JP2967331B2 - Valve open / close indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing indicator for displaying the degree of opening of a valve, such as a fully opened or fully closed valve, for example, for checking a valve of a high pressure gas cylinder or a safety valve of a nuclear power plant. Used for test valves sometimes used.

[0002]

2. Description of the Related Art A safety valve such as a nuclear power plant is dangerous if it breaks down. Therefore, the safety valve is regularly inspected. At the time of this inspection, the test valve provided on the upstream side of the safety valve is fully closed to perform the inspection, and after the inspection is completed, the test valve is returned to the fully open state again.

[0003]

As described above, when checking the safety valve, the test valve is fully closed or fully opened.
Whether the test valve is fully closed or fully opened depends on the intuition of the valve operator. For this reason, it was sometimes erroneously recognized that the door was half-open but was fully opened or fully closed.

Further, since there is no indication of a valve opening outside the valve, such as "normally open" indicating a fully open state or "normally closed" indicating a fully closed state, the valve is closed. In some cases, the valve may be mistakenly opened and the valve may not be opened. This can cause the safety valve to fail and cause catastrophe.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to make it possible to easily and reliably check the opening and closing of a valve from the outside.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a valve opening / closing indicator removably mounted on a protruding portion of a valve stem, the amount of which varies according to the valve opening; A normally closed display means provided on one end side of the base, and a normally open display means provided on the other end side; the normally closed display means is provided with an amount of protrusion of the protruding portion of the valve stem when the valve is fully closed. And a loose fitting groove formed in the holding portion and into which the valve stem is inserted, and a display that is continuous with the holding portion and indicates full closure. A locking portion provided on the holding portion and engaging with at least one of the valve lid and the handle when the amount of protrusion and the width of the clip correspond to each other; Is a holding portion formed with a clamping width corresponding to the amount of protrusion of the protruding portion of the valve stem when the valve is fully opened. Provided in the holding portion, and a loosely fitting groove of the valve stem is inserted, continuous with the holding portion, and,
A display portion indicating full open, and a locking portion provided on the holding portion and engaging with at least one of the valve lid and the handle when the protrusion amount and the clamping width correspond. It is an object of the present invention to achieve the above object by a valve opening / closing indicator.

[0007]

When the handle is turned in a predetermined direction and the valve rod is slid in the valve closing direction, the amount of protrusion of the valve rod protrusion gradually decreases. At this time, when the handle is further turned in the same direction while loosely fitting the loose fitting groove of the valve opening / closing indicator indicating that the valve is normally closed to the valve stem, the amount of projection of the projecting portion becomes smaller than that of the holding portion. At the same time as the width is reached, the handle does not rotate and the sliding of the valve stem stops. At this time, the locking portion of the display device is locked to the valve cover, and both side surfaces of the holding portion are sandwiched between the valve cover and the handle.

When the handle is turned in the opposite direction to the above and the valve stem is slid in the valve opening direction, the amount of projection of the projecting portion of the valve stem gradually increases. At this time, the locking part is separated from the valve lid, and the display falls by its own weight.

When the handle is further turned in the same direction, the amount of protrusion of the protrusion corresponds to the width of the holding portion of the holding portion of the valve opening / closing indicator indicating that the handle is normally open. When the loose fitting groove of the holding portion is inserted into the projecting portion, the locking portion is locked by the engaging portion of the valve cover, and both side surfaces of the holding portion are sandwiched between the valve cover and the handle.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. A globe valve 2 is provided upstream of the safety valve 1. The globe valve 2 includes a valve seat 4 provided in a valve box 3, a valve element 5 seated on the valve seat 4, and a valve rod 7 connecting the valve element 5 and a handle 6. ing. The protruding amount of the protruding portion 7a of the valve stem protruding from the valve cover 10 changes in accordance with the degree of opening of the valve, and reaches a maximum value L3 when fully open and a minimum value L1 when fully closed. In addition, 11 denotes a flow direction of the fluid, 12 denotes a primary side flow path, and 13 denotes a secondary side flow path.

