JP2001249724A - Pressure regulator - Google Patents

Abstract

(57) [Problem] To stabilize an adjustment pressure even when a gas flow rate increases. When the flow rate is low, a low pressure diaphragm (75) is displaced in accordance with a pressure change in a low pressure decompression chamber (73), and a low pressure valve (8) is displaced.
9 opens and closes to adjust the pressure in the low-pressure decompression chamber 73. At this time, there is almost no pressure difference between the upstream and downstream of the orifice 99. Therefore, the supply low-pressure diaphragm 115 of the supply low-pressure reducing unit 113 is displaced so as to close the bypass valve 143. The orifice 9
9, the pressure in the gas introduction space 127 on the downstream side decreases, and the pressure difference between the pressure drop portion and the supply low-pressure decompression chamber 129 causes the supply low-pressure diaphragm 115 to be displaced. And the bypass valve 143 opens,
The bypass nozzle part 145 opens. By opening the bypass nozzle part 145, the gas flowing out therefrom becomes straight toward the gas outlet passage 57.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure regulator for regulating the pressure of a gas supplied from a gas supply side to a gas use side.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view of a conventional pressure regulator disclosed in Japanese Patent Publication No. 11-2977184. This pressure regulator is used from a LP gas cylinder on the gas supply side to a combustor such as a gas range on the gas use side.
It is provided in the middle of a gas supply passage for supplying LP gas.

[0003] A gap between the gas inlet passage 1 on the left side and the gas outlet passage 3 on the right side is 0.07 to 1.56 MPa.
Pressure reducing unit 5 for reducing the pressure of the gas introduced in step 2 to about 0.06 MPa, and further reducing the pressure by 2.55 to 3.3K.
A low-pressure decompression unit 7 for reducing the pressure to about Pa is provided.

[0004] In the intermediate pressure reducing section 5, when the gas is used on the combustor side, the pressure in the intermediate pressure reducing chamber 9 is reduced, and when the intermediate pressure diaphragm 13 is pressed downward by the intermediate pressure spring 11 and displaced, the pressure is reduced. Accordingly, the intermediate pressure valve 15 moves downward to open the intermediate pressure nozzle portion 17. Thus, the gas introduced from the gas inlet passage 1 flows into the medium pressure decompression chamber 9. When the pressure in the intermediate-pressure decompression chamber 9 rises and this pressure overcomes the elastic force of the intermediate-pressure spring 11, the intermediate-pressure valve 15 moves upward and narrows the flow path of the intermediate-pressure nozzle portion 17, and moves to the intermediate-pressure decompression chamber 9. Control the flow of gas. Thus, the intermediate pressure valve 15
Controls the pressure of the gas flowing into the medium pressure decompression chamber 9 by controlling the opening and closing of the flow path of the medium pressure nozzle portion 17.

On the other hand, in the low pressure decompression section 7, the gas is used on the combustor side, so that the pressure in the low pressure decompression chamber 19 is reduced.
3 is pressed downward and displaced, the low pressure valve 2
5 moves rightward to open the low-pressure nozzle 27. As a result, the gas on the side of the medium pressure decompression chamber 9 is transferred to the gas communication passage 29.
Through the gas outlet passage 3. When the pressure in the low-pressure decompression chamber 19 rises and this pressure overcomes the elastic force of the low-pressure spring 21, the low-pressure diaphragm 23 is displaced upward, and the low-pressure valve 25 moves to the left to move the low-pressure nozzle portion 27.
The flow of the gas into the low-pressure decompression chamber 19 is controlled by narrowing the flow path. In this manner, the low-pressure valve 25 controls the opening and closing of the flow path of the low-pressure nozzle unit 27 to control the pressure of the gas flowing into the low-pressure decompression chamber 19.

Below the low-pressure reducing section 7, a supply low-pressure reducing section 31 is provided. In the gas communication passage 29 between the supply low-pressure reducing section 31 and the low-pressure reducing section 7, an orifice 3 is provided.
3 are provided.

Here, when the flow rate of the gas flowing through the gas communication passage 29 from the medium pressure nozzle portion 17 toward the low pressure nozzle portion 27 is small, the pressure P of the gas communication passage 29 on the upstream side of the orifice 33 is determined. ₀ and the low pressure nozzle 27 on the downstream side
Hardly occurs a pressure difference between the pressure P ₁ of the. The pressure P ₀ is equal to the pressure P _{2 of the} supply low-pressure reducing chamber 37 communicating with the gas communication passage 29 through the outlet bypass passage 35, and the pressure P ₁ is the low-pressure nozzle portion 27 and the small hole 39.
Is equal to the pressure of the spring chamber 41 communicating with the spring chamber 41.

