JP2019157931A - Fluid control valve - Google Patents

Abstract

To prevent accumulation of foreign matters in a body of a fluid control valve, to improve workability of a valve element and simultaneously to prevent degradation of sealability.SOLUTION: A valve portion 58 of a valve element 14 is rotatably housed in a housing chamber 24 of a body 12, and a foreign matter recovery chamber 44 is formed in the housing chamber 24 in a manner of being opened at an inner wall surface at an upstream side, and offset to a lower part in a gravity direction, with respect to a bottom surface 46. Further as a fluid flowing into the housing chamber 24 flows to the upstream side along the bottom surface 46 of the housing chamber 24, the foreign matters accumulated on the bottom surface 46 are pushed out and guided to the foreign matter recovery chamber 44 to be stored.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fluid control valve that is provided on a flow path through which fluid flows and controls the flow rate of the fluid.

  Conventionally, for example, a fluid control valve that is used in a cooling water circuit for cooling an internal combustion engine for a vehicle and controls the flow rate of a fluid such as cooling water is known. In this fluid control valve, for example, as disclosed in Patent Document 1, a substantially cylindrical valve body is rotatably provided inside a valve storage chamber in a valve box, and the valve body has a radial direction. A flow rate control hole is formed therethrough. In addition, an inlet side pipe and an outlet side pipe are respectively connected to both ends of the valve box, and a seal packing that slides on the valve body is provided inside the valve storage chamber so as to be adjacent to the outlet side pipe. ing.

  The valve body rotates while being in sliding contact with the packing, and its flow rate control hole communicates with the inlet side pipe and the outlet side pipe so that the fluid from the inlet side pipe communicates with the outlet side through the flow rate control hole. It flows into the pipe.

JP 2003-232454 A

  However, in the above-described fluid control valve of Patent Document 1, when foreign matter contained in the fluid enters the valve storage chamber, it accumulates at the bottom of the valve storage chamber and accumulates in the upstream portion where the flow of fluid is weak. As a result, there arises a problem that the valve body and the body or between the valve body and the seal member are engaged and cause malfunction, or the sealing performance is deteriorated.

  The present invention has been made in consideration of the above-mentioned problems, and is a fluid control valve capable of preventing foreign matter from accumulating in the body, improving the operability of the valve body, and at the same time preventing deterioration of the sealing performance. The purpose is to provide.

In order to achieve the above object, the present invention includes a body having an inlet for introducing fluid and an outlet for discharging fluid, and a valve body rotatably provided in a valve chamber of the body. In the fluid control valve, the valve body has a valve hole penetrating in a direction orthogonal to the rotation center, and the communication state between the inlet port and the outlet port by the valve hole is switched under the rotating action of the valve body.
The body has a foreign substance collection chamber that opens to the upstream side, which is the inlet side in the valve chamber, and can store foreign substances contained in the fluid.
The bottom surface of the foreign material recovery chamber is formed to be lower than the bottom surface of the valve chamber in the direction of gravity.

  According to the present invention, the body constituting the fluid control valve is provided with a valve chamber in which the valve body is rotatably accommodated, and the upstream side of the valve chamber is capable of storing foreign matter contained in the fluid. The recovery chamber is formed so as to open, and the bottom surface of the foreign material recovery chamber is formed to be lower than the bottom surface of the valve chamber in the direction of gravity.

  Therefore, in the valve open state in which the inlet port and the outlet port communicate with each other through the valve hole under the rotational action of the valve body, foreign substances that are contained in the fluid and easily collect on the bottom surface on the upstream side of the valve chamber are disposed along the bottom surface. It can be guided to the foreign material recovery chamber by the fluid flowing upstream, and is formed to be lower in the gravitational direction than the valve chamber, so that it is stored from the foreign material recovery chamber to the valve chamber side. It is possible to prevent foreign matter from flowing out.

  As a result, foreign matter is prevented from accumulating on the bottom surface of the valve chamber, and this foreign matter is not caught between the body and the valve body or between the seal member and the valve body. The operability of the body can be improved and the sealing performance can be prevented from being lowered.

  According to the present invention, the following effects can be obtained.

