JPH01242889A - Valve opening indicating device - Google Patents

Abstract

PURPOSE:To enable miniaturization by forming, in a valve spindle, a fitting hole with a keyway on the inner end side, and fitting, in the keyway, an operating body having thread parts to be screwed in the thread groove of a valve body, and by fixing an opening indicator projecting outside the valve body, to the operating body. CONSTITUTION:An axial directional fitting hole 17 is formed on the end side through which a valve spindle 6 is projected from a valve body 1. On the inner end side of this fitting hole 17, a keyway 18 is formed. In this keyway 18, an operating body 20 having on its both ends thread parts 19 to be screwed ln the thread groove 15 having been formed on the inner circumference of the spindle hole 14 in the cover body 13 of the valve body 1 is fitted in. One end of an opening indicator 22 is fixed to this operating body 20, and the other end of the opening indicator 22 is projected from the fitting hole 17 in the central position of an operating handwheel 16. Thus, the confirmation of the opening can be easily carried out, and the amount of projection of the indicator 22 can be reduced, so that the miniaturization of the device can be enabled.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a valve opening indicating device, for example, for checking the opening of a valve body such as a gate valve from the outside of the operating part. This invention relates to an indicating device that enables

(Prior Art) A conventional opening degree indicator 81 of this type of valve is rotatably supported by a valve body for moving a valve body forward and backward, as described in, for example, Japanese Patent Application Laid-Open No. 57-25581. An operating handle is attached to the valve stem, and an opening indicator cylinder located on the back side of the operating handle and inserted through the valve stem is fixed to the upper part of the valve body, and an opening indicator is screwed onto the threaded portion of the valve stem. An indicator protrusion protruding from the ring is inserted into an axial slit of the valve stem formed in the opening indicator tube, and when the valve stem is rotated by rotation of the operating handle, the valve body opens and closes and moves forward and backward. At the same time, the opening indicating ring screwed onto the valve shaft is moved forward and backward by the engagement between the protrusion and the slit of the opening indicating ring.
A structure was adopted in which the opening degree of the valve body could be indicated by the forward and backward positions of this opening degree indicating ring. In this conventional valve opening indicating device, the indicator protrusion of the indicator ring that indicates the opening is located on the back side of the operating handle, and it is necessary to look into the back of the operating handle to determine the opening of the valve body. It is not easy to check the valve body, and the opening and closing workability of the valve body is poor.

Furthermore, in conventional diaphragm valves, a structure in which an opening indicator is provided above the operating handle is known, but in this structure, the movement of the valve body is directly transmitted to the opening indicator, so When the diameter becomes larger, there is a problem in that the height of the opening degree indicator 81 becomes higher.

(Problems to be Solved by the Invention) With the 8-position opening indicator, which has a structure in which the indicator protrusion of the opening indicator ring is disposed on the back side of the operating handle, it is not easy to confirm the opening degree, and it is difficult to open and close the valve body. Moreover, the structure in which the opening indicator is provided at the top of the operating handle has the problem that the height of the opening indicator becomes high.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a valve opening degree indicating device that allows easy confirmation of the opening degree of the valve body, has good opening/closing operability of the valve body, and can be made compact.

[Structure of the invention]

(Means for Solving the Problems) The valve opening degree indicating device of the present invention rotatably attaches a valve shaft that opens and closes the valve body to a shaft hole of a valve body that forms a fluid passage that is opened and closed by the valve body. The valve shaft is pivotably supported, and an operating handle is attached to the end of the valve shaft protruding from the valve body. Further, an axial fitting hole is formed at the end of the valve shaft protruding from the valve body, and a keyway penetrating the outer peripheral surface is formed at the inner end of the fitting hole. Then, an actuating body having a threaded portion that is screwed into a threaded groove formed on the inner periphery of the shaft hole of the valve body is bolted through the key groove of the valve shaft so as to be able to move forward and backward, and an opening indicator fixed to the actuating body is inserted into the fitting hole of the valve stem, and the tip of the opening indicator protrudes from the fitting hole, and the opening indicator moves forward and backward according to the opening degree of the valve body. The opening degree of the valve body can be confirmed by the degree of protrusion of this opening degree indicator.

