JP2019157953A - 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 element 14 is rotatably housed in a housing chamber 24 of a body 12, and the valve element 14 has a valve hole 56 penetrated in a direction orthogonal to an axial direction of first and second shaft portions 52, 54. The valve hole 56 is formed with a constant diameter along a longitudinal direction, and a communication hole 58 is formed on a position at its upstream-side opening 60 side. The communication hole 58 is formed in a manner of being orthogonal to an extension direction of the valve hole 56 and penetrating through the valve hole 56 and an outer peripheral face of the valve portion 50. As a part of a fluid flowing in the valve hole 56 is led out to an outer peripheral side of the valve portion 50 through the communication hole 58, foreign matters in a housing chamber 24 is pushed out and discharged.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 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 fluid control valve of Patent Document 1 described above, when foreign matter contained in the fluid enters the valve storage chamber, the foreign matter accumulates in the bottom of the valve storage chamber under the action of gravity, and the flow of the fluid occurs. May accumulate in weak areas. Then, the accumulated foreign matter is caught between the valve body and the body or between the valve body and the packing, causing a problem of malfunction or causing a problem that 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 thereof, and switches the communication state between the inlet and the outlet under the rotational action of the valve body.
The valve body has a communication path that communicates the outer peripheral surface facing the valve chamber and the valve hole. When the valve is opened when the introduction port and the discharge port communicate with each other through the valve hole, the communication path is an extension of the valve hole. It is characterized by being formed at a position on the upstream side of the center along the direction.

  According to the present invention, the valve body rotatably accommodated in the body is formed with a valve hole penetrating in a direction orthogonal to the rotation center, and the valve hole and an outer peripheral surface facing the valve chamber are formed. A communicating passage is formed, and at the time of valve opening when the introduction port and the outlet port communicate with each other through the valve hole, the communication passage is formed at a position upstream of the center along the extending direction of the valve hole. .

  Therefore, in a state where the valve body is rotating from the valve closed state to the valve open state, the communication path is arranged so as to communicate with the inlet through the upstream opening in the valve hole and to be substantially linear. Therefore, a part of the fluid flowing into the valve hole can be circulated through the communication path and led out from the outer peripheral surface of the valve body into the valve chamber.

  As a result, the foreign matter in the valve chamber is pushed away by the fluid led out from the communication passage, so that the accumulation of the foreign matter in the valve chamber is suppressed, and this foreign matter is placed between the body and the valve body or between the seal member and the valve body. Since it is not bitten, the operability of the valve 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, in the valve body, a communication passage that communicates the valve hole and the outer peripheral surface facing the valve chamber is formed, and when the valve is opened and the introduction port and the discharge port communicate with each other through the valve hole, the communication passage serves as the valve hole. By forming it at a position upstream of the center along the extending direction, a communication path is introduced through the upstream opening in the valve hole in the middle of rotation when switching from the valve closed state to the valve open state. Since it communicates with the opening and is arranged so as to be substantially linear, a part of the fluid flowing into the valve hole can be led out from the outer peripheral surface of the valve element into the valve chamber through the communication passage. As a result, the foreign matter in the valve chamber is preferably pushed away by the fluid led out from the communication passage, thereby suppressing the accumulation of foreign matter, and the foreign matter is caught between the body and the valve body or between the seal member and the valve body. By preventing the insertion, the operability of the valve body can be improved and at the same time the deterioration of the sealing performance can be prevented.

1A is an overall cross-sectional view of a fluid control valve according to an embodiment of the present invention, and FIG. 1B is an enlarged cross section showing a state in the middle of switching between a valve closed state and a valve open state in the fluid control valve of FIG. 1A. FIG.

  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 FIGS. 1A and 1B, the fluid control valve 10 includes a body 12, a valve body 14 that is rotatably provided with respect to the body 12, and a valve body 14 that is provided on the body 12 and rotates 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 that protrudes from the main body portion 18 and is supplied with fluid. (Introduction port) 20 and a lead-out portion (outlet 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 FIG. 1A, The cover member 26 is attached to the opening that opens in the direction of arrow A) and is closed. In the center of the cover member 26, a support hole 28 that is further depressed downward is provided.

  The main body 18 is formed with a shaft hole 30 extending in the axial direction (direction of arrow B) in the upper portion of the storage chamber 24, and the shaft hole 30 has an packing groove 32 and an annular groove inside. A dust seal 34 is provided.

  On the other hand, on the inner wall surface of the main body 18, a first opening (introduction port) 36 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) 38 communicating with the lead-out portion 22 described later is formed and communicated with the storage chamber 24, respectively.