  That is, the valve chamber of the body in which the valve body is rotatably accommodated has a foreign substance recovery chamber capable of storing foreign substances contained in the fluid upstream thereof, and the bottom surface of the foreign substance recovery chamber is connected to the valve chamber. By forming it so that it is below the bottom surface in the direction of gravity, it is preferable to guide foreign matter in the fluid that tends to accumulate on the upstream bottom surface in the valve chamber to the foreign material recovery chamber by the fluid flowing upstream along the bottom surface. In addition, it is possible to prevent foreign matter stored from the foreign matter collection chamber to the valve chamber side from flowing out. As a result, it is avoided that foreign matter accumulates on the bottom surface of the valve chamber, and by avoiding biting of the foreign matter between the body and the valve body or between the seal member and the valve body, As well as improving the operability, it is possible to prevent deterioration of the sealing performance.

1 is an overall cross-sectional view of a fluid control valve according to an embodiment of the present invention.

  A preferred embodiment of a fluid control valve according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a fluid control valve according to an embodiment of the present invention. In the following description, the case where the fluid control valve 10 is applied to a cooling water circuit of an internal combustion engine or the like will be described.

  As shown in FIG. 1, the fluid control valve 10 includes a body 12, a valve body 14 that is provided so as to be rotatable with respect to the body 12, and a drive that is provided on the body 12 and rotationally drives the valve body 14. The body 12 is made of, for example, a resin material, and includes a main body portion 18 in which the valve body 14 is accommodated, and an introduction portion (introduction port) to which fluid is supplied protruding from the main body portion 18. ) 20 and a lead-out portion (lead-out port) 22 that protrudes in the opposite direction to the introduction portion 20 with respect to the main body portion 18 and discharges the fluid.

  The main body 18 is formed in, for example, a rectangular cross section, and a storage chamber (valve chamber) 24 in which the valve body 14 is stored is formed at the center thereof, and below the storage chamber 24 (in the direction of arrow A). A cover member 28 is attached to the opening 26 that is opened to close the opening. The cover member 28 has a fitting convex portion 30 that protrudes upward (in the direction of arrow B) and is fitted into the storage chamber 24, and the center of the fitting convex portion 30 faces further upward. A shaft-like support shaft 32 protruding in this manner is provided.

  The main body 18 is formed with a shaft hole 34 extending in the axial direction (the directions of arrows A and B) in the upper portion of the storage chamber 24, and the shaft hole 34 is packed through an annular groove inside the shaft hole 34. 36 and a dust seal 38 are provided.

  On the other hand, on the inner wall surface of the main body 18, a first opening (introduction port) 40 that opens upstream (in the direction of arrow C) and communicates with the introduction unit 20 described later, and opens downstream (in the direction of arrow D). A second opening (leading port) 42 communicating with the lead-out part 22 described later is formed, and the first and second openings 40 and 42 are in a horizontal direction (arrows C and D perpendicular to the axial direction of the main body part 18). Direction) with a circular cross section, and is formed in a straight line in the horizontal direction across the storage chamber 24.

  Further, the main body 18 is formed with a foreign substance collection chamber 44 that can store foreign substances at a position below the first opening 40 in the direction of gravity. It is formed on the upstream side (in the direction of arrow C) of the inner wall surface of the opening 40, and is formed at a position lower than the bottom surface 46 of the storage chamber 24 by a predetermined height in the direction of gravity (in the direction of arrow A). The storage chamber 24 communicates with the hole 45. That is, the foreign substance collection chamber 44 is formed in a stepped shape downward with respect to the storage chamber 24.

  The introduction hole 45 is formed so as to be narrower than the foreign substance collection chamber 44 in the height direction of the body 12 (directions of arrows A and B).

  Further, a seal member 48 is provided on the inner wall surface of the main body 18 where the first opening 40 is opened. The seal member 48 is formed of an elastic material such as rubber, for example, in a rectangular shape in cross section, and is formed in the central portion and has a circular cross section through hole 50 penetrating in the thickness direction (arrow C, D direction). It has a sealing surface 52 formed on the end surface facing the storage chamber 24 side which is the outer peripheral side of the hole 50. The seal surface 52 is formed in a cross-sectional arc shape when viewed from the axial direction of the main body portion 18, and is formed so that the outer peripheral surface of the valve body 14 can come into contact therewith.

