JPH094740A - Three-way port butterfly valve - Google Patents

Abstract

PURPOSE: To provide a plurality of different using modes throughout a wide range by a method wherein fluid resistance is reduced, reliable sealing ability is held, and a single actuator and two valve elements are combined together. CONSTITUTION: Two valve elements 32 are properly selectively arranged in the two spots of the three in-outlets of a body 30 having fluid in-outlets A, B, and C in three directions and an inner surface on which a corrosion resisting member 31 is mounted. The external extension valve rods of the arranged two valve elements are coupled to a single actuator in such a manner that the two valve elements 32 are opened and closed in such a state to keep a phase difference of approximately 90 deg. through a Scotch yoke 43 and roll pins 44 fixed at equal intervals on a rotation plate 42 driven by an actuator. Thus, since the two valve elements 32 is rotated in the reverse direction to the rotation direction of the actuator and in the direction in which one is opened and the other is closed, the use of different modes classified by application of divided flow and mixed flow and throughout a wide range is practicable through selection of the installation places of the two valve elements 32 and variation of the position of the roll pin 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butterfly valve which has fluid inlets and outlets in three directions and divides, mixes or controls with two valve bodies, and mainly liquids such as fresh water and seawater, gases such as air and gas. Alternatively, it is suitable for use as a switching valve or a control valve of a pipeline in which powders such as wheat flour and resin raw materials flow. Here, the split flow means one having a fluid inlet and two fluid outlets, and the mixed flow means one having a fluid inlet and two fluid outlets.

[0002]

2. Description of the Related Art A conventional valve having a three-way port is constructed by joining two butterfly valves 1 and 2 and a T pipe 3 as shown in FIG. And the valve rod 5 of the other butterfly valve 2 is connected by an appropriate connecting means 6 to drive the two butterfly valves in an interlocking manner, or, as shown in FIG. 11, a general-purpose sphere valve 7 And the elbow valve 8 are used together.

Further, as shown in FIGS. 12 (a) and 12 (b), a main body 12 having openings 11 and 11 protruding in four directions in a cross shape.
The valve shaft 13 is erected at the center of the valve so that the valve shaft 13 can rotate, and valve seat ridges 14, 14 that project diagonally across the inside of the main body 12 while intersecting with the bearing portion of the valve shaft 13 are provided. 90 on axis 13
There has already been devised a switching valve in which an elliptical butterfly 15 for contacting the outer side with the valve seat projections 14 and 14 is fixed every rotation, and the butterfly 15 is fully rotatable with respect to the main body 12. (See Japanese Utility Model Publication No. 38-3964) In the figure, 16 is a hard rubber lining layer, 17 is a handle for manual opening and closing, and 18 is a pointer.

Further, as shown in FIG. 13, the valve body is axially supported by a valve rod 26 penetrating the central portion of the main body 20 having the fluid inlet / outlet ports 21, 22 and 23 in three directions, and the outer diameter is made to be a perfect circle. The disc-shaped valve body 25 is formed, and the valve seats 24 are provided on the peripheral portions including the intersections of the fluid inlets and outlets in the three directions. The contact surfaces are provided on the peripheral portions of the valve seat 24 and the valve body 25. A sealing member made of an elastic body having a spherical shape is attached to the valve body 2
The Applicant has already devised a three-way butterfly valve that can divide or mix the outer diameter of 5 with the inner diameter of the fluid inlet / outlet ports 21, 22, 23 being 1.5 times or more. (Refer to Japanese Utility Model Publication No. 5-15663)

[0005]

In the prior art example shown in FIGS. 10 and 11, the weight of the main body is large, and there are problems in the cost of piping installation work and economical efficiency. Particularly, for driving the valve body. The link mechanism is exposed and cannot be used depending on the pipe installation location. Further, in recent various plants, there has been a problem that it is against the miniaturization and weight reduction of equipments and devices, and it is economically expensive.

