JPH0524202Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cell for an optical deterioration detection device for lubricating oil.

(Prior art) A way to routinely check the degree of deterioration of lubricating oil used in factories, ships, passenger cars, trucks, buses, etc. is to pull up the oil gauge inserted into the lubricating part of the engine and check the oil gauge. The oil droplets that collect at the tip are placed on a white cloth and visually judged.

(Problem to be solved by the invention) This conventional method has a large correlation error range due to human visual inspection, and lacks accuracy because it is not quantified. I can't find any alternative.

As a result of various studies, we found that, although the industrial field is completely different, it is used to test the properties and components of liquids, for example, by mixing reagents with test liquids and examining the degree of discoloration and alteration characteristics. We came up with the idea of using a cell, transferring the sample lubricating oil to this absorption cell, and measuring the absorbance using spectrophotometry to quantify the degree of deterioration.

However, in order to investigate the degree of deterioration of vehicle lubricating oil at testing laboratories, sales offices, gas stations, etc., a large number of the above-mentioned quartz or glass absorption cells must be prepared in order to be able to handle the actual work. Moreover, the absorption cell itself is very expensive, and furthermore, the arrangements for handling it, cleaning the oil after use, drying storage, etc. are complicated, so it is difficult to apply it in testing laboratories, sales offices, gas stations, etc. There's a problem.

Therefore, the present invention has been developed based on the conventional absorption cell as described above, by adding various improvements to the cell that can be easily filled with lubricating oil and that can be successfully used as a cell for an optical deterioration detection device for lubricating oil. The purpose is to provide

(Means for Solving the Problems) In order to achieve the above object, the cells for an optical deterioration detection device for lubricating oil of the present invention are arranged such that cells face each other with a minute interval of 0.1 to 3.0 mm, and A pair of transparent plates in which the upper end of one is extended upwardly by an appropriate dimension and the extended portion is formed at the edge; and a side plate that connects both transparent plates at both their left and right ends; A side wall plate whose upper ends of the left and right side plates extend upward to form side walls on both the left and right sides of the edge, and a bottom plate that closes the lower ends of both transparent plates and both side plates are integrally molded from a synthetic resin material. A cell is formed with a flat hole at the bottom, and one or more micro holes of 0.1 to 1.0 mmφ are bored at arbitrary positions in the transparent plate near the bottom of the flat hole, and a certain amount of lubricating oil is allowed to fall by gravity or/and It is formed to be accommodated in this flat hole by capillary pressure.

Furthermore, the configuration of the present invention will be explained.

In this invention, the interval between the transparent plates of the lubricating oil storage section is
The reason for the minute spacing of 0.1 to 3.0 mm is that when the lubricating oil used as engine oil deteriorates over time, the color of the oil changes and carbon particles are mixed in, gradually becoming dark black. Therefore, if the distance between the transparent plates of the cell is large, the light transmittance will be low, which is not preferable for measuring absorbance. Also,
The 0.1 to 1.0 mm diameter micropores near the bottom were set in a range where the sample lubricating oil would not seep out.

The edge formed by extending the upper end of one of the pair of transparent plates to an appropriate dimension above that of the other may be formed by making the vertical dimension of one of the transparent plates longer than that of the other. Alternatively, it may be formed by appropriate means such as making a notch at an arbitrary position on the upper end of one of the transparent plates to form a notch.

The dimensions of the cell are preferably in the range of 10 to 15 mm in width and 35 to 40 mm in length, but these dimensions are appropriately selected within the range of the purpose of the present invention.

Further, the synthetic resin that is the material of the transparent plate may be either a thermoplastic synthetic resin or a thermosetting synthetic resin that can transmit visible light, infrared rays, etc., and is appropriately selected as necessary.

(effect) Next, the operation of the present invention will be explained.

