JP2017172651A - Flow passage selector valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow passage selector valve capable of securely preventing fluid leakage (valve leakage) between a valve element and a valve body without increasing torque required for switching of a flow passage, to realize various on/off modes.SOLUTION: Below a valve element 20 in a valve chamber 11, provided is an on-off valve 30 vertically moving to an inflow port p10 according to rotation of the valve element 20 to open/close the inflow port p10. The on-off valve 30 is configured to vertically move to the inflow port p10 in a state of inhibiting rotation.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a flow path switching valve, for example, a rotary flow path switching valve that switches a flow path by rotating and sliding a valve element in a valve chamber.

  A conventional example of this type is shown in FIG. The flow path switching valve 1 'of the illustrated conventional example is used as a rotary type switching valve (rotary valve) that switches the flow path of a fluid flowing in, for example, an engine room of an automobile, and a motor 50 as a rotation drive unit. A valve body 10 having a valve chamber 11 and an inlet p10 and outlets p1 and p2 that open to the valve chamber 11, and a seal member 30 disposed in the valve chamber 11 of the valve body 10, A cylindrical body 35 having a plurality of openings 31 to 34 formed in the circumferential direction, and an inner side projecting inward and outward from the inner and outer peripheral surfaces of the cylindrical body 35 along the periphery of the openings 31 to 34 A cylindrical valve body 2 having a seal member 30 having ribs 31 a to 34 a and outer ribs 31 b to 34 b and a valve shaft 26 connected to the motor 50 and housed in a region surrounded by the seal member 30. 0, and by rotating the valve body 20 in the valve chamber 11 via the valve shaft 26 by the motor 50, the valve body 20 is formed of the inner ribs 31a to 34a of the seal member 30. The outlets p1 and p2 of the valve body 10 are opened and closed or switched by rotating and sliding on the inner peripheral side (see, for example, Patent Document 1).

  Further, in the above-described conventional channel switching valve 1 ′, in order to prevent fluid leakage (valve leakage) between the valve chamber 11 and the outlets p1 and p2, the valve body 20 and the valve body 10 In the meantime, the seal member 30 is interposed in a constantly compressed state.

  Further, as this type of flow path switching valve, the rotational torque of the valve body (that is, the torque required for switching the flow path), specifically, the frictional resistance (sliding resistance) between the valve body and the valve body. In order to reduce this, there is also known one that eliminates a seal member disposed between the valve body and the valve body (see, for example, Patent Document 2).

Japanese Patent Laying-Open No. 2015-034560 JP2013-241982A

  By the way, in the conventional flow path switching valve described above, in particular, the flow path switching valve having no seal member, the amount of fluid leakage is reduced when the valve body closes the outlet provided in the side portion of the valve chamber. In order to precisely adjust the flow rate, it is required to make the clearance (gap) between the valve body (outer circumference) and the valve body (inner circumference) as small as possible. However, it is difficult to completely prevent fluid leakage (valve leakage) between the valve body and the valve body due to the pressure of the fluid flowing through the valve chamber (fluid pressure). It is extremely difficult to realize a mode in which all the outlets are closed.

  Also, if the clearance (gap) between the valve body and the valve body is too small, the frictional resistance (sliding resistance) between the valve body and the valve body increases, and the valve body may not rotate smoothly. There is also.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to prevent fluid leakage (valve leakage) between the valve body and the valve body without increasing the torque required for switching the flow path. It is an object of the present invention to provide a flow path switching valve capable of preventing various problems and realizing various open / close modes.

  In order to solve the above-described problems, a flow path switching valve according to the present invention includes a valve chamber formed of a cylindrical space, an inflow opening opened at a bottom portion of the valve chamber, and an opening at a side portion of the valve chamber. A valve main body having at least one outlet port, a cylindrical valve body rotatably disposed in the valve chamber and provided with at least one communication port on a side, and the valve body. A flow drive switching unit configured to open, close, or switch the outlet of the valve body by rotating the valve body in the valve chamber by the rotation drive unit. It is a valve, Comprising: The opening-closing valve which moves up and down with respect to the said inflow port according to rotation of the said valve body and opens and closes this inflow port is provided below the said valve body.

