JP5123245B2 - 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 circulates. More specifically, the present invention relates to a valve device in which a valve body that is rotatable around a predetermined axis is housed in a housing.

  Conventionally, there are various types of valve devices for opening / closing and switching a flow path for circulating a flow target such as liquid, gas, powder, etc. As one of them, a ball valve is well known. is there. Such a ball valve is provided so as to be rotatable about a predetermined axis, and has a valve body formed with a communication passage that passes through a virtual plane that is orthogonal or substantially orthogonal to the predetermined axis, and the valve body is internally provided. A housing in which at least two main passages communicating with each other via a communication passage of the valve body in the valve body housing chamber are formed, and a valve body in which the main passages communicate with each other An annular sheet member disposed in the housing is provided in correspondence with each main passage so as to face the periphery of the communication passage. In the ball valve, the seat member and the valve body are always in pressure contact with each other, whereby the space between the housing and the valve body is sealed (in a liquid-tight or air-tight state).

  Further, as shown in FIG. 8, like the ball valve, it is provided so as to be rotatable around a predetermined axis L ′, and is connected through a virtual plane orthogonal to or substantially orthogonal to the predetermined axis L ′. A valve body 2 ′ in which a passage R1 ′ is formed and a valve body housing chamber 30 ′ in which the valve body 2 ′ is housed are formed, and a communication path R1 ′ of the valve body 2 ′ in the valve body housing chamber 30 ′ is formed. The housing 3 'in which at least two main passages R2' and R3 'communicating with each other via the main body R2' and the main passages R2 'and R3' are communicated with each other and is opposed to the periphery of the communication passage R1 '. As described above, as the valve device 1 ′ including the annular seat member 4 ′ disposed in the housing 3 ′ so as to correspond to at least one of the main passages R2 ′ and R3 ′, the valve body 2 ′ is a seat. Rotate a predetermined axis L ′ without contact with the member 4 ′ It is rotatable about the center, and a non-penetrating portion formed between the openings at both ends of the communication path R1 ′ is opposed to the sheet member 4 ′, with one end side in the extending direction of the axis L ′ as a fulcrum. It is provided so as to be able to tilt on the seat member 4 ′ side, and the valve body 2 ′ tilts to the seat member 4 ′ side so that the non-penetrating portion presses against the seat member 4 ′ and blocks the main passages R2 ′ and R3 ′ There is provided a non-sliding valve device configured as described above. Such a valve device 1 ′ can minimize wear of the seat member 4 ′ because the valve body 2 ′ does not contact the seat member 4 ′ when the valve body 2 ′ is rotated around the predetermined axis L ′. Therefore, it has been attracting attention because it can properly seal between the valve body 2 ′ and the housing 3 ′ over a long period of time as compared with the above-described general ball valve (see, for example, Patent Document 1).

  The valve device 1 ′ is formed with a seat member accommodating portion 300 ′ that accommodates the seat member 4 ′ so as to be movable along the center of the holes of the main passages R2 ′ and R3 ′ with respect to the housing 3 ′. In addition, there is one in which the sheet member 4 ′ is biased toward the valve body 2 ′ in the sheet member housing portion 300 ′. The valve device 1 ′ is configured to allow the pressure contact between the valve body 2 ′ and the seat member 4 ′ to be in an appropriate state by applying the biasing force of the biasing means 5 ′ to the seat member 4 ′. It is said that the sealing performance between the valve body 2 ′ and the housing 3 ′ is higher than that in which the seat member 4 ′ is fixed at a fixed position.

Japanese Patent No. 4192193

  By the way, in any of the valve devices 1 ′ configured as described above, when various distribution objects such as powders and liquids pass through the main passages R2 ′ and R3 ′ and the communication path R1 ′, the distribution object is accommodated in the sheet member. It may get into the part 300 ′. That is, in the valve device 1 ′ having the above configuration, since the seat member 4 ′ is provided so as to be movable along the center of the holes of the main passages R2 ′ and R3 ′, the seat member 4 ′ can be allowed to move. A gap is formed between “and the housing 3”, and the seat member 4 ′ is moved to the back side of the seat member 4 ′ (on the opposite side of the seat member 4 ′ from the front end side in pressure contact with the valve body 2 ′). Since a space is formed instead, when the flow object passes through the main passages R2 ′, R3 ′ and the communication passage R1 ′, it flows from the gap formed between the seat member 4 ′ and the housing 3 ′. The target object may enter the sheet member accommodating portion 300 ′.

  Then, when the distribution object is a fine powder or the like, the distribution object that has entered the sheet member housing portion 300 ′ hinders the movement of the sheet member 4 ′, and the distribution object corrodes the biasing means 5 ′. In the case of a liquid or gas that deteriorates or deteriorates, the distribution object deteriorates the function of the biasing means 5 ′. Therefore, the conventional valve device 1 ′ has a problem that the seat member 4 ′ is not properly pressed against the valve body 2 ′ and the valve body 2 ′ and the housing 3 ′ cannot be properly sealed. .

  Therefore, the present invention can reliably ensure the movement of the seat member and the function of the urging means for urging the seat member, and maintain the seal between the valve body and the housing in a good condition over a long period of time. It is an object of the present invention to provide a valve device that can be used.

The valve device according to the present invention is provided so as to be rotatable about a predetermined axis, and has a valve body formed with a communication passage penetrating through a virtual plane orthogonal or substantially orthogonal to the predetermined axis, and the valve A valve body containing chamber is formed, and a housing in which at least two main passages communicating with each other via a communication passage of the valve body in the valve body containing chamber are formed, and the main passages communicate with each other. An annular seat member disposed in the housing corresponding to at least one of the main passages so as to face the periphery of the communication passage of the valve body, and an urging means for urging the seat member toward the valve body side The housing is formed with a sheet member accommodating portion that movably accommodates the sheet member along the center of the hole of the main passage, and the urging means includes an inner surface that defines the sheet member accommodating portion, and a rear surface of the sheet member. Between Is set, in the produced valve device so as to seal between the housing and the valve body by the seat member and the valve element is pressed against passage forming member having an extending cylinder portion extending in the seat member accommodating portion A fluid inflow path is formed in the housing for allowing fluid supplied from the outside to flow into a region where the biasing means of the sheet member accommodating portion is interposed, and the biasing means of the sheet member accommodating portion is interposed The fluid discharge path for discharging the fluid that has flowed into the region to be pressed to the vicinity of the pressure contact position with respect to the valve body in the seat member is formed by a gap between the extending cylindrical portion of the passage forming member and the seat member in the seat member accommodating portion. It is characterized by being.

  According to the valve device configured as described above, the fluid inflow path through which the fluid supplied from the outside flows into the seat member accommodating portion is formed in the housing, and the fluid that has flowed into the seat member accommodating portion is disposed on the valve body accommodating chamber side and the main body. Since a fluid discharge path for discharging to at least one side of the passage side is formed, even if a circulation object enters the sheet member accommodating portion, by supplying fluid from the fluid inflow passage, The flow target is discharged from the fluid discharge path to at least one of the valve body storage chamber side and the main passage side together with the supplied fluid. Accordingly, since the flow target that inhibits the movement of the sheet member and causes deterioration and corrosion of the urging means does not exist in the sheet member accommodating portion, the function of the movement of the sheet member and the urging means is reliably ensured. Thus, the seal between the valve body and the housing can be maintained in a good state for a long time.