  The introduction portion 20 is formed, for example, in a tubular shape, protrudes from the one side portion of the main body portion 18 along a horizontal direction (arrow C direction) by a predetermined length, and an introduction flow channel 54 is formed therein, and the main body portion The introduction part 20 and the storage chamber 24 communicate with each other by communicating with the 18 first openings 40. A tube (not shown) is connected to the end of the introduction unit 20, and a fluid is supplied from a fluid supply source (not shown) to the introduction channel 54.

  The lead-out part 22 is formed in a tubular shape like the introduction part 20 and protrudes from the other side part of the main body part 18 by a predetermined length along the horizontal direction (arrow D direction) so as to be opposite to the introduction part 20. ing. That is, the introduction part 20 and the lead-out part 22 are provided so as to be in a straight line with the main body part 18 interposed therebetween.

  In addition, a lead-out flow path 56 that extends straight from the end portion to the storage chamber 24 is formed inside the lead-out portion 22, and communicates with the second opening 42 of the main body portion 18 so that the lead-out portion 22 and the lead-out portion 22 are stored. The chamber 24 is in communication. A tube (not shown) is connected to the end of the lead-out part 22, and the fluid flowing from the introduction part 20 to the storage chamber 24 is discharged to the coolant circuit of the internal combustion engine (not shown) through the lead-out flow path 56 of the lead-out part 22. Is done.

  The valve body 14 includes, for example, a valve portion 58 housed in the housing chamber 24, a shaft portion 60 extending in the axial direction (arrow B direction) from the center of the upper end portion of the valve portion 58, and the cover member 28. And a support hole 62 into which the support shaft 32 is inserted.

  The valve portion 58 is formed of, for example, a cylindrical body having a circular cross section when viewed from the axial direction of the shaft portion 60, and a valve hole 64 penetrating in a direction orthogonal to the axial direction of the shaft portion 60 is formed. The hole 64 has a circular cross section and is formed so as to penetrate the outer peripheral surface of the valve portion 58. The outer peripheral surface of the valve portion 58 contacts the seal surface 52 of the seal member 48 provided on the body 12 and rotates while sliding.

  The shaft portion 60 is inserted into the shaft hole 34 of the body 12, and the packing 36 and the dust seal 38 are in sliding contact with the outer peripheral surface thereof, so that the shaft portion 60 is rotatably supported with respect to the shaft hole 34 and the shaft hole 34. And the shaft 60 are prevented from leaking fluid from the storage chamber 24, and dust and the like from entering the storage chamber 24 from the outside are prevented. The upper end portion of the shaft portion 60 protrudes outside the main body portion 18 through the shaft hole 34.

  The support hole 62 is formed at the center of the lower end of the valve part 58 facing the cover member 28, and is supported rotatably by inserting the support shaft 32 of the cover member 28.

  The drive unit 16 is composed of, for example, a rotational drive source such as a DC motor or a stepping motor, and rotates by a predetermined angle in a predetermined direction based on a control signal from a controller (not shown). And the drive part 16 is provided in the upper part of the main-body part 18 in the body 12, and when the upper end part of the axial part 60 is connected, the valve body 14 is stored in the storage chamber 24 via the axial part 60 under the energization action. It rotates in a predetermined direction and at a predetermined angle.

  The fluid control valve 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effects thereof will be described.

  First, in the fluid control valve 10, the valve hole 64 of the valve body 14 is set at a position orthogonal to the introduction flow path 54 and the discharge flow path 56, so that the valve body 14 causes the introduction flow path 54 and the discharge flow path 56. The valve is closed when communication with is closed. Therefore, the fluid supplied from the fluid supply source (not shown) to the introduction flow path 54 of the introduction part 20 does not flow to the lead-out flow path 56 of the lead-out part 22 through the storage chamber 24 of the body 12.