  Further, the storage chamber 24 of the main body 18 is provided with a seal member 40 on the inner wall surface of the first opening 36, and the seal member 40 is formed in a rectangular cross section from an elastic material such as rubber, for example. A through-hole 42 having a circular cross section is formed in the central portion and penetrates in the thickness direction (arrow C, D direction), and the seal surface on which the outer peripheral surface of the valve body 14 can slide in contact with the outer peripheral side of the through-hole 42 44 is formed.

  The introduction portion 20 is formed, for example, in a tubular shape, and protrudes from a side portion of the main body portion 18 by a predetermined length along a horizontal direction (arrow C direction) orthogonal to the axial direction of the main body portion 18. The introduction channel 46 is formed, and the introduction unit 20 and the storage chamber 24 communicate with each other by communicating with the first opening 36 of the main body unit 18. A tube (not shown) is connected to the end of the introduction unit 20, and fluid is supplied from a fluid supply source (not shown) to the introduction channel 46.

  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.

  In addition, a lead-out flow channel 48 extending straight from the end portion to the storage chamber 24 is formed inside the lead-out portion 22, and communicates with the second opening 38 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 a coolant circuit of the internal combustion engine (not shown) through the lead-out flow path 48 of the lead-out part 22. Is done.

  The valve body 14 includes, for example, a valve portion 50 housed in the housing chamber 24, a first shaft portion 52 extending along the axial direction (arrow B direction) from the center of the upper end portion of the valve portion 50, and the valve And a second shaft portion 54 projecting in the axial direction (the direction of arrow A) from the center of the lower end portion of the portion 50.

  The valve portion 50 is formed of, for example, a cylindrical body having a circular cross section when viewed from the axial direction of the first and second shaft portions 52 and 54, and a valve hole 56 penetrating in a horizontal direction perpendicular to the axial direction. And a communication hole (communication path) 58 extending so as to be orthogonal to the valve hole 56.

  The valve hole 56 is formed to have a circular cross section, for example, so as to penetrate the outer peripheral surface of the valve portion 50, and extends with a constant diameter along the axial direction. Further, the valve hole 56 has an upstream opening 60 that faces the first opening 36 that is upstream when the valve shown in FIG. 1A is open, and a downstream opening 62 that faces the second opening 38 that is downstream. ing.

  The communication hole 58 is formed, for example, with a smaller diameter than the valve hole 56, is formed with a constant diameter so as to penetrate between the outer peripheral surface of the valve portion 50 and the valve hole 56, and the length in the valve hole 56 is long. It is formed at a position on the upstream opening 60 side (in the direction of arrow C in FIG. 1A) from the center in the direction. In other words, the communication hole 58 is provided at a position upstream from the center in the longitudinal direction of the valve hole 56.

  Further, the communication hole 58 opens to the outer peripheral surface on the downstream side of the valve body 14, that is, the position facing the second opening 38 of the body 12 in the valve closed state of the valve body 14, and is shown in FIG. 1B. In a state in which the valve body 14 is in the middle of rotation for switching between the valve closed state and the valve open state, the valve body 14 is formed so as to face the first opening 36 of the body 12 through the upstream opening 60 of the valve hole 56.

  Then, the outer peripheral surface of the valve portion 50 rotates while abutting and sliding on the seal surface 44 of the seal member 40 provided on the body 12.

  The first shaft portion 52 is inserted into the shaft hole 30 of the body 12, and the packing 32 and the dust seal 34 are in sliding contact with the outer peripheral surface thereof, so that the first shaft portion 52 is rotatably supported with respect to the shaft hole 30. A portion protrudes outside the main body portion 18 through the shaft hole 30.

  The second shaft portion 54 is formed coaxially with the first shaft portion 52 with the valve portion 50 interposed therebetween, and is rotatably supported by being inserted into the support hole 28 of the cover member 26.

  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 1st axial part 52 is connected, the valve body 14 via the 1st axial part 52 under the electricity supply effect | action. Rotates in the storage chamber 24 by a predetermined direction and 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 56 of the valve body 14 is set at a position orthogonal to the introduction flow path 46 and the discharge flow path 48, so that the outer peripheral surface of the valve body 14 in contact with the seal member 40 The valve is in a closed state in which the communication between the inlet channel 46 and the outlet channel 48 is blocked. In this case, the communication hole 58 is disposed so as to face the second opening 38 of the body 12, and the seal member 40 is in contact with the outer peripheral surface facing the upstream side of the valve body 14. The upstream side and the downstream side do not communicate with each other via 58.

  As a result, the fluid supplied from the fluid supply source (not shown) to the introduction channel 46 of the introduction unit 20 does not flow to the outlet channel 48 of the outlet unit 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 unit 50 rotates together with the first shaft unit 52 in a predetermined direction (the direction of arrow E in FIG. 1B). First, the upstream opening 60 rotates toward the first opening 36 and the downstream opening 62 rotates toward the second opening 38. Then, as shown in FIG. 1B, when a part of the upstream opening 60 exceeds the seal surface 44 of the seal member 40, the introduction channel 46 and the outlet channel 48 begin to communicate with each other through the valve hole 56. As a result, the fluid from the introduction channel 46 flows into the valve hole 56 through the through hole 42 of the seal member 40, and begins to flow to the outlet channel 48 through the storage chamber 24.

