JPS6313485Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a liquid tank for measuring specific gravity.

(b) Technical field A device that calculates the specific gravity of a solid sample from the ratio of its weight in air to its buoyant force when immersed in water. When suspended in a water tank, the water level in the tank changes depending on the volume of the sample. Therefore, the length of the underwater part of the weighing plate hanger changes and the buoyancy of this part is not constant. Therefore, it is necessary to correct the buoyancy of the hanger part for each sample, or to make sure that the length of the underwater part of the weighing plate is constant. Therefore, it is necessary to provide a means for adjusting the position of the water tank for each sample. Moreover, in order to perform buoyancy correction, the specific gravity of the suspension member must be known, and the means for adjusting the aquarium position has various mechanically difficult problems, making the entire device complicated. . In addition, since the outside surface of the water tank is in direct contact with the outside air, the water temperature may change significantly when measuring the specific gravity of many samples over a long period of time, so the water temperature must be constantly monitored. It is necessary to correct changes in specific gravity.

(c) Purpose The purpose of the present invention is to overcome the above-mentioned drawbacks in measuring the specific gravity of fixed substances, so that when a sample is suspended in water, the water level is always kept constant regardless of its volume. Provides a liquid tank for specific gravity measurement that is designed so that the length of the underwater part of the weighing plate hanger remains unchanged regardless of the size of the sample, and the influence of outside air temperature on water temperature is greatly suppressed. It's about doing.

(D) Structure In order to achieve the above object, the liquid tank for measuring specific gravity according to the present invention has an inner tank filled with liquid and an outer tank around the inner tank to store the liquid overflowing from the inner tank. The outer tank is characterized in that the outer tank is provided with a liquid draining means for draining the liquid to the outside when the liquid level in the outer tank reaches a predetermined level.

(e) Examples Examples of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing the structure of a liquid tank according to an embodiment of the present invention, and this figure also shows a state in which a sample is suspended in water in the liquid tank. The liquid tank has a double tank structure consisting of an inner tank 1 and an outer tank 2 having a common bottom 4, and a liquid overflow port 3 is provided at a predetermined height of the outer tank 2.
In this configuration, water is first filled only in the inner tank 1, and in order to measure the weight of the sample in water, the sample 10 placed on the weighing pan 11 of a scale (not shown) is suspended in the water. , the excluded water overflows from the inner tank 1 to the outer tank 2. When the water level in the outer tank 2 reaches the overflow port 3, the water is discharged to the outside from there. Therefore, regardless of the volume of sample 10 or the depth of immersion, the water level in inner tank 1 is always constant (depth of inner tank 1)
is maintained.

FIG. 2 is a sectional view showing the structure of another embodiment of the present invention. In this embodiment, water overflowing into the outer tank 2 is discharged to the outside through a drain pipe 5 connecting the bottom area of the outer tank 2 and the overflow port 3.

FIG. 3 is a sectional view showing the structure of yet another embodiment of the present invention. In this embodiment, inside the outer tank 2,
A partition wall 6 is provided rising from the bottom surface and surrounding the internal structure 1. A liquid circulation hole 7 is opened in the lower part of the partition wall 6, and the upper part is supported on the inner wall surface of the outer tank 2 by a ring-shaped support 8 over the entire circumference.

The invention can also be implemented in structures such as those shown in FIGS. 4 and 5. In the embodiment shown in FIG. 4, the liquid flow holes 7 in the partition wall in the embodiment shown in FIG. 3 are expanded over the entire circumference of the partition wall.
As a result, the partition wall 6 has a structure in which only the upper end portion is supported by the inner wall surface of the outer tank 2 by the ring-shaped support member 8. In the embodiment shown in FIG. 5, the inner tank and the outer tank do not have a common bottom, and a separately configured inner tank 1a is fitted and fixed into the outer tank 2a via a support 9. The overflow from the outer tank is discharged to the outside from the overflow port 3 through the drain pipe 5.

(F) Effect In either of the above configurations, as explained in connection with the explanation of the embodiment shown in Fig. 1, the water level in the inner tank is kept constant regardless of the volume of the specific gravity measurement sample. , when measuring the weight of the sample in water,
By holding the liquid tank at a predetermined height necessary to hold the sample completely within the inner tank, the length of the underwater portion of the scale's sample pan holder remains constant regardless of the sample volume. . Moreover, because the sides or sides and bottom of the inner tank are surrounded by part of the water used in the previous specific gravity measurement, the influence of outside air on the temperature of the water in the inner tank is greatly suppressed. Ru.
This effect is particularly noticeable in the case where drainage from the outer tank is carried out through the bottom of the outer tank, as in the embodiments shown in FIGS. 2, 3, 4 and 5.

As is clear from the above explanation, the present invention eliminates the need to correct changes in the buoyancy acting on the sample hanging device in response to the water level, which changes depending on the sample volume, and eliminates the need to compensate for changes in water temperature due to outside air. A liquid tank for measuring specific gravity with significantly suppressed specific gravity can be obtained.

[Brief explanation of the drawing]

All of the drawings in FIGS. 1 to 5 are cross-sectional views showing the structures of various embodiments of the present invention. 1...Inner tank, 2...Outer tank, 3...Overflow port, 5...
... Drain pipe, 6 ... Partition wall, 7 ... Opening, 8 ... Ring-shaped support, 9 ... Support stand, 10 ... Sample, 1
1...Sample plate, 12...Sample plate hanger.

Claims (1)

[Claims for Utility Model Registration] (1) A liquid tank used in an apparatus for measuring the weight of a solid sample in air and in a liquid to determine the specific gravity of the solid sample relative to the liquid, which is filled with the liquid. It consists of an inner tank and an outer tank that stores the liquid that overflows from the inner tank, and when the liquid level in the outer tank reaches a predetermined level, the liquid flows out to the outside. A liquid tank for specific gravity measurement, wherein the outer tank is provided with a liquid outflow means for measuring specific gravity. (2) A liquid tank for specific gravity measurement according to claim 1 of the utility model registration claim, characterized in that the liquid outflow means comprises a liquid overflow port provided at a predetermined height on the wall surface of the outer tank. . (3) The liquid for measuring specific gravity according to claim 1 of the utility model registration claim, wherein the liquid outflow means comprises a drainage pipe that connects the overflow port and the bottom space of the outer tank. Tank. (4) Utility model registration claim No. 1, characterized in that a partition wall having a liquid flow hole at the bottom and rising from the bottom of the outer tank surrounding the inner tank is provided in the outer tank. Liquid tank for measuring specific gravity according to item 2. (5) Specific gravity measurement according to claim 4 of the utility model registration claim, characterized in that the partition wall is supported on the wall surface of the outer tank via a ring-shaped support over the entire circumference at its upper end. liquid tank.