JPH024115A - Liquid transfer device - Google Patents

Abstract

PURPOSE:To reduce pressure losses for completing liquid transfer operation in a short period of time by forming the inside surface of a bending part of a discharge port, that is opened on the straight side of a discharge pipe, into elbow or bend shape, and by installing a liquid detecting element below the discharge port. CONSTITUTION:A spout 23 with a valve body 43 is provided on No.2 liquid container 22 and a detachable adapter 20 is mounted on it. The adapter 20 is connected to the liquid contained in No.1 liquid container 16 by a path and provided with a liquid detecting element 32. In addition, the adapter 20 is provided with a discharge pipe 30 that is provided with a discharge port 38 on its side of the straight portion. The inner surface of a bending part of the discharge port 38 is formed into a shape of elbow or bend, and the discharge pipe is reduced in diameter at its lower end. The liquid detecting element 32 is installed below the discharge port 38. As the inside diameter of the discharge pipe, that is a path for liquid transfer, is not reduced by the liquid detecting element 32, and the inner surface of the bending part has a shape of elbow or bend, a required flow area can be kept without having a large diameter of the discharge pipe 30.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid transport device for transporting liquid from a first liquid storage container to a second liquid storage container.

BACKGROUND OF THE INVENTION In FIG. 5, reference numeral 1 denotes a cartridge tank conventionally used in oil heaters, to which a cap 2 is attached. An opening 3 is formed in the center of the base 2.

A valve body 4 for opening and closing the opening 3 is provided within the cap 2 and is biased in the "close" direction by a compression spring 5. When refueling this cartridge tank 1, it was common to install it on the floor 7 with the cap 2 facing upward, remove the cap 2 from the refueling port 6, and refuel with a pump (not shown) or the like.

However, in the above-described configuration, when refueling the cartridge tank 1, kerosene adheres to the material when the cap 2 is removed from the refueling port 6, causing discomfort. Another problem was that opening and closing the cap 2 was troublesome.

Therefore, a device as shown in FIG. 6 has been proposed as a device that can replenish liquid such as kerosene into the cartridge tank 1 without removing the cap 2 and without getting one's hands dirty. In FIG. 6, when refueling the cartridge tank 1, with the mouthpiece 2 of the cartridge tank 1 facing upward, the valve body 4 is pushed down against the compression spring 5 at the tip of the discharge side pipe 8, and the discharge side pipe 8 is moved between the mouthpieces 2 and 4. The holder 9 is inserted into the cap 2 through the opening 3 of the cap, the holder 9 is placed around the cap 2, and the annular convex portion 1o of the cap 2 is engaged with the engagement recess 11 of the holder 9. Hold it in cap 2. By operating the fuel pump 12 in this state, kerosene is sucked up from the kerosene tank (not shown) through the pipe 13 as shown by the broken line arrow A in FIG. 1, and the air in this tank 1 is discharged to the outside through the opening 3 of the cap 2 and the gas vent hole 15 of the holder 9, as shown by the dot-dash line arrow. (For example, Japanese Utility Model Application Publication No. 82-70238) Problems to be Solved by the Invention However, in the above configuration, the kerosene flow path (broken arrow) and the air flow path (-dotted chain arrow) in the cap 2 are Since the structure is not partitioned and the liquid kerosene and the gaseous air collide with each other, as a result, it may not be possible to refuel the cartridge tank 1 quickly, or if you try to refuel quickly, there may still be a small amount of kerosene in the tank 1. Even when the kerosene is not filled, the kerosene discharged from the notch 14 of the discharge pipe 8 hits the inside of the mouthpiece 2, and the force of the collision causes kerosene to be blown out from the opening 3 and gas vent hole 15 together with air, resulting in In addition to getting the area around the cartridge tank and hands dirty, I also had to refuel while silently checking with the refueling center to see if the kerosene in the cartridge tank 1 had reached full capacity, and manually stop the operation of the refueling pump 12. This poses the problem that it is necessary and cumbersome.

The present invention solves such conventional problems, and the present invention is capable of refueling without removing the cap from the cartridge tank, and when a predetermined tank liquid level is reached, the refueling pump automatically stops, thereby eliminating the trouble of liquid transportation. The purpose is to provide equipment.

