JP2002333924A - Pressure regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibration. SOLUTION: This pressure regulator is provided with a vacuum chamber, a valve element capable of opening and closing a nozzle part for communicating a gas inlet passage to the vacuum chamber, an atmospheric pressure chamber 11 allowing atmosphere to inflow and outflow through a vent hole 15, a diaphragm air-tightly partitioning the vacuum chamber and the atmospheric pressure chamber and being displaced according to the pressure difference of the both chambers, a displacement transmitting means transmitting the displacement of the diaphragm to the valve element, and a spring energizing the valve element to the closing side. The pressure regulator is provided with a valve mechanism 100 for increasing the channel resistance of the vent hole 15 when air outflows from the atmospheric pressure chamber 11 to the outside, and for decreasing the channel resistance of the vent hole 15 when air inflows from the outside to the atmospheric pressure chamber 11. The valve mechanism 100 is provided with a valve element 102 capable of opening and closing the opening of the vent hole 15, a spring 104 energizing the valve disc 102 to a position where the opening of the vent hole 15 is closed, and a notched groove 106 for communicating the vent hole 15 to the outside even when the opening of the vent hole 15 is closed by the valve disc 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure regulator for regulating the pressure of a gas sent to a supply destination.

[0002]

2. Description of the Related Art As a pressure regulator of this type, Japanese Patent Publication No. 2971874 and the like disclose a housing having a gas inlet passage and a gas outlet passage, a pressure reducing chamber communicating with the gas outlet passage, a gas inlet passage and a pressure reducing chamber. A valve body capable of opening and closing a communicating nozzle portion, an atmospheric pressure chamber through which air can flow in and out through a vent, and the decompression chamber and the atmospheric pressure chamber are airtightly defined and displaced in accordance with a pressure difference between the two chambers. The diaphragm to be displaced and the displacement of the diaphragm are transmitted to the valve body, and when the diaphragm is displaced to the atmospheric pressure chamber side, the valve body is displaced to the closed side, and when the diaphragm is displaced to the decompression chamber side, the valve body is displaced to the open side. 2. Description of the Related Art There is known a pressure regulator including a displacement transmitting unit and a spring for urging the valve body to a closing side.

In a pressure regulator using a diaphragm of this type, since the pressure reducing mechanism is composed of a vibrating body such as a spring or a diaphragm, the vent has a function of suppressing vibration. Specifically, it is common to design the diameter and length of the ventilation hole into an appropriate shape suitable for the adjuster.

[0004]

By the way, the larger the diameter of the vent hole, the easier the flow of the air through the vent hole becomes, so that the movement of the diaphragm can be accelerated. Ventilation makes it difficult to suppress.
Also, if the diameter of the ventilation hole is reduced in order to increase the vibration suppressing effect, the movement of the diaphragm becomes slow, and the phenomenon that the adjustment pressure temporarily increases or decreases easily occurs. Therefore, it is difficult to reduce the diameter only in consideration of the suppression of vibration, and the vibration suppression effect is not always high in the conventional device.

The present invention has been made in view of the above circumstances, and has as its object to provide a pressure regulator that can exhibit a high vibration suppression effect without extremely reducing the diameter of a vent hole.

[0006]

According to a first aspect of the present invention, a housing having a gas inlet passage and a gas outlet passage, a decompression chamber communicating with the gas outlet passage, and a nozzle portion communicating the gas inlet passage with the decompression chamber are provided. An openable and closable valve body, an atmospheric pressure chamber through which air can flow in and out through a vent, a diaphragm which airtightly defines the decompression chamber and the atmospheric pressure chamber and is displaced in accordance with a pressure difference between the two chambers, Displacement transmitting means for transmitting the displacement of the diaphragm to the valve body, displacing the valve body to the closing side when the diaphragm is displaced to the atmospheric pressure chamber side, and displacing the valve body to the open side when the diaphragm is displaced to the decompression chamber side, A pressure regulator having a biasing means for biasing the valve body to a closing side, wherein the air passage increases the flow path resistance of the ventilation hole when air flows out of the atmospheric pressure chamber to the outside; The flow path of the vent when air enters the atmospheric pressure chamber from the It is characterized in that a flow resistance varying means for reducing anti-a.

According to the present invention, the speed at which air exits from the atmospheric pressure chamber through the vent hole and the speed at which air enters the atmospheric pressure chamber from outside can be changed. That is, when the diaphragm vibrates, the speed at which the diaphragm is displaced to one side and the speed at which the diaphragm is displaced to the other side can be changed. Therefore,
The reciprocating cycle of the diaphragm can be shifted, and the vibration of the pressure regulator can be suppressed.

