JP2682835B2 - Valve opening indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a valve opening indicating device, and for example, confirms the opening of a valve body such as a gate valve from the outside of an operating portion. The present invention relates to an indicating device.

(Prior Art) A conventional valve opening indicating device of this type is rotatably supported by a valve body for advancing and retracting a valve body, as described in, for example, JP-A-57-25581. An operation handle is attached to the valve shaft, and an opening degree indicator tube, which is located on the back side of the operation handle and has the valve shaft inserted therethrough, is fixed to the upper part of the valve body, and the opening degree indicator screwed into the threaded portion of the valve shaft is indicated. When the indicator protrusion protruding from the ring is inserted and protruded through the axial slit of the valve shaft formed in the opening indicator cylinder and the valve shaft is rotated by the rotating operation of the operation handle, the valve element opens and closes. At the same time, the opening indicator ring screwed onto this valve shaft is advanced and retracted by the engagement of the protrusion and the slit of the opening indicator ring, and the opening of the valve element can be indicated at the forward and backward positions of this opening indicator ring. The structure was adopted. In this valve opening indicating device having the conventional structure, the indicating protrusion of the indicating ring for indicating the opening is located on the back side of the operation handle, and the back side of the operation handle must be looked into. Is not easy to check, and there is a problem that the workability of opening and closing the valve body is poor.

Further, in the conventional diaphragm valve, a structure in which an opening indicator is provided above the operation handle is known.
In this structure, since the advance / retreat of the valve element is directly transmitted to the opening indicator, there is a problem that the height of the opening indicator increases as the diameter of the valve increases.

(Problems to be Solved by the Invention) In the opening degree indicating device having the structure in which the indicating protrusion of the opening degree indicating ring is arranged on the back side of the operation handle, it is not easy to confirm the degree of opening, and the workability of opening and closing the valve element is reduced. Poorly, and in the structure in which the opening indicator is provided above the operation handle, there is a problem that the height of the opening indicator becomes high.

The present invention has been made in view of the above problems, and provides a valve opening degree indicating device capable of easily confirming the opening degree of a valve element, having good opening and closing operability of the valve element, and being small in size. .

[Configuration of the invention]

(Means for Solving the Problems) A valve opening indicating device according to the present invention allows a valve shaft for opening and closing the valve body to freely rotate in a shaft hole of a valve body that forms a fluid passage opened and closed by the valve body. The shaft is supported, and an operation handle is attached to the protruding end of the valve shaft from the valve body. Also,
An axial fitting hole is formed on the protruding end side of the valve shaft from the valve body, and a key groove penetrating the outer peripheral surface is formed on the inner end side of the fitting hole. An actuating body having a threaded portion screwed into a threaded groove formed on the inner circumference of the valve body is passed through the key groove of the valve shaft so that the actuating body can move forward and backward. The opening indicator is inserted into the fitting hole of the shaft, and the tip of the opening indicator is projected from the fitting hole. The opening indicator is advanced and retracted according to the opening of the valve body. The opening degree of the valve element can be confirmed by the degree of protrusion of the indicator.

(Operation) In the valve opening degree indicating device of the present invention, the valve shaft is rotated by the rotation operation of the operation handle, and the valve body opens and closes the fluid passage by the rotation of the valve shaft. By the rotation of the valve shaft, the operation is advanced and retracted by the screw engagement of the threaded portion of the actuating body penetratingly engaged with the key groove of the valve shaft and the screw groove of the inner circumference of the shaft hole of the valve body. The fixed opening indicator moves back and forth through the fitting hole of the valve shaft, and the opening degree of the valve member can be confirmed from the surface side of the operation handle by the amount of protrusion of the opening indicator from the fitting hole of the valve shaft.

Embodiment The configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a valve body, a fluid passage 2 is formed in the valve body 1, and a valve body 3 for opening and closing the fluid passage 2 is formed in the valve body 1 in a direction orthogonal to the fluid passage 2. A valve seat hole 4 is formed. A screw hole 5 is formed in an upper portion of the center of the valve body 3, and a lower screw portion 7 of a valve shaft 6 is screwed into the screw hole 5. A cylindrical portion 8 is integrally formed on the valve body 1 so as to surround the valve seat hole 4, and engages with an engagement groove 9 formed on the inner periphery of the cylindrical portion 8 to prevent rotation. A joint portion 10 is formed on the valve body 3, and the engagement between the engagement portion 10 and the engagement groove 9 causes the valve body 3 to move forward and backward while being prevented from rotating, thereby opening and closing the fluid passage 2. There is.

The upper portion of the valve shaft 6 is rotatably supported in a liquid-tight manner by interposing a seal ring 12 on a shaft support plate 11 that liquid-tightly closes an upper opening of the tubular portion 8.

A lid 13 is liquid-tightly attached to the upper surface of the tubular portion 8 of the valve body 1, and a shaft groove 14 of the lid 13 is provided with a screw groove 15 having a smaller screw pitch than the screw hole 5 of the valve shaft 6. Has been formed. The valve shaft 6 is inserted through the shaft hole 14 of the lid 13 and protrudes outward from the valve body 1, and the operation handle 16 is attached to the protruding end of the valve shaft 6 from the valve body 1. .