In the valve device having the above-described configuration, the fluid supplied from the fluid inflow passage is discharged from the fluid discharge passage in the vicinity of the pressure contact position with respect to the valve body in the seat member . It is possible to efficiently remove (clean) the distribution object attached to the biasing means.

Further, in the valve device having the above-described configuration, the flow target attached to the valve body can be removed by the fluid discharged from the fluid discharge path, and the rotation of the valve body and the contact between the valve body and the seat member can be appropriately performed. Can be maintained in a state.

In this case, the valve body is configured to be rotatable about the predetermined axis in a non-contact state with respect to the seat member, and a non-penetrating portion formed between the openings at both ends of the communication path is a seat. In a state of being opposed to the member, it is provided so as to be able to tilt toward the seat member side with one end side in the axial direction as a fulcrum, and the non-penetrating portion presses against the seat member by tilting the valve body toward the seat member side It is preferable that the main passage is configured to be blocked. 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. In addition, since this type of valve device is configured such that the valve body rotates without contact with the seat member, the flow object may intervene in a gap formed between the valve body and the seat member. However, it is possible to remove the flow target object interposed between the valve body and the seat member by discharging the fluid in the vicinity of the pressure contact position of the seat member with respect to the valve body. As a result, when the valve body is tilted, the flow object is not interposed between the valve body and the seat member, so that the closeness between the valve body and the seat member is ensured, and the valve body and the housing The seal between them can be maintained in an appropriate state.

  As described above, according to the valve device of the present invention, the movement of the seat member and the function of the urging means for urging the seat member can be reliably ensured, and the seal between the valve body and the housing can be secured. Can be maintained in a good state for a long time.

It is a longitudinal cross-sectional view of the valve apparatus which concerns on one Embodiment of this invention, Comprising: The state which the main channel | path of the housing connected via the communicating channel | path of the valve body is shown. It is a longitudinal cross-sectional view of the valve apparatus which concerns on the same embodiment, Comprising: The non-penetrating part of a valve body is closely_contact | adhered to a seat member, and the state which interrupted | blocked the main channel | path of the housing is shown. Explanatory drawing for demonstrating the relationship of the 1st stem insertion part and 1st stem (connection part) of the valve apparatus which concern on the embodiment is shown. It is a partial expanded sectional view of the valve apparatus which concerns on the same embodiment, Comprising: The A section expanded sectional view of FIG. 1 is shown. The partial expanded sectional view of the valve apparatus which concerns on other embodiment of this invention is shown. The fragmentary expanded sectional view of the valve apparatus which concerns on another embodiment of this invention is shown. The partial expanded sectional view of the valve apparatus which concerns on another embodiment of this invention is shown. The partial expanded sectional view of the conventional valve apparatus is shown.

  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 a two-way valve that is disposed on a flow path through which a flow target is circulated and switches between blocking and opening of the flow path. That is, in the valve device according to the present embodiment, two pipes constituting the flow path are connected, and the state can be switched between a state in which the flow object can flow and a state in which the flow cannot be performed between the pipes. It has become. In addition, the distribution target (distribution target) is appropriately selected according to the facility or plant in which the flow path is installed, for example, liquid such as liquid or gas that does not contain foreign matters, Powders, fluids containing foreign substances, miscellaneous crushed waste, and the like may be selected for distribution.

  As shown in FIGS. 1 and 2, the valve device according to the present embodiment includes a valve body 2 in which a communication passage R <b> 1 that passes through a virtual plane (not shown) that is orthogonal or substantially orthogonal to a predetermined axis L is formed. The valve body housing chamber 30 in which the valve body 2 is housed is formed, and two main passages R2 and R3 communicating with each other via the communication passage R1 of the valve body 2 in the valve body housing chamber 30 are formed. An annular seat member 4 disposed in the housing 3 so as to correspond to one main passage R2 so as to face the housing 3 and the periphery of the communication passage R1 of the valve body 2 in which the main passages R2 and R3 communicate with each other. And an urging means 5 for urging the seat member 4 toward the valve body 2 side.

  The valve body 2 is configured to be rotatable about the predetermined axis L in a non-contact state with respect to the seat member 4, and a non-penetrating portion formed between both end openings of the communication path R1. In a state facing the sheet member 4, the sheet member 4 is provided so as to be tiltable toward the sheet member 4 with the one end side in the axis L direction as a fulcrum.

  Then, as described above, the valve device 1 according to this embodiment rotates the valve body 2 in a non-contact state with respect to the seat member 4 and then tilts the valve body 2 toward the seat member 4 side. Accordingly, in addition to the above configuration, the valve body 2 is inserted into the housing 3 so as to pass through the predetermined axis L, and the valve body 2 is tiltably supported on one end side in the predetermined axis L direction (the lower end side of the housing 3 in this embodiment). In addition, an axial stem (hereinafter referred to as a first stem) 8 that rotates the valve body 2 around a predetermined axis L, and the housing 3 on the opposite side of the first stem 8 so as to pass through the predetermined axis L. An axial stem (which is inserted) and urges the valve body 2 toward the seat member 4 at the other end side of the predetermined axis L (the upper end side of the housing 3 in this embodiment) to tilt the valve body 2 ( (Hereinafter referred to as a second stem) 9.

  Like the general ball valve, the valve body 2 is formed in a substantially spherical shape, and the communication path R1 is formed in a straight hole passing through the approximate center of the valve body 2. The valve body 2 according to the present embodiment has a stem insertion portion (hereinafter referred to as a first stem) for inserting one end portion (a connection portion 80 to be described later) of the first stem 8 into a lower portion on one end side in a predetermined axis L direction. 20 (referred to as an insertion portion) is recessed. As shown in FIG. 3, the first stem insertion portion 20 includes a pair of first plane portions 20 a and 20 b extending along a direction orthogonal or substantially orthogonal to a predetermined axis L serving as a rotation center of the valve body 2. A pair of second plane portions that are formed across a predetermined axis L, are perpendicular to or substantially perpendicular to the pair of first plane portions 20a and 20b, and extend in a direction orthogonal to or substantially orthogonal to the predetermined axis L. 21a and 21b are formed across the predetermined axis L.

  Returning to FIGS. 1 and 2, the valve body 2 according to the present embodiment has a second stem 9, which will be described later, on an upper portion that is the other end side in the predetermined axis L direction (the side opposite to the first stem insertion portion 20). A pressed portion (hereinafter referred to as a first pressed portion) 22a that is pressed (biased) by the pressing portion 90 is provided. The first pressed portion 22 a is provided so that the pressing force by the pressing portion 90 acts toward the sheet member 4 in a state where the non-penetrating portion of the valve body 2 faces the sheet member 4. In the present embodiment, the valve body 2 has a stem insertion portion (hereinafter referred to as a second stem insertion portion) 22 into which the end portion of the second stem 9 is inserted.

  Similarly to the first stem insertion portion 20, the second stem insertion portion 22 is configured by a non-penetrating hole (concave portion), and an inner periphery (opening shape) of the second stem insertion portion 22 is set to a predetermined value. By adopting the shape, a part of the inner peripheral surface of the second stem insertion portion 22 is a first pressed portion 22a. Specifically, the second stem insertion portion 22 is defined by an inner peripheral surface provided with a first pressed portion 22a made of a plane extending in substantially the same direction as the hole center CL of the communication path R1, In the state where the non-penetrating part 2 and one main passage R2 face each other (the center of the communication passage R1 and the center line of the main passages R2 and R3 are orthogonal to each other), the first pressed portion 22a (inner surface) is The valve body 2 extends in a direction perpendicular to the direction allowing displacement (tilt), and the pressing force of the pressing portion 90 acts in a direction in which the valve body 2 is displaced.

