JPH08178122A - Opening and closing valve - Google Patents

Abstract

PURPOSE: To provide an opening and closing valve capable of carrying out easy and sure determination of an opened or a closed state by means of visualizing. CONSTITUTION: An opening and closing valve is provided with a fixed ring 4 fixed to a valve main body 1 and a movable ring 7 coaxially disposed in the outer peripheral side of this fixed ring 4 and connected to a handle 3 and a close display 5 is provided on the outer peripheral surface of the fixed ring 4. Thus, the movable ring 7 is moved in an axial direction following an opening or a closing operation by the handle 3 and in an opened position, the open display 5 of the fixed ring 5 is exposed to be visualized while in a closed position, the open display 5 is covered by the movable ring 7 preventing visualizing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve installed in a pipeline for high-pressure gas or the like, and more particularly to an open / close display structure thereof.

[0002]

2. Description of the Related Art In a facility such as a chemical plant that handles a large amount of high-pressure gas, a large number of gas pipes are laid between the respective devices. And production,
For various purposes such as maintenance and safety management, a large number of on-off valves are installed in these pipelines for controlling the connection of the pipelines. Some of these on-off valves are of a type that is mechanically operated by a so-called servo mechanism based on a command from an automatic control system, but there are many types of valves that are opened and closed manually by an operator. . In this case, it is necessary to confirm the open / closed state of the on-off valve from a position separated by a certain distance as a premise of the operation. However, the conventional on-off valve has the following problems.

That is, there are various types of on-off valves such as a ball valve and an angle valve, but the valve body having a valve seat inside and the valve seat can be opened and closed with rotation. It is common in that it consists of a simple spindle and a handle connected to this spindle. Therefore, the only way to determine the open / closed state of the on-off valve from the outside is to make a determination based on the difference in the height position of the handle that is visually observed, but this method is often difficult to make a reliable determination. It is necessary to approach the mounting position of the on-off valve each time, which is complicated and may adversely affect work efficiency.

As a remedy for this, there is also a method of providing a label indicating "open" and "closed", and hanging up or closing one of the tags at the handle or in the vicinity of the label each time it is opened or closed. As expected, the work becomes complicated and there are also display errors, so it cannot be a sufficient countermeasure. Further, there are some relatively large open / close valves and the like which are combined with an open / close display device, but they are generally expensive and cannot be attached to a small open / close valve.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an on-off valve which has a simple and inexpensive structure and can easily and surely determine the open / closed state by visual observation. . Further, it is another object of the present invention to provide an opening / closing valve capable of reliably displaying opening / closing even when the advance / retreat dimension of the spindle accompanying opening / closing is small.

[0006]

The on-off valve according to claim 1 of the present invention is a substantially cylindrical fixing ring fixed to the valve body coaxially with the spindle, and a substantially cylindrical fixing ring. A movable ring that is coaxially disposed on the outer peripheral side or the inner peripheral side with a predetermined gap and is connected to the handle and moves back and forth in the axial direction as the handle rotates is provided. The open or closed indication is given to the outer peripheral surface of the ring disposed on the outer peripheral surface of the ring, and the ring disposed on the outer peripheral side opens or closes the open or closed display with the opening or closing of the on-off valve. The open / close valve is opened / closed. In this case, rather than judging the open / closed state from quantitative observation of the handle's position dimension, whether the open / closed display on the inner ring is opened, that is, the state viewed from the outside It is a qualitative ON / OFF judgment, that is, whether the opening / closing display is closed, that is, it is hidden by the outer ring and cannot be seen from the outside. You can do it.

The open / close valve according to the second aspect of the invention has the fixed ring on the inner peripheral side and the movable ring on the outer peripheral side.
As a result, the circumferential position of the open / close display is fixed,
The visual identification becomes easier.

