KR100347458B1 - Gas cock device - Google Patents

Abstract

(Task) When the operation shaft supported by the gas cock body is rotated, the cam plunger moves in the axial direction in conjunction with the rotation of the operation shaft, and the rod arranged in the axial direction moves in the axial direction in conjunction with the operation of the cam plunger. For the gas cock device which is pressed by the rod and the safety valve is opened, it is possible to provide fine adjustment of the gas supply amount at the minimum tightening state.

(Solution means) The gas supply amount adjusting needle valve B which adjusts the amount of passing gas by the distance between the needle valve body 6 and the valve seat 5b which can move forward and backward with respect to the valve seat 5b formed in the gas passage 50. To the gas cock body 1, the cam 8 rotating in conjunction with the operation shaft 13 is rotatably attached to the gas cock main body 1, and a cam surface 8b extending spirally to the cam 8 is formed. When the cam 8 rotates while engaging the bar 6b of the valve body 6, the needle valve body 6 moves back and forth so that the gas supply amount is adjusted.

Description

Gas cock device {GAS COCK DEVICE}

The present invention relates to a gas cock apparatus for use in gas appliances such as gas tables.

Conventionally, as a gas cock of this kind, when the operation shaft is rotated around the axis by an operation knob, the rod arranged in the axial direction in conjunction with this moves in the axial direction to press open the safety valve or the main valve, There is a case in which the closed rotor rotating in conjunction with the shaft adjusts the gas supply amount to the burner by changing the opening area of the gas outlet by sliding the slide along the opening end surface of the gas outlet (see Japanese Patent Application No. Hei 9-248434). . In such a gas cock apparatus, when the operation knob is rotated while the main valve is opened, the gas supply amount is adjusted by rotating the closure to change the opening area of the gas outlet. In case of extinguishing, the operation knob is continuously rotated in the direction of decreasing the opening area. In this way, the opening of the gas outlet port is completely closed by the closure, and the main valve is closed to turn off the fire.

By the way, in the above-described configuration, when the operation knob is excessively rotated when adjusting the gas supply amount to the minimum tightening state, the opening area becomes too small and the light may be turned off. There was a problem that it is difficult to finely control the gas supply amount in. In addition, since the outer periphery of the closure is rotatably slide-contacted to the gas cock body or the like, it becomes difficult to rotate during long use, so that it is difficult to finely adjust the gas supply amount.

An object of the present invention is to provide a gas cock device in which the gas supply amount in the minimum tightening state is easily adjusted.

1 is a cross-sectional view showing a gas cock device of the valve closed state to which the present invention is applied

2 is an exploded view showing the main components of the gas cock device;

3 is a cross-sectional view showing a gas cock in the rotation termination state

4 is a cross-sectional view showing a gas cock in a valve open state;

Explanation of symbols for main parts of the drawings

1: gas cock body 2: rod

5: needle body 5b: valve seat

6: needle valve body 6b: bar

8: Cam (rotating body) 8b: Cam surface

9: cam guide 10: base plate

11: plunger 13: operating shaft

50: gas passage B: needle valve

According to the present invention for solving the above-mentioned problems, when the operation shaft axially supported by the gas cock body is rotated, the cam plunger in the gas cock body moves in the axial direction in conjunction with the rotation of the operation shaft, and simultaneously with the operation of the cam plunger. A gas cock device in which a rod arranged in an axial direction moves in an axial direction, and a safety valve, which is pressed by the rod and closes a gas passage, is opened, the needle valve body and the valve capable of moving forward and backward with respect to the valve seat formed in the gas passage. Attached to the gas cock main body, a gas supply amount adjusting needle valve for adjusting the amount of passing gas by the distance from the seat, rotatably attached to the gas cock body, and a cam surface extending spirally to the rotating body And the needle valve body is engaged with the needle valve body. When the rotating body rotates, the needle valve body moves forward and backward and the gas supply amount Characterized in that the section.

In the conventional apparatus, since the closure is made to rotate in conjunction with the operation shaft, when the closure reaches the position of the minimum tightening state, only the operation shaft cannot be continuously rotated with the closure closed. However, in the present invention, since only the operation shaft can be rotated while the needle valve is stopped in the minimum tightening state by forming the cam surface in an appropriate shape, a phenomenon such as the fire extinguishing by excessively tightening the needle valve when reducing the gas supply amount Can be prevented. Therefore, the fine adjustment of the gas supply amount in the minimum tightening state becomes easy. In addition, since the needle valve moves forward and backward without rotation, the slide surface becomes hard to be in one-sided contact, thereby ensuring smooth slide movement.