  During the rotation of the valve body 14 from the valve closed state to the valve open state, the introduction flow path 46 (first opening 36) and the communication hole 58 are substantially linear via the upstream opening 60 of the valve hole 56. As a result, a part of the fluid flowing into the valve hole 56 flows from the valve hole 56 to the communication hole 58 and is led out from the outer peripheral surface of the valve portion 50 into the storage chamber 24. The fluid led out from the outer peripheral surface of the valve portion 50 flows downstream (in the direction of arrow D) along the inner wall surface of the storage chamber 24, so that the foreign matter accumulated in the storage chamber 24 flows. Is pushed downstream and discharged from the outlet channel 48.

  Further, when the valve body 14 further rotates, the valve body 14 is rotated by about 90 ° from the closed state, and the upstream opening 60 of the valve hole 56 in the valve body 14 faces the first opening 36 as shown in FIG. 1A. Then, the downstream opening 62 faces the second opening 38 and the valve hole 56 is in a valve open state in which it is aligned with the introduction flow path 46 and the discharge flow path 48.

  Thereby, the fluid supplied to the introduction flow path 46 further flows from the upstream opening 60 in the valve hole 56 to the downstream opening 62 to the downstream side (in the direction of arrow D) through the valve hole 56 of the valve body 14. By flowing through the second opening 38 to the outlet channel 48, the refrigerant is led to a cooling water circuit (not shown) of the internal combustion engine.

  As described above, in the present embodiment, the communication hole 58 that is substantially orthogonal to the valve hole 56 is formed in the valve portion 50 of the valve body 14 that constitutes the fluid control valve 10. The hole 56 is formed so as to be on the upstream opening 60 side that is the upstream side, and penetrates the valve hole 56 and the outer peripheral surface of the valve portion 50. As a result, the communication hole 58 communicates with the introduction flow path 46 via the upstream opening 60 of the valve hole 56 during the rotation of the valve body 14 from the valve closed state to the valve open state, and is substantially linear. Therefore, a part of the fluid flowing into the valve hole 56 is caused to flow from the outer peripheral surface of the valve part 50 into the storage chamber 24 by flowing from the valve hole 56 to the communication hole 58. be able to.

  As a result, the foreign matter accumulated in the storage chamber 24 can be suitably washed away by the fluid led out to the outside of the valve body 14 through the communication hole 58, and the foreign matter is accumulated in the storage chamber 24. In addition to being suppressed, it is possible to avoid the foreign matter from being caught between the body 12 and the valve body 14 and between the seal member 40 and the valve body 14, so that the operability of the valve body 14 can be improved. At the same time, it is possible to prevent deterioration of the sealing performance.

  In addition, by providing the communication hole 58 upstream of the longitudinal center of the valve hole 56, the opening portion of the communication hole 58 on the valve hole 56 side in the middle of the rotation of the valve body 14 is introduced into the introduction flow path 46 (first 1 opening 36). Therefore, for example, compared with the case where the communication hole 58 is provided on the downstream side of the valve hole 56, the fluid that has flowed into the valve hole 56 from the introduction flow path 46 is smoothly taken into the communication hole 58 and circulated. Can be made.

  Further, the communication hole 58 provided in the valve body 14 is not limited to the configuration penetrating in the direction orthogonal to the extending direction of the valve hole 56 as described above. It is possible to appropriately change the outflow direction of the fluid that flows out from the valve hole 56 to the outside of the valve unit 50 through the communication hole 58.

  In other words, by setting the angle of the communication hole 58 with respect to the valve hole 56 in accordance with the position where foreign substances are likely to accumulate in the storage chamber 24, the foreign substances accumulated by the fluid led out from the communication hole 58 are suitably used. Can be discharged.

  Furthermore, the fluid control valve 10 described above is not limited to the case where it 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 for cooling a battery. It may be used for a water circuit, or may be used for the purpose of controlling the flow of a gas such as a gas instead of a 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 24 ... Storage chamber 36 ... 1st opening 38 ... 2nd opening 40 ... Seal member 50 ... Valve part 56 ... Valve hole 58 ... Communication hole 60 ... Upstream side Opening 62 ... downstream opening

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 the communication state between the inlet and the outlet under the rotational action of the valve body;
The valve body has a communication passage that communicates the outer peripheral surface facing the valve chamber and the valve hole, and the communication passage is open when the introduction port and the discharge port communicate with each other through the valve hole. Is formed at a position upstream of the center along the extending direction of the valve hole.

Images