JPH09288103A - Testing apparatus for undissolved portion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing apparatus which reduces irregularity in a measured result, by which a high-accuracy and high-reliability test result can be obtained in a short time an which prevents a solvent or the like from being leaked to the outside. SOLUTION: A plurality of pores 33 are made, toward the inside wall of a test tube 1, in the tip part of a liquid injection nozzle 32 by which a solvent is injected into the test tube 1 from a liquid injection tank 30. Then, a testing apparatus is constituted in such a way that, when the solvent is injected into the test tube 1, a packing 22 is attached to the peripheral edge at the lower part of an opening part in a stopper 20 which positions the test tube 1 in its height direction and that a cap 40 whose shape is identical to the shape of the opening part in the stopper is attached to the liquid injection nozzle 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically testing insoluble matter in petroleum products such as lubricating oil, and more particularly to an insoluble matter testing apparatus having an improved portion used in a solvent injection process. .

[0002]

2. Description of the Related Art In petroleum products such as lubricating oils used, insoluble matter tests are carried out regularly or as needed in order to measure the degree of deterioration, pollution degree and the like of the lubricating oils. This insoluble matter test complies with the Japan Petroleum Institute test method JPI-5S prepared by using the ASTM D893 method as a base material. There are two methods, one is to know the amount, and the other is to know the amount of fine insoluble matter suspended in oil by adding a coagulant to the solvent.

On the other hand, in recent years, since the performance of diesel engines and the workability of metal processed products have improved, the insoluble content test as a lubricating oil control item has become an important test item, and the test frequency Is increasing. But,
Since the test method performed using this solvent requires a long time, the restraining time of the test worker becomes long, so an automatic test device has been proposed and put into practical use.

FIG. 4 is a schematic configuration diagram of an essential part of an example of a conventional insoluble matter test device. When an insoluble matter test is carried out by the same device, several kinds of solvents are used for sampling, weighing, The steps of solvent injection, mixing, centrifugation, solvent disposal, drying and weighing are repeated, and the steps from solvent injection to solvent disposal are repeated.

Of these, the solvent injection step has conventionally been performed as follows. That is, the test tube 1 from which the sample is taken is mounted on the work lift 10 by the table (not shown).
When it is transferred and positioned on the upper surface of the work lift 10
Is raised by the cylinder 11. This allows
The test tube 1 also rises and contacts the stopper 20.

Next, the liquid injection tank 30 is lowered by the cylinder 31, the liquid injection nozzle 32 is inserted from the mouth of the test tube 1, and then the solvent is injected from the liquid injection nozzle 32 into the test tube. Here, the liquid injection nozzle 32 has an opening at the nozzle tip, and is configured to inject the solvent directly below toward the bottom of the test tube 1.

[0007]

However, the above-mentioned conventional insoluble matter test has the following problems to be solved. That is, firstly, the measurement results tend to vary,
In order to obtain highly accurate and reliable results, repeated tests must be performed, and the problem is that the work time for test workers is long and work efficiency is poor. The second is that the solvent splashed from the mouth of the test tube 1 when the solvent is poured is the stopper 20.
The problem is that it leaks to the outside through the opening and between the stopper 20 and the test tube 1.

The present invention has been made in order to solve the above-mentioned problems, and makes it possible to obtain highly accurate and highly reliable test results in a short time by reducing the dispersion of measurement results to a very small extent, and It is an object of the present invention to provide an insoluble matter test device which prevents leakage of water to the outside.

[0009]

The cause of the variation in the measurement results has been unknown for many years, but as a result of earnest studies by the present inventors, it was surprisingly found that the separated substances attached to the inner wall of the test tube and It was found that the coagulant was not sufficiently removed. The present invention is based on this finding, the injection nozzle for injecting the solvent from the injection tank into the test tube is provided with a plurality of holes, preferably, the plurality of holes at the tip of the injection nozzle. Provided toward the inner wall of the test tube,
The solvent is ejected from this hole.

According to the insoluble matter testing apparatus having such a structure, when the solvent is injected into the test tube, the solvent ejected from the nozzle hits the inner wall of the test tube and separates from the inner wall of the test tube. Rinse thoroughly with flocculant.