Further, the conventional example shown in FIGS. 12 (a) and 12 (b) has the following problems. (I) If the valve body 15 is not elliptical, the entrance / exit (caliber) 11
The point that does not fit in more. (Ii) There is no concreteness as to how to process the inside of the elliptical valve plate 15 or the main body 12 in order to have a reliable sealing property which is an important element as a switching valve. (iii) The rubber lining layer 16 is provided because it is impossible to process the outer diameter of the valve body and the inner diameter of the main body for the above reasons, but the dimensional accuracy is uncertain without the processing.

Further, the conventional example shown in FIG. 13 has the following problems. (I) The valve outer diameter is 1.5 times or more the fluid inlet / outlet diameter when the fluid is divided or mixed, but the fluid passage area (opening) is slightly narrowed at the minimum magnification, causing fluid resistance. . (Ii) Control of the fluid, that is, D portion and E formed near the end portion of the valve body facing the inner surface of the main body at the intermediate opening degree of the valve body
At the part, collision of fluids and turbid flow occur, there is damage or aging of members in the part, and accurate control is difficult,
In addition, at the intermediate opening degree, there is no valve seat in the D portion, so that sealing is not performed. (iii) A sealing member made of an elastic body is attached only to the valve seat portion when the flow is divided or mixed, and the body material is required to have corrosion resistance against corrosive fluids such as seawater or gas. (Iv) It can be used only as a diversion or mixed flow valve (ON-OFF valve), but cannot be used as a control valve (control valve).

The present invention is intended to solve the above-mentioned drawbacks and problems in the prior art, and to reduce the fluid resistance in a three-way valve, and to collide the fluid even when the fluid is divided, mixed or controlled. It is also an object of the present invention to provide a three-way butterfly valve which has no turbulent flow and maintains a reliable sealing property, and which enables a plurality of different modes of use by combining one actuator and two valve bodies. I am trying.

[0009]

In order to achieve the above object, the invention of claim 1 is provided with two valve bodies in a main body having fluid inlets and outlets in three directions to perform switching and control of fluid flow paths. In a three-way butterfly valve that can be operated, the above 2
It is possible to properly install three valve bodies at the fluid inlets and outlets in three directions, and the extension valve rods of the two installed valve bodies are fixed to the scatch yoke and the rotating plate driven by the actuator. 1 via the roll pin
The above-mentioned two valve bodies are connected to each other by about 9 actuators.
It is characterized in that they are connected so as to open and close while maintaining a phase difference of 0 °.

The invention of claim 2 is characterized in that a seat ring is baked and integrally vulcanized and molded on the inner surface of the main body having fluid inlets and outlets in three directions.

According to the third aspect of the present invention, two valve bodies are provided in the main body having the fluid inlets and outlets in three directions, and the closing valve shaft is inserted into the remaining one valve rod hole. It is characterized by preventing leakage.

The invention according to claim 4 is characterized in that the actuator can be adjusted in closing degree when the valve is closed, regardless of whether the actuator is manual or automatic.

The invention according to claim 5 is characterized in that the main body is made of a light alloy or a synthetic resin, and the overall weight is made light.

[0014]

The present invention is configured as described above.
According to the invention of claim 1, the following action occurs. That is, in each valve element installed in any two locations of the fluid inlets and outlets in three directions, each extension valve rod has one through the scatch yoke and a plurality of roll pins fixed on the rotating plate. Since it is connected to the actuator, the direction of rotation of one actuator that drives the rotating plate is opposite to the direction of rotation of both valve bodies, and therefore when the actuator rotates clockwise. Causes both valve bodies to rotate together in the counterclockwise direction, and these two valve bodies have a phase difference (opening) of about 90 ° from each other such that when one valve opens, the other valve closes. Scratch yoke connected to the outwardly extending valve rod of the valve body installed in any two locations of the fluid inlets and outlets in three directions in advance so as to open and close with a difference in degree), and a plurality of roll pins on the rotating plate. Is selected and connected. At this time, the actuator is configured to repeatedly rotate the mounting shaft of the rotating plate by 90 °.

As described above, the flow direction, the mounting position,
Depending on the purpose of use such as split flow or mixed flow, two valve bodies are appropriately selected and installed at any two inlet / outlet portions of the body having fluid inlets / outlets in three directions to maintain a phase difference of approximately 90 °. As it is constructed to open and close, it can be modified locally.

