JP2577912Y2 - Control valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control valve and, more particularly, to a technique which is effective when applied to, for example, a diaphragm type control valve used for venting or switching air in a chemical solution.

[0002]

2. Description of the Related Art For example, as this type of manually operated control valve, there is known a structure in which a diaphragm or a bellows provided on a main shaft is pressed against a valve seat by the urging force of a spring to seat the valve.

[0003]

By the way, in the above-mentioned control valve, there is known a structure in which a main shaft is moved up and down by a screwing method by rotating a handle.
In the control valve having such a structure, there is a problem that the quickness of the opening and closing operation of the valve is poor.

In order to solve such a problem, a structure in which the main shaft is moved up and down by a cam mechanism to open and close the valve may be considered. Simplification, reduction in manufacturing cost, reduction in the number of parts, simplification of the structure, and improvement in operation reliability must be achieved.

It is an object of the present invention to provide a control valve capable of improving valve opening / closing operability and operation reliability, facilitating machining, reducing manufacturing costs, reducing the number of parts, and simplifying the structure. Is to do.

The above and other objects and novel features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

[0007]

Means for Solving the Problems Of the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

That is, the structure of the control valve of the present invention is a control valve in which a valve hole is opened and closed by raising and lowering a main shaft urged downward by urging means. A tapered portion formed and narrowed from the upper side to the lower side, and the tapered portion is positioned in the inner space portion so as to be able to move up and down along the axial direction thereof, and rotates around the axis of the tapered portion. A cam member, which is interposed between the inner peripheral surface of the inner space portion and the tapered portion, is in sliding contact with the inner peripheral surface and the tapered portion, and is held by the holding portion interposed between the cam member and the tapered portion. A sliding contact member which is held so as to be displaceable in the radial direction, wherein the inner peripheral surface of the inner space portion on the outer peripheral surface side of the tapered portion has an inner peripheral surface portion with a large distance from the outer peripheral surface of the tapered portion. Inner circumference smaller than this Are formed continuously along the circumferential direction, and when the inner peripheral surface portion having a large space is located on the sliding contact member side by the rotation of the cam member, the sliding contact member is formed by the tapered portion. When the inner peripheral surface portion having the smaller interval is pushed toward the inner peripheral surface portion side having the larger interval, and the inner peripheral surface portion having the smaller interval is located on the sliding contact member side, the inner peripheral surface portion having the smaller interval causes the sliding contact member to have the taper. It is a structure that is pushed out to the part side.

In this case, a radial cross section of the inner space portion is formed in a substantially rhombic shape, and a pair of the inner circumferential surface portion having a large space and a small inner circumferential surface portion are formed respectively. A structure in which a pair of members are provided to face each other can be adopted.

[0010]

According to the control valve of the present invention, when the inner peripheral surface of the tapered portion having a large distance from the outer peripheral surface is located on the sliding member side, the inner peripheral surface is moved downward by the urging force of the urging means. The sliding contact member is pushed out by the biased tapered portion toward the inner peripheral surface portion side where the interval is large, and the main shaft is set to the lowered position,
On the other hand, when the cam member is rotated from the lower position of the main shaft and the inner peripheral surface portion of the tapered portion with a small distance to the outer peripheral surface is located on the sliding contact member side, the inner peripheral surface portion of the small distance is The sliding contact member is pushed out to the tapered portion side, and the pushed-out sliding contact member causes the tapered portion to rise against the urging force of the urging means, and the main shaft is moved together with this.

As described above, according to the control valve of the present invention, the rotation of the cam member raises and lowers the main shaft reliably and quickly to open and close the valve. The inner space portion of the cam member is formed such that an inner peripheral surface portion having a large gap with respect to the outer peripheral surface of the tapered portion and an inner peripheral surface portion smaller than the inner peripheral surface portion are continuously formed along the circumferential direction. It has a structure that
The cam processing can be facilitated and the manufacturing cost can be reduced, and the number of parts can be reduced and the structure can be simplified by eliminating the need for thrust receiving means.