According to a second aspect of the present invention, there is provided the pressure regulator according to the first aspect, wherein the flow path resistance varying means is capable of opening and closing an opening surface of the ventilation hole, and is provided from the atmospheric pressure chamber to the outside. A valve body which is pushed to the open side by air flow when air comes out, and is pushed to the close side by air flow when air enters the atmospheric pressure chamber from the outside, and a position where the valve body closes the opening surface of the vent. And a small-diameter flow path for communicating the vent hole with the outside even when the valve element closes the opening surface of the vent hole.

In this invention, since the valve body is normally pushed by the spring and is in the closed position, air flows only through the small-diameter passage, and the air flow is suppressed.
Vibration is hardly caused. When the diaphragm vibrates from this state, high-pressure air flows in and out through the ventilation holes. Here, when the air comes out of the vent hole at a high pressure, the valve body moves against the spring to open the opening surface of the through hole, so that the air can flow out quickly with little resistance. Conversely, when air enters through the ventilation hole, the valve element closes the opening surface of the ventilation hole, so that air flows in only through the small flow path, so that air can flow in at a suppressed speed. it can. Therefore, since the inflow / outflow speed of the air changes, the vibration frequency becomes different and the vibration is suppressed. In this case, even if the diameter of the ventilation hole is not extremely reduced, the vibration suppressing effect can be easily obtained only by providing the valve body in the ventilation hole.

A third aspect of the present invention provides a housing having a gas inlet passage and a gas outlet passage, a pressure reducing chamber communicating with the gas outlet passage, and a valve body capable of opening and closing a nozzle portion communicating the gas inlet passage with the pressure reducing chamber. An atmospheric pressure chamber through which air can flow in and out through a vent; a diaphragm which airtightly defines the decompression chamber and the atmospheric pressure chamber and which is displaced according to a pressure difference between the two chambers; and a valve body which displaces the diaphragm. A displacement transmitting means for displacing the valve body to the closing side when the diaphragm is displaced to the atmospheric pressure chamber side, and displacing the valve body to the open side when the diaphragm is displaced to the decompression chamber side; and A pressure regulator having a biasing means for biasing the pressure regulating means, wherein the ventilation hole is provided with a ventilation means having a large number of small diameter holes.

According to the present invention, when the diaphragm vibrates, high-pressure air flows in and out through the ventilation holes. However, the ventilation holes are provided with ventilation means having a large number of small-diameter holes. When air flows through the small-diameter hole, an effect of suppressing air flow acts, and vibration is suppressed.

[0012]

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

FIG. 1 is a structural view of a main part of the pressure regulator of the first embodiment, FIG. 2 is a structural view of a main part of the second embodiment, and FIG. 3 is an overall structural diagram of the pressure regulator of both embodiments. is there. First, FIG.
The overall configuration will be described with reference to FIG.

This pressure regulator is provided in the middle of a gas supply passage for supplying LP gas from a LP gas cylinder to a combustor such as a gas range.
The first functioning mainly as a pressure controller (decompression mechanism)
And the second valve means 40 mainly functioning as a flow control unit.

The housing 1 is constructed by combining a second body 5 on a first body 4 provided with a gas inlet passage 2 and a gas outlet passage 3, and further combining a cover 6 thereon.

The first valve means 10 has a first diaphragm 14 pressed from the atmospheric pressure chamber 11 side to the decompression chamber 13 side by the first spring 12. The peripheral edge of the first diaphragm 14 is sandwiched and fixed between the second body 5 and the cover 6 to partition the atmospheric pressure chamber 11 and the pressure reducing chamber 13 in an airtight manner. The decompression chamber 13 communicates with the gas outlet passage 3, and the atmospheric pressure chamber 11 communicates with the atmosphere through a vent 15.

At the center of the first diaphragm 14, an operating rod 16 is provided vertically penetrating therethrough.
One end of a lever 17 is slidably cross-engaged with the lower part of the bracket 6. The lever 17 is rotatably supported on the second body 5 about a pin 18, and the other end is connected to a piston-like first valve body 19.

In this example, the operating rod 16 and the lever 1 are mainly
7 constitutes a displacement transmission mechanism for transmitting the displacement of the diaphragm 14 to the first valve body 19. In the first body 4 and the second body 5, a first gas communication passage 20 that communicates the gas inlet passage 2 and the gas outlet passage 3 is formed as a long and narrow complicated passage. The valve case 21 is fixed to the gas outlet passage 3 side of the valve case 20. First
The valve body 19 is accommodated in the valve case 21 so as to be movable in the left-right direction in the figure, and opens and closes a first nozzle portion 22 formed in the valve case 21, whereby the gas inlet passage 2 and the gas outlet passage The function of interrupting communication with the device 3 is achieved.

