JPH07208632A - Method and device for controlling gas supply device - Google Patents

Abstract

PURPOSE:To avoid rapid pressure charge 'during valve open by delaying the opening of the second open/closed valve for a preset time after the first open/ closed valve is open when the first and second open/closed valves are open. CONSTITUTION:When AC voltage is supplied to input terminals 42, 43, a DC current is obtained with a rectifying circuit bridge-connected to diodes D1, D2, D3, D4. A current is therefore carried into output terminals 44, 45 connected to the first electromagnetic valve unit 1 with power input to the input terminals 42, 43, so that a valve is driven to open a valve seat. With a current flow in a delay circuit M, charge is performed at a time constant determined by a resistance R3 and a capacitor C2. As a current is carried into the terminal 47 with a delay, the second electromagnetic valve unit 2 is open with a delay. In this way, malfunction such as rapid pressure rise on the secondary side which occurs when two open/closed valves formed with a governor held therebetween are open is properly avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply device in which a plurality of valves for controlling gas supply are integrated, and more particularly to a governor on an input port side (hereinafter referred to as a primary side) and an output port side (hereinafter referred to as a primary side). (Referred to as the secondary side), and a control method of a gas supply device that opens each on-off valve with a time difference.

[0002]

2. Description of the Related Art Conventionally, when supplying gas to a burner or the like in a factory or the like, a gas supply device having a solenoid valve on the primary side and the secondary side on which the gas flows out across a governor has been used. . The gas supply device usually requires two gas valves in this way. This is because it is stipulated in the occupational safety regulations, etc., so that the gas is surely shut off. by the way,
In such a gas supply device, gas is supplied by opening a solenoid valve, and the governor keeps the gas pressure constant and supplies the gas to the burner. As such a gas supply device, one using a governor having the structure described below is used.

First, a gas supply apparatus having a normally closed type governor having a complicated structure will be described.
FIG. 5 is a sectional view showing a normally closed type governor (electric control system) having a complicated structure as an example. Here, the solenoid valves on the primary side and the secondary side are omitted. In this governor, a diaphragm 76 is provided in the upper surface opening on the primary side C so as to close the opening. A governor valve body 72 having a permanent magnet 71 is provided with the permanent magnet 71 on the upper side and a diaphragm 76 interposed therebetween.
At this time, the governor valve body 72 is arranged so as to come into contact with the valve seat 79 that opens the primary side C and the secondary side D from below. On the other hand, a valve seat 79 and a body 77 forming a fluid path.
A yoke 75 is formed on the upper side, and a fixed iron core 73 is arranged in the inner center of the yoke 75 at a position close to the upper portion of the permanent magnet 71. The fixed iron core 73 is wound with an electromagnetic coil 74 that generates a magnetic force in a direction that repels the permanent magnet 71.

The normally closed type governor having such a structure operates as follows. The governor valve body 72 closes the valve seat 79 at all times when electricity is not applied by the diaphragm 76 that urges in the valve closing direction. Then, the electromagnetic coil 74
The electromagnetic repulsive force is controlled by controlling the current applied to the governor valve body 72 to move it up and down against the elastic force of the diaphragm 76. Depending on the position of the governor valve body 72 that moves up and down,
The flow rate of gas from the primary side C to the secondary side D is adjusted. Further, due to the balance between the fluid pressure acting on the diaphragm 76 as an elastic body and the electromagnetic repulsive force, the governor valve body 57 is moved up and down with respect to the fluctuation of the gas pressure corresponding to the temporal fluctuation of the gas flowing into the primary side C. By doing so, the gas pressure on the secondary side D is kept constant.

However, in the governor having such a structure, the electromagnetic coil for controlling the valve opening position of the governor valve body, the adjusting means for adjusting the current applied to the electromagnetic coil, and the like are necessary. And the structure becomes complicated. If the number of parts is large in this way, not only is it troublesome to repair the device when it breaks down, but also costs are required for the repair, and the cost of the device itself is also high. A normally closed type governor having a self-powered (mechanical) structure is more complicated than an electrically controlled type governor. Therefore, in general, a gas supply device using a normally open type governor as described below is used.

