JP2560188Y2 - Hydraulic oil contamination inspection container - Google Patents

Description

[Detailed description of the invention]

[0001]

Industrial Applicability The present invention is intended to reduce the water content of water-soluble hydraulic oil (water-glycol hydraulic oil, etc.) used in hydraulic equipment.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting the degree of contamination of hydraulic oil, which can easily inspect the property change and the degree of contamination due to oxidative deterioration, reduction of additives, contamination of foreign substances, and the like, and particularly to an inspection container thereof.

[0002]

2. Description of the Related Art In recent years, in order to prevent a fire accident, a large amount of flame-retardant water-soluble hydraulic oil is used in place of mineral oil for hydraulic equipment used in high-temperature environments such as steelmaking and steelmaking plants. I was able to. For example, a water-glycol hydraulic oil mainly composed of ethylene glycol is glycol 4
It is prepared with 0%, water 40%, and additive 20%. In order to operate hydraulic equipment smoothly, it is necessary to always grasp its properties and to manage hydraulic oil accurately. That is,
The water-soluble hydraulic oil causes a decrease in water content due to evaporation of water, a chemical change (eg, oxidative deterioration), and the entry of foreign matter such as dust during the years of use, and causes troubles such as clogging and seizure of the hydraulic cylinder. Therefore, oil management of the water-soluble hydraulic oil is extremely important.

[0003] Conventionally, this type of oil agent management involves periodically sampling oil from an oil tank and judging the degree of contamination by visual inspection or touch, or measuring the degree of contamination (NAS class inspection) and chemical analysis by an oil agent manufacturer. (Moisture, alkali number, P
H etc.) had been performed. However, in the former, quantitative determination is difficult, and accurate property determination cannot be performed. In the latter case, there is a problem that a large amount of time and cost is required for the analysis test, and it is not possible to make a direct determination on site. Also, JP-A-63-
No. 96546 discloses a water-soluble hydraulic oil which applies a high-frequency voltage to a water-soluble hydraulic oil interposed between electrodes, measures its electrical impedance, and detects a property change of the water-soluble hydraulic oil from a change in impedance. A property inspection device has been proposed.

In this type of conventional apparatus, when inspecting oil, only a required amount of oil to be inspected is sampled from an oil tank of a hydraulic device or the like, and the sampled oil is injected into a transparent measuring cell such as a glass cell to measure an electrical impedance. The electrode was inserted in the measuring container. Therefore, this method has a problem that unless the electrode and the measuring container are washed for each measurement, a measurement error occurs due to mixing of the previously measured residual oil. In addition, there has been a problem that the electrode for measurement is oxidized or scratched due to long-term use, the measurement sensitivity is changed, and the reproducibility is poor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to transmit the degree of contamination caused by contamination of the water-soluble hydraulic oil to be measured with dust. Rate as well as the change in electrical impedance of the water-soluble hydraulic fluid to be measured, as well as the change in water content, oxidation, decrease in additives, and contamination of foreign substances. An object of the present invention is to provide a disposable test container that can be easily and simply tested.

[0006]

In order to achieve the above object, according to the present invention, a container into which an oil to be inspected can be filled,
Two wall surfaces made of a parallel and opposed transparent material that are provided in a part of the container and constitute a light passage portion, and are opposed to each other at a fixed interval that constitutes an electrode portion provided in another part of the container. The present invention provides a container for inspecting the degree of contamination of hydraulic oil, comprising: Further, as the inspection device, an inspection device to which the above-mentioned pollution degree inspection container into which the oil to be inspected has been injected can be attached, sandwiching the two wall surfaces made of the transparent material of the attached contamination degree inspection container. And a light receiver arranged as described above, a conductive contact disposed so as to be slidable on each of two wall surfaces of the metal plate of the mounted contamination test container, and the conductive contact And a temperature sensor disposed in contact with any one of the above.

[0007]

In the contamination inspection container constructed as described above, the light transmittance of the oil is measured through the two walls made of a transparent material, and the electrical impedance of the oil is measured by the metal plate constituting the electrode. . Since the inspection container is replaced with an unused container every time measurement is performed, stable and accurate oil performance inspection can be performed without being affected by sensitivity change due to contamination of the container or oxidation of the electrode surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a container 1 for inspecting the degree of contamination of hydraulic oil (hereinafter referred to as an inspection container 1), and FIG. 2 is a sectional view. The inspection container is formed of a transparent acrylic resin or the like, and has a substantially square shape opened upward. Above the inspection container, two walls 2 and 3 made of transparent acrylic resin or the like facing in parallel are formed, and constitute a light passage portion. The lower part of the inspection container is formed to be narrow, and metal plates 4 and 5 are fixed to the window of the inspection container and are sealed. The left and right metal plates 4 and 5 are opposed to each other at a fixed interval to form an electrode portion. When oil 6 is injected into the inspection container 1,
As shown in FIG. 2, the oil 6 is filled up to the light passage.

