JP4471987B2 - Ball valve - Google Patents

Description

  The present invention relates to a ball valve, and more specifically, a valve body configured to be rotatable about a predetermined rotation axis and having a communication hole penetrating on a virtual plane orthogonal to the rotation axis, and the valve body is internally provided. A flow passage communicating through the communication hole of the valve body, a housing in which an annular seat member is disposed around an opening on the inner side of the flow passage, and a housing passing through the rotation axis And a stem for rotating the valve body around the rotation axis, the valve body rotates in a non-contact or substantially non-contact manner with respect to the seat member, and the valve body tilts toward the seat member side. The present invention relates to a ball valve configured such that a non-penetrating portion of a valve body comes into contact with a seat member and blocks a flow passage.

  Conventionally, various valves have been provided for opening and closing a flow path through which a fluid flows and switching the flow path, and one of them is configured to be rotatable around a predetermined rotation axis. A ball-shaped valve body provided with a communication hole penetrating through a virtual plane orthogonal to the rotation axis, and at least two flow passages in which the valve body is provided and communicated with each other through the communication hole of the valve body (For example, in the case of a two-way valve, a ball valve provided with a housing formed with two upstream and downstream flow passages, and in the case of a three-way valve, three branched flow passages) is well known. is there.

  In such a ball valve, generally, an annular seat member for ensuring a sealing property with a valve body when the flow passage is blocked is disposed around an opening end on the inner side (inside the housing) of each flow passage. The valve body is configured to rotate while being in contact (sliding contact) with each seat member, but the valve body is in contact with the seat member (a state in which the valve body is in contact with the seat member). When rotating at, there is a problem that the seat member is worn and permanent sealing performance cannot be secured.

  Therefore, as shown in FIGS. 8 and 9, the valve body 500 can rotate in a non-contact or substantially non-contact state with respect to the seat member S, and the valve body 500 is removed when the flow paths A and B of the housing 510 are blocked. A configuration is provided in which the non-penetrating portion of the valve body 500 is brought into close contact with the seat member S by being tilted toward the seat member S to block the flow passages A and B. These ball valves are based on the premise that the valve body 500 is tilted when the flow passages A and B are shut off as described above. Both of them allow the valve body 500 to tilt while the torque of the stem 520 ( Rotation) can be transmitted to the valve body 500.

  More specifically, each of the above-described ball valves has a pair of pins opposed to each other with the rotation axis L therebetween such that the axis extends in a direction orthogonal or substantially orthogonal to the rotation axis L with respect to the valve body 500. Body 501 and 501 are provided, and a connecting portion 522 having a pair of support surfaces 521 and 521 formed parallel to or substantially parallel to the axis of the pin body 501 and 501 with respect to the stem 520 is provided. . That is, in these ball valves, a pair of first fulcrum regions 501 ′ and 501 ′ extending in the direction orthogonal to or substantially orthogonal to the rotation axis L are formed on the valve body 500 with the rotation axis L interposed therebetween. A pair of pin bodies 501 and 501 are provided, and a pair of second fulcrum regions 521 ′ and 521 ′ facing the stem 520 with a gap from the pair of first fulcrum regions 501 ′ and 501 ′ are the rotation axes. A pair of support surfaces 521 and 521 are formed so as to sandwich L. As a result, these ball valves rotate the stem 520 so that the torque from the support surfaces 521, 521 (second fulcrum regions 521 ′, 521 ′) to the pin bodies 501, 501 (first fulcrum regions 501 ′, 501 ′) and the valve body 500 rotates around the rotation axis L.

  Further, in order to allow tilting of the valve body 500, the distance between the pair of pin bodies 501 and 501 is set wider than the distance between the pair of support surfaces 521 and 521, and the valve body 500 faces the seat member S. The pin body 501 and the support surface 521 are in line contact with each other and tilted toward the sheet member S. That is, this type of ball valve is configured such that the first fulcrum regions 501 ′ and 501 ′ and the second fulcrum regions 521 ′ and 521 ′ are in line contact with each other to become the tilting fulcrum of the valve body 500. .

  The ball valve stem 520 shown in FIG. 8 is provided with a pressing portion 523 formed with inclined surfaces 523 ′ and 523 ′ continuous with the supporting surfaces 521 and 521 in addition to the connection portion 522. Then, after the connecting portion 522 transmits torque to the valve body 500 to rotate the valve body 500, the pressing portion 523 (inclined surface 523 ′) is moved to the valve body 500 by moving the stem 520 in the rotation axis L direction. The (pin body 501) is pressed (biased), and the biasing causes the valve body 500 to tilt toward the seat member S side. That is, the ball valve has a function as an urging means for urging the valve body 500 toward the seat member S in addition to the function of rotating the valve body 500 with respect to the stem 520. Accordingly, such a ball valve is configured so that the non-penetrating portion of the valve body 500 is brought into close contact with the seat member S by urging by the stem 520 (biasing means) and the flow passages A and B can be blocked (for example, , See Patent Document 1).

