JP2003120854A - Opening display structure for three-way valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening display structure for a three-way valve capable of intuitively recognizing a present switching condition. SOLUTION: In this three-way valve having three ports opened at predetermined angular intervals around a shaft center of a valve rod, and a rotating valve element rotated by the rotational driving of an input shaft 47 of an operating device 41 for opening and closing the ports, an opening display board 100 is fixed around the input shaft 47, three open port display marks 101, 102, 103 respectively corresponding to the ports are formed on the opening display board 100 at predetermined angular intervals, a shutter 104 rotated around the shaft center of the input shaft 47 in accompany with the rotation of a rotating valve element is movably mounted at an upper part of the opening display board 100 from a position for shielding the open port display mark 103 at one side to a position for shielding the open port display mark 102 at the other side during the rotation of the rotating valve element from one end side to the other end side in a rotating range. The opening condition is displayed by an opening display pattern represented by the combination of the open port display marks 101, 102, 103 which are out of the shutter 104 to be exposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way valve opening degree display structure, and an operator mistakenly recognizes the opening degree in a three-way valve such as a gas ball valve having a valve element that rotates around the axis of a valve rod. The present invention relates to a technology for preventing this.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS.
The three-way valve 10 includes a rotary valve body 12 inside a T-shaped valve box 11.
And a valve rod (not shown) for rotationally operating the rotary valve body 12 is connected at its upper end to an operating machine described later.

The valve box 11 has a first in-valve flow path 14A and second and third in-valve flow paths 14B and 14C which are opposed to each other in an axis orthogonal to the axis of the in-valve flow path 14A. , And the valve chamber 15 communicating with these three valve box internal flow passages 14A, 14B, 14C, and from the valve chamber 15 to the valve box internal flow passages 14B, 1
Valve box seats 16B and 16C are provided in the openings to 4C, respectively.
Is provided.

In the rotary valve body 12, the three openings 18A, 18B, 18C of the valve body flow passage 17 formed inside each have three valve passages 14A, 14B, 14 in the valve body 11, respectively.
Corresponding to C, the valve box side seats 16B, 16 are attached to the closing portion 18D.
A valve body sheet 19 that can slide on C is provided. The rotary valve body 12 is housed in the valve chamber 15 of the valve box 11 rotatably around a central axis located on the intersection of the axes of the three openings 18A, 18B, 18C, and in the range of 0 to 180 °. It can be rotated over.

In this three-way valve 10, the rotary valve body 12 is rotated in the range of 0 to 180 ° via the valve rod, and as shown in FIG. A first open state communicating with the second flow path 14B inside the valve box, and as shown in FIG. 7, the first flow path 14A inside the valve box, the second flow path inside the valve box 14B, and the third valve A second open state (full open state) communicating with the in-box flow passage 14C and a second open state communicating with the first in-box flow passage 14A and the third in-box flow passage 14C as shown in FIG. It is possible to sequentially switch to the 3-open state.

As an operating device, for example, as shown in FIG. 5, there is a multistage decelerating operating device. In this operating device 41, a cover 43 is fixedly attached to the upper end of a case 42 with bolts 44, and the cover 43 holds an input shaft 47 rotatably via a sleeve portion 46 of an opening degree indicator 45, and the cover 43 is fixed. The upper surface is provided with a scale plate 43a equally divided from the fully closed position to the fully opened position along the circumferential direction.

The case 42 has an upper case 48 and a lower case 49 fastened together by bolts 44, and an internal gear 50 is formed on the inner surface of the upper case 48. The first planetary gear 51 that meshes with the internal gear 50 meshes with the first sun gear 52 provided on the input shaft 47,
The input shaft carrier 53 that rotatably holds the lower end of the
The gear shaft 54 of the planetary gear 51 is rotatably held.

The second sun gear 55 provided on the input shaft carrier 53 meshes with the second planetary gear 56, the second planetary gear 56 meshes with the internal gear 50, and the gear shaft 57 of the second planetary gear 56 is at the bottom. An output shaft carrier 58 arranged inside the case 49 is rotatably held.

The lower case 49 holds a small diameter portion 59 of the output shaft carrier 58 rotatably at a bottom boss portion 60, and a large diameter portion 61 of the output shaft carrier 58 at a seat portion 62 formed at the upper end of the boss portion 60. Holds rotatably.