An axial fitting hole 17 is formed on the protruding end side of the valve shaft 6 from the valve body 1, and a key groove 18 penetrating the outer peripheral surface is formed on the inner end side of the fitting hole 17. . An actuating body having screw portions 19 at both ends, which are screwed into screw grooves 15 formed in the inner periphery of the shaft hole 14 of the lid body 13 of the valve body 1, in the key groove 18.
20 penetrates the valve shaft 6 so as to be able to move back and forth in the axial direction. As shown in FIGS. 2 and 3, an inner end surface of a rod-shaped opening indicator 22 is inserted into the fitting hole 17 of the valve shaft 6 through a screw projection 21 provided in the central portion of the operating body 20. Screw hole 23 formed in
Are fixed by screwing together, and the opening indicator 22 is
It is inserted into the fitting hole 17 of the above so as to be able to move back and forth. The tip of the opening degree indicator 22 is projected from the fitting hole 17 to the central position of the operation handle 16.

The screw groove 15 of the shaft hole 14 and the screw portion 19 of the actuating body 20 are screwed in the same direction as the screw groove 5 of the valve body 3 and the valve shaft 6 are screwed together. The direction is the same as the forward / backward direction of the opening degree indicator 22.

Further, 24 is a cap made of a transparent material, which is screwed and fixed to the upper end of the valve shaft 6. On the outer side of the end portion of the cap 24, a tightening operation portion 25 such as a hexagonal wrench for screwing the cap 24 onto the valve shaft 6 is formed. The projection amount of the opening degree indicator 22 can be confirmed from the outside of the cap 24, and a scale is displayed on the cap 24.

 Next, the operation of this embodiment will be described.

The valve shaft 6 is rotated by the rotation operation of the operation huddle 16, and the valve body 3 screwed onto the valve shaft 6 is stopped by the rotation of the valve shaft 6 to move forward and backward to open and close the fluid passage 2. When the valve shaft 6 rotates, the actuating body 20 that engages with the key groove 18 of the valve shaft 6 through
The actuating body 20 is advanced and retracted along the key groove 18 by the threaded portion 19 of the valve body and the thread groove 15 on the inner periphery of the shaft hole 14 of the valve body 3 being screwed together.
The opening indicator 22 fixed to 20 moves forward and backward through the fitting hole 17 of the valve shaft 6, and the projection amount of the opening indicator 22 from the fitting hole 17 of the valve shaft 6 is visually confirmed through the cap 24 to operate. The opening degree of the valve body 3 can be confirmed from the front surface side of the handle 16.

Further, the coupling between the opening degree indicator 22 and the actuating body 20 is not limited to the screw-in adhesion, but as shown in FIG. 4, it is fitted into the fitting groove 26 formed in the end face of the opening degree indicator 22 and the projection 27 is formed. It can also be fixed at.

Further, as shown in FIG. 5, the actuation body 20 is formed in an annular shape, and a threaded portion 19 to be screwed into the thread groove 15 of the shaft hole 14 is formed on the outer circumference of the actuation body 20. It is also possible to provide a structure in which a diametrical engagement portion 28 that engages with the key groove 18 of the valve shaft 6 is provided, and the opening degree indicator 22 is fixed to this engagement portion 28.
With this structure, wear of the screw portion 19 can be reduced.

〔The invention's effect〕

According to the present invention, the opening degree of the valve element can be confirmed by the opening degree indicator that moves forward and backward at the front side position of the operation handle, the operability is good, and the actuating body that advances and retracts the opening degree indicator is screwed Therefore, it is possible to reduce the amount of advance and retreat of the valve disc, and even with a valve with a large diameter, the amount of protrusion of the opening indicator can be reduced and it can be made compact
Furthermore, since the opening indicator is provided outside the valve body of the valve shaft,
There is no risk of leakage of fluid passing through the fluid passage.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a valve showing an embodiment of the present invention,
FIG. 2 is a cross-sectional plan view of the valve shaft and the opening degree indicator portion of the same as above. FIG. 3 is a perspective view of the same as above. FIG. 4 is a perspective view of the valve shaft and the opening degree indicator portion showing another embodiment. The drawing is a perspective view of an actuating member and an opening indicator showing another embodiment. 1 ... Valve body, 2 ... Fluid passage, 3 ... Valve body, 6 ... Valve shaft, 14 ... Shaft hole, 15 ... Thread groove, 16 ... Operation handle,
17 …… Mating hole, 18 …… Key groove, 19 …… Screw part, 20 …… Actuator, 22 …… Opening indicator.

Claims (1)

(57) [Claims] 1. A valve shaft for opening and closing the valve body is rotatably supported in a shaft hole of a valve body having a fluid passage opened and closed by the valve body, and a protruding end of the valve shaft from the valve body. An operation handle is attached to the valve shaft, an axial fitting hole is formed on the protruding end side of the valve shaft from the valve body, and a key groove is formed on the inner end side of the fitting hole to penetrate the outer peripheral surface. An actuation body having a threaded portion that is screwed into a threaded groove formed on the inner circumference of the shaft hole of the valve body is pierced through the key groove of the valve shaft so that it can advance and retreat, and the opening indicator fixed to the actuation body An opening degree indicating device for a valve, wherein the opening degree indicator is inserted into a fitting hole of a valve shaft and a tip of the opening degree indicator is projected from the fitting hole.