As shown in FIGS. 2 to 4, a normally closed valve opening / closing indicator 15 showing a fully closed state includes a holding portion 16 and a display portion 1.
7 is provided. The holding portion 16 is formed with a clamping width W1 corresponding to the amount of projection L1 of the protruding portion 7a of the valve stem when the valve is fully closed. For example, 5 mm
Is adopted.

The holding portion 16 has a U
A character-shaped loose fitting groove 18 is formed. This loose fitting groove 1
8 is formed to be larger than the diameter d of the valve rod 7.

The holding portion 16 has a concave locking portion 20 formed concentrically with the loose fitting groove 18 and provided along the periphery of the loose fitting groove 18. . The locking portion 20 is provided with a cylindrical engaging portion 10 provided at the tip of the valve lid 10.
It is formed so that it can be fitted into a.

The display section 17 includes the characters "normally closed". However, the present invention is not necessarily limited to this character. In other words, it is sufficient if the display indicates that the display is fully closed. It may be displayed as “closed” or “fully closed”.

Next, the normally open valve opening / closing indicator 25, which indicates a fully open state, includes a holding portion 26 and a display portion 27, as shown in FIGS. The holding portion 26 is formed with a pinch width W3 corresponding to the protrusion amount L3 of the protrusion 7a of the valve stem when the valve is fully opened. As the sandwich width W3, for example,
10 mm is adopted.

The holding portion 26 has a U
A letter-shaped loose fitting groove 28 is formed. This loose fitting groove 2
8 is formed to be larger than the diameter d of the valve rod 7.

The holding portion 26 has a concave locking portion 30 formed concentrically with the loose fitting groove 28 and provided along the periphery of the loose fitting groove 28. . The locking portion 30 is provided with a cylindrical engaging portion 10 provided at the tip of the valve lid 10.
It is formed so that it can be fitted into a.

The display section 17 has the character "normally open". However, the character is not necessarily limited to this character. In other words, it is sufficient if the display indicates that it is fully open. It may be displayed as "open" or "full open".

Next, the operation of this embodiment will be described. Before starting the inspection of the safety valve 1, as shown by the chain line in FIG.
The handle 6 of the ball valve 2 in the fully opened state is rotated in the direction of arrow A6, and the valve stem 7 is moved in the valve closing direction.

The loose fitting groove 18 of the valve opening / closing indicator 15 is inserted into the projecting portion 7a of the valve rod 7 while the engaging portion 20 and the engaging portion 10a face each other, and the handle 6 is further moved in the same direction. As shown by the solid line in FIG. 1, the valve body 5 is seated on the valve seat 4 to be fully closed, and the handle 6 does not rotate.

At this time, the projecting amount L1 of the projecting portion 7a of the valve stem becomes equivalent to the clamping width W1 of the holding portion 16 of the display device 15, and the holding portion 16 is moved by the valve cover 10 and the handle 6. The holding portion 20 is engaged with the engaging portion 10 a of the valve lid 10. Therefore, the indicator 15 is attached to the protruding portion 7a of the valve stem and does not drop.

The operator or the like confirms that the valve is in the fully closed state by looking at the display of "normally closed" on the display section 17 of the display device 15.

As described above, the holding portion 16 of the display 15
Can be mounted only when it corresponds to the protrusion amount L1 of the protruding portion 7a of the valve stem in the fully closed state. Therefore, when the valve is not completely closed, that is, as shown in FIG.
In this case, the display device 15 falls or tilts, and normal display cannot be performed.

When it is confirmed that the ball valve 2 is fully closed, that is, normally closed, the inspection of the safety valve 1 is started. When the inspection is completed, the operator rotates the handle 6 in the direction opposite to the arrow A6, and slides the valve rod 7 in the valve opening direction.

When the amount of protrusion of the protruding portion 7a of the valve stem 7 gradually increases, the locking portion 20 of the valve opening / closing indicator 15 and the valve cover 1
0 is disengaged from the engagement portion 10a, and the indicator 15 falls by its own weight.

