JPH0138647Y2 - - Google Patents

Description

[Detailed description of the invention] This invention adds a suction force by an electromagnet to the internal float that drives the on-off valve installed in the fluid passage into the measurement container, and forcibly prevents the decrease of fluid from the on-off valve. This relates to a constant liquid level device.

FIG. 1 shows a conventional liquid level device, which is constructed as follows. That is, measurement container 1
When the fluid 2 flows into the container from the passage 3, the internal float 4 floats and rotates around its support point 5, and when the inside of the container 1 reaches a predetermined normal liquid level, the float 4
The passage opening/closing valve 6 driven by is closed, and the flow of the fluid 2 into the container 1 is stopped.

Thereafter, unless the fluid in the container decreases, the float 4 does not go down and the liquid level in the container is maintained constant. However, for example, if the on-off valve 6 deteriorates and its elasticity etc. decreases, the closing pressure caused only by the buoyancy of the float 4 will not be able to prevent the fluid from flowing into the container, and the fluid will flow in, albeit little by little. When a slow leak phenomenon occurs and the internal float 4 gradually floats and reaches a predetermined abnormal liquid level higher than the normal liquid level, it finally comes within the magnetic force range of the forced closing permanent magnet 7 installed opposite to this float, and the float It is configured to attract the magnetic body 8 provided on the upper surface of the valve 4 to strengthen the closing force of the on-off valve 6.

However, in the conventional type that uses permanent magnets to strengthen the on-off valve, once the float is attracted, it does not descend by itself, and the on-off valve 6 remains closed. In this case, the reset button 9 for the permanent magnet 7
The float 4 in the adsorbed state must be forcibly dropped by hitting the float 4, which causes inconvenience in terms of management as the liquid level device must be constantly monitored by the user.

This invention is intended to eliminate such conventional drawbacks, and one embodiment of the liquid level device of this invention will be described below. That is, in FIG. 2, the same parts as those in FIG. The electromagnet 10 is characterized in that the electromagnet 10 is energized and deenergized by opening and closing a float switch 12 provided in a float chamber 11 communicating with the container 1.

Specifically, when, for example, a combustion control device incorporating the liquid level gauge according to the invention with the above configuration is connected to the power source 13 as shown in FIG. 3, the relay 1 provided in the control circuit 14
5. A voltage is applied to the relay contact 16 for energizing/deenergizing the electromagnet 10 and the electromagnet 10 driven by the relay 15. At this time, if the liquid level in the container 1 exceeds a predetermined abnormal liquid level that is higher than a preset normal liquid level, the float switch 1 is activated.
2 turns ON, which activates the relay 15 and turns its contact 16 ON, energizing the electromagnet 10 and strongly blocking the slow leak from the on-off valve 6 by the magnetic force of the float's attraction to the magnetic body 8. do.

In this state, if consumption of the liquid (for example, fuel oil) starts and the liquid level in the container 1 drops below the abnormal liquid level, the float switch 12 will be turned OFF.
The energization of the electromagnet 10 is stopped and the float 4 falls. Due to this fall, the on-off valve 6 opens and the supply fluid flows in from the passage 3, thereby operating normally as a constant liquid level device. Others 17 in the diagram is electromagnet 1
0 rectifier, 18 indicates the energizing coil of the electromagnet.

Since the liquid level device of this invention is constructed as described above, the occurrence of accidents due to failure of the on-off valve to close is greatly reduced, and unlike conventional cases, it is not necessary to go out of your way to reset the liquid level device outdoors. This also completely eliminates the inconvenience of having to go out to the installation location.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional liquid level device, Fig. 2 is a similar sectional view showing a liquid level device of this invention, and Fig. 3 is a sectional view showing a conventional liquid level device.
The figure shows, for example, a control circuit diagram of a combustion control device showing the usage state of the liquid level regulator of the present invention. In the figure, 1 is a measurement container, 3 is a fluid passage to this container, 4 is an internal float, 6 is an on-off valve for the fluid passage driven by this float, 10 is an electromagnet for forced attraction of the float 4,
Reference numeral 12 indicates a float switch for energizing and deenergizing this electromagnet. In other figures, the same reference numerals indicate the same parts.

Claims (1)

[Scope of utility model registration request] A container 1 which stores a fluid 2 therein and has an inlet through which the fluid 2 is supplied from the outside; an on-off valve 6 provided at the inlet; A float 4 that closes when the liquid level of the fluid 2 rises above a predetermined liquid level and opens when it falls below a predetermined liquid level, an electromagnet 10 provided in the container 1, and the float that can be magnetically coupled to the electromagnet 10. 4 and the electromagnet 10 installed in the container 1 when the liquid level of the fluid 2 is abnormally higher than the predetermined liquid level by a certain value.
The electromagnet 10 attracts the magnetic body 8 and strengthens the closing of the on-off valve 6 by the float 4 when energized. Characteristic constant liquid level device.