The opening carrier 63, which is rotatably fitted to the input shaft 47, rotatably holds the gear shaft 54 of the first planetary gear 51, and is intermediate to the opening sun gear 64 provided on the opening carrier 63. The large gear 65 meshes with the intermediate large gear 6
The intermediate small gear 66 that rotates integrally with the gear 5 meshes with the opening gear 67 provided in the sleeve portion 46 of the opening indicator 45, and covers the gear shafts 68 of the intermediate large gear 65 and the intermediate small gear 66.
Is rotatably held.

In the operating device having the above-described structure, the first planetary gear 51 meshing with the first sun gear 52 by the rotation of the input shaft 47 rotates about the axis of the gear shaft 54 and meshes with the internal gear 50 to mesh with the input shaft. It revolves around the axis of 54.

By the revolution of the first planetary gear 51, the input shaft carrier 53 rotates integrally with the gear shaft 54 around the axis of the input shaft 47, and the rotation of the input shaft carrier 53 meshes with the second sun gear 55. The second planetary gear 56 revolves around the axis of the input shaft 54 by meshing with the internal gear 50 while rotating around the axis of the gear shaft 57, and is output integrally with the gear shaft 57 by the revolution of the second planetary gear 56. The shaft carrier 58 rotates.

On the other hand, due to the revolution of the first planetary gear 51, the opening carrier 63 rotates integrally with the gear shaft 54 around the axis of the input shaft 47, and the opening sun gear 64.
The rotation of the intermediate large gear 65 and the intermediate small gear 66 rotates about the axis of the gear shaft 68, and the rotation of the intermediate small gear 66 rotates the opening indicator 45 integrally with the opening gear 67.
The opening indicator 45 rotates at the same rotation angle as the rotation angle of the output shaft carrier 58, and the pointer 45a indicates the same opening as the opening of the valve rod to the operator on the scale plate 43a.

[0014]

By the way, the three-way valve is installed at the branch portion of the pipe line and its open / closed state (pattern).
Since it has three open states, it is more likely that the operator will mistakenly recognize the current open / closed state as compared with the two-way valve. Also,
When visually recognizing the opening degree indicated by the pointer 45a on the scale plate 43a, it is necessary to memorize the relationship between the opening degree and each open / closed state in advance and derive the open / closed state corresponding to the current open degree by thinking. It will be a factor to misunderstand the state.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a three-way valve opening degree display structure capable of intuitively recognizing the current open / closed state.

[0016]

In order to solve the above-mentioned problems, a three-way valve opening degree display structure of the present invention according to claim 1 has three ports which are opened at predetermined angular intervals around the axial center of a valve rod. In a three-way valve that has a valve body that opens and closes a port and is rotated by rotational driving of an input shaft of an operating machine, an opening degree display plate is fixedly arranged around the input shaft, and the opening degree display plate corresponds to each port Three open-port display marks are provided at predetermined angular intervals, and a shutter that rotates around the axis of the input shaft with the rotation of the valve body is installed above the opening display plate from the one end side of the rotation range to the other. A combination of open port display marks that are exposed so that they can be moved from the position that shields the open port display mark on one side to the position that shields the open port display mark on the other side while rotating toward the end, and that is exposed when the shutter is released. Opening display pattern expressed by Thus it is for displaying the opening state.

With the above structure, the state where the valve body closes one of the ports corresponds to the state where the shutter shields the open port display mark corresponding to the port, and the valve body does not close any port. The state corresponds to the state where the shutter does not block any open port display mark.

For this reason, all the open port display marks are exposed out of the shutter, and the opening degree display pattern represented by the combination of the three open port display marks shows a fully open state in which all three ports are in communication. The open port display mark on one side is blocked by the shutter, the remaining two open port display marks are exposed, and the opening display pattern expressed by the combination of the open port display mark on the other side and the open port display mark in the center is The one side closed state where the side port and the center port communicate with each other is shown. The open port display mark on the other side is blocked by the shutter, the remaining two open port display marks are exposed, and the opening display pattern expressed by the combination of the open port display mark on the one side and the open port display mark on the center is The other side single-sided closed state in which the side port and the center port communicate with each other is shown.

Therefore, the open / closed state of the valve in the three-way valve is
It can be displayed by an opening degree display pattern formed by a combination of display marks exposed outside the shutter, and the operator can intuitively recognize the open / closed state of the valve by visually recognizing the opening degree display pattern.