  The valve device 1 according to the present embodiment removes the valve body 2 from a state in which the valve body 2 is displaced (tilted) toward the seat member 4 by pressing by the pressing portion 90 (a state in which the valve body 2 is in close contact with the seat member 4). The valve body 2 can be forcibly displaced to the opposite side (the valve body 2 can be separated from the seat member 4). Along with this, the inner peripheral surface that defines the second stem insertion portion 22 is another pressed portion (hereinafter referred to as a second pressed portion) made of a plane that faces the first pressed portion 22a substantially in parallel. ) 22b.

  The housing 3 has a valve body housing chamber 30 for housing the valve body 2 therein, and is formed so that two main passages (holes) R2 and R3 face each other across the valve body housing chamber 30. ing. That is, as described above, since the communication passage R1 of the valve body 2 is formed by a straight hole, the two main passages R2 and R3 are formed so as to be substantially concentric with the communication passage R1 of the valve body 2. . The two main passages R2 and 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 according to the present embodiment includes a main frame 31 and a sub frame 32 attached to the main frame 31. The valve body accommodating chamber 30 is attached to the main frame 31 in a state of being attached to the sub frame 32. Is to be formed.

  The main frame 31 includes a main body portion 310 that defines a part of the valve body housing chamber 30 that houses the valve body 2, a first stem insertion portion 311 for inserting the first stem 8, and a second stem 9. A second stem insertion portion 312 for insertion and a cylindrical pipe connection portion 313 defining the other main passage R3 are configured.

  The main body 310 has a space in which the valve body 2 can be accommodated in a non-contact state. That is, the main body portion 310 is formed with a recess having an opening (not numbered) for inserting the valve body 2 on one side surface. The opening of the main body 310 is formed in a substantially circular shape centering on a center CL perpendicular to a predetermined axis L of the valve body 2 through a substantial center of the valve body accommodating chamber 30 (concave portion). A step for fitting the annular gasket G is formed around the opening.

  The first stem insertion part 311 is provided in the lower part of the main body part 310, and has a stem insertion hole (hereinafter referred to as a first stem insertion hole) H1 penetrating substantially concentrically with a predetermined axis L of the valve body 2. Is formed. That is, the first stem insertion hole 311 communicates the inside and the outside (the recess (the valve body housing chamber 30) and the outside) of the main body 310 so as to be orthogonal to the center CL of the opening of the main body 310. H1 is drilled.

  The first stem insertion part 311 may be configured as a part of the main body part 310, but in this embodiment, another member (hereinafter referred to as a first member) 314 independent of the main body part 310 is used as the main body part 310. It is configured to be attached to. The first member 314 includes a cylindrical portion 314a and a flange portion 314b provided continuously with one end of the cylindrical portion 314a. The first member 314 has a bolt (not numbered) inserted through the flange portion 314b in a state where the cylindrical portion 314a is inserted into a through hole (not numbered) drilled in the lower portion of the main body 310. The main body 310 is fixed to the main body 310 by being screwed into a screw hole formed in the main body 310. And the 1st stem penetration hole H1 is formed by the continuous hole of the cylindrical part 314a and the flange part 314b.

  The first stem insertion hole H <b> 1 is formed by a stepped hole penetrating the inside and the outside. A cylindrical gasket G (not numbered) is fitted in the first stem insertion hole H1 (portion opened outward), and can be rotated around a predetermined axis L by the gasket G. The sealing performance with the first stem 8 is ensured.

  The gasket G of the first stem insertion portion 311 according to this embodiment is pressed in the axial direction of the first stem 8 in a state where the gasket G is fitted in the first stem insertion hole H1 and the first stem 8 is inserted. Thus, the outer peripheral surface of the first stem 8 and the inner peripheral surface of the first stem insertion hole H1 are in close contact with each other, and the sealing performance can be secured while allowing the first stem 8 to rotate. Therefore, the valve device 1 according to the present embodiment includes a gasket pressing member (hereinafter referred to as a first pressing member) 350 for pressing the gasket G of the first stem insertion part 311. The first pressing member 350 includes a cylindrical pressing portion 351 that can be inserted into a portion of the first stem insertion hole H1 that is open outwardly, and one end portion of the pressing portion 351. And a bolt (not shown) inserted through the flange 352 is screwed into a screw hole (not shown) drilled in the flange portion 314b of the first member 314. By doing so, the pressing part 351 can press the gasket G.

  The second stem insertion portion 312 is provided on the opposite side of the first stem insertion portion 311 (upper portion of the main body portion 310) with the valve body accommodating chamber 30 (main body portion 310) interposed therebetween. The second stem insertion portion 312 is provided with a stem insertion hole (hereinafter referred to as a second stem insertion hole H2) penetrating substantially concentrically with a predetermined axis L of the valve body 2. That is, the second stem insertion hole 312 communicates the inside and outside (the recess (the valve body housing chamber 30) and the outside) of the main body 310 so as to be orthogonal to the center CL of the opening of the main body 310. H2 is drilled so as to substantially face the first stem insertion hole H1. The second stem insertion part 312 may be formed as a part of the main body part 310. However, in the present embodiment, a part of the main body part 310 and another member independent of the main body part 310 (hereinafter referred to as the main body part 310). 316).

  The second member 316 includes a cylindrical portion 317 and flange portions 318 a and 318 b provided at both ends of the cylindrical portion 317, and the pair of flange portions 318 a and 318 b and the cylindrical portion 317 are continuous. These holes constitute a part of the second stem insertion hole H2. A through hole (not numbered) that constitutes a part of the second stem insertion hole H <b> 2 is formed in the upper part of the main body part 310, and the hole of the second member 316 is connected to the through hole of the main body part 310. The second member 316 is arranged so as to be concentric, and then the bolt (not numbered) inserted into one flange portion 318a of the second member 316 is screwed into the main body portion 310, whereby the second member 316 is moved to the main body. These are fixed to the portion 310, and these constitute the second stem insertion portion 312.

  The second stem insertion hole H <b> 2 is formed of a stepped hole penetrating the inside and the outside. A cylindrical gasket G is fitted into the second stem insertion hole H2 (portion opened outward), and the second stem 9 is rotatable around a predetermined axis L by the gasket G. The seal is guaranteed.

  The gasket G of the second stem insertion portion 312 according to the present embodiment is pressed in the axial direction of the second stem 9 with the second stem 9 inserted through the second stem insertion hole H2. In this way, the outer peripheral surface of the second stem 9 and the inner peripheral surface of the second stem insertion hole H2 are in close contact with each other, and the sealing performance can be secured while allowing the second stem 9 to rotate. Therefore, the valve device 1 according to the present embodiment has a gasket pressing member (hereinafter referred to as a second pressing member) 353 for pressing the gasket G in the second stem insertion portion 312, similarly to the first stem insertion portion 311. It also has.

  The second pressing member 353 includes a cylindrical pressing portion 354 that can be inserted into a portion of the second stem insertion hole H2 that is open outwardly, and one end portion of the pressing portion 354. And a bolt portion (not shown) inserted through the flange portion 355 into a screw hole (not shown) drilled in the other flange portion 318b of the second member 316. The pressing portion 354 can press the gasket G by screwing.

