JP2000337547A - Opening/closing lever device of valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing lever device of valve capable of setting the valve opening degree finely, excellent in corrosion resistance, and having pawls and/or teeth unlikely to be broken even if an external force is applied. SOLUTION: The opening/closing lever device of valve includes a handle 8 installed rigidly on the upper part of a stem and opens and closes a flow passage by turning operation of the handle within the range 90 degs., wherein teeth form 3 of a gently sloping crest shape are provided in a sector form, and a rocking plate 1 furnished on its oversurface with graduations for indicating the degree of opening is fixedly attached to a top flange installed in the upper part of the valve body. At the end located ahead of a bearing part 12, a lever 16 furnished with a pawl part having at least two crests to make engagement with teeth form 3 formed on the rocking plate 1 is borne on the handle 8 is such a way as movable in the vertical direction and is put in elastic repulsive engagement with the handle 8 by a spring in a position behind the bearing part 12 of the handle 8. The valve is fixed with the desired degree of opening by putting the teeth form 3 in engagement with the pawl part 20 of the lever 8.

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 lever device suitably used for piping lines in chemical factories, water and sewage systems, agriculture / fisheries, and the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve opening / closing lever device which has excellent corrosion resistance and is hardly damaged even when subjected to external force.

[0002]

2. Description of the Related Art Conventionally, a valve opening / closing lever device used for a butterfly valve or the like is typically shown in FIGS. Referring to FIGS. 11 and 12, the handle 2 fixedly mounted on the upper portion of the stem 26 will be described.
An opening / closing lever device for a valve that opens and closes a flow path by rotating the valve 7 in a range of 90 degrees includes an outer peripheral portion of a metal locking plate 30 fixed to a mounting base 29 fixed to a top flange 28 of the valve. A metal lever 33 having a claw portion 32 engaged with the tooth shape 31 provided on the handle 27 is supported by the handle 27, and the claw portion 32 is generally one. Further, the locking plate 30
The planar shape and the cross-sectional shape of the tooth tip 34 of the tooth profile 31 and the toe 35 of the claw portion 32 of the lever 33 were rectangular.

[0003]

However, in the valve opening / closing lever device having the above-mentioned structure, the lever 33 has only one claw portion 32, and the wide claw portion always maintains the strength of the valve opening / closing lever device. 32 were required. with this,
The number of the tooth shapes 31 of the locking plate 30 is also limited, and the opening degree of the valve is set to about seven steps, so that a finer opening degree cannot be set. Moreover, the lever 33
And since the locking plate 30 is made of metal, if it is used in piping such as a chemical factory where a highly corrosive chemical solution flows,
Lever 33 and locking plate 3 in chemical solution or atmosphere
Thus, there is a problem that the opening of the valve cannot be set by operating the opening / closing lever of the valve. Furthermore, since the tip of the tooth profile 31 and the claw portion 32 are rectangular in both plane and cross-section, when an abnormal external force is applied to the handle 27, the tooth tip 34 of the tooth profile 31 of the locking plate 30 and the lever 33 There is a possibility that the toe 35 of the claw portion 32 may be damaged and the opening of the valve may not be set by operating the opening / closing lever of the valve.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object the purpose of being able to finely set the opening degree of a valve, being excellent in corrosion resistance, and having the claw portion even when subjected to external force. It is an object of the present invention to provide a valve opening / closing lever device in which a tooth profile and a tooth profile are hardly damaged.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is provided by rotating a handle fixedly mounted on an upper portion of a stem within a range of 90 degrees. In an opening and closing lever device for a valve that opens and closes a flow path, the valve has a plurality of gentle mountain-shaped teeth that are fixed to a top flange provided at an upper portion of the main body of the valve, and are provided in a fan shape. A locking plate provided with a scale for indicating the degree of opening of the valve, a pivotally supported vertically movable handle, and a spring resiliently engaged with the handle behind a shaft support portion of the handle by a spring; A first feature is that a lever provided with at least two claw portions is provided at an end in front of the shaft support portion so as to engage with a tooth profile provided on the locking plate.

A second feature is that the lever and the locking plate are made of synthetic resin.

