JPS59205121A - Float switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a float switch, and more particularly to a float switch configured to operate a liquid level detection switch by a switch operation unit linked to one float at the upper and lower limits of the liquid level. In the present invention, an attempt is made to obtain a convenient device that allows the liquid level detection switch to be operated arbitrarily by external operation even when the liquid level is in an intermediate range between the upper limit and the lower limit.

Conventionally, in the above-mentioned float switch, two floats are suspended above and below the main body of the switch by a predetermined interval, and when the liquid level in the tank rises to the upper float part (at the upper limit) and the lower float part The change in the buoyancy of the float when the liquid level has dropped to the lower limit (at the lower limit) activates the switch operation part in the float switch body, and opens or closes the liquid level detection switch. Since the switch operating section is operated only by the movement of the VC70, when the liquid level is between the upper limit and the lower limit, the switch operating section does not operate.

Therefore, under conditions where the liquid level is in the above intermediate range,
- When supplying water to test the operation of a switch or adjust the liquid concentration, the current situation is to directly push up a float in the tank to forcibly operate the switch operation part.

However, pushing down the float is a cumbersome task, such as the need to remove the tank lid, and, especially in the case of large tanks, involves dangerous work such as having to lean into the tank. Ta.

In view of the above-mentioned circumstances, the present invention provides a convenient float switch that can arbitrarily and easily operate the switch operation part, and has a configuration that operates a liquid level detection switch in conjunction with the float; 4-switch operation; The present invention is characterized in that a forcible actuating member is provided which can actuate the switch operating portion independently of the movement of the float.

Next, embodiments of the present invention will be illustrated below with reference to the drawings.

(g) shows the entire float switch according to the present invention, in which the crest indicates the flow rate due to the change in the upper part of the tank (1). This is used to open and close the surface detection switch (3), and in the case of the figure, the float tl)
(Slide axis CI!1 with 11vc surface connection), arm (2) whose tip is connected to slide @en and rotates around the fulcrum (→) with the vertical movement of slide @v1), and arm (A). It is composed of lever members that are rotatable around the fulcrum (υ) in parallel.The above lever member @
One end (→ is connected to the rotating tip side of the arm @ via a spring (c), and the liquid level is lower flow)
The il+' part (lower limit position of liquid level) is lowered by the lever, and the rotating tip of the arm (A) and the tip of the spring (C) fixed thereto rotate to a predetermined position below one end of the lever member - (C). Then,
The other end (ψ) of the lever member @ is pushed up by the compression action of the spring (c) and rotates clockwise all at once, and the lever member @ (d) presses the operation lever 6υ of the liquid level detection switch (3) to release the liquid. Close the surface detection switch (3).

On the other hand, when the liquid level rises to the upper float 1) portion (liquid level upper limit position) and the rotating tip of the arm @ and the tip of the , the lever member (C) is rotated counterclockwise all at once by the compression action of the spring Q4 and returns to the state shown in Fig. 1).Then, the pressure on the operation lever 6υ of the liquid level detection switch (3) is released and the liquid level is The operating state of the detection switch (3) (41 is a forced activation member extending upward from the end of the slide shaft (211; in the case of the figure, a shaft-shaped pressing member 11 that can freely slide up and down) VC. By pressing the pressing member f4]J from the outside, the tip of QzO is pushed down to A, and the lever lever is rotated to activate the liquid level detection switch (
3) can be operated arbitrarily. (421 is a suppression member (
It is a locking member with 9 digits of VC around 41J, which holds the pressed down suppressing member (4D) as it is, the lower part is split cylinder-shaped, the outer periphery is formed with a taper screw (bamboo), and the lever (43 ) is structured so that the inner diameter can be tightened by turning σJ!

By operating the locking member (42), even if the liquid level rises to the upper part 70-t (1), the liquid level detection switch (3) can remain in the operating state. It is a child stool when you want to overflow. (45) is a spring for returning the suppressing member (41).

Note that the forced actuation member (4) is not limited to what is shown in the drawings, and may be configured to operate the switch operating portion (2) from the side of the float switch body (f), for example, using a link mechanism. (not shown) 0 In addition, in the embodiment shown in FIG. 2, a molded coil (a) for a solenoid cylinder is provided around the upper part of the suppression member According to this, even if the tank (g) is buried in a pit or located far away, the forcible activation member (g) can be pushed down.
4) can be controlled remotely, making it even more convenient to use. The control current for the above-mentioned coil (A) is a DC current of 100 to 200 cm, which is obtained by converting the AC current, which is the supply current, to DC using a silicon diode (S) built into the coil (B). Electric current is used.

Furthermore, in addition to the illustrated limit switch, a proximity switch may also be used as the liquid level detection switch (3).

According to the float switch according to the present invention configured as described above, the forced activation member (41) that can independently actuate the switch operation section (2) operates the liquid level detection switch (3). Since the tank (T) is equipped with a
Even if the liquid level is in the middle range, you can optionally turn on the liquid level detection switch (3).
)! Now that I can do 1υJ, I made a float switch! Water supply for ljJ tests, liquid level concentration adjustment, etc. can be easily and quickly performed using the above-mentioned forced +1ρ3 operation (4), which eliminates the tedious labor and danger of conventional EfFr when directly pushing down the float. This will eliminate work.

Furthermore, even if the liquid level detection switch (3) is actuated by the forced activation member 141K, the float +IJ (1+) can normally move up and down freely, so the liquid level detected by the float (1) (11) when the liquid level rises to a predetermined level is The release of the surface detection switch (3) can also be performed in the conventional manner, and does not cause any inconvenience in use.

Furthermore, the forced actuation member (4) has a very simple structure and can be installed in the current float switch with a slight design change, so that the impact on product cost is small.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is a cross-sectional view, and FIG. 2 is a cross-sectional view of a main part showing a modification. (1) Upper float (11 Lower float Patent applicant Sekisui Plastics Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1. A forced activation member is provided for the switch operation section that operates the liquid level detection switch in conjunction with the float, which can independently operate the switch operation section independently of the movement of the float. float switch. 2. The float switch according to claim 1, wherein the forced actuation member is constituted by a shaft-shaped suppressing member that slides up and down.