Further, when the cam plunger is engaged in a state of rotating in conjunction with the operation shaft, and the rotor is engaged in a state of rotating in conjunction with the cam plunger, the rotating body engaged with the cam plunger is rotated in the cam plunger. The first movement of the cam plunger which rotates in conjunction with the operation shaft is stabilized by preventing the first movement.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing.

In Fig. 1, reference numeral 1 denotes a gas cock body formed of an aluminum die cast or the like, a hollow portion 1a formed therein, a gas inlet 1b for introducing gas into the hollow portion 1a, and a hollow portion. The gas outlet 1c which flows out a gas to the burner which is not shown in the part 1a is provided. The hollow part 1a is equipped with the rod 2 which is arrange | positioned in the left-right direction in FIG. 1, and is movable in this left-right direction, and the electronic safety valve 3 attached to the right end side in the hollow part 1a. As shown in FIG. 1, when the safety valve 3 is closed, gas does not flow downstream of the safety valve 3, but when the rod 2 moves to the right and presses the safety valve 3 to open it, the gas flows downstream. Will flow. The main valve 2a is provided in the middle of the rod 2, and the rod 2 is supported to the left by a spring 4 interposed between the main valve 2a and the valve seat member 3a. As shown in FIG. 1, in the closed state in which the main valve 2a is pressed against the valve seat 1d, gas does not flow downstream of the main valve 2a, but the main valve 2a is moved by moving the rod 2 to the right. ) Is open, the gas flows downstream.

The needle body 5 is attached to the gas cock main body 1 as shown in FIG. In the needle body 5, a gas passage 50 communicating with the gas outlet 1c of the gas cock body 1, and a through hole 51 arranged in a left-right direction communicating with the gas passage 50 are formed. . The needle valve body 6, which will be described later, is inserted into the through hole 51 at the open portion 51a side of the left end, and the gas supplied from the gas outlet 1c to the needle body 5 passes through the gas passage 50. The gas outlet 5a formed at the right end of the needle body 5 is fed to a burner (not shown).

The needle body 5 is provided with a needle valve B. Needle valve (B) is composed of a valve seat (5b) as a tightening portion formed in the middle of the gas through hole 50, and the needle valve body (6) capable of moving forward and backward with respect to the valve seat (5b), the valve seat (5b) The amount of gas passing through the needle valve body 6 is adjusted. The needle valve body 6 is inserted into the through hole 51 so as to be movable in the horizontal direction along the through hole 51, and is supported by the spring 7 to the right. When the needle valve 6 is pressed against the valve seat 5b and the needle valve B is closed, the gas having the minimum flow rate determined by the orifice passage 6c is downstream of the needle valve body 6. The amount of gas supplied to the burner is regulated by flowing through the outlet 5a and removing the needle valve body 6 from the valve seat 5b to adjust the opening degree of the valve. The needle valve body 6 is also equipped with a sealing O-ring 6a.

In this way, the state in which the needle valve B is closed is at the minimum tightening state, and thus, such an operation as extinguishing the fire by preventing the over tightening of the needle valve body as in the prior art is prevented, and the amount of gas supply at the minimum tightening state is minute. It is easy to adjust. Moreover, since the gas supply amount in the minimum tightening state can be set in accordance with the size of the diameter of the orifice 6c, the gas supply amount in the minimum tightening state becomes stable. In addition, since the needle valve 6 moves forwards and backwards, it is easy to ensure smooth operation in the hermetic state.

The hollow portion 1a of the gas cock body 1 is equipped with a cam 8 and a cam guide 9, which are substantially cylindrical rotary bodies inserted from the open side formed at the left end of the gas cock body 1. It is. The cam guide 9 is pressed against the end 1e in the hollow portion 1a by the base plate 10 attached to the left end of the gas cock body 1. Moreover, the projection 9a is formed in the circumferential side of the cam guide 9, and is engaged with the recessed groove 1f formed in the inner surface of the hollow part 1a. Thus, the cam guide 9 is fixed to the gas cock body 1.