(Function) In the valve opening degree indicating device of the present invention, the valve shaft is rotated by rotation of the operating handle, and the valve body opens and closes the fluid passage by the rotation of the valve shaft. As the valve stem rotates, the threaded portion of the actuating body that penetrates into the keyway of the valve stem engages with the threaded groove on the inner circumference of the shaft hole of the valve body, causing the actuating body to move forward and backward. The opening indicator fixed to moves forward and backward through the fitting hole of the valve stem, and the opening degree of the valve body is confirmed from the surface side of the operating handle by the amount of protrusion of this opening indicator from the fitting hole of the valve stem. can.

(Example) 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, in which a fluid passage 2 is formed, and further in this valve body 1, a valve body 3 that opens and closes this fluid passage 2 in a direction orthogonal to the fluid passage 2. A valve seat hole 4 is formed.

A screw hole 5 is formed in the upper center of the valve body 3, and a lower screw portion 7 of the valve @6 is screwed into the screw hole 5.

A cylindrical portion 8 is integrally formed in the valve body 1 surrounding the valve seat hole 4, and is engaged with a retaining groove 9 formed on the inner circumference of the cylindrical portion 8 to prevent rotation. A fitting 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 without being prevented from rotating, thereby opening and closing the fluid passage 2. ing.

The upper part of the valve shaft 6 is rotatably supported in a fluid-tight manner by a shaft support plate 11 that fluid-tightly closes the upper opening of the cylindrical portion 8 with a seal ring 12 interposed therebetween.

Further, a lid 13 is liquid-tightly attached to the upper surface of the cylindrical portion 8 of the valve body 1, and a threaded groove 15 having a smaller thread pitch than the threaded hole 5 of the valve @ 6 is formed in the shaft hole 14 of the lid 13. It is formed. The valve shaft 6 is inserted through the shaft hole 14 of the lid body 13 and protrudes outward from the valve body 1, and an operating handle 16 is attached to the end of the valve iM6 that protrudes from the valve body 1. .

Further, an axial fitting hole 17 is formed on the side of the protruding end of the valve @ 6 from the valve body 1, and a key groove 18 penetrating the outer peripheral surface is formed on the inner end side of this fitting hole 17. . In this keyway 18, an actuating body 20 having one threaded portion at both ends that is screwed into a threaded groove 15 formed on the inner periphery of the shaft hole 14 of the lid 13 of the valve body 1 is attached to the shaft of the valve shaft 6. Send one message freely in any direction. As shown in FIGS. 2 and 3, this actuating body 20 has a threaded protrusion 21 protruding from the center of the valve shaft 6.
The rod-shaped opening indicator 22 inserted into the fitting hole 17 is screwed into the screw hole 23 formed on the inner end surface and fixed by adhesive. It is inserted into the matching hole 17 so that it can move forward and backward. The tip of the opening indicator 22 is made to protrude from the fitting hole 17 to the center position of the operating handle 16.

Note that the thread groove 15 of the shaft hole 14 and the threaded portion 1 of the actuating body 20
The screwing direction of the valve body 3 is the same as the screwing direction of the threaded groove 5 of the valve body 3 and the valve shaft 6, and the forward and backward direction of the valve body 3 and the opening degree indicator 2 are the same.
The advancing and retreating direction of No. 2 is the same direction.

Further, 24 is a cap molded from a transparent material, and is screwed and fixed to the upper end of the valve shaft 6. An operating portion 25 is formed on the outer side of the end of the cap 24 and is tightened by a hexagonal snapper or the like for screwing the cap 24 onto the valve shaft 6. The amount of protrusion of the opening indicator 22 can be checked from the outside of the cap 24, and a scale is displayed on the cap 24.