On the other hand, the ball valve shown in FIG. 9 is inserted into the housing 510 from the side opposite to the stem 520 and is configured to be rotatable about a rotation axis that is concentric with or parallel to the stem 520 and is located in the housing 510. A urging stem 550 provided with a pressing portion 551 projecting radially outward at at least a part of the outer periphery of the one end portion, and the non-penetrating portion of the valve body 500 faces the seat member S Thus, by rotating the urging stem 550 and pressing (biasing) the valve body 500 by the pressing portion 551, the valve body 500 is tilted to the seat member S side by the pressing. That is, the ball valve is provided as an urging means for urging the valve body 500 toward the seat member S, and the urging stem 550 is provided separately from the stem 520 that rotates the valve body 500. . As a result, the ball valve also urges the valve body 500 to bring the non-penetrating portion of the valve body 500 into close contact with the seat member S, thereby blocking the flow passages A and B.
US Pat. No. 3,515,371

  However, in any of the above ball valves, the distance between the pair of pin bodies 501 and 501 (first fulcrum regions 501 ′ and 501 ′) to which the torque of the stem 520 is transmitted to allow the valve body 500 to tilt is set to a pair. Since it is necessary to set wider than the support surfaces 521 and 521 (second fulcrum regions 521 ′ and 521 ′), as shown in FIG. 10, when the stem 520 is rotated, the pair of pin bodies 501 and 501 (first fulcrum) The regions 501 ′ and 501 ′) and the pair of support surfaces 521 and 521 (second fulcrum regions 521 ′ and 521 ′) come into contact with each other, and torque is only partially transmitted, and the structure is disadvantageous in terms of strength. Met.

  Therefore, in view of such a situation, the present invention is sufficient in the torque transmission portion between the valve body and the stem even if the valve body is tilted to bring the valve body into and out of contact with the seat member. It is an object to provide a ball valve capable of obtaining strength.

A ball valve according to the present invention is configured to be rotatable around a predetermined rotation axis, and includes a valve body formed with a communication hole penetrating on a virtual plane orthogonal to the rotation axis, and the valve body is internally provided. A flow passage communicating through the communication hole of the valve body is formed, and a housing in which an annular seat member is disposed around an opening on the inner side of the flow passage, and the housing is inserted through the rotation axis. A stem for rotating the valve body around the rotation axis, and an urging means configured to be able to urge the valve body toward the seat member, the valve body being in a direction orthogonal to the rotation axis A pair of extending first fulcrum areas are formed across the rotation axis, and a pair of second fulcrum areas facing the pair of first fulcrum areas with a gap are formed across the rotation axis. The valve body of the stem The first fulcrum area and the second fulcrum area are in line contact with the urging force of the urging means and tilted toward the sheet member side by the rotation of the valve. A ball valve configured such that a non-penetrating portion of a body is in close contact with a seat member and blocks a flow passage, and the valve body has a right angle or a substantially right angle with a pair of first fulcrum regions, and the rotation axis A pair of first contact regions extending in a direction orthogonal or substantially orthogonal to each other and having a linear or planar shape is formed across the rotation axis, and the stem has a right angle or a substantially right angle with the pair of second fulcrum regions. None, and a pair of second contact areas extending in a direction orthogonal or substantially orthogonal to the rotation axis is formed across the rotation axis, and the first contact area and the second contact area are in contact with each other. and, wherein the biasing means is parallel or approximately axial center and the rotational axis A biasing stem that is inserted into the housing from the side opposite to the stem so as to form a row, and is provided with a pressing portion protruding radially outward at at least a part of the outer periphery of one end located in the housing. The pressing portion is configured to be pressed toward the seat member by pressing the valve body by changing the axial direction of the urging stem or rotating around the axis. And Note that “non-contact with the seat member” means that the valve body is completely separated from the seat member, and “substantially non-contact with the seat member” means that the valve body does not contact the seat member. This means that the valve body is in contact with at least a part of the seat member without causing a slight contact to the seat member, that is, applying a surface pressure that wears the seat member (such as when the flow passage is blocked). .

  According to the ball valve having the above-described configuration, the pair of first fulcrum regions extending in the direction orthogonal to or substantially orthogonal to the rotation axis is formed on the valve body with the rotation axis interposed therebetween, and the pair of first fulcrum regions are formed on the stem. Since a pair of second fulcrum regions facing each other with a gap is formed between the one fulcrum region and the rotation axis, the valve element is tilted by the gap between the first fulcrum region and the second fulcrum region. Permissible. When the valve body tilts toward the seat member, the first fulcrum area and the second fulcrum area are in line contact. That is, when the first fulcrum region and the second fulcrum region are in line contact, the region becomes the tilting fulcrum of the valve body.

  The valve body has a pair of first contact regions that form a right or substantially right angle with the pair of first fulcrum regions and have a linear or planar shape extending in a direction orthogonal or substantially orthogonal to the rotation axis. A pair of two stems formed in a line or plane extending in a direction perpendicular to or substantially perpendicular to the rotation axis and formed perpendicular to or substantially perpendicular to the pair of second fulcrum regions. Since the second contact area is formed across the rotation axis, and the first contact area and the second contact area are in contact, there is a gap between the first fulcrum area and the second fulcrum area. Also, torque when the stem is rotated is transmitted through the first contact region and the second contact region that are in contact with each other. As a result, not only the first fulcrum region and the second fulcrum region, but also the first contact region and the second contact region do not partially contact or collide with each other, and a portion transmitting torque to the valve body is sufficient. High strength can be obtained.