According to the invention of claim 2, in addition to the above, the seat ring is baked and integrally vulcanized and molded on the inner surface of the main body, so that the inner surface of the main body is difficult to process before the seat ring vulcanization molding. By performing no processing, it is possible to reduce the processing man-hours, secure the sealing property of the fluid at the time of closing the valve by baking integral vulcanization, and prevent the seat ring from contracting in the inner diameter direction due to the intermediate opening.

According to the invention of claim 3, the main body is provided with 3
Since the valve body and the valve rod mounting boss are provided at one place, in addition to the appropriately selected two places, a valve stem hole for closing is inserted in the remaining one unused valve stem hole to prevent leakage to the outside. It can be prevented.

Further, according to the invention of claim 4, since the actuator is provided with the adjusting function capable of adjusting the degree of closure when the actuator is closed manually or automatically, one of the three-way butterfly valve is particularly effective. When the valve body is fully closed (thus, the other is fully open), it is possible to perform the minute opening adjustment required to maintain the reliable closing performance.

Further, according to the invention of claim 5, two valve bodies can be selectively installed in one body, and the body material is made of a light alloy such as aluminum die casting or a polycarbonate. Since such synthetic resin is used, the weight of the entire butterfly valve can be reduced.

[0020]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is an internal plan view of a three-way butterfly valve showing an embodiment of the present invention used as a shunt valve (ON-OFF valve) cut in a direction perpendicular to a valve rod, and FIG.
[Fig. 3] is an internal plan view showing a state in which it is also used as a mixed flow valve (ON-OFF valve).

In FIG. 1, the main body 30 has fluid inlets / outlets A, B, C in three directions, each of which has a body flange 30a, and a plurality of body centering holes are provided at the outer peripheral ends of the flanges 30a. The claw 30b is provided. The centering claw 30b is used for centering the mold when the elastic body is integrally vulcanized and molded on the inner surface of the main body. The three-way fluid inlet / outlet may have another shape instead of the flange shape.

On the inner surface of the body 30, the body corrosion resistant portion 31
However, a sealing member made of an elastic body is integrally vulcanized and mounted on the main body 30, a gland seal portion 31a is formed in the valve rod insertion portion, and the three-way butterfly valve is connected to the piping system. In this case, since the flange seal portion 31b serving as a gasket is provided between the pipe and the connection flange, the gasket packing is unnecessary. CR (neoprene), NBR (nitrile rubber) and the like are examples of the elastic body forming the main body corrosion resistant portion 31.

On the other hand, the valve body 32 has a valve body center shape in which the outer circumference of the valve body is on the same plane as the center of the valve rod, and the valve body 32 installed at the main body inlet / outlet C is in a fully opened state. Similarly, the valve body 32 of the entrance / exit B portion is in a fully closed state. In addition, in the same figure, the valve body is not installed in the entrance A part.

In order to improve the degree of sealing when the valve body 32 is closed, the thickness of the elastic body, which is in contact with the peripheral portion of the valve body when fully closed, is made thicker than that of the main body corrosion resistant portion 31, so that the valve seat convex portion 31c.
Is formed. In addition, the entrance / exit A where no valve is installed
5, the gland seal portion 31a is provided in the hole of the valve stem 33, and the sealing main valve stem 38a and the auxiliary valve stem 38b are inserted from the inner diameter side (inner side) as shown in FIG. The ends are fixed by a sealing nut 39.

FIG. 3 is a partially sectional plan view showing a state in which the actuator portion is attached, and FIG. 4 is a similar vertical sectional view.

In the figure, a rotary plate 42 is integrally connected to the actuator mounting shaft 41 via an implantation key 45, and is rotated in the same direction as the actuator mounting shaft 41 (counterclockwise in the figure). The rotating plate 42
, Four roll pin mounting holes 44a are formed at equal positions symmetrically with respect to the center in the radial direction, and the valve type (divisional flow, mixed flow), the installation position of the valve body, the rotation direction of the valve body, etc. 2 of these four roll pin mounting holes 44a
The installation position of each of the two roll pins 44 inserted into the position is determined.