When the handle 6 is further rotated in the same direction, the valve element 5 is separated from the valve seat 4 and fully opened, and the amount of projection L3 of the projecting portion 7a of the valve rod 7 is determined by the clamping width of the valve opening / closing indicator 25. It becomes equivalent to W3. In this state, the loose fitting groove 28 of the indicator 25 is fitted into the projecting portion 7a, and the locking portion 30 is engaged with the engaging portion 10a of the valve lid 10.

As described above, the holding portion 26 of the display 25
Can be mounted only when it corresponds to the protrusion amount L3 of the protruding portion 7a of the valve stem in the fully opened state, so that the valve is not completely opened, that is, as shown in FIG. In this case, the display 25 cannot be fitted into the protruding portion 7a.

A second embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the first embodiment is as follows. (1) In the first embodiment, the valve opening / closing indicator 15 indicating “normally closed” and the valve opening / closing indicator 20 indicating “normally open” are individually formed. A valve open / close indicator (means) 35 indicating "normally closed" is provided;
A valve indicator (means) 45 indicating "normally closed" is provided on the other end side 40b.

(2) In the first embodiment, only the engaging portion 20 that engages with the engaging portion 10a of the valve lid 10 is provided.
In this embodiment, in addition, an engaging portion 20 that engages with the engaging portion 6a of the handle 6 is formed, that is, the engaging portions 2 are provided on both side surfaces of the holding portion.
0 was formed. In this embodiment, “normally closed”
Is displayed on the front surface 40A side of the base 40, the "normally open" display is displayed on the back 40B side of the base 40, and the characters are arranged so that the characters are not turned upside down at the time of mounting. I have.

A third embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the second embodiment is as follows. (1) A bent portion 50 is formed in a portion that divides the entire length of the base 40 into two, and when the base 40 is bent from the bent portion 50 to the back 40B side and both end portions are overlapped, both holding portions 56A of the display device 55A.
Is equivalent to the amount of protrusion L1 of the protruding portion of the valve stem in the fully closed state, and when it is bent toward the front side of the table 40A and the both ends are overlapped, the holding portion 56B of the indicator 55B is closed. The clamping width W3 is configured to correspond to the projection amount L3 of the protruding portion of the valve stem in the fully opened state.

(2) When the characters “open” or “closed” on the display section 57 are arranged symmetrically with respect to the bent portion 50 of the base 40 and the base 40 is bent from the bent portion 50 , Surface 4
0A, the opening and closing of the valve can be confirmed from both sides of the back surface 40B.

(3) The pins 61A, 61B and the pin holes 62A, 62B are provided on the front and back surfaces 40A, 40B of the base 40, and when the base 40 is bent, the pins are pressed into the pin holes, and the superposed holding parts are separated. That they do not.

Reference numeral 60 denotes a clamping width W3 when the display device 65 is bent from the bent portion 50 and the holding portion 56B is overlapped.
The protrusions 63A and 63B indicate locking portions formed in a concave shape in order to correspond to the protrusion amount L3 of the valve stem in the fully opened state.

The embodiment of the present invention is not limited to the above. For example, the embodiment can be configured as follows. (1) Instead of locking the holding portion of the valve opening / closing indicator to the valve lid, it may be locked to the handle. or,
The locking means is not limited to this, for example,
A projection may be provided on the side surface of the holding portion of the valve opening / closing indicator, and the projection may be inserted into a support hole formed in the valve lid or the handle.

(2) Instead of providing a locking portion on the holding portion of the valve opening / closing indicator, the locking portion may be omitted and the valve opening / closing indicator may be directly held between the handle and the valve lid. At this time, it is preferable to press both sides of the holding portion of the display device so as to increase the frictional resistance.