In the opening degree indicating structure of the three-way valve according to the second aspect of the present invention, the opening degree indicating plate is made of a transparent resin material, and
A light-colored open-port display mark is displayed on the back surface of the opening display plate, and the shutter is darkly colored.

With the above-mentioned structure, the open port display mark can be prevented from being damaged or stained by being present on the back surface of the opening degree display plate, and the open port display mark is colored with a bright color to stand out against the dark shutter. By doing so, it is possible to make the open port display mark easy to visually recognize.

According to a third aspect of the present invention, there is provided a three-way valve opening degree display structure in which a protective cap is attached to the head of the operating device so as to cover the opening degree display plate and the shutter. With the above-described configuration, the opening indicator plate can be protected from dirt, muddy water, etc. by the protective cap, and the open port display mark can be maintained in a state that is always easily visible by removing the protective cap during operation.

According to a fourth aspect of the present invention, there is provided a three-way valve opening degree display structure in which an operating port is provided with a branch display mark together with an open port display mark corresponding to a central port located between ports on both sides. is there.

In the above-mentioned structure, when the three-way valve is buried in the ground, the burying direction of the three-way valve and the piping form connected to the three-way valve cannot be visually recognized. Therefore, it is difficult to determine which port each open port display mark of the operating device corresponds to. For example, if all three open port display marks are exposed outside the shutter, it is recognized that the center open port display mark sandwiched between the left and right open port display marks corresponds to the center port of the three-way valve. I can, but
If the open port indication mark on one side is covered by the shutter and the remaining two open port indication marks are exposed, it is not clear which of the open port indication marks corresponds to the center port. The opening state of the valve cannot be cut off immediately.

Therefore, by providing a branch display sign on the operating device corresponding to the center port of the three-way valve, the operator can easily recognize the embedding direction of the three-way valve by visually recognizing the branch display sign. At the same time, the current open state of the three-way valve can be immediately cut off by immediately recognizing the open port display mark corresponding to the central port.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, FIG.
The case of application to the three-way valve described in FIG. 8 will be described. Further, since the basic configuration of the operating device of the present invention is the same as that described above with reference to FIG. 5, members that perform the same operation are designated by the same reference numerals, and the description thereof will be omitted, and the main parts will be described.

1 to 4, an opening display plate 100 surrounding the input shaft 47 is fixedly arranged on the top surface of the cover 43, and the opening display plate 100 is made of a transparent resin material. On the opening display plate 100, the flow passages (ports) 14A and 1 in each valve box are provided.
3 open port indication marks 10 corresponding to 4B and 14C
1, 102 and 103 are provided at a predetermined angular interval (90 °). The open port display marks 101, 102, 103 are colored on the back surface of the opening display plate 100 with a bright color, for example, yellow paint.

A sleeve portion 4 is provided above the opening display plate 100.
The shutter 104 is fixed to No. 6, and the shutter 104 is provided in a direction corresponding to the closed portion 18D of the rotary valve body 12, and is colored with a dark color, for example, black paint.

The shutter 104 rotates together with the opening degree indicator 45 around the axis of the input shaft 47 with the rotation of the rotary valve body 12, and the rotary valve body 12 of the three-way valve 10 is in the first open state shown in FIG. , A second open state shown in FIG. 7 and a third open state shown in FIG. 8 while being sequentially rotated, a position for shielding the open port display mark 103 on one side shown in FIG. The shutter 104 is sequentially moved to a position where none of the open port display marks 101, 102, 103 shown in FIG. 3B is blocked and a position where the open port display mark 102 on the other side shown in FIG. The opening state is displayed by an opening display pattern expressed by a combination of open port display marks 101, 102, 103 that are exposed outside.

The operating device 41 is provided with a branch display mark 105 together with an open port display mark 101 corresponding to the central valve box internal flow passage 14A, and the head is covered with the opening display plate 100 and the shutter 104. A protective cap 106 is attached.

