JPS58160819A - Alarm device for liquid level - Google Patents

Abstract

PURPOSE:To obtain an alarm device for overflow which is free from the danger for generating electric sparks or the like, by connecting a float for detecting liquid levels and an alarm sound generator by mechanical means in a tank which stores liquid, such as gasoline, having the danger for firing and explosion to the tank buried under the ground. CONSTITUTION:When liquid is charged into a tank 4, the liquid level rises and a float 7 is lifted. The float 7 rises together with a transmitting lever 6, thereby releasing a detaining piece which prevents the clockwise rotation of a rotary disc 9. The disc 9 is rotated clockwise by the restoring force of a coil spring and a projecting part 12 forces a detention moving piece 22, that is, an impact rod 19 downward against the energizing of a spring 30. When the disc 9 rotates further and the projection 12 exceeds the position of an alternate long and two short dashes line, the projection 12 disengages from the piece 22; therefore, the rod 19 is displaced this time upward by the restoring force of the spring 30 and a chip 20 strikes against a cover 2, thereby producing a large sound (alarm sound) and announcing the danger for overflow.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid level warning device that is particularly effective when storing a liquid that may be flammable or explosive, such as liquid, in a tank buried underground.

In recent years, some gas stations have started using a type of needle that electrically detects the amount of liquid remaining in the tank and can be used in offices.

This remaining amount hand not only displays the remaining amount, but also alerts you that replenishment is required when the remaining amount falls below a certain value, and warns you of the danger of overflow when the remaining amount exceeds a certain value when refilling the tank. is included.

However, these devices@ not only have expensive detection sections and display sections, but also require a power source for the detection S, and also require a signal line for transmitting the 111 signal.

If the stored liquid is gasoline, electrical sparks can lead to a major accident, and explosion-proof equipment is required. Signal lines must be excavated into the concrete floor, and the construction must be explosion-proof. Therefore, construction costs are also high.

The present invention focuses on the overflow notification, which is the most dangerous of the above specifications, and is proposed to solve the above problems.It does not use electricity, therefore there is no risk of electrical sparks, and no signal line is required. A liquid level detection means that is installed in the recess as seen briefly and detects a rise in the liquid level in the tank, a locking means that locks the elastic member in a stored state, and a striking means that hits the lid of the recess. When the liquid level detecting means detects a rise in the liquid level, the locking of the elastic member by the locking means is released, and the restoring force of the elastic member drives the striking means to close the recess. It is designed to strike.

The illustrated embodiment will be described below.

(1) is a depression dug in the ground (hereinafter referred to as a manhole), which is always closed with a metal cover (2) made of iron plate or cast iron, and an alarm device (3) is installed inside. has been done.

There is a tank (4) buried below the manhole (1) that stores liquids such as gasoline, and an alarm device (3).
) is connected by the tank (4) and the connecting pipe (5),
A float (7) is attached to the tip of a transmission rod (6) that extends from the alarm device (3) through the connecting pipe into the tank (4).

(8) is a housing for the alarm device (3), which houses equipment to be described later. (9) is a rotary plate, which is integrally fixed by a rotating shaft αq passing through the nozzle (8) and a pin θυ, and has protrusions QJ, n, and (6) formed around it.

All are formed on one side of the rotary plate (9), and around the boss O which is a nine cylindrical part, an elastic member, that is, a spiral spring αη is wound with its inner end fixed to the boss σQ,
Its outer end is fastened to a pin embedded in the housing (8) K.

The hammer is a striking rod that passes through the housing (8) in the upper and lower directions, and the upper end is made of a metal tip (1) that is hard, such as copper alloy, and does not generate sparks when struck.
is attached and is constantly urged upward by a spring (7).

The striking rod U1 is pivotally supported by a pin at approximately the middle part of the striking rod U1, and is rotatable approximately 90 degrees clockwise around the pin.
There are 9 katane (handle) attached.

＠ rotates the rotating shaft QQ from the outside of the housing (8), cI4 is a bellows that prevents steam in the tank (4) from entering the housing (8), A retaining ring restricts the descent and ascent of the transmission rod (6), @ is a retaining ring that restricts the ascent of the striking rod m, @ is an O-ring for sealing, and @ is the lid of the housing (8).

In the above configuration, when the rotary plate (9) is rotated counterclockwise as shown in FIG. 2, the square wound spring αη is tightened (charged). At this time, the locking piece α
The bottom moves up and down along the shape of the retaining teeth (C) together with the transmission rod (6) and the float (7).

Figure 2 shows a state in which this spiral spring assistant is wound tightly, the manhole (1) is closed with the lid east 2), and the tip (E) is in contact with the lid (2). The rotation of the rotating plate (9) in the clockwise direction due to the restoring force causes the engaging tooth (to) to move towards the i! of the engaging piece α. It is blocked by hitting 1lI11[i.

Next, when the liquid is poured into the tank (4) and the liquid level rises, the float (7) is lifted and there is a risk of overflow. 1. The float (7) is connected to the transmission rod (6), Since it rises together with the locking piece rA4, the locking piece α
The engagement 1m (2) by ◆, that is, the prevention of clockwise rotation of the rotary plate (9), becomes one point. Then, the rotating plate (9)
is rotated clockwise by the restoring force of the spiral spring Oη, but at this time, the protrusion (6) pushes down the stationary piece), that is, the striking rod 4, against the bias of the spring (1) w
). Furthermore, the rotary plate (9) rotates and the protrusion (6)
When exceeds the position of the two points @ line, the protrusion (6) comes off from the stationary piece ( ), so this summer it striking rod Ql is displaced upward by the restoring force of the spring, and the tip ( ) becomes Vii (2). Because of the collision, 1ll(2) emits a loud sound (alarm sound) to notify that there is a danger of overflow.

This alarm sound continues until the spiral spring Qη is completely restored. Note that this alarm device (3) can also be used by incorporating it into a fuel gauge of the on-site indication type, and the manhole, that is, the recess includes a recess to the extent that no one can enter.

With the structure described in detail above, an inexpensive and easy-to-install alarm system that can reliably notify the danger of overflow without the danger of electrical sparks or the like, and without the need for large-scale installation of signal lines. That's what you get.

[Brief explanation of drawings]

Figure 1 shows the alarm device installed in a manhole.
4@2 is a cross-sectional view of the 11@ device, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2. (1)... Manhole (2)... Turnip (3)...
Alarm device (4)...Tank (7)...Float (
9)...Rotating plate (2)...Protrusion Q7)...Spiral spring On...Blow rod (foundation)...Locked cantilever license applicant Tominaga Seisakusho Co., Ltd. Figure 3

Claims (1)

[Claims] A liquid level detection means installed in a recess equipped with a closing lid, a liquid level detection means for detecting a rise in the liquid level in the tank, a locking means for locking the elastic member in a stored state, and a mechanism for striking the recess. When the liquid level detection means detects a rise in the liquid level in the tank, the elastic member is unlocked by the locking means, and the elastic member's restoring force causes the striking means to A liquid level warning device configured to drive and strike the lid of a recess.