JPH09178161A - Refueling tank and liquid container lid - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A lid of a liquid container that does not close diagonally, keeps airtight even if the screw is not tightened to the end, and does not leak dangerous liquid from the liquid container. . A fuel tank for a liquid fuel combustion system that maintains airtightness even with insufficient screwing and does not leak liquid fuel. An outer peripheral portion of a guide cylinder projecting inside the lid and an inner wall portion of the liquid supply port are configured to be slidable, and have a function of guiding screw engagement between the lid and the liquid supply port. An O-ring is inserted into the guide cylinder, and the O-ring is pressed against the inner wall of the liquid supply port to keep airtightness when the screw part of the liquid supply port and the screw part of the lid are engaged. Packing is interposed between the screw portion for the lid to screw with the liquid supply port and the guide tube, and when the lid and the liquid supply port are screwed to the end, the upper end of the liquid supply port and the screw part of the lid are A structure in which the packing is tightened and sealed between the upper wall portions. Further, the above configuration can be applied to the fuel tank of the liquid fuel combustion device. The guide cylinder has a valve support function that locks the valve spring that biases the valve that opens and closes the liquid fuel outlet of the fuel filler cap in the sealing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a liquid container for dangerous chemicals or the like if it leaks, but it can also be applied to a fuel tank of a liquid fuel combustion apparatus such as an oil heater.

[0002]

2. Description of the Related Art If the lid of a liquid container containing dangerous chemicals leaks is insufficiently tightened, or the lid is forcibly screwed at an angle and is not closed well, the liquid inside may be dangerous. It happened.

Even in the fuel tank of the liquid fuel combustion apparatus, the fuel cap is not tightened sufficiently, or the fuel cap is screwed obliquely forcibly and is not closed well, so that the liquid fuel inside may leak and a fire may occur. May occur.

An example of a fuel tank of a liquid fuel combustion system will be described below. FIG. 2 is a cross-sectional view showing a state in which the refueling tank 1 is set in the combustion tank 3 in a vertical core type oil stove as an example of the liquid fuel combustion apparatus. FIG. 2 is a sectional view showing a state in which the fuel tank 1 of the present invention is set in the combustion tank 3, which will also be described below. The part of the conventional oil supply tank 1 for the oil supply cap 2 is shown in FIG.

In FIG. 2, a core inner cylinder 4 erected on the bottom of the combustion tank 3 and a core outer cylinder 6 mounted on the upper part of the combustion tank 3 via a packing 5 are guided so as to be vertically movable. A core 7 is provided. A push-up pin 91 for opening the valve 8 (see FIG. 8) of the fuel filler cap 2 and a liquid fuel tray 9 provided with a liquid fuel outlet 92 are provided on the right side of the upper surface of the combustion tank 3. Has been done. The refueling tank 1 can be detachably attached to the liquid fuel tray 9.

Next, in FIG. 8, the oil supply port 1 provided with the male screw 101 in the oil supply tank 1 is wound with a sealing agent in an airtight state. A female screw 2 is provided below the refueling cap 2.
01 is provided, and when the male screw 101 of the refueling tank 1 and the female screw 201 of the refueling cap 2 are screwed together, the refueling tank 1
Airtightness is maintained by the annular packing 15 provided on the upper end 102 of the male screw 101 and the step portion 204 of the female screw 201 of the fuel cap 2.

The liquid fuel outlet 20 of the refueling cap 2
The valve support 17 has a valve support function of locking the valve spring 13 that biases the valve 8 that opens and closes the valve 3 in the sealing direction. The valve support 17 is fixed to the upper portion of the fuel cap 2. An O-ring 12 is fitted and attached to the valve 8 in order to increase the sealing function of the valve.

Although not particularly shown, this valve support 1
A plurality of holes are formed in the outer peripheral portion of the fuel tank 7 for allowing liquid fuel to flow from the fuel tank 1 to the combustion tank 3 when the fuel tank 1 is attached to the combustion tank 3.

In the above structure, each screw portion 101,
Since 201 does not have a guide portion, it may be diagonally closed to cause poor mating, or if the refueling cap 2 is insufficiently tightened, the packing 15 does not function as airtight, causing leakage or bleeding of liquid fuel. It was

[0010]

If the liquid container containing dangerous chemicals or the like leaks, the liquid inside may leak and cause a danger. In this case, the leakage of the liquid may be caused by the container lying sideways and the liquid directly bleeding, and also by vaporization due to the container not being sealed by the lid, or by chemical changes in the internal chemical substances. It is possible that poisonous gas leaks from the container.

