JP2002039422A - Gas pressure regulator with automatic shut-off device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas pressure regulator with an automatic shut-off device capable of enforcing safety function of the whole of a gas pressure regulator in a compact structure, and driving an automatic gas shut-off device with low power. SOLUTION: In this gas pressure regulator 40 with an automatic shut-off device, the automatic shut-off device 67 is provided with a solenoid assembly 68 including a solenoid 70, a movable iron core 71, a compression spring 72, and a lever driving shaft 73 capable of abutting on the movable iron core and connected to the rear end part of a lever part 52 to move up and down. The device 67 is further provided with a pressure sensor 74 and a solenoid control system 69 including an operating switch 77, a gas flame failure detecting circuit 83, a microcomputer 75, and a solenoid operating part 76. Accordingly, a lever driving shaft 73 of the solenoid assembly 68 drives an opening and closing valve 47 with low power in response to detection signals of gas leakage, dislocation of pipes and gas flame failure generated by the pressure sensor 74 to shut off a gas flow from a nozzle outlet 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pressure regulator for stabilizing a gas supply pressure from a gas cylinder or the like to a combustor or the like, and more particularly to a gas flow in the gas pressure regulator and a gas flow regulator around the gas pressure regulator. The present invention relates to a structure of a gas pressure regulator with an automatic shut-off device capable of detecting an abnormal state and automatically switching a gas flow path to a shut-off mode.

[0002]

2. Description of the Related Art Various types of gas pressure regulators with an automatic shut-off device have been proposed in which a thermal fuse has been added to a pressure regulator of propane gas or the like as a fire prevention function, and the entire gas pressure regulator has been improved to a compact structure. I have been. For example, FIG.
As shown in FIG. 1, the conventional gas pressure regulator 10 with an automatic shutoff device includes a pressure regulator main body 11 having a pressure regulation chamber 16, a cover 12 covering an upper opening of the pressure regulation chamber 16,
The pressure regulating mechanism 27 provided inside the cover portion and a thermal fuse 37 projecting from the bottom of the pressure regulating chamber 16 were provided.

More specifically, the pressure regulator main body 11
The lever 22 pivotally supported in the pressure regulating chamber 16 located between the nozzle 13 and the gas outlet 36, which are provided with the gas inlet 14 and the nozzle outlet 15 at both ends, respectively. Valve 17 for opening and closing the valve seat of the nozzle outlet 15 through
Consisted of The on-off valve 17 is a valve body 1 made of a synthetic solid rubber material or the like which opens and closes the nozzle outlet 15 by reciprocating back and forth with respect to a valve seat of the nozzle outlet 15.
8, a piston 19 which holds the valve body at the tip and penetrates a partition wall 20 of the pressure regulating chamber 16 which intersects and serves as a guide means for reciprocating back and forth, and pivots with respect to the bottom of the pressure regulating chamber 16 The piston 19 is pivotally supported about a shaft 23, and the rear end of the piston 19 is locked to the front end of a U-shaped locking portion 24 with a pin 21 so that the rocking motion of the piston 19 is performed. And a lever portion 22 which is connected so as to be convertible into a reciprocating motion of the front and rear.

The cover 12 has a cap 2 on its upper end.
The upper end of the pressure regulation chamber 16 is covered by expanding the lower end diameter of the cylindrical portion 25 on which the cylinder 6 can be mounted, while the outer peripheral edge of the diaphragm 28 constituting a part of the gas pressure regulation mechanism 27 is removed. The other components of the gas pressure regulating mechanism 27 were housed in the pressure regulator main body 11 while being held therebetween.
The gas pressure adjusting mechanism 27 includes a spring seat 29 disposed on a surface of the diaphragm 28 on the cover portion side, a pressure adjusting plug 30 screwed to an inner surface of the cylindrical portion 25, and the spring seat 29. A pressure adjusting spring 31 mounted between the pressure adjusting plug 30 and a vertical spring extending along the axis of the pressure adjusting spring;
And the lower end is formed of the spring seat 29 and the diaphragm 2.
8 through the flange portion 3
3 is attached between an operating shaft 32 which is pressed and connected to the lever portion 22 so as to be vertically movable, and a locking portion 35 provided at an upper end of the operating shaft and the spring seat 29. And a relief spring 34 to be used.