  The pipe connection portion 313 of the main frame 31 has one end so that the inner main passage R3 communicates with the inside of the recess of the main body portion 310, and the center CL of the main passage R3 is orthogonal to the predetermined axis L of the valve body 2. The side is connected to the main body 310. That is, the pipe connection portion 313 communicates with the main body portion 310 so that the main passage R3 is substantially orthogonal to the axis L of the first stem 8 and is substantially concentric with the center CL of the concave portion (opening) of the main body portion 310. It is installed. The pipe connection portion 313 is provided with a flange 319 for connecting a pipe to the other end side.

  The sub-frame 32 is attached to the main frame 31, and has a connecting flange 320 fixed around an opening on one side of the main body 310, and a tubular pipe that defines a part of one main passage R2. And a connection portion 321. In the valve device 1 according to this embodiment, one main passage R2 has a hole formed in the housing 3 (a hole in the pipe connection portion 321), and a hole in the cylindrical passage formation member 335 fitted in the subframe 32. Is formed by connecting.

  The connecting flange portion 320 is connected to the plate-like fixing portion 320a and one surface of the fixing portion 320a (the surface opposite to the surface facing the main frame 31), and from the fixing portion 320a side. A diameter-reducing portion 320b whose outer diameter is reduced toward the tip, and a hole (a sheet member accommodating portion 300 and a small-diameter hole 330 described later) penetrating the fixing portion 320a and the diameter-reducing portion 320b is formed. . The fixing part 320a has a plurality of through holes (not shown) corresponding to a plurality of screw holes (not shown) formed around the opening of the main body part 310, and is inserted into the through holes. The subframe 32 can be fixed to the main frame 31 by screwing the bolt into the screw hole of the main body 310.

  The connecting flange portion 320 may be fixed so as to be in close contact with one side surface of the main body portion 310, but in the present embodiment, a stopper 6 described later is sandwiched between the main frame 31 and the sub frame 32. To fix it. Therefore, the gasket G is fitted into a recess (not numbered) formed on the surface of the connecting flange portion 320 on the valve body accommodating chamber 30 side (the other surface of the fixed portion 320a). Thereby, in a state where the sub frame 32 is fixed to the main frame 31, the gasket G on the main body part 310 side is in close contact with one surface of the stopper 6, and the gasket G on the connecting flange part 320 side is in contact with the other side of the stopper 6. Close to the surface, it is possible to achieve a seal between them.

  The pipe connection portion 321 of the sub-frame 32 is connected at one end to the opening edge portion on the other surface side of the connection flange portion 320 (opening edge portion of the reduced diameter portion 320b). With the fixing portion 320a) attached to the main body portion 310, the internal main passage R2 faces the other main passage R3, and the hole center CL of the main passage R2 is orthogonal to a predetermined axis L of the valve body 2 in which it is built. It is provided to do. A flange 322 for connecting a pipe is also provided at the other end of the pipe connection part 321.

  As a result, the housing 3 has a sub-frame 32 attached to the main frame 31 so as to define a valve body accommodating chamber 30 for housing the valve body 2 therein.

  Since the valve device 1 according to the present embodiment includes the seat member 4 as described above, the housing 3 is formed with a seat member accommodating portion 300 for accommodating the seat member 4. In the valve device 1 according to the present embodiment, the housing 3 is constituted by the main frame 31 and the sub frame 32, and the seat member 4 is disposed on the one main passage R2 side. Is formed in the sub-frame 32 (connection flange portion 320).

  As shown in FIG. 4, the sheet member accommodating portion 300 is formed so as to open toward the valve element accommodating chamber 30, and the inner diameter is set larger than the outer diameter of the sheet member 4. In the valve device 1 according to the present embodiment, one main passage R2 is formed by fitting the passage forming member 335 into the subframe 32. Therefore, the connection flange portion 320 (contracted) of the subframe 32 is formed. The diameter portion 320b) is provided with a small diameter hole 330 for fitting the passage forming member 335 therein. The small-diameter hole 330 is formed so as to be continuous with the sheet member accommodating portion 300 and concentric with the hole of the pipe connecting portion 321, and has an inner diameter larger than the inner diameter of the pipe connecting portion 321 and accommodates the sheet member. The diameter is set smaller than the portion 300.

  Further, the sub-frame 32 is formed with an annular groove 331 for fitting a sealing member (O-ring in the present embodiment) S such as an O-ring or a square ring on the inner peripheral surface that defines the small-diameter hole 330. . The annular groove 331 has a depth set smaller than the cross-sectional diameter (wire diameter) of the O-ring S, and the inner peripheral side of the inserted O-ring S protrudes inward from the inner peripheral surface of the small-diameter hole 330. It is formed to become. As a result, the space between the passage forming member 335 fitted into the small diameter hole 330 and the sub frame 32 can be sealed.

  The passage forming member 335 is formed in a cylindrical shape as described above, and is formed to be continuous with the fitting cylinder portion 335a fitted into the small-diameter hole 330, and the fitting cylinder portion 335a. An extending cylinder portion 335b extending to the sheet member accommodating portion 300 in a state of being fitted into the small diameter hole 330 is provided. The fitting cylinder part 335a and the extension cylinder part 335b are set to have the same inner diameter, while the extension cylinder part 335b is set to be smaller in diameter than the fitting cylinder part 335a. In addition, the passage forming member 335 forms a gap between the inner peripheral surface of the sheet member 4 accommodated in the sheet member accommodating portion 300 and the outer peripheral surface of the extended cylindrical portion 335b, and the gap is the extended cylindrical portion. It narrows rapidly at the tip side of 335b. In other words, the passage forming member 335 is formed such that the distal end portion of the extending cylindrical portion 335b extends outward over the entire circumference.

  In the valve device 1 according to the present embodiment, a fluid inflow path 360 for allowing the fluid C supplied from the outside to flow into the seat member accommodating portion 300 is formed in the housing 3. In the valve device 1 according to the present embodiment, since the seat member accommodating portion 300 is formed in the subframe 32, the fluid inflow path 360 is also formed in the subframe 32 (the reduced diameter portion 320b). A pipe connection portion 365 for connecting a pipe for supplying the fluid C to the fluid inflow path 360 is provided on the outer surface of the housing 3 (subframe 32). The pipe connection portion 365 is formed in a cylindrical shape, and is provided so that a hole formed inside communicates with the fluid inflow channel 360.

  And in the valve apparatus 1 which concerns on this embodiment, it is formed so that the fluid inflow path 360 can discharge | release the fluid C toward the urging means 5 ... in the sheet | seat member accommodating part 300. FIG.

  As the fluid C is supplied to the seat member accommodating portion 300 as described above, the valve device 1 according to the present embodiment releases the fluid C that has flowed into the seat member accommodating portion 300 to the valve body accommodating chamber 30 side. A path 361 is formed.

  In the present embodiment, as described above, a gap is formed between the extending cylindrical portion 335b of the passage forming member 335 and the sheet member 4 in the sheet member accommodating portion 300. The fluid discharge path 361 is configured. As described above, the distance between the inner peripheral surface of the sheet member 4 (in the present embodiment, a holder 41 described later) and the outer peripheral surface of the extending cylindrical portion 335b is abruptly increased on the distal end side of the extending cylindrical portion 335b. Since it is narrow, the fluid discharge path 361 according to the present embodiment forms a slit-like nozzle that forms an annular shape around the main passage R2. That is, the fluid discharge path 361 is formed so as to discharge the fluid C in the vicinity of the annular sheet material 40 (pressure contact portion 401) that is in a contact (pressure contact) position with the valve body 2 in the sheet member 4.

  In the valve device 1 according to the present embodiment, the seat member 4 is disposed on the valve body housing chamber 30 side of the one main passage R2 and seals between the housing 3 (liquid-tight state with respect to the housing 3). (Alternatively, it is provided so as to be movable in the direction of the hole center CL of one main passage R2).

