JP2013036483A - Multi-way valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-way valve which is able to switch flow paths of fluid of large capacity and in which drive power of a valve body is low.SOLUTION: The multi-way valve 1 includes a valve body 2 having a valve chamber 2a communicating with an inlet port 12a and a plurality of outlet ports 13a, 14a and valve seats 2c, 2d positioned at boundaries between the valve chamber and each of the plurality of outlet ports, and a valve body 5 rotated in the valve chamber. The valve body includes: a main valve body 51 in a tube shape communicated with an inlet port always at one opening end 51c, and communicated with at least one of the plurality of outlet ports at the other opening end 51d; and a biasing means 52 interposed between the main valve body and a sub valve body 53 and biasing the sub valve body to an inner face 2b side of the valve chamber. The sub valve body comes in contact with a valve seat positioned at a boundary between the valve chamber and the outlet port other than an outlet port communicated with the main valve body to close the outlet port in contact with the valve seat at the boundary. The main valve body has a flow path 51b in an L-shape and having a curve-shaped bent part, and the opening end 51d is communicated with an outlet port disposed on the same circumference.

Description

  The present invention relates to a multi-way valve having a valve chamber in which a valve body is rotatably accommodated and switching a flow path of a fluid such as water.

  Conventionally, as a valve for switching a flow path of large-capacity water or the like, for example, Patent Document 1 includes a ball-shaped valve body having a flow path. A ball valve for switching paths is disclosed.

JP 2005-308165 A

  However, the ball valve described in the above-mentioned patent document has a valve case having a valve chamber in which the valve body is rotatably accommodated, and presses the valve body against a packing attached to the valve case so that the gap between the valve case and the valve body is reduced. Since sealing is performed, there is a problem in that sliding resistance during rotation of the valve body increases, and power for rotating the valve body increases.

  Accordingly, the present invention has been made in view of the above-described problems in the prior art, and can switch the flow path of a large-capacity fluid and reduce the sliding resistance of the valve body to reduce the valve body. It aims at providing the multi-way valve which can suppress drive power low.

  To achieve the above object, the present invention provides a valve body having a valve chamber communicating with an inlet port and a plurality of outlet ports, and a valve seat positioned at a boundary between the valve chamber and each of the plurality of outlet ports. And a valve body that rotates in the valve chamber, wherein the valve body always communicates with the inlet port at one opening end, and the plurality of outlet ports at the other opening end. A cylindrical main valve body that communicates with at least one, and a biasing means that is interposed between the main valve body and the subvalve body and biases the subvalve body toward the inner surface side of the valve chamber. The sub valve body abuts on a valve seat located at the boundary between the outlet port other than the outlet port communicating with the main valve body and the valve chamber, and closes the outlet port contacting the boundary with the valve seat. It is characterized by.

  According to the present invention, only the outlet port other than the outlet port communicating with the main valve body is closed by the sub valve body, and only the valve seat located at the boundary between the outlet port and the valve chamber is closed by the sub valve body. Since the sealing is performed, the sliding resistance of the valve body with respect to the inner surface of the valve chamber during rotation of the valve body can be reduced, and the driving power of the valve body can be kept low.

  In the multi-way valve, the main valve body is L-shaped, includes a flow path having a curved bent portion, and rotates around an axis perpendicular to an end surface of the opening end portion always communicating with the inlet port, The other opening end portion may be configured to communicate with an outlet port disposed on the same circumference. Thereby, even when a large volume of fluid is flowed, the pressure loss in the valve body can be kept low.

  In the multi-way valve, the sub-valve body can be configured such that the surface slidingly contacting the inner surface of the valve chamber is made of a fluororesin, further reducing the sliding resistance of the valve body and enabling smoother operation. It becomes.

  In the multi-way valve, the biasing means may be a coil spring that abuts the main valve body at one end and abuts the sub-valve body at the other end.

  As described above, according to the present invention, it is possible to provide a multi-way valve capable of switching the flow path of a large volume of fluid while keeping the driving power of the valve body low.