[0036]

As described above, according to the present invention, since the holding width of the holding portion is set so as to correspond to the amount of protrusion of the valve stem corresponding to the valve opening, the indicator is attached to the protrusion. When mounted, the open / closed state of the valve and the valve open / close display on the display unit match. Therefore, when the width of the holding portion of the valve opening / closing indicator is made to correspond to the amount of projection of the projecting portion of the valve stem in the fully opened state, the valve is fully opened when the indicator is mounted on the projecting portion, A display indicating a fully closed state is made on the display unit.If the width of the pinch corresponds to the amount of protrusion of the protruding portion of the valve stem in the fully closed state, when the indicator is mounted on the protruding portion, The valve is in the fully closed state, and a display indicating the fully open state is displayed on the display unit. For this reason, the accurate open / closed state of the valve can be reliably confirmed from the outside, so that the problem as in the conventional example can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a partially sectional view showing a normally closed valve opening / closing indicator.

FIG. 3 is a side view showing a normally closed valve opening / closing indicator.

FIG. 4 is a partial cross-sectional view showing a use state of a normally closed valve opening / closing indicator.

FIG. 5 is a partial sectional view showing another state.

FIG. 6 is a partial cross-sectional view of a normally open valve opening / closing indicator.

FIG. 7 is a side view of a normally open valve opening / closing indicator.

FIG. 8 is a partial cross-sectional view showing a use state of a normally open valve opening / closing indicator.

FIG. 9 is a plan view showing a second embodiment of the present invention.

FIG. 10 is a partial sectional side view showing a second embodiment of the present invention.

FIG. 11 is a rear view showing a second embodiment of the present invention.

FIG. 12 is a partial cross-sectional view showing a use state.

FIG. 13 is a plan view showing a third embodiment of the present invention.

FIG. 14 is a side view showing a third embodiment of the present invention.

FIG. 15 is a rear view showing a third embodiment of the present invention.

FIG. 16 is a diagram illustrating a use state when the valve is closed.

FIG. 17 is a plan view of the valve opening / closing indicator when the valve is closed.

FIG. 18 is a diagram illustrating a use state when the valve is opened.

FIG. 19 is a plan view of the valve opening / closing indicator when the valve is opened.

[Explanation of symbols]

 Reference Signs List 6 Handle 7 Valve stem 7a Projecting portion 10 Valve lid 10a Engaging portion 15 Valve opening / closing indicator 16 Holding portion 17 Display portion 18 Free fitting groove 20 Locking portion 25 Valve opening / closing indicator 26 Holding portion 27 Display portion 28 Free fitting Groove 30 Locking part 40 Base 55A Valve open / close indicator 55B Valve open / close indicator 56A Holder 56B Holder 58 Valve open / close indicator

Claims (9)