The operation of the above structure will be described below. As described above with reference to FIG. 5, the output shaft carrier 58 is rotated by the rotation of the input shaft 47 via the gear train, and the rotary valve body 12 is rotated and operated in the range of 0 to 180 ° via the valve rod. Thus, as shown in FIG. 6, a first open state in which the first in-valve-box flow path 14A and the second in-valve-box flow path 14B communicate with each other, and as shown in FIG. A second open state (fully open state) in which the inner flow passage 14A communicates with the second inner valve box flow passage 14B and the third inner valve box flow passage 14C, and as shown in FIG. Inner channel 14A and third valve box inner channel 14C
And the third open state in which the and are communicated with each other.

On the other hand, due to the revolution of the first planetary gear 51, the opening carrier 63 rotates integrally with the gear shaft 54 around the axis of the input shaft 47, and the opening sun gear 64.
The rotation of the intermediate large gear 65 and the intermediate small gear 66 rotates about the axis of the gear shaft 68, and the rotation of the intermediate small gear 66 rotates the sleeve portion 46 integrally with the opening gear 67.
By rotating the sleeve portion 46 and the shutter 104 at the same rotation angle as the rotation angle of the output shaft carrier 58, the rotary valve body 12 is either the second internal valve box passage 14B or the third internal valve box passage 14C. The state in which one of them is closed corresponds to the state in which the shutter 104 shields the open port display marks 102, 103 corresponding to the flow path in the valve box, and the rotary valve body 12 determines which flow path in the valve box 14A, 14B. , 14C does not close, and the shutter 104 does not block any of the open port display marks 101, 102, 103.

Therefore, as shown in FIG. 3A, the open port display mark 103 on one side is shielded by the shutter 104 and the remaining two open port display marks 101, 102.
Is exposed, and the opening degree display pattern represented by the combination of the open port display mark 102 on the other side and the open port display mark 101 on the center is the flow path 14B in the valve box on the other side and the flow path 14A in the center valve box. First open state (one side closed)
Indicates.

As shown in FIG. 3B, all the open-port display marks 101, 102, 103 are displayed on the shutter 10.
Exposed from 4 and exposed, 3 open port display marks 10
The opening degree display pattern represented by the combination of 1, 102, and 103 is the flow path 14A, 14 in all three valve boxes.
The 2nd open state (full open state) which B and 14C connect is shown.

As shown in FIG. 3C, the open port display mark 102 on the other side is blocked by the shutter 104, and the remaining two open port display marks 101 and 103 are exposed.
The opening degree display pattern expressed by the combination of the open port display mark 103 on the one side and the open port display mark 101 on the center is the flow path 14C in the valve box on the one side and the flow path 1 in the center valve box.
4A shows a second open state in which 4A communicates (one side closed state).

Therefore, the open / closed state of the valve of the three-way valve 10 can be displayed by an opening degree display pattern composed of a combination of the open port display marks 101, 102, 103 exposed outside the shutter 104, and the operator can open the valve. The open / closed state of the valve can be intuitively recognized by visually recognizing the degree display pattern. Open port display mark 101,
Since 102 and 103 are present on the back surface of the opening degree display plate 100, damage and stain can be prevented, and the open port display mark 10
The open-port display marks 101, 102, and 103 can be made easy to visually recognize by coloring the light-colored (yellow) 1, 102, and 103 so as to stand out from the dark-colored (black) shutter 104.

By mounting the protective cap 106 on the head portion of the operating device 41 so as to cover the opening display plate 100 and the shutter 104, the opening cap 10 is covered by the protective cap 106.
0 is protected from dirt and muddy water, and a protective cap 1
Open port indication marks 101, 10 by removing 06
It is possible to maintain the state in which 2 and 103 are easily visible at all times.

When the three-way valve 10 is buried in the ground, the embedding direction of the three-way valve 10 and the piping form connected to the three-way valve 10 cannot be visually recognized, and the three open-port display marks 10 are shown.
When all of 1, 102, and 103 are exposed out of the shutter 104, the left and right open port display marks 10
Open port display mark 101 in the center sandwiched between 2 and 103
Can be recognized as corresponding to the flow path 14A in the valve box in the center of the three-way valve 10.
When 2 is shielded by the shutter 104 and the remaining two open port display marks 101, 103 are exposed, it is clear which of the open port display marks 101, 103 corresponds to the central valve box flow passage 14A. Therefore, the current opening state of the three-way valve 10 cannot be immediately cut off.

