JP2013036560A - Pressure regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure regulator capable of preventing the pressure of fuel gas supplied from an LP gas container from being recognized to be less than a designated value.SOLUTION: The pressure regulator 1 includes a display 18 rotated when a medium pressure diaphragm 11 is displaced to a medium pressure pressure-reducing chamber 7 side at a designated distance or more and continuously forming a red portion 18b and a blue portion 18c along a rotating direction, and a display window 19 made of a member capable of viewing the inside from the outside and arranged on an upper housing 3 at a position opposite to the display 18. The blue portion 18c is opposite to the display window 19 when the display 18 is not rotated while the medium pressure diaphragm 11 is not displaced to the medium pressure pressure-reducing chamber 7 side at a designated distance or more and when the display 18 is rotated while the red portion 18b is opposite to the display window 19 and the medium pressure diaphragm 11 is displaced to the medium pressure pressure-reducing chamber 7 side at a designated distance or more.

Description

  The present invention relates to a pressure regulator.

  Conventionally, a pressure regulator has been proposed in which fuel gas from a plurality of LP gas containers is depressurized to a predetermined pressure and supplied to a consumption side (for example, each household). The pressure regulator is configured to be switchable so that fuel gas is supplied from another LP gas container when the pressure of the fuel gas from the LP gas container becomes less than a predetermined value.

  Such an adjuster is provided with a display mechanism for displaying the fact to the outside when the pressure of the fuel gas from the LP gas container becomes less than a predetermined value. Specifically, the display mechanism displays red from the display window when the pressure of the fuel gas from one LP gas container becomes less than a predetermined value, and the pressure of the fuel gas from one LP gas container is equal to or higher than the predetermined value. In some cases, a transparent color is displayed. For this reason, when the display from the display window is red, an operator or the like operates the switching lever 180 degrees so that the fuel gas is supplied from the other LP gas container. The LP gas container will be replaced (for example, see Patent Documents 1 to 3).

JP 2006-56371 A JP-A-10-238651 Japanese Unexamined Patent Publication No. 7-78033

  However, since the pressure regulators described in Patent Documents 1 to 3 display a transparent color when the pressure of the fuel gas from the LP gas container is equal to or higher than a predetermined value, there is a problem that it is difficult for an operator or the like to visually recognize. Specifically, because the colors of various objects are reflected in the lens used for the display window, it is difficult to visually recognize the transparent color, and in some cases red objects existing in the surroundings are reflected in the lens, etc. If the pressure of the fuel gas from the LP gas container is less than a predetermined value, it is erroneously recognized.

  The present invention has been made to solve such a conventional problem, and the object of the invention is to erroneously recognize that the pressure of the fuel gas from the LP gas container is less than a predetermined value. An object of the present invention is to provide a pressure regulator that can prevent this.

  The pressure regulator of the present invention is to supply the consumer side after reducing the fuel gas from the LP gas container to a predetermined pressure, and a decompression chamber for introducing the fuel gas from the LP gas container; A diaphragm separating the atmospheric pressure chamber communicating with the outside, and when the diaphragm is displaced to the decompression chamber side by a predetermined distance or more, the diaphragm is rotated, and a red portion and a blue portion are continuously formed along the rotation direction. And a display window provided on the switching lever at a position facing the display, and the display is configured such that the diaphragm is displaced to the decompression chamber side by a predetermined distance or more. The blue part faces the display window in a non-rotating state and the diaphragm is displaced by a predetermined distance or more to the decompression chamber side and the red part faces the display window in the rotated state. To.

  According to this pressure regulator, the decompression chamber introduces the fuel gas from the LP gas container. Here, the fuel gas from the LP gas container has a high pressure. For this reason, when the amount of gas in the LP gas container is sufficient, the diaphragm is not displaced more than a predetermined distance to the decompression chamber side, and otherwise, is displaced more than a predetermined distance. In addition, the display rotates when the diaphragm is displaced to the decompression chamber side by a predetermined distance or more. Therefore, the display does not rotate when the amount of gas in the LP gas container is sufficient, and rotates when it is not. It becomes.

  In the display, the blue portion faces the display window when the display is not rotated, and the red portion faces the display window when the display is rotated. For this reason, when the amount of gas in the LP gas container is sufficient, blue is visually recognized from the display window, and red is otherwise visually recognized.

  Thus, according to the present invention, when the amount of gas in the LP gas container is sufficient, blue is visually recognized, and is affected by the reflection of surrounding objects as compared with the case of a transparent color. It is difficult to prevent erroneous recognition that the pressure of the fuel gas from the LP gas container is less than a predetermined value.