  The sheet member 4 according to the present embodiment includes an annular sheet material 40 for press-contacting the valve body 2 and an annular holder 41 configured to hold the annular sheet material 40.

  The seat member 4 is molded of a soft material that can be elastically deformed at least at a portion that is in pressure contact with the valve body 2. In the sheet member 4 according to the present embodiment, the annular sheet material 40 is molded of a soft material that can be elastically deformed in order to press the valve body 2 against the annular sheet material 40 as described above. Here, examples of materials that can be used for the annular sheet material 40 include natural rubber, synthetic rubber (synthetic rubber such as nitrile rubber, silicone rubber, acrylic rubber, styrene butadiene rubber, fluorine rubber, and ethylene propylene rubber), tetrafluoride, and the like. Although there are ethylene rubber resins and the like, it goes without saying that they are selected (in consideration of heat resistance, chemical resistance, etc.) according to the properties of the distribution object to be circulated in the flow path and the use environment of the valve device 1.

  The annular sheet material 40 is formed in a ring shape, and includes an annular holder holding portion 400 that is held by the holder 41, and a pressure contact portion 401 that is in pressure contact with the valve body 2. The holder holding portion 400 has a quadrangular cross section perpendicular to the circumferential direction of the sheet member 4, and the pressure contact portion 401 is on one surface side of the holder holding portion 400 facing the valve body housing chamber 30 side. It is formed over the entire circumference so as to follow the corner on the inner circumference side.

  The pressure contact portion 401 is formed in a semicircular cross section perpendicular to the circumferential direction of the sheet member 4, and a portion that becomes a string defining the semicircle is a holder holding portion so that the valve body 2 is pressed against the arc portion. 400 is connected. In addition, the holder holding portion 400 has a corner portion on the inner peripheral side of the other surface directed to the side opposite to the valve body accommodating chamber 30 side, the other surface, and one surface directed to the valve body accommodating chamber 30 side. Projections 402... Protrude from the outer peripheral corners over the entire circumference.

  The holder 41 according to this embodiment is set to have an outer diameter larger than the inner diameter of the main passage R2 on the assumption that the holder 41 is accommodated in the sheet member accommodating portion 300. That is, the holder 41 has an outer diameter larger than that of the main passage R <b> 2 and slightly smaller than an inner diameter of the sheet member accommodating portion 300. More specifically, the holder 41 fixes the holder main body 410 in which the annular sheet material 40 is fitted to one end portion on the valve body accommodating chamber 30 side, and the annular sheet material 40 fitted in the holder main body 410. The fixing member 420 is provided.

  Specifically, the holder main body 410 includes a cylindrical tubular fitting portion 411 into which the annular sheet material 40 is fitted, and a cylindrical fitting so as to be concentric with or substantially concentric with the cylindrical fitting portion 411. An intermediate cylindrical portion 412 formed continuously with the portion 411 and having an outer diameter larger than that of the cylindrical fitting portion 411, and an intermediate cylinder so as to be concentric with or substantially concentric with the intermediate cylindrical portion 412 The cylindrical portion 413 is formed continuously with the cylindrical portion 412 and has an outer diameter larger than that of the intermediate cylindrical portion 412 and slightly smaller than the inner diameter of the sheet member accommodating portion 300.

  The cylindrical fitting part 411, the intermediate cylindrical part 412, and the cylindrical part 413 have the same inner diameter. An O-ring or a square ring (O-ring in this embodiment) S is fitted to the intermediate cylindrical portion 412. Thereby, the O-ring S fitted to the intermediate cylindrical portion 412 is in a state where the holder main body 410 is accommodated (inserted) in the sheet member accommodating portion 300, and the inner peripheral surface of the sheet member accommodating portion 300 and the intermediate cylindrical portion 412 is slightly deformed so as to be in a pressure contact state over the entire inner peripheral surface of the sheet member accommodating portion 300.

  The fixing member 420 is formed in an annular shape. Specifically, the fixing member 420 includes an annular fixing member main body 421 that is externally fitted to the sheet member 4 (holder holding portion 400) that is externally fitted to the cylindrical fitting portion 411, and one end of the fixing member main body 421. A regulating portion 422 projecting inward from the inner periphery on the side, and a positioning portion 423 projecting radially outward from the other end surface of the fixing member main body 421. In the fixing member 420, the positioning portion 423 contacts the end face Fa of the intermediate cylindrical portion 412 in a state where the fixing member main body 421 is externally fitted to the annular sheet material 40, and the regulating portion 422 contacts the annular sheet material 40. It comes to touch. As a result, the fixing member 420 can fix the annular sheet material 40 together with the holder body 410, and the annular sheet material 40 is surrounded by the holder body 410 and the fixing member 420 except for the pressure contact portion 401, and protrudes. Only the part 402 becomes the aspect protruded to the valve body 2 side. The fixing member 420 may be fixed by fitting or screwing to the holder main body 410, but in this embodiment, the positioning portion 423 of the fixing member 420 is fixed to the holder main body 410 with screws. ing.

  The biasing means 5 includes an inner surface of the sheet member accommodating portion 300 (a surface that delimits the sheet member accommodating portion 300 and faces the valve element accommodating chamber 30 side), and a rear surface of the sheet member 4 (the valve element accommodating chamber of the holder main body 410). The surface of the sheet member 4 is urged toward the valve body accommodating chamber 30 side. Accordingly, the valve device 1 according to the present embodiment is provided with a stopper 6 that restricts the movement of the seat member 4 from the specified position toward the valve body accommodating chamber 30 (valve body 2). The specified position is the home position of the seat member 4, and the valve body 2 is properly positioned with respect to the seat member 4 (annular sheet material 40) in a state where the valve body 2 is tilted to the seat member 4 side. It means the position of the sheet member 4 that can be pressed.

  As the urging means 5, various types such as a coil spring and a disc spring can be adopted. In the present embodiment, a disc spring is adopted. The disc spring is formed in an annular shape, and is located between the back surface of the seat member 4 (holder 41) 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 passage R2. It is intervened. In the present embodiment, the three disc springs 5 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 where the sheet member 4 is located at a specified position.

  The stopper 6 is formed in an annular plate (doughnut plate) shape, and is fixed in a state where the outer peripheral end portion is sandwiched between the main frame 31 and the sub frame 32. The stopper 6 according to this embodiment is sandwiched between the main frame 31 and the sub frame 32, but is actually bolted to the connection flange portion 320 of the sub frame 32. That is, by fixing the sub frame 32 to which the stopper 6 is fixed to the main frame 31 via bolts (not numbered), the stopper 6 is sandwiched between the main frame 31 and the sub frame 32. ing.

  The inner hole defined by the stopper 6 is set to a hole diameter at which the stopper 6 does not interfere with the valve body 2. The stopper 6 has a step formed on the inner peripheral edge on the side opposite to the valve body 2 side. As a result, the holder 6 (fixing member 420) fits into the annular space formed by the step, and the stopper 6 faces the holder 41 on the surface facing the side opposite to the valve body 2 side that defines the annular space. The movement of the (sheet member 4) is regulated.