FIG. 6 is a sectional view showing a normally open type governor having a simple structure. Here, the one provided with the solenoid valves on the primary side and the secondary side will be shown and described. The governor unit 53 is provided with a hollow governor pig 55 protruding from the center of the upper surface of the governor holder 54, and an adjusting screw 56 that moves up and down is provided inside thereof. Also,
An insertion hole 54a for advancing and retracting the governor valve body 57 is formed in the center of the lower surface of the governor holder 54, and the governor valve body 57 is mounted from below by a mounting tip portion 57a at the upper end. That is, the governor valve body 57 is supported in a state in which the mounting tip portion 57a thereof penetrates the diaphragm 59 sandwiched by the pressure receiving trays 58a and 58b. Further, a spring tray 60 is further provided on the pressure tray 58a, and the mounting tip portion 57a of the governor valve body 57 is stopped by a split pin 61 at the center. Then, the cylindrical spring 62 engaged between the spring tray 60 and the governor adjusting screw 56 is attached to the diaphragm 59.
And the governor valve body 57 supported by the diaphragm 59
Is urged downward.

The gas supply device provided with the governor having such a structure operates as follows when supplying gas. First, when the gas is supplied, the solenoid valves 51 and 52 are simultaneously opened, and the gas flows from the primary side E, flows from the first chamber 65a through the governor to the second chamber 65b, and flows out from the secondary side F. At this time, the gas supplied to the main body 63 causes a temporal change in the flow rate of the supplied gas. Therefore, the first chamber 65a
Also, the pressure of V fluctuates with the temporal fluctuation of its flow rate.

However, the diaphragm 59 has the first chamber 65a.
Up and down under the influence of the pressure fluctuation of the diaphragm 5
The governor valve body 57 also moves up and down as the 9 moves up and down. That is, if the pressure in the first chamber 65a rises due to the difference in pressure receiving area between the diaphragm and the governor valve body, the governor valve body 57 is lifted against the spring force of the cylindrical spring 62. Then, the gap between the governor valve body 57 and the valve seat 64 is narrowed, and the gas flowing into the second chamber 65b is restricted. On the other hand, when the pressure in the first chamber 65a decreases, the pressure of the gas in the governor holder 54 also decreases, so the cylindrical spring 6
The governor valve element 57 is pushed down by the spring force of 2.
Therefore, the gap between the governor valve body 57 and the valve seat 64 is opened, and the second
The gas easily flows into the chamber 65b. Therefore, the primary side E
The governor valve body 57 is moved up and down in response to the fluctuation of the gas pressure corresponding to the temporal fluctuation of the gas flowing into the chamber to reduce the pressure fluctuation of the primary side E, and as a result, the gas pressure of the secondary side F. Is kept constant.

[0009]

In the normally open type governor having such a simple structure, when the gas is continuously supplied, the pressure fluctuation is alleviated to discharge the gas as described above. You can However, when the supply of gas is started, that is, when the electromagnetic valve 51 on the primary side E is opened, the electromagnetic valve 52 on the secondary side F is also simultaneously opened.
The gas suddenly flows in, greatly reducing the pressure on the primary side E. Therefore, the gas does not flow from the gas passage (not shown) provided on the gas supply side of the solenoid valve 51 to the pilot valve side (not shown), which causes misfire of the pilot burner. Moreover, the pressure of the secondary side F momentarily increases due to the gas that flows in abruptly, which causes overshoot, resulting in increased ignition difficulty and ignition noise.

Here, the pressure of the gas on the primary side E and the secondary side F by the gas supply device using the normal open type governor will be confirmed using a time chart. Figure 7
(A) is a diagram showing the time chart, in which the vertical axis represents pressure and the horizontal axis represents time. The pressure on the primary side E is measured near the fluid inlet part, and the pressure on the secondary side F is measured near the fluid discharge part. The pressure on the primary side E is 2
00mmH to ₂ O, the pressure in the secondary side F is the governor to be 90MmH ₂ O is adjusted.

However, when both solenoid valves are closed, the pressure on the primary side E is as high as 300 mmH ₂ O and the pressure on the secondary side F is 0, whereas the gas at the moment of opening is primary. It flows from side E to secondary side F all at once. Then, depending on the type of the source pressure supply circuit, the pressure on the primary side E may momentarily drop significantly below the supply pressure, and the pressure on the secondary side F may also momentarily rise due to the flowing gas. Immediately after that, as the pressure on the primary side E drops sharply, the pressure on the secondary side F also falls significantly below the set pressure. After that, it converges to the set value and stabilizes. As described above, depending on the source pressure supply circuit, a normally open type governor is used, and the rapid gas flow at the time of valve opening increases the pilot burner misfire or ignition difficulty or ignition noise due to overshoot. May cause results.