In the middle of the first gas communication passage 20, a hollow chamber 3 is provided.
A cap-shaped flow path forming cover 31 is fitted inside the hollow chamber 30. First gas communication path 20
Is configured to include an annular passage 32 secured on the outer periphery of the flow path forming cover 31. Since the first gas communication passage 20 has an elongated and complicated structure, when the gas flows through the communication passage 20, a flow path resistance corresponding to the flow velocity is generated. A differential pressure is generated between the gas inlet passage 2 and the first nozzle portion 22 between the outlet side and the gas inlet passage 2. This differential pressure is the first
Flow rate (that is, flow rate) of gas flowing through the gas communication passage 20
The gas communication passage 20 functions as a differential pressure generating means.

The gas inlet passage 2 and the first nozzle 22
An orifice may be provided at any position of the first gas communication passage 20 connecting the first and second gas communication paths 20 to generate a pressure difference according to the flow velocity. In such a case, it is not necessary to form the first gas communication passage 20 in a specially complicated shape or as an elongated flow passage.

The internal space of the flow path forming cover 30 is a first differential pressure chamber 41. The first differential pressure chamber 41 is formed by a small nozzle 33 formed in the peripheral wall of the flow path forming cover 30 so as to form a first nozzle. It communicates with the part 22. In addition, a second differential pressure chamber 42 is formed below the first differential pressure chamber 41. Second differential pressure chamber 42
Is provided in the middle of the second gas communication passage 43 connecting the gas inlet passage 2 and the gas outlet passage 3 and is directly continuous with the gas inlet passage 2.

A second valve provided below the first valve means 10
The valve means 40 has a second diaphragm 44 whose periphery is clamped and fixed between the first body 4 and the second body 5. The second diaphragm 44 is provided between the first differential pressure chamber 41 and the second
The differential pressure chamber 42 is air-tightly partitioned from the second differential pressure chamber 4 by a spring 45 housed in the flow path forming cover 30.
It is pressed to two sides.

A second nozzle portion 46 is provided at an end of the second gas communication passage 43 on the gas outlet passage 3 side, and a second valve body 47 is provided so as to open and close the second nozzle portion 46. Are provided so as to be movable in the left-right direction in the figure. Second valve body 4
7, one end of a lever 48 is engaged.
Is rotatably supported by the first body 4 via a support pin 49. The other end of the lever 48 is slidably cross-engaged with the lower end of an operating rod 50 fixed to the center of the second diaphragm 44.

Further, inside the housing 1, there is provided a merging portion 60 for merging the gas passing through the first valve means 10 and the gas passing through the second valve means 40. The outlets 10A and 40A of the two valve means 10 and 40 are arranged side by side on one end side of the space secured as the merging portion 60, and the gas outlet passage 3 is connected to the second valve means on the other end side of the merging portion 60. It is provided on the extension of 40 outlets 40A.

Next, the overall operation of the pressure regulator will be described.

In the first valve means 10, the gas is used on the combustor side, so that the pressure in the decompression chamber 13 is reduced, and the first diaphragm 14 is moved downward (to the decompression chamber 13 side) by the spring 12. When the lever 17 is pushed and displaced, the lever 17 rotates counterclockwise and the first valve body 19
Moves rightward to open the first nozzle section 22. Thus, the gas in the gas inlet passage 2 flows to the gas outlet passage 3 via the first gas communication passage 20, the first nozzle portion 22, and the junction 60.