In the above conventional liquid fuel combustion apparatus, the refueling cap 2 is not completely closed after the refueling tank 1 is filled with the liquid fuel, or the engagement between the refueling cap 2 and the refueling port 10 is uncertain. If the refueling tank 1 is set in the liquid fuel combustor as it is, the refueling cap 2 side of the refueling tank 1 is placed downward, so that the leaking liquid fuel is ignited by the combustor to cause a fire or refueling. After setting the tank 1, there has been a problem that the liquid fuel overflows from the combustion tank 3 and the surroundings of the combustion device are contaminated.

The present invention has been made in view of the above conventional problems, and an object thereof is to ensure that the screw portion of the lid 20 is engaged with the liquid container 21 and tighten the screw portion of the lid 20. Even if it is loose, it is to provide a lid for a liquid container that can prevent the above-mentioned unexpected situation by preventing liquid leakage.

Further, it is applied to the refueling cap 2 of the refueling tank 1 of liquid fuel which is dangerous if it leaks, so that the screw part is surely engaged, and even if the screwing of the refueling cap is loose, the internal liquid This is to prevent fuel leakage.

[0014]

In order to solve the above-mentioned problems, the lid of the liquid container of the present invention has a guide tube projecting from the inside of the lid, and the liquid container and the outer peripheral portion having a predetermined vertical width or more. The inner wall of the liquid supply port having a predetermined vertical width or more is slidably configured,
The lid and the liquid supply port of the liquid container are screwed together.

Further, in the lid of the liquid container of the present invention, an O-ring is inserted into the outer peripheral portion of the guide cylinder of the lid so that the screw portion of the liquid supply port of the liquid container and the screw portion of the lid are engaged with each other. The O-ring is brought into pressure contact with the inner wall portion to maintain airtightness.

Further, in the lid of the liquid container of the present invention, packing is interposed between the screw portion for screwing with the liquid supply port of the liquid container and the guide tube, and the lid and the liquid supply port of the liquid container are the last. When it is screwed up, the packing is tightened and sealed between the upper end of the liquid supply port and the upper wall portion of the screw portion of the lid.

In the fuel tank of the liquid fuel combustion apparatus of the present invention, the lid of the liquid container is replaced with the fuel cap of the fuel tank, and the liquid inlet of the liquid container is read with the fuel port of the fuel tank.

Further, in the fuel tank of the liquid fuel combustion apparatus of the present invention, the guide cylinder has a valve support function for locking a valve spring for urging the valve for opening and closing the liquid fuel outlet of the fuel cap in the sealing direction. It is a thing.

According to the present invention, when the lid is fastened to the liquid supply port of the liquid container, the outer peripheral portion of the guide cylinder projecting inside the lid has a predetermined vertical width or more and the inner wall portion of the liquid supply port has a predetermined vertical width or more. Since the lid is slidable and guided, the lid does not close diagonally, the lid and the liquid supply port can be easily screwed together, and liquid leakage from the liquid container due to poor screwing can be prevented. it can.

Further, an O-ring is inserted into the outer peripheral portion of the guide cylinder,
Since the screw part of the liquid supply port and the screw part of the lid are engaged with each other, the O-ring is pressed against the inner wall part of the liquid supply port to maintain airtightness.
Even if the lid and the liquid supply port are not screwed to the end, airtightness is maintained and liquid leakage from the liquid container can be prevented.

A packing is interposed between a screw portion for screwing the lid to the liquid supply port and the guide tube, and when the lid and the liquid supply port are screwed to the end, the upper end of the liquid supply port and the lid are described above. Since the structure is also provided in which the packing is tightened and sealed between the upper wall portions of the screw portion, the O-ring between the inner wall portion of the liquid supply port and the guide tube is pressed when the liquid supply port and the lid are engaged, Combined with the structure where airtightness is maintained even if the screwing is not tightened to the end, double airtightness can be secured and the safety against liquid leakage is improved.

In this manner, in the lid of the liquid container for dangerous chemicals or the like that leaks, if the screw portion is securely engaged, even if the screw portion of the lid is loosely tightened, the liquid that does not leak inside A lid for the container can be provided.