The valve opening / closing lever device of the present invention is suitably used for a ball valve, a butterfly valve and the like, but the valve used is not particularly limited. Suitable materials for the locking plate and the lever include synthetic resins such as PPG, PVC, PP, and PVDF, but are not particularly limited as long as they have no problem in strength and corrosion resistance.

As the spring in the valve opening / closing lever device of the present invention, a spring, a plate spring, a plate rubber or the like is suitably used, but is not particularly limited as long as it is similar to a spring. Further, it is preferable to use a metal having corrosion resistance or a metal coated with a resin.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, but it is needless to say that the present invention is not limited to the embodiments. FIG. 1 is a front view including a partial cross section of a butterfly valve provided with a PPG valve opening / closing lever device of the present invention. FIG. 2 is a plan view of the locking plate. FIG. 3 is an enlarged view of the tooth profile of the locking plate. FIG. 4 is a sectional view taken along line AA of FIG.
FIG. 5 is an enlarged view of a main part of FIG. 4. FIG. 6 is a plan view of a portion excluding the valve main body of FIG. FIG. 7 is a plan view of the lever. 8 is a sectional view taken along line BB of FIG. 7, and FIG. 9 is an enlarged view of a main part of FIG. FIG. 10 is a bottom view of FIG.

In the drawing, reference numeral 1 denotes a shaft hole 2 provided at a central portion.
With the stem 24 penetrated through the
A substantially circular PP fixed to a top flange 26 provided at the top of a 0 mm butterfly valve body 25
It is a locking plate made of G. As shown in FIG.
Twenty-four tooth profiles 3 each having a fan-shaped gentle mountain shape are continuously provided on the peripheral surface over a range of about 120 degrees around the shaft hole 2, and both end portions of the continuously provided tooth profiles 3 protrude from the peripheral surface. And a stopper portion 4 having a rectangular shape in a plane. still,
The number of peaks of the tooth profile 3 can be freely set according to a desired opening degree. As shown in FIG. 3, the height and angle of the tooth profile 3 are 4 to 5 mm for the height h of the tooth profile 3 and 38 to 42 for the angle α.
When it is provided at an angle, good effects can be obtained in setting the degree of opening and strength. The lower end 5 of the tooth profile 3 is formed in a gentle curved surface toward the tooth tip. In other words, the entire tooth profile 3 has a rounded shape (see FIGS. 4 and 5). A shaft hole 2 for stem penetration is provided in the center of the locking plate 1.
The peripheral portion is provided with four screw holes 6 for fixing the locking plate at symmetrical positions around the shaft hole 2. Further, a scale 7 for indicating the opening of the valve is provided on the upper surface of the outer peripheral portion at a symmetrical position about the shaft hole 2 of the continuously formed tooth profile 3 over a range of about 90 degrees.

Reference numeral 8 denotes a handle made of PP provided in an inverted U-shaped cross section. The stem 24 is inserted into a stem insertion hole 9 provided in the front and is fixed to the stem 24 with bolts or the like. A pin insertion hole 10 is bored in the lateral direction behind the central portion of the handle 8 in the axial direction, and forms a shaft support portion 12 that supports a lever 16 described later by inserting a pin 11. A concave portion 14 for fitting and fixing the spring 13 is provided on the rear inner upper surface of the shaft support portion 12. At the center of the outer end of the handle 8, a pointer 15 indicating the opening of the valve is integrally provided so as to point to the scale 7 for displaying the opening of the valve (see FIG. 6).

Reference numeral 16 denotes a lever made of PPG. As shown in FIGS. 7 and 8, a pin insertion hole 17 is formed in a substantially central portion thereof, and a pin is inserted into the shaft support portion 12 of the handle 8. As a result, it is pivotally supported by the handle 8. A spring 1 is provided on a portion of the upper surface which is located slightly behind the pin insertion hole 17 and which faces the concave portion 14 provided inside the handle 8.
3 is provided with a convex portion 18 for fitting and fixing.
A spring 13 is provided in each of the concave portion 14 and the lever convex portion 18 of the handle 8.
The lever 16 is elastically engaged with the handle 8 by fitting and fixing both sides of the handle 8. Thus, the lever 16 is supported by the handle 8 so as to be vertically movable. The convex part 1
A locking lock hole 19 for opening and closing the valve is drilled in the lateral direction of the lever 16 further behind the lever 8. When a padlock (not shown) is hooked on the locking lock hole 19, the lever 16 moves up and down. To prevent That is, it is possible to prevent the lever from naturally moving due to some external force and the opening degree from changing without permission. 20 is lever 1
The ridges 6 are provided at the tips of the ridges 6. The ridges are formed in such a manner that the lines connecting the tops of the ridges are formed in a concave arc shape. It is formed in a gentle curved surface toward the tip. In other words, the entire claw portion 20 has a rounded shape. Claw part 2
The number of zeros should be at least two, preferably five to seven. By engaging the tooth form 3 of the locking plate 1 with the claw portion 20, the valve can be fixed at a desired opening.