Further, according to the present invention, when injecting a liquid into the test tube, a packing is attached to the lower peripheral edge of the opening of the stopper for positioning in the height direction of the test tube, and / or from the liquid injection tank into the test tube. To the injection nozzle that injects the solvent into
The cap has the same shape as the opening of the stopper for positioning the test tube in the height direction. According to the insoluble matter testing device having such a configuration, when the solvent is injected into the test tube or is discarded, even if the solvent splashes from the mouth of the test tube, the solvent is removed by the stopper and / or the cap. Is prevented from leaking to the outside.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is a schematic configuration diagram of a main part of an embodiment of the insoluble matter testing device of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1. Like the conventional device, the test tube 1
After the sample is taken at a bottle replacement position (not shown), it is transferred to the work lift 10. The work lift 10 can be moved up and down by a cylinder 11, but a holding member 13 of a test tube housing portion 12 for housing the test tube 1 is provided so as to be vertically movable via a spring 14. Fifteen
Is a sensor, and 15a is a mirror, and detects whether or not the test tube 1 is normally accommodated in the test tube accommodating portion 12 by detecting the presence or absence of the holding member 13 when the work lift 10 rises.

The stopper 20 is disposed directly below the liquid injection tank 30 and positions the test tube 1 in the height direction when the work lift 10 is lifted to lift the test tube 1. A packing 22 is provided on the lower peripheral edge of the opening 21 of the stopper 20. As the packing 22, a material having elasticity to some extent and strong solvent resistance,
For example, fluororubber or polyfluorinated ethylene fiber can be preferably used.

The liquid injection tank 30 is mounted by a cylinder 31 via a support rod 31a so as to be able to move up and down, and a liquid injection nozzle 32 is located directly above the opening 21 of the stopper 20. Further, on the peripheral surface of the tip of the liquid injection nozzle 32, at a sufficient pressure for cleaning, and 6 to 10 pieces at equal intervals in order to spray the solvent uniformly in all directions of 360 degrees,
There are preferably eight holes 33 with a diameter of 1-2 mm, preferably 1.5 mm. Here, if the number of the holes 33 is less than 6, the solvent cannot be uniformly ejected in all directions of 360 degrees, and if it is more than 10, the solvent cannot be ejected at a pressure required for cleaning. In addition, the diameter of the hole 33 is 1
If it is less than mm, the time required for the measurement is long due to the long ejection time of the solvent, and if it is more than 2 mm, the measurement time can be shortened, but the ejection pressure of the solvent is low and the cleaning cannot be performed sufficiently.

The number of the holes 33 is not particularly limited as long as the number and the diameter are within the above range. For example, some holes 33 are arranged so as to be shifted in the axial direction of the liquid injection nozzle 32. Good. However, in order to prevent the solvent from accumulating inside the tip of the liquid injection nozzle 32, some holes 33 are always formed at the same height as the inner surface of the tip cover 34, as shown in FIG. There is a need. Further, the hole 33 may be horizontal toward the outer circumference as shown in FIG. 2 or may be inclined downward toward the outside. A drain pipe 35 is provided on the center axis of the liquid injection nozzle 32.

A cap 40 having the same shape as the shape of the opening 21 of the stopper 20 is fitted around the middle position of the liquid injection nozzle 32. The opening 21 of the stopper 20 and the cap 40 facilitate engagement between the two and
In order to improve the airtightness at the time of engagement, the lower part has a small diameter and the upper part has a large diameter. Also for this cap, a material having a certain degree of elasticity and strong solvent resistance, such as fluororubber or polyfluorinated ethylene-based fiber, can be preferably used.

In FIG. 3, reference numeral 50 is a stirring means, and a stirring rod 53 made of polytetrafluoroethylene or the like and having flexibility and wear resistance is attached to the tip of a rotary shaft 52 protruding from the rotary motor 51. The stirring bar 53 spreads outward due to centrifugal force when the rotating shaft 52 rotates,
Rotate while contacting the inner wall of the test tube 1. This allows
The solvent inside the test tube 1 is agitated, and the separated substances and coagulant remaining on the inner wall of the test tube 1 are scraped off.
The rotary motor 51 is supported by a support plate 54, and the support plate 54 can be moved up and down by a drive motor 55 and a ball screw 56. Therefore, when the support plate 54 moves up and down, the stirring rod 53 also moves up and down to move in and out of the test tube 1. The stirring process is performed by the stirring means 50.

The stopper 20, the liquid injection tank 30, and the
Although not shown, the configuration other than the cap 40 and the stirring means 50 is the same as that of the conventionally used insoluble matter testing device.