  In a preferred aspect, the on-off valve moves up and down in a state where rotation is prevented with respect to the inlet.

  In a further preferred aspect, a support column is erected on the bottom of the valve body, and a fitting portion is provided in which the support column is slidably fitted to the on-off valve.

  In a further preferred aspect, the fitting portion is constituted by a recess provided on the outer periphery of the on-off valve.

  In another preferred embodiment, a downward valve body-side convex portion is provided at the bottom of the valve body, and an upward on-off valve-side convex portion is provided on the on-off valve, and the valve body-side convex portion is provided according to the rotation of the valve body. And the on-off valve side convex portion are brought into contact with and separated from each other so that the on-off valve moves up and down with respect to the inflow port.

  According to the present invention, an on-off valve is provided below the valve body to open and close the inlet by moving up and down with respect to the inlet according to the rotation of the valve body. Without increasing, fluid leakage (valve leakage) between the valve body and the valve body is surely prevented, and various open / close modes (especially, all outlets provided on the side of the valve chamber are closed) ) Can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the main structures of one Embodiment of the flow-path switching valve based on this invention, (A) is a perspective view, (B) is a partial notch (a central angle 90 degree part is notched by planar view) perspective view. It is a longitudinal cross-sectional view of the flow-path switching valve shown by FIG. 1, and is a figure which shows the state by which the inflow port was opened. It is a longitudinal cross-sectional view of the flow-path switching valve shown by FIG. 1, and is a figure which shows the state by which the inflow port was closed. The perspective view which looked at the lower port member of the flow-path switching valve concerning this invention from diagonally upward. It is a figure which shows the valve body of the flow-path switching valve concerning this invention, (A) was seen from diagonally upward, (B) is the perspective view seen from diagonally downward. It is a figure which shows the on-off valve of the flow-path switching valve based on this invention, (A) is the perspective view seen from diagonally upward, (B) is a side view, (C) is the perspective view seen from diagonally downward. It is a figure which shows the state which assembled | attached the on-off valve to the lower port member of the flow-path switching valve based on this invention, (A) is the perspective view seen from diagonally upward, (B) is a side view. It is a figure which shows the conventional flow-path switching valve, (A) is a longitudinal cross-sectional view, (B) is sectional drawing which follows the XX arrow line of (A).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In each drawing, gaps formed between members, separation distances between members, etc. may be exaggerated for easy understanding of the invention and for convenience of drawing. is there. Further, in this specification, descriptions representing positions and directions such as up and down, left and right, and front and rear are based on the direction arrow display in FIG. 1A and do not indicate the position and direction in the actual use state. .

  Moreover, in each figure, the motor as a rotational drive part for rotationally driving a valve body is abbreviate | omitted.

  FIG. 1 is a diagram showing a main configuration of an embodiment of a flow path switching valve according to the present invention, FIG. 1 (A) is a perspective view, and FIG. 1 (B) is a partial cutout (center angle 90 ° in plan view). FIG. FIGS. 2 and 3 are longitudinal sectional views of the flow path switching valve shown in FIG. 1, respectively, showing a state where the inlet is opened and a state where the inlet is closed.

  The flow path switching valve 1 of the illustrated embodiment is used as, for example, a rotary three-way switching valve that switches the flow path of a fluid flowing in an engine room of an automobile in multiple directions. A valve body 10 made of synthetic resin, a cylindrical valve body 20 with a ceiling portion 20 </ b> A that is rotatably arranged in the valve chamber 11, and the valve body 10 in order to rotate the valve body 20 around the rotation axis O. And a substantially disk-shaped on-off valve 30 below the valve body 20 in the valve chamber 11 and is not rotatable and can be moved up and down. Is distributed.

