JP7190790B2 - three-way valve - Google Patents

Description

The technology disclosed in the present application relates to a three-way valve having one inflow port and two outflow ports.

Conventionally, a three-way valve having one inflow port and two outflow ports is disclosed in Patent Document 1 and the like. In Patent Document 1, a valve body provided with an inlet on one side of a cylindrical outer casing and two outlets facing the inlet at an angle of about 90° is provided with a drive shaft positioned on the periphery opposite to the inlet. There is disclosed an electrically operated three-way valve that houses a valve body that is attached to the two outlets and pivots between the two outlets to close one of the outlets.

Japanese Utility Model Publication No. 54-34253

In the electric three-way valve disclosed in Patent Document 1, two outlets of the valve body are each provided with a valve seat on which a valve body is seated. Since the valve seats provided for the two outlets must be formed by machining, there is a problem that it is difficult to integrally mold the valve body to reduce the manufacturing cost.

In addition, since the valve body is brought into contact with the valve seat each time the flow path is switched, it is necessary to periodically replace the valve body due to wear of the valve body. There is also the problem that the valve body itself must be replaced, which complicates the replacement work and makes maintenance difficult.

The technology disclosed in the present application has been proposed in view of the above problems, and provides a three-way valve that eliminates the need to process the valve seat so that the valve body can be integrally molded and that is easy to maintain. for the purpose.

To achieve the above object, a three-way valve according to claim 1 is a three-way valve having one inflow port and two outflow ports, comprising a body having a passage for passing fluid and a body rotating around its own axis. A shaft that is movably supported by the body and extends in the radial direction of the passage, a valve body that is mounted on the shaft and arranged in the passage and rotates together with the shaft, and a drive that rotates the shaft when energized. and the valve body includes a first annuloplasty part and a second annuloplasty part extending in symmetrical directions with respect to a center line passing through the pivot shaft of the valve body, and the first annuloplasty part The outer peripheral portion is formed along the inner peripheral surface of one of the two outflow ports, is fitted with the O-ring, and is provided with a concave groove that allows the O-ring to be attached and detached. The outer peripheral portion of the portion is formed along the inner peripheral surface of the other of the two outflow ports, is fitted with the O-ring, and is provided with a concave groove that allows the O-ring to be attached and detached. When the valve body is rotated with the O-ring attached to each of the annuloplasty portion and the second annuloplasty portion so that the inflow port communicates with one of the ports, the O-ring of the second annuloplasty portion is connected to the other port. When the inner peripheral surface of one port is sealed to close the other outflow port and the inflow port communicates with the other port, the O-ring of the first annuloplasty part seals the inner peripheral surface of one port. It is characterized in that one of the ports is closed by pressing and switching between the two outflow ports is made possible.

A three-way valve according to claim 2 is the three-way valve according to claim 1, wherein at least one of the two outflow ports is arranged substantially parallel to one inflow port. .

In the three-way valve according to claim 1, of the two outflow ports, an O-ring is attached along the inner peripheral surface of one outflow port and an O-ring is attached along the inner peripheral surface of the other outflow port. When the inflow port and one outflow port are communicated with each other by using a valve body having a second annuloplasty portion with a ring attached thereto, the O-ring is seated on the inner peripheral surface of the other outflow port, When one outflow port is closed and the inflow port and the other outflow port are communicated with each other, an O-ring is seated on the inner peripheral surface of one outflow port to close one outflow port. In other words, since the inner peripheral surface of each outflow port functions as a valve seat, there is no need to form a valve seat as disclosed in Patent Document 1. Therefore, the body of the three-way valve can be integrally molded, and the manufacturing cost can be reduced. In addition, when the valve body wears, maintenance can be performed simply by replacing the O-ring, so maintenance can be easily performed, and since a general-purpose O-ring can be used, the cost of parts can be reduced.

In the three-way valve according to claim 2, by arranging at least one of the two outflow ports and the inflow port substantially in parallel, the three-way valve can be made compact. As a result, the apparatus can be installed in a narrow space, and the overall space of the apparatus can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the three-way valve which is one Embodiment concerning this invention, (A) Front view, (B) Side view, and (C) It is the top view which looked at the side view from the upper part. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1(A); It is a BB sectional view of (B) of FIG. 1, and is a figure explaining (A) the state where one outflow port was closed, and (B) the state where the other outflow port was closed. It is the (A) front view, (B) side view, (C) the left view which looked at the side view from the left, and (D) the right view which looked at the side view from the right of the shaft to which a valve body is assembled|attached. (A) top view, (B) front view, (C) bottom view, (D) right side view of the disc, which is the valve body, and (E) CC cross-sectional view of (B) be. It is a figure explaining attachment|attachment with a disc and a shaft, and is the figure which showed (A) the assembly method, and (B) the assembly|attachment state, respectively. FIG. 4 is a cross-sectional view of a three-way valve that is another embodiment of the present invention;

First, a three-way valve 1 which is one embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is an external view of a three-way valve 1 that is an embodiment according to the present invention. (A) of FIG. 1 is a front view, (B) is a side view of the front view of (A) viewed from the right, and (C) is a top view of the side view of (B) viewed from above.

