KR200185649Y1 - A device for opening and shutting valve in gas automatic interception apparatus - Google Patents

Abstract

The present invention relates to a valve opening and closing device of a gas vehicle circuit breaker mounted on a gas supply pipe to open and close the intermediate valve according to an external input signal and to detect the gas leakage and automatically shut off the intermediate valve. A cylindrical rotating body having two inclined protrusions alternately in contact with both sides and inclined in opposite directions so as to cross each other partitioned by the two inclined protrusions, the inclined surface slidingly contacting the tip of the protrusion of the handle; Or a motor that selectively rotates by a predetermined angle in the reverse direction, and a manual handle that is connected by the rotor and the gear train and is elastically biased in the closing direction of the intermediate valve. The present invention can be rotated while pressing the handle of the intermediate valve, it is possible to start the intermediate valve operating motor under no load, it is possible to reliably operate the intermediate valve even with a small capacity motor.

Description

{A device for opening and shutting valve in gas automatic interception apparatus}

The present invention relates to a gas circuit breaker, and more particularly to a valve opening and closing device for automatically opening or closing the intermediate valve provided on the gas supply pipe in accordance with a signal from the control unit.

In general, gas appliances such as gas ranges, gas burners, or gas boilers used in homes or businesses use liquefied natural gas (LNG) or liquefied petroleum gas (LPG) as fuel to cook food or perform heating. LNG from these gases is supplied from the gas supplier to the required area by a large transfer pipe buried underground, and then distributed to each household through a small pipe to connect to the gas equipment, and LPG is purchased separately for each household. It is supplied indoors through a hose from the gas cylinder provided outdoors and is connected to the gas equipment.

On the other hand, gas supply pipes such as pipes and hoses that supply gas such as LNG or LPG to indoors of each household are provided with intermediate valves for supplying and blocking gas to and from the gas equipment. Since the user selectively opens and closes whenever necessary, there are many concerns about the occurrence of gas leakage accidents due to carelessness of the user. In other words, although gas appliances are usually equipped with safety devices to prevent gas leakage, it is difficult to expect the effects of gas leakage from parts damaged by aging or impact due to long-term use, and thus, forgetfulness, etc. If the intermediate valve is not locked due to the carelessness of the user and the inexperienced operation of the elderly or children, the risk of explosion accident due to gas leakage will exist. In addition, there was a risk of gas leakage through the crater if the flame was turned off by boiling soup during cooking.

In order to solve such a problem, Korean Patent Laid-Open Publication No. 99-76260 provides a so-called gas shutoff device that automatically shuts off the supply of gas by locking an intermediate valve of a gas supply pipe when gas is leaked. When the gas sensor detects the leaked gas, the controller operates the alarm buzzer and locks the intermediate valve on the gas supply pipe by rotating the socket coupled to the intermediate valve with a synchro motor. It is equipped with a manual handle connected to the socket by a gear train so that the intermediate valve can be operated at the time.

However, since the gas shut-off device is simply fitted by fitting the handle of the socket and the intermediate valve, when the gas supply pipe is mounted on the gas supply pipe, the gas shutoff device is bound to be fixed while the intermediate valve is pressed. There is a problem that must be provided with a large-capacity motor more than necessary due to the jam start failure. In other words, the intermediate valve is a primary safety device, and the rotation of the handle is regulated by the elasticity of the spring. When opening, the intermediate valve can be rotated only while the handle is pressed. Therefore, when the device is first installed, the position of the middle valve should be fixed while the handle of the middle valve is pressed. Therefore, the elastic restoring force of the middle valve handle always acts on the synchromotor. In order to improve this problem, there is no choice but to adopt a larger capacity motor than necessary. In addition, since the handle of the intermediate valve is always pressed and the primary safety device is released, there are also safety problems.

The present invention was completed in view of the problems of the conventional gas shut-off device described above, and can be rotated while pressing the intermediate valve on the gas supply pipe so that the intermediate valve can be locked by the safety device. Its purpose is to provide a valve opening and closing device.

Another object of the present invention is to provide a valve opening and closing device for a gas circuit breaker capable of using a small-capacity motor by starting the intermediate valve operating motor under no load and of preventing starting of the motor when the intermediate valve is opened. will be.

1 is a cross-sectional view showing a gas circuit breaker having a valve opening and closing device according to the present invention,

Figure 2 is an exploded perspective view showing an extract of the valve opening and closing device of Figure 1,

3A and 3B and FIGS. 4A to 4E are main and side views illustrating the operation of the present invention in sequence.