Further, since the outlet 10A of the first valve means 10 communicates with the decompression chamber 13, the pressure in the decompression chamber 13 increases, and when this pressure overcomes the elastic force of the spring 12,
The first diaphragm 14 is displaced upward (atmospheric pressure chamber 11), the first valve body 19 moves to the left to narrow the flow path of the first nozzle portion 22, and the gas to the decompression chamber 13 Control the inflow of water. As described above, the outlet pressure of the first valve means 10 is controlled by controlling the opening degree of the first nozzle portion 22 by the first valve body 19. Here, when the flow rate of the gas flowing through the first gas communication passage 20 from the gas inlet passage 2 toward the first nozzle portion 22 is small, the pressure difference between the inlet side and the outlet side of the first gas communication passage 20 is reduced. Rarely occurs. That is,
There is almost no pressure difference between the first differential pressure chamber 41 and the second differential pressure chamber 42. When there is almost no pressure difference, the second diaphragm 44 is displaced downward (to the side of the second differential pressure chamber 42) by the load of the spring 45. Along with this, the lever 48 rotates counterclockwise, the second valve body 47 closes the second nozzle portion 46, and the gas flows from the gas inlet passage 2 through the second gas communication passage 43 to the gas outlet passage 3. Gas outflow is stopped. When the flow rate of the gas flowing through the first gas communication passage 20 increases and the flow velocity increases, a pressure loss occurs due to the flow path resistance (orifice effect) of the second gas communication passage 20, and the pressure on the inlet side and the outlet side increases. A difference occurs, and the pressure in the first differential pressure chamber 41 decreases and becomes lower than that in the second differential pressure chamber 42. For example 0.01M
When Pa becomes higher, the spring 45 bends and the second diaphragm 44 is displaced upward (to the first differential pressure chamber 41 side), and accordingly, the lever 48 rotates clockwise, and the second valve body 4
7 moves to the left in the figure to open the second nozzle portion 46, and the gas in the gas inlet passage 2 passes through the second gas communication passage 43, the second nozzle portion 46, and the merging portion 60, and the gas exits. Passage 3
Flows to

In the pressure regulator in which such a gas flow is generated, the first valve means 10 mainly functions to regulate the pressure on the gas outlet passage 3 side, and the second valve means 40 mainly controls the gas. It serves to supply gas to the outlet passage 3. A large amount of gas can be supplied through the second nozzle portion 46 of the second valve means 40 without increasing the size of the first diaphragm 14 of the first valve means 10, and a small, lightweight, large-capacity pressure A regulator can be obtained. By the way, in this type of pressure regulator, as described above, the first valve means 1
Since a vibrating body such as the diaphragm 14 and the spring 12 is used as an element constituting 0, vibration is easily caused.

Therefore, in the pressure regulator of the first embodiment,
As shown in FIG. 1, a valve mechanism (flow-path resistance variable means) 100 is provided at an outlet outside the ventilation hole 15 through which air flows in and out of the atmospheric pressure chamber 11. 1A is a cross-sectional view when the valve is closed, FIG. 1B is a cross-sectional view when the valve is open, and FIG. 1C is a perspective view showing a tip shape of a peripheral wall of the ventilation hole 15.

The valve mechanism 100 increases the flow path resistance of the vent hole 15 when air flows out of the atmospheric pressure chamber 11 to the outside, and increases the flow path resistance of the vent hole 15 when air enters the atmospheric pressure chamber 11 from the outside. The opening surface of the vent hole 15 can be opened and closed, and when air flows out from the atmospheric pressure chamber 11 to the outside, it is pushed to the open side by the air flow, and conversely, from the outside to the atmospheric pressure chamber 11. A valve body 102 that is pushed to the closing side by air flow when air enters, and a spring (biasing means) 10 that biases the valve body 102 to a position that closes the opening surface of the vent hole 15.
4 and a cutout groove (small diameter flow path) provided on the end face of the peripheral wall of the ventilation hole 15 for communicating the ventilation hole 15 with the outside even when the valve body 102 closes the opening surface of the ventilation hole 15. 10
6 and a spring cover 108 having an opening 109 also serving as a guide for the valve element 102.

Next, the operation of the valve mechanism 100 will be described.

Normally, the valve element 102 is
, And is in the closed position (position in close contact with the end surface of the peripheral wall of the ventilation hole 15), so that air flows only through the notch groove 106, and the flow of air is suppressed and vibration is unlikely to occur. Is kept.

When the diaphragm 14 vibrates from this state, high-pressure air flows in and out through the ventilation holes 15. When the air exits from the vent hole 15 at a high pressure, as shown in FIG. 1B, the valve body 102 moves rightward in the figure against the spring 104 to open the opening surface of the through hole 15. Therefore, air can be quickly discharged with a small resistance. Conversely, when air enters through the vent hole 15, the valve body 102 closes the opening surface of the vent hole 15, as shown in FIG.
Air will flow only through the notch 106,
Air can flow in at a controlled rate. Therefore, the inflow / outflow speed of air changes, and the vibration of the pressure regulator is suppressed due to the difference in the vibration frequency.

In this case, even if the diameter of the vent hole 15 is not extremely reduced, the vibration suppressing effect can be easily obtained only by providing the valve body 102 in the vent hole 15, and therefore, the realization is easy.