As shown in FIG. 1, the three-way valve 1 comprises a body 10 and a drive section 30 comprising a stepping motor, gears, and the like. The body 10 is provided with an inflow port 11 and two outflow ports 12 and 13 . Although the three-way valve 1 of the present embodiment employs a stepping motor as described above, other motors can also be employed.

FIG. 2 is a sectional view taken along the line AA of FIG. 1(A). A disk 14 mounted on a shaft 17 is arranged between the outflow port 12 and the outflow port 13 . O-rings 15 and 16 (shown in FIG. 3) are attached to the disk 14, and the disk 14 to which the O-rings 15 and 16 are attached functions as a valve element for switching the flow path. The shaft 17 is supported by the body 10 so as to be rotatable about its own axis, and is arranged to extend in the radial direction of the outflow passage 20 connecting between the outflow port 12 and the outflow port 13 . An O-ring 18 maintains a sealed state between the shaft 17 and the body 10 . One end 17A of the shaft 17 is connected to the driving portion 30, and the driving portion 30 rotates the shaft 17 together with the disk 14. As shown in FIG.

FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1(B). FIG. 3A shows a state in which the outflow port 12 is closed, and FIG. 3B shows a state in which the outflow port 13 is closed.

As shown in FIG. 3 , the inflow passage 21 of the inflow port 11 communicates with the outflow passage 20 via the valve chamber 22 . A disk 14 is supported by a shaft 17 and arranged rotatably in the valve chamber 22 . O-rings 15 and 16 are attached to the disk 14 in a symmetrical direction with respect to the center line OA passing through the rotation axis on which the disk 14 rotates.

Here, the disk 14 and the shaft 17, which are features of the present invention, will be described in detail with reference to FIGS. 4 to 6. FIG.

4 shows the shaft 17, (A) is a front view, (B) is a side view, (C) is a left side view of the side view from the left, and (D) is a side view from the right. It is the seen right view. As shown in FIG. 4A, the shaft 17 includes, from the left in the drawing, a shaft gear portion 17a (17A) that engages with the gear in the driving portion 30, a cylindrical shaft support portion 17b, and an O-ring 18. It is composed of a shaft concave portion 17c for fitting, a pentagonal prism-shaped shaft shaft portion 17d, and a cylindrical shaft end portion 17e having a truncated conical end portion.

FIG. 5 shows the disk 14, (A) is a top view, (B) is a front view, (C) is a bottom view, (D) is a right side view of the front view from the right, ( E) is a CC sectional view of (B). As shown in FIG. 5A, the disc 14 includes a disc main body portion 14a and a pentagonal prism-shaped through hole 14b centered on the rotation axis OC and fitted with the shaft shaft portion 17d of the shaft 17. , a first disk recess 14c for fitting the O-ring 15 and a second disk recess 14d for fitting the O-ring 16 extending in symmetrical directions with respect to the center line OA passing through the center of the rotation shaft OC. consists of Here, as shown in FIGS. 5A and 5B, the first disk concave portion 14c closes the outflow port 12 side of the valve chamber 22 when closing the outflow port 12 in FIG. 3A. The second disc recess 14d is formed so that the O-ring 15 is seated along the inner peripheral surface of the valve chamber 22 on the outflow port 13 side when the outflow port 13 is closed in FIG. It is shaped such that an O-ring 16 is seated along the inner peripheral surface.