Further, as described above, the pair of first contact areas form a right or substantially right angle with the first fulcrum area and have a linear or planar shape extending in a direction perpendicular or substantially perpendicular to the rotation axis, and a pair of first contact areas. A first contact region that forms a line or a plane extending in a direction perpendicular to or substantially perpendicular to the rotation axis, that is, the two contact regions form a right angle or a substantially right angle with the pair of second fulcrum regions; Since the second contact area extends in the tilting direction of the valve body, tilting of the valve body can be permitted.
Further, the biasing means is inserted into the housing from the opposite side to the stem so that the axis is parallel or substantially parallel to the rotation axis, and at least a part of the outer periphery of the one end located in the housing is in the radial direction. It consists of an urging stem provided with a pressing part protruding outward, and the pressing part presses the valve body by shifting the urging stem in the axial direction or rotating around the axial center. Therefore, the rotation and tilting of the valve body can be independently operated, and the opening / closing operation control of the flow passage can be performed in various patterns.

  As one aspect of the present invention, the valve body includes a pair of first plane portions opposed to each other with the rotation axis extending in a direction orthogonal or substantially orthogonal to the rotation axis, and the pair of first plane portions. A pair of second plane portions that form a right angle or a substantially right angle and face each other across the rotation axis are formed, and the stem is connected between the pair of first plane portions and connected to the valve body. And a pair of ridges extending in a direction orthogonal to or substantially orthogonal to the rotation axis so as to face the pair of first plane portions, the connection portion being formed across the rotation axis, A pair of third flat portions extending in a direction orthogonal to or substantially orthogonal to the direction in which the pair of ridges extend and parallel or substantially parallel to the rotation axis are formed across the rotation axis, and the pair of first fulcrum regions are A pair of first contact regions that are configured with a pair of first flat portions. Is a pair of second flat portions may be configured by a third planar portion the pair of second contact area of the pair a pair of second pivot region is constituted by the outer surface of the pair of convex portions. If it does in this way, the above-mentioned operation and effect can be produced, without making a valve element and a stem complicated.

  The stem is inserted into the lower portion of the housing, and a convex portion is formed on at least one of the tip of the stem and the valve body so that the tip of the housing and the valve body make point contact on the rotation axis. Also good. In this way, the valve body is supported by being in point contact with the stem, and the valve body can be positioned with respect to the housing while allowing the valve body to rotate and tilt. That is, by supporting the valve body on the stem, the valve body is positioned in the vertical direction with respect to the housing, and the communication state between the flow path of the housing and the communication hole of the valve body, the seat member in the housing and the valve body The contact state with the non-penetrating part can always be the same.

  In this case, it is preferable that the convex portion is formed so that the outer surface is spherical. In this way, the valve body and the stem can always be in point contact with each other, that is, with a simple configuration, that is, the valve body can be positioned while allowing the valve body to tilt.

  As described above, according to the ball valve of the present invention, even if the valve body is tilted in order to move the valve body toward and away from the seat member, the torque transmission part between the valve body and the stem Can provide an excellent effect that a sufficient strength can be obtained.

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

  The ball valve according to the present embodiment is a two-way valve that connects two pipes (not shown) and switches between fluid flow and shut-off between the pipes. As shown in FIGS. 1 and 2, the ball valve is configured to be rotatable around a predetermined rotation axis L, and has a valve body 10 having a communication hole 100 penetrating on a virtual plane orthogonal to the rotation axis L. The valve body 10 is internally provided, flow passages A and B communicating with the valve body 10 via the communication hole 100 are formed, and an annular seat member S is formed around the opening on the inner side of the communication hole 100. A housing 20 that is disposed, a stem (hereinafter referred to as a first stem) 30 that is inserted through the housing 20 so as to pass through the rotation axis L, and that rotates the valve body 10 around the rotation axis L; And a biasing means 40 configured to be biased toward the sheet member S.

  The valve body 10 according to the present embodiment is formed in a substantially spherical shape like a general ball valve, and the communication hole 100 is formed in a straight hole passing through the approximate center of the valve body 10. The valve body 10 according to the present embodiment is provided with a stem insertion portion (hereinafter referred to as a first stem insertion portion) 110 for inserting one end portion (a connection portion 300 described later) of the first stem 30 in the lower portion. . As shown in FIGS. 3A to 3C, the first stem insertion portion 110 has a pair of first fulcrum regions extending in a direction orthogonal or substantially orthogonal to the rotation axis L serving as the rotation center of the valve body 10. 110a ′ and 110a ′ are formed with the rotation axis L interposed therebetween, and are perpendicular to or substantially perpendicular to the pair of first fulcrum regions 110a ′ and 110a ′, and are orthogonal to or substantially orthogonal to the rotation axis L. A pair of first contact regions 110b ′ and 110b ′ having a linear or planar shape extending is formed with the rotation axis L in between.

