JPH09196211A - Valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reasonably priced and sure valve capable of preventing the leakage of a fluid. SOLUTION: A valve 24 is composed of a cylinder barrel and a reverse conical case 19. A rotating lever 12 is arranged in the cylinder barrel so as to be freely rotated by using a supporting part 7 as a fulcrum. A compression spring 15 is provided in the circular projecting part 13 of the lower arm part 12b of the rotating lever 12. When a device having the valve 24 is tilted or turned over, a spherical member 23 in the case 19 is moved, an opening/closing valve 14 attached to the lower arm part 12b of the rotating lever 12 pressed by the spherical member 23 seals an outlet 8a by the elastic force of the compression spring 15 and thus the leakage of a fluid is prevented.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a valve for circulating and shutting off a fluid. More specifically, the present invention relates to a valve that does not require a tilt sensor or a power source by operating an on-off valve that cuts off the communication of a flow path with a spherical member that moves when the device tilts or falls.

[0002]

2. Description of the Related Art For example, a petroleum stove, a gas stove, an air purifier, etc. are provided with a valve for preventing gas such as liquid or gas in the apparatus from leaking out when the apparatus is tilted or falls.

FIG. 4 shows a conventional example of the valve 1 used for such a purpose. A cylindrical cylinder tube 10 is provided substantially in the center of the inside of the cylinder case 9 that constitutes the valve 1.
Is provided, and the liquid can be freely sent from the suction pipe 7 disposed in the cylinder cylinder 10 to the discharge pipe 8. For example, the suction pipe 7 is connected to a connecting pipe of a tank in which oil or the like is stored, and the discharge pipe 8 is connected to a connecting pipe for sending the oil to a combustion chamber for burning the oil.

A cylindrical plunger 2 which is movable in the axial direction and is liquid-tight is fitted in a cylinder hole 11 formed inside the cylinder cylinder 10. An opening / closing valve 4 made of an elastic material such as rubber is provided at the tip of the piston 2a arranged on the plunger 2, while the other end of the plunger 2 and the side surface of the cylinder case 9 (right side in FIG. 4). A compression spring 5 is provided between the cylindrical portion 3 (extended end of the piston 2a) formed in the central portion.

Normally, the coil 6 provided around the cylinder cylinder 10 is energized, so that the plunger 2 is shown in FIG.
As shown in FIG. 3, the compression spring 5 is attracted to the cylindrical portion 3 side against the elastic force. Since the on-off valve 4 separates from the discharge port 8a of the discharge pipe 8, the liquid flows out from the suction pipe 7 to the discharge pipe 8.

When the device provided with the valve 1 is largely tilted or falls, the tilt or fall is detected by a tilt sensor (not shown) attached to the bottom of the device, and the device is based on this detection output. The power supply to the coil 6 is cut off, and the power supply to the coil 6 is cut off. As a result, the plunger 2 that has been sucked toward the cylindrical portion 3 projects toward the discharge pipe 8 due to the elasticity of the compression spring 5. As a result, the opening / closing valve 4 causes the discharge port 8
The a is blocked, the flow path to the suction pipe 7 is blocked, and the liquid is prevented from leaking through the discharge pipe 8.

[0007]

In the case of the conventional valve 1 shown in FIG. 4, an inclination sensor for detecting the inclination or overturning of the device is required, and since the plunger 2 is used, the valve 1 is always used. A power supply board or the like for supplying power is required, which causes a problem of increased cost.

Therefore, the present invention solves the above-mentioned problems and proposes a valve that is highly safe and inexpensive to manufacture.

[0009]

In order to solve the above-mentioned problems, in the present invention, there is provided a valve for circulating and shutting off a fluid, the case having an inverted conical shape having an opening edge portion at the lowermost portion, and a case. A spherical member movably housed therein, and a lever rotatably pivotally mounted, having one end arranged in a position facing the inside of the inverted cone from the opening edge portion and the other end having an opening / closing valve for the flow path. And the lever is rotated with the movement of the spherical member, and the flow path is blocked by the opening / closing valve.