The on-off valve according to claim 3 is a cylindrical ring having a predetermined length in the axial direction, which is fixed to the valve body coaxially with the spindle and fixed to the valve body, and has a threaded portion formed on the inner peripheral surface. A hidden ring disposed on the outer peripheral side of the fixed ring with a predetermined gap so as to cover the fixed ring from the outside while leaving a portion having a predetermined length in the axial direction end portion thereof, and between the hidden ring and the handle. A rotation connecting portion that intervenes in the rotating ring and rotates the hidden ring as the handle rotates while controlling the axial position of the hidden ring, and a cylindrical threaded portion formed on the outer peripheral surface of the hidden ring is screwed into the threaded portion of the hidden ring. As described above, the movable ring is provided in the radial gap between the fixed ring and the hidden ring so that the rotational movement thereof is restricted, and either the open display or the closed display is provided on the shaft of the fixed ring. Direction end On the peripheral surface, either the open display or the closed display is applied to the outer peripheral surface of the axial end portion of the movable ring, respectively, and when the open / close valve is opened / closed by the handle, the inner surface of the hidden ring is retracted. The movable ring is located between a position where the display provided on the fixed ring is exposed and a position where a part of the display is projected from the hidden ring to cover the axial end portion of the fixed ring and where the display provided on the movable ring is exposed. The opening / closing of the on-off valve is displayed by moving the valve in the axial direction. in this case,
Since a hidden ring is provided in addition to the fixed ring and the movable ring, the open and closed indications are made at both the open and closed positions of the on-off valve, so that the visual confirmation of the open / closed state can be performed more reliably and easily. .

Further, in the on-off valve according to the fourth aspect, the pitch of the screw portions formed on the hidden ring and the movable ring is made larger than the screw pitch of the spindle.
The forward / backward dimension of the movable ring is enlarged as compared with the axial forward / backward dimension of the spindle due to the opening / closing operation, and as a result, the display area for opening / closing is increased and the visual observation is correspondingly facilitated.

[0010]

【Example】

Example 1. 1 is a partial cross-sectional perspective view showing the whole opening / closing display mechanism of an opening / closing valve according to Embodiment 1 of the present invention, and FIG.
It is a perspective view which shows independently the component of the opening / closing display mechanism shown by. In the figure, 1 is a valve body having a valve seat for opening and closing inside, and in FIG. 1, only a part of the upper end thereof is shown. Reference numeral 2 is a spindle that is pulled out from the upper end of the valve body 1 and that opens and closes the valve seat according to rotation. Reference numeral 3 is a handle that is connected to the spindle 2.

Reference numeral 4 denotes a cylindrical fixing ring which is coaxially attached to the spindle 2 and is fixedly attached to the valve body 1. As shown in FIG. An open display 5 consisting of the letters is given. In addition, 6 is a screw hole for attaching the fixing ring 4 to the valve main body 1, and three holes are provided at equal intervals in the circumferential direction. Reference numeral 7 denotes a movable ring which is coaxially arranged on the outer peripheral side of the fixed ring 4 with a predetermined gap therebetween, and, as shown in FIG. 2 (1), has a support portion 7a integrally formed at the upper end thereof. It is attached and fixed to the spindle 2 and rotates together with the spindle 2.

Next, the opening / closing display operation will be described with reference to FIG. In FIG. 1A, the entire fixed ring 4 is covered and hidden by the movable ring 7 on the outer peripheral side in a state where the on-off valve is in the closed position. Therefore, only the movable ring 7 can be seen from the outside, and the open display 5 provided on the outer peripheral surface of the fixed ring 4 cannot be seen at all.

FIG. 3B shows a state in which the on-off valve is in the open position,
That is, the handle 3 is rotated from the state shown in FIG. 1 and the spindle 2 is pulled out most. Along with this rotation operation, the movable ring 7 moves upward together with the spindle 2, the fixed ring 4 on the inner peripheral side thereof appears, and the open display 5 provided on the outer peripheral surface of the movable ring 7 becomes visible from the outside.

Therefore, if it is promised that the closed position is the state where the open display 5 is not visible, the open / closed state of the open / close valve can be easily and surely confirmed by visual inspection. That is, since the open / closed state is determined based on the presence or absence of the open display 5, the determination can be made easier and more reliable than the conventional determination based on the difference in the relative positions of the handle 3 and the spindle 2.

Further, in the first embodiment, the open / close display mechanism can be realized only by attaching the fixed ring 4 and the movable ring 7 having an extremely simple and inexpensive structure to the valve body 1 and the spindle 2 with screws.

