JPH09210243A - Valve with opening/closing display function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display more directly and clearly an opening/closing condition of a diaphragm. SOLUTION: A metal-made diaphragm 12 is provided open/close movably relating to a valve seat 11 in a valve case 3. An opening/closing moving member M of a booster type actuator 2 is connected in series relating to this diaphragm 12. A display device A is constituted by a detector 41 detecting a moving amount in a vertical direction of the moving member M, pointer 42 supported to a casing 40 and a mechanism conversion magnifying the moving amount detected by the detector 41 into a rotary angle of the painter 42. When this display device A is mounted from an upper side in a housing 20 of the actuator 2 through a block 54, the detector 41 passes through a through hole 51 of a pressing bolt 37 into contact with an upper end face of the moving member M, 'close' is displayed by the painter 42. When the moving member M is lifted, the diaphragm 12 is opened, also the detector 41, is lifted, the painter 42 is large rotated, 'open' is displayed by this pointer 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve of a type in which a closing member is opened and closed by an actuator such as a fluid pressure cylinder, and more particularly to a valve provided with a function of displaying an open / closed state of the closing member.

[0002]

2. Description of the Related Art In this type of actuator type valve,
In some cases, the open / closed state of the closing member is displayed by detecting the supply / discharge state of the working fluid to / from the fluid pressure type actuator or by detecting the energized / de-energized state of the electric actuator.

[0003]

In the above prior art,
Since the open / close state is indirectly displayed via the supply / discharge state of the working fluid, the actual open / close state of the closing member cannot be grasped. An object of the present invention is to enable the open / closed state of the closing member to be displayed more directly and clearly.

[0004]

In order to achieve the above object, the present invention provides a valve with an open / close display function as follows, as shown in FIGS. 1 to 3, 4 or 5, for example. It is composed. The closing member 12 is provided in the valve box 3 so as to be capable of opening and closing in a substantially vertical direction with respect to the valve seat 11, and the opening and closing moving member M of the actuator 2 is connected in series to the closing member 12 so that the closing member 12 is An indicator A for displaying the open / closed state is configured to be supported by the housing 20 of the actuator 2, and the indicator A is used for detecting the movement amount of the moving member M in the linear direction, and the housing 20. And a transmission means 4 for transmitting the detection amount of the detector 41 to the display tool 42 provided in the outer space of the display tool 42.
3 and 3.

[0005]

The present invention operates as follows, for example, as shown in FIG. In the illustrated valve closed state, the opening / closing moving member M is driven downward, the closing member 12 is in close contact with the valve seat 11, and the detector 41 is moved downward. As a result, the movement amount of the detector 41 is transmitted by the transmission means 43 (see FIG.
Is transmitted to the display tool 42 via the
Indicates the "closed" state. When the closing member 12 in the closed state is opened, the moving member M is driven upward. Then, the closing member 12 can be separated from the valve seat 11, and the detector 41 is raised by the upper end surface of the moving member M (here, the upper end surface of the boss 26). Then, the movement amount of the detector 41 is transmitted to the display tool 42 via the transmission means 43, and the display tool 42 displays the "open" state.

[0006]

The present invention has the following effects because it is configured and operates as described above. Since the opening / closing moving member of the actuator is connected to the closing member in series and the movement amount of the moving member is displayed, the opening / closing state of the closing member can be displayed more directly and reliably. Moreover,
Since the open / closed state of the closing member can be confirmed by visually recognizing the display device arranged in the outer space of the housing, it is clear and easy.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a vertical sectional view of a valve having an open / close display function. FIG. 2 is a schematic view of an indicator attached to the valve. FIG. 3 is an enlarged view of the portion indicated by arrow III in FIG. 1 described above.

