JPS6026839Y2 - Pump valve device used for vertical and inverted sprayers, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a valve device for a pump used in a sprayer for both normal and inverted use.

Conventionally, a manual sprayer includes a container containing a liquid, a manual reciprocating pump for delivering the liquid to the container, and a spray nozzle connected to the pump to atomize and spray the liquid in the container to be delivered by the pump. It consists of

Usually, the pump is inserted into a container and fixed to the mouth of the container, and the pump has a suction pipe at the lower end,
The lower end of this pipe ends near the bottom of the container.

Therefore, if this manual sprayer is turned upside down, the lower end of the suction pipe will come out into the air inside the container, and unless the pump is specially equipped, the pump will suck in the air in the container, making it impossible to obtain a spraying effect. do not have.

Therefore, in a manual sprayer for both normal and inverted positions, an air blocking valve is provided below the suction valve at the bottom of the reciprocating pump, and the air blocking valve prevents air intake when the pump is inverted.

The present invention particularly relates to this valve arrangement of the suction valve and the air blocking valve.

Note that when the pump is inverted, liquid is sucked into the pump through a different route from another suction port that is submerged in the liquid in the inverted container.

Now, the above-mentioned suction valve and air blocking valve are oriented in opposite directions to each other, and a ceiling is used for these valves, and these ceilings move under their own weight depending on the posture, and when in an upright posture,
The suction valve is in a closed state and the air check valve is in an open state, and in the inverted position, the suction valve is in an open state and the air check valve is in a closed state.

Therefore, in the upright position, the air check valve does not work at all, and the suction valve opens due to negative pump internal pressure, that is, acts as a normal suction valve.In the inverted position, the air check valve closes and the air is removed. Suction is blocked and the suction valve is opened, but
In particular, when the pump internal pressure becomes positive, the ceiling of the suction valve is pushed up and closed by the positive internal pressure, thereby preventing any hindrance to fluid pressurization of the pump.

However, with conventional suction valves and air check valves, if the ceiling is light due to small size or material, the adsorption of the liquid remaining between the closed ceiling and the valve seat due to surface tension and viscosity may occur. This may cause the ceiling to stick to the valve seat, and even if the position is changed, the ceiling will not fall and move under its own weight, making normal operation impossible.

The present invention attempts to eliminate such conventional drawbacks.

The illustrated embodiment will be described below.

In the figure, 1 is a cylinder of a plunger-type vertical reciprocating pump A in a small manual sprayer for both vertical and inverted positions, 2 is a suction valve provided at the bottom of the cylinder 1, and 3 is an air blocking valve provided further below the suction valve 2. , 4 is an insertion rod provided above the suction valve 2.

The suction valve 2 has a valve box 21 formed by a small cylinder 22 fitted into the lower part of the cylinder 1 and a lower part of the insertion rod 4 fitted into the upper end of the small cylinder, and a tapered valve facing upward in the lower part of the small cylinder 22. Taking the form of seat 23,
The lower part of the insertion rod 4 opens into the small cylinder 22, that is, into the valve chamber 24 at the center of its lower surface, and extends from the valve chamber 24 to the upper part 1 inside the cylinder.
1, a Tamano stopper 42° 42 is provided protruding around the opening of the liquid passage 41 to the valve chamber 24, and a ceiling 25 is movably inserted into the valve chamber 24. .

The air blocking valve 3 has a valve box 31 formed below the suction valve 2 by the lower end of the small cylinder 22 of the suction valve 2 and the cylinder 1 itself,
At the lower end of the small cylinder 22, a tapered valve seat 33 facing downward is formed in close proximity to the suction valve seat 23, and the valve hole 26 of the suction valve 2 is used as a common valve hole. In the chamber 34, a tamano saucer 32 is provided below the valve seat 33, and a suction pipe fitting tube 1 at the lower end of the cylinder is placed around the tamano saucer 32.
A ceiling 35 is movably inserted loosely onto the inner ball valve saucer 32 of the waist valve chamber 34 forming liquid flow paths 36, 36 leading to the valve chamber 2.

Note that 5 in the figure is a tubular plunger, and by moving this up and down, the internal pressure in the upper part 11 of the cylinder 1 becomes positive and negative, thereby obtaining a pumping action.

6 is a suction pipe fitted into the suction pipe fitting tube 12 at the lower end of the cylinder and hangs down; 13 is a small hole for adjusting the internal pressure in the container; this small hole also serves as a liquid suction port when falling down. .

At the upper part of the tubular plunger 5, there is a discharge valve (not shown), and further there is a spray head at the upper end.

The reciprocating pump A is used by being inserted into a container containing a liquid and fixed to the mouth of the container, with the lower end of the suction vibro reaching close to the bottom of the container.

Therefore, when the tubular plunger 5 is moved up and down in an upright position, the air blocking valve 3 does not work at all, the suction valve 2 simply operates as a normal one, and the cylinder 1 along with the discharge valve
When the pressure is negative, the liquid inside the container is sucked up into the cylinder 1 via the suction vibro, and when the pressure is positive, the liquid inside the cylinder 1 is atomized and ejected from the spray head.

At this time, the ceiling 35 of the air prevention valve 3 is above the Tamano saucer 32, and the liquid to be sucked up passes through the liquid flow path 36, 36 around the Tamano saucer 32, so no upward force is applied to the ceiling 35. , and there is no way to make this dance.

Next, when placed in an inverted position, the ceiling 35 of the air check valve 3 seats on the valve seat 33 and closes it, so that the air in the container does not enter from the suction vibro, and the suction valve 3
The ceiling 25 is separated from the valve seat 23 and the Tamano stopper 42.4
Supported by 2.

When the tubular plunger 5 is moved up and down in this inverted position, the negative pressure inside the cylinder 1 is brought about by the closing of the air blocking valve 3 and the closing of the discharge valve, and at the time of this negative pressure, the liquid in the container is submerged into the liquid. It flows into the cylinder 1 at once from the small hole 13 where the tubular plunger 5 passes through the small hole.

In addition, when the pressure is positive, the liquid in the cylinder 1 causes the suction valve 2 to
Since the ceiling 25 of the cylinder 1 is pushed up and the suction valve 2 is forcibly closed, the liquid inside the cylinder 1 is pressurized without any problem and is ejected as mist from the spray head.

By the way, when switching between upright and inverted positions, the ceilings 25 and 35 of the suction valve 2 and air shutoff valve 3 fall and move due to their own weight, but at that time, the side seated on the valve seat 23 or 33 It remains between the ceiling and the valve seat.

Even if the valve seat is covered with liquid, it will be forced down by the falling ceiling of the other side.

According to this proposal, the valve body is lightweight due to its small size and material, and the valve body adheres to the valve seat due to adsorption due to the surface tension and viscosity of the liquid remaining between the closed valve body and the valve seat. do,
There is no possibility that the valve body will fall or move when switching between normal and inverted postures, and normal operation can always be obtained.

It is simple in structure and manufacture, and is extremely useful in practice.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view, and FIG. 2 is a side view of the same. 1...Cylinder, 2...Suction valve, 3...
...Air blocking valve, 25. ．． 35... Ceiling, 23,33... Valve seat.

Claims (1)

[Scope of utility model registration request] In the valve device of a pump used in a sprayer for both normal and inverted positions, the valve bodies of these valves fall and move under their own weight when the posture is switched between normal and inverted positions. A valve device for a pump used in an upright and inverted sprayer, etc., characterized in that one valve body sitting on a seat is forcibly pushed down by the other valve body that falls as the posture is changed.