In FIGS. 2 and 3, the character "open" is displayed as the open display 5. However, for example, the entire outer peripheral surface of the fixing ring 4 may be colored red to form the open display 5, Further, the character display of "open" and the display in the color may be used together. Further, in FIGS. 2 and 3, the movable ring 7 and the fixed ring 4 are axially overlapped with each other in the closed state of the on-off valve, and the open indication 5 on the fixed ring 4 is hidden by the movable ring 7. The rings 7 and 4 may be overlapped with each other in the open state of the on-off valve. However, in this case, a closed display is given on the fixed ring 4, and if the display is not visible, it is determined to be open, and if the closed display is visible, it is determined to be closed.

Further, although the fixed ring 4 is arranged on the inner peripheral side and the movable ring 7 is arranged on the outer peripheral side in the above embodiment, the inner and outer rings may be arranged in reverse.

Example 2. FIG. 4 is a sectional view showing the whole opening / closing display mechanism of an opening / closing valve according to Embodiment 2 of the present invention, FIGS.
[Fig. 5] is a view independently showing components of the open / close display mechanism shown in Fig. 4. In FIG. 4, reference numerals 1, 2, and 3 are a valve body, a spindle, and a handle, respectively. Reference numeral 8 is a cylindrical fixing ring coaxially attached to the spindle 2 and fixed to the valve body 1, the details of which will be described with reference to FIG. 5 (1) is a plan view thereof, FIG. 5 (2) is a side sectional view thereof, and FIG. 5 (3) is a sectional view taken along line AA of FIG. 5 (2).

As shown in FIG. 5, a horizontal receiving portion 8a is integrally formed at the upper end of the fixing ring 8 for receiving a hidden ring, which will be described later, and the upper surface of the receiving portion 8a has an upper surface.
A ridge portion 8 for smoothly rotating and sliding the hidden ring
b is formed. In addition, engaging projections 8c for restricting rotation of the movable ring, which will be described later, are integrally formed at two diagonal positions on the outer circumference of the fixed ring 8.

Then, as shown in FIG. 5B, a closed display 9 consisting of the letters "closed" is provided on the outer peripheral surface below the fixing ring 8. The fixing ring 8 is also structured to be fixed to the valve body 1 with screws like the fixing ring 4 in the first embodiment, but screw holes and the like are not shown.

Returning to FIG. 4, reference numeral 10 denotes a cylindrical movable ring which is coaxially arranged on the outer peripheral side of the fixed ring 8 with a predetermined gap therebetween, as shown in the plan view of FIG. 6 (1). The engaging projections 8 of the fixing ring 8 are provided at two diagonal positions on the inner circumference.
An engagement recess 10a with which c is engaged is formed. Also,
As shown in the side sectional view of FIG. 6B, the movable ring 10
A male screw portion 10b that is screwed into a female screw portion of a hidden ring, which will be described later, is integrally formed on the outer peripheral surface above.

As shown in FIG. 6 (2), an open display 11 composed of the letters "open" is provided on the outer peripheral surface below the movable ring 10.

Returning to FIG. 4, reference numeral 12 is a cylindrical hidden ring coaxially arranged on the outer peripheral side of the movable ring 10, the details of which will be described with reference to FIG. 7 (1) is a plan view thereof, and FIG. 7 (2) is a side sectional view thereof. As shown in (2) of FIG.
On the inner peripheral surface of the hidden ring 12, a female screw portion 12a with which the above-mentioned male screw portion 10b of the movable ring 10 is screwed is integrally formed. Further, at the upper end of the hidden ring 12, a receiving portion 12c provided with an engaging side plate portion 12b for engaging with a rotation connecting portion described later is integrally formed.

Returning to FIG. 4, the rotary connecting portion 13 is not shown in the figure, but is formed by processing a plate material having a predetermined width into a U shape, and the base portion thereof is the handle 3 (spindle 2). 7 (1) while engaging both ends with
As shown in the section by the one-dot chain line, the hidden ring 12 is attached so as to be screwed between each pair of engaging side plate portions 12b.

