JP2015197728A - Pressure governing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure governing device which is useful for general purposes and can obtain pressure-governing characteristics suitable for a working condition under which that it is actually used.SOLUTION: The pressure governing device comprises: a device body 1 having a primary side path 2 and a secondary side path 3 communicating with each other via a valve aperture 4, and including a diaphragm mechanism 5 for forming a diaphragm chamber 6 communicating with a secondary side path 3; a valve disc 16 for moving closer to and away from the valve aperture 4 and controlling the opening of the value aperture 4; and a link mechanism 17 for linking and coupling the valve disc 16 and the diaphragm mechanism 5, the valve disc 16 moving via the link mechanism 17 along with the movement of the diaphragm mechanism 5 caused by pressure fluctuations in the diaphragm chamber 6 and controlling the opening of the valve aperture 4. The link ratio of the link mechanism 17 is configured to be changeable.

Description

  The present invention includes a device main body having a primary side passage and a secondary side passage communicating with each other via a valve opening, and having a diaphragm mechanism that forms a diaphragm chamber communicating with the secondary side passage, A valve body that moves in a perspective direction with respect to the valve opening to control the opening of the valve opening, and a link mechanism that interlocks and connects the valve body and the diaphragm mechanism, the valve body having the diaphragm chamber The present invention relates to a pressure regulator that moves through the link mechanism in accordance with the movement of the diaphragm mechanism caused by the pressure fluctuation of the valve and controls the opening of the valve opening.

  Such a pressure regulating device is normally linked to the valve opening through the movement of the primary and secondary passages that communicate with each other via the valve opening, the diaphragm mechanism that forms the diaphragm chamber, and the movement of the diaphragm mechanism. On the other hand, it is equipped with a valve body that moves in the perspective direction to control the opening of the valve opening, and by controlling the opening of the valve opening by the valve body, the pressure in the secondary side passage (secondary pressure) There is also known a configuration in which the valve body and the diaphragm mechanism are interlocked and connected by a link mechanism (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-325028

According to the pressure regulating device described in the above-mentioned patent document, the movement amount (displacement amount) of the diaphragm mechanism due to the pressure fluctuation in the diaphragm chamber is transmitted to the valve body through the link mechanism, and the valve body moves, so that the diaphragm The valve opening is controlled by moving (displaced) by an amount commensurate with the displacement of the mechanism.
In this case, for example, if “the amount of displacement of the valve / the amount of displacement of the diaphragm mechanism” is large, even if the secondary side pressure slightly changes, the valve opening rapidly opens or closes rapidly. In other words, so-called hunting occurs, which greatly affects pressure regulation characteristics (variation characteristics of the secondary pressure with respect to the flow rate).
In this case, for example, when the valve opening opens excessively with respect to a slight decrease in the secondary pressure, there arises a disadvantage that the secondary pressure is excessively increased.

  Thus, “the amount of displacement of the valve / the amount of displacement of the diaphragm mechanism”, in other words, the link ratio of the link mechanism that interlocks the valve body and the diaphragm mechanism is closely related to the pressure regulating characteristics of the pressure regulating device. However, in the pressure regulator described in the above-mentioned patent document, the link ratio is fixed. For example, it is desired to obtain desired pressure regulation characteristics in an actual site where the flow range required for the pressure regulator is specified. Even in this case, there are few pressure regulators with pressure regulation characteristics suitable for the site, and it is not very versatile in actual implementation, and the usage conditions such as the flow rate range and pressure regulation range are limited. There is a drawback that it is difficult to obtain a pressure regulating device having suitable pressure regulating characteristics.

  The present invention pays attention to such a conventional problem, and its purpose is to provide a pressure regulating device having versatility and capable of obtaining pressure regulating characteristics suitable for use conditions in actual use. Is to provide.

To achieve the above object, a pressure regulator according to the present invention has a primary side passage and a secondary side passage communicating with each other through a valve opening, and forms a diaphragm chamber communicating with the secondary side passage. An apparatus main body that houses a diaphragm mechanism, a valve body that moves in a perspective direction with respect to the valve opening to control the opening of the valve opening, and a link mechanism that interlocks and connects the valve body and the diaphragm mechanism And the valve body moves through the link mechanism in accordance with the movement of the diaphragm mechanism due to the pressure fluctuation of the diaphragm chamber, and controls the opening of the valve opening. And
The characteristic configuration is that the link ratio of the link mechanism can be changed and set.