[0005] The square hole 30a penetrated through the center of the pressure adjusting plug 30 is rotated by inserting a tool such as a wrench, and then turned into a screw with respect to the inner surface of the cylindrical portion 25 of the pressure adjusting plug 30. By adjusting the combined height, the pressure adjusting spring 31 is adjusted.
Is adjusted, and the internal space of the cover portion 12 is
The space was communicated with the atmospheric pressure system through the gap between the square hole 30a and the outer surface of the cylindrical portion 25 and the cap 26. The thermal fuse 37 is fitted into an upper end of a protrusion 40 protruding from the bottom of the pressure regulating chamber 16 toward the lever 22, and is held by a fixing member 38 that can be melted at a predetermined temperature.
The fixing member 38 wound around the body of the projection 40.
And a compression spring 39 that constantly urges the outer periphery of the head toward the lever portion 22.

The above-described conventional gas pressure regulator 10 with an automatic shut-off device is provided with the spring seat 29 of the pressure regulating spring 31 through the pressure regulating plug 30 of the gas pressure regulating mechanism 27.
Is adjusted in advance to a desired level so that the urging force is adjusted to the spring seat 29 and the diaphragm 2.
8. The piston 19 is applied to the piston 19 through the operating shaft 32 and the lever portion 22 in order, and the piston is driven backward, so that the valve body 1
Retreat 8 as much as possible. Thereafter, for example, a relatively high-pressure propane gas (hereinafter, simply referred to as a gas) from a gas cylinder or the like is supplied to the nozzle outlet 1 through the gas inlet 14.
5, the high-pressure gas is supplied to the nozzle outlet 15
From the pressure regulating chamber 16 to the gas outlet 36 through the flow path indicated by the broken line in the partition wall 20.

The gas flowing into the pressure regulating chamber 16 gradually pushes up the diaphragm 28 toward the cover portion 12 against the urging force of the pressure regulating spring 31.
The operating shaft 32 also gradually moves upward, and the upward movement of the operating shaft 32 acts to drive the valve element 18 forward through the lever portion 22 and the piston 19 in order.
The gap between the valve seat at the nozzle outlet 15 and the valve body 18 gradually decreases. Thereafter, when the pushing force of the diaphragm 28 due to the gas pressure in the pressure regulating chamber 16 and the urging force of the pressure regulating spring 31 reach an equilibrium state, the valve 1
8 completely blocks the valve seat at the nozzle outlet 15 to prevent the gas from flowing out from the nozzle outlet 15.

If the gas flows backward from the gas outlet 36 side and the gas pressure in the pressure regulating chamber 16 rises rapidly during the full-scale use of the gas, the diaphragm 28 is pushed up. Power also soars. As a result, the main part of the on-off valve 17 including the valve element 18 and the valve seat of the nozzle outlet 15 may be damaged by an impact,
The impact is absorbed by the relief spring 34 mounted between the spring seat 29 and the locking portion 35, thereby preventing the occurrence of breakage trouble.

Further, when a fire occurs during operation of the conventional gas pressure regulator with an automatic shut-off device, the internal temperature of the pressure regulator main body 11 becomes a predetermined temperature (for example, 160 ° C.).
When the temperature rises to about 200 ° C.), the fixing member 38 of the thermal fuse 37 is melted, the compression spring 39 is released from the compressed state and expanded, and the valve body 18 is pushed up by pushing up the lever portion 22. The gas pressure regulator main body 10 is provided with a gas automatic shutoff function for quickly shutting off the valve seat of the nozzle outlet 15 and preventing the gas from flowing out from the nozzle outlet 15.

[0010]

However, in the above-mentioned conventional gas pressure regulator 10 with an automatic shutoff device, the gas automatic shutoff device added to the gas pressure regulator main body has the above-mentioned thermal fuse 37 for the ambient temperature. Other security functions need to be provided with a security device separate from the gas pressure regulator body, so that the entire gas pressure regulator can be formed into a more compact structure. It was difficult.