A valve V, which is a container valve, comprises a valve body 1 and a fluid pressure type actuator 2, and the valve body 1
The leg screw 4 of the valve box 3 is attached to a gas cylinder (not shown). The gas inlet 5 formed on the bottom surface of the leg screw 4 and the gas outlet 7 formed on the left end surface of the outlet nozzle 6 are connected by a gas take-out passage 8. A valve chamber 10 and a valve seat 11 are formed in the middle of the gas outlet passage 8, and a central portion of a metal diaphragm (closing member) 12 mounted in the valve chamber 10 is in a direction substantially perpendicular to the valve seat 11. It is opened and closed. The peripheral portion of the diaphragm 12 has a lid bolt 13
Is propelled to the valve box 3 via the pressing cylinder 14 in a hermetically sealed manner. The inlet-side flow path 8 of the gas extraction path 8 is
The safety valve outlet 16 is branched from a.

The actuator 2 opens and closes the metal diaphragm 12 and is of a booster type. That is, the first piston 21 and the second piston 21 are provided in the housing 20 screwed to the upper portion of the valve box 3.
The piston 22 and the third piston 23 are vertically inserted. The second piston 22 is formed integrally with the third piston 23 and has a smaller diameter than the third piston 23. Above three pistons 21 ・ 2
The fluid pressure piston means F is constituted by 2.23.
In the valve closed state of FIG. 1, the urging force of the valve closing spring 25 composed of a plurality of disc springs passes through the first piston 21 and the piston rod 27 projecting downward from the first piston 21 of the same, and the intermediate force. The transmission 28 is pressed downward, and the intermediate transmission 28 brings the diaphragm 12 into close contact with the valve seat 11. That is, the moving member M for opening and closing the diaphragm 12 is configured by the above-described first piston 21, the piston rod 27, and the intermediate transmission tool 28. In addition,
The valve closing spring 25 is held by a boss 26 projecting upward from the first piston 21, and the boss 26 also constitutes a part of the opening / closing moving member M.

When the diaphragm 12 is separated from the valve seat 11, compressed air is supplied to the pneumatic working chamber 31 from the pneumatic port 30 provided in the lower portion of the housing 20 (here, the pressure is about 5 kgf / cm ² ). ). As a result, the large diameter third piston 23 is raised by the compressed air in the pneumatic working chamber 31, and at the same time, the small diameter second piston 22 is also raised. Then, the pressure of the oil in the hydraulic working chamber 32 is increased (about 20 kgf / cm ^{2 in this case} ) according to the pressure receiving area ratio of the third piston 23 and the second piston 22, and the large oil pressure is The piston 21 is raised against the valve closing spring 25.

As a result, the boss 26 and the piston rod 27 are also raised, so that the metal diaphragm 1 is
2 by the action of both the self-restoring force of the diaphragm itself and the pressure acting from the inlet side flow passage 8a (or the action of either one of these two).
Push up 8. As a result, the high-pressure gas in the gas cylinder (not shown) can be supplied to the use point through the inlet-side flow passage 8a, the valve chamber 10, the outlet-side flow passage 8b, and the gas outlet 7 in order.

When stopping the gas extraction, the compressed air in the pneumatic working chamber 31 is discharged from the pneumatic port 30. Then, since the hydraulic pressure in the hydraulic working chamber 32 disappears, the urging force of the valve closing spring 25 lowers the first piston 21, the second piston 22, and the third piston 23, and the spring 25 is attached. The force closes the diaphragm 12 via the piston rod 27 and the intermediate transmission 28. The third piston 23 is always urged upward by a plurality of weak springs 34 (only one is shown here) provided in the circumferential direction, but these springs 34 may be omitted. is there.

A screw hole 36 is formed in the center of the end wall 20a of the housing 20, and the push bolt 3 is inserted into the screw hole 36.
7 is screwed so that it can move back and forth. Then, during transportation or storage of the gas cylinder, the diaphragm 12 is held in the valve closed state by forcibly pressing the boss 26 in the valve closing direction by the push bolt 37. As shown in FIG. 3, the boss 26 has a screw hole 38 for manual valve opening.
Are formed. That is, when the diaphragm 12 is manually opened, the push bolt 37 is loosened upward and the pull-up bolt (not shown) is inserted into the screw hole 38.
Is screwed in and the boss 26 is moved upward against the valve closing spring 25 by the screw thrust of the lifting bolt.