According to the above-described characteristic configuration, the link ratio of the link mechanism that interlocks and connects the valve body and the diaphragm mechanism is configured to be changeable. The amount / displacement amount of the diaphragm mechanism "can be set freely.
Therefore, it has versatility that can handle pressure regulation of various fluids with different flow rate ranges and pressure regulation ranges, and in actual use, set pressure regulation characteristics suitable for the flow rate range and pressure regulation range to be used. Thus, the desired pressure regulation effect can be obtained.

  According to a further feature of the pressure regulating device according to the present invention, the link mechanism includes a rack linked to the diaphragm mechanism, a pinion engaged with the rack, and a valve side link member linked to the valve body. A plurality of pin insertion holes for inserting and fixing pins to either one of the valve side link member and the pinion are provided with different distances or rotational phases from the rotation center of the pinion, and the other A plurality of pin sliding slots that allow sliding of the pins in a state where the pins are inserted are provided corresponding to the plurality of pin insertion holes, The link ratio of the link mechanism is changed and set by selecting any one and inserting and fixing the pin.

  According to the above characteristic configuration, a plurality of pin insertion holes provided in any one of the valve side link member and the pinion are appropriately selected, and the pins are inserted and fixed in the selected pin insertion holes, and the other Link of a link mechanism constituted by a rack, a pinion, a valve side link member, and the like by inserting the pin into a corresponding pin sliding long hole among the plurality of pin sliding long holes provided in The ratio can be changed and set freely.

  The pressure regulating device according to the present invention is further characterized in that the link mechanism includes a diaphragm side link member linked to the diaphragm mechanism, a valve side link member linked to the valve body, and the valve side link member. An intermediate link member that interlocks and connects the diaphragm side link member and rotates around a pivot shaft, and the link ratio of the link mechanism is changed and set by changing the position of the pivot shaft of the intermediate link member Is in the point to be.

  According to the above characteristic configuration, by changing the position of the pivot shaft of the intermediate link member that rotates by interlockingly connecting the valve side link member and the diaphragm side link member, the diaphragm side link member, the valve side link member, and The link ratio of the link mechanism constituted by the intermediate link member or the like can be freely changed and set.

  A further characteristic configuration of the pressure regulating device according to the present invention is that a pivot shaft holding member that holds the pivot shaft extends through the device main body to the outside of the device main body, and from the outside of the device main body. The position of the pivot shaft is changed by operating the pivot shaft holding member.

  According to the above characteristic configuration, the position of the pivot shaft of the intermediate link member can be changed by operating the pivot shaft holding member from the outside of the device body, and the change ratio setting of the link mechanism can be changed. Can be easily performed from the outside.

  A further characteristic configuration of the pressure regulating device according to the present invention is that the moving direction of the diaphragm mechanism and the moving direction of the valve body are orthogonal to each other.

  According to the above characteristic configuration, it is suitable for configuring a pressure regulating device in which the primary side passage and the secondary side passage are arranged in the vertical direction. For example, the pressure regulating device is arranged in the vertical direction (vertical direction). It can be easily connected to an open conduit.

  A further characteristic configuration of the pressure regulating apparatus according to the present invention is that the moving direction of the diaphragm mechanism and the moving direction of the valve body are parallel to each other.

  According to the above characteristic configuration, it is suitable for constituting a pressure regulating device in which the primary side passage and the secondary side passage are arranged in the horizontal direction. For example, the pressure regulating device is arranged in the horizontal direction (horizontal direction). It can be easily connected to an open conduit.

Longitudinal front view showing schematic configuration of pressure regulator Front view showing details of essential parts of pressure regulator The front view which shows the detail of the principal part of the pressure regulating apparatus by another embodiment The front view which shows the detail of the principal part of the pressure regulating apparatus by another embodiment Detailed view and chart of main parts for explaining performance characteristics of pressure regulator

An embodiment of a pressure regulator according to the present invention will be described with reference to the drawings.
The pressure regulator of the present invention is, for example, attached to a city gas conduit, and is used to depressurize high-pressure gas on the upstream side and supply it to the downstream side. As shown in FIG. A primary passage 2 connected to an upstream conduit (not shown) arranged in the vertical direction, and a secondary connected to a downstream conduit (not shown) also arranged in the vertical direction The side passage 3 is provided, and the primary side passage 2 and the secondary side passage 3 are communicated with each other via a circular valve port 4 as a valve opening that opens in the lateral direction.
The apparatus main body 1 is equipped with a diaphragm mechanism 5 in a state of being located laterally of the primary side passage 2 and the secondary side passage 3, and a lower chamber 6 serving as a diaphragm chamber located below and an upper portion located above. The chamber 7 is partitioned.

