JPH08219016A - Simple structure pump with float type automatic stop valve - Google Patents

Abstract

PURPOSE: To prevent overflow when oil is supplied to a cartridge type petroleum tank by installing a float at the tip of a discharge pipe inserted from an oil injection port of the tank, allowing the float to be floated when full supply of oil is made and to heave a slide member, and thereby blocking the flow path of the discharge pipe. CONSTITUTION: The foremost 5 of the discharge pipe 3 of a pump 1 is bent, and in such a way as crossing it, a slide member 6 is held by a slide guide 7. A float 8 is coupled with the lower part of this slide member 6, and a display part 10 with a mark is tied with the upper part of the member 6. Further in its middle part an opening is provided and the slide member 6 furnished with a stopper 12 thereover is prevented from dropping. In the condition the float 8 is sunk before it contacts with the liquid, the opening and discharge pipe 3 are on a level to generate communication, and oil supply from the pump 1 is continued. When the liquid level rises to touch the float 8, it floats to heave the slide member 6, and the opening is set off from the position of the discharge pipe 3, which is put in the enclosed condition, and thus oil supply is hindered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple type having a liquid amount display and an automatic stop function of discharge, which is effective for preventing overflow at the time of refueling a cartridge type oil tank. The purpose is to provide a pump.

[0002]

2. Description of the Related Art Petroleum stoves using a cartridge type petroleum tank are commercially available from manufacturers, and refueling by a manual or electric refueling pump is carried out at each home. Refueling work is generally done by placing the tank on the floor in a dark place such as a storage room, but the liquid level indicator that displays the liquid level is almost always located on the side of the tank. It is inconvenient because you have to bend down and take an unreasonable low posture to check. Furthermore, since the liquid used by the liquid level indicator is transparent kerosene, the contrast is weak and it is very difficult to see in dark places. For this reason, the tank is often overfilled during refueling, causing the tank to overflow and polluting the floor surface, which may cause a fire. It is desired to develop a simple pump that can clearly check the liquid amount from the top of the tank and automatically stop refueling when the tank is full.

In recent years, a refueling pump has been put on the market in which an electric pump and an electric level gauge are combined to automatically stop the pump when the tank is almost full. However, when the battery runs out, you cannot use it without a spare battery,
There are problems such as being expensive, and there is a need for a simple liquid amount detection and automatic stop method that can be used with a manual pump.

In Japanese Utility Model Laid-Open No. 62-126583, the inlet of the tank is sealed with a rubber stopper, the discharge pipe of the oil supply pump and the stop valve connected to the float are inserted, and the float rises to raise the valve. With the increase in tank pressure when the
You are about to stop refueling. In this method, the stop position changes depending on the discharge pressure of the pump, it is difficult to cope with inlets of different diameters, especially for small diameter inlets, and there is a problem that scraps of rubber plugs are easily mixed. is there.

In Japanese Utility Model Laid-Open No. 2-39582, it is proposed that air is sent to the pump chamber of a manual pump by using a valve that opens and closes when the float moves up and down to stop the oil supply from the pump. Although the function is excellent, there are problems that the mechanism is too complicated and there is a risk of failure, and that it becomes expensive.

There are also commercially available products that employ a stop mechanism that uses a magnet. A valve using a magnet is provided at the outlet of the pump. When the discharge pressure of the pump is high, the valve is opened by overcoming the attraction force of the magnet, and when it is low, the valve is closed. Instead of detecting the liquid level on the tank side that receives refueling, it tries to utilize the liquid level height of the tank that sends refueling, so-called head pressure. The stop position changes greatly depending on the amount,
Problems such as stopping before full and overflow are likely to occur.

[0007]

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned situation and provides an automatic operation during refueling of a cartridge type oil tank.
It is an object of the present invention to provide a simple pump with a float type automatic stop valve, which is useful for the prevention of flow, simple, easy to see, inexpensive, and applicable to various commercially available tanks of various sizes.

