JP6118785B2 - Valve device - Google Patents

Description

  The present invention relates to a valve device disposed on a flow path through which liquid, gas, powder, or the like flows.

  2. Description of the Related Art Conventionally, there has been provided a valve device that opens / closes or switches a flow path through which a flow target such as liquid, gas, and powder flows.

  Such a valve device includes, for example, a valve body that is rotatably provided around a predetermined axis, in which a communication passage penetrating in a direction orthogonal or substantially orthogonal to the predetermined axis is formed, and the valve A housing in which a valve body housing chamber is formed, the housing having at least two main passages communicating with each other via a communication passage of the valve body in the valve body housing chamber, and the main passages communicating with each other An annular seat member disposed in the housing in correspondence with at least one of the main passages so as to face the periphery of the communicating passage of the valve body, and a biasing member that biases the seat member toward the valve body side (For example, refer patent document 1).

  The housing has an accommodating portion that accommodates the sheet member so as to be movable along the hole center of the main passage.

  The valve device can rotate the valve body around a predetermined axis. Therefore, the valve device can switch between a state in which the communication passage of the valve body is communicated with each main passage of the housing and a state in which a non-penetrating portion of the valve body is communicated with each main passage of the housing. . Accordingly, the valve device can open and close the flow path through which the flow object is circulated.

  By the way, in the said valve apparatus, between a valve body and a housing is sealed by making a seal member contact | abut on the non-penetrating part of a valve body. Therefore, the valve device is configured to be able to remove a flow target attached to the valve body so as to maintain a good contact between the valve body and the seat member.

  This will be described more specifically. In the valve device, the housing includes a supply path for allowing fluid supplied from the outside to flow into the housing portion, and a discharge path for blowing the fluid supplied to the supply path to the valve body, the valve body and the seat member, A discharge path that opens toward a region including the contact position of the valve member or a region in the vicinity of the contact position between the valve body and the seat member is formed.

  Therefore, in the valve device, when a fluid is supplied to the supply path, the fluid includes an area including the contact position between the valve body and the seat member from the discharge path, or the vicinity of the contact position between the valve body and the seat member. It is sprayed toward the area.

  Therefore, in the said valve apparatus, even if a flow target object adheres to the contact position of a valve body and a seat member, it is supposed that this flow target object can be removed from a valve body.

  However, in the valve device, as described above, the supply path always opens toward the valve body. Therefore, in the said valve apparatus, when supply of the fluid to a supply path is stopped, a distribution | circulation target object may enter into a discharge path or a supply path.

  Therefore, in the said valve apparatus, there exists a possibility that the flow of the fluid for spraying on a valve body may be prevented by the distribution | circulation target object which entered in the discharge path or the supply path. Therefore, the valve device may require maintenance on the supply path and the discharge path.

JP 2010-255750 A

  Then, this invention makes it a subject to provide the valve apparatus which can prevent a distribution target object entering in the distribution path of the fluid sprayed on a valve body.

  The valve device according to the present invention is a valve body that is provided so as to be rotatable about a predetermined axis, the valve body having a communication passage penetrating in a direction orthogonal or substantially orthogonal to the predetermined axis, and the valve A housing having a valve body housing chamber for interior body, the housing having at least two main passages communicating with each other via a communication passage of the valve body in the valve body housing chamber, and a valve in which the main passages communicate with each other A sheet member facing the periphery of the body communication path, comprising: an annular sheet member disposed in the housing corresponding to at least one of the main passages; and an annular member disposed in the housing; The housing includes a housing portion that houses the sheet member and the annular member, and a supply path that supplies fluid to the housing portion from the outside, and is at least one of the sheet member and the annular member Is configured to be movable in the hole center direction of the main passage, and has a pressure receiving portion that receives pressure from the fluid supplied to the supply path, and the annular member is formed in the hole center direction of the main passage. A contact portion that is aligned with the sheet member, and the contact portion is in contact with the sheet member as the sheet member and the annular member move relative to each other, and is separated from the sheet member. The discharge path for blowing the fluid supplied to the supply path toward the valve body is formed by the gap between the seat member and the contact portion of the annular member. It is characterized by that.

  According to the valve device having the above configuration, when a fluid is supplied from the outside to the supply path, at least one of the seat member and the annular member receives pressure from the fluid by the pressure receiving portion. Accordingly, at least one of the sheet member and the annular member moves in the hole center direction of the main passage.

  Accordingly, the contact portion of the annular member is separated from the sheet member, and a discharge path is formed by a gap between the sheet member and the contact portion of the annular member (the discharge path is opened).

  Therefore, the valve device can spray the fluid supplied to the supply path from the discharge path toward the valve body. Therefore, the said valve apparatus can remove the distribution | circulation target object adhering to the surface of a valve body.

  In the valve device, the seat member and the annular member can be brought into contact with each other by relatively moving the seat member and the annular member (the discharge path can be closed).

