JPS6246000A - Simple pump - Google Patents

Abstract

PURPOSE:To certainly stop siphon action by specifying the ratio of the inside diameter of the air pipe of a siphon pump to that of its delivery hose. CONSTITUTION:A pump 1 comprises a muff 3, a suction pipe 6 and a delivery hose 8 which are inserted into a vessel mouth 5 and a liquid subdividing vessel 7 respectively. The ratio of the inside diameter of an air pipe 15 for stopping siphon action to that of the delivery hose 8 is specified more than 10:2. a liquid level in the liquid subdividing vessel 7 rises to cause the liquid to be drawn in the air pipe 15, but the relatively larger inside diameter of the air pipe 15 prevents the liquid from rising to its upper position. Thereby flow out due to siphon action can be stopped.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is used for dispensing kerosene from a large container into the tank of an kerosene heater or for subdividing other liquids. This relates to a possible simple pump.

[Conventional technology]

Conventional simple pumps of this type are equipped with a cylindrical part connected to the suction hose and the discharge hose through check valves at the lower end of the pump operating part, and by compressing and restoring the pump operating part, the air inside the suction pipe is removed. Air and liquid are sucked in and sent under pressure to the discharge hose, and once the liquid begins to be pumped out, the liquid continues to flow through the siphon action, and the suction pipe and discharge hose are connected together within the cylindrical section at the lower end of the pump operation. The lower end of the cylindrical part is equipped with a cap that airtightly closes the opening of the large container, and the pump operation section compresses and restores the outside air into the large container, pressurizes the inside of the large container and causes the liquid to rise up the suction pipe. There is also a type (called a pressure pump) that flows out from a discharge hose. In the case of this pressure pump as well, when the liquid starts to be pumped out, the siphon can be discharged by communicating the inside of the large container with the outside air.

In the case of the above-mentioned type of simple pump, there is no need to operate the pump operating part while the siphon is flowing out, which is convenient, but if monitoring is neglected, the liquid may overflow from the container.

Therefore, in the case of the above-mentioned simple pump, the large container remains sealed, and the inside of the large container and the small liquid container are communicated with each other by an air pipe. There has been an attempt to make it impossible for the air pipe to replace the air when the liquid level reaches this level, and to stop the siphon outflow (
Utility Model Publication No. 51-1.2003, Japanese Patent Application Publication No. 57-19838
No. 2).

[Problem that the invention seeks to solve]

'' - The mouth of the large container is sealed, the inside of the large container and the small liquid are communicated with each other with an air tube, and the liquid small portion of the air tube is inserted into the container. Even if the tube end is set at the specified liquid level, siphon outflow may still continue even though the tube end of the air tube is actually closed at the specified liquid level.

The reason for this is that the inner diameter of the air pipe is significantly smaller than the inner diameter of the discharge hose, and the slippage (weight) of the liquid flowing down inside the discharge hose is large. This is caused by reflux in the container.

[Means for solving problems]

In a simple pump, the container opening of the large container is sealed, and the inside of the large container and the small liquid are communicated with the inside of the container through an air pipe to flow out through the siphon, and the small liquid in the air pipe is defined by the end of the tube inserted into the container. In order to solve problem 1 of the simple pump that is set at the liquid level, one of the present invention is a simple pump in which the ratio of the inner diameter of the air pipe to the discharge hose is 10=2 or more, Another feature of this invention is that the distal end of the discharge hose has a cylindrical lower end portion that can be inserted into the opening of the container and has a small gap between it and the dispensing hose, and the middle portion is swollen. A simple pump in which a short cylindrical body is fitted onto the outside and airtightly attached at the upper end of the cylindrical part, the tip of the air pipe is airtightly inserted into the short cylindrical body, and the ratio of the inner diameter of the air pipe to the discharge hose is 10=2 or more. That is.

[Effect]

By setting the lower end of the air pipe or the lower end of the short cylinder at the tip of the discharge hose to the specified liquid level in the container,
When the pump operating part is compressed and restored and the siphon is flowing out, the small amount of liquid is sucked into the air pipe when the liquid level in the container reaches the specified liquid level, or into the short cylinder and then into the air pipe.
When the internal volume of the air tube is added and the liquid reaches near the second part of the rising part of the air tube, the amount of liquid in the air tube and short cylinder becomes large and the air displacement function is lost, causing the siphon to close. The outflow will stop.

〔Example〕

FIG. 1 shows an example of a simple pump with a small volume of liquid.
The cylinder part 3 is equipped with a large container 4. FIGS. 3 communicates with the inside of the large container via a check valve 10a, and the lower end of the cylindrical portion 3 is provided with a stopper 11 that airtightly closes the opening 5 of the large container, and this pump is of a pressurizing type. Reference numeral 12 denotes an outside air inflow valve 1 which keeps the inside of the large container 4 at normal pressure for continuous outflow of liquid by siphon action.
3 is an axial hole of the valve, 14 is a side hole communicating with the axial hole,
When the valve 12 is completely pushed in as shown by the chain line in the figure, the side hole 14 will open.
A part of the suction pipe 6 also communicates with the inside of the suction pipe 6 to stop the siphon action.