There is almost no pressure difference between the pressure P ₀ and the pressure P ₁ as described above, in other words, the pressure (P ₁ ) in the spring chamber 41 and the pressure P in the supply low-pressure decompression chamber 37.
_{When 2} (= P ₀ ) is approximately equal, the supply low-pressure diaphragm 45 is displaced downward by the load of the supply low-pressure spring 43. As a result, the lever 47 rotates counterclockwise, the bypass valve 49 closes the bypass nozzle part 51, and the outflow of gas from the supply low-pressure decompression chamber 37 to the gas outlet passage 3 is stopped. Become.

The flow rate of the gas flowing through the gas communication passage 29 is
As the flow rate increases and the flow rate increases, before and after the orifice 33
Pressure loss occurs and P₀> P₁Next, spring room 4
1 pressure (P₁) Drops and the pressure of the supply low pressure decompression chamber 37 decreases.
Force P₂(= P₀) Lower. Low pressure decompression chamber 37 for supply
Pressure P₂(= P₀) Is the pressure of the spring chamber 41
(P ₁), For example, 0.01 MPa higher
Supply low pressure spring 43 flexes and supply low pressure diaphragm
45 is displaced upward, and accordingly, the lever 47 is turned clockwise.
To rotate. As a result, the bypass valve 49
The gas pressure in the medium pressure decompression chamber 9 is released by opening the outlet section 51.
After passing through the bypass passage 35, the supply
It flows to the gas outlet passage 3 via the pass nozzle part 51.

In the pressure regulator in which such a gas flow is generated, the low-pressure reducing section 7 mainly serves to adjust the pressure on the gas outlet passage 3 side, and the supply low-pressure reducing section 31 mainly serves as the gas outlet passage. 3 serves to supply gas.

[0011]

By the way, in the conventional pressure regulator as described above, in the gas outlet passage 3, the gas flowing out of the low pressure nozzle portion 27 of the low pressure decompression portion 7 and the gas of the supply low pressure decompression portion 31 are supplied. The gas flowing out of the bypass nozzle portion 51 for supplying gas is mainly set at a substantially intermediate position where the gas flowing out of the bypass nozzle portion 51 joins with the inner wall 52 located in front of the bypass nozzle portion 51. Turbulence occurs. For this reason, a pressure loss occurs in this portion, and a pressure difference occurs mainly between the low-pressure decompression unit 7 and the low-pressure decompression unit 7 that adjusts the pressure. As a result, the adjustment pressure in the low-pressure decompression chamber 19 tends to be lower than a design value as the flow rate increases. There is a problem that stable performance cannot be obtained as a pressure regulator.

FIG. 6 shows the relationship between the flow rate of the gas flowing from the supply low-pressure decompression chamber 37 to the gas outlet passage 3 and the adjustment pressure in the low-pressure decompression chamber 19. It can be seen that the adjustment pressure has been reduced in accordance with.

Accordingly, an object of the present invention is to stabilize the regulated pressure even when the gas flow rate increases.

[0014]

In order to achieve the above object, a first aspect of the present invention is to provide a first valve body capable of opening and closing a first nozzle portion communicating a gas inlet passage and a gas outlet passage. A first pressure reducing means having a first diaphragm for causing the opening and closing operation of the first valve element to be performed by being displaced based on a pressure change on the gas outlet passage side, the gas inlet passage and the first A differential pressure generating means that is provided between the nozzle section and the pressure reducing section in accordance with the gas flow, and a pressure reducing section on the downstream side of the differential pressure generating section, on the upstream side of the differential pressure generating section. A second diaphragm, which defines a decompression chamber that communicates with it, and that is displaced based on a pressure difference between the pressure reduction unit and the decompression chamber, a second nozzle that communicates the decompression chamber with the gas outlet passage, The second nozzle section is connected to the second nozzle section.
And a second pressure reducing means provided with a second valve element which can be opened and closed in conjunction with the operation of the diaphragm, wherein the pressure of the gas from the second nozzle portion to the gas outlet passage is reduced. The flow direction is linear.