  Next, when the drive unit 16 is driven based on a control signal from a controller (not shown), the valve body 14 starts rotating in a predetermined direction together with the shaft unit 60 and rotates about 90 °. 1, both end portions of the valve hole 64 in the valve body 14 face the first and second openings 40 and 42 of the storage chamber 24, respectively, and are aligned with the introduction channel 54 and the outlet channel 56. The valve is open.

  As a result, the fluid supplied to the introduction passage 54 flows to the outlet passage 56 on the downstream side (in the direction of arrow D) through the valve hole 64 of the valve body 14 and is led out to the cooling water circuit of the internal combustion engine (not shown). Is done.

  Further, when the fluid that has flowed into the storage chamber 24 flows downstream (in the direction of arrow D) through the valve hole 64 of the valve body 14, a part of this fluid is along the inner wall surface and the bottom surface 46 of the storage chamber 24. By flowing to the upstream side (in the direction of arrow C), even if foreign matter contained in the fluid accumulates on the bottom surface 46 of the storage chamber 24 under the action of gravity, the fluid flow guided to the upstream side is preferable. The foreign matter is pushed upstream and guided to the foreign matter collection chamber 44 through the introduction hole 45 opened so as to face the bottom surface 46 and stored therein.

  That is, by providing the foreign substance collection chamber 44 that is lower than the bottom face 46 of the body 12 in the direction of gravity, the foreign substance is prevented from accumulating on the bottom face 46.

  As described above, in the present embodiment, the fluid flowing into the storage chamber 24 in the valve open state in which the introduction part 20 and the lead-out part 22 communicate with each other through the valve hole 64 under the rotational action of the valve body 14. As a part of the fluid flows to the upstream side along the bottom surface 46 of the storage chamber 24, the foreign matter accumulated on the bottom surface 46 is pushed away by the fluid into the foreign matter collection chamber 44 opened upstream and into the interior. Can be stored.

  As a result, foreign matter does not accumulate on the bottom surface 46 of the storage chamber 24, and the foreign matter is prevented from accumulating in the body 12, so that the foreign matter is sealed between the body 12 and the valve body 14. Biting between the valve body 14 and the valve body 14 is avoided, and accordingly, the operability of the valve body 14 can be improved and the sealing performance can be prevented from being lowered.

  Further, since the foreign matter collection chamber 44 communicates with the storage chamber 24 through an introduction hole 45 narrower in the height direction than the foreign matter collection chamber 44, the foreign matter stored in the foreign matter collection chamber 44 is narrowly introduced. 45, it is difficult to move to the storage chamber 24 side, and the outflow of the foreign matter is suitably suppressed.

  Further, the foreign matter collection chamber 44 is not limited to the case where it is provided in the main body portion 18 of the body 12 as described above. For example, the foreign matter collection chamber 44 may be provided in a mounting portion between the main body portion 18 and the cover member 28. Alternatively, the cover member 28 may be detachable from the main body 18 so that the foreign matter stored in the foreign matter collection chamber 44 can be collected.

  Furthermore, the fluid control valve 10 is not limited to a case where the fluid control valve 10 is applied to a cooling water circuit of an internal combustion engine or the like, for example, a cooling water circuit for cooling a motor or a cooling water circuit for cooling a battery. It may be used for the purpose of controlling the flow of gas such as gas instead of liquid such as cooling water.

  In addition, the fluid control valve according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Fluid control valve 12 ... Body 14 ... Valve body 16 ... Drive part 18 ... Main-body part 20 ... Introducing part 22 ... Deriving part 24 ... Storage chamber 28 ... Cover member 44 ... Foreign material collection chamber 46 ... Bottom surface 48 ... Sealing member

Claims (1)

A body having an inlet through which fluid is introduced and an outlet through which the fluid is led out, and a valve body provided rotatably in a valve chamber of the body, the valve body at the center of rotation A fluid control valve having a valve hole penetrating in a direction orthogonal to the valve body, and switching a communication state between the inlet and the outlet through the valve hole under the rotating action of the valve body;
The body has a foreign substance collection chamber that opens to the upstream side that is the inlet side in the valve chamber and can store foreign substances contained in the fluid,
The fluid control valve according to claim 1, wherein a bottom surface of the foreign substance recovery chamber is formed to be lower than a bottom surface of the valve chamber in a gravitational direction.

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