  More specifically, the valve body 10 according to the present embodiment is formed in a square hole shape in which the first stem insertion portion 110 is in a non-penetrating state, and the inner peripheral surface thereof is orthogonal or substantially perpendicular to the rotation axis L. A pair of first plane portions 110a and 110a facing each other across the rotation axis L so as to extend in a direction orthogonal to each other and a right angle or a substantially right angle with the pair of first plane portions 110a and 110a, the rotation axis L is A pair of second flat surface portions 110b and 110b facing each other are formed. Thereby, in this embodiment, while a pair of 1st fulcrum area | region 110a ', 110a' is comprised by a pair of 1st plane part 110a, 110a, a pair of 1st contact area | region 110b ', 110b' is a pair of 1st. It is composed of two planar portions 110b and 110b.

  Returning to FIG. 1 and FIG. 2, the valve body 10 according to the present embodiment is pressed (biased) by a pressing portion 400, which will be described later, of the biasing means 40 on the side (upper side) opposite to the first stem insertion portion 110. A pressed part (hereinafter referred to as a first pressed part) 120 is provided. The first pressed portion 120 is provided so that the pressing force by the pressing portion 400 acts toward the sheet member S in a state where the non-penetrating portion of the valve body 10 faces the sheet member S. In the present embodiment, the valve body 10 has a stem insertion portion (hereinafter referred to as a second stem insertion) into which an end portion of a later-described urging stem (hereinafter referred to as a second stem) 40 as the urging means 40 is inserted in the upper portion. 130).

  Similarly to the first stem insertion portion 110, the second stem insertion portion 130 is also configured by a non-penetrating hole (concave portion), and the inner circumference (opening shape) of the second stem insertion portion 130 is set to a predetermined shape. By adopting the shape, a part of the inner peripheral surface of the second stem insertion portion 130 is the first pressed portion 120. Specifically, the second stem insertion portion 130 is defined by an inner peripheral surface including a first pressed portion 120 formed of a plane extending in substantially the same direction as the hole center of the communication hole 100. The first pressed portion 120 (inner surface) is a valve in a state where the non-penetrating portion of the first and second flow passages A face each other (the center of the communication hole 100 and the center line of the flow passages A and B are orthogonal). The displacement (tilt) of the body 10 is in a direction perpendicular to the allowable direction, and the pressing force of the pressing portion 400 acts in a direction in which the valve body 10 is displaced.

  In the present embodiment, the valve body 10 is forcibly displaced to the opposite side from the state in which the valve body 10 is displaced to the seat member S side by pressing by the pressing portion 400 (the state in which the valve body 10 is in close contact with the sheet member S). In order to cause the valve body 10 to be separated from the seat member S, the inner peripheral surface that defines the second stem insertion portion 130 is another plane that is substantially parallel to and faces the first pressed portion 120. A pressed portion (hereinafter referred to as a second pressed portion) 121 is also provided.

  The housing 20 has a valve body housing space 200 in which the valve body 10 is housed, and the two flow passages A and B (holes) face each other with the valve body housing space 200 interposed therebetween. Is formed. That is, as described above, since the communication hole 100 of the valve body 10 is formed by a straight hole, two ends of the communication hole 100 and the openings on the inner side of the flow passages A and B can be opposed to each other. Two flow passages A and B are formed concentrically.

  The housing 20 according to the present embodiment includes a main frame 210 and a sub frame 250 attached to the main frame 210. The valve body accommodating space 200 is attached to the main frame 210 in a state where the sub frame 250 is attached to the main frame 210. Is to be formed.

  The main frame 210 includes a main body portion 211 that defines a part of the valve body housing space 200 in which the valve body 10 is housed, and a stem insertion portion for inserting the first stem 30 (hereinafter referred to as a first stem insertion portion). 212, a stem insertion portion (hereinafter referred to as a second stem insertion portion) 213 for inserting the urging means (second stem) 40, and a cylindrical pipe connection portion 214 defining the other flow passage B. It is configured.

  The main body 211 has a substantially hemispherical space in which the valve body 10 can be accommodated in a non-contact manner. That is, the main body portion 211 is formed with a mortar-shaped concave portion so as to form an opening (hereinafter referred to as a fitting inlet) 215 for inserting the valve body 10 and attaching the subframe 250 to one side surface. The fitting inlet 215 passes through the approximate center of the valve body accommodating space 200 (concave) and is formed in a substantially circular shape centering on a center line orthogonal to the rotation axis L of the valve body 10, and the opening edge of the fitting inlet 215 Is formed with a step (not numbered) for fitting the annular gasket G.

  The first stem insertion portion 212 is connected to the lower portion of the main body portion 211, and has a stem insertion hole (hereinafter referred to as a first stem insertion hole) 216 that penetrates substantially concentrically with the rotation axis L of the valve body 10. Is provided. That is, the first stem insertion part 212 communicates the inside and the outside (the recess (the valve body accommodating space 200) and the outside) of the main body part 211 so as to be orthogonal to the center line of the fitting inlet 215 of the main body part 211. An insertion hole 216 is formed.