<Explanation of symbols for main parts of drawing>

V: middle valve (of gas supply line) H: handle (of middle valve)

10: valve opening and closing device 11: rotor

13, 14: protrusions (of the rotor) 15, 16: slope (of the rotor)

17: gear part (of the rotating body) 18: motor

19: Manual handle 21: (Manual handle) gear

In order to achieve the above objects, the present invention is equipped with a gas supply pipe to open and close the intermediate valve in accordance with an external input signal and at the same time detect the gas leakage when the intermediate valve is automatically cut off the intermediate valve. An apparatus for opening and closing, comprising: two locking protrusions alternately contacting both sides of the protrusions of the intermediate valve handle, and inclined in opposite directions so as to cross each other divided by the two locking protrusions, and having an inclined surface slidingly contacting the tip of the protrusion of the handle. A rotating body; A motor for selectively rotating the rotating body by a predetermined angle in the forward or reverse direction; It is connected by the rotor and the gear train, the manual handle is elastically biased in the closing direction of the intermediate valve; characterized in that consisting of.

According to one preferred feature of the present invention, the rotating body is formed in a cylindrical shape, the outer periphery of the gear portion to be engaged with the gear train is provided integrally.

Accordingly, the present invention can be rotated while pressing the handle of the intermediate valve, it is possible to start the intermediate valve operation motor under no load, thereby exhibiting the effect of improving the reliability and ease of use of the gas circuit breaker.

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.

In Fig. 1, the gas shut-off is provided with a circuit board 4 having a power supply and a control part on one side of the body 1 having a coupling hole 2, and an intermediate valve provided on the gas supply pipe P on the other side. A valve opening and closing device 10 for opening and closing V is provided, which are protected by a cover 3 which is coupled to the body 1. In addition, a gas sensor 5 for detecting leakage gas and an alarm buzzer 6 for emitting an alarm sound when gas leaks are provided at one side of the outer surface of the body 1 and connected to the circuit board 4. Such a gas circuit breaker includes a fixing means such as a clamp 8 on the outer surface of the body 1 and is mounted to the gas supply pipe P.

On the other hand, the valve opening and closing device 10, as shown in Figure 2, in accordance with the characteristics of the present invention, the rotating body 11 for rotating the handle H of the intermediate valve (V) in the forward and reverse directions, and And a motor 18 for selectively driving the rotating body 11 in the forward or reverse direction by a predetermined angle, and a manual handle 19 for manually operating the rotating body 11 at the time of power failure or when necessary.

The rotating body 11 is comprised in the cylindrical shape which has the transmission shaft 12 at one end for connecting with the motor 18 so that rotation is possible. The other end of the rotating body 11 is formed on the center line so that the two engaging projections (13) and (14) which are in contact with both sides of the projection (T) of the intermediate valve (V) handle (H) are opposed to each other. Both surfaces partitioned by the locking projections 13 and 14 are formed as arcuate inclined surfaces 15 and 16 that are inclined in opposite directions so as to cross each other as viewed from the side as shown in FIG. The inclined surfaces 15 and 16 are in sliding contact with the tip of the protrusion T of the handle H of the intermediate valve V to press the handle H, and the inclination angle is It is set in consideration of the range in which the handle H moves in the axial direction. And the outer periphery of the rotating body 11 is provided with a gear unit 17 for connecting the rotating body 11 and the gear 21 of the manual handle 19 to be described later to be electrically coupled.

Here, the handle (H) of the intermediate valve (V) is configured in various forms according to the type of the intermediate valve (V), if necessary, provided with a separate adapter 23, the shape and length of the handle (H) The back can be adjusted to suit the rotating body 11.

The motor 18 is provided in the circuit board 4 and is selectively driven in a forward or reverse direction according to a signal of a controller driven according to an external input signal, and the rotation angle range is about 270 °.

The manual handle 19 is installed to be exposed to the outside of the cover 3, and is supported by the body 1 by a support shaft 20 extending from the rear side. The support shaft 20 of the manual handle 19 is provided with a gear 21, and is electrically connected to the gear unit 17 of the rotating body 11 through the connecting gear 22. In addition, the support shaft 20 of the manual handle 19 moves the manual handle 19 to the closing direction of the intermediate valve V so that the handle H of the intermediate valve V, which was opened at the time of power failure, may be automatically returned. The return spring 24 for elastic biasing is coupled.

The remaining reference numeral 7 is a display unit for setting and displaying the opening time of the intermediate valve V and the like by the timer of the controller, and H and L are upper and lower ends of the inclined surfaces 15 and 16 of the rotating body 11.