  As described above, in the valve device, by moving the seat member and the annular member relative to each other, the discharge path can be opened when the fluid is sprayed to the valve body, and the spraying of the fluid to the valve body is stopped. The discharge path can be closed when Therefore, the valve device can prevent the flow target from entering the discharge path or the supply path.

  As one aspect of the valve device of the present invention, at least one of the seat member and the annular member is urged so that the seat member and the contact portion of the annular member approach each other. You may do it.

  In this case, when the pressure applied to the fluid supplied to the supply path on at least one of the sheet member and the annular member becomes stronger than the biasing force on at least one of the sheet member and the annular member. The sheet member and the annular member move relative to each other.

  When the supply of fluid to the supply path is stopped, the sheet member and the contact portion of the annular member approach each other due to the biasing force applied to at least one of the sheet member and the annular member.

  Therefore, the valve device can more reliably close the discharge path when the supply of fluid to the supply path is stopped.

As another aspect of the valve device of the present invention, the valve body is configured to be rotatable about the predetermined axis in a non-contact state with respect to the seat member, and between both ends of the communication passage. non-through portion in a non-through portion formed, faces the sheet member with the switching of the communication path in a state of being rotated by the rotation around the predetermined axis from a state in which to communicate with the respective main passage And the non-penetrating portion is provided so as to be tiltable toward the seat member with one end side in the axial direction as a fulcrum in a state where the non-penetrating portion faces the seat member, and the valve body is tilted toward the seat member. The penetrating portion may be configured to be in pressure contact with the sheet member to block the main passage.

  In this way, since the valve body rotates without contact with the seat member, the wear of the seat member can be minimized, and the seal state between the valve body and the housing can be maintained for a long time. it can.

  As described above, according to the valve device of the present invention, it is possible to achieve an excellent effect that the flow target can be prevented from entering the flow path of the fluid sprayed onto the valve body.

FIG. 1 is a longitudinal sectional view of a valve device according to an embodiment of the present invention, and is a longitudinal sectional view showing a state in which a communicating hole of a valve body is made to correspond to a main passage of a housing. FIG. 2 is a longitudinal sectional view of the valve device according to the embodiment, and is a longitudinal sectional view showing a state in which a non-penetrating portion of the valve body corresponds to the main passage of the housing. FIG. 3 is a partially enlarged view of the valve device according to the embodiment, and is a partially enlarged view of a state in which the communication hole of the valve body is made to correspond to the main passage of the housing. FIG. 4 is a partially enlarged view of the valve device according to the embodiment, and is a partially enlarged view showing a state where a non-penetrating portion of the valve body is in contact with the seat member. . FIG. 5 is a partially enlarged cross-sectional view of the valve device according to the embodiment, and is a partially enlarged cross-sectional view in a state where the discharge path is closed. FIG. 6 is a partially enlarged cross-sectional view of the valve device according to the embodiment, and is a partially enlarged cross-sectional view in a state where the discharge path is open.

  Hereinafter, a valve device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  The valve device according to the present embodiment is for opening / closing or switching a flow path through which an object to be circulated such as liquid, gas, and powder is circulated.

  As shown in FIGS. 1 and 2, the valve device 1 according to the present embodiment is a valve body 2 provided so as to be rotatable around a predetermined axis L <b> 1, and a direction orthogonal or substantially orthogonal to the predetermined axis L <b> 1. A valve body 2 having a communication passage R1 penetrating therethrough, and a housing 3 in which a valve body housing chamber 30 that houses the valve body 2 is formed, and the communication passage of the valve body 2 in the valve body housing chamber 30 A housing 3 having at least two main passages R2, R3 communicating with each other via R1, and a seat member 4 facing the periphery of the communication passage R1 of the valve body 2 in which the main passages R2, R3 communicate with each other, An annular sheet member 4 disposed in the housing 3 corresponding to at least one of the main passages R2 and R3, and an annular member 5 disposed in the housing 3 are provided.

  Further, the valve device 1 includes a biasing member (hereinafter referred to as a first biasing member) 6 that biases the seat member 4 toward the valve body 2. The valve device 1 further includes a biasing member (hereinafter referred to as a second biasing member) 7 that biases the annular member 5 toward the valve body 2.

  In the valve device 1 according to the present embodiment, the valve body 2 is configured to be rotatable about the predetermined axis L1 in a non-contact state with respect to the seat member 4, and is open at both ends of the communication path R1. A non-penetrating portion formed therebetween is provided to be able to tilt toward the sheet member 4 with the one end side in the axial direction as a fulcrum in a state facing the sheet member 4.

  Accordingly, the valve device 1 is an axial stem S1 inserted through the housing 3 so as to pass through a predetermined axis L1, and the valve body 2 is connected to one end side in the axial direction (in this embodiment, the housing 3 of the housing 3). A stem (hereinafter referred to as a first stem) S1 that supports the valve body 2 to be tiltable at the lower end side and rotates the valve body 2 around a predetermined axis L1, and is opposite to the first stem S1 so as to pass through the predetermined axis L1. A shaft-like stem S2 inserted through the housing 3 on the side, and biasing the valve body 2 toward the seat member 4 at the other end side of the predetermined axis L1 (in this embodiment, the upper end side of the housing 3) And a stem (hereinafter referred to as a second stem) S2 for tilting the valve body 2.