In FIG. 3, the actuator mounting shaft 41
Fluid inlet / outlet B with respect to the rotating direction (counterclockwise in the figure)
The main valve stem joining portion 43a of the scatch yoke 43 connected to the valve stems 33 of the valve bodies 32 attached to the section C and the section C rotates in the opposite direction (clockwise in the figure). That is, the valve body 32 at the entrance / exit B is opened from the fully closed position in the drawing to the opening C.
The valve body 32 of the portion rotates in the closing direction from the fully opened position shown in the figure.

By the rotation of the rotating plate 42 as described above, the roll pin 44 fixed to the rotating plate 42 rotates along the groove of the scatch yoke 43, and the scatch yoke 43 forms the valve rod 33. With the main valve rod joint portion 43a fitted through the square hole as a shaft center, it rotates in the direction opposite to the rotation plate 42, and the rotation causes the valve body 32 to open or close. Will be seen.

Further, in FIG. 4, the actuator mounting shaft 41 is located equidistant from the valve rod 33 on the axis of the valve body 32 installed at any two positions of the fluid inlets / outlets A, B and C,
A shaft end is inserted into the main body 30 and supported by bearings 46 provided above and below, the mounting shaft 41 is smoothly rotated, and a gland packing 47 for preventing moisture and dust from the outside is embedded in the end portion.

On the other hand, the main valve rod 33a and the scatch yoke 43
Are connected to each other by the main valve rod joint 43a as described above to transmit the rotational force, and the head is fixed by the hexagon nut 36. Further, external leakage of fluid from the main valve rod 33a is prevented by the gland packing 34,
External leakage from the sub valve rod 33b at the lower end is prevented by bottom dust 37 through a gasket.

The main valve rod 33a connected to the scatch yoke 43 as described above is connected to the valve body 32 by the valve body joint portion 33.
The valve body 32 is integrally rotated by the rotation of the main valve rod 33a via the c, and the main valve rod 33a and the scatch yoke 43 are connected to each other at the main valve rod joint portion. 43a
Are connected by angular joining, and the scatch yoke 43 can be displaced by 90 ° depending on the valve type (divisional flow, mixed flow), the flow direction, and the like. Also, the main body 30 and the scatch yoke 4
A bearing 35 is provided in a gap between the bearing 3 and the bearing 3 to keep the rotation smoothly. The above-mentioned joining of the respective parts is not limited to corner joining, and other means may be used.

FIG. 6A shows the actuator mounting shaft 41.
The rotation (rotation angle) of the valve body 32 on the vertical axis, and the movement of the roll pin 44 accompanying the rotation of the actuator mounting shaft causes the movement (rotation) of the valve body 32 that rotates via the scatch yoke 43.
FIG. 4 is a diagram showing the horizontal axis of FIG. According to this, the characteristic feature is that the rotation of the valve body 32 is slower than the beginning of the rotation of the actuator mounting shaft 41, and the end of the valve body 32 also shows the same tendency.

Further, FIG. 3B is a flow rate characteristic diagram in which the vertical axis represents the valve opening of the butterfly valve and the horizontal axis represents the flow rate, and the movement of the actuator and the valve body in FIG. It can be seen that the relationship diagram is similar to the initial opening. Further, it shows a proportional band at the intermediate opening degree, and is suitable as a control valve.