As shown in FIG. 6A, the shaft 17 and disc 14 are assembled into the body 10 by inserting the shaft shaft portion 17d of the shaft 17 into the through hole 14b of the disc 14 (see FIG. 6B). be

Next, operation of the three-way valve 1 will be described with reference to FIG. As described above, FIG. 3A shows the state in which the outflow port 12 is closed, and FIG. 3B shows the state in which the outflow port 13 is closed. To close the outflow port 12, the disc 14 is rotated toward the outflow port 12 as shown in FIG. 3A. Then, the O-ring 15 fitted in the first disk concave portion 14c of the disk 14 is seated along the inner peripheral surface of the valve chamber 22 on the side of the outflow port 12 to close the outflow port 12, thereby separating the inflow port 11 and the outflow port. 13 and the fluid flows along the arrows (1) and (2) shown in FIG. 3A. Conversely, when closing the outflow port 13, the disk 14 is rotated in the direction of the outflow port 13 as indicated by the arrow (4) in FIG. 3A. Then, as shown in FIG. 3B, the O-ring 16 fitted in the second disk concave portion 14d of the disk 14 is seated along the inner peripheral surface of the valve chamber 22 on the outflow port 13 side, and the outflow port is closed. 13 is closed, the inflow port 11 and the outflow port 13 are communicated, and the fluid flows along the arrows (1) and (3) shown in FIG. 3B.

Thus, in the three-way valve 1 according to the present invention, when switching between the outflow port 12 and the outflow port 13, the O-ring 15 fitted in the disc 14 is placed on the inner peripheral surface of the valve chamber 22 on the outflow port 12 side. Also, since the O-ring 16 is seated on the inner peripheral surface of the outflow port 13 side of the valve chamber 22 and sealed, there is no need to provide the body 10 with a valve seat as disclosed in Patent Document 1. Therefore, the body 10 can be manufactured by integral molding, and the manufacturing cost can be reduced. In addition, even if the O-rings 15 and 16 wear due to repeated closing/opening operations of the outflow ports 12 and 13, only the O-rings 15 and 16 need to be replaced, so a three-way valve with excellent maintainability can be supplied. . Furthermore, since general-purpose O-rings can be used for the O-rings 15 and 16, the parts cost can be reduced.

In addition, in the three-way valve 1 according to the present invention, the outflow port 12 and the inflow port 11 of the two outflow ports are arranged substantially parallel to each other. Therefore, it can be installed in a narrow space, and the space of the entire device using the three-way valve 1 can be saved.

Here, the three-way valve 1 is an example of a three-way valve, the body 10 is an example of a body, the inflow port 11 is an example of one inflow port, and the outflow port 12 and outflow port 13 are examples of two outflow ports. , the disc 14 is an example of a valve body, the shaft 17 is an example of a shaft, the drive portion 30 is an example of a drive portion, the first disc concave portion 14c is an example of a first valve forming portion, and the first The two disc recess 14d is an example of a second annuloplasty portion, and the O-rings 15 and 16 are examples of O-rings.

Although the embodiments of the present invention have been described in detail above, these are only examples, and the present invention is not to be construed in any limited way by the specific descriptions in such embodiments. It can be implemented in embodiments with various changes, modifications, improvements, etc. based on knowledge, and as long as such embodiments do not depart from the spirit of the present invention, all are within the scope of the present invention. should be understood to be included in the

For example, in the three-way valve 1 described above, the outflow port 12 and the inflow port 11 are arranged substantially in parallel. may be arranged together substantially parallel to the inflow port 110 . It is more compact than the three-way valve 1, and space can be saved further.

Reference Signs List 1 Three-way valve 10 Body 11 Inflow ports 12, 13 Outflow port 14 Disc 14c First disc recess 14d Second disc recess 15, 16, 18 O-ring 17・Shaft 28
30... Drive unit

Claims (2)

A three-way valve having one inflow port and two outflow ports,
a body having a passageway for passing a fluid;
a shaft supported by the body so as to be rotatable about its own axis and extending in a radial direction of the passage;
a valve body that is arranged in the passage while being assembled to the shaft and that rotates together with the shaft;
a drive unit that rotationally drives the shaft by energization,
The valve body includes a first annuloplasty portion and a second annuloplasty portion extending in symmetrical directions with respect to a center line passing through the pivot shaft of the valve body,
The outer peripheral portion of the first annuloplasty portion is formed along the inner peripheral surface of one of the two outflow ports, and is fitted with an O-ring to make the O-ring detachable. make grooves,
The outer peripheral portion of the second annuloplasty portion is formed along the inner peripheral surface of the other of the two outflow ports, and is fitted with an O-ring to make the O-ring detachable. make grooves,
Rotating the valve body with O-rings attached to the first valve plasty portion and the second valve plasty portion, respectively,
when the inflow port and the one port communicate with each other, the O-ring of the second annuloplasty portion seals the inner peripheral surface of the other port to close the other outflow port;
When the inflow port and the other port communicate with each other, the O-ring of the first annuloplasty portion seals the inner peripheral surface of the one port to close the one port,
A three-way valve characterized in that the two outflow ports are switchable. The three-way valve according to claim 1, wherein at least one of the two outflow ports is arranged substantially parallel to the one inflow port.

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