  According to the pressure regulator of the present invention, it is possible to prevent erroneous recognition that the pressure of the fuel gas from the LP gas container is less than a predetermined value.

It is an external view of the pressure regulator which concerns on this embodiment. It is AA sectional drawing of the pressure regulator shown in FIG. It is BB sectional drawing of the pressure regulator shown in FIG.

  Hereinafter, embodiments of the pressure regulator according to the present invention will be described.

  FIG. 1 is an external view of a pressure regulator according to this embodiment, and FIG. 2 is a cross-sectional view of the pressure regulator shown in FIG. 3 is a cross-sectional view of the pressure regulator shown in FIG. 1 taken along the line BB. The pressure regulator 1 according to the present embodiment is for reducing the fuel gas from the LP gas container to a predetermined pressure and supplying it to the consumer side (combustor such as a gas range).

  The pressure regulator 1 includes a lower housing 2 and an upper housing 3, which are assembled to form a housing. The lower housing 2 is formed with two gas inlet channels 4 a and 4 b and a gas outlet channel 5. The gas inlet channels 4a and 4b are channels that are connected to different LP gas containers and introduce high-pressure gas from the LP gas containers. The gas outlet channel 5 is a channel that is formed in a direction orthogonal to the gas inlet channels 4a and 4b and supplies the fuel gas decompressed by the pressure regulator 1 to, for example, a gas meter.

  Specifically, the pressure regulator 1 includes a medium-pressure decompression unit 6 that decompresses, for example, a high pressure gas of 0.1 to 1.56 MPa introduced from the gas inlet channels 4a and 4b to about 0.06 MPa, and Furthermore, the low pressure decompression part 20 which decompresses to about 2.55-3.3kPa is provided.

  The intermediate pressure reducing section 6 includes an intermediate pressure reducing chamber 7, an atmospheric pressure chamber 8, an intermediate pressure spring 9, an intermediate pressure diaphragm receiving plate 10, an intermediate pressure diaphragm 11, a bearing member 12, a switching shaft 13, An upper bearing member 14, a switching lever 15, a pressing member 16, and an intermediate pressure valve 17 are provided.

  The intermediate pressure decompression chamber 7 is a portion that is formed between the lower housing 2 and the upper housing 3 and temporarily holds the high-pressure gas introduced from the gas inlet channels 4a and 4b. The atmospheric pressure chamber 8 is a portion where the inside becomes an atmospheric pressure by communicating with the outside.

  The intermediate pressure diaphragm 11 has a peripheral edge sandwiched and fixed between the lower housing 2 and the upper housing 3, and airtightly separates the intermediate pressure decompression chamber 7 and the atmospheric pressure chamber 8. The intermediate pressure diaphragm 11 is urged toward the intermediate pressure decompression chamber 7 by the intermediate pressure spring 9 through the intermediate pressure diaphragm receiving plate 10.

  The bearing member 12 is coaxially fixed to the axial center portion of the intermediate pressure diaphragm 11. The switching shaft 13 is a member inserted into the bearing member 12 and is rotatable in a plane (hereinafter simply referred to as a plane) perpendicular to the axial direction (hereinafter simply referred to as the axial direction) of the bearing member 12. The switching shaft 13 is fixed in the axial direction with respect to the bearing member 12, and moves in the axial direction together with the intermediate pressure diaphragm 11 as the gas pressure in the intermediate pressure reducing chamber 7 varies. . Under such a switching shaft 13, an intermediate pressure valve 17 that acts on the basis of rotation in the plane of the switching shaft 13 and adjusts the inflow of gas from the two gas inlet channels 4 a and 4 b to the intermediate pressure decompression chamber 7. Is arranged.

  The upper bearing member 14 is formed so as to surround the upper portion of the switching shaft 13, and rotatably supports the upper portion of the switching shaft 13, and includes a cylindrical portion 14a, a flange portion 14b, and a claw portion 14c. Have. The cylinder part 14 a is a part that covers the upper part of the switching shaft 13. The flange portion 14b is a flange extending in the planar direction. The claw portion 14c is a portion that is locked to the upper housing 3 side. Such an upper bearing member 14 is in a fixed state by sandwiching a part of the upper housing 3 (a portion extending inward of the upper housing) by the flange portion 14b and the claw portion 14c.