Next, the open / close display operation will be described mainly with reference to FIGS. First, FIG. 4 shows the appearance when the on-off valve is in the closed state, and FIG. 8 (1) also shows the appearance visually observed in this state. That is, the movable ring 10 is at the uppermost position, and all of it is immersed in the hidden ring 12. As a result, the closed display 9 provided on the outer peripheral surface of the fixing ring 8 is exposed and visually recognized from the outside. Of course, since the open display 11 provided on the outer peripheral surface of the movable ring 10 is covered with the hidden ring 12, it is not visually recognized.

Next, when the handle 3 is rotated to open the on-off valve, the rotating operation of the handle 3 causes the rotation connecting portion 13 and the engaging side plate portion 12b engaging with the rotation connecting portion 13 to rotate. It is transmitted to the hidden ring 12 via the hidden ring 12, and the hidden ring 12 rotates as the handle 3 rotates. In this case, since the receiving portion 12c of the hidden ring 12 is placed on the protruding portion 8b formed on the receiving portion 8a of the fixed ring 8, the hidden ring 12 is rotated smoothly and the handle is rotated by the rotation. Although 3 itself moves in the axial direction, the hidden ring 12 is restricted in its axial position and performs only rotational movement.

The hidden ring 12 and the movable ring 10 are connected to each other via a screwing mechanism of the female screw portion 12a and the male screw portion 10b of the both, and the movable ring 10 has its engaging recess 1
Since the engaging protrusion 8c of the fixed ring 8 is engaged with 0a, the rotational movement thereof is restricted. Therefore, when the hidden ring 12 rotates along with the rotation operation of the handle 3, the movable ring 10 descends following the rotation.

In FIG. 8 (2), when the rotating operation of the handle 3 advances to the open position of the on-off valve, the male screw portion 10b of the movable ring 10 reaches the lower end position of the female screw portion 12a of the hidden ring 12. Shows the visual appearance. In this state,
As can be seen from the figure, most of the movable ring 10 projects below the hidden ring 12 and the open display 11 provided on the outer peripheral surface of the hidden ring 12 is exposed and visible from the outside. Since the reference numeral 10 hides the fixing ring 8 on the inner peripheral side of the fixing ring 8, a closed indication 9 is formed on the outer peripheral surface of the fixing ring 8.
Is not visible.

As described above, in the open / close valve according to the second embodiment, the open display 11 appears at the open position of the open / close valve, and the closed display 9 appears at the closed position, that is, the state at both open / close positions. Since it is displayed, the open / closed state can be visually discriminated more easily and surely than in the first embodiment.

The characteristic of the second embodiment is that the movable ring 10 is moved by the screw portions 10b and 12a connecting the hidden ring 12 to each other. That is,
The axial movement dimension of the movable ring 10 associated with the rotating operation of the handle 3 is independent of the screw pitch of the spindle 2.
It is determined by the pitch of the separately provided screw portions 10b and 12a. Accordingly, for example, when the screw pitch of the spindle 2 is small and the number of rotations between the open / close positions is small, in such a case, it is extremely difficult to determine the open / closed state from the moving dimension of the handle 3. 10
By setting the pitches of b and 12a to appropriate values, it is possible to realize an open / close display mechanism that is easy to perform visual judgment and reliable, as described above.

In the second embodiment, the characters "open" and "closed" are displayed as the open / close display, but other display contents such as color may be displayed. In addition, in the second embodiment, the fixed ring 8 is provided with the closed indication 9 and the movable ring 10 is provided with the open indication 11, but the inclination of the screws of the screw portions 10b and 12a is reversed, and the fixed ring 8 is given the open indication. The ring 10 may be closed.

[0032]

As described above, in the on-off valve according to the first aspect of the present invention, since the predetermined fixed ring and the movable ring are provided, the structure is simple, and moreover, there is no choice but to judge from the position dimension of the handle. The open / closed state can be easily and surely visually determined as compared with the conventional case where there is no conventional method.

Further, in the on-off valve according to claim 2,
Further, since the fixed ring is arranged on the inner peripheral side and the movable ring is arranged on the outer peripheral side, the circumferential position of the open / close display is fixed, and the visual discrimination becomes easier.