  The first stem insertion hole 216 includes a stepped hole that penetrates the inside and the outside. A cylindrical gasket G is fitted into the inner peripheral surface (large diameter portion) outside the first stem insertion hole 216, and is rotatable around the rotation axis L by the gasket G. The sealing performance with the stem 30 is ensured.

  The gasket G of the first stem insertion portion 212 according to this embodiment is fitted in the first stem insertion hole 216 and pressed in the direction of the rotation axis L of the first stem 30 in a state where the first stem 30 is inserted. As a result, the outer peripheral surface of the first stem 30 and the inner peripheral surface of the first stem insertion hole 216 are brought into close contact with each other, and the sealing performance can be secured while allowing the first stem 30 to rotate. Therefore, the ball valve 1 according to the present embodiment includes a gasket pressing member (hereinafter referred to as a first pressing member) 217 for pressing the gasket G of the first stem insertion portion 212. The first pressing member 217 has a cylindrical pressing portion 217a that can be inserted into the large-diameter hole of the first stem insertion hole 216 and the one end of the pressing portion 217a. And a pressing portion 217a can press the gasket G by screwing a bolt (not numbered) inserted through the flange portion 217b into the main body portion 211 side. .

  In addition, in this embodiment, since the 1st press member 217 of the said structure is employ | adopted, the 1st press member 217 by which the press part 217a was inserted in the 1st stem insertion hole 216 in the 1st stem insertion part 212 was. A flange portion 218a facing the flange portion 217b is provided, and a bolt (not shown) inserted through the flange portion 217b is screwed into a screw hole (not shown) provided in the flange portion 218a. The pressing member 217 can be fixed.

  The second stem insertion part 213 is connected to the main body part 211, and is provided on the opposite side of the first stem insertion part 212 (upper part of the main body part 211) across the main body part 211. The second stem insertion portion 213 is provided with a stem insertion hole (hereinafter referred to as a second stem insertion hole) 219 that penetrates substantially concentrically with the rotation axis L of the valve body 10. That is, the second stem insertion part 213 communicates the inside and outside (the recess (the valve body accommodating space 200) and the outside) of the main body part 211 so as to be orthogonal to the center line of the fitting inlet 215 of the main body part 211. The insertion hole 219 is drilled so as to substantially face the first stem insertion hole 216.

  The second stem insertion hole 219 is formed of a stepped hole penetrating the inside and the outside. A cylindrical gasket G is fitted in the inner peripheral surface (large diameter portion) outside the second stem insertion hole 219, and the second gasket is rotatable around the rotation axis L by the gasket G. The sealing performance with the stem 40 is ensured.

  The gasket G of the second stem insertion portion 213 according to the present embodiment is fitted in the second stem insertion hole 219 and pressed in the direction of the rotation axis L of the second stem 40 in a state where the second stem 40 is inserted. As a result, the outer peripheral surface of the second stem 40 and the inner peripheral surface of the second stem insertion hole 219 are brought into close contact with each other, and the sealing performance can be secured while allowing the second stem 40 to rotate. Therefore, in the ball valve 1 according to the present embodiment, a gasket pressing member (hereinafter referred to as a second pressing member) 220 for pressing the gasket G is used as the second stem insertion portion 213 in the same manner as the first stem insertion portion 212. It also has.

  The second pressing member 220 includes a cylindrical pressing portion 220a that can be inserted into the large-diameter hole of the second stem insertion hole 219 and the one end of the pressing portion 220a. A flange 220b extending in the direction is provided, and a screw (not shown) inserted through the flange 220b is screwed into the main body 211 so that the pressing portion 220a can press the gasket G.

  In this embodiment, since the second pressing member 220 similar to the first stem insertion portion 212 is adopted, the pressing portion 217a is inserted into the second stem insertion hole 219 in the second stem insertion portion 213. A flange portion 218b facing the flange portion 220b of the second pressing member 220 is provided, and a bolt (not shown) inserted through the flange portion 220b is screwed into a screw hole (not shown) provided in the flange portion 218b. By doing so, the second pressing member 220 can be fixed.

  The pipe connection portion 214 of the main frame 210 has one end side so that the internal flow passage B communicates with the inside of the concave portion of the main body portion 211, and the center line of the flow passage B is orthogonal to the rotation axis L of the valve body 10. The main body 211 is connected. That is, the pipe connection portion 214 has the main body portion 211 such that the flow passage B is substantially orthogonal to the rotation axis L of the first stem 30 and is substantially concentric with the center of the concave portion (insertion opening 215) of the main body portion 211. It is connected to. The pipe connection portion 214 is provided with a flange 221 for connecting a pipe to the other end side.

  The sub-frame 250 is attached to the main frame 210 and includes a closing portion 251 that closes the fitting inlet 215 of the main body portion 211 and a cylindrical pipe connection portion 252 that defines one flow passage A.