Means for Solving the Problems In order to solve the above problems, the liquid transport device of the present invention includes a pump unit for transporting the liquid in a first liquid storage container, and a valve body provided in the second liquid storage container. A base having a
An adapter that can be detachably attached to the cap, communicates with the liquid in the first liquid storage container through a conduit, and has a liquid detection element; The discharge pipe has an elbow or bend-shaped inner surface where it bends with the discharge port, the outer diameter of the tip of the discharge pipe is made thin, and the liquid detection element is provided below the discharge port. It is something.

According to the above-described structure, the adapter is first attached to and connected to the cap of the second liquid storage container during liquid transportation, and the valve body of the cap is pushed open by the tip of the discharge pipe of the adapter. The tip of the pipe is formed to be thin, so it can be easily inserted. At this time, the discharge port opened in the discharge pipe is located below the lower end of the mouthpiece. Next, by operating the pump unit in this state, the liquid is transported from the first liquid storage container to the second liquid storage container by the pump unit. At this time, the liquid passes through the discharge pipe of the adapter and is discharged from the discharge port to the second liquid storage container, and at the same time, the air in the second liquid storage container flows through the opening of the mouthpiece and the discharge pipe. The liquid is released from the second liquid storage container through the gap between the second liquid storage container and the second liquid storage container. In other words, during refueling, the discharge port opened in the discharge pipe is located below the lower end of the nozzle as described in 7 above, so even if the force of the liquid to be discharged is strong, the liquid will flow to the inner wall of the nozzle. The liquid flows into the second liquid storage container without colliding with the liquid. Therefore, the liquid does not collide with the inner wall of the cap and blow out air and liquid together from the opening of the cap due to the force as in the conventional case, and the liquid can be smoothly transported to the second liquid storage container.

In other words, the flow path resistance due to residual air is small, and refueling can be performed quickly and in a short time.Moreover, the liquid does not leak outside from the vicinity of the joint between the adapter and the mouthpiece, making it possible to refuel without getting your hands dirty. Furthermore, when the liquid is transported and the liquid level in the second liquid storage container reaches the liquid detection element installed near the inner tip of the discharge pipe, the pump unit automatically stops operating, as in the conventional case. This eliminates the troublesome problem of having to refuel and manually stop the pump while visually checking whether the tank has reached its full capacity. However, in addition to this, since the straight pipe part of the discharge pipe and the bent part of the discharge port have an elbow or bend shape, the liquid discharged during liquid conveyance can be delivered to the discharge pipe in a state with little pressure loss. Discharged diagonally downward from the outlet,
This works to prevent malfunctions such as the pump unit being stopped because the discharged liquid directly hits the liquid sensing element and the pump unit is mistaken for being full even though it is not.

Also, one important point is that since the pressure loss is small, even if the discharge pipe is configured to be thin, it is possible to quickly supply oil in a short period of time.

A refueling device that automatically stops at full capacity using a sensor that is already on the market has a chamber partitioned off by a partition wall inside the discharge pipe.
A liquid detection element is installed in the chamber, and the discharge pipe has a large diameter.

In the case of this current commercially available product, in which the cartridge tank's cap is removed and the discharge pipe is inserted into the tank for refueling, the thickness of the discharge pipe is not so much of a problem. In the case of a system in which oil is supplied without removing the valve, an important condition is that the diameter of the discharge pipe can be made small due to the dimensional constraints of the opening of the mouthpiece.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIGS. 1, 2@, 3, and 4, the first liquid storage container 16 is a polyester tank for storing kerosene, and a control section 19 is arranged above a pump unit 18 having a suction section 17. However, the adapter 20 and the pump unit 18 are connected by a hose 21. The state shown in FIG. 1 is a state in which the adapter 20 is attached to the base 23 of the cartridge tank, which is the second liquid storage container 22, and is being refueled. Further, 24 is an oil amount display section.

FIG. 2 shows the connecting portion between the adapter 20 of FIG. 1 and the base 23 of the cartridge tank, which is the second liquid storage container 22, and the structure of the vicinity thereof. FIGS. 3 and 4 show the configurations of the adapter 20 side and the base 23 and second liquid storage container 22 sides, respectively, when the adapter 20 and the base 23 are not connected.