The operation of this embodiment will be described below. First, the grip portion 22 of the handle 8 and the grip portion 2 of the lever 16
3 is gripped against the urging force of the spring 13, the lever 16
The front portion of the handle 8 moves downward from the shaft support portion 12, and the claw portion 20 of the lever 16 engaged with the tooth profile 3 of the locking plate 8 separates. Next, in this state, the handle 8 and the lever 16 are rotated to a desired opening of the valve, and when the lever 16 is released, the spring 13 fitted behind the handle 8 and the lever 16 resiliently moves the lever. 16 moves upward and the claw portion 20 becomes the tooth shape 3 of the locking plate 1.
And the valve is fixed. At this time, the opening degree can be finely set in 19 steps from full closing to full opening of the valve.

[0014]

The opening / closing lever device of the valve of the present invention has the above-described structure, and the following excellent effects can be obtained by utilizing this structure. (1) Fine opening of the valve can be set, and fine flow rate setting by the rotary valve is possible. (2) Even when an abnormal force is applied to the handle, the lever claw and the locking plate teeth do not break,
The valve opening can be set at all times without being disabled. (3) Can be used in piping such as chemical factories that flow highly corrosive chemicals, without being affected by fluids and atmosphere. The valve opening setting can be maintained at all times, and the flow rate setting does not change.

[Brief description of the drawings]

FIG. 1 is a front view including a partial cross section of a butterfly valve provided with a PPG valve opening / closing lever device of the present invention.

FIG. 2 is a plan view of a locking plate.

FIG. 3 is an enlarged view of a tooth profile of a locking plate.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an enlarged view of a main part of FIG. 4;

FIG. 6 is a plan view of a portion excluding a valve main body of FIG. 1;

FIG. 7 is a plan view of a lever.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is an enlarged view of a main part of FIG. 8;

FIG. 10 is a bottom view of FIG. 6;

FIG. 11 is a bottom view of a conventional valve opening / closing lever device.

FIG. 12 is a sectional view taken along line CC of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Locking plate 2 ... Shaft hole 3 ... Tooth shape 4 ... Stopper 5 ... Lower end of tooth shape 6 ... Screw hole 7 ... Opening display scale 8 ... Handle 9 ... Stem insertion hole 10, 17 ... Pin insertion hole 11 ... Pin 12 … Shaft support 13… Spring 14… Recess 15… Pointer 16… Lever 18… Protrusion 19… Locking hole 20… Claw 21… Toothed upper end 22, 23… Grip 24… Stem 25… Butterfly valve 26… Top flange

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H052 AA02 BA35 CD09 DA02 EA02 EA08 EA16 3H063 AA02 AA05 AA06 BB01 BB12 BB24 BB31 DA03 EE07 EE12 EE17 FF03 GG06 GG11 3H064 AA02 AA03 A01 BA01 BA05 BB02 BC06

Claims (2)

[Claims] An opening / closing lever device for a valve for opening / closing a flow path by rotating a handle fixedly mounted on an upper portion of a stem within a range of 90 degrees, a top flange provided on an upper portion of a main body of the valve. A locking plate having a plurality of gentle chevron-shaped teeth provided in a fan shape, and a scale for displaying the degree of opening of the valve provided on an upper surface, and a pivotally supported by a handle so as to be vertically movable. And a spring that is resiliently engaged with the handle behind the handle shaft support by a spring, and has at least two claw engagement with a tooth profile provided on the locking plate at an end portion ahead of the shaft support. An opening / closing lever device for a valve, comprising a lever provided with a portion. 2. The valve opening / closing lever device according to claim 1, wherein the lever and the locking plate are made of synthetic resin.