FIG. 3 is a block diagram of the contamination inspection apparatus showing the measuring jig 10 in a cross section. The measuring jig 10 is provided with conductive contacts 11 and 12 having a leaf spring structure.
Slidably in contact with the left and right metal plates 4 and 5 so as to make electrical conduction contact. A temperature measuring thermistor 13 is arranged on the back surface of one conductive contact 12 so that the temperature of the oil 6 in the inspection container 1 can be measured by utilizing the heat conduction between the metal plate 5 and the conductive contact 12. Have been. A light emitting device 15 and a light receiving device 16 are disposed on the upper surface of the measuring jig 10 so as to face both sides of the light passage portion of the inspection container 1, and a lens 17 for converging light is provided in front of the light emitting device 15. Is provided.
The lens 17 may be provided before the light receiver 15.

A light emitting device 15 composed of a light emitting diode is connected to a DC power supply 21 and emits light at a predetermined illuminance. Receiver 1
Reference numeral 6 denotes a phototransistor, which is connected to the light detection circuit 22 and outputs a signal corresponding to the amount of received light. Thermistor 1
3 is connected to the temperature detection circuit 23 and outputs a signal corresponding to the detected temperature. Conductive contacts 11 and 12 having leaf spring structure
The one conductive contact 11 is connected to a high frequency power supply 24, and the other conductive contact 12 is connected to a load capacitor 25.
And to the voltage detection circuit 26. As the high-frequency power supply 24, for example, a power supply of 20 KHz and 5 V is used, and as the load capacitor 25, a capacitor having the same impedance as that of the new oil is desirable. The outputs of the light detection circuit 22, the temperature detection circuit 23, and the voltage detection circuit 26 are input to an A / D converter 31 and converted into digital values,
Is input to The microprocessor 32 determines the degree of contamination of the hydraulic oil 6 based on an algorithm and determination criteria stored in advance, and displays it on the display 33 and the OK lamp 34. Further, a key switch 35 for inputting necessary data is connected to the microprocessor 32.

The operation based on the above configuration will be described. According to such a configuration, when the water-soluble hydraulic oil to be inspected is at the optimum measurement temperature, a high-frequency voltage is applied to the electrodes 4 and 5 to change the electric power of the oil due to oxidative deterioration of the oil, decrease in additives, decrease in moisture, and the like. The change in the impedance is detected as a change in the amplitude of the high-frequency voltage appearing at both ends of the load capacitor 25, and the voltage value is compared with the measured value of the new oil as a reference value to determine the degree of change in the properties of the oil. At the same time, the light transmittance of the water-soluble hydraulic oil to be inspected is measured by the light emitting device 15 and the light receiving device 16 arranged opposite to each other, and the light transmittance is compared with a reference value to determine the degree of contamination. Next, by making a composite determination of the degree of the property change of the oil and the degree of contamination, a complicated degree of contamination in which a plurality of items of oil are mixed is accurately and quickly determined.

According to the above configuration, the inspection container 1 can be very easily attached to and detached from the inspection device simply by inserting it into the jig 10, and the time and effort for oil performance inspection can be greatly improved. Further, the inspection container 1 of the present invention has a very simple structure and can be manufactured at low cost, so that it can be disposable.
As a result, an unused container can be used for each measurement, and the effect of sensitivity change caused by oxidation of the electrode or the like can be avoided, and stable and accurate oil performance inspection can be performed.

[0013]

[Effects of the Invention] In the present invention, since the hydraulic oil inspection container having the above structure is disposable, it can be easily attached to and detached from the inspection device, and the time required for oil performance inspection is greatly reduced. In addition to being able to improve, there is an excellent effect that it is possible to avoid the influence of the change in sensitivity caused by the oxidation of the electrode and to perform a stable and accurate oil performance test.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a container for inspecting the degree of contamination of hydraulic oil.

FIG. 2 is a sectional view of an inspection container.

FIG. 3 is a block diagram of a contamination inspection apparatus showing a measuring jig in cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inspection container 2, 3 Two wall surfaces made of transparent material 4, 5 Metal plate which constitutes electrode part 11, 12 Conductive contact 13 Thermistor 15 Light emitting device 16 Light receiving device 32 Microprocessor

 ──────────────────────────────────────────────────続 き Continuation of the front page Examiner Toshimitsu Suzuki (56) References JP-A-1-295136 (JP, A) JP-A-63-96546 (JP, A) JP-A-51-85795 (JP, A)

Claims (2)

(57) [Scope of request for utility model registration] 1. A container into which an oil to be inspected can be poured, wherein two walls made of a parallel and opposed transparent material which are provided in a part of the container and constitute a light passage portion, and another one of the container. 1. A container for inspecting the degree of contamination of hydraulic oil, comprising: two wall surfaces formed of metal plates that are opposed to each other at a constant interval and that are provided in the unit and that constitute an electrode unit. 2. The inspection device to which the pollution degree inspection container according to claim 1, wherein oil to be inspected is injected, wherein the two walls made of the transparent material of the installed contamination degree inspection container are attached. A light emitting device and a light receiving device disposed so as to sandwich the conductive contact; and a conductive contact disposed so as to be slidable on each of the two wall surfaces formed of the metal plate of the mounted contamination test container; and the conductive contact. And a temperature sensor disposed in contact with one of the slaves.