First, the adapter 20 has a hook 26 that is hooked onto the lower end 25 of the base so that it can be attached and detached from the base 23 with a single touch, and a handle 27 that opens and closes by grasping the claw 26. The figure is approximately H-shaped. In addition, a hose connection part 28 for connecting a hose 21 that leads the liquid from the first liquid storage container 16 is located at the upper center of the approximately H-shaped adapter 20, and is also located at the lower center of the approximately H-shaped adapter 20. A discharge pipe 30 that is inserted into the opening 29 of the cap 23 and discharges the liquid conveyed from the first liquid storage container 16 into the second liquid storage container 22 is integrally formed of resin. Also, the tip 31 of the discharge pipe 30
The vicinity is tapered and narrow so that the discharge pipe 30 can be easily inserted into the opening 29 of the mouthpiece 23. Furthermore, the liquid detection element 32 is sealed in the radial direction near the inner lower part of the discharge pipe 30, and is filled in an elbow or bend shape on the inside of the curved part 38A of the straight pipe part and the discharge port a8 that opens on the side. It is constructed and fixedly installed. In this example,
Since a plurality of discharge ports 38 are provided, the liquid detection element 3
The second lead wire is located in the center and formed into an elbow shape to reduce fluid resistance. Therefore, when the discharge port 38 is located on the side surface, the lead wire may be eccentrically installed on the inner surface of the pipe on the opposite side to the discharge port 38 to form an elbow or bend shape.

This is to detect the full amount and automatically stop the pump unit 18 when the liquid in the second liquid storage container 22 reaches an appropriate amount. The distance between them is approximately 10 mm. The liquid detection element 32 includes a light emitting light receiving element 33 and a prism 3.
4 is a light reflection type sensor with a prism 34 installed downward, but this is because a prism is installed inside the discharge pipe 30 so that the liquid formed from the discharge port 38 does not directly come into contact with the surface of the prism 34. The liquid sensing element 32 is fixed with a radial seal with the liquid sensing element 34 facing downward. As a result, the prism 3
Malfunctions such as liquid flowing onto the surface of pump unit 18 and stopping of pump unit 18 can be prevented. In this case prism 3
4 may be a liquid sensing element in which a prism is formed not only in a downward direction but also in a horizontal direction. When a liquid sensing element having a horizontal prism is used, there is an effect that the distance between the discharging pipe tip 31 and the liquid sensing element 32 is about 10 mm, which allows the ejection pipe to be made shorter. In addition, the notch hole 35 at the tip 31 of the discharge pipe
When liquid accumulates in the second liquid storage container 22,
The side chamber 36 of the prism 34 is a hole for introducing the liquid into the discharge pipe from below, and the side chamber 36 of the prism 34 discharges the air inside the discharge pipe 30 to ensure that when the liquid level in the second liquid storage container 22 rises. This is a so-called air vent hole for enabling the liquid detection element 32 to detect the liquid. A lead wire 37 of the liquid detection element 32 is wired to the control section 19 through the inside of the discharge pipe 3o and the hose 21. A discharge port 38 opened on the side surface of the discharge pipe 30 is provided at a position below the lower end portion 25 of the base when the adapter 20 is attached to the base 23, and the liquid detection element 32 is located at a position below this discharge port. It is provided on the lower side of 38.

Next, the cap 23 connects to the cap screw portion 39 of the second liquid storage container 22.
It is screwed into place and sealed with a rubber gasket 4o.

Inside the cap 23, a compression spring 41 is installed in the opening 29 of the cap.
Press and energize with. When the valve body 43 equipped with the ring 42 is equipped with a ring, and the adapter 20 is not connected to the base 23, the opening 29 is sealed and closed. That is, the compression spring 41 is a biasing means that always biases the valve body 43 in a direction toward closing. Further, a spring receiver 44 crimped and fixed to the inside of the cap 23 and to the outside of the valve body 43 guides the valve body 43. A wide open window 45 is formed on the side surface of the spring receiver 44. The opening of this opening window 45 [1
The range is such that when the adapter 20 is connected to the base 23, the opening is at least from the discharge pipe tip 31 to a position above the discharge port 38.