The present invention solves the above-mentioned problems of the prior art, enhances the security function of the entire gas pressure regulator with a more compact structure, and can drive the automatic gas shutoff device with low power. It is an object of the present invention to provide a gas pressure regulator with an automatic shutoff device.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to provide a pressure regulating chamber which is located between a gas outlet and a nozzle having gas inlets and nozzle outlets at both ends, respectively. A pressure regulator main body having an on-off valve for opening and closing the nozzle outlet via a shaft-supported lever portion, and a lower end portion of a cylindrical portion capable of mounting a cap on an upper end portion, the lower end portion of which is expanded in diameter to form the pressure regulating chamber. A cover covering the upper opening, a spring seat provided on a surface of the diaphragm sandwiched between the pressure regulating chamber and the cover on the cover side, and screwed into an inner surface of the cylindrical portion; A pressure adjustment mechanism comprising: a pressure adjustment spring mounted between the pressure adjustment plug; and an operating shaft that passes through the spring seat and the diaphragm and has a lower end vertically connected to the lever portion. Automatically detects the gas flow and surrounding abnormal conditions and automatically activates the on-off valve. A gas pressure regulator with an automatic shutoff device for switching to a disconnection mode, wherein the automatic shutoff device is a solenoid, a movable iron core, a compression spring, and a lower end is an upper end of the movable iron core. A solenoid assembly having a lever drive shaft capable of contacting the upper end thereof and having an upper end vertically movably connected to a rear end of the lever portion, and a flow rate or pressure sensor disposed in the pressure regulation chamber. When,
A microcomputer that outputs a control signal based on a detection signal from the sensor and an operation signal from an operation switch;
A gas extinguishing detection circuit that outputs a gas extinguishing detection signal on the combustor side in the normal gas use mode to the microcomputer, and a solenoid operating unit that excites or demagnetizes the solenoid with an output current according to a control signal from the microcomputer. And a solenoid control system comprising: a gas pressure regulator with an automatic shut-off device.

[0013] In the gas pressure regulator with an automatic shut-off device having the above-mentioned configuration, the automatic shut-off device includes a solenoid, a movable iron core, a compression spring, and a lower end contacting an upper end of the movable iron core. A solenoid assembly having a lever drive shaft capable of being vertically movable at an upper end thereof to a rear end of the lever portion; a flow rate or pressure sensor disposed in the pressure regulation chamber; A microcomputer that outputs a control signal based on a detection signal from a sensor and an operation signal from an operation switch, a gas extinguishing detection circuit that outputs a gas extinguishing detection signal on the combustor side in a normal gas use mode to the microcomputer, and the microcomputer A solenoid control system including a solenoid operating unit that excites or demagnetizes the solenoid with an output current corresponding to a control signal from Made. Therefore, the gas extinguishing detection circuit can detect the extinguishing gas on the combustor side together with the gas leakage or the disconnection of the piping due to the flow rate or pressure sensor, and based on the detection signal and the operation signal from the operation switch, The lever drive shaft of the solenoid assembly connected to the rear end of the lever portion drives the open / close valve reliably with low power to shut off the gas flow from the nozzle outlet. Therefore, the security function of the gas pressure regulator main body can be further enhanced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the gas pressure regulator with an automatic shut-off device of the present invention will be described in detail with reference to FIGS. FIG. 1 is a longitudinal sectional view showing a state before a solenoid assembly of an embodiment of a gas pressure regulator with an automatic shut-off device of the present invention is operated. FIG. 2 is a longitudinal section showing a state where the solenoid assembly in FIG. FIG. 3 is a longitudinal sectional view showing a modification of the gas pressure regulator with an automatic shut-off device of the present invention, and FIG. 4 is a graph for explaining the operation of a gas extinguishing detection circuit in the solenoid control system of the present invention.

The gas pressure regulator 40 with an automatic shut-off device of the present embodiment comprises a pressure regulator main body 41 having a pressure regulation chamber 46,
Cover 42 for covering the upper opening of the pressure regulating chamber 46
And a gas pressure regulating mechanism 57 disposed inside the cover portion.
And an automatic shut-off device 67 for automatically switching the on-off valve 47 to the shut-off mode by detecting a gas flow and an abnormal state of the surroundings. More specifically, the pressure regulator main body 41
The lever 52 is pivotally supported in the pressure regulating chamber 46 located between the nozzle 43 and the gas outlet 66, each having a gas inlet 44 and a nozzle outlet 45 at both ends. The opening / closing valve 47 opens and closes the nozzle outlet 45 through the opening / closing valve 47.