Therefore, by providing the branch display mark 105 on the operating device 41 corresponding to the flow path 14A in the valve box at the center of the three-way valve 10, the operator visually recognizes the branch display mark 105 so that the three-way valve 10 can be seen. The burying direction can be easily recognized, and the open state of the three-way valve 10 at the present can be immediately cut off by immediately recognizing the open port display mark 101 corresponding to the central valve box inner channel 14A.

[0040]

As described above, according to the present invention, the open / closed state of the valve in the three-way valve is displayed by the opening degree display pattern consisting of the combination of the display marks exposed outside the shutter. By visually recognizing the display pattern, you can intuitively recognize the open / closed state of the valve, and by displaying the open port display mark on the back of the opening display plate, you can prevent damage and stains on the open port display mark. Since the open port display mark has a distinctive color with respect to the shutter, the open port display mark is easily visible. The protection cap protects the opening degree display plate from dust, muddy water, etc., and by removing the protection cap during operation, it is possible to maintain the open port display mark in a state that is always easy to see. By visually recognizing the branch indication mark provided on the controller corresponding to the center port of the three-way valve, the embedding direction of the three-way valve can be easily recognized and the open port indication mark corresponding to the center port can be immediately displayed. The current opening state of the three-way valve can be immediately cut off by recognizing.

[Brief description of drawings]

FIG. 1 is a plan view of an operating device according to an embodiment of the present invention.

FIG. 2 is a front view of the operating device.

3A to 3C are explanatory diagrams showing operating states of an operating device.

FIG. 4 is a cross-sectional view of main parts of the operating device.

FIG. 5 is a cross-sectional view of a conventional operating device.

FIG. 6 is a cross-sectional view showing a first open state of the three-way valve.

FIG. 7 is a cross-sectional view showing a second open state of the three-way valve.

FIG. 8 is a sectional view showing a third open state of the three-way valve.

[Explanation of symbols]

10 three-way valve 11 valve box 12 rotary valve 14A, 14B, 14C Valve box flow path 15 valve chamber 16B, 16C valve box seat 17 Valve body flow path 18A, 18B, 18C opening 19 Disc seat 41 Operation machine 42 cases 43 cover 46 Sleeve 47 Input axis 100 opening display plate 101, 102, 103 Open port display mark 104 shutter 105 branch display sign 106 protective cap

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuhiko Bessho             Osaka Prefecture Osaka City Chuo-ku Hiranomachi 4-1-2 Large             Within Osaka Gas Co., Ltd. (72) Inventor Hitoshi Onishi             Osaka Prefecture Osaka City Chuo-ku Hiranomachi 4-1-2 Large             Within Osaka Gas Co., Ltd. (72) Inventor Shoichi Kuroda             Osaka Prefecture Osaka City Chuo-ku Hiranomachi 4-1-2 Large             Within Osaka Gas Co., Ltd. (72) Inventor Masaaki Asai             Osaka Prefecture Osaka City Chuo-ku Hiranomachi 4-1-2 Large             Within Osaka Gas Co., Ltd. F-term (reference) 3H065 AA06 BA01 BA05 BB02 BC01                       BC03 BC04 BC06 BC11                 3H067 AA12 CC48 DD03 DD32 DD45                       EA02 EC07 ED18 FF11

Claims (4)

[Claims] 1. A three-way valve having three ports opened around the shaft center of the valve rod at predetermined angular intervals, and the valve body for opening and closing the port is rotated by rotational driving of the input shaft of the operating machine. An opening display plate is fixedly arranged around the opening display plate, and three open port display marks corresponding to each port are provided at predetermined angular intervals on the opening display plate. The shutter that rotates around the axis of the shield shields the open port display mark on one side from the position that shields the open port display mark on one side while the valve body rotates from one end side to the other end side of the rotation range. An opening degree display structure for a three-way valve, wherein the opening degree state is displayed by an opening degree display pattern expressed by a combination of open port display marks which are provided so as to be movable to a position and exposed from the shutter. 2. The opening display plate is formed of a transparent resin material, the open port display mark colored in bright color is displayed on the back surface of the opening display plate, and the shutter is colored in dark color. The structure for displaying the opening degree of the three-way valve according to Item 1. 3. A three-way valve opening degree display structure according to claim 1, wherein a head opening of the operating device is fitted with a protective cap covering the opening degree indicating plate and the shutter. 4. The operating device is provided with a branch display mark together with an open port display mark corresponding to a central port located between the ports on both sides. 3 way valve opening display structure.