Although not shown in the drawing, a suction pipe is connected to the lower cylindrical part of the pump operating part via a reverse valve, and a reverse 11 valve is connected to the lower cylinder part of the pump operating part.
- Even in a normal simple pump in which a discharge hose is connected through a valve, the outflow of the siphon can be stopped by providing a valve similar to the valve 12 shown in the drawing in the same cylindrical portion.

15 is an air pipe connected to the cylindrical portion 3 for airtightly closing the container opening 5 of the large container 4 with a stopper 11, displacing the small portion of the liquid with air in the container 7, and causing the liquid to flow out by siphon action. By aligning the tip of the air pipe with the specified liquid level in the container 7, the siphon action is automatically stopped. 10b is a reverse 11-valve that only allows outside air to flow into the cylindrical portion 3 from the air pipe 15 during pump operation.

An air pipe similar to the air pipe 15 described above can also be incorporated into the ordinary simple pump.

16 is a short cylindrical body with a swollen central part attached to the tip of the discharge hose 8;
Insert the air pipe 15 into the container opening 17, align the tip a with the specified liquid level in the container, and attach the end to the discharge hose airtightly, and insert the tip of the air pipe 15 into the short cylinder 16. Insert airtightly into the

However, it is also possible to pass the midway part of the air pipe into the discharge hose and lead out the tip into the short cylinder.Also, a collar plate can be attached to the tip of the discharge hose to replace the short cylinder so that it can be adjusted up and down. The tip of the container can also be supported under the flange plate so that the liquid portion matches the specified liquid level in the container.

The ratio of the inner diameter of the air pipe 15 to the discharge hose 8 is 10:2 or more.

The liquid is pumped out by the pump, and the air in the container is replaced with the large container by the air pipe 15, and the liquid is flowing out due to the siphon action. Or, when the liquid reaches the tip of the short cylindrical body 16, it is sucked into the air pipe 15, but since the air pipe is relatively thick, it does not rise above the upper part of the air pipe, and the siphon outflow stops.

〔effect〕

For small liquid portions, the ratio of the inner diameter of the air pipe to the discharge hose for displacing the air in the container with the liquid in the large container is relatively thick, with a ratio of 10:2 or more. After the liquid level reaches the specified liquid level, the air pipe will suck in the liquid, but even if the liquid rises inside the air pipe, it will try to flow out of the discharge hose before it reaches one end, resulting in a siphon effect. is blocked and the siphon outflow is automatically stopped.O Also, for this purpose, a short cylindrical body with a bulged midway part is attached to the tip of the discharge hose, and the tip of the air pipe is connected to this short cylindrical body. As a result, the amount of liquid sucked into the air tube becomes even larger due to the addition of the liquid inside the short cylinder, and the siphon stops when it is only sucked halfway up the air tube.

[Brief explanation of the drawing]

・FIG. 1 is a partially cutaway side view of an example of a simple pump according to the present invention in a usage mode, and FIG. 2 and FIG. 3 are an enlarged perspective view and a vertical cross-sectional view of the same essential parts. 2... Pump operating part, 3... Cylindrical part, 6... Suction pipe, 8... Discharge hose, 10a, 10b... Reverse t-hi valve, 11... Stopper, 15... Air pipe, 16...Short cylinder, 3...Lower end of short cylinder 16, 5...Container opening of large container 4, 7...Container for liquid small portion, b...Specified liquid level Rank. Patent applicant Tadashi Saito Homa Agent Kama 1) Text 2 Procedural amendment (A, 21 Title of invention Simple pump 3, Relationship to the person making the amendment Case Patent applicant address 3-15-1 Hakushima, Minoh City No. Name: Tadashi Saito 5゜ Showa Year, Month, Day (Date of dispatch) 6, Number of inventions increased by the amendment 7, Subject of amendment Contents of the amendment Figure 1 of the drawing will be corrected as shown in the attached sheet.

Claims (2)

[Claims] (1) A cylindrical part is provided at the lower end of the compressible and decompressible pump operating part, the lower end of which is equipped with a sealing stopper to the opening of the large container, and the cylindrical part has a suction pipe to be inserted into the opening of the large container and a liquid A discharge hose to the subdivided container is provided, and the upper end of an air pipe attached to the discharge hose is introduced into the cylindrical portion separately from the discharge hose, and this air pipe communicates only with the container opening of the large container,
1. A simple pump in which the tip of the air pipe is aligned with a specified liquid level in a liquid dispensing container, characterized in that the ratio of the inner diameter of the air pipe to the discharge hose is 10:2 or more. (2) A cylindrical part with a sealing stopper to the opening of the large container is provided at the lower end of the compressible and decompressible pump operating part, and the cylindrical part is equipped with a suction pipe to be inserted into the opening of the large container and a liquid A discharge hose to the subdivided container is provided, and the upper end of an air pipe attached to the discharge hose is introduced into the cylindrical portion separately from the discharge hose, and this air pipe communicates only with the container opening of the large container,
In a simple pump in which the tip of the air pipe is aligned with the specified liquid level at the mouth of the liquid dispensing container, the tip of the discharge hose has a lower cylindrical part that can be inserted into the mouth of the liquid dispensing container, and is connected to the discharge hose. A short cylindrical body with a bulging midway part is provided with a small gap between the two, and the upper end of the cylindrical body is fitted airtightly, and the tip of the air pipe is airtightly inserted into the short cylindrical body.
A simple pump characterized in that the ratio of the inner diameter to the discharge hose is 10:2 or more.