  The valve body 10 is composed of a cylindrical base member 12 with a ceiling portion 12A and a lower port member 15, and the base member 12 is formed with a valve chamber 11 having a stepped cylindrical space inside. In addition, two outlets p1 and p2 that open to the valve chamber 11 (the upper small-diameter portion thereof) are provided at a side portion with a predetermined angular interval (an angular interval of 90 degrees in the illustrated example). Outlet ports # 1 and # 2 made of pipe joints are integrally connected to the outer periphery of the base member 12 so as to communicate with the outlets p1 and p2. Further, a fitting insertion hole 13 is formed in the ceiling portion 12A of the base member 12 through which the valve shaft 26 (the body portion 26B) connected to the valve body 20 (the ceiling portion 20A) is inserted. At the lower end opening of the base member 12, a lower port member 15 having an inflow port # 10 formed of a pipe joint provided with a vertical inflow port p10 that opens to the valve chamber 11 (lower large diameter portion), The inner fitting is fixed by ultrasonic welding, press fitting, caulking, or the like.

  Further, in this embodiment, as can be understood by referring to FIGS. 4 and 7 together with FIGS. 1 to 3 around the inlet p10 on the upper surface (surface on the valve chamber 11 side) of the lower port member 15, A plurality of columnar columns 16 are erected at predetermined angular intervals (in the illustrated example, four are spaced at equal angular intervals of 90 degrees).

  The valve body 20 is made of, for example, a synthetic resin or a metal. As can be understood by referring to FIG. 5 together with FIGS. 1 to 3, two oval communication ports 21 and 22 are provided at predetermined angular intervals on the side portion. A valve shaft 26 that transmits the rotational force of the motor to the valve body 20 is integrally connected to the ceiling portion 20A that is provided with an angular interval of 90 degrees in the illustrated example and closes the upper opening. Has been.

  The valve shaft 26 is rotatably inserted in the insertion hole 13 and has a body portion 26B having a diameter smaller than that of the valve body 20, and protrudes from the body portion 26B, and is connected to the output shaft of the motor. The upper connecting portion 26A having an oblong shape in plan view is provided with an O-ring 27 as a sealing member in two stages in the body portion 26B (annular groove formed on the outer periphery thereof).

  Further, in the present embodiment, the convex portion 34 provided on the on-off valve 30 described later on the bottom of the cylindrical valve body 20 (specifically, the bottom surface of the valve body 20 facing the lower port member 15). A convex portion 24 having a generally angled shape in a side view and having a smooth inclined surface in the circumferential direction is protruded. In this example, two convex portions 24 are provided on the opposite side to the center line (rotation axis) O (in other words, with an angular interval of 180 degrees). In this example, the outer diameter of the valve body 20 is the same as the inner diameter of the upper small diameter portion of the valve chamber 11, and the valve body 20 rotates and slides on the upper small diameter portion of the valve chamber 11. It is supposed to be.

  The on-off valve 30 is made of, for example, a synthetic resin, and as can be understood by referring to FIGS. 6 and 7 together with FIGS. 1 to 3, the thin disc-shaped valve body 31 having a slightly larger diameter than the inlet p <b> 10. And an inverted frustoconical shape that is larger in diameter than the valve body 31 and is supported by the column 16 of the valve body 10 (the lower port member 15 thereof) so as to be movable up and down (in a state where rotation is prevented). It is comprised with the base | substrate part 32. FIG. The on-off valve 30 is integrally formed on the lower surface side of the base portion 32 (for example, two-color molding (double-colored (double-colored)) such that the lower surface of the valve body portion 31 (the surface that contacts the inlet p10) is exposed. Injection molding)). The valve body 31 is preferably manufactured using a rubber material having high elasticity such as H-NBR, EPDM, FKM, but is not limited to this material. Further, the valve body portion 31 and the base portion 32 may be coupled by a fixing method such as screwing or caulking.

