KR200444303Y1 - Automatic gas interrupting device - Google Patents

Abstract

The present invention discloses a gas automatic shutoff device.

Gas automatic shut-off device of the present invention is provided with a valve seat formed of a ring-shaped silicone rubber upper surface is concave in the shape of a hemisphere, the valve seat is installed and a support jaw having a predetermined magnetic force is formed, the inner circumference A nonmagnetic valve body radially protruding a plurality of spacers; A valve ball made of a magnetic material, formed with a diameter smaller than the inner diameter of the valve body, mounted on an upper surface of the valve seat, and kept concentric with the valve body by the plurality of spacers; Permanent magnet bushing coupled to the outer periphery of the valve body to move in the center direction for the permanent magnet to open and close the valve ball consisting of a single body having an appropriate thickness and upper and lower width; A mechanical timer having a circular cam having a cam groove on its outer periphery and an operation knob for setting a time on the drive shaft, the drive shaft being reversely rotated as time passes after a predetermined time is set by forward rotation of the drive shaft; One end is pivotally connected to the permanent magnet bushing, the other end is elastically biased to be in close contact with the outer periphery of the circular cam to seesaw movement by the rotation of the circular cam to move the permanent magnet bush reciprocating movement; It provides a gas automatic shutoff device.

According to the present invention, the gas is supplied only by the timer for a set time and the gas supply can be automatically cut off after the set time has elapsed. Accordingly, even if the gas device is ignited and left for a long time or the intermediate valve is not locked after extinguishing, It is possible to reliably prevent the risk of explosion accident.

Gas line, timer, permanent magnet, automatic shutoff, intermediate valve, gas equipment

Description

Automatic gas interrupting device

The present invention relates to a gas automatic shut-off device, in particular, the user to arbitrarily set the supply time of the gas supplied to the cooking gas appliance used in the kitchen, such as homes or restaurants, so that only the set time is supplied, Automatically shut off the gas supply when it elapses, and relates to an automatic gas shutoff device that can prevent accidents due to overheating.

In general, gas appliances such as gas ranges used in homes or restaurants, etc., are used to cook food by using liquefied natural gas (LNG) or liquefied petroleum gas (LPG) as fuel.

Among them, LNG is supplied from the gas supplier to the required area by a large transfer pipe buried underground and then distributed and supplied to each household through a small pipe, and LPG is purchased separately for each household. It is supplied indoors through a hose from an outdoor gas cylinder and connected to a gas appliance.

However, when the gas equipment and the gas supply pipe are directly connected, even if the gas equipment is equipped with a gas leakage blocking device, there is a high risk of explosion accident due to gas leakage due to aging or carelessness.

Accordingly, pipes and hoses for supplying gas such as LNG or LPG to indoors of each household are provided with intermediate valves for supplying and shutting off gas to gas appliances, and the user directly turns the intermediate valves before and after the use of the gas appliances. By opening and closing, gas supply and shutoff are finally performed to a gas appliance.

Therefore, the conventional gas supply structure that relies only on the intermediate valve has a number of problems, such as the need to directly operate the intermediate valve before and after the use of gas equipment.

First, after igniting gas appliances for cooking, they often do other things without waiting for the food to be cooked. In many cases, the gas equipment is left in an ignited state for a long time, and sometimes it goes out without forgetting the ignition fact of the gas equipment itself.

If the continuous heating proceeds while the gas appliance is ignited for longer than necessary, all the water filled together with the contents contained in the container is evaporated and exhausted. Eventually, the container is overheated and the dry contents ignite, leading to a fire. Occurs.

Second, even if the gas appliance is extinguished by boiling soup during cooking, the risk of leakage through the fireball of the gas appliance is not present unless the intermediate valve is closed.

Third, even if the device is locked after the use of the gas device, the intermediate valve is frequently not locked due to carelessness of the user and inexperienced operation of the elderly or children, and there is a risk of explosion accident due to gas leakage.

On the other hand, in the past, a number of safety means of various forms have been proposed to supplement the problems of the intermediate valve, but most of them are equipped with an electronic timer to automatically shut off the gas supply after a certain time after ignition. Is high and there is a great risk of malfunction, and there is a problem that there is a risk of leakage as it does not function at all, especially during a power failure.

In this regard, Korean Utility Model Registration No. 0351068 and Patent Publication No. 1999-0049142 provide safety means using a mechanical timer, and Registration Utility Model No. 0351068 discloses a spool valve for opening and closing as the spool valve moves radially through the gas pipe. Therefore, there is a high risk of leakage due to a sliding tolerance, especially a gap caused by wear in long-term use, and Patent Publication No. 1999-0049142 is operated by a combination of a timer and a plurality of permanent magnets, springs and guides, which makes the structure very complicated. There is a disadvantage that the cost increases.