According to the pressure regulator having such a configuration, at the time of a small flow rate, the first diaphragm is displaced in accordance with a pressure change on the gas outlet passage side, and based on this, the first valve body is moved to the first valve body.
The nozzle section is opened and closed to adjust the pressure on the gas outlet passage side. At this low flow rate, there is almost no pressure difference between the upstream side and the downstream side of the differential pressure generating means. Therefore, the second diaphragm in the second pressure reducing means connects the second valve body to the second nozzle portion. Displaced to close. When the gas flow rate increases and the flow velocity increases, a pressure loss occurs between the upstream and downstream of the differential pressure generating means, and the pressure on the downstream side drops to become a pressure drop section. The second diaphragm is displaced by the pressure difference between the pressure lowering section and the pressure reducing chamber communicating with the upstream side of the differential pressure generating means, and the second valve body is actuated accordingly to cause the second diaphragm to move. The nozzle part of is opened. By opening the second nozzle portion, the gas flowing from the gas inlet passage into the decompression chamber becomes straight when flowing from the decompression chamber through the second nozzle portion to the gas outlet passage.

According to a second aspect of the present invention, in the configuration of the first aspect, the gas flows from the gas inlet passage to the gas outlet passage through the decompression chamber and the second nozzle portion in a straight line. .

According to the above construction, when the second valve element is operated and the second nozzle is opened, the flow of gas flowing from the gas inlet passage to the gas outlet passage through the decompression chamber and the second nozzle portion. The direction becomes linear.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a pressure regulator showing an embodiment of the present invention. This pressure regulator is also supplied from a LP gas cylinder to a combustor such as a gas range, similarly to the conventional pressure regulator. Is provided in the middle of the gas supply passage for supplying the gas. The housing 53 includes a gas inlet passage 55
Body 59 having a gas outlet passage 57 and
An upper body 61 is mounted on the upper part of the upper body 61, and a cover 63 is mounted on the upper part of the upper body 61.

On the upper body 61 side, 0.07 to 1.56
The pressure of the gas introduced at MPa is 2.55 to 3.3K.
A low-pressure decompression unit 65 is provided as first decompression means for decompressing to about Pa.

The low-pressure reducing section 65 includes a low-pressure diaphragm 75 as a first diaphragm which is pressed by the low-pressure spring 69 from the atmospheric pressure chamber 67 to the low-pressure reducing chamber 73 via the diaphragm receiving plate 71. The low-pressure decompression chamber 73 includes through holes 77 and 78 formed in the upper body 61.
It communicates with the gas outlet passage 57 through a passage 79 formed in the lower body 59 and 79. Low pressure diaphragm 75
Has a peripheral edge sandwiched and fixed between the upper body 61 and the cover 63, and airtightly partitions the atmospheric pressure chamber 67 and the low pressure reducing chamber 73. The atmospheric pressure chamber 67 is opened to the atmosphere through an atmosphere opening hole 81.

At the center of the low-pressure diaphragm 75, an operating rod 83 is provided vertically penetrating.
One end of a lever 85 is slidably cross-engaged with a lower part of the lever. The lever 85 is connected to the upper body 6 around the pin 87.
The other end is connected to a low-pressure valve 89 as a first valve body.

The upper body 61 is provided with a gas communication passage 91 for communicating the gas inlet passage 55 with the low-pressure decompression chamber 73. A low-pressure valve case 93 is fixed to an opening 91 a at an end of the gas communication passage 91 on the low-pressure decompression chamber 73 side. The low-pressure valve 89 is housed in the low-pressure valve case 93 so as to be movable in the left-right direction in FIG.
Low pressure nozzle part 95 as a first nozzle part formed in
Is opened and closed, whereby the pressure reducing chamber 73 for bottom pressure and the gas communication passage 9 are opened and closed.
1 and the communication is cut off.

The gas inlet passage 55 side of the gas communication passage 91 is
The lower end of the vertical passage 91c is formed of a horizontal passage 91b and a vertical passage 91c.
Through the gas inlet passage 55. Vertical passage 9
1c is provided with an orifice 99 as a differential pressure generating means. The passage of the gas through the orifice 99 causes a pressure loss between the upstream and downstream thereof, and the downstream low-pressure nozzle 95 side serves as a pressure reducing portion.

At the tip of the operating rod 83 projecting into the atmospheric pressure chamber 67, an enlarged portion 101 is formed.
01 and a low-pressure diaphragm 75
A safety valve adjusting spring 105 is interposed between the center of the spring and the center of the spring. The safety valve adjusting spring 105 constantly urges the valve body 107 of the safety valve formed integrally with the operating rod 83 in a direction in which the valve body 107 comes into contact with the low-pressure diaphragm 75.