When the device tilts or falls, the valve also tilts, and the spherical member in the case moves (rolls) accordingly. As a result, the rotary lever, the operation of which is blocked by the spherical member, rotates clockwise. An open / close valve is attached to the rotary lever, and the open / close valve is displaced toward the discharge pipe by the rotation of the rotary lever, and the discharge port is closed by this open / close valve. This prevents the liquid or gas sucked through the suction pipe 7 from leaking through the discharge pipe 8.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a valve according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the structure of a valve 24 which is an embodiment of the present invention. As shown in FIG. 2, the valve 24 is composed of a cylinder cylinder 22 formed in a cylindrical shape, and a case 19 having an inverted conical bottom portion at the top of the cylinder cylinder 22 so as to communicate with the cylinder cylinder 22. A spherical member 23 having a predetermined weight is housed in the case 19.

The upper opening of the case 19 is a disk-shaped lid 16
Is blocked by A hollow cylindrical portion 21 is formed in the central portion of the lid body 16, and the open end of the case 19 can be mounted in a recess formed by the outer peripheral surface of the cylindrical portion 21 and the inner peripheral surface of the lid body 16. It Further, the claw portion 30 of the case 19
Is engaged with an engagement hole 31 formed in the lid body 16, and the lid body 16 and the case 19 are attached to each other by an O-ring 20 mounted between the engaging hole 31 formed in the lid body 16 and the groove 25 formed in the upper opening end of the case 19. It is hermetically sealed to be liquid-tight and air-tight.

One end of the cylinder tube 22 (on the left end side in the figure)
A discharge pipe 8 of which a part projects is arranged inside the cylinder cylinder 22, and a suction pipe 7 is arranged immediately below the cylinder cylinder 22. The gas such as liquid or gas sucked from the suction pipe 7 (hereinafter collectively referred to as “fluid”) is the cylinder cylinder 2.
It is led to the discharge pipe 8 via 2.

As shown in FIG. 1, the open end side (right side in FIG. 1) of the cylinder tube 22 is closed by a disk-shaped end plate 18. A cylindrical portion 21 having an inner concave portion 26 is formed in the central portion of the end plate 18, and is fitted between the outer peripheral surface of the cylindrical portion 21 and a concave groove 25a formed at the open end of the cylinder tube 22. The cylinder 20 and the end plate 18 are liquid-tightly sealed by a ring 20. The large diameter side of the compression spring 15, which will be described later, comes into contact with the recess 26.

A rotary lever 12 for opening and closing the flow path to the discharge pipe 8 is arranged in the cylinder cylinder 22, and the rotary levers 12 are fixed to both sides of the cylinder cylinder 22 as shown in FIG. It is rotatably provided around a pair of supporting portions 27, 27. As shown in FIG. 1, the rotary lever 12 is an upper arm portion 12 formed integrally so as to have a substantially “C” shape.
The upper arm portion 12a is formed of a and the lower arm portion 12b, and the upper arm portion 12a is selected in such a length that the tip of the upper arm portion 12a faces the opening edge portion 29 of the case 19.

The lower arm portion 12b of the rotating lever 12 has a discharge pipe 8
The opening / closing valve is selected to have a length facing the exhaust port 8a of the exhaust pipe 8 and an elastic material such as rubber larger than the pipe diameter of the exhaust port 8a of the exhaust pipe 8 is used on the left surface of the lower arm portion 12b. 1
4 is attached, and the opening / closing valve 14 is a compression spring 1
It is pressed by the elastic force of 5 toward the discharge port 8a which is the closing direction of the flow path. Therefore, the small diameter side of the conical compression spring 15 is fitted into the circular protrusion 13 provided on the right surface of the lower arm portion 12b, and the one large diameter side is pressed against the recess 26 of the end plate 18. The elastic force of the compression spring 15 is the spherical member 2
It is selected to be easily compressed by the rotating lever 12 transmitting the weight of 3.

As shown in FIG. 1, the valve 24 is not tilted when the apparatus is in a horizontal state (a state in which the valve 24 is not tilted or overturned), so that the spherical member 23 is stopped at the vertical portion of the case 19 and is located at the center. It is located at the opening edge portion 29.