In the above description, when the lid of the liquid container is replaced with the oil filler cap of the oil tank and the liquid inlet of the liquid container is replaced with the oil inlet of the oil tank, the fuel tank is prevented from leaking liquid fuel. it can.

Further, the guide cylinder is provided with a valve support function for locking the valve spring for urging the valve for opening and closing the liquid fuel outlet of the fuel filler cap in the sealing direction to guide the screw engagement between the fuel filler cap and the fuel filler port. Since one guide cylinder has both the function and the valve support function, it is possible to provide an inexpensive fuel tank for a liquid fuel combustion device.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a lid for a liquid container according to the present invention will be described below with reference to FIG. When trying to close the lid 20 on the liquid container 21, the outer diameter of the guide cylinder 14 projecting inside the lid 20 is equal to the liquid supply port 22 of the liquid container 21.
Since the outer peripheral portion of the guide cylinder 14 and the inner wall portion 103 are slightly smaller than the inner diameter of the inner wall portion 103, the vertical width of the inner wall portion 103 is more than a predetermined value, that is, there is no point contact. Guide the user to insert it straight into the mouth 22. Female screw 201 of lid 20 and male screw 1 of liquid supply port 22
Even if the screwing of 01 is incomplete, that is, even if it is not closed to the end, the O-ring 16 inserted into the groove 142 on the outer peripheral portion of the guide cylinder 14 presses against the inner wall portion 103 of the liquid supply port 22 to maintain airtightness. Prevent leaking of dangerous liquid inside.

Further, when the screwing is completed, that is, when it is properly closed until the end, the upper end portion 23 of the liquid supply port 23 and the upper wall portion 2 of the lid 20 are closed.
Due to the annular packing 15 between 05, it is kept double-tight.

Next, an embodiment of an oil supply tank and an oil supply cap according to the present invention will be described in detail below with reference to the drawings.

The same components as those in the prior art are designated by the same reference numerals.

FIG. 2 is a sectional view of the fuel tank 1 of the present invention set in a combustion tank 3, FIG. 3 is a sectional view of the fuel tank 1 of the present invention with an oil cap 2 attached, and FIG. 5 is a perspective view of the fuel tank 1 and the fuel cap 2 of FIG.
Is an exploded perspective view of the refueling cap 2 of the present invention, FIG. 6 is a cross-sectional view of the refueling tank 1 in which the refueling cap 2 is shallowly attached and the engagement is incomplete, and FIG. In order to explain the effect of the invention, an operation diagram when the refueling cap 2 is attached to the refueling tank 1 is shown.

An outline of the refueling tank 1 and the refueling cap 2 according to the present invention will be described. This is mainly shown in FIGS. 2 and 3, in which a core inner cylinder 4 is erected on the bottom of the combustion tank 3.
And a core outer cylinder 6 mounted on the upper part of the combustion tank 3 via a packing 5 are provided with a core 7 which is vertically movable.

On the right side of the upper surface of the combustion tank 3, a push-up pin 91 for opening the valve 8 of the fuel filler cap 2 in the center and a liquid fuel tray 9 provided with a liquid fuel outlet 92 are provided.
Are arranged. The refueling tank 1 can be detachably attached to the liquid fuel tray 9.

Next, referring to FIG. 3, the oil supply tank 1 is provided with a male screw 101, and an oil supply port 10 is tightly wound with a sealant. The male screw 101 has a fuel filler port upper end 102.
When the male screw 101 of the refueling tank 1 and the female screw 201 of the refueling cap 2 are screwed together as in the conventional example, the upper end 102 of the refueling port of the male screw 101 of the refueling tank 1 and the female screw 201 of the refueling cap 2 are engaged. Airtightness is maintained by the annular packing 15 provided on the step portion 204. The packing 15 is made of a material that has elasticity and can be sealed when pressed.

In the present invention, unlike the conventional example, an annular inner wall portion 103 in which the upper end 102 of the oil supply port is extended inward is further provided,
The feature is that the inner wall portion 103 and the guide cylinder 14 protruding from the inside of the fuel filler cap 2 are fitted together. That is,
Since the inner diameter of the inner wall portion 103 of the oil supply port 10 is set to be slightly larger than the outer diameter of the guide cylinder 14 and the outer peripheral portion and the inner wall portion 103 of the guide cylinder 14 have a predetermined vertical width or more, that is, they do not make point contact. Therefore, the guide tube 14 is slidable so that it is guided by the inner wall portion 103 and is inserted straight.