The cam 8 is accommodated in the gas cock body 1 in a rotatable state in which the movement in the horizontal direction is restricted by the cam guide 9. On the outer periphery of the cam 8, a pair of grooves 8a extending in the axial direction, that is, the left and right directions are formed. The cam plunger 11 which has a pair of convex part 11a which engages with the said groove 8a in the outer periphery is inserted in the cylinder of the cam 8. Therefore, when the cam plunger 11 rotates, the cam 8 rotates in conjunction with this. In addition, the cam plunger 11 is movable to the left-right direction with respect to the cam 8. The right end of the cam plunger 11 is closed, and when it moves to the right, the rod 2 is pushed to the right. In addition, the right side of the cam 8 is provided with a waveform-shaped pressing ring 12. Even if the cam plunger 11 moves to the right side, the cam 8 does not move to the right side. In addition, the pressing ring 12 gives a rotational resistance to the cam 8, and can adjust the rotational resistance by changing the shape of the pressing ring 12, etc., so that the rotational operability of the operation handle can be appropriately adjusted.

The cam plunger 11 is fitted with a movable shaft 13 having the left and right directions in the axial direction so as to be movable. The operation shaft 13 is axially supported by the base plate 10 and a substantially U-shaped guide plate 14 attached to the gas cock body 1 on the left side thereof, and a flange 13a is formed in the middle thereof. Between the flange 13a and the base plate 10, the cam plate 15 provided with two fan-shaped parts which turn on / off switches, such as a discharge switch which is not shown in figure, is attached so that rotation is not possible. A spring 16 is interposed between the cam plate 15 and the base plate 10, and the spring 16 holds the operation shaft 13 and the cam plate 15 to the left. The projection part 13b is formed in the left side surface of the flange 13a. The protrusion 13b is engaged with the notch 14a of the guide plate 14 in the valve closing state shown in FIG. 1 to prevent rotation of the operating shaft 13. The operating shaft 13 is rotatable when pressed to the right while resisting the holding force of the spring 16 as shown in FIG. 3. In addition, an operation knob 17 is attached to the operation shaft 13.

The right end of the operation shaft 13 is formed with a groove 13c extending in the radial direction. The pin 18 is fitted in this groove 13c in the crossing state, and when the operation shaft 113 is rotated, the pin 18 rotates in association with this. The pin 18 is engaged with the groove cam 9b formed in the cylindrical portion of the cam guide 9 and the engaging groove 100 of the cam plunger 11. The home cam 9b is formed in the spiral direction of the left screw. Therefore, when the operation shaft 113 is rotated left L (refer FIG. 2), the pin 18 is moved to the right by the home cam 9b while rotating left. The engaging groove 100 has a wide width portion 101 serving as an open side (left side of the drawing) and a narrow width narrow portion serving as a bottom side (right side of the drawing) ( 102 and an inclined surface 103 therebetween, and when the operation shaft 13 is rotated left (L) and the pin 18 is rotated, the rotating pin 18 is an appropriate portion of the engagement groove 100. By pressing, the cam plunger 11 moves to the right while rotating in conjunction.

Moreover, on the outer periphery of the cam 8, the cam surface 8b is formed in the helical direction of a left screw. This cam surface 8b is engaged with the bar 6b attached to the outer peripheral surface of the needle valve body 6. As shown in FIG. Therefore, when the cam 8 rotates to the left L, the bar 6b is pushed to the left while being in sliding contact with the cam surface 8b, whereby the needle valve body 6 resists the holding force of the spring 7 to the left. Go to. Moreover, when the cam 8 turns to the right, the needle valve body 6 will move to the right side by the holding force of the spring 7, with the bar 6b and the cam surface 8b slidingly contacting. As a result, the needle valve body 6 moves forward and backward with respect to the valve seat 5b in the gas passage 50 in association with the rotation of the cam 8, and the opening degree of the valve determined according to the interval with the valve seat 5b. The gas supply amount is controlled by adjusting. In addition, by changing the shape of the cam surface 8b, the ratio of the opening degree of the needle valve body 6 to the gas supply amount and the rotation angle of the operating shaft 13 when the needle valve body 6 is fully opened is determined. It can be set easily.

The operation of the gas cock device having such a configuration will be described.