  The closing part 251 is opposed to the outer peripheral edge of the fitting inlet 215 of the main body part 211, protrudes from one surface of the annular part 251 a that contacts the gasket G, and is fitted into the fitting inlet 215. And an annular protrusion 251b. The annular portion 251a defines an opening extending the flow passage A defined by the pipe connecting portion 252 and a hole (not shown) through which a bolt (not shown) is inserted into a region facing the opening edge of the main body portion 211. Is drilled. As a result, the annular portion 251a is in close contact with the gasket G of the main body portion 211 (opening edge portion of the fitting inlet 215) by screwing the inserted bolt into a screw hole (not shown) provided on the outer periphery of the fitting inlet 215. In addition, the sealing property between the sub frame 250 and the main frame 210 (main body portion 211) can be secured.

  The annular protrusion 251b is guided to the inner peripheral surface in a state of being fitted into the fitting inlet 215 of the main body 211, and the subframe 250 (substantially, the sheet member S and the other flow passage B). ) Can be positioned with respect to the main frame 210.

  The sub-frame 250 is formed with an annular step at the opening edge of one surface located on the concave portion (insertion opening 215) side of the main body 211, and the annular sheet member S is fitted into the step. It is. Accordingly, the sheet member S is arranged around the opening end of the flow passage A located on the inner side of the housing 20 in a state where the sub frame 250 is attached to the main frame 210. The pipe connection portion 252 of the sub-frame 250 is connected at one end to the opening edge portion on the other surface side of the annular portion 251a, and the internal flow passage is in a state where the closing portion 251 is attached to the main body portion 211. A is provided so as to face the other flow passage B, and the center line of the flow passage A is orthogonal to the rotation axis L of the valve body 10 provided therein. Note that a flange 253 for connecting a pipe is also provided at the other end of the pipe connecting part 252.

  Accordingly, the housing 20 is configured to define a valve body accommodating space 200 for housing the valve body 10 therein by attaching the sub frame 250 to the main frame 210.

  As described above, the first stem 30 is inserted into the housing 20 (first stem insertion portion 212), and the first stem insertion portion 110 of the valve body 10 (a pair of first stems) is inserted into one end portion located in the housing 20. Between one plane part 110a, 110a: The connection part 300 inserted in a pair of 1st plane part 110a, 110a and the area | region enclosed by a pair of 2nd plane part 110b, 110b) is formed.

  As shown in FIGS. 3A to 3C, the connecting portion 300 of the first stem 30 has a pair of second fulcrum regions 300a facing the pair of first fulcrum regions 110a ′ and 110a ′ with a gap. ', 300a' is formed with the rotation axis L in between, and forms a right angle or a substantially right angle with the pair of second fulcrum regions 300a ', 300a' and extends in a direction perpendicular to or substantially orthogonal to the rotation axis L. A pair of second contact regions 300b ′ and 300b ′ having a linear shape or a planar shape is formed with the rotation axis L interposed therebetween.

  More specifically, the connection portion 300 has a pair of ridge portions 300a and 300a extending in a direction orthogonal or substantially orthogonal to the rotation axis L so as to face the pair of first plane portions 110a and 110a. A pair of third plane portions 300b that are formed across the rotation axis L, extend in a direction orthogonal or substantially orthogonal to the direction in which the pair of ridges 300a and 300a extend, and are parallel or substantially parallel to the rotation axis L. 300b is formed with the rotation axis L in between. Accordingly, in the ball valve 1 according to the present embodiment, the pair of second fulcrum regions 300a ′ and 300a ′ is configured by the outer surfaces (projected surfaces) of the pair of protruding portions 300a and 300a and the pair of second contacts. The regions 300b ′ and 300b ′ are composed of a pair of third plane portions 300b and 300b.

  The pair of ridge portions 300a, 300a are formed so as to have a gap with respect to the opposed first flat portions 110a, 110a. That is, the interval between the pair of protruding strips 300a, 300a is set to be narrower than the interval between the pair of first flat portions 110a, 110a so that the valve body 10 can tilt, and each protrusion when the valve body 10 tilts. The strips 300a and 300a are in line contact with the opposing first flat surface portions 110a and 110a, and the line contact portions are configured to be tilting fulcrums. That is, in a state where the non-penetrating portion of the valve body 10 is opposed to the sheet member S (one flow passage A), the contact portion between the one ridge portion 300a, 300a and the second flat portion 110b, 110b becomes a fulcrum. Thus, the valve body 10 is tilted so as to be able to contact and separate from the sheet member S.

  The third plane portions 300b and 300b are in surface contact with the second plane portions 110b and 110b on the opposite valve body 10 side, and the torque when the first stem 30 is rotated is the second plane portions 110b and 110b. It is comprised so that transmission to the 3rd plane part 300b, 300b can be permitted, and the movement (tilting) of the valve body 10 along the contact surface is accept | permitted.

  A convex portion 310 configured to make point contact with the valve body 10 is formed at the tip of the first stem 30 located in the housing 20. The convex portion 310 is formed such that the apex (the most protruding portion) is located on the rotation axis L of the first stem 30 (valve element 10). In the present embodiment, the outer surface has a spherical shape. It is formed as follows. The first stem 30 is provided such that the convex portion 310 is in contact with a surface (plane) formed at the back of the first stem insertion portion 110 of the valve body 10. That is, the first stem 30 is attached so as to support the valve body 10 located above.