  The valve body 2 is formed in a substantially spherical shape. The communication passage R <b> 1 of the valve body 2 is configured by a hole that is formed straight through the substantial center of the valve body 2.

  The valve body 2 is a stem insertion portion (hereinafter referred to as a first stem insertion portion) 20 for inserting a first stem S1 into a lower portion (one end side in a direction in which a predetermined axis L1 extends), and has a concave first shape. It has a stem insertion part 20. Further, the valve body 2 is a stem insertion portion (hereinafter referred to as a second stem insertion portion 21) 21 for inserting the second stem S2 into the upper portion (the other end side in the direction in which the predetermined axis L1 extends), and has a concave shape. A second stem insertion portion 21 is provided.

  In the present embodiment, the direction in which the predetermined axis L1 extends is described as the axial direction.

  As shown in FIGS. 3 and 4, the first stem insertion portion 20 is formed with a pair of first plane portions 200 (see FIG. 4) extending in a direction orthogonal to the axial direction with the predetermined axis L <b> 1 interposed therebetween. In addition, a pair of second plane portions 201 (see FIG. 3) that form a right angle or a substantially right angle with the pair of first plane portions 200 and extend in a direction orthogonal or substantially orthogonal to the predetermined axis L1 are the predetermined axis L1. It is formed on both sides.

  As described above, the first stem insertion portion 20 is formed in a concave shape. Therefore, the first stem insertion portion 20 has a bottom surface that extends in a direction orthogonal to the axial direction, and a peripheral wall that hangs down from the bottom surface. Therefore, in this embodiment, the 1st plane part 200 and the 2nd plane part 201 are comprised by the surrounding wall.

  As shown in FIG. 4, the second stem insertion portion 21 includes a first pressed portion 210 that extends in a direction orthogonal to the axial direction, and a second pressed portion that is parallel or roughly parallel to the first pressed portion 210. 211.

  Therefore, when the non-penetrating part of the valve body 2 and the sheet member 4 are opposed to each other, the valve body 2 is pressed by a later-described pressing shaft portion S20 of the second stem S2. , It is configured to be displaced (tilted) toward the seat member 4 (the non-penetrating portion of the valve body 2 is in close contact with the seat member 4).

  Further, when the second pressed portion is pressed by a later-described pressing shaft portion S20 of the second stem S2 in a state where the non-penetrating portion of the valve body 2 and the seat member 4 face each other, The valve body 2 is forcibly displaced to the opposite side from the state displaced to the sheet member 4 side (the non-penetrating portion of the valve body 2 is separated from the sheet member 4).

  As shown in FIGS. 1 and 2, the housing 3 includes a housing portion 31 that houses the sheet member 4 and the annular member 5. The housing 3 also has a supply path 32 for supplying a fluid therein.

  In the housing 3, two main passages R <b> 2 and R <b> 3 are formed so as to face each other with the valve body housing chamber 30 interposed therebetween. The two main passages R2, R3 are formed so as to be substantially concentric with the communication passage R1 of the valve body 2. Further, the two main passages R2, R3 are set to have the same diameter as the inner diameter of the communication passage R1 of the valve body 2.

The housing 3 will be described more specifically. The housing 3 according to this embodiment is
It has a main frame 33 in which the valve body 2 is disposed, and a sub-frame 34 attached to the main frame 33. Further, in the housing 3, the valve body accommodating chamber 30 is formed inside with the sub frame 34 attached to the main frame 33.

  The main frame 33 is formed in the main body portion 330 in which the valve body 2 is disposed, an insertion portion (hereinafter referred to as a first stem insertion portion) 331 formed in the main body portion 330, and the main body portion 330. Insertion portion (hereinafter referred to as a second stem insertion portion) 332. The main frame 33 is a tubular pipe connection part 333 and has a pipe connection part 333 connected to the main body part 330.

  The main body 330 has a space in which the valve body 2 can be accommodated in a non-contact state. That is, the main body portion 330 is formed with a recess in which an opening (not numbered) for inserting the valve body 2 is formed on one side surface. The opening of the main body 330 is formed in a substantially circular shape with a center line L2 orthogonal to a predetermined axis L1 of the valve body 2 passing through the approximate center of the valve body accommodating chamber 30 (recess).

  Thus, the housing 3 is configured to define a valve body accommodating chamber 30 for housing the valve body 2 therein by attaching the sub frame 34 to the main frame 33.

  The pipe connection part 333 is formed in a cylindrical shape as described above. Therefore, in the housing 3, one of the two main passages R <b> 2 and R <b> 3 is constituted by a space inside the pipe connection portion 333. In the housing 3, the space inside the pipe connection portion 333 and the space inside the main body portion 330 communicate with each other.

  The sub frame 34 is an attachment portion 340 attached to the main frame 33, and has an attachment portion 340 formed in a cylindrical shape.