When the sample lubricating oil attached to the oil gauge is attached and dripped onto the edge formed by the extension of the one transparent plate of the cell, the sample lubricating oil falls into the lubricating oil storage part due to gravity fall and/or capillary action. As the sample lubricating oil enters the lubricating oil container, the air inside the lubricating oil container is pushed out into the atmosphere through the 0.1 to 3.0 mm micropores near the bottom. The entire area is well filled with oil. The edge and the side wall plates on the left and right sides of the edge protrude upward from the upper end of the other transparent plate, so that the lubricating oil deposited and dropped on the edge is smoothly guided to the lubricating oil storage section. This effectively prevents the liquid from overflowing onto the surface of the transparent plate.

After filling the oil, connect it to the light source section, wavelength selection section,
The absorbance or transmittance of the sample lubricating oil is measured by inserting it into the sample insertion section of a photoelectric spectrophotometer or photoelectric photometer, which consists of a sample section and a photometry section.

After the measurement is completed, this cell is discarded.

(Example) Embodiments of the present invention will be described based on the drawings.

The cell for the optical deterioration detection device for lubricating oil of the present invention has the height dimensions of the front and back sides facing each other with an interval of 1.5 mm 3 and with the lower ends placed at the same height level. Transparent plates 1 and 2 with different sizes (in this example, thickness 0.5 mm, length 2.5 mm x width 12 mm x height 25 mm)
transparent plate and thickness 0.5mm, length 2.5mm x width 12mm x height
35 mm back transparent plate), side plates 5 and 5' that connect these fully transparent plates 1 and 2 at both their left and right ends and extend integrally to the upper end of the back transparent plate 2, and the transparent plate 1, 2 and the left and right side plates 5, 5', and a bottom plate 4 that closes the lower end of the flat hole formed by the left and right side plates 5, 5' is integrally formed by injection extrusion molding using transparent hard vinyl chloride resin, and has a rectangular shape. A portion of the back transparent plate 2 that extends upwardly from the upper end of the front transparent plate 1 is formed at the edge 6, and the inside of the bottomed cylinder 7 is lubricated. A hole with a diameter of 0.5 mm is formed in the oil storage portion 12 and in the transparent plates 1 and 2 near the bottom plate 4 as a microhole 8.

Then, when the sample lubricating oil attached to the oil gauge is attached and dripped onto the edge 6 of the cell 9 and the cell 9 is tilted with the edge 6 facing upward, the sample lubricating oil falls due to gravity and/or capillary action. Therefore, the lubricant oil enters into the lubricant storage part 12, but at this time, the air inside this lubricant oil storage part 12 is pushed out into the atmosphere through the micro holes 8 drilled near the bottom plate 4, and the sample lubricant is The oil can be easily and smoothly filled into the accommodating portion 12.

In addition, the edge 6 and the side wall plates 5, 5 provided on the left and right sides thereof play a role of effectively guiding the sample lubricating oil deposited and dropped on the edge to the lubricating oil storage section 12, so that Compared to a cell in which the upper ends of the transparent plates 1 and 2 are at the same height level, filling the cell with oil is much easier and more reliable.

When the oil filling is completed, the filled cell 9 is inserted into the sample insertion part of the photoelectric spectrophotometer or photoelectric photometer, which consists of a light source part, wavelength selection part, sample part, and photometry part, and the absorbance or transmission of the sample lubricating oil is measured. Measure the rate. After the measurement is completed, the cell 9 is discarded.

As another example, transparent plate 1 made of cured vinyl chloride [width 10 mm, thickness 0.3 mm, length 25 mm] and transparent plate 2
Between [width 10 mm, thickness 0.3 mm, length 35 mm] side wall spacer plates 13, 14 of the same or different material [width 2.5 mm,
Thickness 0.3mm, length 32.5mm] on both ends, and bottom spacer plate 15, [width 2.5mm, thickness 0.3mm, length 10
mm] as shown in FIG.
A microhole 8 of 0.3 mmφ is bored in the cell 9 to form a cell 9.
Similarly to the above, the sample lubricating oil 11 is placed in the lubricating oil storage section 12.
Fill with oil and measure the absorbance or transmittance of the sample oil.