A drain prevention cap 109 is fixed to the upper body 61 by a screw 111 between the horizontal passage 91b of the gas communication passage 91 and the opening 91a. The drain prevention cap 109 is located below the low-pressure decompressing section 65, and the gas is supplied onto a supply low-pressure diaphragm 115 as a second diaphragm in a supply low-pressure depressurization section 113 as a second decompression section described later. To prevent foreign matter such as drain contained in the liquid from accumulating.

The drain prevention cap 109 is accommodated in a cap accommodating portion 117 formed in the upper body 61 via a sealing material 118 with the lower side being open. The upper body 61 in the cap housing portion 117
In the part on the right side of FIG.
9 is formed, and the opening 119 is sealed by the drain prevention cap 109 being housed in the cap housing part 117.

An annular concave portion 121 is formed on the inner wall surface of the upper body 61 facing the peripheral side portion of the drain prevention cap 109, whereby the peripheral side portion of the drain prevention cap 109 and the concave portion 121 of the upper body 61 are formed. A communication path 123 that connects the opening 91a in the gas communication path 91 and the horizontal path 91b is formed therebetween. The communication path 123 and the opening 91a have substantially the same length in the up-down direction in the figure, and the drain prevention cap 109, which is substantially opposite to the upper half of the opening 91a, has a connection path 123. A communication hole 125 is formed which communicates with the gas introduction space 127 inside the drain prevention cap 109.

FIGS. 2A and 2B are perspective views showing the shape of the inner wall surface of the cap accommodating portion 117 of the upper body 61 and the shape of the gas communication passage 91 communicating with the recess 121. FIG.
Is installed from below (a).
FIG. 9 is a perspective view of FIG. FIG. 3 shows the drain prevention cap 109.
FIG. 14 is a perspective view of a state in which is stored in a cap storage part 117. The gas flowing into the gas communication passage 91 from the gas inlet passage 55 flows into the communication passage 123, and then flows into the arrows A and B in FIG.
As shown by, the drain prevention cap 10
9 and merges at the opening 91a.

The supply low-pressure diaphragm 115 in the supply low-pressure decompression unit 113 includes an upper body 61 and a lower body 59.
The supply low-pressure diaphragm 115 hermetically seals the gas introduction space 127 inside the drain prevention cap 109 and the supply low-pressure reduction chamber 129 as a pressure reduction chamber of the lower body 59. The supply low-pressure spring 1 contained in the gas introduction space 127
31 presses against the supply low pressure decompression chamber 129 side.

At the center of the supply low-pressure diaphragm 115, a diaphragm shaft 133 is provided vertically penetrating, and the diaphragm shaft 133 is integrally formed on the supply low-pressure decompression chamber 129 side with a flange 133a. And a nut 13 on the gas introduction space 127 side.
5 is screwed together. Between the flange 133a and the nut 135, the supply low-pressure diaphragm 115 is
By clamping and fixing through the diaphragm receiving plate 137,
The diaphragm shaft 133 is a low-pressure diaphragm 115 for supply.
Fixed to

One end of a lever 139 is slidably cross-engaged with the lower end of the diaphragm shaft 133. Lever 1
39 is rotatably supported on the lower body 59 about the pin 141, and the other end is connected to a bypass valve 143 as a second valve body.

The supply low-pressure decompression chamber 129 communicates with the gas inlet passage 55 and can communicate with the gas outlet passage 57. A bypass nozzle 147 provided with a bypass nozzle part 145 as a second nozzle part is mounted. The bypass valve 143 is connected to the supply low-pressure decompression chamber 12 so that the bypass nozzle 145 can be opened and closed.
9 so as to be movable in the left-right direction.

The bypass nozzle portion 145 is set such that the gas flowing out of the bypass nozzle portion 145 has a linear flow direction toward the gas outlet passage 57. Further, the supply low-pressure decompression chamber 1 is supplied from the gas inlet passage 55.
The flow direction of the gas reaching the gas outlet passage 57 through the gas outlet 29 and the bypass nozzle part 145 is also linear.