  The first stem 30 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 30). (Not shown) is connected to the other end side, and is rotated around the rotation axis L of the valve body 10 by being driven by the drive motor.

  Returning to FIG. 1 and FIG. 2, the biasing means 40 according to the present embodiment is inserted into the housing 20 (second stem insertion portion 213), and is attached to at least a part of the outer periphery of one end located in the housing 20. The second stem (biasing stem) provided with the pressing portion 400 protruding outward in the radial direction is employed. As with the first stem 30, the second stem 40 can be manually rotated by attaching a handle or the like. However, in this embodiment, the rotation angle of the second stem 40 is arbitrarily set. A drive motor (not shown) such as a pulse motor that can be connected to the other end.

  The second stem 40 will be described in detail. The second stem 40 includes a stem body 401 that is inserted into the housing 20 and the pressing portion 400 that partially protrudes from the outer periphery of the stem body 401. It consists of and. The pressing portion 400 is a so-called cam. When the second stem 40 is rotated around the rotation axis L in a state where the non-penetrating portion of the valve body 10 faces the seat member S, the first pressed portion of the valve body 10 is pressed. The part 120 is contacted or pressed. Further, the pressing portion 400 according to the present embodiment rotates the second stem 40 counterclockwise around the rotation axis L in a state where the non-penetrating portion of the valve body 10 faces the seat member S (the first pressed portion is pressed against the pressing portion 400). By rotating the portion 120 in a direction opposite to the rotation direction), the valve body 10 tilted (displaced) toward the seat member S side. The (non-penetrating portion) can be forcibly separated from the sheet member S.

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

  First, when the two flow passages A and B communicate with each other through the communication hole 100 of the valve body 10, fluid flow is allowed. In this state, the two flow passages A and B and the communication hole 100 of the valve body 10 are concentric or substantially concentric, and the valve body 10 is in a non-contact or substantially non-contact state with respect to the seat member S. The pressing part 400 is in a state of not pressing the first pressed part 120 and the second pressed part 121 of the valve body 10. Note that “the valve body 10 is not in contact with the seat member S” means that the valve body 10 is completely separated from the seat member S, and “the valve body 10 is substantially out of the seat member S”. “Non-contact” means that the valve body 10 is slightly in contact with the seat member S, that is, without applying a surface pressure that wears the seat member S (such as when the flow passages A and B are blocked). It means that the valve body 10 is in contact with at least a part of the sheet member S.

  Then, in order to block the flow paths A and B from the state in which the fluid flow is allowed in this way, only the first stem 30 is rotated by 90 ° while the second stem 40 is maintained as it is. If it does so, the rotational force of the 1st stem 30 will be transmitted to the 2nd plane part 110b, 110b of the valve body 10 via the 3rd plane part 300b, 300b, and the valve body 10 will also rotate 90 degrees. At this time, the second flat surface portions 110b and 110b and the third flat surface portions 300b and 300b are kept in surface contact with each other, and even if the torque of the first stem 30 acts, the first stem 30 (the ridge portions 300a, 300a, the third flat surface portions 300b, 300b) and the valve body 10 (first flat surface portions 110a, 110a, second flat surface portions 110b, 110b) from the first stem 30 without being in contact with each other (partially contacting). Torque is transmitted to the valve body 10.

  Thus, when rotating the valve body 10 without rotating the second stem 40, the pressing part 400 (cam) does not press either the first pressed part 120 or the second pressed part 121 (valve element). The valve body 10 is rotated around a predetermined rotation axis L while maintaining the sheet member S in a non-contact or substantially non-contact state with respect to the sheet member S. The non-penetrating part of the valve body 10 is opposed to the one flow passage A (the sheet member S) with a gap or a slight contact. Further, the state in which the second flat surface portions 110b and 110b on the valve body 10 side that transmitted the torque of the first stem 30 and the third flat surface portions 300b and 300b of the first stem 30 are along the direction in which the valve body 10 is tilted. Even if the second flat surface portions 110b and 110b and the third flat surface portions 300b and 300b are in contact with each other, the valve body 10 is tilted. It becomes an allowed state.

  And if the 2nd stem 40 is rotated, the press part 400 will press the 1st to-be-pressed part 120 (upper part side of the valve body 10), and will urge the valve body 10 to the sheet | seat member S side, The valve body 10 tries to tilt. At this time, the lower part of the valve body 10 (the connection part 300 of the first stem 30 and the first stem insertion part 110 of the valve body 10) are in line contact in the direction orthogonal to the rotation axis L, and the line contact part is The valve body 10 tilts as a fulcrum. That is, in the ball valve 1 according to the present embodiment, the pair of protruding strip portions 300a and 300a formed on the first stem 30 and the pair of first flat portions 110a and 110a formed on the valve body 10 have a gap. Therefore, the movement (tilting) of the valve body 10 is allowed, and since these are line contact in a direction perpendicular to the rotation axis L and the hole centers of the flow paths A and B, the valve body 10 is tilted with the contact portion as a fulcrum. Become. Then, the non-penetrating portion of the valve body 10 is in close contact (pressure contact) with the sheet member S acting on the surface pressure, one of the flow passages A (between the two flow passages A and B) is shut off, and the fluid is circulated. Will stop.