As another example, although not shown in the figure, the interval 3 between the transparent plates 1 and 2 is 1.5 mm, and the bottom plate 4 and the side wall 5,
Rectangular cylinder consisting of 5′ [transparent plate thickness 0.5 mm, length 2.5
mm×width 12 mm×height 35 mm] using transparent hard vinyl chloride resin by injection extrusion molding, and a slit was made in the transparent plate 1 at a position 10 mm below from the upper end opening of the rectangular cylinder to form a side wall. Transparent plate 1 leaving 5 and 5'
Cut out to expose the edge of the transparent plate 2, and make a microhole 8 of 0.5 mmφ in the transparent plates 1 and 2 near the bottom plate 4 to form a cell 9 (the shape is similar to that shown in Fig. 2). .

Next, a sample lubricating oil 1 is placed on the edge of the rectangular cylinder 7 in the shape of a rectangular cylindrical body 7 in which the microhole 8 is not bored near the bottom plate 4.
Even if an attempt is made to fill the lubricating oil storage portion 12 with the lubricating oil by dropping the lubricating oil 1, the distance 3 between the transparent plates 1 and 2 is 1,
It is as small as 0 mm, and is obstructed by the air present in the lubricating oil storage portion 12, making it extremely difficult to fill the lubricating oil.

(Effects of the invention) As described above, the cell for the optical deterioration detection device for lubricating oil of the present invention is integrally formed from synthetic resin, so it has better performance than the absorption cell used in conventional analysis methods. It can be produced at a much lower cost and can be used once and then thrown away. Therefore, unlike the conventional absorption cells mentioned above, it is not bound by troublesome arrangements such as cleaning treatment after use and dry storage, and it can be used in testing facilities, sales offices, etc., which were previously considered difficult to adopt. This makes it possible to easily and easily inspect the degree of deterioration of lubricating oil with high accuracy at gas stations, etc.

In addition, since it is a cylinder with a bottom, the sample lubricating oil filled in the lubricating oil storage area does not easily spill out of the cell, unlike the conventional lubricating oil storage area that is configured as a simple flat hole with an open top and bottom. It is much easier to handle than absorption cells.

Moreover, although the present invention has a bottom, by forming micropores of 0.1 to 1.0 mm in diameter in the transparent plate near the bottom plate, it is possible to prevent the sample lubricating oil from falling due to gravity and/or by capillary action. The air in the housing can be quickly pushed out to the atmosphere through the micropores, and the housing can be easily and smoothly filled with sample lubricating oil, which can greatly contribute to improving work efficiency.

In addition, the present invention includes side wall plates on the left and right sides above the lubricating oil storage part, and has edges that guide the sample lubricating oil that has been deposited and dropped into the lubricating oil storage part.
To cleanly, reliably, smoothly, and efficiently fill a lubricating oil storage part with less risk of sample lubricating oil adhering to the surface of a transparent plate of a cell and contaminating it.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of a cell for detecting optical deterioration of lubricating oil according to the present invention, Fig. 2 is an explanatory diagram of another embodiment of the present invention constituted by members, A and B are side views; C is a plan view. The numbers in the drawings are as follows. 1, 2...transparent plate, 3...interval, 4...bottom plate,
5, 5'... Side wall plate, 6... Edge, 7... Rectangular cylindrical body in the shape of a rectangle, 8... Microhole, 9... Cell,
10...Oil gauge, 11...Sample lubricating oil, 1
2... Lubricating oil storage section, 13, 14... Side wall spacer plate, 15... Bottom spacer plate.

Claims (1)

[Scope of utility model registration request] A pair of transparent plates that face each other with a minute interval of 0.1 to 3.0 mm and have an edge formed by extending the upper end of one of them to an appropriate dimension above the other; A side plate that connects the plates at both their left and right ends, a side wall plate whose upper ends extend upward to form side walls on both the left and right sides of the edge, and which closes off both transparent plates and the lower ends of both side plates. A bottom plate is integrally molded with a synthetic resin material to form a cell with a bottomed flat hole, and one or more micro holes with a diameter of 0.1 to 1.0 mm are bored at any position on the transparent plate near the bottom of the flat hole. A cell for an optical deterioration detection device for lubricating oil, which is formed so that a certain amount of lubricating oil is accommodated in the flat hole by gravity drop and/or capillary pressure.