Although the inner wall portion 103 is folded back inward in this embodiment, it is not shown, but the inner wall portion may be formed by extending the small diameter portion upward without folding back inward.

When the refueling tank 1 is attached to the combustion tank 3, a plurality of small holes 141 for allowing liquid fuel to flow from the refueling tank 1 to the combustion tank 3 are provided in the lower outer peripheral portion of the guide cylinder 14, and the refueling cap 2 A groove 142 to which the O-ring 16 can be attached is provided in an intermediate height portion of the outer circumference of the guide cylinder 14, and the O-ring 16 is inserted and fitted therein.

The guide cylinder 14 is provided with a valve support function for locking the valve spring 13 for urging the valve 8 for opening and closing the liquid fuel outlet 203 of the fuel filler cap 2 in the sealing direction so that the fuel filler cap and the fuel filler screw are screwed. Function to guide the joint and valve support function (Fig. 9 of the conventional example)
The function of the valve support 17 shown in FIG. Moreover, in order to increase the sealing function of the valve 8,
The O-ring 12 is fitted and mounted.

A female screw 201 is provided in the lower portion of the cap 11, a step portion 204 for mounting the annular packing 15 is provided, and an upper portion 202 is provided with a valve 8 provided with an O-ring 12 and a valve spring 13. The guide tube 14 is fitted and fixed via the interposition. A sealing agent is applied to the fitting and fixing of the cap 11 and the guide tube 14 to make them airtight.

Next, the operation of mounting the refueling cap 2 on the refueling tank 1 will be described.

When the refueling tank 1 shown in FIG. 4 is closed with the refueling cap 2 and the lid is closed, if the refueling cap 2 is tried to be obliquely tightened as shown in FIG. 7, the guide cylinder 14 of the refueling cap 2 refuels. Guided by the inner wall portion 103 provided in the mouth 10, the female screw 201 of the oil supply cap 2 and the male screw 101 of the liquid supply port 10 are substantially engaged with each other, so that they can be easily tightened.

That is, even if the refueling cap 2 is to be tightened diagonally with respect to the refueling port 10, the guide cylinder 1 of the refueling cap 2
4 hits the inner wall portion 103 of the fuel filler port 10, and the fuel filler cap 2 cannot be attached to the fuel filler port 10.

Since the outer peripheral portion and the inner wall portion 103 of the guide cylinder 14 have a predetermined vertical width and are not in point contact with each other, the guide cylinder 14 is attached straight to the fuel filler opening 10 only when the guide cylinder 14 is attached to the inner wall portion. Inserted inside 103
The female screw 201 of the fuel filler cap 2 is the male screw 1 of the fuel filler port 10.
It can be combined with 01.

The outer peripheral portion of the guide cylinder 14 and the inner wall portion 103 of the fuel filler port 10 are slidable by inserting a vertical width of a predetermined amount or more. Here, the vertical width of not less than a predetermined value means that the point contact is not made.

Next, as shown in FIG. 6, when the refueling cap 2 is engaged with the refueling port 10 to some extent, it is inserted into the groove 142 at the intermediate height portion of the outer peripheral portion of the guide cylinder 14 of the refueling cap 2. The ring 16 has an inner wall portion 10 provided in the fuel filler opening 10.
3 is pressed. From this time, the refueling tank 1 is in a hermetically sealed state, and the refueling cap 2 is already airtight without being completely closed.

At this time, the packing 15 is still in the filling port 10.
Is not in contact with the upper end 102 of the. When the refueling cap 2 is tightened from this state, the O-ring 16 rotationally slides while being in pressure contact with the inner wall portion 103 of the refueling port 10. When the refueling cap 2 is completely closed, the packing 15 comes into pressure contact with the upper end 102 of the refueling port 10 as shown in FIG.

The refueling cap 2 is thus kept airtight by the O-ring 16 and the packing 15.