  In the present embodiment, the holder 41 (fixing member 420) is configured so that the positioning portion 423 is flush with one surface of the connecting flange portion 320 in a state where the holder 41 (fixing member 420) is located at a specified position. The fixing member main body 421 is positioned in the six annular spaces. That is, the stopper 6 has a surface opposite to the valve body storage chamber 30 side facing the positioning portion 423 of the holder 41 (sheet member 4) and protrudes radially inward on the valve body storage chamber 30 side. The portion faces the fixing member main body 421. Thereby, the seat member 4 is prevented from moving to the valve body accommodating chamber 30 side from the specified position.

  As shown in FIGS. 1 to 3, the first stem 8 is inserted into the housing 3 (first stem insertion portion 311), and the first stem insertion portion of the valve body 2 is disposed at one end located in the housing 3. 20 (between a pair of first plane portions 20a and 20b: a region surrounded by the pair of first plane portions 20a and 20b and the pair of second plane portions 21a and 21b) is formed. .

  The connecting portion 80 of the first stem 8 has a pair of protruding strips 81a, 81b extending in a direction orthogonal or substantially orthogonal to the predetermined axis L so as to face the pair of first flat portions 20a, 20b. A pair of third plane portions that are formed across a predetermined axis L, extend in a direction orthogonal to or substantially orthogonal to the direction in which the ridges 81a and 81b extend, and are parallel or substantially parallel to the predetermined axis L 82a and 82b are formed across the predetermined axis L.

  The pair of protrusions 81a and 81b are formed so as to have a slight gap with respect to the opposed first flat surfaces 20a and 20b. That is, the interval between the pair of protrusions 81a and 81b is set to be narrower than the interval between the pair of first flat surface portions 20a and 20b so that the valve body 2 can be tilted. The strips 81a and 81b are configured to be in line contact with the opposed first flat surfaces 20a and 20b.

  The third plane portions 82a and 82b are in surface contact with the second plane portions 21a and 21b on the opposite valve body 2 side, and the torque when the first stem 8 is rotated is the second plane portions 21a and 21b. It is comprised so that it can transmit to 3rd plane part 82a, 82b from, and the movement (tilting) of the valve body 2 along the contact surface is accept | permitted.

  As shown in FIGS. 1 and 2, a convex portion (not numbered) configured to make point contact with the valve body 2 is formed at the tip of the first stem 8 located in the housing 3. . The convex portion is formed such that the apex (the most protruding portion) is located on a predetermined axis L of the first stem 8 (valve element 2). In the present embodiment, the outer surface has a spherical shape. It is formed as follows. And this 1st stem 8 is provided so that the said convex part may contact the surface (plane) formed in the back part of the 1st stem insertion part 20 of the valve body 2. FIG. That is, the first stem 8 is attached so as to support the valve body 2 located above.

  The first stem 8 can be manually rotated by attaching a handle or the like, but in the present embodiment, a drive motor (not shown) such as a pulse motor that can arbitrarily set the rotation angle of the first stem 8. ) Is connected to the other end side, and is rotated around a predetermined axis L of the valve body 2 by being driven by the drive motor.

  The second stem 9 is inserted into the housing 3 (second stem insertion portion 312), and a pressing portion 90 protruding outward in the radial direction is provided on at least a part of the outer periphery of one end located in the housing 3. . The second stem 9 will be described in detail. The second stem 9 includes a stem main body 91 that is inserted into the housing 3, and the pressing portion 90 that partially protrudes from the outer periphery of the stem main body 91. It consists of

  The pressing portion 90 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 stem body 91, and the second stem 9 is in a state where the non-penetrating portion of the valve body 2 faces the seat member 4. Is rotated around a predetermined axis L, the first pressed portion 22a of the valve body 2 is contacted or pressed.

  Further, the pressing portion 90 according to the present embodiment rotates the second stem 9 in the reverse direction around the predetermined axis L with the non-penetrating portion of the valve body 2 facing the seat member 4 (the pressing portion 90 is subjected to the first cover). By rotating the pressing portion 22a in the direction opposite to the rotation direction), the second pressed portion 22b can be pressed, and the valve body tilts (displaces) toward the seat member 4 side. 2 (non-penetrating portion) can be forcibly separated from the sheet member 4.

  Similarly to the first stem 8, the second stem 9 having the above-described configuration can be manually rotated by attaching a handle or the like. However, in this embodiment, the rotation angle of the second stem 9 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 9 with a drive motor such as a pulse motor capable of arbitrarily setting the rotation angle, the pressing portion 90 (eccentric cam). The pressing force with respect to the valve body 2 is configured to be a predetermined pressing force.

  Accordingly, when the pressing portion 90 is worn and the pressing force on the valve body 2 becomes smaller than a predetermined pressing force, the pressing portion 90 (second stem 9) is made larger by increasing the rotation angle of the second stem 9. A predetermined pressing force can be applied to the valve body 2 with the existing pressing portion 90 without replacement. The rotation angle of the drive motor (second stem 9) may be set manually. For example, a torque sensor for measuring the torque of the second stem 9 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 portion 90 becomes a predetermined torque.

  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 is configured such that the two main passages R2 and R3 communicate with each other via the communication passage R1 of the valve body 2 from one main passage R2 side to the other main passage R3 side. (Or, the flow of the flow object is allowed from the other main passage R3 side to the one main passage R2 side). In this state, the two main passages R2, R3 and the communication passage R1 of the valve body 2 are concentric or substantially concentric, the valve body 2 is not in contact with the seat member 4, and the pressing portion 90 is The valve body 2 is not pressed against either the first pressed portion 22a or the second pressed portion 22b.

  And in order to interrupt | block main passage R2 from the state which permitted distribution | circulation of the distribution | circulation target object in this way, only the 1st stem 8 is rotated 90 degrees, maintaining the 2nd stem 9 as it is. If it does so, the rotational force of the 1st stem 8 will be transmitted to the 2nd plane parts 21a and 21b of the valve body 2 via the 3rd plane parts 82a and 82b, and the valve body 2 will also rotate 90 degrees.

  Thus, when rotating the valve body 2 without rotating the second stem 9, the pressing portion 90 (cam) does not press either the first pressed portion 22a or the second pressed portion 22b (valve body). 2 is maintained in a state where no biasing force is applied to tilt the valve body 2, and the valve body 2 rotates around a predetermined axis L while maintaining the non-contact state with respect to the seat member 4. The non-penetrating portion is opposed to one main passage R2 (sheet member 4) with a gap. In addition, the state in which the second flat surface portions 21a and 21b on the valve body 2 side that transmitted the torque of the first stem 8 and the third flat surface portions 82a and 82b of the first stem 8 are along the direction in which the valve body 2 is tilted. The valve body 2 is allowed to tilt even if the second flat surface portions 21a and 21b and the third flat surface portions 82a and 82b are in contact with each other. It will be in the state.

  When the second stem 9 is rotated, as shown in FIG. 2, the pressing portion 90 presses the first pressed portion 22 a (the upper side of the valve body 2) and biases the valve body 2 toward the seat member 4. However, the valve body 2 tends to tilt by the urging. At this time, the valve body 2 tilts with the tip of the first stem 8 (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 9 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 portion 90 with the first pressed portion 22a is released. On the other hand, the pressing portion 90 presses the second pressed portion 22b, and the valve body 2 is separated from the sheet member 4 (pressure contact portion 401) by the pressing action of the pressing portion 90 against the second pressed portion 22b. Tilt in the direction you want.

  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). And if the 1st stem 8 is reversely rotated without rotating the 2nd stem 9 (it rotates to the opposite side to the case where the non-penetrating part of the valve body 2 is made to oppose the sheet member 4), the valve body 2 will become a sheet 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.