In the above configuration, when refueling, the second liquid storage container 22 is installed with the base 23 facing upward as shown in FIGS. 1 and 2, and the tip of the discharge pipe 30 of the adapter 20 is inserted into the opening 29 of the base 23. If you push down the valve body 43 while inserting it,
By narrowing the outer diameter of the discharge pipe tip 31, there is an effect that insertion becomes much easier. Next, the hook of the adapter 20, which has a substantially H-shaped cross section, is engaged with the lower end 25 of the base while the claw portion 26 expands outward, thereby locking the adapter 20. At this time, between the inner diameter of the opening 29 of the cap 23 and the outer diameter of the discharge pipe 30, there is a second liquid storage container 2.
The container 22 has a gap through which the air inside the container 22 can flow out of the container 22 with almost no resistance.

Next, in this state, by turning on the operation switch 46 and operating the pump unit 1, the liquid is transported from the first liquid storage container 16 to the second liquid storage container 22 by the pump unit 1. At this time, the liquid is in hose 2
1 flows into the second liquid storage container 22 from the discharge port 3 through the discharge pipe 30 of the adapter 20 as shown by the solid line arrow in FIG. The liquid is discharged from the gap between the opening 29 and the discharge pipe 30 to the outside of the second liquid storage container 22 as indicated by the broken line arrow in FIG. At this time, since the discharge port 38 opened in the discharge pipe 30 is located below the lower end 25 of the mouthpiece 23, even if the force of the liquid to be discharged is strong, the liquid collides with the inner wall of the mouthpiece 23. The liquid flows into the second liquid storage container 22 without any liquid leakage. Therefore, unlike in the conventional case, the liquid does not hit the inner wall of the cap 2 and the air and liquid together spill out from the opening 3 of the cap 2 due to the momentum, and the liquid is smoothly transferred to the second liquid storage container 22. It has the effect of being able to be transported. In other words, since the liquid and air do not violently collide with each other within the mouthpiece 23 during refueling, there is less flow path resistance due to residual air.
Quickly and in a short time (this type of oil is produced, and the adapter 20 and port #L
No liquid leaks to the outside from the vicinity of the joint 23, and refueling can be done without getting the hands dirty.

Further, as a result of a prototype experiment, by providing the discharge port 38 at a position approximately 30 nm or more below the opening 29 of the mouthpiece, the liquid hits the inner wall of the mouthpiece 23, and the force causes air and liquid to flow through the opening 29 of the mouthpiece 23. We were able to confirm that it has the effect of eliminating the occurrence of boiling over all at the same time.

The liquid is then transported to the second liquid storage container 22, and before the liquid level reaches the height of the prism 34 of the liquid detection element 32, infrared light emitted from the light emitting element of the light emitting/receiving element 33 hits the prism 34. The light receiving element of the light emitting and receiving element 33 receives the reflected light and sends it as an electrical signal to the control unit 19 via the lead wire 37. When the height of 34 is reached and the prism 34 is immersed in the liquid, light is diffused from the surface of the prism 34 and the amount of reflected light received by the light emitting/receiving element 33 decreases.The change in the signal level is used to detect the full level of the liquid. do. Therefore, when the second liquid storage container 22 reaches full capacity, the liquid detection element 32 and the control section 19 function to automatically stop the operation of the pump unit 18. This action is convenient because it eliminates the hassle of having to manually stop the operation of the pump while refilling the pump while visually checking whether the tank is full.

