size that can be inserted into the opening and an outward flange of an upper end edge that is carried by being engaged with the upper surface of the opening edge portion, and a And a mounting surface on which at least one or more devices arranged under the turntable for appropriate purposes such as temperature control, heating, etc. are combined, and on which the sample containers are placed, respectively. And a plurality of devices each having a plurality of devices, and a continuous meter for sampling samples provided so as to transfer the sample container between the plurality of devices by rotating the turntable by the first driving means. In the measuring device, the second driving means is sufficiently lower than the upper moving position set as the position for rotating the turntable and the position where the sample container is mounted on the mounting surface of each device. It is provided so as to move the turntable up and down between a lower position set as a position for lowering the turntable, and the flange of the sample container has a flange when the turntable is in the upper position. A continuous measuring device for a sample or the like, which is fitted in the opening of the turntable, and is provided with a step portion that is pulled out upward from the opening when the turntable descends to a lower position. 2. The turntable opening edge portion according to claim 1, wherein a step portion having a small lower inside diameter and a large upper inside diameter is provided, and the step portion having a lower inside diameter and a lower inside peripheral surface facing the opening edge step portion. The clearance between the outer peripheral surface of the sample container body is larger than the clearance between the upper inner peripheral surface of the opening edge step portion and the step outer peripheral surface of the sample container flange facing the upper inner peripheral surface. Continuous measuring device for samples and the like. 3. The apparatus according to claim 1 or 2, wherein the device arranged below the turntable is a balance, a heating device for removing the solvent in the sample container by evaporation, and a heat retaining device for adjusting the temperature condition. A continuous measuring device for characteristic samples.