The on-off valve 47 intersects a valve body 48 made of a synthetic solid rubber material or the like which opens and closes the nozzle outlet by reciprocating the nozzle outlet 45 with respect to a valve seat. A piston 49 is provided as guide means for reciprocating back and forth through the partition wall 50 of the pressure regulating chamber 46. A pivot 51 is pivotally supported on the bottom of the pressure regulating chamber 46 about a pivot shaft 53, and a rear end of the piston 49 is attached to a tip of a U-shaped locking portion 54 by a pin 51. And the lever portion 52 is connected so as to be able to convert the swinging motion into a reciprocating motion of the piston 49 back and forth.

The cover 42 has a cap 5 at its upper end.
The upper end of the pressure regulating chamber 46 is covered by extending the diameter of the lower end portion of the cylindrical portion 55 on which the gas pressure regulating mechanism 6 can be mounted, while the outer peripheral edge of the diaphragm 58 forming a part of the gas pressure regulating mechanism 57 is removed. The other components of the gas pressure regulating mechanism 57 are housed therein while being sandwiched together with the pressure regulator main body 41.

The gas pressure regulating mechanism 57 is provided with a spring seat 59 provided on the surface of the diaphragm 58 on the cover side.
And a pressure adjusting plug 60 screwed into the inner surface of the cylindrical portion 55.
And a pressure adjusting spring 61 mounted between the spring receiving seat 59 and the pressure adjusting plug 60. A lower end portion extends through the spring seat 59 and the diaphragm 58 so as to extend along the axis of the pressure regulating spring, and a surface of the diaphragm 58 on the pressure regulating chamber side is a flange portion 63. Of the operating shaft 62 which is urged and connected to a substantially central portion of the lever portion 52 so as to be able to move up and down, and the spring receiving seat 59 and a locking portion 65 provided at an upper end of the operating shaft 62. And a relief spring 64 mounted therebetween.

The gas pressure adjusting mechanism 57 is rotated by inserting a tool such as a wrench into a square hole 60a penetrating substantially in the center of the pressure adjusting plug 60, and then rotating the pressure adjusting plug 60 itself. The urging force of the pressure adjusting spring 61 is adjusted by adjusting the screw height of the cylindrical portion 55 with respect to the inner surface. Further, the internal space of the cover part 42 communicates with the atmospheric pressure system through a gap between the square hole 60a and the outer surface of the cylindrical part 55 and the cap 56.

The gas pressure regulator 40 with an automatic shutoff device according to the present embodiment has a configuration substantially similar to that of a conventional gas pressure regulator with an automatic shutoff device.
There is a feature. That is, the automatic shut-off device 67 of the gas pressure regulator 40 with the automatic shut-off device of the present embodiment is provided with the solenoid 70
A movable iron core 71, a compression spring 72, and a lower end that can contact an upper end of the movable iron core 71, and an upper end that can move up and down on a rear end of the lever 52. A solenoid assembly 68 having a connected lever drive shaft 73 is provided. The solenoid assembly 68 is connected to the lever 5
2 is integrally incorporated into the bottom of the pressure regulator main body 41 along the vertical axis of operation crossing the rear end.

The automatic shut-off device 67 receives a pressure sensor 74 disposed in the pressure regulation chamber 46, a detection signal from the pressure sensor and an operation signal from the operation switch 77, and controls the automatic shutdown device 67 in accordance with a stored control program. A microcomputer 75 for outputting a signal, a gas extinguishing detection circuit 83 for outputting a gas extinguishing detection signal on the combustor side in the normal gas use mode to the microcomputer 75, and an output current corresponding to a control signal from the microcomputer A solenoid control system 6 including a solenoid operating section 76 for exciting or demagnetizing the solenoid 70
9 is provided.