  When the circulation and blocking of the flow object are repeated in this way, the flow object (particularly, powder, gas, liquid) flows from the gap formed between the sheet member 4 and the housing 3 to the sheet member housing portion. Therefore, as shown in FIG. 4, the fluid C (cleaning liquid or gas) is caused to flow into the sheet member accommodating portion 300 from the outside via the fluid inflow path 360 at an appropriate timing. Then, the powder in the sheet member accommodating portion 300 is pushed by the fluid pressure of the fluid C supplied from the outside, and is pushed out into the housing 3 through the fluid discharge path 361. In the valve device 1 according to the present embodiment, the fluid discharge path 361 is formed so as to discharge the fluid C in the vicinity of the annular sheet material 40 (pressure contact portion 401). When the fluid C is supplied through the fluid inflow passage 360 in a state of being separated from the (pressure contact portion 401), the fluid C released through the seat member accommodating portion 300 and the fluid discharge passage 361 is discharged from the valve body 2 and the seat. The flow target object (for example, the flow target object attached to the surface of the valve body 2 or the flow target object attached to the pressure contact portion 401 of the sheet member 4) interposed between the members 4 is removed.

  Accordingly, since there is no powder or the like that hinders the movement of the sheet member 4 in the sheet member accommodating portion 300, the movement of the sheet member 4 is surely secured, and the housing 3 and the valve body 2 are secured. The seal between is maintained for a long time. Further, in the case where the distribution object is such as to corrode metal, when the fluid C is supplied through the fluid inflow path 360, the urging means 5 is cleaned by the fluid C, and the urging means As a result, the seat member 4 is properly biased, and the surface pressure between the valve body 2 and the seat member 4 can be set to a pressure necessary for sealing. Also, the seal can be maintained in a good condition for a long time.

  Then, as described above, the flow object such as powder is removed between the valve body 2 and the seat member 4 by the fluid C discharged from the fluid discharge path 361, so that the valve body 2 is tilted. In addition, the valve body 2 is surely in close contact with the seat member 4 (annular sheet material 40), and this also prevents the occurrence of a sealing failure.

  As described above, according to the valve device 1 according to the present embodiment, the fluid inflow path 360 for allowing the fluid C supplied from the outside to flow into the seat member accommodating portion 300 is formed in the housing 3, and the seat member accommodating portion. Since the fluid discharge path 361 that discharges the fluid C flowing into the valve body 300 toward the valve body housing chamber 30 is formed, the fluid C supplied from the fluid inflow path 360 causes the flow target in the sheet member housing section 300 to be fluidized. It can be discharged from the discharge path 361 to the valve body storage chamber 30 side. Thereby, since the flow target (accumulation) that causes the inhibition of the movement of the sheet member 4 and the deterioration / corrosion of the biasing means 5 does not exist in the sheet member accommodating portion 300, the movement of the sheet member 4 and The function of the urging means 5 is surely ensured, and the seal between the housing 3 and the valve body 2 can be maintained for a long time.

  Further, the fluid inflow path 360 is formed so as to allow the fluid C to flow into a region where the urging means 5 of the sheet member accommodating portion is interposed. In addition to the discharge of the substance from the fluid discharge path 361 to the valve body housing chamber 30 side, the flow target attached to the urging means 5 can be efficiently removed (washed). Thereby, since the corrosion and deterioration of the disc spring as the urging means 5 can be prevented, the urging with respect to the seat member 4 can be maintained in an appropriate state, and the seal between the valve body 2 and the housing 3 is appropriate. It can be in a state.

  Further, since the fluid discharge path 361 is formed so as to discharge the fluid C in the vicinity of the pressure contact position of the seat member 4 with respect to the valve body 2, the fluid C discharged from the fluid discharge path 361 and the valve body 2. The adhered distribution object can be removed, and for example, the rotation of the valve body 2 and the contact between the valve body 2 and the seat member 4 can be maintained in an appropriate state.

  In particular, in the present embodiment, the valve body 2 is configured to be rotatable around the predetermined axis L in a non-contact state with respect to the seat member 4 and between both end openings of the communication path R1. With the non-penetrating portion formed facing the sheet member 4, the valve body 2 is tilted to the seat member 4 side with the one end side in the direction of the axis L as a fulcrum. By doing so, the non-penetrating portion is configured to be in pressure contact with the seat member 4 to block the main passage R2, and the fluid discharge path 361 discharges the fluid C in the vicinity of the pressure contact position with respect to the valve body 2 in the seat member 4. Therefore, the wear of the seat member 4 can be minimized, and the sealing state between the valve body 2 and the housing 3 can be maintained in a good state for a long time.

  In addition, the valve device 1 according to the present embodiment is configured such that the valve body 2 rotates in a non-contact manner with the seat member 4, and therefore there is a flow target between the valve body and the seat member 4 (gap). Although the intervention may occur, the flow object can be removed by the fluid C discharged from the fluid discharge path 361, so that when the valve body 2 is tilted, the flow object becomes the valve body 2 and the seat member 4. It is not caught in. Thereby, the press contact (close contact) property between the valve body 2 and the seat member 4 is ensured, and the seal between the valve body 2 and the housing 3 can be maintained in an appropriate state.

  The valve device of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In the above-described embodiment, the valve body 2 can be rotated in a non-contact manner with respect to the seat member 4, and the valve body 2 is made in a state where the non-penetrating portions formed between the openings at both ends of the communication path R1 face the main path R2. Although the non-contact type valve device to be tilted has been described, the present invention is not limited to this, and for example, the valve body 2 is always in pressure contact with the seat member 4 disposed in the housing 3, and the valve body 2 is predetermined. Of course, it may be a general ball valve (valve device) in which the valve body 2 is slidably contacted with the seat member 4 when rotated about the axis L. Also in this case, on the premise that the sheet member 4 is provided so as to be movable in the direction of the hole center CL of the main passages R2 and R3, the fluid inflow path 360 and the fluid discharge path 361 are provided, so The distribution object that has entered can be discharged to the outside, and the seat member 4 and the valve body 2 can be brought into pressure contact with each other in an appropriate state.

  In the above embodiment, the fluid discharge path 361 is formed so as to discharge the fluid C toward the valve body 2 side. However, the present invention is not limited to this. For example, the fluid C is discharged toward the main passage R2 side. The fluid discharge path 361 may be formed as described above. That is, the fluid discharge path 361 may be formed so as to discharge the fluid C to at least one of the valve body 2 (valve body housing chamber 30) side and the main passage R2 side. However, the flow object existing on the outer surface of the valve body 2 (between the valve body 2 and the seat member 4 when the valve body 2 is in contact with and away from the seat member 4 as in the above embodiment) is removed. In this case, it goes without saying that the fluid discharge path 361 is formed so as to discharge the fluid C toward at least the valve body 2.

  In the above embodiment, the fluid inflow path 360 is formed so that the fluid C can be supplied into the space (region) in which the urging means 5 is interposed in the sheet member accommodating portion 300. However, the present invention is not limited to this. For example, the fluid C with respect to another region in the sheet member accommodating portion 300 that is in fluid communication with a space (region where the biasing means 5 is interposed) serving as a movement allowance of the sheet member 4. The fluid inflow path 360 may be formed so that the gas can be supplied.

  In the above embodiment, the passage forming member 335 is fitted into the housing 3 (subframe 32), and the passage forming member 335 forms a part of the main passage R2, and the sheet member 4 and the passage in the sheet member accommodating portion 300 are formed. The fluid discharge path 361 is formed in the gap formed between the forming member 335, but is not limited to this. For example, as shown in FIG. Corresponding fitting cylinder part 335b 'is formed in housing 3 (subframe 32), main passage R2 is formed only by housing 3 (subframe 32), and between sheet member 4 and fitting cylinder part 335b' of housing 3 is formed. The fluid discharge path 361 may be formed by a gap therebetween.