It is a figure which shows one Embodiment of the multi-way valve concerning this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is the sectional view on the AA line of (a). It is a figure which shows the external appearance of the valve body of the multi-way valve shown in FIG. 1, (a) is a front view, (b) is a top view, (c) is a side view. FIG. 3 is an exploded sectional view of the valve body of FIG. 2. It is sectional drawing for demonstrating operation | movement of the multi-way valve of FIG.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of a multi-way valve according to the present invention. The multi-way valve 1 includes a valve body 2, a valve body 5 that rotates in a valve chamber 2 a of the valve body 2, and an upper part of the valve body 2. And a motor 3 that rotates the valve body 5 and a seal member 15 that seals between the valve body 2 and the motor 3. The valve body 2 has an inflow pipe 12 at the bottom and two on the side. Outflow pipes 13 and 14 are connected.

  As shown in FIGS. 2 and 3, the valve body 5 is formed in a cylindrical shape, and includes a main valve body 51 having a rotating shaft 51a, and a coil spring 52 as an urging member for the main valve body 51. It is comprised with the subvalve body 53 with which it mounts | wears.

  As shown in FIGS. 1A and 3, the main valve body 51 has an L-shaped channel 51 b, and an open end 51 c that opens downward is always in communication with the inlet port 12 a of the inflow pipe 12. To do. The bent portion of the L-shaped channel 51b is formed in a curved shape, and the pressure loss can be kept low even when a large volume of fluid is flowed. On the other hand, the opening end 51d that opens to the side of the main valve body 51 rotates and slides on the inner surface 2b of the valve chamber 2a by rotating the entire main valve body 51 around the rotation shaft 51a. It communicates with either one of the 14 outlet ports 13a, 14a. The main valve body 51 includes cylindrical protrusions 51e and 51f for accommodating the coil spring 52 and the columnar protrusion 53c of the sub-valve element 53.

  The sub-valve element 53 has a valve portion 53a that opens and closes between the valve chamber 2a and the outlet ports 13a and 14a by contacting and separating the valve seats 2c and 2d located at the boundary between the valve chamber 2a and the outlet ports 13a and 14a. A cylindrical protrusion 53b and a columnar protrusion 53c for mounting the coil spring 52 are provided. Since the valve portion 53a slides on the inner surface 2b of the cylindrical valve chamber 2a, the valve portion 53a is curved along the inner surface 2b and is formed in a curved plate shape slightly larger than the opening cross section of the outlet ports 13a and 14a. The surface is coated with a fluororesin to reduce sliding resistance.

  The coil spring 52 urges the sub valve body 53 toward the inner surface 2b of the valve chamber 2a and the valve seats 2c, 2d by its elastic force.

  As shown in FIG. 1, the valve body 2 includes a valve chamber 2a in which the valve body 5 is accommodated, and an inlet port 12a and outlet ports 13a and 14a communicate with each other, and a boundary between the valve chamber 2a and the outlet ports 13a and 14a. Are formed with valve seats 2c and 2d. The rotation of the rotary shaft 51a of the main valve body 51 causes the valve portion 53a of the sub valve body 53 to slide on the inner surface 2b of the valve chamber 2a. That is, since the columnar protrusion 53c of the sub valve body 53 is inserted into the cylindrical protrusion 51f of the main valve body 51 and is engaged in the rotation direction thereof, the sub valve body 53 is rotated with the rotation of the main valve body 51. Also rotate.

  Next, the operation of the multi-way valve 1 having the above configuration will be described with reference to FIG.

  FIG. 4A shows a state in which the outlet port 13a is closed and the outlet port 14a is opened by the sub-valve element 53, and the inlet port 12a (on the axis perpendicular to the paper surface and from the near side toward the back side of the paper surface). Fluid flows in from the opening end 51d to the outlet port 14a via the flow path 51b as indicated by an arrow. In this state, since there is a gap between the opening end 51d and the inner surface 2b of the valve chamber 2a, the inflowing fluid also flows into the valve chamber 2a, and the inside of the valve chamber 2a is filled with the fluid. Since the valve portion 53a is pressed against the valve seat 2c by the coil spring 52 and completely closes the outlet port 13a, no fluid leaks to the outlet port 13a.