Therefore, in order to solve such a problem, the present invention is constituted by a normally open type governor having a simple structure with a small number of parts, and regardless of the type of the source pressure supply circuit. An object of the present invention is to provide a gas supply device capable of appropriately avoiding the inconvenience that occurs when the valve is opened.

[0013]

A method of controlling a gas supply apparatus according to the present invention comprises a normally open type governor for keeping a gas pressure constant, and a first on-off valve having an output port connected to an input port of the governor. And a second opening / closing valve having an input port connected to an output port of the governor, the method comprising: controlling the first opening / closing valve when opening the first opening / closing valve and the second opening / closing valve. After opening, the opening of the second on-off valve is delayed for a predetermined time. Further, the control device of the gas supply device of the present invention includes a normally open type governor for making gas pressure constant, a first opening / closing valve whose output port is connected to an input port of the governor, and an output port of the governor. In a control device of a gas supply device having a second opening / closing valve connected to an input port, when opening the first opening / closing valve and the second opening / closing valve, after opening the first opening / closing valve, a predetermined time (2) It has a control means for delaying the opening of the on-off valve.

[0014]

In the method of controlling the gas supply device according to the present invention, when the gas is supplied, only the first opening / closing valve is opened while the second opening / closing valve is kept closed. Then, on the secondary side, the second on-off valve shuts off the gas, so the pressure remains 0, while on the primary side, the gas flows by opening the first on-off valve, but does not flow suddenly and the pressure is constant. Keep on. Here, by opening the first opening / closing valve, gas flows into the governor to apply pressure to the bellows. On the other hand, pressure is applied to the governor valve element as well, but the governor valve element moves in the closing direction due to the difference in pressure receiving area between the two. Then, when the governor valve body moves in the closing direction thereafter, the second opening / closing valve is opened. If the second on-off valve is opened in such a state, the governor will be in a state close to a closed state like a normally closed type, so that the gas supplied to the primary side does not flow to the secondary side all at once. Also, the pressure on the secondary side does not rise sharply.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas supply device embodying the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a gas supply device of this embodiment, and FIG. 2 is a view showing its cross section. This is a diagram in which the solenoid valve units 1 and 2 used as the on-off valves and the normally open type governor unit 3 having a simple structure are attached to the main body. FIG. 2 shows a state in which both the solenoid valves 1 and 2 on the primary side and the secondary side are closed and the governor is opened. Further, these are directed from the primary side A that supplies gas toward the secondary side B that discharges gas,
The first solenoid valve unit 1, the governor unit 3, and the second solenoid valve unit 2 are configured in this order. These structures will be described below with reference to FIG.

First, the structure of the first and second solenoid valve units 1 and 2 used in this embodiment will be described. here,
Since the solenoid valve units 1 and 2 have the same structure, only the first solenoid valve unit (hereinafter, simply referred to as a solenoid valve unit) 1 will be described. Solenoid valve unit 1
At the center of the solenoid on the upper side, there is a coil 6 in which a copper wire is wound around the body of a hollow cylindrical coil bobbin 5 having flanges at both ends. The outer circumference of the coil 6 is resin-molded. A guide pipe 8 is fitted on the inner circumference of the coil bobbin 5, and the guide pipe 8
Inside, the movable iron core 9 is fitted and held so as to be vertically movable. On the other hand, the fixed iron core 10 is fixed at the upper end of the guide pipe 8.

Further, a magnetic frame is formed by the metal plate 11 on the outer circumference of the upper solenoid portion. An electromagnetic valve holder 12 is provided on the outer periphery of the movable core 9 so as to support the lower side of the metal plate 11 below the upper solenoid portion. The electromagnetic valve holder 12 is provided with a screw hole (not shown) penetrating the holder. On the other hand, a valve body 13 is attached to the tip of the movable iron core 9, and a spring 14 is fitted between the valve body 13 and the solenoid valve holder 12.