  Further, the upper bearing member 14 is formed with a pipe portion 14d extending in the axial direction. A through hole 14e penetrating from the atmospheric pressure chamber 8 to above the pipe portion 14d is formed in the cylinder portion 14a and the pipe portion 14d. Thereby, the atmospheric pressure chamber 8 communicates with the outside.

  The switching lever 15 can be rotated 180 degrees in the plane at the upper part of the upper housing 3. The pressing member 16 is provided in a fixed state at the axial center of the intermediate pressure diaphragm 11 and rotates with the rotation of the switching lever 15. Moreover, the pressing member 16 has the recessed part 16a and the convex part 16b. The concave portion 16a is a portion that is recessed toward the upper housing 3 side, and the convex portion 16b is a portion that protrudes toward the lower housing 2 side. When the switching lever 15 is rotated 180 degrees, the positions of the concave portion 16a and the convex portion 16b are interchanged, and the contact relationship with the rod-like member 17a extending from the intermediate pressure valve 17 is changed. That is, in the example shown in FIG. 3, the rod-shaped member 17a extending from the intermediate pressure valve 17 on the gas inlet 4a side and the convex portion 16b are in contact with each other, but by rotating the switching lever 15 180 degrees, the convex portion 16b is Then, it comes into contact with the rod-shaped member 17a extending from the intermediate pressure valve 17 on the gas inlet 4b side.

  The low-pressure decompression unit 20 includes a low-pressure decompression chamber 21, an atmospheric pressure chamber 22, a low-pressure spring 23, a low-pressure diaphragm receiving plate 24, a low-pressure diaphragm 25, an operating rod 26, a spring receiving washer 27, and a safety valve adjusting spring 28. And an opening / closing lever 29, a pin 30, a low-pressure valve 31, and a nozzle portion 32.

  The low-pressure decompression chamber 21 is a part that is formed between the lower housing 2 and the upper housing 3 and temporarily holds the medium-pressure gas introduced from the medium-pressure decompression unit 6. The atmospheric pressure chamber 22 is a portion where the inside becomes an atmospheric pressure by communicating with the outside.

  The periphery of the low pressure diaphragm 25 is sandwiched and fixed between the lower housing 2 and the upper housing 3, and the low pressure decompression chamber 21 and the atmospheric pressure chamber 22 are hermetically separated. The low pressure diaphragm 25 is urged toward the low pressure decompression chamber 21 by the low pressure spring 23 via the low pressure diaphragm receiving plate 24.

  The operating rod 26 is a member that extends through the center of the low-pressure diaphragm 25 in the axial direction. An opening / closing lever 29 is provided at the tip of the low-pressure decompression chamber 21 side. A pin 30 is provided at the tip of the opening / closing lever 29 (the tip on the opposite side of the operating rod 26). For this reason, the opening / closing lever 29 is rotatable around the pin 30.

  Further, a low pressure valve 31 is provided at the more distal end of the opening / closing lever 29. The low pressure valve 31 operates so as to open and close the nozzle portion 32 provided between the intermediate pressure decompression chamber 7 and the gas outlet flow path 5 in accordance with the rotation of the opening / closing lever 29.

  A spring receiving washer 27 is provided at the tip of the operating rod 26 on the atmospheric pressure chamber 22 side. A safety valve adjusting spring 28 is interposed between the spring receiving washer 27 and the low pressure diaphragm 25. The safety valve adjustment spring 28 always urges the valve body 26a of the safety valve formed integrally with the lower end of the operating rod 26 in a direction in which the valve body receiver 33 is disposed on the lower side of the low pressure diaphragm 25.

  A cap 34 is provided on the upper portion of the operating rod 26 in the upper housing 3. The cap 34 has a waterproof structure that allows the atmospheric pressure chamber 22 and the external space to communicate with each other and prevents intrusion of water droplets and the like.

  Further, in the present embodiment, the pressure regulator 1 includes a display 18, a display window 19, and a display spring S. The display 18 is a member that is supported by the collar portion 14b and is rotatable about the support location. The display 18 includes a rod-shaped shaft portion 18a, a red portion 18b, and a blue portion 18c. The red portion 18b is provided at the tip of the shaft portion 18a, and the blue portion 18c is extended in a direction extending from the red portion 18 in the rotation direction. For this reason, the display 18 has a red portion 18b and a blue portion 18c formed continuously along the rotation direction.

  The display window 19 is made of a transparent resin material, and is provided in a notch portion in which a part of the switching lever 15 is notched. An operator or the like can visually recognize the display 18 from the outside of the switching lever 15 through the display window 19.