The lower chamber 6 as a diaphragm chamber communicates with the secondary side passage 3 through a plurality of communication holes 8, and the upper chamber 7 is maintained at atmospheric pressure by the atmospheric opening 9. A compression spring 10 is provided for pushing down the diaphragm mechanism 5 downward.
As shown in detail in FIG. 2, the diaphragm mechanism 5 is provided with a rack 11, the rack 11 is provided so as to move up and down along its longitudinal direction, and a pinion 12 that meshes with the rack 11 is provided. The pinion 12 is held by the apparatus main body 1 in a state of being located in the lower chamber 6 via a rotation shaft 13 as a rotation center.
A valve-side link member 14 connected to the valve body 16 is linked to the pinion 12 by a pin 15, and a link mechanism 17 is configured by the valve-side link member 14, the rack 11, the pinion 12, and the like.

The link mechanism 17 interlocks and connects the diaphragm mechanism 5 (rack 11) that moves in the vertical direction and the valve body 16 (valve-side link member 14) that moves in the horizontal direction, and the valve body 16 changes the pressure in the lower chamber 6. Accordingly, it moves in the lateral direction via the diaphragm mechanism 5 and the link mechanism 17, that is, moves in the perspective direction with respect to the valve port 4 to control the opening degree of the valve port 4 from the secondary side passage 3 side. It is configured as follows.
A plurality (four in this embodiment) of pin insertion holes 12a, 12b1, 12b2, and 12c for inserting and fixing the pins 15 are provided at the center of rotation of the pinion 12 in the pinion 12 constituting the link mechanism 17. A plurality (three in this embodiment) that are provided with different distances or rotational phases from a certain rotary shaft 13 and allow the valve-side link member 14 to slide the pin 15 in a state where the pin 15 is inserted. Are provided corresponding to the respective pin insertion holes 12a, 12b1, 12b2, and 12c. That is, the pin sliding long hole 14a is provided in the pin insertion hole 12a, the pin sliding long hole 14b is provided in the pin insertion holes 12b1 and 12b2, and the pin sliding long hole 14c is provided in correspondence with the pin insertion hole 12c. ing.

Then, one of the plurality of pin insertion holes 12a, 12b1, 12b2, 12c is selected and the pin 15 is inserted and fixed, and the pin 15 is inserted into the corresponding pin sliding long holes 14a, 14b, 14c. Thus, the distance or rotational phase between the rotating shaft 13 and the pin 15 is changed, and the link ratio of the link mechanism 17 is changed and set. Here, the pin insertion holes 12a, 12b1, and 12c change the distance between the rotary shaft 13 and the pin 15, and the pin insertion holes 12a and 12b2 change the rotational phase of the pin 15.
The number of pin insertion holes 12a, 12b1, 12b2, and 12c provided in the pinion 12 and the number of pin sliding long holes 14a, 14b, and 14c provided in the valve side link member 14 are particularly the former four and the latter The number is not limited to three, and an arbitrary number of two or more can be selected and set.

5A and 5B showing an enlarged view of the pinion 12 and the amount of gas flowing through the secondary side passage (Q ) And the vertical axis indicates the secondary pressure (P2).
4 types of characteristic curves “A”, “B1”, “B2”, “C” shown in FIG. 5C and the link ratio of the link mechanism 17 (the pin insertion holes 12a, 12b1, 12b2, 12c to be selected) The characteristic curve of the pin insertion hole 12a is “A”, the pin insertion hole 12b1 is “B1”, the pin insertion hole 12b2 is “B2”, and the pin insertion hole 12c is “C”. Corresponding to Accordingly, in FIG. 5 (c), the corresponding pin insertion hole symbols are appended to the characteristic curves “A”, “B1”, “B2”, and “C”.
Here, the positions of the pin insertion holes 12a, 12b1, 12b2, and 12c shown in FIG. 5A (the same as FIG. 2) are positions when the valve opening 4 is in a fully closed state. The closed state is adjusted by the pressing force of the compression spring 10 that presses the diaphragm mechanism 5, the adjustment of the occlusal position of the rack 11 with respect to the pinion 12, and the like. Further, in FIG. 5B, the positions of the pin insertion holes 12a, 12b1, 12b2, and 12c in the fully opened state after movement are indicated by solid lines (the broken lines are the positions of the fully closed state).