  The attaching portion 340 has a first end in the hole center direction and a second end opposite to the first end. The attachment portion 340 has a first end attached to the main frame 33. Further, as described above, the attachment portion 340 is formed in a cylindrical shape. Therefore, the attachment portion 340 has a hole that penetrates in a direction orthogonal to a direction in which the predetermined axis L1 extends (hereinafter referred to as the axial direction).

  As shown in FIG. 5, in the housing 3 according to this embodiment, the accommodating portion 31 is configured by a part of the inner peripheral surface of the attachment portion 340.

  This will be described more specifically. The sub frame 34 is an arrangement portion (hereinafter referred to as a first arrangement portion) 341 formed inside the attachment portion 340, and is formed inside the attachment portion 340 and a first arrangement portion 341 where the sheet member 4 is arranged. It is the arrangement | positioning part (henceforth a 2nd arrangement | positioning part) 342 342, Comprising: The 2nd arrangement | positioning part 342 which arrange | positions the annular member 5 is further provided.

  The first placement portion 341 is formed on the first end side of the attachment portion 340. The second placement portion 342 is formed at a position adjacent to the first placement portion 341.

  The inner diameter of the portion that defines the second arrangement portion 342 on the inner peripheral surface of the attachment portion 340 is smaller than the inner diameter of the portion that defines the first arrangement portion 341 on the inner peripheral surface of the attachment portion 340. The inner diameter of the inner peripheral surface of the second end of the attachment portion 340 is smaller than the inner diameter of the portion that defines the second arrangement portion 342 on the inner peripheral surface of the attachment portion 340.

  Further, the sub frame 34 has a through hole 343 formed in the attachment portion 340. The through hole 343 has a first opening end that opens on the outer surface of the attachment portion 340 and a second opening end that opens on the inner peripheral surface of the attachment portion 340. The second opening end opens on a portion that defines the second arrangement portion 342 on the inner peripheral surface of the attachment portion 340. Therefore, in the housing 3 according to the present embodiment, the supply path 32 is configured by a through hole 343 formed in the attachment portion 340 in the subframe 34.

  The seat member 4 includes a seat ring 40 for press-contacting the valve body 2 and an annular holder 41 that can be installed with the seat ring 40 partially exposed.

  The seat ring 40 is configured such that a portion exposed from the holder 41 faces a portion around the communication path R1 in the valve body 2.

  The holder 41 has a holder main body portion 410 fitted into the first arrangement portion 341 of the attachment portion 340 and an extension portion 411 extending from the holder main body portion 410 toward the second arrangement portion 342 of the attachment portion 340. .

  The holder main body 410 has a first end on the valve body 2 side and a second end opposite to the first end. Therefore, the holder main body 410 is configured to partially expose the seat ring 40 on the first end side.

  The annular member 5 has a pressure receiving portion 50 that receives pressure from the fluid supplied to the supply path 32. The annular member 5 has an annular fitting part 51 fitted into the second arrangement part 342 and an extending cylinder part 52 extending from the fitting part 51 toward the valve body 2 side. Further, the annular member 5 has an abutting portion 53 aligned with the sheet member 4 in the hole center direction of the main passages R2 and R3.

  The pressure receiving unit 50 is configured by a surface facing the valve body 2 side. Therefore, the annular member 5 is configured to move in a direction opposite to the valve body 2 side by the pressure received by the pressure receiving portion 50 from the fluid.

  The fitting part 51 has a first surface facing the valve body 2 and a second surface opposite to the first surface. Therefore, the annular member 5 according to the present embodiment is configured by the first surface of the fitting portion 51.

  The second surface of the fitting portion 51 faces a portion that defines the accommodating portion 31 (second arrangement portion 342) on the inner surface of the housing 3. In addition, in the fitting part 51, the recessed part opened on a 2nd surface is formed, and a part of 2nd biasing member 7 is arrange | positioned in this recessed part. The inner diameter of the fitting portion 51 is set to be the same as or substantially the same as the inner diameter of the mounting portion 340 on the second end side.

  Further, the fitting portion 51 is formed between the second surface and the inner surface of the housing 3 when the contact portion 53 is not in contact with the sheet member 4 (when the pressure receiving portion 50 is not receiving pressure from the fluid). It arrange | positions so that a clearance gap may be formed among them. Therefore, in the valve device 1 according to the present embodiment, the annular member 5 moves away from the valve body 2 as the seat member 4 is pushed and moved by the valve body 2.

  The extending cylinder part 52 extends from the first end of the fitting part 51 in a direction orthogonal to the axial direction. Therefore, the extension cylinder part 52 has a proximal end connected to the fitting part 51 and a distal end opposite to the proximal end.

  The outer diameter of the extension cylinder part 52 is smaller than the outer diameter of the fitting part 51. Therefore, a space is formed between the outer peripheral surface of the extending tube portion 52 and the inner peripheral surface of the attachment portion 340 (the portion that defines the second arrangement portion 342 on the inner peripheral surface of the attachment portion 340). .