  The display spring S is a coil spring provided in a compressed state between the collar portion 14 b and the display 18. In detail, a shaft member is provided in the coil of the display spring S and is supported by the flange portion 14b. One end side of the coil is in contact with the flange portion 14b, and the other end side of the coil is in contact with the display 18. Such a display spring S does not rotate the display 18 in the compressed state, and the display 18 is stopped at the position shown in FIG. On the other hand, when the compression state of the display spring S is released, the display 18 is rotated in the arrow direction shown in FIG.

  Next, the operation of the pressure regulator 1 according to this embodiment will be described. First, when gas is used on the consumer side, the pressure in the intermediate pressure decompression chamber 7 is reduced. As a result, the intermediate pressure diaphragm 11 is displaced toward the lower housing 2 by the biasing force of the intermediate pressure spring 9. And one rod-shaped member 17a is pushed down to the lower housing 2 side by the convex part 16b. As a result, the intermediate pressure valve 17 on the side of one gas inlet channel 4a (4b) is operated to open one gas inlet channel 4a, and the high pressure gas from the LP gas container is introduced into the intermediate pressure decompression chamber 7. The other rod-like member 17a is not pushed down by the recess 16a, the intermediate pressure valve 17 on the other gas inlet channel 4b (4a) side does not operate, and the other gas inlet channel 4b is not opened.

  When the pressure in the intermediate pressure decompression chamber 7 is increased by the inflow of the high pressure gas, the intermediate pressure diaphragm 11 is displaced toward the upper housing 2 against the biasing force of the intermediate pressure spring 9. Thereby, the intermediate pressure valve 17 moves to the upper housing 2 side together with the rod-shaped member 17a, and one gas inlet channel 4a is closed. Thereafter, when gas is used on the consumer side, the pressure in the intermediate pressure decompression chamber 7 is reduced, and the above operation is repeated.

  Further, when the amount of gas in the LP gas container connected to the one gas inlet channel 4a (4b) side decreases, the pressure in the intermediate pressure decompression chamber 7 does not increase. In this case, the intermediate pressure diaphragm 11 is further displaced toward the lower housing 2 side by the urging force of the intermediate pressure spring 9 (is displaced by a predetermined distance or more). As a result, the recess 16a comes into contact with the other rod-shaped member 17a and is pushed down, so that high-pressure gas flows from the LP gas container connected to the other gas inlet channel 4b (4a).

  Further, in the low pressure decompression unit 20, the gas in the low pressure decompression chamber 21 is decompressed by using gas on the consumer side. Thereby, the low pressure diaphragm 25 is displaced to the lower housing 2 side by the biasing force of the low pressure spring 23. Then, the opening / closing lever 29 rotates counterclockwise in the figure with the pin 30 as a fulcrum. By this rotation, the low pressure valve 31 moves in the right direction in the figure and opens the low pressure nozzle 32. Thereby, the gas on the intermediate pressure decompression chamber 7 side flows to the gas outlet channel 5 side.

  On the other hand, when the pressure in the low-pressure decompression chamber 21 rises, the low-pressure diaphragm 25 is displaced toward the upper housing 3 against the urging force of the low-pressure spring 23, and the low-pressure valve 31 moves to the left in the figure. Thereby, the flow path of the low pressure nozzle 32 is closed, and the inflow of gas into the low pressure decompression chamber 21 is controlled. Thereafter, when gas is used on the consumer side, the pressure in the low-pressure decompression chamber 21 is reduced, and the above operation is repeated.

  When the pressure in the low-pressure decompression chamber 21 exceeds a predetermined pressure and becomes abnormally high, further movement of the low-pressure diaphragm 25 is blocked by the safety valve adjustment spring 28, and the valve body 26a of the safety valve is opened. The gas in the decompression chamber 21 is released to the outside through the atmospheric pressure chamber 22 and the vent hole.

  The display 18 operates as follows in accordance with the above operation. First, when the amount of gas in the LP gas container connected to the one gas inlet channel 4a (4b) side is sufficient and the high pressure gas flows into the intermediate pressure decompression chamber 7, the display spring S is in a compressed state. Is maintained. That is, the display 18 does not rotate, and the blue portion 18 c of the display 18 faces the display window 19. Therefore, the blue portion 18 c is visually recognized from the display window 19 by the worker or the like.

