JP2007170367A - Automatic stopper for siphon type pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a siphon type pump that uses no electric or other power automatically stop at a desired level without using any special operation such as pressure, tight closure, etc. <P>SOLUTION: The automatic stopper is provided with a float 3 to sense a liquid level and an air valve 2 operating in conjunction with the float 3. The float 3 dips in the liquid to make its buoyant force push up and open an air valve to break the siphon state and automatically stop the pump operation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a kerosene pump and other siphon type liquid moving devices.

Siphon pumps with a simple structure are often used when transferring liquid from one tank to another, but these only move the liquid without a power source.

After pump operation, the moving liquid continues to flow out until the liquid level in both tanks is approximately the same level. If it is left as it is, the liquid overflows, the surroundings are soiled, and the contents are very dangerous.

These siphon pumps need to be monitored until the moving liquid reaches the proper amount, and must be stopped manually, but manual stop is somewhat troublesome and sometimes it flows out more than the proper amount or sometimes overflows. There are things that will let you.

In addition, the following patent documents 1, 2, and 3 and the utility model literature 1 can be mentioned as a well-known technique relevant to this invention.
JP 2001-271740 A JP 2003-074500 JP 7-310667 A

Utility model document 1

5-66,300

As described above, the conventional siphon pumps must be constantly monitored for stoppage, and there is a danger that the stoppage will eventually overflow because it takes some time and effort.
This can cause serious accidents if the liquid is flammable or irritating.

The present invention pays attention to such points, and an object thereof is to automatically stop the movement of the liquid by a fixed amount without requiring hermetic pressure or a power source when moving the liquid.

In addition, when manually stopping at an arbitrary amount, even a single little finger can be stopped immediately.

Easy to attach and detach, thin equipment, and can be used for tanks with small entrances.

  The automatic stop device of the present invention that achieves the above-mentioned object has a float that detects the amount of liquid and an air valve that operates in conjunction with the float. It is characterized by breaking the siphon state and automatically stopping the pump.

By extending the rod connected to the air valve, the pump can be easily manually stopped at any liquid volume.

As described above, according to the present invention, a siphon pump that does not use a power source can be automatically stopped at an appropriate amount without performing special operations such as pressurization and sealing. Overflow can be prevented.

Even tanks where the amount of liquid such as metal cannot be seen from the outside can be replenished without overflow by automatic stop.

In the case of manual stop, even a single little finger can be easily stopped, and there is no need to attach a stop air cap to the pump body.

The float is stored in the apparatus, and only moves in the vertical direction and does not move to the side. The float does not come into contact with the tank wall and cannot be stopped. It is also difficult to break.

A movable part such as a float does not have a rotating part or attachment part, and has a structure in which it is placed on the air valve by its own weight.

  Since the float slides in the vertical direction, it does not take up any space on the side, so that the device can be integrated with the liquid discharge section finely, so that the float does not get in the way of installation and can be used for a tank with a small entrance.

  The air valve when the pump is operating is closed in the vertical direction due to gravity, so there are few malfunctions during replenishment due to air leakage.

Once stopped, liquid will not leak without permission unless manual recovery is performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an enlarged cross-sectional view of an external appearance and a main part showing an embodiment for carrying out the present invention.

As shown in FIG. 1, the automatic stop device is installed integrally with a discharge port of a conventionally used siphon-type pump, and an air pipe 1 is attached from the device to a compression / decompression unit above the pump.

The lower end of the air pipe 1 has an upward concave cup shape as shown in the figure, and an air valve 2 is formed by a convex lid integrated with the rod 4 from above. When the amount of liquid is small, the convex part is pressed vertically against the cup-shaped part by the weight of the float 3 and the rod 4 and the accompanying device, and the air valve 2 is closed. When the pump is operated in this state, a siphon state is entered and the liquid flows out.

Even if liquid flows into the air pipe 1 from the pump, it overflows from the recess of the air valve 2 and goes down the pipe 5 passing through the rod 4 and enters the tank on the supply side. The pipe 5 also has a role of preventing the flow of the discharged liquid from obstructing the movement of the float 3 and the rod 4 or blowing it up to the upper air valve 2.

When the liquid flows through the discharge pipe 6 from some discharge ports 7 to the tank on the replenishment side, the liquid level rises, and the float 3 is soaked in the liquid and lifted upward by buoyancy through the connected rod 4 When the air valve 2 is opened, air flows into the compression / decompression unit at the top of the pump through the air pipe 1 through the rod hole formed in the partition wall 9, so that the siphon state is broken and the pump automatically stops.

To manually stop at an arbitrary amount, the air valve 2 is manually opened by gently lifting the grip 8 attached to the tip of the rod 4 to break the siphon state and stop the pump.

The float 3 and the rod 4 and their associated parts are restricted in movement by the partition wall 9 of the apparatus and do not move above a certain height, so that the air valve 2 does not slip out of the convex part and the concave part. .

The air pipe 1 can be affixed to or passed through the discharge pipe 6 to improve the appearance and function.

Reference numeral 10 denotes a claw-like stopper made of an elastic member that fixes the pump and the stopping device at a predetermined position. It is used by hooking on the protruding part of the tank, etc. It also has the role of ensuring the position of the liquid surface that stops automatically, eliminating the need to keep the pump body and discharge part fixed by human hands. It is added to the pump and automatic stop device according to the size of the tank entrance.

It is an expanded sectional view of a pump part appearance and main parts concerning an embodiment of the invention.

Explanation of symbols

1 Air pipe 2 Air valve 3 Float 4 Rod

Claims (4)

A siphon-type liquid pump automatic stop device with a vertically installed air valve that works with the slide of the float. A siphon-type liquid pump stop device that can stop the pump with an arbitrary amount of liquid even with a weak force of one little finger by the extension rod connected to the valve. Pump stop device that does not require special installation such as pressurization and sealing, and can be used with a simple fixture. A stop device that can be used for tanks with narrow entrances because the device and the liquid discharge unit are integrated in a rod shape.

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