Next, the operation of the gas pressure regulator 40 with the automatic shut-off device of the present embodiment will be described. First, as shown in FIG. 1, the operation switch 77 of the solenoid control system 69 is closed, and a solenoid excitation command signal is transmitted from the microcomputer 75 to the solenoid operating section 76 to excite the solenoid 70, The movable iron core 71 is pulled down against the urging force of the compression spring 72. Therefore, the lower end of the lever drive shaft 73 suspended at the rear end of the lever 52 is separated from the movable iron core 71. In other words, the interference of the automatic shutoff device 67 with the gas pressure adjusting mechanism 57 is released, and the gas pressure adjusting mechanism 57 can be adjusted.

Therefore, the urging force of the pressure adjusting spring 61 against the spring seat 59 is adjusted to a desired level in advance through the pressure adjusting plug 60 in the gas pressure adjusting mechanism 57, and the operating shaft 62 and the lever are adjusted. The piston 49 is driven backward through the portion 52 sequentially. Thereby, after the valve element 48 has once retreated from the valve seat of the nozzle outlet 45 as much as possible, the operation switch 77 is opened to demagnetize the solenoid 70 and resist the urging force of the pressure regulating spring 61. The movable iron core 71 is pulled up by the urging force of the compression spring 72. Therefore, as shown in FIG.
Is brought into contact with the lower end of the lever drive shaft 73 to drive the piston 49 forward, thereby ensuring that the valve body 48 shields the valve seat of the nozzle outlet 45, Lock the operation to complete the pre-adjustment process.

Then, as a preliminary check process for gas leakage, the operation switch 77 is closed and the gas regulation is performed while supplying a relatively high-pressure gas from the gas cylinder or the like to the nozzle outlet 45 through the gas inlet 44. Pressure mechanism 5
7, the interference of the automatic shut-off device 67 is released again. As a result, the gas pressure regulating mechanism 57 is operated, and the piston 49 is driven backward through the operating shaft 62 and the lever portion 52 sequentially, so that the valve element 48 is separated from the valve seat at the nozzle outlet 45. Then, the high-pressure gas is filled from the nozzle outlet 45 into the pressure regulating chamber 46 through the flow path shown by the broken line in the partition wall 50. For example, automatically about 3 seconds after the operation switch 77 is closed, The operation switch 77 is once opened, and the inflow of the gas from the nozzle outlet 45 is completely shut off.

For a certain time after the interruption of the gas inflow described above,
For example, if a pressure drop in the pressure regulation chamber 46, that is, a gas leak is detected by the pressure sensor 74 during a lapse of 20 seconds, the open mode of the operation switch 77 is maintained and the gas inflow cutoff state is continued. Is done. If the pressure drop in the pressure regulation chamber 46 is not detected within 20 seconds after the inflow of the gas is cut off, the open mode of the operation switch 77 is automatically switched to the closed mode, and the gas leakage is prevented. The pre-check process is completed, and full-scale use of the gas becomes possible. When the gas leak is detected by the pressure sensor 74 and the inspection or repair of the gas leak is completed, the above-described gas leak preliminary check process is performed again by switching the operation switch 77 from the closed mode to the open mode. Repeat to complete.

While the gas pressure regulator 40 with the automatic shut-off device of the present embodiment is operating in accordance with a normal gas use mode, the gas is released due to a gas leak, a detachment of a rubber tube around the combustor or a step on the rubber tube. Even if a sudden drop in pressure occurs, it is automatically detected by the pressure sensor 74,
The automatic shut-off device 67 operates the shut-off control program according to the above-described gas leak pre-check process to ensure the security of the gas pressure regulator body. Note that, instead of the pressure sensor 74 of the solenoid control system 69, a flow rate sensor may be applied to detect an abnormal state from a change in the gas flow rate.

As shown in FIG. 4, the gas pressure change pattern A in the pressure regulation chamber 46 based on the normal gas burner throttle operation of the combustor is obtained when the gas burner is slightly reduced from the gas pressure P1 when the gas burner is fully opened. After the gas pressure P2 continues for a relatively long time t1 to t4, the gas pressure P3 when the gas burner is fully closed is increased for a relatively long time t4 to t5, for example, 2 to 2.
This is a case where the operation is continued for 0 second or more. Further, another gas pressure change pattern B assumes a state in which the gas burner of the combustor has disappeared by temporarily stepping on the rubber tube around the combustor. That is, the gas pressure P2 when the gas burner is slightly reduced is relatively short time t1 to t3,
For example, after being interrupted for 3 seconds, the gas pressure suddenly rises to the gas pressure P3 when the gas burner is fully closed, and the gas burns out at the gas burner. This indicates that the outflow of the gas continues.