  Further, the outer diameter of the extending tube portion 52 is set smaller than the inner diameter of the extending portion 411 of the sheet member 4. And the 2nd end side of the extension cylinder part 52 is arrange | positioned inside the extension part 411 of the sheet | seat member 4. FIG. Therefore, a gap is formed between the outer peripheral surface of the second end of the extended cylindrical portion 52 and the inner peripheral surface of the extended portion 411 in the sheet member 4.

  The second end of the extended cylindrical portion 52 is configured to be able to contact the sheet member 4. That is, in the annular member 5, the abutting portion 53 is configured by the second end of the extending cylindrical portion 52. Therefore, in the valve device 1 according to the present embodiment, the fluid supplied to the supply path 32 is valved by the gap between the seat member 4 (the inner peripheral surface of the seat member 4) and the contact portion 53 of the annular member 5. A discharge path 35 for spraying toward the body 2 is formed.

  As described above, a gap is formed between the outer peripheral surface of the extended cylinder portion 52 and the inner peripheral surface of the attachment portion 340. Therefore, the discharge path 35 according to the present embodiment is attached to the gap between the sheet member 4 (the inner peripheral surface of the sheet member 4) and the contact portion 53 of the annular member 5, and the outer peripheral surface of the extended cylindrical portion 52. It is comprised by the clearance gap between the internal peripheral surfaces of the part 340. FIG.

  The inner diameter of the extension cylinder part 52 is set to be the same as the inner diameter of the fitting part 51. Therefore, in the valve device 1 according to the present embodiment, the inner diameter on the second end side of the mounting portion 340, the inner diameter of the fitting portion 51, and the inner diameter of the extending tube portion 52 are set to the same or substantially the same size. Has been. And in the valve apparatus 1 which concerns on this embodiment, it is among two main channel | paths R2 and R3 by each of the inner surface of the 2nd end side of the attaching part 340, the inner surface of the fitting part 51, and the inner surface of the extension cylinder part 52. The other main passages R2 and R3 are configured.

  The first urging member 6 includes a first arrangement portion 341 of the attachment portion 340 (a surface in the attachment portion 340 that defines the first arrangement portion 341 and faces the valve body chamber 30 side), and the seat member 4. Between the second end of the holder 41 (the surface of the holder 41 main body facing away from the valve body accommodating chamber 30). Therefore, the first urging member 6 urges the seat member 4 toward the valve body accommodating chamber 30 side.

  Accordingly, the valve device 1 according to the present embodiment is provided with a stopper St that restricts the movement of the seat member 4 from the specified position toward the valve body housing chamber 30 (valve body 2) (FIG. 1). , See FIG. In the present embodiment, the specified position is the home position of the seat member 4, and the valve body 2 is tilted toward the seat member 4, and the valve body 2 is relative to the seat member 4 (seat ring 40). It means the position of the sheet member 4 that can be properly pressed.

  Various types of members such as a coil spring and a disc spring can be adopted as the first urging member 6, and a disc spring is adopted in the present embodiment. The disc spring is formed in an annular shape, and the second end of the holder 41 of the seat member 4 and the inner surface of the housing 3 so that the center thereof is concentric or substantially concentric with the hole center CL of the main passages R2 and R3. It is intervened between. In the present embodiment, the three disc springs are provided so as to overlap in the direction of the hole center CL, and are provided so as to have a natural length in a state in which the sheet member 4 is located at a specified position.

  The second urging member 7 includes a second arrangement portion 342 of the attachment portion 340 (a surface that defines the second arrangement portion 342 and faces the valve body housing chamber 30 inside the attachment portion 340), and the annular member 5. Between the insertion portion 51 (the surface of the insertion portion 51 facing away from the valve body accommodating chamber 30). Therefore, the second urging member 7 urges the annular member 5 toward the valve body accommodating chamber 30 side.

  The second biasing member 7 is configured to apply a biasing force to the annular member 5 in a state where the contact portion 53 of the annular member 5 is in contact with the sheet member 4. .

  As shown in FIGS. 3 and 4, the first stem S <b> 1 is inserted through the housing 3 (first stem insertion portion 331). The first stem S1 has one end located in the housing 3 and a second end opposite to the one end. The first stem S <b> 1 has an insertion shaft portion S <b> 10 that is inserted into the first stem insertion portion 20 (a region surrounded by the pair of first plane portions 200 and the pair of second plane portions 201) of the valve body 2.

  Moreover, 1st stem S1 has a pair of protruding item | line part S100 formed in 1st insertion shaft part S10 (refer FIG. 4). Moreover, 1st stem S1 has a pair of contact surface part S101 arrange | positioned between a pair of convex strip part S100.

  Each ridge portion S100 extends in a direction orthogonal or substantially orthogonal to the predetermined axis L1 and faces the first flat surface portion 200.

  Each ridge portion S100 is formed to have a slight gap with respect to the opposed first flat surface portion 200. That is, the interval between the protrusions S100 is set to be narrower than the interval between the pair of first plane portions 200 so that the valve element 2 can be tilted, and when the valve element 2 is inclined, each protrusion S100 is It is comprised so that it may line-contact with each 1st plane part 200 which opposes.