The present invention was devised in view of the above-mentioned conventional problems, and it is a low-cost device having a simple structure using a mechanical timer, which supplies gas only for a set time and automatically shuts off the gas supply after the set time elapses, thereby preventing gas leakage. It is an object of the present invention to provide an automatic gas shut-off device that can prevent the risk of explosion accidents due to.

Another object of the present invention is to provide an automatic gas shut-off device that does not require external power and can block the gas at a set time even in the event of power failure, as well as leakage from the valve wear.

In order to achieve the above objects, the automatic gas shutoff device according to the present invention is provided with a valve seat formed of a ring-shaped silicone rubber having an upper surface concave in a hemispherical shape, and the valve seat is installed and a predetermined magnetic force is provided. Branch base is formed, the non-magnetic valve body protruding a plurality of spacers radially on the inner circumference; A valve ball made of a magnetic material, formed with a diameter smaller than the inner diameter of the valve body, mounted on an upper surface of the valve seat, and kept concentric with the valve body by the plurality of spacers; Permanent magnet bushing coupled to the outer periphery of the valve body to move in the center direction for the permanent magnet to open and close the valve ball consisting of a single body having an appropriate thickness and upper and lower width; A mechanical timer having a circular cam having a cam groove on its outer periphery and an operation knob for setting a time on the drive shaft, the drive shaft being reversely rotated as time passes after a predetermined time is set by forward rotation of the drive shaft; One end is pivotally connected to the permanent magnet bushing, the other end is elastically biased to be in close contact with the outer periphery of the circular cam to seesaw movement by the rotation of the circular cam to move the permanent magnet bush reciprocating movement; It provides a gas automatic shutoff device.

According to one preferred feature of the present invention, a plurality of spacers are formed radially projecting on the inner circumference of the valve body to support the valve ball to keep the valve body concentric with the valve body.

The valve seat is made of a ring-type silicone rubber in which the contact surface with the valve ball is concave in the shape of a hemispherical shape, thereby increasing the gas shutoff reliability.

In addition, the valve ball is preferably made of a permanent magnet, the valve body is made of a stainless steel pipe.

According to the present invention, the gas is supplied only by the timer for a set time, and the gas supply can be automatically cut off after the set time has elapsed. If not, the risk of explosion accident due to gas leakage can be reliably prevented.

In addition, since the gas supply is automatically interrupted by a mechanical timer, no external power source is required, so that the gas can be reliably shut off at a set time even during a power failure.

In particular, the gas is intermittently controlled by the lifting and lowering of the valve ball by the magnetic force of the permanent magnet bush.Therefore, there is no wear of the valve and there is no fear of leakage due to the valve. You can spread it.

Therefore, the present invention has an excellent effect of greatly improving the reliability and safety of the gas automatic shutoff device as well as cost reduction.

Such specific features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

1 to 4, the automatic gas shutoff device 1 according to the present invention opens and closes a valve body 10 connected to a gas pipe H in a longitudinal direction, and a flow path 10a of the valve body 10. The ball valve valve 20, the permanent magnet bushing 30 that slides on the outer circumference of the valve body 10, and the mechanical timer 40 for controlling the opening time of the valve ball 20 (" Timer ", and an operating lever 50 for reciprocating the permanent magnet bushing 30 in conjunction with the timer 40, and a case 60 incorporating the above elements.

The valve body 10 is formed of a non-magnetic pipe to prevent magnetization by the permanent magnet bushing 30, and nipples 11 for connecting the gas pipe H to both ends thereof are respectively provided. Have The nipple 11 may be joined by welding, or may be joined by screwing as shown.

The valve body 10 may be made of a high strength synthetic resin, but preferably made of stainless steel.

In the inner circumference of the valve body 10, a valve seat 12 having a diameter smaller than the valve body 10 so that the valve ball 20 can open and close the flow path 10a and seats and supports the valve ball 20. Is provided. The valve seat 12 may be composed of various kinds, but preferably, the valve seat 12 is made of silicone rubber which is excellent in various mechanical and chemical properties such as heat resistance, abrasion resistance, flame retardancy, and chemical resistance, and has appropriate elasticity and has excellent sealing force by contact.

And the upper surface of the valve seat 30 on which the valve ball 30 is mounted is preferably formed concave in the shape of a hemisphere so as to correspond to the outer shape of the valve ball 30, which is a valve ball 30 without a separate guide means This is so as to reliably block the flow path 10a by always being located at the center of the valve seat 12 by this so-called self-aligning method.

On the other hand, the valve seat 12 may be installed on the inner circumference of the valve body 10 alone, but preferably, the supporting jaw (13) is provided on the inner circumference of the valve body 10 as shown. 13) is installed on the top.

