JPS60648Y2 - water level control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water level control device for controlling the water level by detecting the water level and transmitting signals for starting and stopping a pump.

When supplying water to a boiler or tank, etc., when using a water level regulator to start and stop the pump to adjust the water level, in the conventional type, as shown in Fig. 1, the water level is connected to the tank 7. In the float case 6 set up,
A guide cylinder 13 that houses a float 1 with a magnet 2 fixed by a connecting rod 12 and that forms a passage for the magnet 2 and adjusts the vertical position of the magnet 2 according to the rise and fall of the water level.
When the water level rises and the magnet switch 4 issues a signal, the pump is stopped, and when the water level falls and the magnet switch 3 issues a signal, the pump is restarted. The water level is controlled so that it falls within the range between the highest and lowest water levels.

The absolute value of the water level and the water level width are determined by the magnetic switches 3 and 4.
Adjust the installation by changing the position.

However, in such a structure, two magnetic switches are required to provide the water level width, which complicates the structure and lowers reliability.

In addition, if only one fixed magnetic switch is used, the water level width is fixed and very narrow, so the pump start-up and
Frequent stoppages may result in unstable operation, which may lead to damage to the pump.

The present invention eliminates the above-mentioned drawbacks of the conventional method by fixing a magnetic deterrent that prevents ferromagnetic materials in close proximity to the magnet passage, and prevents magnetism from acting against external forces such as buoyancy, gravity, and inertia. By applying the attractive force of
It is an object of the present invention to provide a water level control device that suppresses the movement of a magnet and makes it possible, for example, to form a magnetic switch operating water level width with one magnet switch.

The present invention includes a float that is provided with magnets in an interlocking manner, one or more magnetic switches that are provided at a predetermined position close to a magnet passage through which the magnets pass, and a float that is provided at a predetermined position close to the magnet passage. This is a water level control device characterized by comprising a magnetic deterrent that is more powerful than one or more ferromagnetic materials fixedly provided to the water level control device.

The present invention will be explained with reference to the drawings as an example.jf = 2nd
In the figure, only one magnetic switch 8 is provided as a detector at a predetermined height of the guide cylinder 13.

At almost the same height as the magnet switch 8, install the guide tube 13.
A magnetic deterrent body 9 is provided in contact with.

The magnet deterrent body 9 is made of a ferromagnetic material such as iron, copper, or an iron alloy, and is fixed at a predetermined position close to the magnet passage. A strong magnetic attraction is generated.

The details of the vicinity of the magnetic switch 8 are shown in FIGS. 3 and 4. Inside the magnetic switch 8, a magnetic element 5 is supported by a shaft 14 so as to be rotatable in a horizontal plane.

Around the guide tube 13, a magnet restraining body 9 having a thickness t1 and a width is provided over a center angle O and having a similar eccentricity e in the height direction from the center line 15 of the magnet element 5.

The magnet 2 has poles at the upper and lower ends (in this embodiment, the top is the S pole), and 16 is the center.

To explain the operation, initially, the water level is at the bottom, the magnet 2 is located far below the magnet element 5 as shown in FIG. 4, and the N pole of the magnet element 5 is shifted to the right as shown in FIG. Suppose we are in a state of

In FIG. 5, which shows the relationship between the water level and the height of the magnet 2, this state is indicated by ■.

The line shows the movement of the magnet when it is not constrained by anything.

When the water level rises and the S pole of the magnet 2 approaches the magnet deterrent 9, the magnet 2 is absorbed by the mutual magnetic force and moves somewhat ahead of the rise in the water level (however, this advance and the water level The advance during descent is not shown in FIG. 5).

When the water level further rises and the S pole of the magnet 2 approaches the center of the magnet deterrent 9 (this state is ■),
Even if the mutual magnetic attraction becomes large and the water level rises and the buoyancy increases, the magnet 2 is restrained and the floating of the float 1 is restrained.

If the water level continues to rise, the float 1 will sink, the buoyancy will increase, and at a certain water level, the buoyancy will overcome the magnetic deterrent force (this state is ■), and the magnet 2 will rise suddenly.

During this excessive upward movement, the N pole of the magnet 2 passes in front of the N pole of the magnet element 5, and this state (■) occurs. At this time, the N pole of the magnet element 5 moves to the left in Fig. 3 due to magnetic repulsion. When pressed, the magnetic element 5 rotates clockwise, generates a detection signal, and stops the pump.

Magnet 2, released from the magnetic deterrent force, returns to line AB
It rides on the top (this state is ■), moves on the dose line AB where the water level continues to increase due to the time lag until the pump stops, and then stops.

(This condition is ■). Thus, when the water level falls, the magnet 2 moves down along line AB.

Even after passing ■, continue along line AB.

When the N pole of the magnet 2 approaches the magnet deterrent 9, the movement of the magnet 2 somewhat precedes the fall of the water level due to the mutual attraction force.