  Further, the contact surface portion S101 is in surface contact with the second flat surface portion 201 on the opposite valve body 2 side. Therefore, the first stem S1 is configured to transmit torque when rotated around the predetermined axis L1 from the contact surface portion S101 to the second flat surface portion 201 of the valve body 2 and to allow tilting of the valve body 2. Has been.

  The first stem S1 can be manually rotated by attaching a handle or the like, but in the present embodiment, a drive motor (such as a pulse motor) that can arbitrarily set the rotation angle of the first stem S1. (Not shown) is connected to the other end side, and is rotated around a predetermined axis L1 of the valve body 2 by being driven by the drive motor.

  The second stem S2 is inserted through the housing 3 (second stem insertion portion 332). The second stem S2 has one end located in the housing 3 and a second end opposite to the first end. The second stem S2 has a pressing shaft portion S20 that is inserted into the second stem insertion portion 21 of the valve body 2.

  The pressing shaft portion S20 is an eccentric cam in which the center of curvature with respect to the curved outer peripheral surface is eccentric with respect to the axis of the insertion shaft portion S10. Therefore, when the second stem S2 is rotated around the predetermined axis L1 in a state in which the non-penetrating portion of the valve body 2 faces the seat member 4, the pressing shaft portion S20 moves the second stem S2 The one pressed part 210 is contacted or pressed.

  Further, the pressing shaft S20 rotates the second stem S2 in the reverse direction around the predetermined axis L1 in a state where the non-penetrating portion of the valve body 2 faces the seat member 4 (the first pressed portion 210 on the pressing shaft S20). ), The valve body 2 that is tilted (displaced) toward the seat member 4 side (non-rotating) can be pressed against the second pressed portion 211. The penetrating part) can be forcibly separated from the sheet member 4.

  Similarly to the first stem S1, the second stem S2 having the above configuration can be manually rotated by attaching a handle or the like. However, in this embodiment, the rotation angle of the second stem S2 is arbitrarily set. A drive motor (not shown) such as a pulse motor that can be set is connected to the other end side. That is, in the valve device 1 according to the present embodiment, when the valve body 2 is tilted by rotating the second stem S2 with a drive motor such as a pulse motor whose rotation angle can be arbitrarily set, the pressing shaft portion S20 (eccentric cam) ) To the valve body 2 is configured to be a predetermined pressing force.

  Thereby, when the pressing shaft portion S20 is worn and the pressing force on the valve body 2 becomes smaller than a predetermined pressing force, the pressing shaft portion S20 (second stem S2) is increased by increasing the rotation angle of the second stem S2. ), A predetermined pressing force can be applied to the valve body 2 with the existing pressing shaft portion S20.

  The rotation angle of the drive motor (second stem S2) may be set manually. For example, a torque sensor for measuring the torque of the second stem S2 is provided, and the detection result of the torque sensor is a predetermined value. Of course, the rotation angle of the drive motor may be controlled so as to be automatically changed so that the pressing force by the pressing shaft portion S20 becomes a predetermined pressing force.

  The valve device 1 according to the present embodiment is configured as described above. Next, the operation of the valve device 1 according to the present embodiment will be described.

  As shown in FIG. 1, the valve device 1 having the above-described configuration has two main passages R2 and R3 communicating with each other via the communication passage R1 of the valve body 2, and the other main passage R3 from one main passage R2 side. The distribution object is allowed to flow from the side (or from the other main passage R3 side to the one main passage R2 side).

  At this time, the valve body 2 is not in contact with the seat member 4. Further, the pressing shaft portion S20 is in a state where it is not pressed against any of the first pressed portion 210 and the second pressed portion 211 of the valve body 2.

  And in order to interrupt | block main passage R2, R3 from the state which permitted distribution | circulation of the distribution | circulation target object, only 1st stem S1 is rotated 90 degrees, maintaining 2nd stem S2 as it is. If it does in this way, the rotational force of 1st stem S1 will be transmitted to the 2nd plane part 201 of the valve body 2 via contact surface part S101, and the valve body 2 will rotate 90 degrees.

  When rotating the valve body 2 without rotating the second stem S2, the pressing shaft portion S20 (cam) does not press either the first pressed portion 210 or the second pressed portion 211 (the valve body 2). Maintained in a state where no biasing force is applied. If it does in this way, the valve body 2 will rotate in the surroundings of the predetermined | prescribed axis line L1 with a non-contact state with respect to the sheet | seat member 4. FIG.

  Thereby, the non-penetrating part of the valve body 2 is opposed to the one main passage R2 (seat member 4) with a gap therebetween. Further, the state in which the second flat surface portion 201 on the valve body 2 side that has transmitted the torque of the first stem S1 and the contact surface portion S101 of the first stem S1 are along the direction in which the valve body 2 is tilted (main passages R2, R3). In a state of being parallel or substantially parallel to the hole center CL. For this reason, the valve body 2 is allowed to tilt even if the second flat surface portion 201 and the contact surface portion S101 are in contact with each other.

