JPS5824640B2 - liquid pumping machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, when a certain amount of liquid flows into a liquid storage chamber, a packet floats up to send pressurized gas into the liquid storage chamber, and the liquid in the liquid storage chamber is pumped by the pressure. This invention relates to a liquid pump configured to pump liquid to a target device.

The present inventor previously filed a patent application (Japanese Patent Publication No. 55-29279) regarding this type of liquid pumping machine, and the present invention aims to further improve the structure thereof.

The above-mentioned liquid pumping machine, which was previously filed and patented by the present inventor (Patent No. 1043515), has a right cylindrical packet with an open top surface placed in a liquid reservoir so that it can float and sink, and its floating motion causes the liquid to flow. This system was designed to operate a supply/exhaust switching device for pressurized gas for pressure feeding, but it had the following drawbacks.

In other words, in the conventional right cylindrical packet with an open top surface,
When the packet floats due to the liquid flowing into the liquid storage chamber, the liquid flows around to the bottom of the packet, causing the water level in the liquid storage chamber to drop suddenly.As a result, the buoyancy of the packet increases in approximately direct proportion to the floating height of the packet. becomes smaller.

For this reason, the force necessary to operate the valve element for switching operation of the air supply/exhaust switching device may not be obtained, and there is therefore a risk that the valve element may be stopped at an intermediate position, resulting in incomplete operation.

Therefore, the first object of the present invention is to suppress the decrease in buoyancy as much as possible even when the packet floats, and to ensure that the air supply/exhaust switching device operates reliably.

Furthermore, when the capacity of conventional packets with open tops is increased to increase buoyancy, the amount of liquid that can be stored in the feces storage chamber decreases, and the amount of liquid pumped decreases accordingly.

Therefore, in order to increase the amount of liquid pumped, it is necessary to increase the volume of the liquid storage chamber itself, which has the disadvantage that the entire device has to become large.

Therefore, a second object of the present invention is to make it possible to effectively utilize the upper space of the packet so that the amount of liquid pumped can be easily increased without increasing the volume of the liquid storage chamber.

Next, one embodiment of the present invention will be described in more detail with reference to the drawings.

In FIGS. 1 and 2, 1 is a liquid storage chamber sealed by a lid 2, and a packet 3 is placed in the chamber so as to be able to float and sink.The upper surface of the packet 3 is closed by a lid plate 4, and a cylinder 9 is established in the center. The cylinder 9 is connected to a switching lever 7 that hangs down from the air supply/exhaust switching device 6, which will be described in detail later.

That is, the flange 10 formed at the lower end of the switching rod 7 is slidably and loosely fitted into the inner periphery of the cylinder 9, and the inward small diameter portion 11 at the upper end of the cylinder 9 prevents the flange 10 from coming off. , connects the packet 3 and the switching lever 7.

Reference numeral 13 denotes a liquid outflow pipe that hangs down from the lid 2 of the liquid storage chamber 1 into the packet 3. The water flow pipe 12 has an open top end so that a water flow space 14 communicating with the inside of the packet 3 exists on the outer periphery of the fluid outflow pipe 13. erect.

15 is a check valve provided in the liquid outflow pipe 13.

Reference numeral 16 denotes a liquid supply pipe, and a check valve 17 and a hollow spherical auxiliary liquid reservoir 18 are connected in series in the middle of the liquid supply pipe, and the end thereof is connected to one side wall of the liquid reservoir chamber 1. do.

The upper part of the auxiliary liquid storage container 18 and the upper part of the liquid storage chamber 1 are communicated with each other by a small diameter ventilation pipe 19.

On the other hand, the supply/exhaust switching device 6 has a valve chamber 20 and a pressure chamber 21 separated by a partition wall 22, as shown in FIGS. A ventilation hole 23 communicating with the reservoir chamber 1 and an exhaust hole 24 open to the atmosphere are arranged side by side on the lower surface of the inner wall with a disk-shaped valve seat 25 as shown in FIG. Disc valve 26 on top of ventilation hole 23
A predetermined elastic supporting force by a coil spring 27 provided therein allows the support to be vertically movable to the extent that it is slightly separated from the exhaust hole.