  In contrast, if the amount of gas in the LP gas container connected to one gas inlet channel 4a (4b) becomes insufficient, the LP gas connected to the other gas inlet channel 4b (4a) side. High pressure gas flows from the container into the medium pressure decompression chamber 7. In this case, the concave portion 16a comes into contact with the rod-shaped member 17a, and the intermediate pressure diaphragm 11 is slightly displaced toward the lower housing 2 (displaced by a predetermined distance or more). In this state, the display spring S rotates the display 18 by releasing the compressed state. Thereby, the red part 18 b of the display 18 faces the display window 19. Therefore, the red part 18b is visually recognized from the display window 19 by the worker or the like.

  In particular, in the present embodiment, when the amount of gas in the LP gas container connected to the one gas inlet channel 4a (4b) side is sufficient, the operator can visually recognize the blue portion 18c from the display window 19. It will be. For this reason, compared with the case where a transparent color is simply displayed, it is possible to reduce the possibility of surrounding objects moving into the display window 19 and misidentifying the color.

  Thus, according to the pressure regulator 1 according to the present embodiment, the intermediate pressure decompression chamber 7 introduces the fuel gas from the LP gas container. Here, the fuel gas from the LP gas container has a high pressure. For this reason, when the amount of gas in the LP gas container is sufficient, the intermediate pressure diaphragm 11 is not displaced more than a predetermined distance toward the intermediate pressure decompression chamber 7, and otherwise, is displaced more than a predetermined distance. In addition, the display 18 rotates when the intermediate pressure diaphragm 11 is displaced by a predetermined distance or more toward the decompression chamber side. Therefore, the display 18 does not rotate when the amount of gas in the LP gas container is sufficient. It will turn.

  In the display 18, the blue portion 18 c faces the display window 19 in a state where the display 18 is not rotated, and the red portion 18 b faces the display window 19 in a state where the display 18 is rotated. For this reason, when the amount of gas in the LP gas container is sufficient, blue is visually recognized from the display window 19, and red is visually recognized otherwise.

  As described above, according to this embodiment, when the amount of gas in the LP gas container is sufficient, blue is visually recognized, and the influence of reflection of surrounding objects is reduced as compared with the case of a transparent color. Therefore, it is possible to prevent erroneous recognition that the pressure of the fuel gas from the LP gas container is less than a predetermined value.

  As described above, the present invention has been described based on the embodiment, but the present invention is not limited to the above embodiment, and may be modified without departing from the gist of the present invention. That is, other functions may be added or certain functions may be excluded without departing from the spirit of the present invention. Furthermore, dimensions and the like are not limited to those illustrated.

DESCRIPTION OF SYMBOLS 1 Pressure regulator 2 Lower housing 3 Upper housing 4a, 4b Gas inlet flow path 5 Gas outlet flow path 6 Medium pressure decompression part 7 Medium pressure decompression chamber 8 Atmospheric pressure chamber 9 Medium pressure spring 10 Medium pressure diaphragm receiving plate 11 Medium pressure diaphragm 12 bearing member 13 switching shaft 14 upper bearing member 14a cylinder 14b collar 14c claw 14d pipe 15 switching lever 16 pressing member 16a recess 16b projection 17 intermediate pressure valve 17a rod-shaped member 18 display 18a shaft 18b red part 18c blue part DESCRIPTION OF SYMBOLS 19 Display window 20 Low pressure decompression part 21 Low pressure decompression room 22 Atmospheric pressure room 23 Low pressure spring 24 Low pressure diaphragm receiving plate 25 Low pressure diaphragm 26 Actuation rod 27 Spring receiving washer 28 Safety valve adjustment spring 29 Opening / closing lever 30 Pin 31 Low pressure valve 32 Nozzle part 33 Disc holder 34 S display spring

Claims (1)

A pressure regulator that supplies fuel to the consumer after depressurizing the fuel gas from the LP gas container to a predetermined pressure,
A diaphragm separating a decompression chamber for introducing fuel gas from the LP gas container and an atmospheric pressure chamber communicating with the outside;
When the diaphragm is displaced to the decompression chamber side by a predetermined distance or more, the display rotates, and a red part and a blue part are continuously formed along the turning direction;
It is composed of a member whose inside is visible from the outside, and includes a display window provided on the switching lever at a position facing the display,
In the display, when the diaphragm is not displaced to the decompression chamber side by a predetermined distance or more and is not rotated, the blue portion faces the display window, and the diaphragm has a predetermined distance or more by the decompression chamber side. A pressure regulator, wherein a red portion faces the display window in a displaced and rotated state.

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