  Then, when the second stem S2 is rotated, as shown in FIG. 2, the pressing shaft portion S20 presses the first pressed portion 210 (the upper side of the valve body 2), and the valve body 2 is moved to the seat member 4 side. The valve body 2 tries to tilt by the biasing. At this time, the valve body 2 tilts with the tip of the first stem S1 (support point supporting the valve body 2) as a tilting fulcrum, and the valve body 2 tilts a predetermined amount of movement, and the valve body 2 is not penetrated. The portion is pressed against the sheet member 4. Then, the seat member 4 (pressure contact portion 401) is elastically deformed by a deformation amount defined over the entire circumference by the pressure contact of the valve body 2, and as a result of sealing between the valve body 2 and the housing 3 by the elasticity, One main passage R2 (between the two main passages R2 and R3) is blocked, and the distribution of the distribution object is stopped.

  On the other hand, when the second stem S2 is reversely rotated (rotated to the opposite side to the case where the valve body 2 is displaced toward the seat member 4), the contact of the pressing shaft portion S20 with the first pressed portion 210 is released. On the other hand, the pressing shaft portion S20 presses the second pressed portion 211, and the valve body 2 is moved to the seat member 4 (the press contact portion 401) by the pressing action of the pressing shaft portion S20 against the second pressed portion 211. Tilt in a direction away from).

  As a result, while the valve body 2 returns to the original position, the seat member 4 is positioned at the specified position, and the valve body 2 and the seat member 4 return to a non-contact state (substantially constant interval). Then, when the first stem S1 is reversely rotated without rotating the second stem S2 (when the non-penetrating portion of the valve body 2 is opposed to the seat member 4), the valve body 2 is moved to the seat member. 4, the two main passages R2 and R3 communicate with each other via the communication passage R1 of the valve body 2 and return to a state in which the circulation of the circulation object is permitted.

  In the present embodiment, fluid is supplied to the supply passage 32 when the valve body 2 that communicates the two main passages R2, R3 with the communication passage R1 is rotated. Therefore, in the valve device 1, the seat member 4 and the abutting portion 53 of the annular member 5 are in contact with each other in a state where the flow target object is circulated through the two main passages R 2 and R 3 and the communication passage R 1 of the valve body 2. They are in contact (that is, the discharge path 35 is closed).

  When the fluid is supplied to the supply path 32 from the outside, the outer peripheral surface of the extending cylinder portion 52 and the inner peripheral surface of the attachment portion 340 (the portion that determines the second arrangement portion 342 on the inner peripheral surface of the attachment portion 340) The pressure in the space between increases.

  Thereby, the pressure from the fluid acts on the pressure receiving portion 50 of the annular member 5. When the pressure received by the pressure receiving portion 50 of the annular member 5 from the fluid becomes stronger than the urging force received by the fitting portion 51 of the annular member from the second urging member 7, the annular member 5 moves away from the valve body 2. Moving.

  Accordingly, the contact portion 53 of the annular member 5 is separated from the sheet member 4. A gap is formed between the sheet member 4 and the contact portion 53 of the annular member 5. That is, the discharge path 35 is opened. And the fluid supplied to the supply path 32 is sprayed toward the valve body 2 from the discharge path 35, and the distribution | circulation target object adhering to the surface of the valve body 2 is removed.

  When the supply of the fluid to the supply path 32 is stopped, the annular member 5 moves to the valve body 2 side by the urging force of the second urging member 7. Thereby, the sheet member 4 and the contact portion 53 of the annular member 5 contact each other. That is, the discharge path 35 is closed.

  In this way, in the valve device 1, the flow path of the fluid sprayed onto the valve body 2 is opened and closed.

  As described above, according to the valve device 1 according to the present embodiment, the discharge path 35 can be opened when the fluid is sprayed to the valve body 2, and the spraying of the fluid to the valve body 2 is stopped. The discharge path 35 can be closed when Therefore, the valve device 1 can prevent the flow object from entering the discharge path 35 and the supply path 32.

  Further, since the annular member 5 is urged toward the valve body 2 by the second urging member 7, as the supply of fluid to the supply path 32 is stopped, the seat member 4 and the annular member 5 contact parts 53 approach each other. Therefore, the valve device 1 can more reliably close the discharge passage 35 when the supply of the fluid to the supply passage 32 is stopped.

  In the valve device 1, the valve body 2 can be rotated without contact with the seat member 4. Therefore, the valve device 1 can minimize the wear of the seat member 4 and can maintain the sealed state between the valve body 2 and the housing 3 for a long period of time.