Further, an indicator A for displaying the open / closed state of the diaphragm 12 is attached to the actuator 2. The indicator A is mainly composed of a dial gauge as shown in the schematic view of FIG. The dial gauge type display A includes a casing 40 and a rod 45 supported by the casing 40 so as to be vertically movable.
A detector 41 provided at a lower portion of the rod 45 so as to detect a vertical movement amount of the boss 26, a rotation pointer (display tool) 42 supported by the casing 40, and the detector 41. The vertical movement of the
Gear transmission mechanism (transmission means) 43 for enlarging conversion to a rotation angle of 2
And

The gear transmission mechanism 43 includes a rack 46 formed in an upper portion of the rod 45, and a gear train G from a pinion 47 engaged with the rack 46 to a pointer gear 48.
And is constituted by. In addition, the casing 40
The characters "open" and "closed" are written on the display surface 49 of. The rod 45 is always urged downward by a weak return spring (not shown).

The indicator A is the actuator 2
It is detachably attached to the housing 20. That is,
The push bolt 37 has a through hole 51 facing the upper end surface of the boss 26. Further, a mounting block 54 is externally fitted to the sleeve 53 of the casing 40 of the indicator A, and the block 54 is fixed to the sleeve 53 by a set screw 55.

When taking out the gas from the gas cylinder,
As shown in the closed state of FIG. 1 (or FIG. 3), the push bolt 37
Is mounted on the upper end portion (support portion S) of the end wall 20a of the housing 20 in a state in which the above-mentioned forced valve closed state is released by screwing the mounting block 54 from above. Then, the detector 41 of the display A is fitted into the through hole 51 and abuts on the upper end surface of the boss 26. In this abutting state, the rotation pointer 42 displays a "closed" state. Display A is
The weight of the block 54 and the weight of the block 54 maintain the posture shown.

When the valve body 1 is switched from the valve closed state to the valve opened state by the actuator 2, the boss 2
Since 6 moves upward and the detector 41 also linearly moves upward, the rotary pointer 42 is rotated approximately half way through the gear transmission mechanism 43 (see FIG. 2), and the rotary pointer 42 is "open". Display status.

While the gas cylinder is being stored or transported, the mounting block 54 and the indicator A are lifted upward and removed from the housing 20. This prevents the indicator A from being damaged by rough handling during storage or transportation of the gas cylinder. Moreover,
By removing the indicator A from the valve V, the valve V can be covered with the existing protective cap, so that a new protective cap is not required.

Further, since the indicator A can be held in the upright posture only by inserting the detector 41 into the through hole 51 of the push bolt 37 from above, it does not take much time to attach and detach the indicator A to and from the actuator 2. Moreover, since the push bolt 37 is used to hold the posture of the display A, it is not necessary to add a dedicated member for holding the posture, and the configuration is simple.

4 and 5 show a second embodiment and a third embodiment, respectively, corresponding to FIG. 3 described above. In these embodiments, members having the same configurations as those of the above-described first embodiment will be described with the same reference numerals in principle.

(Second Embodiment) In the second embodiment of FIG.
A cup-shaped leaf spring 61 is fitted in the bottom hole 60 of the mounting block 54. By externally fitting the spring-loaded block 54 to the push bolt 37 from above,
The leaf spring 61 causes the block 54 to move the push bolt 3
7 is held. Therefore, even when the gas cylinder and the valve are in an oblique posture or a horizontal posture, the actuator 2
It is possible to attach the display A to the housing 20 of FIG.

(Third Embodiment) In the third embodiment shown in FIG. 5, a C-shaped ring 63 in a plan view is fitted in the bottom hole 60 of the mounting block 54. Push bolt 3
7, the block 54 with a ring is externally fitted from the upper side, and then the ring 63 is set by a set bolt 64.
The block 54 is held by the push bolt 37 by pressing the block in the inner diameter direction. Therefore, even when the gas cylinder and the valve are in an oblique posture or a horizontal posture, the display A can be attached to the housing 20 of the actuator 2.

