JPS6127599B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, when a certain amount of liquid flows into the liquid storage chamber, a bucket floats to send pressurized gas into the liquid storage chamber, and the pressure is used to pump gas into the liquid storage chamber. The present invention relates to a liquid pumping machine 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 inventor applied for a patent first (patent number
1043515), a right cylindrical bucket with an open top surface is arranged in a liquid storage chamber so that it can float up and down, and its floating movement causes a supply/exhaust switching device for pressurized gas for pumping liquid. However, it had the following drawbacks.

That is, in a conventional right cylindrical bucket with an open upper surface, when the bucket floats due to the liquid flowing into the liquid reservoir, the liquid flows around the bottom of the bucket, causing the water level in the liquid reservoir to drop suddenly. The buoyant force of the bucket becomes smaller in direct proportion to the floating height of the bucket. For this reason, the force necessary to operate the valve element for switching 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 present invention aims to ensure that the supply/exhaust switching device switches and operates reliably even with the weak buoyancy of the bucket, so that a slight backflow of liquid from the fluid outflow pipe into the bucket does not cause operational failure. The purpose is to

Next, one embodiment of the present invention will be described in more detail with reference to the drawings. In Figs. 1 and 2, reference numeral 1 denotes a liquid reservoir chamber sealed by a lid body 2, and a bucket 3 is placed in the chamber so as to be able to rise and fall freely.The upper surface of the bucket 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 lever 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 is fitted.
This prevents the collar portion 10 from coming off and connects the bucket belt 3 and the switching rod 7. Reference numeral 13 denotes a liquid outflow pipe that hangs down from the lid 2 of the liquid storage chamber 1 into the bucket 3, and the top end of the water flow pipe 12 is open so that a water flow space 14 communicating with the inside of the bucket 3 exists on the outer periphery of the fluid outflow pipe 13. erected. 15 is a check valve provided in the fluid 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 connected to a small diameter ventilation pipe 1.
9.

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. The disk valve 26 is supported above by a predetermined elastic supporting force by a coil spring 27 provided in the ventilation hole 23 so as to be able to move up and down to the extent that it is slightly separated from the exhaust hole. Then, the switching lever 7 whose lower end is connected to the bucket 3 as described above is inserted into the ventilation hole 23, and the outer periphery of the switching lever 7 has a structure so as to lift the disc valve 26 when it moves upward. A stepped portion 28 is formed, and a bifurcated engagement fitting 30 is screwed to the screw shaft portion 29 at the upper end. Reference numeral 31 denotes a seesaw-shaped link member pivotally supported by a pin 33 on the upper end of a support shaft 32 implanted in the valve chamber 20, one end of which intervenes in the bifurcated portion of the engaging metal fitting 30, and The pin 34 connecting the two fork ends of the pin 30 prevents the pin from coming off. Also,
The pressure chamber 21 has a connection port 35 connected to an appropriate pressure source, and the partition wall 22 has a pilot valve 36 that allows gas supplied from the appropriate pressure source to flow into the valve chamber 20.
will be provided. That is, the pilot valve 36 is screwed into a female threaded hole in the partition wall 22, and the lower end of a 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 disposed opposite to the upper end of the knob shaft 38, and a window hole 40 communicating with the pressure chamber 21 is opened around the valve 39. A side hole 41 communicating with the valve chamber 20 is provided on the outer periphery of the pressure chamber 21, and a head 42 formed in a rectangular shape so that a tool such as a wrench can be easily engaged is provided in the pressure chamber 21.
A screw lid 43 that protrudes upward from the upper wall opening and closes the upper wall opening is screwed onto this. 4
Reference numeral 4 denotes a large diameter portion formed at the middle portion of the knob 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 knob shaft 38 from falling off downward. ing.