Next, the structure of the governor unit 3 will be described. The governor unit 3 is a normally open type. The governor 3 is divided into an upper part and a lower part, a governor holder 15 is formed in the lower part, and a screw hole (not shown) is provided through the governor holder 15. And
A valve body guide 17 is formed which has an inclined surface toward the center lower part and in which a governor valve body 18 advances and retreats.
An upper hollow governor pig 16 is provided on the governor holder 15, and a governor cap 19 is attached to the upper end of the governor pig 16. Furthermore, governor pig 1
An adjusting screw 24 is provided to move the hollow inner peripheral surface of 6 up and down. On the other hand, in the center of the governor holder 15,
Attaching the governor valve body 18 to the valve body guide 17 Tip 18a
However, it is installed inside the governor from below. In other words, the governor valve body 18 is supported in a state in which the mounting tip portion 18 a of the governor valve body 18 penetrates both the pressure receiving plate 22 and the bellows 21 integrated with the spring receiving plate 20.

Next, the solenoid valve units 1 and 2 described above
The main body 33 to which the governor unit 3 is attached will be described. FIG. 3 is a sectional perspective view of a main body to which the solenoid valve units 1 and 2 and the governor unit 3 are attached. The main body has a box shape and a gas passage is formed.
As shown in FIG. 2, companion flanges 31 and 32 having cylindrical holes are provided at both ends in the longitudinal direction. The flange 31 serves as the primary side A and the flange 32 serves as the secondary side B. And the main body 33
The upper and lower surfaces are open, and the lower surface can be opened and closed by the lower plate 38. Further, the inside of the main body 33 is partitioned by three partition plates 34a, 34b, 34c, and the solenoid valve unit 1, the governor unit 3 and the solenoid valve unit 2 are sequentially mounted in each of the partitioned spaces.

The partition plates 34a, 34b, 34c are provided with inclined walls as shown in the figure, and are provided so as to block the flow of gas. Furthermore, the partition board 3
4a, 34b, 34c have a valve seat 3 having a circular through hole.
5a, 35b, 35c are formed. Then, the flanges 31 and 32 are fitted so as to sandwich the main body 33 to form a main body. At that time, a strainer 36 is built in between the flange 31 and the main body 33, and an orifice plate 37 is fitted between the main body 33 and the flange 32. Further, the solenoid valve units 1 and 2 and the holders 12 and 15 of the governor unit 3 are fitted into the upper opening 39 of the main body 33. Then, the main body 33 is screwed through the screw holes of the holders 12 and 15.

Further, in the solenoid valve units 1 and 2 and the governor unit 3, the valve bodies 13 of the solenoid valve units 1 and 2 and the governor valve body 18 of the governor unit 3 have valve seats 35a and 35a.
The first chamber 39a and the second chamber 39a are mounted so as to close the b and 35c.
Create chamber 39b. At this time, the valve bodies 13 of the solenoid valve units 1 and 2 are provided so as to close the valve seats 35a and 35c from above. On the other hand, the governor valve body 18 of the governor unit 3 is provided so as to close the valve seat 35b from below.
That is, the solenoid valve units 1 and 2 are mounted as they are from the top of the main body 33. However, the governor unit 3 first removes the governor valve body 18 from the governor unit 3 and mounts it on the upper part of the main body 33, then removes the lower plate 38 of the main body 33 and passes the governor valve body 18 from below, and again mounts it on the governor unit 3. Install.

The drive unit of the gas supply device is formed by the above-described structure. Then, as shown in FIG. 1, a control means 41 for driving and controlling the valve bodies 13 of the first and second electromagnetic valve units 1 and 2 is provided. The control means 41 has a first
And output terminals 44 and 45 on the second solenoid valve units 1 and 2.
And 46, 47 are connected to each other, and the input terminals 42, 43 are further connected to an AC power supply (not shown). The control means 41 is composed of a circuit including a delay circuit M as shown in FIG.

Next, the operation of the gas supply system of this embodiment having the above construction will be described. The movable iron core 9 is biased downward by the spring 14, and the valve body 13 is in contact with the partition plate 34a. Then, when a current flows through the coil 6, a magnetic field is generated in the vertical direction of the fixed iron core 10, and the fixed iron core 10 becomes an electromagnet to attract the movable iron core 9. Since this attraction force is stronger than the spring force of the spring 14, the movable iron core 9 moves to the fixed iron core 10 side. As a result, the valve body 13 is separated from the valve seat 35a and the valve is opened.