[0008]

The present invention takes the following means in order to achieve the above object. That is, the tip of the discharge pipe of the pump is bent, and a flat plate with a float attached to the bottom and a display member on the top and an opening in the middle is placed in a direction transverse to the axial direction of the tip of the bent discharge pipe. Holding it so that it moves up and down, providing an opening so that it communicates with the discharge pipe when the float is down, and when the float is up, it is out of position and out of communication, or
Provided below the discharge pipe outlet of the pump is a tubular body that moves up and down along the discharge pipe by a float and has a display member on the upper part. Mounting, and further, the magnet or iron member at the upper part of the float is conical, and the magnet or iron member at the outlet of the discharge pipe is a conical taper recess that fits with the means. It is what

The above invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic view of a simple pump according to claim 1 of the present invention, and FIGS. 2 and 3 are enlarged vertical cross-sectional views of a distal end portion of a discharge pipe. The pump 1 includes a pump unit 2, a suction pipe 3, and a discharge pipe 4.
The tip portion 5 of the discharge pipe 4 is bent, and the slide member 6 is held by the slide guide 7 so as to cross the tip portion 5. The slide member 6 is, as shown in FIG.
The float 8 is connected to the lower portion, and the display member 10 marked with a mark 9 is connected to the upper portion. Further, an opening 11 is opened in the middle part, and a stopper-12 is provided on the opening 11.
Is provided to prevent the slide member 6 from falling.

The slide member 6 moves up and down by the buoyancy of the float. Float 8 before it contacts the liquid
Is lowered, the positions of the opening 11 and the discharge pipe 4 coincide with each other and communicate with each other, and the oil supply from the pump is continued. When the liquid surface rises and comes into contact with the float 8, the float 8
Floats up and pushes up the slide member 6, the opening 11 comes off the position of the discharge pipe 4, and the discharge pipe 4 is covered.
Refueling is interrupted and almost stopped.

Generally, a stop mechanism using a float causes the float to be enlarged to generate a large buoyancy, so that a direct float is used.
Cover the discharge port, or use the lever principle to cover the valve with increased buoyancy, or detect the movement of the float electrically or optically to electrically open the valve. It's closed. For the purpose of the present invention, electrical means cannot be used, and it is not desirable to use a complicated mechanism such as a large float or a lever. It was possible to achieve the present invention, focusing on the fact that the force may be small as long as it crosses the flow rather than opposes it. That is, since the slide member 6 moves in a direction transverse to the axial direction of the discharge pipe, it can slide with only the buoyancy of the small float 8 while receiving almost no dynamic pressure of the oil supply flow. In order to make maximum use of the buoyancy, it is better to set the sliding direction to the gravity direction, and the insertion direction of the discharge pipe 4 into the tank is generally from the upper side to the lower side. It is desirable to be substantially parallel to the sliding direction, and it is necessary to bend the tip portion 5 of the discharge pipe 4 in order to intersect them.

The width of the slide member 6 is made larger than the inner diameter of the discharge pipe 4 so as to prevent leakage from both sides when the lid is covered, but leakage from the gap between the slide member 6 and the slide guide 7 is prevented. It is unavoidable and cannot be a complete stop. At the same time as the discharge pipe 4 is covered,
Check that the pump is full by raising and stop pump 1. Even if there is some leakage in the stop by the slide member 6, there is no problem in practical use. After the pump is stopped, kerosene remaining in the discharge pipe 4 does not have to leak into the tank and a special discharge operation need not be performed, which is rather an advantage of workability.

The float 8 may be made of wood, but is preferably a hollow body or foam made of resin. It may be bonded to the slide member 6 or integrally molded. The inlet of the cartridge type tank of the commercial oil stove is narrow, and the diameter is 35 mm or less in most cases. Therefore, the size of the float is 30
It is desirable that the thickness is less than or equal to mm.

A display member 10 is provided on the slide member 6 for visually confirming the rise of the liquid level. Marks 9 may be marked on the slide member 6 with ink or paint, or the slide member 6 may be originally colored and molded integrally with the slide member 6. When the slide member 6 rises, a mark that is easy to see is required at a position that can be confirmed from above the tank.