In addition, the straight pipe 30 and the inner surface of the curved part 38A of the discharge port 38 that opens on the side surface are formed into an elbow or bend shape, and the liquid detection element 32 is installed below the discharge port 3B. The inner diameter of the discharge pipe 30, that is, the liquid conveyance passage, is not narrowed by the liquid detection element 32, and the inner surface of the bent portion 38A is in an elbow or bend shape, so pressure loss is reduced, so it is not necessary to increase the diameter of the discharge pipe 30. A large flow path area can be secured. Therefore, the adapter 20, which is thin, smart, and lightweight, has the unique effect of being able to transport liquid in a short time and being easy to handle and operate. Furthermore, by providing a discharge port 38 opening on the side surface of the discharge pipe 30 and installing a liquid detection element 32 below the discharge port 38, the liquid discharged from the discharge port 38 can be detected by the solid line in FIG. Discharge pipe 3 as shown by the arrow
It is discharged diagonally downward from the side of 0. That is, the liquid discharged during refueling can be discharged radially on the side surface of the discharge pipe 30 without splashing the liquid onto the liquid detection element 32 below the discharge port 38. Therefore, there is an effect that it is possible to prevent the operation of the pump unit 18 from being erroneously automatically stopped even though the second liquid storage container 22 has not yet been filled with liquid during refueling. This was also confirmed in the prototype of the present embodiment, which is a light reflection type sensor having a prism 34, in which the prism 34 is adhesively fixed downward to the inside of the discharge pipe 30 for radial sealing.

Furthermore, after stopping the refueling, the handle 27 of the approximately H-shaped adapter 20
By simply pinching the adapter 20 lightly, the claws 26 of the nine hooks of the adapter 20 expand, allowing the adapter 20 to be easily removed from the base 23, resulting in good operability and easy attachment and detachment. Since the adapter 20 and the base 23 are connected by engaging the lower end 25 of the base and the claw part 26 of the adapter, the adapter 20 can be attached by simply pushing it in lightly and simply grasping the handle part 27 lightly. You can leave with .

In this manner, the unique effect of being able to attach and detach the adapter 20 in a very simple and reliable manner can be obtained.

Effects of the Invention As described above, the liquid transport device of the present invention provides the following effects.

(1) The adapter can be detachably attached to the cap of the second liquid storage container, and there is no need to touch the cap directly, so there is an effect that refueling can be done without getting the hands dirty.

(2) In addition to a configuration in which the adapter can be detachably attached to the cap of the second liquid storage container, the tip of the discharge pipe of the adapter easily pushes open the valve body of the cap, and the adapter has a liquid detection element. Therefore, refueling can be performed without the trouble of removing the cap, and furthermore, the pump unit can be automatically stopped when the second liquid storage container reaches the desired liquid level.

(3) The straight part of the discharge pipe and the curved part of the outlet opening on the side have an elbow or bend shape on the inner surface, and a liquid detection element is installed below the outlet, making the diameter of the discharge pipe thicker. Even if there is no pressure loss, the pressure loss will not increase. Therefore, it has the unique effect of being able to transport liquid in a short time with a thin, smart, and lightweight adapter, as well as being easy to handle and operate.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of the overall structure of a liquid conveyance device according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of the same liquid conveyance device in a state where an adapter and a base are combined, and FIG. FIG. 4 is a front cross-sectional view of the adapter side of the liquid conveyance device, FIG. 5 is a front cross-sectional view of the mouthpiece side of the liquid conveyance device, and FIG.
FIG. 6 is a partial cross-sectional view of an IJ tank and a partial cross-sectional view of a conventional liquid conveying device. 16...First liquid storage container, 18...Pump unit, 20...Adapter, 22...
・・Second liquid storage container, 23 ・・Cap, 30 ・−
...Discharge tube, 32...Liquid detection element, 34
... Prism, 3rd, outlet, 38A... bent part,
43...Patent attorney 1, name of agent: Patent attorney Toshio Nakao and 1 other person/Otsu --- The power of the first IIX,
! Contents volume 18° - Bonf unit zo - agfri ZZ - - 1st 2nd y) You soft Ell again, you l (Z, 3-
One piece of money 34゛゛7' Wasum 1 Fig. Fig. Fig. 3 δ? Diagram

Claims (1)

[Claims] a pump unit that transports the liquid in the first liquid storage container; a cap provided in the second liquid storage container and having a valve body; an adapter that communicates with the liquid through a conduit and has a liquid detection element, and the adapter includes a discharge pipe portion in which an inner surface of a curved portion between a straight pipe portion and a discharge port opened on a side is shaped like an elbow or a bend. . A liquid conveyance device, wherein the outer diameter of the tip of the discharge pipe is made thin, and the liquid detection element is provided below the discharge port.