[0012]

1 is a sectional view showing a control valve according to an embodiment of the present invention. FIG. 2 is a schematic partial sectional view of the control valve. FIG. 3 is a schematic partial sectional view of the control valve. FIG. 5 is a schematic partial sectional view of the control valve, FIG. 5 is an explanatory view showing the relationship between the rotation angle of the cam member of the control valve and the position of the diaphragm, and FIG. 6 is a perspective view of the control valve.

The control valve in this embodiment is applied to a diaphragm-type manual control valve used for bleeding or switching air in a chemical solution.

As shown in FIG. 1, a valve body 2 to which a cover 1 is screwed has an input port 2A and an output port 2A.
B is opened, the input port 2A and the output port 2B
Can communicate with each other via the valve hole 2C.

A sleeve 3 is connected to the valve body 2, and a valve body 4 having a diaphragm 4A is provided at a connection portion between the valve body 2 and the sleeve 3 so as to be able to move up and down along the axial direction of the sleeve 3. Is provided.

A main shaft 5 is provided in the sleeve 3 so as to be able to move up and down along the axial direction, and a valve body 4 is fixed to a lower end side of the main shaft 5.

The main shaft 5 is urged downward by a spring 6 (urging means) in the sleeve 3, and the urging force causes the valve body 4 to be pressed against the valve seat of the valve hole 2C and seated. I have.

On the outer side of the upper end of the main shaft 5, there is formed a tapered portion 5A narrowing from the upper side to the lower diameter portion 5B.

On the other hand, a cap-shaped handle 7 as a manual operation member is provided on the upper end side of the sleeve 3 so as to be rotatable around the axis of the main shaft 5, and a display of the valve opening / closing operation is provided on the upper end surface of the sleeve 3. The open / close display plate 8 is fixed by pins 9.

As shown in FIGS. 1 and 6, a display window 7A is partially formed in an upper wall portion of the handle 7 and the display window 7A is closed by a see-through plate 10.

The indication of the valve opening / closing operation of the open / close display plate 8 can be seen through the display window 7A by a predetermined rotational position of the handle 7.

In the lower side of the handle 7, a substantially cylindrical cam member 11 made of metal such as stainless steel has a set screw 12.
The cam member 11 rotates around the axis of the tapered portion 5 </ b> A of the main shaft 5 with the rotation of the handle 7.

As shown in FIGS. 2 to 4, the inner space of the cam member 11 formed by cutting has a substantially diamond-shaped cross section in the radial direction.
The inner peripheral surface of the inner space portion of the cam member 11 on the outer peripheral surface side of the tapered portion 5A has an inner peripheral surface portion 11A with a large interval with respect to the outer peripheral surface of the tapered portion 5A, an inner peripheral surface portion 11B smaller than this, and a taper. A pair of the inner peripheral surface portion 11C, which is smaller than the inner peripheral surface portion 11A and larger than the inner peripheral surface portion 11B, is continuously formed in a curved shape along the circumferential direction.

As shown in FIG. 1, the tapered portion 5A of the spindle 5
Are located in the inner space of the cam member 11 so as to be able to move up and down along the axial direction thereof.

A pair of steel balls 13 (sliding members) are interposed between the inner peripheral surface of the inner space of the cam member 5 and the tapered portion 5A, and are slidably contacted with the inner peripheral surface and the tapered portion 5A. I have.

A pair of holding holes 3A (holding portions) are formed in the sleeve 3 so as to face each other at a position located between the inner peripheral surface of the inner space of the cam member 5 and the tapered portion 5A.
A pair of steel balls 13 are respectively held in the holding holes 3A so as to be displaceable in the radial direction of the main shaft 5, and are arranged to face each other via the tapered portion 5A.

On the upper part of the sleeve 3, a detent pin 1
4 is fixed.

The lower end of the opening of the cam member 11 is notched by a predetermined width in the circumferential direction, and the rotation angle of the handle 7 and the cam member 11 is regulated by projecting the detent pin 14 into the notch 11D. It has become so.

That is, by rotating the handle 7, both ends in the circumferential direction of the notch 11 D abut against the detent pins 14 and stop, so that the rotation angle of the handle 7 and the cam member 11 becomes a predetermined rotation angle ( In this embodiment, 9
0 degrees).