In this case, the valve seat 12 may be thinly formed in a packing form, so that the support jaw 13 is formed of a permanent magnet so that the valve ball 20 contacts the valve seat 12 more stably and strongly. In addition, the flow path 10a can be reliably shut off without the flow of the valve ball 20 even when the external impact. At this time, the permanent magnet constituting the supporting jaw 13 has a much weaker magnetic force than the magnetic force of the permanent magnet bush 30 so as not to interfere with the upward opening of the valve ball 20.

In addition, although not separately illustrated, permanent magnets such as rubber magnets may be integrally attached or inserted into the valve seat 12 regardless of whether the support jaw is installed.

Valve ball 20 is configured to have a diameter smaller than the inner diameter of the valve body 10 for the movement of the gas is placed on the valve seat 12. The valve ball 20 is composed of a ferromagnetic material so as to be able to move up and down inside the valve body 10 in accordance with the movement of the permanent magnet bush 30, preferably may be composed of a permanent magnet itself.

The permanent magnet bush 30 is slidably coupled to the outer circumference of the valve body 10 by receiving the permanent magnet 32 formed in a ring shape in a cylindrical housing (housing) 31. The permanent magnet 32 may be composed of a single body having a suitable thickness and vertical width, as shown, or may be a plurality of unit permanent magnets, although not shown.

Either way, the magnetic force formed by the permanent magnet 32 may be provided with a magnetic force of strength that can overcome the gas supply pressure and raise the valve ball 20.

Timer 40 is composed of a conventional mechanical timer having both a time-opening operation and a continuous opening operation, the circular cam 42 for driving the operating lever 50 to the drive shaft 41 and the operation knob for setting the time (knob: 43).

On the main surface of the circular cam 42, that is, the cam surface 44, a cam groove 42a for stopping the timer 40 is radially drawn in, and the operation knob 43 has a scale 43a for time setting. Marked at regular intervals along the circumferential direction. The operation knob 43 is located outside the case 60.

The actuating lever 50 is hinged to the case 60 in the middle of the body and moves on the seesaw. One end of the actuating lever 50 has a substantially U-shaped connecting fork 51 and pivotally connected to the permanent magnet bush 30, and the other end thereof is bent into an L-shape to form a timer 40. The cam surface 44 of the circular cam 42.

At this time, the end of the operating lever 50 in contact with the cam surface 44 has a roller (52) for smooth contact, and the operating lever 50 in the connecting fork 51 pivotally connected to the permanent magnet bush (30). Long hole 54 is slidingly coupled with the pivot 53 to ensure the linear movement of the permanent magnet bushing 30 according to the rotational movement of the).

The actuating lever 50 is elastically biased downwardly by the spring 55 so that the connecting fork 51 is seated on the valve seat 12 to close the flow path 10a. The roller 52 provided at the other end is positioned in the cam groove 42a of the circular cam 42 to be elastically in close contact.

Next, the operation of the automatic gas shutoff device according to the present invention configured as described above will be described with reference to FIGS. 5A and 5B.

First, the automatic gas shutoff device of the present invention is vertically connected between the intermediate valve (not shown) provided in the gas pipe (H) and the gas machine.

5A is a state in which the roller 52 of the operation lever 50 is fitted in the cam groove 42a of the circular cam 42 of the timer 40, in which case the permanent magnet bushing 30 is the valve seat of the valve body 10. (12) The valve ball 20 is placed on the valve seat 12 so as to be located in the vicinity (lower dead center of the permanent magnet bushing stroke), thereby turning off the flow path 10a.

In this state, the intermediate valve is opened and the operation knob 43 of the timer 40 is turned in the forward direction (clockwise in the figure) to set the desired time through the scale 43a. Then, the circular cam 41 which is provided together with the drive shaft 41 is rotated at the same time, so that the roller 52 of the operating lever 50 moves the cam groove 42a of the circular cam 42 as shown in FIG. 5B. By coming out of the contact with the outer circumference of the circular cam 42, the operating lever 50 is rotated clockwise about the hinge.

As such, when the operating lever 50 is rotated in the clockwise direction, the permanent magnet bush 30 connected to the other side of the operating lever 50 rises along the valve body 10. Then, the valve ball 20 is lifted by the magnetic force generated by the permanent magnet bushing 30 to be spaced apart from the valve seat 12 so as to open the flow path 10a. Passed by (10) is supplied to the subsequent gas appliances.

At this time, since the magnetic force formed by the permanent magnet bushing 30 is set larger than the supply pressure of the gas, the valve ball 20 may rise above the gas pressure along the permanent magnet bushing 30.