FIGS. 7 to 9 show two valve bodies 32a, 3 which are mounted at two positions among the three fluid inlets and outlets in three directions.
2b and the roll pins 44a, 44b on the rotating plate 42 are connected via a scatch yoke (not shown), and these two valve bodies are opened and closed with a phase difference of approximately 90 °. FIG. 7 (a) is an operation explanatory view showing six modes.
In the drawing on the left side of the figure, the valve bodies 32a and 32b attached to the inlets and outlets C and B are shown by the roll pins 44a and 44 on the rotating plate 42.
b shows the state where the actuator mounting shaft 41 starts to move 90 ° in the arrow direction (counterclockwise direction) when connected through a not-shown scatch yoke, and the diagram on the right side of the figure shows 90 ° rotation. It shows the state when it has finished.
As a result, the valve body 32a rotates clockwise from open to closed, and the valve body 32b rotates clockwise from closed to open. In the figure, the hatched valve element 32b represents the main valve, and the other valve element 32a represents the slave valve. In this case, the main valve is a seal holding valve that maintains a reliable sealed state at each position, and the slave valve is similar to the main valve, which is not required to have the sealing property of the main valve. Similarly, in the figure on the right side of the figure, when the shaft 41 is rotated 90 ° in the arrow direction (clockwise direction), both valve bodies 32a and 32b rotate counterclockwise and return to the position on the left side again. Is shown. Further, FIG. 2B shows a state in which the open / closed states of the two valve bodies are reversed as compared with the above-described FIG.

In FIGS. 8A and 8B, the two valve bodies 32a and 32b are attached to the fluid inlets and outlets C and A, and the roll pin 4 is used.
4a and 44b are respectively connected via scatch yokes (not shown) to show the open / closed state of each valve element when the actuator mounting shaft 41 is rotated in the direction of the arrow.
It is an operation explanatory view similar to (b).

Further, FIGS. 9A and 9B show two valve bodies 3
2a and 32b are attached to the fluid inlets and outlets A and B, respectively connected to the roll pins 44a and 44b via a scatch yoke not shown, and the actuator attachment shaft 41 is
FIG. 8 is an operation explanatory view similar to FIGS. 7A and 7B, showing the open / closed state of each valve element when it is rotated in the arrow direction.

The present invention has the following six use modes.
There are a case of using the divided flow state shown in FIG. 1 and a case of using the mixed flow state shown in FIG. 2, respectively, and 12 kinds of different combinations (use modes) are possible by combining them.

In the above-described embodiment, the actuator used in the present invention has an adjusting function capable of adjusting the degree of closure when the valve is closed regardless of manual or automatic operation. In the valve, when one valve body is fully closed, it is possible to perform a minute degree of closure adjustment required to maintain a reliable closing property.

Further, the main body material is made of a light alloy such as aluminum die casting or a synthetic resin such as polycarbonate so that two valve bodies can be selectively installed in one main body. Combined with this, the total weight of the butterfly valve can be reduced.

According to the above-mentioned embodiment, the following effects can be obtained. (I) Since the scatch yoke 43 is not exposed and is hermetically sealed, by changing the position of the roll pin 44, the rotation direction of the valve body, the roles of the main valve and the slave valve, the split flow and the mixed flow can be widely used. In addition, it is possible to take appropriate measures locally.

(Ii) Since the elastic body 31 having corrosion resistance is integrally vulcanized and molded on the inner surface of the main body 30, there is no peeling or damage of the elastic body due to the fluid, and the life can be extended.

(Iii) One unused valve rod hole in the three-way port can be sealed by the sealing valve rods 38a and 38b, so that leakage at this portion can be easily prevented. .

(Iv) The butterfly valve can be used as an on-off valve by fully closing one of the two valve bodies and fully opening the other, and by using both valves in a half-open state,
It can be used as a control valve.

[0044]

As described above, according to the present invention,
According to the invention of claim 1, in a three-way butterfly valve in which two valve bodies are provided in a main body having fluid inlets and outlets in three directions so that fluid flow path switching and control can be performed, the two valve bodies are provided. The extension valve rods of the two installed valve bodies can be appropriately selected and installed at the fluid inlets and outlets in three directions, and each of them has a scatch yoke and a plurality of roll pins fixed on a rotating plate driven by an actuator. Through,
By connecting the two valve elements to one actuator so as to open and close while maintaining a phase difference of approximately 90 °, the rotational direction of the valve element, the main valve and the slave valve are changed by changing the position of the roll pin. It can be used in a wide range of roles such as roles and uses of split flow and mixed flow, and can be changed locally.

Further, in the invention of claim 2, the seat ring is baked and integrally vulcanized and molded on the inner surface of the main body having the fluid inlets and outlets in three directions, so that the processing man-hours are reduced and the fluid sealing property when the valve is closed is improved. It is ensured and it is possible to prevent the seat ring from being peeled off or damaged in the inner diameter direction due to the intermediate opening.