  The base portion 32 has substantially the same diameter as the outer diameter of the valve body 20, and a semi-circular shape in plan view in which the support 16 of the valve body 10 (the lower port member 15) is slidably fitted on the outer periphery thereof. A fitting portion 33 made of a concave portion is provided, and the outer peripheral portion of the upper surface of the base body portion 32 is brought into contact with the convex portion 24 provided on the bottom portion of the valve body 20, and is smoothly inclined in the circumferential direction. A convex portion 34 having a surface and having a substantially mountain shape in side view is projected. Similar to the support columns 16, a plurality of the fitting portions 33 are provided at predetermined angular intervals (in the illustrated example, four at an equal angular interval of 90 degrees). Similarly to the convex portion 24, the convex portion 34 is provided on the opposite side to the center line (rotation axis) O (in other words, with an angular interval of 180 degrees), and in plan view. It is arranged on the same circumference as the convex portion 24. Each support column 16 of the valve main body 10 (the lower port member 15 thereof) is fitted into each fitting portion 33 of the on-off valve 30 (base portion 32 thereof), so that the on-off valve 30 is located below the valve body 20 (that is, In the lower large diameter portion of the valve chamber 11, the valve body 10 (the lower port member 15) can be moved up and down, whereby a valve body provided on the lower surface side of the on-off valve 30. The part 31 comes in contact with and separates from the inlet p10 (the upper end part thereof).

  Further, in the illustrated example, between the ceiling portion 20A (the upper surface) of the valve body 20 and the ceiling portion 12A (the lower surface) of the base member 12 of the valve body 10 (in other words, on the upper surface of the ceiling portion 20A of the valve body 20). A sliding circle made of Teflon (registered trademark) or the like in order to reduce the sliding resistance of the valve body 20 with respect to the valve body 10 when the flow path is changed (around the valve body 20) around the valve shaft 26). An annular sheet member 23 is interposed.

  In the flow path switching valve 1 having such a configuration, when the valve body 20 is rotated by driving the motor, the valve body 20 rotates and slides on the inner peripheral side of the valve chamber 11 (the upper small diameter portion thereof). The outlets p1 and p2 are opened / closed or switched. Specifically, each of the outlets p1 and p2 formed in the valve body 10 communicates with the valve chamber 11 (via the respective communication ports 21 and 22 of the valve body 20), and each outlet p1. , P2 is closed (by the valve body 20), and the outlet p1 communicates with the valve chamber 11 (via the communication port 22 of the valve body 20), and the outlet p2 (by the valve body 20). 4 in a closed-open mode in which the outlet p1 is closed (by the valve body 20) and the outlet p2 is in communication with the valve chamber 11 (via the communication port 21 of the valve body 20). Two open / close modes are selectively taken.

  Here, in the flow path switching valve 1 configured as described above, in the three modes of the open-open mode, the open-close mode, and the close-open mode, the convex portion 24 provided at the bottom of the valve body 20 and the open / close mode are opened and closed. The projection 34 provided on the valve 30 is not in contact (that is, spaced apart in the circumferential direction), and the on-off valve is controlled by the pressure (fluid pressure) of the fluid flowing through the inlet p10 (inflow port # 10). 30 is lifted with respect to the valve body 10 (inlet p10 of the lower port member 15) (guided by the support column 16). Specifically, the lower end of the convex portion 24 of the valve body 20 abuts on the upper surface of the on-off valve 30 (base portion 32 thereof), and the upper end of the convex portion 34 of the on-off valve 30 abuts on the bottom surface of the valve body 20. Until it is raised. Therefore, the inlet p10 formed in the valve body 10 is a space outside the opening / closing valve 30 in the valve chamber 11 (specifically, a portion wider than the upper small diameter portion in the lower large diameter portion of the valve chamber 11), opening / closing The valve 30 communicates with the valve chamber 11 via the gap between the valve body 20 and the valve body 20 (specifically, the gap between the convex portion 34 of the on-off valve 30 and the convex portion 24 of the valve body 20) and the lower end opening of the valve body 20. (State shown in FIG. 2).