Basically, in the case where a pressure regulator equivalent to the pin insertion hole 12a is selected, if the pin insertion hole 12b1 is selected in the direction in which the opening amount of the valve opening 4 is reduced, As shown by the curve “B1”, the behavior of the pressure regulator can be changed to the side where the secondary flow pressure (P2) on the large flow rate side decreases.
When the pin insertion hole 12c is selected so that the opening amount of the valve opening 4 is further reduced, the secondary pressure (P2) on the large flow rate side decreases more quickly as shown by the characteristic curve “C”. In addition, the behavior of the pressure regulator can be changed.
On the other hand, when the pin insertion hole 12b2 that increases the opening amount of the valve opening 4 is selected, as shown in the characteristic curve “B2”, a decrease in the secondary pressure (P2) on the large flow rate side is suppressed. On the side, the behavior of the pressure regulator can be changed.

[Another embodiment]
Next, although another embodiment will be described, the components described in the previous embodiment and the components having the same action are denoted by the same reference numerals, the description thereof will be omitted, and mainly the configuration different from the previous embodiment. explain.

(1) In the previous embodiment, the example in which the link mechanism 17 is configured by the rack 11, the pinion 12, the valve side link member 14, and the like has been shown. However, as shown in FIG. The link mechanism 17 can also be constituted by the diaphragm side link member 18, the L-shaped intermediate link member 19 interlocked with the diaphragm side link member 18, the valve side link member 20 connected to the valve body 16, and the like.
In this alternative embodiment, in the L-shaped intermediate link member 19, the portion near the intersection of the long link portion and the short link portion is pivotally supported by the pivot shaft 21, and the shorter link is provided. A pin 20a protruding from the valve side link member 20 is inserted into a pin sliding long hole 19a provided in the portion, and the intermediate link member 19 and the valve side link member 20 are interlockedly connected.

A pivot shaft 21 that pivotally supports the intermediate link member 19 is attached to one end of a pivot shaft holding member 22 that is slidably penetrated with respect to the apparatus main body 1, and the other end of the pivot shaft holding member 22. The part is provided with a male screw 22 a and extends to the outside of the apparatus main body 1.
A link ratio adjusting nut 23 positioned outside the apparatus main body 1 is screwed into the other end of the pivot shaft holding member 22 extending outside the apparatus main body 1, that is, the male screw 22a. The nut 23 is prevented from moving in the axial direction of the pivot shaft holding member 22 by a nut movement preventing member 24 that protrudes from the apparatus main body 1 and contacts the nut 23, and the pivot shaft holding member with respect to the apparatus main body 1 is prevented. An O-ring 25 for maintaining airtightness is disposed at a through portion of 22.
According to this alternative embodiment, by rotating the nut 23 from the outside of the apparatus main body 1, the pivot shaft 21 attached to the pivot shaft holding member 22 is repositioned in the vertical direction. The distance between the support shaft 21 and the pin 20a is changed, and the link ratio of the link mechanism 17 is changed and set.

(2) Further, as shown in FIG. 4, the diaphragm side link member 18 connected to the diaphragm mechanism 5, the linear intermediate link member 26 linked to the diaphragm side link member 18, and the valve body 16 are connected. A valve mechanism 16 (valve-side link member 20) that moves in the same direction as the diaphragm mechanism 5 (diaphragm-side link member 18) that moves in the up-and-down direction is configured. It can also be linked.
In this other embodiment, the diaphragm side link member 18 and the intermediate link member 26 are interlocked and connected by the pin 26b, and the intermediate link member 26 and the valve side link member 20 are interlocked and connected by the pin 26c, so that the linear intermediate link member 26 is connected. Is provided with a long hole 26a for pivot shaft sliding along the longitudinal direction, and the pivot shaft 21 attached to one end of the pivot shaft holding member 27 is slidable in the long hole 26a. Has been inserted.

The pivot shaft holding member 27 is formed in an L shape, and the pivot shaft 21 is attached to one end portion thereof, and a male screw 27 a is provided at the other end portion thereof, and extends to the outside of the apparatus main body 1. ing.
As with the other embodiment of FIG. 3, a nut 23 for adjusting the link ratio is screwed to the male screw 27 a of the pivot shaft holding member 27 located outside the apparatus main body 1, and pivotally supported by the nut movement prevention member 24. The shaft holding member 27 is prevented from moving in the axial direction, and an O-ring 25 is provided at a location where the pivot shaft holding member 27 penetrates the apparatus main body 1.
According to this other embodiment, by rotating the nut 23 from the outside of the apparatus main body 1, the position of the pivot shaft 21 with respect to the pivot shaft sliding slot 26a of the intermediate link member 26 is changed. The distance from the pivot shaft 21 to the pin 26b and the distance from the pivot shaft 21 to the pin 26c are changed, and the link ratio of the link mechanism 17 is changed and set.