The automatic shut-off device 67 in the gas pressure regulator 40 with an automatic shut-off device of this embodiment is
The gas extinguishing detection circuit 83 detects the gas pressure in the pressure regulating chamber 46 detected by the gas pressure change pattern 4 by the other gas pressure change pattern B based on the normal gas pressure change pattern A.
The presence or absence of a short-term gas pressure fluctuation corresponding to the gas pressure P3 when the gas burner is fully closed as described above is detected, and the detection signal is output to the microcomputer 75. That is, the gas extinguishing detection circuit 83 constituting a part of the solenoid control system 69 detects the extinguishing gas on the combustor side in the normal gas use mode, and outputs a detection signal to the microcomputer 75. Then, the shut-off control program stored in the microcomputer 75 is operated.

Further, while the gas is used in the normal gas use mode, the gas flowing into the pressure regulating chamber 46 causes the diaphragm 58 to resist the urging force of the pressure regulating spring 61. It is gradually pushed up to the cover part 42 side.
As a result, the operating shaft 62 also gradually rises, and the upward movement of the operating shaft is caused by the movement of the lever 52 and the piston 49.
, So that the valve body 48 is driven forward, so that the gap between the valve seat of the nozzle outlet 45 and the valve body 48 gradually decreases.

Eventually, the pushing force of the diaphragm 58 due to the gas pressure in the pressure regulating chamber 46 and the pressure regulating spring 6
When the urging force of 1 reaches an equilibrium state, the valve body 48 completely shields the valve seat of the nozzle outlet 45 to prevent gas from flowing out from the nozzle outlet. Further, when the gas pressure in the pressure regulation chamber 46 starts to decrease with the consumption of the gas on the combustor side, the valve element 48 starts to separate from the valve seat of the nozzle outlet 45, and the gas from the nozzle outlet 45 Spill is resumed. That is, the opening / closing operation of the valve body 48 with respect to the valve seat of the nozzle outlet 45 is repeated according to the degree of gas consumption in the combustor.

When the gas pressure in the pressure regulating chamber 46 rises sharply due to the gas flowing backward from the gas outlet side 66, the pushing force of the diaphragm 58 also rises sharply.
Since the main part of the on-off valve 47 including the valve element 48 and the valve seat of the nozzle outlet 45 may be damaged by an impact, the position between the spring receiving seat 59 and the locking portion 65 may be reduced. The relief spring 64 is attached to prevent the occurrence of the damage trouble.

Further, when a fire occurs during operation, the gas pressure regulator 40 with an automatic shut-off device of the present embodiment is configured such that the internal temperature of the pressure regulator main body 41 becomes a predetermined temperature (for example, 1).
60 ° C to 200 ° C), the thermal fuse 7
8, the fixing member 79 is melted, the compression spring 80 is released from the compressed state and expanded, and the lever portion 52 is pushed up. As a result, the valve element 48 quickly blocks the valve seat at the nozzle outlet 45 to prevent the gas from flowing out from the nozzle outlet 45. The solenoid control system 6
Instead of the pressure sensor 74 in FIG. 9, it is also possible to apply a flow sensor to detect an abnormal state from a change in the flow rate of the gas.

As shown in FIG. 3, a vibration sensor 82 is provided to the solenoid control system 69 of the automatic shut-off device 67.
The security function can be further enhanced by adding. That is, when an earthquake or the like having a seismic intensity equal to or greater than a preset seismic intensity occurs, the automatic shut-off device 67 operates the above-described shut-off control program based on a detection signal from the vibration sensor 82 to reliably ensure the security of the gas pressure regulator main body. To guarantee.