Next, the operation of the pressure regulator having the above configuration will be described. In the low-pressure decompression unit 65, the gas is used on the combustor side, so that the pressure in the low-pressure decompression chamber 73 is reduced, and the low-pressure diaphragm 75 is pressed downward by the low-pressure spring 69 to be displaced. As the lever 85 rotates counterclockwise, the low-pressure valve 89 moves rightward to open the low-pressure nozzle 95. As a result, the gas communication passage 91 and the communication passage 123
Flows through the low-pressure nozzle 95 and flows out to the gas outlet passage 57.

When the pressure in the low-pressure decompression chamber 73 rises and overcomes the elastic force of the low-pressure spring 69, the low-pressure diaphragm 75 is displaced upward, and the low-pressure valve 89 moves to the left, and the low-pressure nozzle 95 The flow path is narrowed, and the low-pressure decompression chamber 73 is used.
Controls the flow of gas into the system. In this manner, the low-pressure valve 89 controls the opening and closing of the flow path of the low-pressure nozzle unit 95 to control the low-pressure decompression chamber 7.
3 controls the pressure of the gas flowing into it.

[0037] Here, when the flow rate of gas flowing through the gas communication passage 91 toward the gas inlet passage 55 to the low pressure nozzle 95 is small, low pressure P ₀ and the downstream side of the upstream side to the orifice 99 as a boundary hardly occurs a pressure difference between the pressure P ₁ of the nozzle portion 95. The pressure P ₀ is equivalent to the pressure P _{2 of the} supply low-pressure reducing chamber 129 communicating with the gas communication passage 91 through the passage 97 and the gas inlet passage 55, and the pressure P ₁ communicates with the low-pressure nozzle 95. Hole 1
The pressure is equal to the pressure of the gas introduction space 127 which communicates through 25.

The pressure P as described above₀And pressure P₁Between
With almost no pressure difference, in other words, gas introduction empty
127 pressure (P₁) And the pressure of the supply low pressure decompression chamber 129
Force P ₂(= P₀) Is approximately equal to the supply low pressure
Low pressure diaphragm for supply by the load of spring 131
115 is displaced downward. As a result, the lever 139 is
By turning clockwise, the bypass valve 143 is turned to the bypass nozzle.
Close the part 145 and supply the gas from the low pressure decompression chamber 129 for supply to the gas outlet.
Outflow of gas into the passage 57 is stopped.

When the flow rate of the gas flowing through the gas communication passage 91 increases and the flow velocity increases, a pressure loss occurs before and after the orifice 99 so that P ₀ > P ₁ and the gas introduction space 1
The pressure (P ₁ ) of the pressure vessel 27 decreases and the supply low-pressure decompression chamber 129
Of pressure P ₂ (= P ₀ ). When the pressure P ₂ (= P ₀ ) of the supply low-pressure decompression chamber 129 becomes higher than the pressure (P ₁ ) of the gas introduction space 127 by, for example, 0.01 MPa, the supply low-pressure spring 131 is bent and the supply low-pressure diaphragm 115 moves upward. , And the lever 139 rotates clockwise accordingly. As a result, the bypass valve 143 moves to the left in the figure to open the bypass nozzle portion 145, and the gas flowing into the gas inlet passage 55 flows from the supply decompression chamber 129 through the bypass nozzle portion 145 to the gas outlet passage 145. Flow to 57.

In the pressure regulator in which such a gas flow is generated, the low-pressure reducing section 65 mainly serves to regulate the pressure on the gas outlet passage 57 side, similarly to the conventional pressure regulator shown in FIG. The supply low-pressure reducing section 113 mainly serves to supply gas to the gas outlet passage 57.

The flow of the gas flowing out of the bypass nozzle portion 145 opened by the movement of the bypass valve 143 to the left in the drawing becomes straight toward the gas outlet passage 57, so that the turbulence after the outflow is generated. The generation of the flow is prevented and the pressure loss is also avoided. Therefore, even if the flow rate increases, the regulated pressure in the low-pressure decompression chamber 73 communicating with the gas outlet passage 57 is stabilized, and stable performance as a pressure regulator can be obtained.

Further, the flow direction of the gas flowing from the gas inlet passage 55 to the gas outlet passage 57 through the supply low pressure decompression chamber 129 and the bypass nozzle portion 145 is also linear, so that the flow passage resistance is reduced, and Further regulation pressure stabilization is achieved.

FIG. 4 shows the relationship between the flow rate of gas flowing from the supply low-pressure decompression chamber 129 toward the gas outlet passage 57 and the adjustment pressure in the low-pressure decompression chamber 73.
According to this, it can be seen that even when the flow rate increases, the adjustment pressure is hard to decrease and is almost constant.