Then, the switching lever 7 whose lower end is connected to the packet 3 as described above is inserted into this vent hole 23, and the outer periphery of the switching lever 7 is moved upwardly.
A stepped portion 28 is formed so as to be able to lift it up, and a bifurcated engagement fitting 30 is screwed onto the screw shaft portion 29 at the upper end.

31 is a pin 3 attached to the upper end of a support shaft 32 implanted in the valve chamber 20.
3, one end of which intervenes in the forked portion of the engaging metal fitting 30, and is prevented from being removed by a pin 34 that connects the two forked ends of the engaging metal fitting 30.

Further, the pressurized air chamber 21 has a connection port 35 connected to an appropriate pressure source, and the partition wall 22 is provided with a pilot valve 36 for allowing gas supplied from the appropriate pressure source to flow into the valve chamber 20.

That is, the pilot valve 36 is screwed into a female screw hole of the partition wall 22, and the lower end of the knock shaft 38 disposed in the cylindrical portion 37 so as to be movable up and down is positioned above the other end of the link member 31. A spherical valve 39 of a size capable of closing the upper end opening of the cylindrical portion 37 is arranged opposite to the upper end of the knock shaft 38, and a window hole 40 communicating with the pressure chamber 21 is opened around the valve.
A side hole 41 communicating with the valve chamber 20 is formed on the outer periphery of the cylindrical portion 37, and a head 42 formed in a square shape so as to be easily engaged with a tool such as a spanner is inserted upward from the upper wall opening of the pressure chamber 21. A screw lid 43 that protrudes and closes the upper wall opening is screwed onto this.

Reference numeral 44 denotes a large diameter portion formed at the middle portion of the knock shaft 38, and the large diameter portion 44 abuts on the small diameter portion 45 at the lower end of the cylindrical portion 37 to prevent the knock shaft 38 from falling off downward. hand(
・Ru.

Next, the operation of the liquid pumping machine configured as described above will be explained.

First, the liquid (hereinafter referred to as drain) is drained from the liquid supply pipe 16.

) pushes open the check valve 17 and flows into the auxiliary liquid storage container 18 and further into the liquid storage chamber 1, the drain accumulates around the outer periphery of the packet 3, and the water level gradually increases until the water level in the packet 3 increases.
The cylinder 9 is floated until the upper end of the cylinder 9 comes into contact with the lower surface of the window body 2.

(The state shown in FIG. 2 is reached.) When more condensate continues to flow in, the drain passes over the upper edges of the water pipes 5 and 12 and flows into the packet 3 through the water flow space 8.14.

As a result, the packet 3 becomes heavier and begins to sink.

If it begins to sink even slightly, the upper edge of the water pipes 5, 120 will drop below the water surface, and the inflow will become even more intense, causing the packet 3 to suddenly become heavier and sink all at once.

As a result, the inside of the packet 3 becomes full, and drain also accumulates on the top of the lid plate 4 of the packet 3.

At this time, since the cylinder 9 is integrated with the packet 3, it sinks at the same time and pulls the switching lever 7 downward via the collar 10 when the cylinder 9 descends by a predetermined play distance.

Therefore, the engaging fitting 30 at the upper end of the switching rod 7 pulls down one end of the link member 31 as shown in FIG. The pressurized gas in the pressure chamber 21 is caused to flow into the valve chamber 20.

Now, when pressurized gas flows into the valve chamber 20, the gas passes through the gap between the valve seat 25 and the disk valve 26 and begins to flow out into the exhaust hole 24, but since the gas passes through this small gap at high speed, the disk valve 26 is pulled downward and its suction force overcomes the elasticity of the coil spring 27, so the disc valve 26
is finally pressed against the valve seat 25 and closes the exhaust hole 24.

The pressurized gas that has no place to go passes around the switching lever 7 of the vent hole 23 and flows into the liquid reservoir chamber 1.
Pressurize the drain inside.

Therefore, the drain in the packet 3 is pumped up through the liquid outflow pipe 13, the check valve 15 is opened, and the drain is pumped to the target device.