In the pressure regulator of the second embodiment, as shown in FIG. 2, a large number of small-diameter holes 122 are formed in a honeycomb shape with respect to the vent hole 15 instead of a valve mechanism. A member 120 is provided. This ventilation member 120 is composed of (a)
As shown in the front view of FIG. 1 and the side view of FIG. 2B, the outer shape is hexagonal, and a number of small-diameter holes 122 are formed in the axial direction. As described above, when the ventilation dust 120 having the honeycomb-shaped small-diameter holes 122 is provided, the vibration of the first valve means (decompression mechanism) 10 having a specific frequency can be maintained without slowing down the movement of the diaphragm 14. Can be suppressed.

The ventilation member 120 may be formed by resin molding or may be formed by bundling thin metal pipes. The attachment to the ventilation hole 15 is optimally, for example, a screw type.

[0037]

As described above, according to the first aspect of the present invention, the speed at which air exits from the atmospheric pressure chamber through the ventilation hole and the speed at which air enters the atmospheric pressure chamber from the outside are changed. Therefore, the reciprocating cycle of the diaphragm during vibration can be shifted, and the vibration of the pressure regulator can be suppressed.

According to the second aspect of the present invention, vibration can be suppressed by adding a simple structure in which a valve mechanism is attached to the intake hole.

According to the third aspect of the present invention, vibration can be suppressed by adding a simple structure in which a ventilation means having a large number of small diameter holes is provided in the ventilation hole.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of a first embodiment of the present invention,
(A) is a cross-sectional view when the valve is closed, (b) is a cross-sectional view when the valve is open,
(C) is a perspective view showing the tip shape of the peripheral wall of the ventilation hole.

FIG. 2 is a configuration diagram of a main part of a second embodiment of the present invention,
(A) is a front view, (b) is a side view.

FIG. 3 is a cross-sectional view showing the overall configuration of the pressure regulator according to both embodiments of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Gas inlet flow path 3 Gas outlet flow path 11 Atmospheric pressure chamber 12 Spring (biasing means) 13 Decompression chamber 14 Diaphragm 15 Vent hole 16 Working rod (displacement transmission means) 17 Lever (displacement transmission means) 19 Valve body 22 1st nozzle part 100 Valve mechanism (flow-path resistance variable means) 102 Valve body 104 Spring 106 Notch groove (small-diameter flow path) 120 Ventilation means 122 Small-diameter hole

Claims (3)

[Claims] 1. A housing having a gas inlet passage and a gas outlet passage, a decompression chamber communicating with the gas outlet passage, a valve body capable of opening and closing a nozzle portion communicating the gas inlet passage with the decompression chamber, and a vent hole. An atmospheric pressure chamber through which air can flow in and out; a diaphragm that airtightly defines the decompression chamber and the atmospheric pressure chamber and that is displaced in accordance with a pressure difference between the two chambers; and a diaphragm that transmits the displacement of the diaphragm to a valve body. A displacement transmitting means for displacing the valve body to the closed side when displaced to the atmospheric pressure chamber side and displacing the valve body to the open side when the diaphragm is displaced to the decompression chamber side; and a biasing means for urging the valve body to the closed side. A pressure regulator comprising: Flow resistance variable means for reducing the flow resistance of Pressure regulator, characterized in that digit. 2. The pressure regulator according to claim 1, wherein the flow path resistance varying means is capable of opening and closing an opening surface of the ventilation hole, and is configured to generate air when air flows out of the atmospheric pressure chamber to the outside. A valve body that is pushed to the open side by the flow and conversely pushed to the close side by the air flow when air enters the atmospheric pressure chamber from the outside, and a spring that biases the valve body to a position that closes the opening surface of the vent hole And a small-diameter flow path communicating the vent with the outside even when the valve element closes the opening of the vent. 3. A housing having a gas inlet passage and a gas outlet passage, a decompression chamber communicating with the gas outlet passage, a valve body capable of opening and closing a nozzle communicating the gas inlet passage and the decompression chamber, and a vent hole. An atmospheric pressure chamber through which air can flow in and out; a diaphragm that airtightly defines the decompression chamber and the atmospheric pressure chamber and that is displaced in accordance with a pressure difference between the two chambers; and a diaphragm that transmits the displacement of the diaphragm to a valve body. A displacement transmitting means for displacing the valve body to the closed side when displaced to the atmospheric pressure chamber side and displacing the valve body to the open side when the diaphragm is displaced to the decompression chamber side; and a biasing means for urging the valve body to the closed side. A pressure regulator having a biasing means, wherein the ventilation hole is provided with a ventilation means having a large number of small diameter holes.