The first to third embodiments described above can be modified as follows. The closure member 12 is
Any member that can be opened and closed in a direction substantially vertical to the valve seat 11 may be used, and a poppet type member may be used instead of the diaphragm type member. The opening / closing moving member M is
The constituent elements may be divided. The actuator 2 may be a pneumatic type or a hydraulic type instead of a booster type, and further, an electromagnetic type or an electric type may be used.

The valve V may be a spring valve opening type instead of the spring valve closing type, and may be an actuator that performs both opening and closing operations.
The pointer of the display A may be linearly moved instead of being rotatable. Furthermore, the above display A
Can also be composed of a detector made up of a position sensor, a display made up of a light emitting diode or the like, and a transmission means made up of electronic control means.

The indicator A may be attached to the housing 20 of the actuator 2 by screw fitting, a snap ring, a U band or the like, or may be fixed to the housing 20 at all times. The valve V of the present invention may be a pipe valve attached in the middle of the pipe, instead of the container valve attached to the gas cylinder.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a valve with an open / close display function according to a first embodiment of the present invention.

FIG. 2 is a schematic view of an indicator attached to the valve.

3 is an enlarged view of a portion indicated by an arrow III in FIG. 1 described above.

FIG. 4 shows a second embodiment of the present invention and is a diagram corresponding to FIG. 3 described above.

FIG. 5 shows a third embodiment of the present invention and is a view corresponding to FIG. 3 above.

[Explanation of reference numerals] 2 ... Actuator, 3 ... Valve box, 11 ... Valve seat, 12 ... Closure member (diaphragm), 20 ... Actuator 2 housing, 20a ... End wall, 25 ... Valve closing spring, 37 ... Push bolt , 41 ... Detector, 42 ... Display tool (rotating pointer) 43 ... Transmission means (gear transmission mechanism), 51 ... Through hole, A ... Indicator, F
... fluid pressure piston means, M ... moving member, S ... supporting portion.

Claims (6)

[Claims] 1. A closing member (12) is provided in a valve box (3) so as to be able to open and close in a substantially vertical direction with respect to a valve seat (11), and the closing member (12) opens and closes an actuator (2). Moving member
Indicator (A) for connecting (M) in series and displaying the open / closed state of the above-mentioned closing member (12)
Is configured to be supported by the housing (20) of the actuator (2), and the indicator (A) includes a detector (41) for detecting the amount of linear movement of the moving member (M), and Housing (20)
The display tool (42) provided in the outer space of the
Transmission means for transmitting the detected amount of 1) to the above-mentioned display tool (42)
(43) A valve with an open / close display function, characterized in that 2. The valve with an opening / closing display function according to claim 1, wherein the actuator (2) urges the moving member (M) in a valve closing direction, and a valve closing spring (25) for the valve closing spring (25). A valve with an opening / closing display function, comprising: a fluid pressure piston means (F) for pressing the moving member (M) in the valve opening direction against the biasing force of the spring (25). 3. A valve with an opening / closing display function according to claim 1 or 2, wherein the indicator of the indicator (A) is constituted by a rotary pointer (42), and the transmission means (43).
The moving amount of the detector (41) by the rotation pointer (4
A valve with an opening / closing display function, which is configured by a mechanism for enlarging and converting to the rotation angle of 2). 4. The valve with an opening / closing display function according to claim 1, wherein an end wall (2) of the housing (20) of the actuator (2).
0a) is provided with a supporting part (S) for supporting the display (A) and a through hole (51) facing the moving member (M), and the supporting part (S) is provided with the above-mentioned indicator (S). With A) attached, the detector 41 is inserted into the through hole 51 and comes into contact with the moving member M, and the moving amount of the moving member M in the linear direction is increased. A valve with an open / close display function, characterized in that the valve can be displayed on the display tool (A) via the transmission means (43). 5. The valve with an opening / closing display function according to claim 4, wherein a push bolt (37) forcibly pressing the moving member (M) in a valve closing direction is attached to an end wall of the housing (20). (20a) is screwed so that it can move back and forth, and the push bolt (37) has the above-mentioned through hole.
A valve with an opening / closing display function, characterized in that (51) is formed. 6. The valve with an opening / closing display function according to claim 4, wherein the indicator (A) is detachably attached to the supporting portion (S). Valve with display function.