Next, the operation of the liquid pumping machine configured as described above will be explained. First, liquid (hereinafter referred to as drain) from the liquid feed 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, and then the liquid flows into the bucket 3. The water level accumulates on the outer periphery and gradually increases, causing the bucket 3 to float until the upper end of the cylinder 9 comes into contact with the lower surface of the lid body 2. (The state shown in Figure 2 is reached) When more condensate continues to flow in, the condensate flows through the water pipe 5,
The water passes over the upper edge of the bucket 12 and flows into the bucket 3 through the flow spaces 8 and 14. As a result, bucket 3 becomes heavier and begins to sink. If it begins to sink even slightly, the upper edges of the water pipes 5 and 12 will drop below the water level, and the inflow will become even more intense, causing the bucket 3 to suddenly become heavier and sink all at once. As a result, the inside of the bucket 3 becomes full, and drain also accumulates on the top of the lid plate 4 of the bucket 3. At this time, cylinder 9
Since it is integrated with the bucket 3, it sinks at the same time and pulls the switching rod 7 downward via the collar 10 when it falls below 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 disc 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 disc valve 26 is pulled downward and the attraction force is applied to the coil spring 27.
The disk valve 26 is finally pressed against the valve seat 25 and closes the exhaust hole 24. The pressurized gas, which has nowhere else to go, passes around the switching rod 7 of the vent hole 23 and flows into the liquid reservoir chamber 1 to pressurize the drain in the liquid reservoir chamber 1. Therefore, the drain in the bucket 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. (FIG. 1 shows this state.) When the drain in the bucket 3 flows out, the bucket 3 becomes lighter and floats up. At that time, the drain on the lid plate 4 of the bucket 3 passes through the outer periphery of the bucket 3 and is replaced under the bucket 3. Also, after a predetermined play distance during this levitation, the inner lower surface of the cylinder 9 comes into contact with the flange 10 and pushes up the switching rod 7, so the link member 3
1 in the opposite direction as shown in FIG.
is lowered to stop the flow of pressurized gas into the valve chamber 20. At the same time, the step 28 of the switching rod 7 engages with the disc valve 26 to separate the disc valve 26 from the valve seat 25. The pressurized gas escapes into the atmosphere from the exhaust hole 24, and the pressurized gas inside the liquid reservoir chamber 1 also flows back through the ventilation hole 23 and escapes to the exhaust hole 24. Therefore, the outflow of condensate from the liquid outflow pipe 13 is stopped, and the pressure inside the liquid storage chamber 1 also decreases, so the liquid supply pipe 13 is stopped.
6, the drain flows into the liquid storage chamber 1 again to further float the bucket 3, and this process is repeated many times thereafter.

In addition, by installing the auxiliary liquid storage container next to the check valve of the liquid supply pipe, changing the capacity of the auxiliary liquid storage container allows you to adjust the pumping amount of drain as easily 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 condensate in the auxiliary liquid storage container to easily flow into the liquid storage chamber.

As described in the embodiments above, in the liquid pumping machine of the present invention, the disc valve that opens and closes the exhaust hole in the supply/exhaust switching device is raised and lowered by a predetermined elastic supporting force of the coil spring to the extent that it is slightly separated from the exhaust hole. Since the coil spring is movably supported, the stepped portion of the switching lever assists the force of pushing up the disc valve, and even if the buoyancy of the bucket is weak, the disc valve can be reliably moved away from the exhaust hole when the bucket is raised. We can expect good operation.

[Brief explanation of the drawing]

The drawings show an embodiment of a liquid pumping machine according to the present invention, and FIG. 1 is a partially sectional front view thereof, and FIG.
1, FIG. 3 is a vertical sectional view of the supply/exhaust switching device, 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...Bucket,
4... Lid plate, 6... Supply/exhaust switching device, 7... Switching operation rod, 13... Liquid outflow pipe, 15... Check valve,
16...Liquid supply pipe, 17...Check valve, 20...
Valve chamber, 21... Pressure chamber, 22... Partition wall, 23...
Vent hole, 24...Exhaust hole, 25...Valve seat, 26...
... Disc valve, 27 ... Coil spring, 28 ... Step portion, 31 ... Link member, 36 ... Pilot valve, 38 ... Knob shaft, 39 ... Spherical valve.

Claims (1)

[Claims] 1. A liquid storage chamber sealed by a lid, a bucket disposed in the liquid storage chamber so as to be able to float up and down, a liquid supply pipe connected to one side wall of the liquid storage chamber via a check valve, and the In a liquid pumping machine comprising a liquid outflow pipe suspended from the lid into the bucket, and a supply/exhaust switching device installed at the top of the lid, the supply/exhaust switching device passes through the lid and directs the liquid. It has a valve chamber in which a ventilation hole communicating with the reservoir chamber and an exhaust hole opened to the atmosphere are arranged side by side on the lower surface of the inner wall, and a pressure air chamber formed above the valve chamber with a partition wall in between. is provided with a pilot valve that allows gas supplied from an appropriate pressure source to flow into a valve chamber, and a disc valve that opens and closes the exhaust hole is connected to the exhaust hole by a predetermined elastic supporting force of a coil spring. A switching rod, whose lower end is connected to a bucket, is inserted into the ventilation hole, and its upper end and the knob shaft of the pilot valve are inserted into the valve chamber in a seesaw shape. A liquid pumping machine, characterized in that the switching rod is connected to the valve via a link member pivotally supported thereon, and further comprises a step portion formed on the outer periphery of the switching rod, which can engage with the disc valve when the bucket is raised.