For the sake of caution, in FIG. 3, the oil supply cap 2 is used as the lid 20 (FIG. 1), the valve 8, the valve spring 13 and the O-ring 12 are omitted, and the step portion 204 of the lid 20 is omitted. If the upper wall portion 205 (FIG. 1) of the screw portion, the refueling tank 1 is the liquid container 21 (FIG. 1), the refueling port 10 is the refueling port 22, and the refueling port upper end 102 is the refueling port upper end 23, it is dangerous to leak. It has the same function as in FIG. 1 described as a lid of a liquid container.

[0047]

Since the lid of the liquid container according to the present invention is configured as described above, when the lid is fastened to the liquid supply port of the liquid container, the lid does not close obliquely, and the lid and the liquid supply are closed. The screwing of the mouth is facilitated, and the liquid leakage from the liquid container caused by the screwing failure can be prevented.

Further, the O-ring inserted in the guide tube maintains airtightness even if the lid and the liquid supply port are not screwed all the way to the end, and liquid leakage from the liquid container can be prevented.

Further, it is possible to secure double airtightness between the lid and the liquid supply port for sealing by packing and sealing by O-ring pressure contact,
Improves safety against liquid leakage such as dangerous chemicals.

Further, even when applied to a fuel tank of a liquid fuel combustion apparatus, the safety against liquid fuel leakage is improved and a fire or the like can be prevented.

Further, the function of guiding the screwing of the fuel filler cap and the fuel filler port and the valve support function of locking the valve spring for urging the valve for opening and closing the liquid fuel outlet of the fuel filler cap in the sealing direction are
Since it has two guide tubes, the cost will be low.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a lid of the present invention is attached to a liquid container.

FIG. 2 is a sectional view of the fuel tank of the present invention set in a combustion tank of a liquid fuel combustion apparatus.

FIG. 3 is a sectional view of the fuel tank of the present invention with a fuel cap attached.

FIG. 4 is a perspective view of a fuel tank and a fuel cap of the present invention.

FIG. 5 is an exploded perspective view of the oil supply cap of the present invention.

FIG. 6 is a cross-sectional view showing a state in which the refueling cap is shallowly attached to the refueling tank and the engagement is incomplete in order to explain the effect of the present invention.

FIG. 7 is an operation diagram when a fuel cap is attached to a fuel tank to explain the effect of the present invention.

FIG. 8 is a sectional view of a conventional fuel tank with a fuel cap attached.

[Explanation of symbols]

 1 Refueling tank 2 Refueling cap 3 Combustion tanks 5 and 15 Packing 8 Valve 9 Liquid fuel tray 10 Refueling port 11 Cap 12, 16 O-ring 13 Valve spring 14 Guide cylinder 17 Valve support 20 Lid 21 Liquid container 22 Liquid supply port 23 Liquid supply Top end 101 Male screw (screw part of refueling port or liquid supply port) 102 Top refueling port 103 Inner wall part 142 Groove 201 Female screw (screw part of refueling cap or lid) 203 Liquid fuel outlet 204 Step part 205 Upper wall part

Claims (5)

[Claims] 1. A lid, which is screwed to the outer peripheral portion of a liquid supply port of a liquid container, has a guide cylinder projecting therein, and the outer peripheral portion having a predetermined vertical width or more of the guide cylinder is supplied to the liquid container. A lid for a liquid container, wherein the lid is slidable on an inner wall portion having a predetermined upper or lower width of a mouth. 2. An O-ring is inserted into an outer peripheral portion of the guide cylinder of the lid, and the O-ring is inserted into the inner wall portion of the liquid supply port when the screw portion of the liquid supply port of the liquid container and the screw portion of the lid are engaged with each other. The lid of a liquid container according to claim 1, wherein the ring has a structure in which the ring is pressed to maintain airtightness. 3. The lid has a packing interposed between a screw portion for screwing with a liquid supply port of a liquid container and the guide tube, and when the lid and the liquid supply port of the liquid container are screwed to the end. The lid of the liquid container according to claim 1 or 2, further comprising a structure in which the packing is clamped and sealed between an upper end of the liquid supply port and an upper wall portion of the screw portion of the lid. 4. The lid is a refueling cap,
The refueling tank according to 2 or 3. 5. The guide cylinder is provided with a valve support function for locking a valve spring for urging the valve for opening and closing the liquid fuel outlet of the fuel filler cap in the sealing direction. A refueling tank of the liquid fuel combustion apparatus described.