JP2002039842A - Float type level gage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that there is no sealed type simple level gage equipment for monitoring and controlling a liquid level of a high temperature oil tank and the like in the prior art. SOLUTION: A simple, convenient, highly precise and highly reliable liquid level sensor resistant against an environment is composed of a float 4 for measuring the liquid level, a pulley part 5 and a counter weight 6 for winding the float up, and a pulley 8 connected to the counter weight 6, by blocking an air flow between the former part and the latter part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level measuring equipment, and more particularly to a float type liquid level measuring equipment using a float and a counterweight used for vertical movement thereof.

[0002]

2. Description of the Related Art Conventionally, in the case of using a float type liquid level gauge facility using such a float, there are many attempts to use a float guide to make the float level following operation smoother. Was. However, the float was often caught by the float guide. Such equipment is often used in places where environmental conditions are particularly poor, for example, in various tanks for engine rooms of ships. However, in such various tanks for the engine room, it is important to secure a guide for the float, especially acceleration, impact, and swaying in each direction during the operation of the ship, and to ensure smooth vertical movement thereof. In particular, in the case of a balance weight type float level gauge equipment utilizing a counterweight for winding the float, an increase in contact resistance between the float guide and the float may adversely affect the measurement accuracy. In addition, various tanks for such an engine room require the installation of many facilities in a narrow place, and the frequency of changing the guide position for the balance weight to ensure smooth operation of the balance weight during the operation is also required. There were many.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and minimizes the components to be installed on the tank side in places where the environmental conditions are poor, for example, in various tanks for an engine room. In addition, it was necessary to optimize the materials used. In addition, it is necessary to reduce the degree of influence on components outside the tank which are particularly susceptible to dirt due to passage of contaminants such as vapor due to air permeability and water permeability with the tank side. In addition, a device for ensuring smooth operation of the float and the balance weight was required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a stainless steel is used only in a place where environmental conditions are inferior, that is, as a float and its float hoisting pulley portion. Structured to increase corrosion resistance. In addition, the durability and reliability of the other components are improved by blocking the air permeability with the structure of the liquid level gauge itself.

Further, according to the present invention, the shape of the float is changed to the line contact portion 2 in contact with the external guide in the use state.
The contact accuracy is reduced because the device is operated at a low temperature, and the measurement accuracy is improved by performing a smooth operation particularly on a liquid having a high viscosity.

[0006]

FIG. 1 is a block diagram showing an embodiment of the present invention.
It will be described based on. FIG. 1 shows an embodiment of the present invention. This figure shows a cross section of the float type liquid level gauge 3 installed on the upper part of the tank 1. It is particularly important to consider various types of tanks for the engine room of a ship in terms of dust resistance and heat resistance. Therefore, it is desired to block air permeability from the external environment.

Next, the configuration of the float type liquid level gauge 3 will be described. The float type liquid level meter 3 includes a float 4 in a tank, which rises and falls according to a change in the liquid level of the tank, a hoisting pulley portion 5 mechanically connected to the float 4, and a hoisting pulley portion 5. Counterweight 6 and hoisting pulley 5 for hoisting according to the fluctuation of float 4
And a pulley 7 connected to the counterweight 6 of the liquid level indicator by transmitting the rotation of the liquid. In FIG. 1, the hoisting pulley portion 5 and the pulley 7 have the same diameter, but there may be a difference in diameter. In this case, the operation of the float 4 and the counterweight 6 can be given a deceleration or speed-up effect. In addition, a float upper limit stopper that can be fixed to an arbitrary position of the mechanical connection component 11 above the float 4,
Float operation can be restricted.

The float 4 is often in oil or water, and is usually made of stainless steel in order to increase the temperature and increase the corrosion resistance in some tanks. Also, an upper limit stopper is attached slightly above the float 4.

The hoisting pulley portion 5 mechanically connected to the float 4 is usually made of stainless steel wire.
In many cases, it is installed directly above the float 4 and is installed inside a sealed aluminum box in order to block air permeability to the external environment. Since this aluminum box is lightweight, the workability of installation in a narrow engine room can be enhanced.

Further, in order to shut off the air flow between the hoisting pulley portion 5 mechanically connected to the float 4 in the tank and other components, the bearing portion 7 is provided with a sealed bearing and further another independent seal. It has a built-in configuration.

Another embodiment of the present invention will be listed. FIG. 2 is a diagram showing another embodiment of the present invention. This configuration further increases the problem of blocking ventilation between the hoisting pulley portion 5 mechanically connected to the float 4 in the tank and other components. That is, by using a magnetic coupling instead of the mechanical seal of the bearing portion 7 in FIG.
The aim is to completely shut off the ventilation.

FIGS. 4 and 5 show an example of a method of connecting a pulley connected to the liquid level indicator to the counterweight 6 also serving as a liquid level indicator. In such a case, since the mechanical connecting part 11 is likely to be disengaged from the pulley connected to the liquid level indicating part, the falling-off preventing device 10 is preferably configured as shown in FIG. In other words, there is a method in which a guide pulley, a bush having a small coefficient of friction, or a sliding member is connected to the liquid level indicating portion at a pitch circle of the mechanical connecting part 11 of the pulley connected to the liquid level indicating portion.

FIG. 6 is a diagram for explaining a configuration in which the float type liquid level gauge of the present invention requires various control and alarm contacts. That is, when the reed switch is used for various control and alarm contacts, it is necessary to operate the reed switch with a magnet incorporated in the counterweight 6 of the normal liquid level indicating unit. A guide rail for guiding the counterweight 6 must use a non-magnetic material such as stainless steel. However, since the use of stainless steel is inferior in economical efficiency, it can be dealt with by providing a notch at the reed switch operating point by using a magnetic iron. It is also possible to use a resin including the indicating scale plate. The counterweight 6 also serves as a scale plate indicating portion, and the contact with the guide can be operated by the line contact portion, similarly to the shape of the float 4.

The float type liquid level meter 3 according to the present invention is not limited to the counterweight type, but may be a normal spring type float type liquid level meter.

[0015]

According to the present invention, it is possible to provide a float type liquid level gauge capable of stably measuring the liquid level of various tanks for an engine room of a ship in a sealed type, which has been difficult in the past. Also, the durability and reliability of the parts used can be improved.

[0016]

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a diagram showing a structure of a float of the present invention.

FIG. 4 is a view showing an embodiment of a pulley angle changing structure.

FIG. 5 is a view showing an embodiment of a pulley angle changing structure.

FIG. 6 is a diagram showing an embodiment of contact mounting for use in the float type liquid level gauge of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 line contact part 3 Float type liquid level meter 4 Float 5 Hoisting pulley part 6 Counter weight 7 Bearing part 8 Float upper limit stopper 9 Magnet coupling 10 Fall prevention tool 11 Mechanical connection parts

Claims (3)

[Claims] 1. A float type liquid level gauge, wherein ventilation between a hoisting pulley portion mechanically connected to a float in a tank and the outside is shut off. 2. A guide pipe for externally guiding a float connected to the hoisting pulley portion is provided with at least one or more vents above the uppermost liquid surface, and the float is provided at least in a portion in contact with the external guide. Float type liquid level meter characterized by having two line contact parts. 3. The float type liquid level gauge according to claim 1, wherein the winding direction of the pulley connected to the liquid level indicator can be freely set.