  In the above-described embodiment, the passage forming member 335 is fitted into the housing 3 (subframe 32), and the fluid discharge path 361 is formed by a gap formed between the sheet member 4 and the passage forming member 335 in the sheet member accommodating portion 300. However, the present invention is not limited to this. For example, as shown in FIG. 6, instead of the passage forming member 335, a cylindrical insertion portion that is inserted into the small diameter hole 330 so as to be movable in the hole center CL direction. 415 is provided in the sheet member 4 (holder 41), and a part of the main passage R2 is formed by the hole of the sheet member 4 (holder 41), and between the outer periphery of the cylindrical insertion portion 415 and the inner periphery of the small diameter hole 330 In addition, a sealing material S such as an O-ring or a square ring is disposed on the upper surface, and a fluid discharge path 361 is formed by a gap formed between the outer periphery of the sheet member 4 and the inner periphery of the sheet member accommodating portion 300. Even There.

  In addition, the fluid discharge path 361 is limited to a structure formed by a gap formed between the sheet member 4 and a member facing the sheet member 4 (the passage forming member 335 or the fitted cylinder portion 335b ′ provided in the housing 3). For example, as shown in FIG. 7, a slit or a hole that penetrates at least one of the valve body storage chamber 30 side and the main passage R <b> 2 side and the inside of the sheet member storage portion 300 is formed in the sheet. The fluid discharge path 361 may be configured by the slits or holes provided in the holder 41 of the member 4. However, when the slits and holes are provided in the sheet member 4 in this way, since the annular slits and holes continuous over the entire circumference of the sheet member 4 cannot be formed, the slits or holes constituting the fluid discharge path 361 are not formed. It is preferable that a plurality of be provided at intervals in the circumferential direction of the sheet member 4. Further, when a plurality of slits or holes are provided as the fluid discharge path 361 in this way (particularly, the fluid C is discharged toward the outer periphery of the valve body 2 to remove the flow target attached to the outer surface of the valve body 2. In this case, for example, it is preferable to form the slits or the holes so that the opening diameters of the slits or holes increase toward the valve body side, and to discharge the discharged fluid C radially. That is, when the fluid discharge path 361 is configured by slits or holes provided at intervals in the circumferential direction, a non-penetrating portion is formed between the slits or holes, and therefore, with respect to the non-penetrating portion in the sheet member 4. Since the fluid C is less likely to hit the outer surface of the opposing valve body 2, the fluid C object attached to the outer surface of the valve body 2 can be efficiently removed by causing the fluid C to expand radially and release.

  In the above embodiment, the two-way valve in which the two main passages R2, R3 are formed is given as an example. However, the present invention is not limited to this. For example, three or more main passages around the valve body accommodating chamber 30 are provided. The branching valve device may be formed. The same applies when applied to a ball valve.

  In the above embodiment, one sheet member 4 is provided so as to correspond to one main passage R2, but the present invention is not limited to this. For example, both main passages R2, R3 (all main passages R2) The sheet member 4 may be provided so as to correspond to the passages R2, R3).

  In the above embodiment, the fluid discharge path 361 is formed so as to extend in the hole center CL direction of the main passage R2, and the fluid C is discharged from the intersecting direction with respect to the outer surface of the valve body 2. However, the present invention is not limited to this. For example, the fluid discharge path 361 may be formed so as to discharge the fluid C along the outer surface of the valve body 2. If it does in this way, the distribution object (distribution object adhering to a valve element) interposed between a valve element and sheet member 4 can be removed certainly.

  DESCRIPTION OF SYMBOLS 1 ... Valve apparatus, 2 ... Valve body, 3 ... Housing, 4 ... Seat member, 5 ... Biasing means (disc spring), 6 ... Stopper, 8 ... First stem, 9 ... Second stem, 20 ... First stem Insertion part, 21a, 21b ... 2nd plane part, 22 ... 2nd stem insertion part, 22a ... 1st pressed part, 22b ... 2nd pressed part, 30 ... Valve body accommodation chamber, 31 ... Main frame, 32 ... Sub-frame, 40 ... annular sheet material, 41 ... holder, 80 ... connecting portion, 81a, 81b ... projection strip, 81a, 81b ... each projection strip, 82a, 82b ... third flat portion, 90 ... pressing portion, 91 ... Stem body, 300 ... Sheet member housing part, 310 ... Main body part, 311 ... First stem insertion part, 312 ... Second stem insertion part, 313 ... Pipe connection part, 314 ... First member, 314a ... Cylindrical part, 314b ... Flange, 316 ... Second member, 317 Tubular part, 318a, 318b ... flange part, 319 ... flange, 320 ... connecting flange part, 320a ... fixing part, 320b ... reduced diameter part, 321 ... pipe connection part, 322 ... flange, 330 ... small diameter hole, 331 ... Annular groove, 335 ... passage forming member, 335a ... fitting cylinder part, 335b ... extending cylinder part, 350 ... first pressing member, 351 ... pressing part, 352 ... collar part, 353 ... second pressing member, 354 ... pressing part 355: collar part, 360: fluid inflow path, 361 ... fluid discharge path, 365 ... pipe connection part, 400 ... holder holding part, 401 ... pressure contact part, 402 ... protrusion, 410 ... holder body, 411 ... cylindrical fitting Wearing part, 412 ... Intermediate cylindrical part, 413 ... Cylindrical part, 415 ... Cylindrical insertion part, 420 ... Fixed member, 421 ... Fixed member main body, 422 ... Restriction part, 423 ... Positioning part, CL ... Center of hole, Fa ... Surface, G ... gasket, H1 ... first stem insertion hole, H2 ... second stem insertion hole, L ... axis, R1 ... communicating passage, R2, R3 ... main passage, S ... O-ring

Claims (2)

A valve body provided so as to be rotatable about a predetermined axis and having a communication passage penetrating through a virtual plane orthogonal or substantially orthogonal to the predetermined axis, and a valve body accommodating chamber in which the valve body is housed And a housing in which at least two main passages communicating with each other via a communication passage of the valve body in the valve body housing chamber are formed, and the periphery of the communication passage of the valve body in which the main passages communicate with each other The annular seat member disposed in the housing corresponding to at least one of the main passages, and biasing means for biasing the seat member toward the valve body, the housing includes the seat member. A sheet member accommodating portion that is movably accommodated along the center of the hole of the main passage is formed, and the urging means is interposed between an inner surface that defines the sheet member accommodating portion and the back surface of the sheet member. Member and valve There in the produced valve device so as to seal between the housing and the valve body by pressing, provided with a passage forming member having an extending cylinder portion extending in the seat member accommodating portion, the fluid supplied from the outside A fluid inflow path is formed in the housing for allowing the urging means of the sheet member accommodating portion to be interposed, and the fluid flowing into the region where the urging means of the sheet member accommodating portion is interposed A valve device characterized in that a fluid discharge path for discharging near a pressure contact position with respect to a valve body in a seat member is formed by a gap between an extending cylinder portion of a passage forming member and a seat member in a seat member accommodating portion . The valve body is configured to be rotatable about the predetermined axis in a non-contact state with respect to the seat member, and a non-penetrating portion formed between both end openings of the communication path is opposed to the seat 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, wherein the valve device is configured to be shut off.

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