  The valve device 1 of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

  In the above embodiment, the valve body 2 can rotate in a non-contact manner with respect to the seat member 4, and the valve body is in a state in which the non-penetrating portions formed between the openings at both ends of the communication passage R1 face the main passages R2, R3 Although the non-contact type valve device 1 for tilting 2 has been described, the present invention is not limited to this. For example, in the valve device 1, the valve body 2 is always in pressure contact with the seat member 4 disposed in the housing 3, and when the valve body 2 is rotated around a predetermined axis L <b> 1, the valve body 2 is moved to the seat member 4. It may be a general ball valve (valve device 1) in sliding contact with.

  In the above-described embodiment, the annular member 5 is configured to be movable in the hole center direction of the main passages R2 and R3, and has a pressure receiving portion that receives pressure from the fluid supplied to the supply path. However, the present invention is not limited to this.

  For example, the annular member 5 may be fixed at a predetermined position. However, when the above configuration is adopted, the valve device 1 is configured such that the seat member 4 is movable in the hole center direction of the main passages R2 and R3 and receives a pressure from the fluid supplied to the supply passage. 50 is required to be configured.

  In this case, the annular member 5 may not be biased toward the valve body 2 side. Further, it is preferable that the seat member 4 is biased to the side opposite to the valve body 2 side, but the seat member 4 moves in a direction away from the valve body housing chamber 30 when the valve body 2 is pressed. It may be configured to.

  In this case, what is necessary is just to be comprised so that the contact part 53 of the sheet | seat member 4 and the annular member 5 can be mutually contacted by pressing the valve body 2 against the sheet | seat member 4. FIG.

  Although not particularly mentioned in the above embodiment, the supply path 32 (through hole 343) may be formed to open toward the pressure receiving part 50 of the annular member 5. In this way, the pressure from the fluid can be efficiently applied to the pressure receiving portion 50 of the annular member 5.

  When the sheet member 4 is configured to have a pressure receiving portion, the supply path 32 (through hole 343) may be formed so that the sheet member 4 opens toward the pressure receiving portion.

  DESCRIPTION OF SYMBOLS 1 ... Valve apparatus, 2 ... Valve body, 3 ... Housing, 4 ... Seat member, 5 ... Ring member, 20 ... First stem insertion part, 21 ... Second stem insertion part, 30 ... Valve body accommodation chamber, 31 ... Accommodation 32, supply path, 33 ... main frame, 34 ... subframe, 35 ... discharge path, 40 ... seat ring, 41 ... holder, 50 ... pressure receiving part, 51 ... fitting part, 53 ... contact part, 200 ... 1st plane part, 201 ... 2nd plane part, 210 ... 1st pressed part, 211 ... 2nd pressed part, 330 ... main body part, 331 ... 1st stem insertion part, 332 ... 2nd stem insertion part, 333 ... Pipe connection part, 340 ... Mounting part, 341 ... First arrangement part, 342 ... Second arrangement part, 343 ... Through hole, 401 ... Press contact part, 410 ... Holder body part, 411 ... Extension part, CL ... Center of hole , L1 ... axis, L2 ... center line, R1 ... communication path, R2, R3 ... main , S1 ... first stem, S10 ... insertion shaft portion, S100 ... ridge, S101 ... contact surface, S2 ... second stem, S20 ... pressing shaft portion, St ... Stopper

Claims (3)

  A valve body provided to be rotatable around a predetermined axis, wherein the valve body is formed with a communication passage penetrating in a direction orthogonal or substantially orthogonal to the predetermined axis, and a valve body housing chamber in which the valve body is housed. A housing having at least two main passages communicating with each other via a communication passage of the valve body in the valve body housing chamber, and a periphery of the communication passage of the valve body in which the main passages communicate with each other. A seat member, comprising: an annular seat member disposed in the housing corresponding to at least one of the main passages; and an annular member disposed in the housing, wherein the housing comprises the seat member and A housing portion for housing the annular member; and a supply passage for supplying fluid to the housing portion from the outside, wherein at least one of the sheet member and the annular member is a hole center direction of the main passage And a pressure receiving portion that receives pressure from the fluid supplied to the supply path, and the annular member has a contact portion that is aligned with the sheet member in the hole center direction of the main passage. The corresponding contact portion is configured to be switchable between a state in contact with the sheet member and a state in which the contact member is separated from the sheet member as the sheet member and the annular member relatively move. The valve device is characterized in that a discharge path for blowing the fluid supplied to the supply path toward the valve body is formed by a gap between the seat member and the contact portion of the annular member.   2. The valve device according to claim 1, wherein at least one of the seat member and the annular member is urged so that the seat member and the contact portion of the annular member approach each other. The valve body is rotatably constructed in the rotating around the predetermined axis in a non-contact state with respect to the sheet member, a non-through portion formed across the opening of the communication passage, communicating There is a non-penetrating portion facing the sheet member as the passage is switched from a state communicating with each main passage to a state rotated about the predetermined axis , and the non-penetrating portion faces the sheet member. In this state, one end side in the axial direction is provided as a fulcrum so that it can be tilted toward the seat member side, and the valve body tilts toward the seat member side so that the non-penetrating portion is pressed against the seat member and the main passage is formed. The valve device according to claim 1 or 2, wherein the valve device is configured to be shut off.

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