Further, in the invention of claim 3, two valve bodies are provided in the main body having fluid inlets and outlets in three directions, and the remaining 1
Since the closing valve shaft is inserted into the valve rod hole at the location, it is possible to easily prevent external leakage from the valve rod hole at the inlet / outlet portion where the valve body is not installed.

Further, according to the invention of claim 4, it is possible to improve the closing reliability of the main valve by enabling the degree of closing to be adjusted when the valve is closed regardless of whether the actuator is manual or automatic.

According to the fifth aspect of the present invention, since the constituent material of the main body is made of light alloy or synthetic resin, the total weight of the butterfly valve can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional plan view in a direction perpendicular to a valve rod when a three-way mouth butterfly valve according to an embodiment of the present invention is used as a flow dividing valve.

FIG. 2 is a partial cross-sectional plan view similar to FIG. 1 when it is also used as a mixed flow valve.

FIG. 3 is a partial cross-sectional plan view showing a state in which an actuator unit is attached.

FIG. 4 is a vertical cross-sectional view showing a state in which an actuator unit is attached.

5 is a sectional view of the sealing valve rod portion in FIGS. 1 to 3. FIG.

FIG. 6 (a) shows the movement of the actuator on the vertical axis,
FIG. 4 is a rotational relationship diagram of the actuator and the valve body, in which the horizontal axis represents the movement of the valve body, and FIG.
It is a flow-rate characteristic diagram of the valve body which showed the flow rate on the horizontal axis.

7 (a) and 7 (b) are operation explanatory views showing the rotational relationship between the actuator and the two valve bodies and the position of the roll pin.

FIG. 8 is an explanatory view of the same action as FIG. 7, except that the mounting positions of the two valve bodies are different.

FIG. 9 is an explanatory view of the same operation as in FIGS. 7 and 8 except that the mounting positions of the two valve bodies are different.

FIG. 10 is a side view showing a conventional example.

FIG. 11 is a cross-sectional view showing a conventional example.

FIG. 12 is a cross-sectional view showing a conventional example, (b) of FIG.
It is -b sectional drawing.

FIG. 13 is an operation explanatory view of a conventional example.

[Explanation of symbols]

 30 valve body 31 main body anticorrosion portion 32 valve body 33 valve rod 33a main valve rod 33b auxiliary valve rod 33c valve body joint portion 33d scatch yoke joint portion 34 gland packing 35 bearing 36 hexagon nut 37 bottom lid 38a sealing main valve rod 38b Sealing auxiliary valve rod 39 Sealing nut 40 Actuator lid 41 Actuator mounting shaft 42 Rotating plate 43 Scatch yoke 43a Main valve rod joint 44 Roll pin 44a Roll pin mounting hole A, B, C Fluid inlet / outlet

Claims (5)

[Claims] 1. A three-way butterfly valve in which two valve bodies are provided in a main body having fluid inlets and outlets in three directions so that fluid flow path switching and control can be performed, the two valve bodies are provided in three directions. The extension valve rods of the two installed valve bodies can be selectively installed at the fluid inlet / outlet via the scatch yoke and a plurality of roll pins fixed on a rotating plate driven by an actuator. A three-way butterfly valve, wherein the two valve bodies are connected to one actuator so as to open and close while maintaining a phase difference of about 90 °. 2. The three-way butterfly valve according to claim 1, wherein a seat ring is baked and integrally vulcanized on the inner surface of the main body having fluid inlets and outlets in three directions. 3. A main body having fluid inlets and outlets in three directions is provided with two valve bodies, and a closing valve shaft is inserted into the remaining one valve rod hole to prevent leakage from the portion. The three-way butterfly valve according to claim 1 or 2. 4. The three-way butterfly valve according to claim 1, wherein the actuator is capable of adjusting the degree of closing when the valve is closed, regardless of whether it is manual or automatic. 5. The main body is made of a light alloy or a synthetic resin to reduce the total weight.
Three-way butterfly valve described.