When the spherical member 23 is positioned at the opening edge 29, the upper arm 12a of the turning lever 12 is pushed by the spherical member 23, so that the lower arm 12b receives the elastic force of the compression spring 15. On the contrary, it is biased counterclockwise with the support portion 27 as a fulcrum. Therefore, in this state, the opening / closing valve 14 is separated from the discharge port 8a of the discharge pipe 8, and the fluid communicates with the discharge unit 8 through the suction unit 7.

On the other hand, when the device equipped with such a valve 24 tilts or falls, the valve 24 also tilts as shown in FIG. 3, and the spherical member 23 in the case 19 is accompanied by this.
Moves (rolls) away from the opening edge portion 29 as shown in FIG. As a result, the upper arm 12a of the rotary lever 12 pressed by the spherical member 23 becomes free, and the lower arm 12b of the rotary lever 12 is displaced toward the discharge pipe 8 by the elastic force of the compression spring 15. As a result, the opening / closing valve 14 closes the discharge port 8a of the discharge pipe 8 and functions as a safety valve that blocks the flow path to the discharge pipe 8. Since the bottom of the case 19 is formed in an inverted conical shape as described above, there is no direction for safe operation, and the valve 24 can be immediately actuated when the device falls in all directions (360 °). .

When the device returns to its original stable position (horizontal state), the spherical member 23 automatically returns to the opening edge portion 29 of the case 19 again, and the spherical member 23 again causes the upper arm portion 12a of the rotating lever 12 again. Will be pressed. As a result, the lower arm portion 12b of the rotating lever 12 rotates counterclockwise around the fulcrum of the support portion 27 against the elastic force of the compression spring 15, and the opening / closing valve 14 separates from the discharge port 8a and the suction pipe 7 is formed. The discharge pipe 8 communicates.

As described above, since the valve 24 operates with a mechanical structure, the cost can be reduced without the need for an inclination sensor for detecting the inclination or overturning of the device, a microcomputer power source for control, or the like.

Further, since the valve 24 of the present invention does not require a power source, the valve 24 is operated not only when the device is installed but also when the device is moved, for example, when the device is tilted more than necessary. Therefore, the present invention is suitable for application to petroleum stoves, gas stoves, air purifiers, etc., which require safety when the device falls over.

[0024]

As described above, the present invention is a valve for circulating and shutting off a fluid, which has an inverted conical case having an opening edge at the lowermost portion and is movably housed in the case. The spherical member has a spherical member, one end of which is arranged at a position facing the inside of the inverted cone from the opening edge portion, the other end of which has an opening / closing valve for the flow path, and a lever which is pivotally supported. The lever is rotated along with the movement, and the flow path is blocked by the opening / closing valve.

Therefore, according to the present invention, the inclination sensor for detecting the inclination and the fall of the device, the microcomputer power supply for control, etc. are not required, and the cost can be reduced, and the fluid leaks even when the electric circuit of the microcomputer or the like fails. It can be surely prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a valve 24 according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing a state where the valve 24 is tilted.

FIG. 4 is a sectional view showing a structure of a conventional valve 1.

[Explanation of symbols]

 1, 24 valve 2 plunger 5, 15 compression spring 7 suction pipe 8 discharge pipe 9 cylinder case 12 turning lever 14 opening / closing valve 18 end plate 19 case 21 cylindrical portion 22 cylinder barrel 23 spherical member 27 support portion

Claims (2)

[Claims] 1. A valve for circulating and shutting off a fluid, the case having an inverted conical shape having an opening edge portion at a lowermost portion, a spherical member movably accommodated in the case, and one end having the opening. The lever is arranged at a position facing the inside of the inverted cone from the edge portion, has a flow path opening / closing valve at the other end, and has a lever rotatably pivotally supported. A valve which rotates and whose flow path is blocked by the on-off valve. 2. The valve according to claim 1, wherein the on-off valve is always biased in the closing direction of the flow path.