In the ignition operation for starting the burner, first, the projection 13b of the operation shaft 13, which is fitted to the notch 14a of the guide plate 14 by pressing the operation knob 17 in the valve closing state shown in FIG. ), The operation shaft 13 is rotated. Subsequently, when the operation knob 11 is turned left (L) (refer to FIG. 2) with respect to the gas cock device, the operation shaft 13 and the pin 18 rotate left. The pin 18 moves to the right along the home cam 9b of the cam guide 9 while turning left. At this time, the pin 18 abuts on both sides of the light emitting portion 101 and the inclined surface 103 in the engagement groove 100 to move the cam plunger 11 to the right while turning left, and in conjunction with this, the cam (8) Turn left.

When the operation shaft 13 is rotated to the end position of rotation shown in Fig. 3, the rod 2 is pushed to the right by the cam plunger 11 moved to the right, and the main valve 2a is completely opened. Further, the safety valve 3 is opened by being pushed by the rod 2, and the cam surface 8b of the cam 8 which is turned left presses the bar 6b of the needle valve body 6 to the left and the needle valve body 6 ) Is completely opened, the amount of gas corresponding to the 'strong' thermal power is supplied to the burner through the gas passage (50).

In addition, the cam plate 15 is rotated so that a discharge switch (not shown) is turned on, and the burner is ignited to heat a non-illustrated thermocouple disposed near the burner. Until the safety valve 3 is kept open by the thermoelectric power generated by the thermocouple, the rotational force of the left rotation is continuously applied to the operation shaft 13 by the operation knob 17.

When the rotational force of the left turn is released after the safety valve 3 is kept open, the projection 13b of the operation shaft 13 comes into contact with the guide plate 14 as shown in FIG. It will be in the valve open state shown in FIG. In this state, since the projection part 13b does not coincide with the notch part 14a, the operation shaft 13 is maintained in a rotatable state, and the main valve 2a is kept open. Further, the cam plunger 11 is pushed back to the left by the rod 2 so that the pin 18 is engaged with the width narrow portion 102 of the engagement groove 100. When the operation knob 17 is rotated in this state, the operation shaft 13, the pin 18, the cam plunger 11, and the cam 8 rotate, and the cam surface 8b of the needle valve body 6 is rotated. The bar 6b is moved left and right to adjust the opening degree of the valve of the needle valve body 6.

If the operating shaft 13 continues to turn right in the state shown in FIG. 4, the needle valve body 6 is pushed to the right by the spring 7 so that the opening degree of the valve is gradually decreased, and the valve seat 5b is pressed against the valve seat 5b. It is closed. This closed state is the minimum tightening state and gas of the minimum flow rate is supplied to the burner. By the way, since the cam surface 8b is engaged only in the direction which moves the bar 6b of the needle valve body 6 to the left side, only the operation shaft 13 in the state which stopped operation | movement of the needle valve body 6 was carried out. You can turn right further. Here, if only the operation shaft 13 is rotated right in the above state, the projection 13b of the operation shaft 13 will eventually coincide with the notch 14a. In this way, the operation shaft 13 is pushed back to the left by the spring 16, the projection 13b is fitted into the notch 14a, and the operation shaft 13 moves to the position shown in FIG. When 2a is in close contact with the valve seat 1d and closed, the gas supply to the burner is stopped and the burner is extinguished. When the burner is extinguished, the thermoelectric power generated in the thermocouple is reduced so that the safety valve 3 cannot be kept open, so the valve is closed and the entire gas cock device is returned to the valve closed state shown in FIG.

As mentioned above, according to this invention, setting adjustment of a gas supply amount can be made easy.

Claims (2)

Rotating the operating shaft axially supported by the gas cock main body causes the cam plunger in the gas cock main body to move in the axial direction in conjunction with the rotation of the operating shaft and simultaneously moves the rod arranged in the axial direction in conjunction with the operation of the cam plunger. In the gas cock device that the safety valve that was pressed by the rod and closed the gas passage is opened, A needle valve for adjusting the gas supply amount is attached to the valve seat formed in the gas passage so as to adjust the amount of gas passing through the gap between the needle valve body and the valve seat. A rotatable body that rotates in conjunction with the operating shaft is rotatably attached to the gas cock body, and a cam surface extending spirally is formed on the rotatable body to be engaged with the needle valve body. And a needle valve body moves forward and backward when the rotating body rotates so that the gas supply amount is adjusted. The method according to claim 1, The cam plunger is engaged in a state of rotating in conjunction with the operating shaft, the rotor is engaged in a state of rotating in conjunction with the cam plunger, characterized in that the gas cock device