Next, the operation of this embodiment will be explained.

The rotation of the operating handle 16 rotates the valve shaft 6, and the rotation of the valve @6 prevents the valve body 3, which is screwed into the valve @6, from rotating and moves forward and backward, opening and closing the fluid passage 2.

And with the rotation of this valve @6, the key of this valve HJ6 is full 18
The actuating body 20 is moved forward and backward along the key pad 18 by the threaded engagement between one threaded portion of the actuating body 20 that is penetratingly engaged with the thread groove 15 on the inner circumference of the shaft hole 14 of the valve body 3, and the actuating body 20 is moved forward and backward along the key ring 18. The fixed opening indicator 22 moves back and forth through the fitting hole 17 of the valve stem 6, and the amount of protrusion of the opening indicator 22 from the fitting hole 17 of the valve stem 6 is measured through the cap 24? ! The opening degree of the valve body 3 can be checked from the surface side of the operating handle 16.

Furthermore, the connection between the opening indicator 22 and the actuating body 20 is not limited to screwing and adhesion, and as shown in FIG.
It is also possible to fit into the fitting groove 2G formed on the end face of the plate and fix it with the screw 27.

Furthermore, as shown in FIG. 5, the actuating body 20 is formed into an annular shape, and a threaded portion 19 is formed on the outer periphery of the actuating body 20 to be screwed into the thread 15 of the shaft hole 14. It is also possible to have a structure in which a diametrical engagement part 28 that engages with the key 18 of the valve @ 6 is provided, and the opening indicator 22 is fixed to this engagement part 28. In this structure, the opening indicator 22 is fixed to the engagement part 28. Can reduce wear.

〔Effect of the invention〕

According to the present invention, the opening degree of the valve body can be confirmed by the opening degree indicator that moves back and forth on the front side of the operating handle, and the operability is good.
In addition, the actuating body that advances and retreats the opening indicator can be made smaller than the advancing and retreating layers of the valve body because it is screwed together, and even with large diameter valves, the amount of protrusion of the opening indicator can be reduced, making it compact, and furthermore, the opening indicator can be made smaller. Since the indicator is provided on the outside of the valve body of the valve stem, there is no fear of leakage of fluid passing through the fluid passage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a valve showing one embodiment of the present invention;
FIG. 2 is a side view of the valve shaft and the opening indicator section, and FIG. 5 is a perspective view of the operating body and the opening indicator section showing another embodiment. 1. Valve body, 2. Fluid passage, 3. Valve body, 6. Valve stem, 14. Shaft hole, 15. Thread groove, 16. Operation handle, 17. Fitting hole, 18. ...V-groove, 19.. Threaded portion, 20.. Operating body, 22.. Opening degree indicator. March 25, 1986 Inventor: Nomura
Sho Patent Applicant Previous) η Kasei Kogyo Co., Ltd.
Munemasa Shima
See j King P-shisu ``゛2''~・ Tobi・Ryo・】・; N+---Ichifuku

Claims (1)

[Claims] (1) A valve shaft that opens and closes the valve body is rotatably supported in a shaft hole of a valve body that forms a fluid passage that is opened and closed by the valve body, and the end of the valve shaft that protrudes from the valve body is operated. A handle is attached, an axial fitting hole is formed at the end of the valve shaft protruding from the valve body, and a keyway penetrating the outer peripheral surface is formed at the inner end of the fitting hole. An actuating body having a threaded portion that is screwed into a threaded groove formed on the inner periphery of the shaft hole of the valve shaft is inserted through the key groove of the valve shaft so as to be able to move forward and backward, and an opening indicator fixed to the actuating body is inserted into the key groove of the valve shaft. 1. An opening indicating device for a valve, characterized in that the opening indicating body is inserted into a fitting hole, and the tip of the opening indicator projects from the fitting hole.