[0044]

As described above, according to the first aspect of the present invention, the gas that has flowed into the decompression chamber from the gas inlet passage by opening the second nozzle portion is supplied to the second nozzle portion from the decompression chamber. When flowing into the gas outlet passage, the flow direction becomes linear, so that turbulence after the outflow is prevented, pressure loss is avoided, and therefore even if the flow rate increases, the low-pressure decompression chamber leading to the gas outlet passage , The regulated pressure is stabilized, and stable performance as a pressure regulator can be obtained.

According to the second aspect of the present invention, since the flow direction of the gas from the gas inlet passage to the gas outlet passage through the decompression chamber and the second nozzle portion is made linear, the flow path resistance is reduced. Further regulation pressure regulation can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pressure regulator showing one embodiment of the present invention.

2A is a perspective view showing an inner wall shape of a cap housing portion of an upper body to which a drain prevention cap is mounted in the pressure regulator of FIG. 1, and FIG. 2B is a perspective view of the drain prevention cap. is there.

FIG. 3 is a perspective view showing a state in which a drain prevention cap is attached to an upper body.

4 is a correlation diagram between a flow rate of a gas flowing from a supply low-pressure decompression chamber to a gas outlet passage in the pressure regulator of FIG. 1 and an adjustment pressure in the low-pressure decompression chamber.

FIG. 5 is a cross-sectional view of a pressure regulator showing a conventional example.

6 is a correlation diagram between a flow rate of gas flowing from a supply low-pressure decompression chamber to a gas outlet passage in the pressure regulator of FIG. 5 and an adjustment pressure in the low-pressure decompression chamber.

[Explanation of symbols]

55 gas inlet passage 57 gas outlet passage 65 low-pressure reducing unit (first reducing unit) 75 low-pressure diaphragm (first diaphragm) 89 low-pressure valve (first valve body) 95 low-pressure nozzle unit (first nozzle unit) 99 Orifice (differential pressure generating means) 113 Low-pressure decompression section for supply (second decompression means) 115 Low-pressure diaphragm for supply (second diaphragm) 129 Low-pressure decompression chamber for supply (decompression chamber) 143 Bypass valve (second valve element) ) 145 bypass nozzle part (second nozzle part)

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[Procedure amendment]

[Submission date] July 28, 2000 (2007.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art FIG. 5 is a sectional view of a conventional pressure regulator disclosed in Japanese Patent No. 2971874. This pressure regulator is supplied from the LP gas cylinder on the gas supply side.
This is provided in the middle of a gas supply passage for supplying LP gas to a combustor such as a gas range on the gas use side.

Continued on the front page F term (reference) 3E072 AA01 CA04 DB03 GA30 3H060 AA09 BB01 CC01 CC03 CC15 DA03 DB02 DB13 DC04 DC10 DD02 DD04 DD12 DD14 DD17 HH07 HH24 3J071 AA02 BB11 CC11 FF03 5H316 AA11 BB05 CC04 DD02 EE01 DD02 DD07 DD02 GG15 JJ01 JJ13 KK02 KK05 KK08

Claims (2)

[Claims] 1. A first valve body capable of opening and closing a first nozzle portion communicating a gas inlet passage and a gas outlet passage, and an opening and closing operation of the first valve body is performed by a pressure on the gas outlet passage side. A first pressure reducing means provided with a first diaphragm which is performed by being displaced based on a change; and a pressure reducing means provided between the gas inlet passage and the first nozzle portion to reduce a pressure according to a gas flow. A differential pressure generating means, and a pressure reducing section on the downstream side of the differential pressure generating means, while defining a decompression chamber communicating with the upstream side of the differential pressure generating means, and the pressure reducing section and the depressurizing chamber A second diaphragm that is displaced based on the pressure difference of the second, a second nozzle that communicates the decompression chamber with the gas outlet passage, and opens and closes the second nozzle in conjunction with the operation of the second diaphragm A possible second valve body is provided and configured. In the pressure regulator and a second pressure reducing means, the pressure regulator, characterized in that the linear flow direction of the gas leading to the gas outlet passage from said second nozzle portion. 2. The pressure regulator according to claim 1, wherein the flow direction of the gas from the gas inlet passage to the gas outlet passage via the decompression chamber and the second nozzle portion is linear.