  The rotating shaft 51a is rotated clockwise by the motor 3 from the state shown in FIG. 4A, and as shown in FIG. 4B, the valve portion 53a of the sub-valve element 53 is positioned substantially at the center of the inner surface 2b of the valve chamber 2a. When in the position, both the outlet ports 13a and 14a are opened, and there is a gap between the opening end 51d and the inner surface 2b of the valve chamber 2a, so that the fluid that flows in also flows into the valve chamber 2a. The fluid flowing in from the inlet port 12a flows out to the outlet ports 13a and 14a via the valve chamber 2a.

  When the rotating shaft 51a is rotated clockwise by the motor 3 from the state shown in FIG. 4B, and the state shown in FIG. 4C is reached, the outlet port 14a is closed by the auxiliary valve body 53, and the outlet port 13a is opened. The fluid flowing in from the inlet port 12a flows into the opening end 51c of the main valve body 51, and flows out from the opening end 51d to the outlet port 13a via the flow path 51b as shown by the arrow. Even in this state, since there is a gap between the opening end 51d and the inner surface 2b of the valve chamber 2a, the inflowing fluid also flows into the valve chamber 2a, and the valve chamber 2a is filled with the fluid. The valve portion 53a is pressed against the valve seat 2d by the coil spring 52 and completely closes the outlet port 14a, so that no fluid leaks to the outlet port 14a.

  As described above, according to the multi-way valve 1, when switching the fluid flow path, only the outlet port different from the outlet port 13 a or 14 a communicating with the main valve body 51, that is, only the outlet port to be closed is sub- The valve body 53 is closed by the valve body 53, and only the valve seat 2c or 2d positioned at the boundary between the outlet port 13a or 14a and the valve chamber 2a of the valve body 2 is sealed by the valve portion 53a of the sub-valve body 53. The sliding resistance of the valve body 5 with respect to the inner surface 2b of the valve chamber 2a during rotation of the valve chamber 2a can be reduced, and the driving power of the valve body 5 can be kept low.

  In the above embodiment, the coil spring 52 is used to bias the auxiliary valve body 53 toward the inner surface 2b and the valve seats 2c, 2d of the valve chamber 2a. However, other biasing members may be used. .

  In the above embodiment, the three-way valve is exemplified, but the present invention can be similarly applied to a two-way valve or a four-way valve provided with three or more outlet ports. However, when switching the fluid flow path, only the outlet port other than the outlet port communicating with the main valve body is closed by the sub-valve body, thereby providing a multi-way valve with low driving power of the valve body. .

1 Multi-way valve 2 Valve body 2a Valve chamber 2b (valve chamber) inner surface 2c, 2d Valve seat 3 Motor 5 Valve body 51 Main valve body 51a Rotating shaft 51b Flow path 51c, 51d Open end 51e, 51f Cylindrical protrusion 52 Coil spring 53 Sub valve body 53a Valve portion 53b Cylindrical protrusion 53c Columnar protrusion 12 Inflow pipe 12a Inlet port 13, 14 Outlet pipe 13a, 14a Outlet port 15 Sealing material

Claims (4)

A valve body having a valve chamber communicating with the inlet port and the plurality of outlet ports, a valve seat positioned at a boundary between the valve chamber and each of the plurality of outlet ports, and a valve body rotating in the valve chamber; A multi-way valve
The valve body is
A cylindrical main valve body that always communicates with the inlet port at one open end, and communicates with at least one of the plurality of outlet ports at the other open end;
A biasing means interposed between the main valve body and the sub-valve body, and biasing the sub-valve body toward the inner surface side of the valve chamber;
The sub valve body abuts on a valve seat located at the boundary between the outlet port other than the outlet port communicating with the main valve body and the valve chamber, and closes the outlet port contacting the valve seat. Features multi-way valve.   The main valve body is L-shaped and includes a flow path having a curved bent portion, and rotates around an axis perpendicular to an end surface of the open end always communicating with the inlet port, and the other open end The multi-way valve according to claim 1, wherein the portions communicate with outlet ports arranged on the same circumference.   3. The multi-way valve according to claim 1, wherein a surface of the sub valve body that is in sliding contact with an inner surface of the valve chamber is made of a fluororesin. 4.   The multi-way valve according to claim 1, 2 or 3, wherein the biasing means is a coil spring that abuts the main valve body at one end and abuts the subvalve body at the other end.

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