(Figure 1 shows this state.

) When the drain inside the packet 3 flows out, the packet 3 becomes lighter and floats up.

At that time, the drain that was on the lid plate 4 of the packet 3 passes through the outer periphery of the packet 3 and is replaced below the packet 3. Also, after a predetermined play distance during this floating, the inner lower surface of the cylinder 9 comes into contact with the flange 10. In order to push up the switching lever I, the link member 31 is moved in the opposite direction as shown in FIG. 4, and the knock shaft 38 is lowered to stop the pressurized gas from flowing into the valve chamber 20. The portion 28 engages the disc valve 26 and moves the disc valve 26 away from the valve seat 25 so that the valve chamber 2
The pressurized gas in the chamber 1 escapes into the atmosphere from the exhaust hole, and the pressurized gas in the liquid storage chamber 1 also flows back through the ventilation hole 23 and escapes to the exhaust hole 24.

For this reason, the outflow of condensate from the liquid outflow pipe 13 is stopped, and the pressure inside the liquid reservoir chamber 1 also decreases, so that the condensate flows into the liquid reservoir chamber 1 from the liquid supply tube 16 again, and the packet 3 is removed. The object is further floated, and this process is repeated many times.

In addition, by installing the auxiliary liquid storage container next to the check valve of the liquid supply pipe, by changing its capacity, you can easily adjust the amount of drain pumped at the same time as changing the volume of the liquid storage chamber. It is possible.

At this time, a vent pipe communicating the upper part of the auxiliary liquid storage container and the upper part of the liquid storage chamber allows the drain in the auxiliary liquid storage container to easily flow into the liquid storage chamber.

As explained in the embodiments above, the liquid pumping machine of the present invention is designed so that when the packet sinks, the drain accumulates on the top of the lid plate of the packet, so even if the packet floats up, the liquid level does not drop. There are few.

For this reason, the drop in buoyancy during the process of the packet floating is very small, and for this reason, the force pushing up the switching actuating rod is sufficient to operate the pilot valve and the disc valve, even if the liquid outflow pipe is drained. Even if the packet becomes heavy during its ascent due to the backflow of air into the packet, it still has sufficient buoyancy and can operate the air supply/exhaust switching device reliably.

Furthermore, allowing condensate to accumulate on the upper part of the lid plate of this packet not only increases buoyancy but also increases the capacity of condensate that can accumulate in the liquid storage chamber, increasing the amount of condensate pumped. It has a possible beneficial effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the liquid pumping machine according to the present invention, in which Fig. 1 is a partially sectional front view thereof, Fig. 2 is an operating state diagram of Fig. 1, and Fig. 3 is a diagram showing the operation state of the supply/exhaust switching device. A vertical sectional view, FIG. 4 is an operating state diagram of FIG. 3, and FIG. 5 is a plan view of the valve seat. 1...Liquid storage chamber, 2...Lid body, 3...
...Packet, 4...Lid plate, 5...
Water pipe, 6... Supply/exhaust switching device, 7...
・Switching lever, 8...Water space, 9...
・Cylinder, 12... Water pipe, 13... Liquid outflow pipe, 14... Water flowing space, 15...
・Check valve, 16...Liquid supply pipe, 17...
··non-return valve.

Claims (1)

[Claims] 1 A liquid reservoir chamber sealed by a lid, a packet disposed so as to be able to float and sink within the liquid reservoir chamber, a liquid supply pipe connected to one side wall of the liquid reservoir chamber via a check valve, In a liquid pumping machine consisting of a liquid outflow pipe suspended from a lid into the packet and a supply/exhaust switching device installed on the top of the lid, the top surface of the packet is closed by a lid plate, and the center of the lid plate is closed. Establish a cylinder connected to a switching rod hanging from the supply/exhaust switching device, and erect a water pipe with an open top end so that there is a water flow space communicating with the inside of the packet on the outer periphery of the cylinder,
Furthermore, a liquid pumping machine characterized in that another water flow pipe with an open top end is installed upright on the outer periphery of the fluid outflow pipe so that a water flow space communicating with the inside of the packet exists.