JPH0413587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for suppressing vibrations in gas control valves such as gas governors and proportional control valves.

(Prior art and problems) In gas control valves such as gas governors and proportional control valves, their constituent elements such as the body, diaphragm, valve body, adjustment spring, moving coil, and moving magnet vibrate. Since it is configured as a system, when certain conditions of gas pressure and flow rate are met, it resonates and vibrates at its natural frequency. If the above-mentioned pressure and flow conditions at the time of resonance are within the normal use range, resonance will occur during normal use, becoming a source of noise and shortening the lifespan of components. There are inconveniences such as causing problems and making control difficult.

It is difficult to theoretically design and manufacture individual control valves in advance so that such resonance will not occur during normal use, and to prevent such resonance from occurring, it is difficult to This requires trial and error, requires a great deal of effort, time, and cost, and it is also difficult to take countermeasures when it occurs.

The present invention aims to solve the above problems.

(Means for Solving the Problems) The structure of the present invention will be explained with reference to FIGS. 1, a diaphragm 4 that partitions a valve chamber 2 and a control chamber 3, a valve body 5 is provided on the valve chamber 2 side, and an adjustment spring 7 is provided between an adjustment screw 6 and an adjustment screw 6 on the control chamber 3 side. In A, a vibration absorbing member 8 is interposed at a suitable position between the diaphragm 4 and the adjusting screw 6.

Next, the mechanism described in item 2 includes a diaphragm 4 that partitions the device body 1 into a valve chamber 2 and a control chamber 3, a valve body 5 is provided on the valve chamber 2 side, and a moving coil 9 is provided on the control chamber 3 side. In the gas control valve B, a vibration absorbing member 8 is interposed at a suitable position between the diaphragm 4 and the moving coil 9.

Next, the mechanism described in item 3 includes a diaphragm 4 that partitions the device body 1 into a valve chamber 2 and a control chamber 3, a valve body 5 is provided on the valve chamber 2 side, and a moving magnet 10 is provided on the control chamber 3 side. A vibration absorbing member 8 is interposed at an appropriate position between the diaphragm 4 and the moving magnet 10 in the gas control valve C provided with the above.

(Actions and Examples) The operation of the mechanism of the present invention will be explained with reference to examples.

First, the gas control valve A moves the valve body 5 by the movement of the diaphragm 4 according to the supply pressure of gas introduced from the gas inlet 11, and changes the gap with the valve seat 12 to adjust the flow rate and pressure. This is a gas governor that supplies gas at a constant pressure from the gas outlet 13, and the gas supply pressure from the gas outlet 13 is changed by an adjusting screw 6 via an adjusting spring 7.

Therefore, in a state where the vibration absorbing member 8 is not interposed, the vibration system including the diaphragm 4, the valve body 5, and the adjustment spring 7 is able to adjust the pressure and flow rate of a certain gas within the normal operating range of the gas equipment being used. In the case of resonance and vibration, if a vibration absorbing member 8 is interposed between the diaphragm 4 and the adjusting screw 6, a part or most of the vibration energy will be absorbed by the vibration absorbing member 8.
can be absorbed and suppress vibrations. The vibration absorbing member 8 can be made of rubber, a dart pot, or the like, and the vibration absorbing member 8 may be connected in parallel to the adjustment spring 7 instead of being connected in series with the adjustment spring 7 as shown in the illustrated example.

Next, the gas control valve B applies a control current to the moving coil 9 to cause it to move relative to the permanent magnet 14 on the body 1 side, and thus moves the valve body 5 to change the gap between it and the valve seat 12. Then, the flow rate and pressure are adjusted and the gas is supplied from the gas outlet 13.

Even in such a configuration, if the vibration system including the diaphragm 4, valve body 5, and moving coil 9 resonates and vibrates at a certain gas pressure or flow rate within the normal usage range of the gas equipment in use. for,
Vibration can be suppressed by interposing a vibration absorbing member 8 between the moving coil 9 and the diaphragm 4 to absorb a part or most of the vibration energy.

Next, the gas control valve C applies a control current to the coil 15 on the side of the vessel body 1 to move the moving magnet 10, and thus moves the valve body 5 to change the gap between the valve seat 12 and the flow rate. The pressure is adjusted and the gas is supplied from the gas outlet 13.

Even in such a configuration, the vibration system including the diaphragm 4, the valve body 5, and the moving magnet 10 resonates and vibrates at a certain gas pressure and flow rate within the normal usage range of the gas appliance. In this case, the moving coil 9 and the diaphragm 4
Vibrations can be suppressed by interposing a vibration absorbing member 8 between them to absorb part or most of the vibration energy.

In the embodiments shown in FIGS. 2 and 3, the reference numeral 1
Reference numerals 6 and 17 are an outer cylinder and an inner cylinder, respectively, for interposing the vibration absorbing member 8, and the structure for interposing the vibration absorbing member 8 is appropriate.

(Effects of the Invention) As described above, the present invention provides a gas control valve such as a gas governor or a proportional control valve with a diaphragm, a valve body,
Even if the vibration system, which includes components such as adjustment springs, moving coils, and moving magnets, resonates and vibrates at certain gas pressures and flow rates within the normal operating range of the gas equipment being used, Vibration can be easily controlled by interposing a vibration absorbing member to absorb part or most of the vibration energy, thereby suppressing noise, preventing shortening of component life, and enabling good control. effective.

[Brief explanation of drawings]

1 to 3 are schematic explanatory diagrams showing embodiments of the configuration of the present invention. Code, 1... Instrument body, 2... Valve chamber, 3... Adjustment chamber, 4... Diaphragm, 5... Valve body, 6... Adjustment screw, 7... Adjustment spring, 8... Vibration absorbing member, 9 ...Moving coil, 10...Moving magnet, 11...Gas inlet, 12...Valve seat, 13...Gas outlet, 14...Permanent magnet, 15
...Coil, 16...Outer cylinder, 17...Inner cylinder.

Claims (1)

[Scope of Claims] 1. A gas control valve in which a diaphragm that partitions a device body into a valve chamber and a control chamber is provided with a valve body on the side of the valve chamber, and an adjustment spring is provided between the control chamber and an adjustment screw. A vibration suppressing mechanism for a gas regulating valve, characterized in that a vibration absorbing member is interposed at a suitable position between the diaphragm and the regulating screw. 2. In a gas control valve in which a valve body is provided on the valve chamber side of a diaphragm that partitions the device body into a valve chamber and a control chamber, and a moving coil is provided on the control chamber side, a A vibration suppression mechanism for a gas control valve, characterized by interposing a vibration absorption member. 3. In a gas control valve in which a valve body is provided on the valve chamber side of a diaphragm that partitions the device body into a valve chamber and a control chamber, and a moving magnet is provided on the control chamber side, there is a gap between the diaphragm and the moving magnet. A vibration suppressing mechanism for a gas control valve, characterized in that a vibration absorbing member is interposed at an appropriate position.