Therefore, by such an operation, the solenoid valve units 1 and 2 open and close the valve seats 35a and 35c by the predetermined vertical movement of the valve body 13. Therefore, the flange 3
The gas supplied from No. 1 passes through the first chamber 39a and the second chamber 39b in the main body 33 and can be supplied to a burner (not shown) mounted on the flange 32. On the other hand, governor unit 3
Moves the adjusting screw 24 up and down to increase or decrease the spring force applied to the pressure receiving plate 22 via the cylindrical spring 25. The spring force applied to the pressure receiving plate 22 is
Is a force that opposes the gas pressure of the first chamber 39a. Therefore, by adjusting the adjusting screw 24, the pressure of the supply gas accompanied by pulsation can be made constant and supplied to the second chamber 39b, and the gas pressure in the second chamber 39b can be set.

The first and second solenoid valve units 1 and 2 which open due to such an operation are controlled by the control means 41 shown in FIG. 4 when supplying gas. That is, when an AC voltage is applied to the input terminals 42 and 43, the diodes (denoted by the symbol "D") D1, D2, D3, D4
A DC current is obtained by a rectifier circuit in which a bridge is connected. Therefore, when the power is input to the input terminals 42 and 43, the output terminals 44, which are connected to the first solenoid valve unit 1,
An electric current flows through 45 to drive the valve element 13 to open the valve seat 35a. At that time, no current flows to the second solenoid valve unit 2 because the output terminal 47 is not conducting.

A delay circuit M causes a time difference to the terminal 47. That is, due to the current flowing through the delay circuit M, the resistance R
C2 is charged with a time constant determined by 3 and a capacitor (indicated by the symbol "C") C2. Therefore, when the potential of C2 reaches the constant voltage of the Zener diode ZD1, C
2 supplies a discharge current to the gate of the thyristor T. Then, the thyristor T is turned on and a current flows to the terminal 47.
Therefore, since the time constant at this time is about 1.5 seconds, the current flows to the terminal 47 with a delay of about 1.5 seconds, so that the second solenoid valve unit 2 opens with a delay of about 1.5 seconds. Become.

The pressure change when the valve is opened and closed by the control means 41 will be described with reference to the time chart of FIG. 7B. At this time, the pressure on the primary side A is measured near the fluid inlet portion, and the pressure on the secondary side B is measured near the fluid discharge portion. The pressure on the primary side A is 200 mmH.
_The governor is adjusted so that the pressure of ₂ O is 90 mmH ₂ O on the secondary side B. Therefore, first, the first electromagnetic valve unit 1 is excited to open the valve seat 35a, and the second electromagnetic valve unit 2 remains in the state where the valve seat 35c is closed. When the gas supplied to the main body 33 flows into the first chamber 39a, it flows into the second chamber 39b because the governor 3 has the normally open structure.

However, since the valve seat 35c is closed by the second solenoid valve unit 2, the opening of the valve body 13 of the first solenoid valve unit 1 does not cause the gas to suddenly flow into the main body 33. At this time, the pressure on the primary side A is 3 before opening the valve.
The secondary side B is kept at 0 while maintaining 00 mmH ₂ O. After that, during the 1.5 seconds in which the valve seat 35c is opened by the second solenoid valve unit 2, the gas that has entered through the gap between the governor valve body 18 and the valve body guide 17 exerts pressure in the direction of pushing up the bellofram 21. Therefore, belofram 21 in the governor
Since the pressure applied to the valve is higher than the pressure applied to the pressure receiving surface of the governor valve body 18, a difference also occurs in the vertical movement of the governor valve body 18, and the governor valve body 18 moves in a direction to close the upper valve seat 35b. It will be.

As described above, when the second solenoid valve unit 2 is opened with a delay, the governor valve element 18 is driven in the direction to be closed for a moment, so that the gas on the primary side A suddenly flows into the second chamber 39b side. Does not mean On the other hand, on the secondary side B, the second
The gas in the chamber 39b suddenly flows out and the pressure rises momentarily. Then, the pressure on the secondary side B becomes low, and the governor valve body 18 moves downward due to the inflow of gas from the primary side A,
After the gas vigorously flows into the second chamber 39b where the pressure is lowered to reduce the pressure on the primary side, both the pressures on the primary side A and the secondary side B change to set values and then stabilize.