On the other hand, during the time set to rotate the operation knob 43 of the timer 40, the roller 52 of the operating lever 50 contacts the cam surface 44 out of the cam groove 42a of the circular cam 42, thereby causing permanent magnet bushing. 30 continuously maintains the raised state, and thus, the valve ball 20 may continuously open the flow path 10a to supply gas.

Next, the operation knob 43 and the circular cam 42 of the timer 40 rotate in reverse at the same time as the time passes after the initial time setting. Accordingly, when all the set time elapses, as shown in FIG. 5A. The roller 52 of one end of the operating lever 50 is fitted into the cam groove 42a of the circular cam 42 by the restoring elasticity of the spring 55 to be stopped.

Then, the operation lever 50 is rotated in the opposite direction (counterclockwise) as when the time is set so that the permanent magnet bushing 30 connected to the other end is lowered to the initial position, and thus the upper side of the valve seat 12 The floating valve ball 20 is lowered and placed on the valve seat 12 to shield the flow path 10a.

As such, when the valve ball 20 shields the flow path 10a, the gas supply is blocked even when the intermediate valve is opened. Therefore, even if you go out of the ignition of the gas appliance for a long time in the state of ignition of gas appliances or go out of the ignition of the gas appliances after the set time automatically shut off the gas supply to prevent accidents due to gas leakage.

In addition, even when the intermediate valve is not locked after the use of the gas appliance by the inexperienced operation of the child or the elderly or by the housewife of the user, the risk of gas leakage can be minimized, thereby contributing to the safety of gas use.

6 and 7 schematically show another embodiment of the automatic gas shutoff apparatus according to the present invention.

This embodiment is, in the configuration of the above-described embodiment, a plurality of spacers 14 which contact and support the valve ball 20 on the inner circumference of the valve body 10 to be always concentric with the valve body 10 regardless of its movement. ) Is a configuration further radially formed.

The spacer 14 may be provided over the entire length of the valve body 10 above the valve seat 12 or may be provided only at a predetermined portion in consideration of the stroke of the valve ball 20 as shown.

Embodiment of such a configuration can be located in the center of the center on the valve seat 12 is not flowing at all, even in the external impact can be surely shield the flow path (10a) in any case, Even when opening and closing the flow path (10a) according to the lifting and lowering of the permanent magnet bushing (30) ensures a very stable movement.

In particular, when the valve seat 12 is provided with permanent magnets, the valve ball 20 can reliably shield the flow path 10a at the center of the valve seat 12 even if the valve body 10 is not necessarily installed upright. To make it possible.

1 is a front view showing an automatic gas shut off device according to the present invention,

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;

3 is a front view of the timer operating knob taken along III in FIG. 2;

Figure 4 is an excerpt side view showing the connection state of the permanent magnet bushing and the operating lever of the automatic gas shut off device according to the present invention,

Figure 5a and Figure 5b is a cross-sectional view showing the operating state of the automatic gas shut off device according to the present invention,

6 is a cross-sectional view showing another embodiment of the automatic gas shut off device according to the present invention,

FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 6.

<Description of Symbols for Main Parts of Drawings>

10: valve body 10a: euro

12: Valve seat 13: Base jaw

14: spacer 20: valve ball

30: permanent magnet bushing 32: permanent magnet

40: mechanical timer 42: round cam

42a: cam groove 43: operation knob

44: cam surface 50: operating lever

H: gas pipe

Claims (5)

A valve seat is formed of a ring-shaped silicone rubber upper surface is concave in the form of a hemispherical shape, the valve seat is installed and a support jaw having a predetermined magnetic force is formed, a plurality of spacers radially protruded in the inner circumference Nonmagnetic valve bodies; A valve ball made of a magnetic material, formed with a diameter smaller than the inner diameter of the valve body, mounted on an upper surface of the valve seat, and kept concentric with the valve body by the plurality of spacers; Permanent magnet bushing coupled to the outer periphery of the valve body to move in the center direction for the permanent magnet to open and close the valve ball consisting of a single body having an appropriate thickness and upper and lower width; A mechanical timer having a circular cam having a cam groove on its outer periphery and an operation knob for setting a time on the drive shaft, the drive shaft being reversely rotated as time passes after a predetermined time is set by forward rotation of the drive shaft; An actuating lever having one end pivoted to the permanent magnet bushing and the other end elastically biased to be in close contact with the outer circumference of the circular cam to reciprocate the permanent magnet bushing by seesawing by rotation of the circular cam; Automatic gas shut off device comprising a. delete delete The method of claim 1, And the valve seat has a ring-shaped permanent magnet having a weaker magnetic force than the permanent magnet bushing on the opposite side of the contact surface of the valve ball. delete

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