Further, in the on-off valve according to claim 3,
Since the predetermined fixed ring, the movable ring, the hidden ring, and the rotary connecting portion are provided, the open / close display is displayed at each of the open position and the closed position, so that the open / closed state can be visually confirmed more reliably and easily.

Further, in the on-off valve according to claim 4,
Since the pitch of the threaded portions of the hidden ring and the movable ring is made larger than the screw pitch of the spindle, the advancing / retreating dimension of the movable ring due to the opening / closing operation is enlarged, and the visual confirmation becomes easier and more reliable.

[Brief description of drawings]

FIG. 1 is a partial sectional perspective view showing an entire opening / closing display mechanism for an opening / closing valve according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing components of the open / close display mechanism shown in FIG. 1 alone.

FIG. 3 is a diagram for explaining an open / close display operation of the open / close valve of FIG. 1.

FIG. 4 is a sectional view showing an entire opening / closing display mechanism of an opening / closing valve according to a second embodiment of the present invention.

FIG. 5 is a view showing the fixing ring 8 of FIG. 4 alone.

FIG. 6 is a view showing the movable ring 10 of FIG. 4 alone.

FIG. 7 is a view showing the hidden ring 12 of FIG. 4 alone.

FIG. 8 is a diagram for explaining an open / close display operation of the open / close valve of FIG.

[Explanation of symbols]

1 valve body, 2 spindles, 3 handles, 4, 8
Fixed ring, 5,11 open display, 7,10 movable ring, 9 closed display, 12 hidden ring, 13 rotary connection.

Claims (4)

[Claims] 1. An on-off valve comprising a valve body, a spindle for opening and closing a valve seat inside the valve body from outside of the valve body as the valve body rotates, and a handle connected to the spindle for rotating the spindle. A fixing ring coaxially attached to the spindle and fixed to the valve body, and a substantially cylindrical shape which is coaxially arranged on the outer peripheral side or the inner peripheral side of the fixed ring with a predetermined gap and is connected to the handle. A movable ring that advances and retreats in the axial direction as the handle rotates is provided, and an open or closed display is given to the outer peripheral surface of the ring that is arranged on the inner peripheral side of either the fixed or movable ring, and the outer peripheral surface The arranged ring opens or closes the open / closed valve by opening or closing the open / closed display as the open / closed valve opens / closes. Closed. 2. The on-off valve according to claim 1, wherein the fixed ring is arranged on the inner peripheral side and the movable ring is arranged on the outer peripheral side. 3. An on-off valve including a valve body, a spindle for opening and closing a valve seat inside the valve body from outside of the valve body with rotation, and a handle connected to the spindle for rotating the spindle. Cylindrical fixing ring fixed to the valve body coaxially with the spindle and fixed to the valve body, and cylindrical fixing ring having a threaded portion formed on the inner peripheral surface of the fixing ring, leaving an axial end portion of a predetermined length. And a hidden ring disposed on the outer peripheral side of the fixed ring with a predetermined gap so as to cover it from the outside, and the hidden ring is interposed between the hidden ring and the handle to regulate the axial position of the hidden ring. The fixing ring and the concealed ring so that the rotation connecting portion that rotates as the handle rotates and the threaded portion that is cylindrical and is formed on the outer peripheral surface thereof are screwed into the threaded portion of the concealed ring. And a movable ring arranged so that its rotational movement is restricted in a radial gap between the fixed ring and the fixed ring on the outer circumferential surface of the axial end portion. Either the indication or the closure indication is applied to the outer peripheral surface of the axial end portion of the movable ring, respectively, and is applied to the fixed ring by being retracted into the hidden ring in accordance with the opening / closing operation of the opening / closing valve by the handle. The movable ring is moved in the axial direction between a position where the display is exposed and a position where a part of the display protrudes from the hidden ring to cover the axial end of the fixed ring and where the display provided on the movable ring is exposed. The on-off valve is characterized in that the on-off valve is opened and closed accordingly. 4. The on-off valve according to claim 3, wherein the pitch of the threaded portions formed on the hidden ring and the movable ring is made larger than the threaded pitch of the spindle.