  On the other hand, when the valve body 20 is rotated from the above three opening / closing modes and the closed / closed mode is set, the opening / closing of the convex portion 24 provided at the bottom of the valve body 20 is performed according to the rotation (rotation angle). A convex portion 34 provided on the valve 30 is brought into contact with the above-described fluid pressure, and the on-off valve 30 (while being guided by the support column 16) against the fluid pressure described above (the inlet p10 of the lower port member 15 thereof). ). Therefore, the valve body portion 31 exposed on the lower surface side of the on-off valve 30 is pressed against the inlet p10 of the valve body 10, and the inlet p10 is closed (the state shown in FIG. 3).

  Thus, in the flow path switching valve 1 of the present embodiment, the flow is moved up and down with respect to the inlet p10 in accordance with the rotation (rotation angle) of the valve body 20 below the valve body 20 in the valve chamber 11. Since the on-off valve 30 for opening and closing the inlet p10 is provided, fluid leakage (valve leakage) between the valve body 20 and the valve body 10 can be reliably prevented without increasing the torque required for switching the flow path. Various open / close modes (in particular, a mode in which all the outlets p1 and p2 provided on the side portion of the valve chamber 11 are closed) can be realized.

  Further, since the on-off valve 30 moves up and down while being prevented from rotating with respect to the inlet p10, the inlet p10 can be precisely opened and closed, and the valve body 20 and the valve body 10 The fluid leakage (valve leakage) can be prevented more reliably.

  In addition, it cannot be overemphasized that the number and arrangement | positioning structure of the communicating port formed in the valve body 20 and the outflow port formed in the valve main body 10 can be changed suitably according to the application location of the said flow-path switching valve 1, etc. No.

DESCRIPTION OF SYMBOLS 1 Flow path switching valve 10 Valve main body 11 Valve chamber 12 Base member 13 Insertion hole 15 Lower port member 16 Post 20 Valve body 21, 22 Communication port 23 Sheet member 24 Valve body side convex part 26 Valve shaft 30 On-off valve 31 Valve body part 32 Base part 33 Fitting part 34 On-off valve side convex part p1, p2 Outlet p10 Inlet

Claims (5)

A valve body comprising a valve chamber formed of a cylindrical cavity, an inflow opening opened at the bottom of the valve chamber, and at least one outflow opening opened at a side of the valve chamber;
A cylindrical valve body that is rotatably disposed in the valve chamber and has at least one communication port on a side portion thereof;
A rotation drive unit for rotating the valve body,
A flow path switching valve adapted to open and close or switch the outlet of the valve body by rotating the valve body in the valve chamber by the rotation drive unit;
A flow path switching valve, wherein an opening / closing valve is provided below the valve body to move up and down relative to the inlet according to the rotation of the valve body to open and close the inlet.   2. The flow path switching valve according to claim 1, wherein the on-off valve is configured to move up and down while being prevented from rotating with respect to the inflow port.   The flow path according to claim 2, wherein a support column is erected on the bottom of the valve body, and a fitting portion is provided on the open / close valve so that the support column is slidably fitted. Switching valve.   The flow path switching valve according to claim 3, wherein the fitting portion is configured by a recess provided on an outer periphery of the on-off valve.   A downward valve body side convex portion is provided at the bottom of the valve body, and an upward on-off valve side convex portion is provided on the on-off valve, and the valve body side convex portion and the on-off valve side according to the rotation of the valve body 5. The flow path switching valve according to claim 1, wherein the on-off valve moves up and down relative to the inflow port by contacting and separating from a convex portion.

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