As shown schematically in FIG. 5, the slide guide 7
Is a tubular member having a rectangular cross section with the top and bottom opened, and the slide member 6
Moves up and down in it. An opening 13 is formed on two surfaces that cross the discharge pipe 4, and forms a discharge flow path together with the opening 11 of the slide member 6. The stopper 12 of the protrusion provided on the slide member 6 is for catching on the upper end of the slide guide 7 and preventing the drop.

Next, claim 2 will be described. FIG. 6 is a perspective view showing the outer appearance of the discharge part of the present invention, and FIG. 7 is a vertical sectional view thereof. Below the outlet of the discharge part of the pump, a tubular body 14 which moves up and down by the float 8 is mounted so as to slide along the tip 5 of the discharge pipe. A magnet or iron member is attached to the magnet so that a magnetic attractive force acts on the magnet. The display member 10 is provided on the uppermost portion of the tubular body 14, and the opening portion 15 is provided on the middle side surface as an outflow passage for the discharged liquid.

At the beginning of refueling, the magnet 16 or the iron member 16 is located sufficiently below the discharge pipe outlet, so that the magnetic attractive force is small, and the outlet of the discharge pipe 4 is released to continue refueling. Eventually, when the liquid level rises to immerse the float and receives buoyancy, the tubular body 14 gradually rises,
Eventually, the magnetic attractive force becomes dominant, and the tubular body is rapidly pulled up by the magnetic attractive force, not by the buoyancy, the discharge pipe outlet is covered, and the fuel supply is stopped. The refueling worker confirms the full amount by the display member 10, stops the pump, and
By pressing 0 by hand, the tubular body 14 is released downward, the discharge pipe outlet is opened, and the kerosene remaining in the discharge pipe is discharged.

The float 8 may be made of wood, but is preferably a resin hollow body or foam. It is even better if it is integrally molded with the tubular body 14. A plurality of outlets 15 are provided on the side surface or the lower surface of the cylindrical body 14 so that the liquid discharged from the pump can be smoothly discharged into the tank. The diameter of the tubular body 14 is preferably 30 mm or less.

The inner surface of the upper portion of the cylindrical body 14 is in contact with the outer surface of the outlet portion of the discharge pipe 4, and the vertical movement of the cylindrical body 14 is performed along the discharge pipe 4. A stopper 12 and a display member 10 are provided on the top of the cylindrical body 14 to prevent it from falling. Although the display member 10 is a mark for confirming the rise of the tubular body 14, it is also a place to apply a force to separate the closely attached magnets, and thus sufficient strength is required. To make it easy to see, it is better to mark the mark with paint or to color the mark.

The magnet to be used is not particularly limited, but is selected from the magnitude of magnetic force and durability. Ferrite sintered magnets such as barium ferrite magnets and strontium ferrite magnets are desirable. The magnet may be provided on at least one of the discharge pipe outlet and the upper portion of the float 8. As a magnetic attraction, magnets like,
Use a magnet and a ferromagnetic material such as iron. When small size and light weight are required, combine magnets with anisotropic magnetization. The strength of the magnetic attraction must be stronger than the ejection pressure at the time of contact, but is designed to be so strong that it can be smoothly separated by pushing the display member 10 with a finger.

Claim 3 will be described with reference to FIG. During refueling, the upper surface inside the tubular body 14 receives the dynamic pressure of the discharged liquid. In order to smoothly float the float 8, the top surface is shaped like a cone,
In particular, it is desirable to make it conical so as to reduce the influence of dynamic pressure. Magnet 16 or iron member 1 on the top of the float 8
When 6 is formed into a conical shape, and the magnet 17 or the iron member 17 at the outlet of the discharge pipe is formed into a taper concave portion that fits with the conical shape, the float can be assisted and the float can be downsized. . If the outlet of the discharge pipe is expanded, the flow of the discharge liquid is diffused, and the dynamic pressure is reduced, resulting in even better results. further,
In the case of contact between flat surfaces, when foreign matter enters and a gap is created, the discharge liquid may splatter right next to the outside of the tank, but when contacting the taper surface as in this claim, it may be slanted downward. You will be able to fly to and prevent troubles during refueling.