Next, the operation of the gas shut-off valve opening and closing device 10 according to the present invention configured as described above will be described in parallel with FIG.

First, Figure 4a is a state in which the gas shut-off is turned off (OFF), the intermediate valve (V) is closed, the two locking projections 13, 14 of the rotor 11 is the intermediate valve (V) handle (H) The protrusions (T) of both sides of the sides are in contact with one another. At this time, the handle (H) of the intermediate valve (V) is elastically biased in the regulating direction by the spring (not shown), the rotation is locked, as shown in Figure 3a the projection (T) is rotated It is located at the lower end of the two inclined surfaces 15 and 16 of the whole 11.

In this state, when the power source of the gas circuit breaker is turned ON and automatically selected, the motor 18 is driven in the forward direction to rotate the rotor 11 clockwise as shown in FIG. 4B. At this time, since the elastic force by the handle (H) of the intermediate valve (V) does not act at all on the rotating body 11 of the present invention, the motor 18 can be started stably under no load state, according to the conventional motor In addition, the malfunction of the starter 18 can be effectively prevented, and the intermediate valve V can be reliably operated even by the small-capacity motor 18.

Then, the tip of the projection T of the handle H is in sliding contact with the inclined surfaces 15 and 16 of the rotating body 11 and pressed in the axial direction as shown in FIG. Groups 13 and 14 are in contact with the other end of both sides of the projection (T). Accordingly, as shown in FIG. 4C, the handle H of the intermediate valve V is rotated clockwise along the rotating body 11 through the protrusion T to open the intermediate valve V. FIG.

Next, when the setting time by the timer or the like ends in this state, the motor 18 is driven in the reverse direction by the signal of the controller. Then, as shown in FIG. 4D, the rotating body 11 is rotated counterclockwise so that the two engaging protrusions 13 and 14 alternately contact the opposite ends of both sides of the protrusion T of the handle H, and then continue. By rotating the motor 18, as shown in FIG. 4E, the handle H of the intermediate valve V is rotated in the reverse direction to shut off the gas supply by locking the intermediate valve V. FIG.

On the other hand, if a power failure occurs in the state in which the intermediate valve V is open, the manual spring 19 is returned to the closed position by restoring elasticity in the return spring 24, thereby automatically locking the intermediate valve V. That is it. That is, when the rotor 11 is rotated by the motor 18 to open the intermediate valve V, the manual handle 19 connected to the rotor 11 by the gears 17, 22, 21 is When the return spring 24 is compressed and rotated at the same time, a large elasticity is applied to the manual handle 19 in the closing direction. When a power failure occurs in this state, the restraining force by the motor 18 is released. ) Is returned to the initial position by the restoring elasticity of the return spring 24, so that the rotating body 11 is rotated in the reverse direction by the gears 21, 22, and 17 so that the handle ( H) will be locked.

In addition, when the intermediate valve (V) is already in the blackout state or wants to operate manually, the manual handle 19 is rotated forward or reverse in the state of manually switching or turning off the power. Then, the rotating body 11 is rotated in a required direction by the gear part 17 engaged with the gear 21 of the manual handle 19 through the connecting gear 22, so that the intermediate valve ( V) can be opened and closed easily.

As described above, according to the present invention, since the breaker is mounted on the gas supply pipe without pressing the handle of the intermediate valve, it can be rotated while pressing the handle of the intermediate valve during operation, so that the intermediate valve operating motor can be started under no load. Accordingly, it is possible to prevent the starting failure due to the overload as in the prior art as well as to reliably operate the intermediate valve even with a small capacity motor.

Therefore, the present invention has the effect of improving the reliability and ease of use of the gas circuit breaker.

Claims (2)

A device for opening and closing the intermediate valve in the gas circuit breaker mounted on the gas supply pipe to open and close the intermediate valve in accordance with an external input signal and at the same time detect the gas leakage and automatically shut off the intermediate valve, A rotating body having two inclined protrusions alternately contacting both sides of the protrusions of the intermediate valve handle, and inclined in opposite directions so as to intersect with both sides partitioned by the two locking protrusions, the inclined surface slidingly contacting the tip of the protrusion of the handle; A motor selectively rotating the rotating body by a predetermined angle in a forward or reverse direction; And a manual handle which is connected by the rotor and the gear train and is elastically biased in the closing direction of the intermediate valve. The gas opening and closing device of claim 1, wherein the rotating body is formed in a cylindrical shape, and a gear part engaged with the gear train is integrally formed on an outer circumference thereof.