When the water level further falls and the N pole of the magnet 2 approaches the center of the magnet deterrent 9 (this state is ■),
Even if the mutual magnetic attraction becomes large and the water level falls, the buoyancy decreases and the apparent weight increases, the magnet 2 is restrained and the float 1 is restrained from sinking.

If the water level continues to fall, the apparent weight increases, and at a certain water level, the apparent gravity overcomes the magnetic deterrent force (
In this state, (1) the magnet 2 falls together with the float 1;

During this falling process, the S pole of the magnet 2 passes in front of the S pole of the magnet element 5, and this state is (■), and at this time, the S pole of the magnet element 5 is pushed leftward as shown in Figure 3 due to magnetic repulsion. and the magnet element 5 rotates counterclockwise,
It emits a detection signal and starts the pump.

Magnet 2, released from the magnetic deterrent force, returns to line AB
It rides on the water line AB (this state is (l￥＠), and the water level continues to decrease due to the time lag until the pump starts, etc.) and stops (this state is ■).

Such control is automatically performed, and the water level in the tank 7 is maintained within the range of the water level width B between the highest water level W) (and the lowest water level WL) by the action of one magnetic switch 8. drooping

For reference, the operation of a conventional device that does not include the magnetic deterrent body 9 will be described.

The magnet element 5 also has the effect of suppressing the vertical movement of the magnet 2 by magnetic force, but if we ignore this effect and consider that the magnet 2 moves up and down in a free state, the magnet 2 moves in a line due to the rise and fall of the water level. Go up and down only along AB.

At that time, at 0 when rising, at @ when falling,
Magnetic switch 8 is actuated to issue a signal to stop or start the pump, respectively.

That is, the water level width in this case is B'.

As shown in Figure 5, the water level width B in the conventional type
was very narrow, and the absolute values of the ice level width B' and the highest water level W' H1 and the lowest water level W' □ could not be adjusted, making it unstable and having a narrow range of application.

On the other hand, in the present invention, the material, dimensions (thickness t, width b, center angle 0) and mounting position (eccentricity e1, distance from magnet 2) of the magnet deterrent body 9 can be selected. , the highest water level WH or the lowest water level WL by changing the strength of the deterrent force and the state of action distribution along the vertical direction of the deterrent force.
The height can be adjusted.

If there is no restraint, the water level when the center 16 of the magnet 2 coincides with the center line 15 of the magnet element 5 is the reference water level W.
If O, then with respect to the reference water level Wo, the upper water level width BR to the highest water level WH and the lower water level width BL to the lowest water level WL
It is also possible to arbitrarily adjust each of them independently, and the range of application becomes extremely wide, and the water level can be controlled under the most suitable control conditions.

The magnet 2 does not need to be directly and interlockingly attached to the float 1, but may be connected in a correspondingly interlocking manner, for example, by a displacement transmission mechanism such as a link mechanism.

FIG. 6 shows another embodiment in which the magnetic deterrent body 10 is used for braking.

The magnet switch 8 is for high water level alarm, and the magnet switch 11 is for low water level alarm.

If the distance between the magnetic switches 8 and 11 for high and low water levels is narrow, if the magnet 2 and float 1, which are released from the restraint of the upper magnetic restraint body 9 when the water level falls, fall, the magnetic restraint body 10 If not, there is a risk that the dropped float 1 will sink further below the position where it should rest due to inertia, and the magnet 2 will approach the low water level magnet switch 11, causing it to malfunction.

The magnet deterrent body 10 is provided to prevent this malfunction, and can perform braking to prevent the fallen magnet 2 from overlining downward.

The present invention includes a float that is provided with magnets in an interlocking manner, one or more magnetic switches that are provided at a predetermined position close to a magnet passage through which the magnets pass, and a float that is provided at a predetermined position close to the magnet passage. By providing a magnetic deterrent that prevents one or more ferromagnetic materials from being fixed to To provide a water level control device that can provide a water level width and reliably brake the movement of a magnet, performs stable control, can be applied to an extremely wide range, and has a simple structure. This has an extremely large practical effect.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an explanatory diagram of an embodiment of the present invention, Figs. 3 and 4 are a plan view and a front view of the vicinity of the magnetic switch, and Fig. 5 is an operational plan thereof. FIG. 6 is an explanatory diagram of another embodiment of the present invention. 1...Float, 2...Magnet,
3, 4...Magnetic switch, 5...
・Magnetic element, 6...Float case, 7
...Tank, 8...Magnetic switch, 9...Magnetic deterrent, 10...
・Magnetic deterrent body, 11...Magnetic switch, 12...Connecting rod, 13...Guide cylinder, 14...Shaft, 15...・Center line,
16... Center.

Claims (1)

[Scope of utility model registration request] a float provided with magnets in an interlocking manner; a single or plural magnet switch provided at a predetermined position close to a magnet passage through which the magnet passes; and a float fixed at a predetermined position proximate to the magnet passage. A water level control device characterized by comprising a magnetic deterrent formed from one or more ferromagnetic materials.