The handle 7 is prevented from coming out of the sleeve 3 by a retaining ring 15 fitted on the upper part of the sleeve 3.

Next, the operation of the present embodiment will be described.

For example, the valve opening / closing operation of the control valve of this embodiment is performed as follows.

FIGS. 1 and 2 show a state in which the rotation angle of the handle 7 and the cam member 11 is 0 degree. In this state, the tapered portion urged downward by the urging force of the spring 6 is used. 5A causes the steel ball 13 to move the cam member 11
The main shaft 5 is lowered by being pushed out to the inner peripheral surface portion 11A side of the inner space portion of the valve body, and the valve body 4 is pressed against the valve seat of the valve hole 2C by the lowered position of the main shaft 5 so that the valve hole is formed. 2C is closed.

When the handle 7 and the cam member 11 are rotated counterclockwise by a rotation angle θ degrees from such a closed state of the valve, as shown in FIG.
A separates from the steel ball 13 and the inner peripheral surface portion 11 of the cam member 11
B is displaced toward the steel ball 13 and pushes the steel ball 13 toward the tapered portion 5A of the main shaft 5, and the pushed steel ball 13 pushes up the tapered portion 5A against the urging force of the spring 6 to push the main shaft 5 forward. By raising 5, the valve body 4 separates from the valve hole 2C, and the valve hole 2C is opened.

As shown in FIG. 5, the control valve of this embodiment is
The time when the cam member 11 rotates by the rotation angle θ degrees is the time when the valve body 4 and the diaphragm 4 </ b> A move up.

Next, when the handle 7 and the cam member 11 are rotated by a rotation angle (90-θ) degrees and further counterclockwise, as shown in FIG.
B is separated from the steel ball 13 and its inner peripheral surface portion 11C is the steel ball 1
The main shaft 5 and the tapered portion 5A are pushed down by the biasing force of the spring 6, and the steel ball 13 is pushed out toward the inner peripheral surface portion 11C by the tapered portion 5A. As described above, the main shaft 5 is lowered from the state shown in FIG. 3 by the urging force of the spring 6, but as shown in FIG. 5, since the amount of lowering is small, the separated state of the valve body 4 from the valve hole 2C is maintained. Then, the valve hole 2C is opened.

The control valve of the present embodiment performs the valve opening / closing operation in this manner.

In this case, according to the control valve of this embodiment,
The rotation of the cam member 11 causes the main shaft 5 to move up and down reliably and quickly to open and close the valve, so that the valve opening and closing operability and operation reliability can be improved, and the inside of the cam member 11 can be improved. The space portion is formed by cutting with a substantially rhombic cross section in the radial direction, and the inner peripheral surface of the inner space portion of the cam member 11 on the outer peripheral surface side of the tapered portion 5A has an inner periphery with a large distance from the outer peripheral surface of the tapered portion 5A. The inner peripheral surface portion 1A, the inner peripheral surface portion 11B, which is smaller than the inner peripheral surface portion 11A, has a smaller distance from the outer peripheral surface of the tapered portion 5A than the inner peripheral surface portion 11A.
Since a pair of inner peripheral surface portions 11C larger than 1B are formed continuously in a curved shape along the circumferential direction, cam processing can be facilitated and manufacturing cost can be reduced. Further, the number of parts can be reduced and the structure can be simplified by eliminating the need for the thrust receiving means.

Although the invention made by the present inventors has been specifically described based on the embodiments, the invention is not limited to the above-described embodiments and can be variously modified without departing from the gist of the invention. Needless to say.

For example, in the above-described embodiment, the structure is such that the rotating operation on the handle 7 is manually performed. For example, in the present invention, such a rotating operation on the handle 7 is automatically performed by a predetermined power. It is also possible to adopt a structure made.

Further, the cam member 11 in the above embodiment is used.
Is made of metal such as stainless steel. For example, in the present invention, a cam member 11 made of resin can be used.

In the above-described embodiment, the sliding member is formed of a perfect spherical steel ball 13. However, in the present invention, for example, an elliptical spherical steel ball 13 may be used. is there.