Care must be taken when attaching the pump to the tank. Make sure the float is in the correct full position.
The discharge pipe of the pump must be fixed. It is necessary to devise using rubber magnets, suction cups, spring materials, etc. Particularly, in the second and third aspects, since the tubular body moves outside the discharge pipe, there is a concern that it may come into contact with the tank and hinder the movement, and therefore the mounting method needs to be carefully considered.

[0023]

According to the pump of claim 1 of the present invention, when refueling,
The float 8 mounted on the tip portion 5 of the discharge pipe inserted from the tank inlet floats up when full, and slides 6
Is pushed up, the flow path of the discharge pipe 4 is blocked, and the discharge is stopped. The operator confirms the display member 10 that rises with the float 8 and stops the pump 1. According to the pump of claim 2 or 3, when full, the magnet 16 or the iron member 16 attached to the upper surface of the float 8 approaches the outlet of the discharge part due to the floating of the float, and the magnetic attractive force is exerted. Got to work,
Magnetic discharge attracts the outlet of the discharge part, closes the lid, and stops discharge. The operator confirms the display member 10 to stop the pump 1 and pushes down the display member 10 to discharge the residual oil in the discharge pipe 4. The pump is small and lightweight and can be used with many types of commercial oil stoves.

[0024]

EXAMPLES Examples of the present invention will be further described below.

First Example A manual pump shown in FIGS. 1 and 2 was manufactured. The discharge pipe tip portion 5 is made of polyvinyl chloride and is bonded to the discharge pipe 4 of a commercially available polyethylene pump with an adhesive. Outer diameter of discharge pipe tip 5 is 24
mm, inner diameter 18 mm, and manufactured by processing a pipe for commercial water supply piping. The kerosene sent from the upper pump passes through the upper circular cross-section flow path, the semi-circular cross-section flow path, the elbow-shaped curved pipe section, and intersects the slide member 6 at about 45 °. It flows downward through the elbow-shaped curved pipe part.
An enlarged view of the slide member 6 is shown in FIG. 4, which is a polyvinyl chloride flat plate having a width of 18 mm and a thickness of 1 mm, and the opening 1 having a diameter of 13 mm.
1 is open. A float 8 which is a polyethylene hollow sphere having an outer diameter of 25 mm is adhered to the lower part, and a stopper 12 for hooking and a display member 10 of a mark 9 marked with red paint are integrally formed on the upper part. Has become. Figure 5
FIG. 6 is a perspective view of a box-shaped slide guide 7. The opening 13 having a diameter of 13 mm formed on both side surfaces is adhered to the discharge pipe 4 so as to match the discharge pipe cross-section. When the float 8 does not come into contact with kerosene and the slide member 6 is lowered, the position of the opening 11 overlaps the opening 13 of the slide guide 7 to form a smooth discharge flow path, and the float 8 When the water was immersed in kerosene and the slide member 6 moved upward, the openings were shifted from each other to close the flow path. This discharge pipe tip portion 5 is fixed to the tank inlet by a holder that is a combination of a suction cup and a spring material, and the height is set so that the upper surface of the float 8 is located 40 mm below the inner ceiling surface of the tank. did. The position of the mark 9 is 20 mm above the inlet.
When refueling from the pump was started and the mark was monitored from above the tank, it was confirmed that the mark had risen, so the pump was stopped. After removing the pump and measuring the position of the liquid level,
It was 43 mm below the ceiling surface in the tank.

Second Example A discharge pipe tip portion 5 shown in FIG. 3 was manufactured. It is the same as the first example except that the secondary discharge pipe outlet member 18 of the slide guide 7 of the first example is removed. Refueling work to the tank was successful.