(3) In the embodiment of FIG. 2 and another embodiment of FIG. 3, the moving direction of the diaphragm mechanism 5 (the rack 11 or the diaphragm side link member 18) and the moving direction of the valve body 16 (the valve side link member 14 or 20) are Are configured in a direction orthogonal to each other. For example, a bevel gear or the like is interposed between the diaphragm mechanism 5 and the diaphragm side link member 18 or between the valve body 16 and the valve side link members 14 and 20. It is also possible to link them so that the moving direction of the diaphragm mechanism 5 and the moving direction of the valve body 16 are parallel to each other.
In that case, the primary side passage 2 and the secondary side passage 3 are arranged in the lateral direction instead of the pressure regulator (see FIG. 1) in which the primary side passage 2 and the secondary side passage 3 are arranged in the vertical direction. It is preferable to apply to the pressure regulator (refer patent document 1) made.
On the other hand, in another embodiment of FIG. 4, the diaphragm mechanism 5 and the diaphragm side link member 18 or the valve body 16 and the valve side link member 20 are interlocked with each other by interposing a bevel gear or the like. The moving direction of the mechanism 5 and the moving direction of the valve body 16 can also be configured to be orthogonal to each other. In this case, the primary side passage 2 and the secondary side passage 3 are arranged in the vertical direction. It is preferable to apply to a pressure regulator.
The pressure regulator of the present invention is not particularly limited to city gas, but can be applied to various gases other than city gas, and further to various liquids including clean water.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Primary side channel | path 3 Secondary side channel | path 4 Valve opening part 5 Diaphragm mechanism 6 Diaphragm chamber 11 Rack 12 Pinion 12a, 12b1, 12b2, 12c Pin insertion hole 13 Pinion rotation center 14 Valve side link member 14a, 14b , 14c Pin sliding long hole 15 Pin 16 Valve body 17 Link mechanism 18 Diaphragm side link member 19, 26 Intermediate link member 20 Valve side link member 21 Pivoting shaft 22, 27 Pivoting shaft holding member

Claims (6)

An apparatus main body having a primary side passage and a secondary side passage communicating with each other via a valve opening, and having a diaphragm mechanism forming a diaphragm chamber communicating with the secondary side passage; and the valve opening In contrast, a valve body that moves in the perspective direction to control the opening of the valve opening, and a link mechanism that interlocks and connects the valve body and the diaphragm mechanism, the valve body responds to pressure fluctuations in the diaphragm chamber. A pressure regulator that moves through the link mechanism to control the opening of the valve opening in accordance with the movement of the diaphragm mechanism caused by the diaphragm mechanism,
A pressure regulator configured such that the link ratio of the link mechanism can be changed and set.   The link mechanism includes a rack interlocked with the diaphragm mechanism, a pinion meshing with the rack, and a valve-side link member interlocked with the valve body, and either the valve-side link member or the pinion A plurality of pin insertion holes for inserting and fixing a pin on one side are provided at different distances or rotational phases from the rotation center of the pinion, and the pin slides with the pin inserted on the other side. And a plurality of pin sliding long holes are provided corresponding to the plurality of pin insertion holes, and the pin is inserted and fixed by selecting one of the plurality of pin insertion holes. The pressure regulating device according to claim 1, wherein the link ratio of the link mechanism is changed and set.   The link mechanism includes a diaphragm-side link member linked to the diaphragm mechanism, a valve-side link member linked to the valve body, and a pivot shaft that links the valve-side link member and the diaphragm-side link member. The pressure regulating device according to claim 1, further comprising: an intermediate link member that rotates around, wherein the link ratio of the link mechanism is changed by changing a position of the pivot shaft of the intermediate link member.   A pivot shaft holding member that holds the pivot shaft extends through the apparatus main body to the outside of the apparatus main body, and operates the pivot shaft holding member from the outside of the apparatus main body to operate the pivot support. The pressure regulating device according to claim 3, wherein the position of the shaft is changed.   The pressure regulating device according to any one of claims 1 to 4, wherein a moving direction of the diaphragm mechanism and a moving direction of the valve body are orthogonal to each other.   The pressure regulating device according to any one of claims 1, 3, and 4, wherein a moving direction of the diaphragm mechanism and a moving direction of the valve body are parallel to each other.

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