(57) [Claims] 1. A valve opening / closing indicator that is removably mounted on a protruding portion of a valve rod whose protruding amount changes in accordance with a valve opening, and is sandwiched between a valve cover and a handle; A holding portion formed with a clamping width corresponding to the amount of protrusion of the valve stem corresponding to the degree; a loose fitting groove provided in the holding portion and into which the valve stem is inserted; A valve opening / closing indicator comprising: a display section for indicating a valve opening corresponding to the clamping width. 2. A valve opening / closing indicator removably mounted on a protruding portion of a valve stem, the amount of which changes in accordance with the valve opening; the valve opening / closing indicator corresponding to the valve opening. A holding portion formed in the holding width; a loose fitting groove formed in the holding portion and into which the valve stem is inserted; a valve continuous with the holding portion and corresponding to the holding width. A display portion for indicating an opening degree; and a locking portion provided on the holding portion and engaging with at least one of the valve lid and the handle when the protrusion amount and the clamping width correspond to each other. A valve opening / closing indicator. 3. The display device according to claim 1, wherein the holding portion is formed to have a width corresponding to the amount of protrusion of the protruding portion of the valve stem when the valve is fully closed, and the display portion indicates that the valve is normally closed. The valve opening / closing indicator according to claim 1 or 2. 4. The valve according to claim 1, wherein said holding portion is formed to have a width corresponding to an amount of protrusion of the protruding portion of the valve stem when the valve is fully opened, and the display portion indicates that the valve is normally open. Item 3. The valve opening / closing indicator according to Item 1 or 2. 5. A valve opening / closing indicator which is removably mounted on a protruding portion of a valve stem, the amount of which varies according to the valve opening, and is sandwiched between a valve lid and a handle of the valve stem.
The valve opening / closing indicator includes a normally-closed indicator provided at one end of the base and a normally-opened indicator provided at the other end of the base; A holding portion formed with a clamping width corresponding to the amount of protrusion of the projecting portion; a loose fitting groove formed in the holding portion and into which the valve stem is inserted; A normally closed display means, wherein the normally open display means is provided with a holding portion formed with a clamping width corresponding to the amount of protrusion of the valve stem protrusion when the valve is fully opened, and provided on the holding portion. A valve opening / closing indicator, comprising: a loose fitting groove into which the valve stem is inserted; and a display portion that is continuous with the holding portion and indicates full open. 6. A valve opening / closing indicator removably mounted on a protruding portion of a valve rod, the amount of which varies in accordance with the degree of valve opening; said valve opening / closing indicator being provided on one end side of a base. A normally-closed display means and a normally-open display means provided at the other end; the normally-closed display means is formed to have a clamping width corresponding to the amount of projection of the valve stem when the valve is fully closed. A holding portion, a loose fitting groove formed in the holding portion and into which the valve stem is inserted, a display portion that is continuous with the holding portion and indicates full closure, And a locking portion which engages at least one of the valve lid and the handle when the projection amount corresponds to the clamping width; the normally open indicating means is a valve stem when the valve is fully opened. A holding portion formed with a clamping width corresponding to the amount of protrusion of the projecting portion, and provided on the holding portion, and A loose fitting groove into which the valve stem is inserted, a display portion that is continuous with the holding portion and indicates full open, and is provided in the holding portion, and the protrusion amount corresponds to the clamping width. A valve opening / closing indicator comprising: a locking portion that engages at least one of a valve lid and a handle. 7. A valve opening / closing indicator removably mounted on a protruding portion of a valve stem, the amount of which changes in accordance with a valve opening, wherein said valve opening / closing indicator is provided at both ends of a surface of a base. Normally closed display means provided respectively, and normally open display means provided respectively at both ends of the back surface;
A holding portion formed such that the normally-closed display means is formed such that a sandwiching width when the base is bent to the rear surface side and both ends are overlapped corresponds to a projecting amount of a valve stem projecting portion when the valve is fully closed; A loose fitting groove formed in the holding portion, and into which the valve stem is inserted, and a display portion that is continuous with the holding portion and indicates full closure;
The normally open display means is formed such that the width of the pinch when the base is bent to the surface side and both ends are overlapped corresponds to the amount of projection of the valve stem when the valve is fully opened. Valve opening and closing, comprising: a loose fitting groove provided in the holding portion and into which the valve stem is inserted, and a display portion continuous to the holding portion and indicating full opening. Indicator. 8. A valve opening / closing indicator removably mounted on a projecting portion of a valve rod, the amount of which varies according to the valve opening; said valve opening / closing indicator is provided at both ends of the surface of the base. Normally closed display means provided respectively, and normally open display means provided respectively at both ends of the back surface;
A holding portion formed such that the normally-closed display means is formed such that a sandwiching width when the base is bent to the rear surface side and both ends are overlapped corresponds to a protrusion amount of a valve stem protrusion portion when the valve is fully closed; A loose fitting groove formed in the holding portion, and into which the valve stem is inserted, and a display portion that is continuous with the holding portion and indicates full closure;
A locking portion provided on the holding portion and engaging with at least one of the valve lid and the handle when the projection amount corresponds to the clamping width; A holding portion formed so that a sandwiching width when the base is folded to the surface side and both ends are overlapped corresponds to the amount of protrusion of the protruding portion of the valve stem when the valve is fully opened, and provided on the holding portion; A loose fitting groove into which the valve stem is inserted, a display portion that is continuous with the holding portion, and indicates full open, and is provided in the holding portion;
A valve opening / closing indicator comprising: a locking portion that engages with at least one of the valve lid and the handle when the amount of protrusion corresponds to the width of the clip. 9. The valve opening / closing indicator according to claim 2, wherein the locking portions are formed on both side surfaces of the holding portion.