Third Example FIG. 6 is a perspective view of an essential part of an embodiment according to claim 2. At the tip 5 of the discharge pipe of the pump, a cylindrical body 14 having an opening 15 on the side surface and a display member 10 provided on the top is provided as a stopper-1.
It is mounted so as to be suspended from the tip portion 5 of the discharge pipe by 2. FIG. 7 is a vertical sectional view of FIG. A cylindrical body 14 having a button-shaped iron member 16 adhered to the inside thereof and a foamed polyethylene float 8 adhered to the lower portion thereof is provided with an opening portion 15 on a side surface thereof so that liquid discharged from the pump flows out smoothly. I am trying to do it. A ring-shaped barium ferrite magnet 17 is attached to the outlet of the discharge pipe, and the distance between the iron member 16 and the magnet 17 when the float 8 is lowered is 25 mm. Although the outer diameter of the discharge pipe 4 is 15 mm, only the outer side of the magnet 14 is 19 mm, and the stopper 12 is caught here. The outer diameters of the tubular body 14 and the float 8 are both 25 mm, and the length of the float is 25 mm. The height of the magnet 17 is adjusted so that the lower surface of the magnet 17 is 35 mm below the ceiling surface in the tank, and the discharge pipe 4 is attached to the inlet of the tank.
Attached. The display member 10 started to move slowly a while after refueling was started, and when it rose about 10 mm, suddenly moved about 15 mm and stopped. Stop the pump,
The display member 10 was pushed downward to discharge the residual kerosene in the discharge pipe, and the tubular body 14 was extracted from the tank. When the liquid level in the tank was measured, it was about 45 mm from the ceiling surface.

Fourth Embodiment An embodiment of claim 3 is shown in FIG. The barium ferrite magnet 17 and the iron member 16 are processed so that they fit each other in a conical surface, and the taper angle is 45 °. The opening 15 opened in the tubular body 14 is also processed at an angle of 45 °. Other conditions were the same as in Example 3, and a refueling test was carried out. As a result, the rising of the marking member was smooth, and the stop of the discharge was correctly performed at the set position.

[0029]

As described above, the simple pump with a float type automatic stop valve of the present invention is small and lightweight, can be used at any time because it does not use electricity, is inexpensive, and has various sizes. It is compatible with commercially available oil stoves, and the mark and automatic stop function that are easy to see even in dark places make it especially suitable for
This has the effect of preventing overflow during refueling of the tridge type oil tank.

[0030]

[Brief description of drawings]

FIG. 1 is a schematic diagram of a simple pump according to claim 1 of the present invention.

FIG. 2 is a vertical cross-sectional view showing an example of a discharge pipe tip portion of the present invention.

FIG. 3 is a vertical cross-sectional view showing another example of the distal end portion of the discharge pipe of the present invention.

FIG. 4 is an elevational view showing an example of a slide member of the present invention.

FIG. 5 is a perspective view showing an example of slide guide of the present invention.

FIG. 6 is a perspective view of a tubular body according to claim 2 of the present invention.

FIG. 7 is a vertical cross-sectional view showing an example of a tubular body of the present invention.

FIG. 8 is a vertical cross-sectional view of the tubular body according to claim 3 of the present invention.

[Explanation of symbols]

 1 Pump 2 Pump Part 3 Suction Pipe 4 Discharge Pipe 5 Discharge Pipe Tip 6 Slide Member 7 Slide Guide 8 Float 9 Mark 10 Display Member 11 Opening 12 Stopper 13 Opening 14 Cylindrical 15 Opening 16 magnet or iron member 17 magnet or iron member 18 discharge pipe outlet member

Claims (3)

[Claims] 1. A discharge pipe tip (5) of a pump (1) is bent, a float (8) is attached to a lower portion, a display member (10) is provided on an upper portion, and an opening (11) is provided in an intermediate portion. The flat plate provided with is held so as to move up and down in a direction transverse to the axial direction of the bent discharge pipe tip (5), and the opening discharges when the float (8) is lowered. A simple pump with a float type automatic stop valve, which communicates with a pipe and is provided so as not to communicate with the pipe when it is raised. 2. A display member (10) is provided below the discharge pipe outlet of the pump and moved up and down by a float (8) along the discharge pipe (4) and at the upper part for confirming the float position. A simple pump with a float type automatic stop valve, characterized in that a tubular body (14) is provided and a magnet is attached to at least one of the discharge pipe outlet and the upper part of the float. 3. A magnet (1) above the float (8)
6) or the iron member (16) is a conical shape, and the magnet (17) or the iron member (17) at the outlet of the discharge pipe is a conical taper recess that fits with the magnet (17), both of which are magnetic. The simple pump with a float type automatic stop valve according to claim 2, wherein the simple pump is closely attached by an attractive force.