[0034]

As described above, in the gas pressure regulator with an automatic shut-off device according to the present invention, the automatic shut-off device includes a solenoid, a movable iron core, a compression spring, and a lower end located above the movable iron core. A solenoid assembly having a lever drive shaft capable of abutting against an end portion and having an upper end portion movably connected to a rear end portion of the lever portion, and a flow rate or pressure sensor disposed in the pressure regulation chamber A microcomputer that outputs a control signal based on a detection signal from the sensor and an operation signal from an operation switch, a gas extinguishing detection circuit that outputs a gas extinguishing detection signal on the combustor side in a normal gas use mode to the microcomputer, And a solenoid control system including a solenoid operating unit that excites or demagnetizes the solenoid with an output current according to a control signal from the microcomputer. That. Therefore, the gas extinguishing on the combustor side can be detected together with the gas leakage or the disconnection of the piping by the pressure or flow rate sensor, and the lever drive shaft of the solenoid assembly reliably drives the open / close valve with low power,
Block the gas flow from the nozzle outlet. Therefore, the security function of the gas pressure regulator main body can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a gas pressure regulator with an automatic shut-off device of the present invention.

FIG. 2 is a longitudinal sectional view showing an operation state of the solenoid assembly in FIG. 1;

FIG. 3 is a longitudinal sectional view showing a modification of the gas pressure regulator with an automatic shut-off device of the present invention.

FIG. 4 is a graph illustrating the operation of a gas extinguishing detection circuit of the gas pressure regulator with an automatic shut-off device of the present invention.

FIG. 5 is a longitudinal sectional view showing a conventional gas pressure regulator with an automatic shutoff device.

[Explanation of symbols]

 40 Gas pressure regulator with automatic shutoff device of the present invention 41 Pressure regulator main body 42 Cover 47 Open / close valve 57 Gas pressure regulating mechanism 67 Automatic shutoff device 68 Solenoid assembly 69 Solenoid control system 70 Solenoid 71 Movable iron core 72 Compression spring 73 Lever drive shaft 74 Pressure sensor 75 Microcomputer 76 Solenoid operating part 77 Operation switch 78 Thermal fuse 82 Vibration sensor 83 Gas extinguishing detection circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H061 AA05 BB04 CC12 CC18 DD03 EA31 EA45 EB05 EC21 GG05 GG12 3H106 DA07 DA09 DA12 DA23 DB02 DB12 DB23 DB32 DC02 DD12 EE34 EE45 HH08 KK13 KK15 5H316 AA11 BB05 DD01 EE01 EE05 JJ13 KK02 KK04 KK05 LL05

Claims (1)

[Claims] 1. A nozzle outlet having a gas inlet and a nozzle outlet disposed at both ends thereof, and a nozzle outlet via a lever portion pivotally supported in a pressure regulating chamber located between the nozzle outlet and the gas outlet. A pressure regulator main body having an on-off valve for opening and closing the pressure regulator; a cover portion for expanding an upper end portion of the pressure regulation chamber by expanding a lower end portion of a cylindrical portion capable of mounting a cap on an upper end portion; A pressure regulator mounted between a spring seat provided on a surface of the diaphragm sandwiched between the pressure chamber and the cover portion on the cover portion side and a pressure regulating plug screwed into the inner surface of the cylindrical portion. A pressure regulating mechanism including a spring, an operating shaft that penetrates the spring seat and the diaphragm, and whose lower end is vertically movably connected to the lever portion; and detects an abnormal state of gas flow and surroundings. And an automatic shut-off device for automatically switching the on-off valve to a shut-off mode. A gas pressure regulator with an automatic shut-off device comprising: a solenoid, a movable iron core, a compression spring, and a lower end that can contact an upper end of the movable iron core, and an upper end of the movable iron core. A solenoid assembly having a lever drive shaft whose section is vertically movably connected to the rear end of the lever section; a flow rate or pressure sensor disposed in the pressure regulation chamber; and a detection signal and operation by the sensor. A microcomputer that outputs a control signal according to an operation signal from a switch, a gas extinguishing detection circuit that outputs a gas extinguishing detection signal on the combustor side in a normal gas use mode to the microcomputer, and a control signal from the microcomputer. And a solenoid operating system for energizing or demagnetizing the solenoid with the output current. With automatic shut-off device the gas pressure regulator that.