The solvent injecting step performed by the insoluble matter testing apparatus having the above structure is as follows. When the test tube 1 from which a sample has been collected (for example, 10 cc) is transferred to the lower side of the liquid injection tank 30, the work lift 10 is lifted by the cylinder 11. Work lift 1
The test tube 1 also rises with the rise of 0, and its mouth contacts the stopper 20. At this time, the peripheral edge of the test tube 1 is pressed against the packing 22 of the stopper 20 with an appropriate force by the holding member 13 elastically biased upward by the spring 14.

When the test tube 1, that is, the holding member 13 is lifted and positioned, and if the test tube 1 is damaged, the holding member 13 is lifted to a high position by the spring 14 and the sensor 15 is installed. Between the mirror 15a and the mirror 15a. Then, the sensor 15 detects this and outputs a signal to a control unit (not shown) of the insoluble matter testing device to stop the subsequent work.

When the test tube 1 is not damaged and is positioned normally, then the liquid injection tank 30 is lowered by the cylinder 31, and the liquid injection nozzle 32 passes through the opening 21 of the stopper 20. Then, it is inserted into the test tube 1. At this time, the tip of the liquid injection nozzle 32 is 5 to 1 from the liquid level when the liquid in the test tube reaches 100 cc.
It is set so that the position is 0 cc higher. Further, when the liquid injection nozzle 32 is set as described above, the cap 40 is engaged with the opening portion 21 of the stopper 20 so as to be pressed against the opening portion 21 with an appropriate force.

The test tube 1 is positioned and the liquid injection nozzle 32
Is set to a predetermined position, a solvent pump (not shown) is activated to cause the liquid injection tank 30 to have the hole 33 of the liquid injection nozzle 32.
Eject solvent from. At this time, since the hole 33 is formed on the peripheral surface of the liquid injection nozzle 32 toward the inner wall of the test tube 1, the ejected solvent hits the inner wall of the test tube 1 and adheres to the inner wall. Wash away any segregants or flocculants that are present.

When the solvent is ejected from the hole 33 of the liquid injection nozzle 32, the solvent may splash and leak from the mouth of the test tube 1. However, in this case, the packing 22 provided between the mouth of the test tube 1 and the stopper 20 and the cap 40 engaged with the opening of the stopper 20 prevent the solvent from leaking to the outside. To do. In this way, the solvent injection step is completed.

Even in the solvent disposal process, the solvent in the test tube may spill out.
The test tube 1 is pressed against the packing 22 on the lower surface of the stopper 20 with an appropriate force, and the cap 40 is also engaged with the opening 21 of the stopper 20 so as to be pressed with an appropriate force. Does not leak out.

The present invention is not limited to the above embodiment, but includes various modifications within the scope of the gist.

[0026]

EFFECTS OF THE INVENTION According to the insoluble matter testing device of the present invention having the above-described structure, when the solvent is injected into the test tube,
The solvent ejected from the nozzle hits the inner wall of the test tube,
Since the separated substances and the coagulant adhering to the inner wall are sufficiently washed away, the dispersion of the measurement results becomes extremely small, and highly accurate and reliable test results can be obtained in a short time.

Further, even if the solvent leaks to the outside when the solvent is injected into the test tube or is discarded, the leak is surely prevented by the stopper and / or the cap.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part of an embodiment of an insoluble matter testing device of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is an explanatory diagram of a stirring unit.

FIG. 4 is a schematic configuration diagram of essential parts showing an example of a conventional insoluble matter testing device.

[Explanation of symbols]

 1 Test Tube 10 Work Lift 11 Cylinder 12 Test Tube Housing 13 Holding Member 14 Spring 15 Sensor 15a Mirror 20 Stopper 21 Opening 22 Packing 30 Injection Tank 31 Cylinder 32 Injection Nozzle 33 Hole 34 Tip Cover 40 Cap

Claims (4)

[Claims] 1. An insoluble matter testing device, wherein a plurality of holes are provided in a liquid injection nozzle for injecting a solvent from a liquid injection tank into a test tube. 2. The insoluble matter testing device according to claim 1, wherein the plurality of holes are provided at the tip of the liquid injection nozzle and toward the inner wall of the test tube. 3. The insoluble matter testing device according to claim 1, wherein a stopper for positioning the test tube in the height direction is arranged, and a packing is provided between the stopper and the test tube. . 4. The insoluble matter testing device according to claim 1, wherein a cap having the same shape as the opening of the stopper of the test tube is attached to the liquid injection nozzle.