The above-mentioned pressure fluctuation caused by the control of the electromagnetic valve will be compared with the conventional simultaneous valve opening based on the time chart of FIG. Then, it can be seen that the conventional one has a large difference in the fluctuation value of the pressure on both the primary side and the secondary side, whereas the difference in the present embodiment has a small difference. In particular, when the valve is opened, the pressure on the secondary side is about 1.5 times the set value (150 mmH
Had jumped up to ₂ O) is equal to or less than the set value (75mmH ₂ O in half). Further, in the conventional device, a rapid change is repeated within 0.1 seconds to converge to the set value, but in the present embodiment, the set value is stabilized over a time period twice that, and the frequency of pressure fluctuations is increased. You can see that there are few.

As described in detail above, according to the gas supply apparatus of the present embodiment, even if the gas supply apparatus uses a normally open type governor having a simple structure with a small number of parts, the primary Since the opening of the solenoid valves on the side A and the side B is shifted for a predetermined time, it is difficult to ignite or ignite the ignition due to the rapid pressure change on the primary side and the secondary side due to the characteristics of the present embodiment by the above comparison. It has become possible to prevent an increase in Further, by using a normally open type governor having a small number of constituent parts and a simple structure, it is possible to easily perform repair in the event of a failure, and the cost thereof can be reduced. On the other hand, by installing the delay circuit unit that shifts the opening time of the solenoid valve,
By simple attachment or detachment, it has become possible to provide a gas supply device in which the solenoid valves on the primary side A and the secondary side B are opened simultaneously or with a delay.

The control of the gas supply device of the present invention is not limited to that of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, although the solenoid valve is used as the on-off valve in the above embodiment, a pressure valve may be used for this. Also, for example, in the above-described embodiment, the solenoid valve on the secondary side B is opened about 1.5 seconds after the solenoid valve on the primary side A is opened. You may make it possible to adjust in steps.

[0033]

As described above, according to the control method of the gas supply device of the present invention, when the first on-off valve and the second on-off valve are opened,
Since the opening of the second opening / closing valve is delayed for a predetermined time after opening the first opening / closing valve, the sudden pressure on the secondary side generated when the two opening / closing valves configured to sandwich the governor are opened. It has become possible to appropriately avoid inconveniences such as rising. Further, according to the control device of the gas supply device of the present invention, when the first opening / closing valve and the second opening / closing valve are opened, the opening of the second opening / closing valve is delayed for a predetermined time after opening the first opening / closing valve. Since the control means is provided, the gas supply device has a simple structure with a normally open type governor with a small number of parts, and appropriately avoids the inconvenience such as a sudden pressure increase on the secondary side that occurs when the on-off valve opens. It has become possible to provide.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a gas supply device of the present invention.

FIG. 2 is a sectional view showing an embodiment of a gas supply device of the present invention.

FIG. 3 is a perspective view showing a cross section of a main body of a gas supply device according to an embodiment of the present invention.

FIG. 4 is a diagram showing a circuit of control means.

FIG. 5 is a cross-sectional view showing a gas supply device having a normally open type governor having a simple structure.

FIG. 6 is a cross-sectional view showing a normally closed type governor having a complicated structure.

FIG. 7 is a diagram showing pressure fluctuation graphs on the primary side and the secondary side of the gas supply device.

[Explanation of symbols]

 1 1st solenoid valve 2 2nd solenoid valve 3 governor 31 flange 32 flange 33 main body 41 control means

Claims (2)

[Claims] 1. A normally open type governor for keeping a gas pressure constant, a first opening / closing valve having an output port connected to an input port of the governor, and a second opening / closing valve having an input port connected to an output port of the governor. In a method of controlling a gas supply device having an opening / closing valve, when opening the first opening / closing valve and the second opening / closing valve, opening the second opening / closing valve is delayed for a predetermined time after opening the first opening / closing valve. A method for controlling a gas supply device, comprising: 2. A normally open type governor for keeping a gas pressure constant, a first opening / closing valve having an output port connected to an input port of the governor, and a second opening / closing valve having an input port connected to an output port of the governor. In a control device of a gas supply device having an opening / closing valve, when opening the first opening / closing valve and the second opening / closing valve, after opening the first opening / closing valve, delaying opening of the second opening / closing valve for a predetermined time. A control device for a gas supply device, comprising a control means for controlling the gas supply device.