JP2652920B2 - Gas governor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas governor attached to a gas appliance for adjusting the pressure of fuel gas.

[0002]

2. Description of the Related Art A gas governor operates with a small pressure difference in a housing and a small pressure difference between a housing and a back pressure side. When the flow of the air fluctuates, the governor valve may vibrate to generate noise called governor noise. In particular, when the vent hole of the back pressure chamber cannot be increased due to the regulation of the destination, governor noise is likely to occur.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to prevent the governor from sounding.

[0004]

A first means for solving the above-mentioned problems is as follows: a diaphragm for dividing a gas flow path side and a back pressure side in a housing; a valve seat provided in the middle of the gas flow path; In a gas governor comprising a governor valve connected to a diaphragm by a valve stem to open and close the valve seat, an anti-vibration weight having a small play gap in a direction of movement between the diaphragm and the governor valve is provided. Features. The second means is characterized in that a cushion rubber is provided on at least one of the opposing surfaces of the diaphragm, governor valve or vibration-proof weight in the first means.

[0005]

In the first means, the vibration-isolating weight has a floating gap between the diaphragm and the governor valve.
Vibrates slightly after the vibration and collides with the governor valve and the diaphragm to attenuate the vibration. Also, the second
In the means, the shock at the time of collision of the anti-vibration weight is cushioned by the cushion rubber to prevent the generation of new noise.

[0006]

An embodiment will be described below with reference to the drawings. In FIG. 1, 1 is a gas governor, 2 is an electromagnetic valve connected downstream thereof, and a housing 3 of the gas governor 1 is composed of a housing main body 4 and a back pressure chamber 5, and the housing main body 4 is connected to a primary side 7 by a valve seat 6. And the secondary side 8. A diaphragm 9 is interposed between the housing main body 4 and the back pressure chamber 5 and fixed with screws 10.

The governor valve 11 that opens and closes the valve seat 6 is fixed by caulking to the lower surface of the enlarged diameter portion 12a below the valve stem 12, and the center of the diaphragm 9 is placed on the enlarged diameter portion 12b above the valve stem 12. It is supported and is pressed and fixed by a washer and a nut 14 via a center plate 9a and a spring 13.

A pipe-shaped anti-vibration weight 15 made of metal, resin, or the like is loosely fitted to both of the enlarged diameter portions 12a and 12b, and a ring-shaped cushion rubber 16 is placed on the governor valve 11. And receives the lower end of the anti-vibration weight 15.
The length of the anti-vibration weight 15 is a length in which a floating gap 17 is formed between the upper end thereof and the diaphragm 9, and the size of the floating gap 17 varies depending on the type and capacity of the governor valve 11. , The flow rate is 4-5 l / mi in the format shown
n, effective diameter 34 of diaphragm 9 and governor valve 11
mm is 0.3 to 0.5 mm.

A spring 18 for pressing the diaphragm 9 from above is accommodated in the back pressure chamber 5, and the upper end of the spring 18 can be adjusted by an adjusting screw 20 through a seat 19. I have. Also, on the side wall of the back pressure chamber 5,
Vent hole 21 communicating with the atmosphere (0.3 mm in diameter in the illustrated form)
5 mm).

The solenoid valve 2 includes a valve seat 23 and a valve body 25 operated by a solenoid 24, and opens and closes a passage 26 leading to a gas appliance. A passage 28 leading to another gas appliance is provided in the bottom 27 of the housing 3.

In the gas governor 1, when vibration occurs due to the opening and closing of the electromagnetic valve 2, the governor valve 11 may move violently up and down due to inertia and repeatedly hit the valve seat 6 to generate governor noise. 9 is also moved via the valve stem 12 and likewise moves up and down.
2A, when the governor valve 11 rises in the direction of arrow A, the anti-vibration weight 15 also rises in the direction of arrow B. FIG.
When the governor valve 11 collides with the valve seat 6 in (b), the governor valve 11 stops, but the anti-vibration weight 15 still rises due to the inertial force in the arrow B direction. Even if the governor valve 11 starts to descend in the direction of arrow A ′ due to the repulsive force due to the collision with the valve seat 6 and the repulsive force of the spring 18, the vibration-proof weight 15 is
The inertia force keeps rising, and as shown in FIG. 2 (c), collides with the lower surface of the descending diaphragm 9 and causes the governor valve 11 to move.
Attenuates the downward movement and receives downward kinetic energy.

Next, when the governor valve 11 attempts to ascend again, the anti-vibration weight 15 has a downward inertial force, so that it collides with the governor valve 11 to attenuate the ascending force and the state shown in FIG. Then, the above-described anti-vibration action is repeated to instantaneously prevent vibration, thereby preventing occurrence of governor noise. During this operation, the anti-vibration rubber 16 is
Can reduce the collision sound, and can also absorb vibrations to promote the vibration damping action.

In a conventional gas governor, governor noise sometimes occurs at a supply pressure of 200 mm or more in a water column in a natural gas specification. In particular, when the diameter of the vent hole 21 of the back pressure chamber 5 is reduced, governor noise is likely to occur. Even when the anti-vibration weight 15 was merely added to this, even when the supply pressure exceeded 200 mm and became 350 mm, governor noise did not occur.
Therefore, a normal natural gas supply pressure of 100 to 300 m
No governor noise occurred over the entire range of m.

In the above embodiment, the cushion rubber 16 is not always necessary, but may be provided on the vibration-proof weight 15 side or on the collision surface of the diaphragm 9 with the vibration-proof weight 15 in addition to the illustrated position. Good. In the above embodiment, the pressure on the primary side 7 of the fuel gas acts on the diaphragm 9, but the pressure on the secondary side 8 passing through the gap between the valve seat 6 and the governor valve 11 is applied to the diaphragm 9. The structure can work, and the same effect can be obtained with this structure. Further, the vibration-proof weight 15 is not limited to one,
More than one may be provided in an overlapping manner.

[0015]

As described above, according to the present invention, the vibration of the governor valve can be suppressed to prevent the governor from rumbling, so that the gas appliance can be used quietly. In addition, since governor noise can be prevented by a structure in which only a vibration-proof weight with a play gap is interposed between the governor valve of the conventional gas governor and the diaphragm, it can be configured at extremely low cost and has a quick response to demand. It has certain advantages.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

2 (a), 2 (b) and 2 (c) are explanatory diagrams of the operation.

[Explanation of symbols]

3 Housing 5 Back pressure chamber 6
Valve seat 7 Primary side 8 Secondary side 9
Diaphragm 11 Governor valve 12 Valve stem 15
Anti-vibration weight 16 Rubber cushion 17 Idling gap

Claims (2)

(57) [Claims] 1. A diaphragm for partitioning a gas flow path side and a back pressure side in a housing, a valve seat provided in the middle of the gas flow path, and a governor valve connected to the diaphragm with a valve stem to open and close the valve seat. A gas governor comprising: a gas governor, wherein a vibration-proof weight having a small idle gap in the direction of movement thereof is interposed between the diaphragm and the governor valve. 2. The gas governor according to claim 1, wherein a cushion rubber is provided on at least one of the opposing surfaces of the diaphragm, the governor valve, or the vibration isolating weight.