[0043]

[Effects of the Invention] Of the ideas disclosed in the present application, the effects obtained by typical ones will be briefly described.
It is as follows.

(1) According to the control valve of the present invention, when the inner peripheral surface of the tapered portion, which has a large distance from the outer peripheral surface, is located on the sliding member side, the urging force of the urging means moves downward. The slidable contact member is pushed out by the biased tapered portion toward the inner peripheral surface portion side where the interval is large, and the main shaft is set to the lowered position,
On the other hand, when the cam member is rotated from the lower position of the main shaft and the inner peripheral surface portion of the tapered portion with a small distance to the outer peripheral surface is located on the sliding contact member side, the inner peripheral surface portion of the small distance is The sliding contact member is pushed out to the tapered portion side, and the pushed-out sliding contact member causes the tapered portion to rise against the urging force of the urging means, and the main shaft is moved together with this.

As described above, according to the control valve of the present invention, the rotation of the cam member raises and lowers the main shaft reliably and quickly to open and close the valve. The inner space portion of the cam member is formed such that an inner peripheral surface portion having a large gap with respect to the outer peripheral surface of the tapered portion and an inner peripheral surface portion smaller than the inner peripheral surface portion are continuously formed along the circumferential direction. It has a structure that
The cam processing can be facilitated and the manufacturing cost can be reduced, and the number of parts can be reduced and the structure can be simplified by eliminating the need for thrust receiving means.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a control valve according to an embodiment of the present invention.

FIG. 2 is a schematic partial sectional view of the control valve.

FIG. 3 is a schematic partial sectional view of the control valve.

FIG. 4 is a schematic partial sectional view of the control valve.

FIG. 5 is an explanatory diagram showing a relationship between a rotation angle of a cam member of the control valve and a position of a diaphragm.

FIG. 6 is a perspective view of the control valve.

[Explanation of symbols]

 Reference Signs List 1 cover 2 valve body 2A input port 2B output port 2C valve hole 3 sleeve 3A holding hole (holding portion) 4 valve body 4A diaphragm 5 main shaft 5A taper portion 5B small diameter portion 6 spring (biasing means) 7 handle 7A display window 8 opening and closing Display plate 9 Pin 10 Perspective plate 11 Cam member 11A Inner peripheral surface portion 11B Inner peripheral surface portion 11C Inner peripheral surface portion 11D Notch portion 12 Set screw 13 Steel ball (sliding contact member) 14 Detent pin 15 Stop ring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16K 31/524 F16K 7/16

Claims (2)

(57) [Scope of request for utility model registration] 1. A control valve for opening and closing a valve hole by raising and lowering a main shaft urged downward by an urging means, formed on an outer peripheral surface on an upper end side of the main shaft, and directed from an upper side to a lower side. A tapered portion that is narrowed and narrowed, and a cam member that rotates around an axis of the tapered portion, wherein the tapered portion is located in the inner space so as to be able to move up and down along the axial direction thereof, While being interposed between the inner peripheral surface and the tapered portion and slidingly contacting the inner peripheral surface and the tapered portion, the holding portion interposed therebetween is held so as to be displaceable in the radial direction of the main shaft. The inner peripheral surface of the inner space portion on the outer peripheral surface side of the tapered portion has an inner peripheral surface portion having a large space with respect to the outer peripheral surface of the tapered portion and an inner peripheral surface portion smaller than this. Formed continuously along the circumference of each other When the inner peripheral surface portion having a large interval is positioned on the sliding contact member side by the rotation of the cam member, the sliding contact member is moved toward the inner peripheral surface portion having the large interval by the tapered portion. When the small-interval inner peripheral surface portion is pushed out and located on the sliding contact member side, the small-interval inner peripheral surface portion pushes the sliding contact member toward the tapered portion side. Control valve. 2. A radial cross section of the inner space portion is formed in a substantially rhombic shape, and a pair of the inner peripheral surface portion having a large space and a small internal peripheral surface portion are formed. The control valve according to claim 1, wherein a pair of the control valves are provided so as to face each other.