  In order to switch from this state to the state in which fluid is circulated, the second pressed portion 40 is rotated in the reverse direction (rotated to the opposite side to the case where the valve body 10 is displaced to the seat member S side). While the contact of the pressing part 400 with respect to 120 is released, the pressing part 400 presses the second pressed part 121. Then, as a result of the valve body 10 tilting in the direction away from the sheet member S by the pressing action of the second pressing portion 400 against the second pressed portion 121, the valve body 10 is not in contact with the sheet member S or substantially. It will return to a non-contact state. And if the 1st stem 30 is reversely rotated without rotating the 2nd stem 40 (when the non-penetrating part of the valve body 10 is made to oppose the sheet member S), the valve body 10 will be a sheet member. It rotates in a non-contact or substantially non-contact state with respect to S, and the two flow passages A and B communicate with each other through the communication hole 100 of the valve body 10 to return to a state in which fluid flow is permitted.

  As described above, the ball valve 1 according to the present embodiment forms a right angle or a substantially right angle with the pair of first fulcrum regions 110a ′ and 110a ′ and a right angle or a substantially right angle with the rotation axis L. A pair of first contact regions 110 b ′ and 110 b ′ having a linear or planar shape extending in the direction is formed across the rotation axis L, and the pair of second fulcrum regions 300 a ′ and 300 a ′ are formed on the first stem 30. A pair of second contact regions 300b 'and 300b' that are perpendicular or substantially perpendicular to the rotation axis L and extend in a direction orthogonal or substantially orthogonal to the rotation axis L are formed across the rotation axis L. Since the first contact regions 110b ′ and 110b ′ are in contact with the second contact regions 300b ′ and 300b ′, the first fulcrum regions 110a ′ and 110a ′ and the second fulcrum regions 300a ′ and 300a are contacted. Torque when the first stem 30 is rotated is transmitted in the area where the first contact areas 110b ′ and 110b ′ and the second contact areas 300b ′ and 300b ′ are in contact with each other. In addition to the first fulcrum areas 110a ′ and 110a ′ and the second fulcrum areas 300a ′ and 300a ′, the first contact areas 110b ′ and 110b ′ and the second contact flow areas 300b ′ and 300b ′ partially contact or collide. Therefore, a sufficient strength can be obtained at a portion where torque is transmitted to the valve body 10.

  In addition, the pair of first contact regions 110b ′ and 110b ′ form a right or substantially right angle with the first fulcrum regions 110a ′ and 110a ′ and have a planar shape extending in a direction perpendicular or substantially perpendicular to the rotation axis L. The pair of second contact regions 300b ′ and 300b ′ has a planar shape that forms a right angle or a substantially right angle with the pair of second fulcrum regions 300a ′ and 300a ′ and extends in a direction perpendicular or substantially perpendicular to the rotation axis L. None, because the first contact regions 110b ′ and 110b ′ and the second contact regions 300b ′ and 300b ′ that are in contact with each other in a state in which the valve body 10 is tilted are formed to extend in the tilting direction of the valve body 10. The tilting of the valve body 10 is not hindered.

  In particular, in the present embodiment, the pair of first fulcrum regions 110a ′ and 110a ′ is composed of a pair of first flat portions 110a and 110a, and the pair of first contact regions 110b ′ and 110b ′ is a pair of second. The pair of second fulcrum regions 300a ′ and 300a ′ are configured by the outer surfaces of the pair of protruding strips 300a and 300a, and the pair of second contact regions 300b ′ and 300b ′ are the pair. Therefore, the above operation and effect can be achieved without making the valve body 10 and the first stem 30 complicated structures.

  The first stem 30 is inserted into the lower portion of the housing 20, and a convex portion 310 is formed at the tip of the first stem 30 so that the tip of the housing 20 and the valve body 10 are in point contact on the rotation axis L. Therefore, the valve body 10 is supported in point contact with the first stem 30, and the valve body 10 is supported with respect to the housing 20 while allowing the valve body 10 to rotate and tilt. Can be positioned. That is, by supporting the valve body 10 on the first stem 30, the valve body 10 is positioned in the vertical direction with respect to the housing 20, and the communication between the flow passages A and B of the housing 20 and the communication hole 100 of the valve body 10 is established. The state and the contact state between the seat member S in the housing 20 and the non-penetrating portion of the valve body 10 can always be the same. And since the outer surface of the said convex part 310 is formed in spherical shape, it can be in the state which always made the point contact of the valve body 10 and the stem, although it is a simple structure.

  Further, the urging means 40 is inserted into the housing 20 from the side opposite to the first stem 30 so that its axis is parallel or substantially parallel to the rotation axis L, and the outer periphery of one end portion located in the housing 20. The second stem 40 is provided with a pressing portion 400 projecting radially outward in at least a part of the second stem 40. By rotating the second stem 40 around the axis, the pressing portion 400 causes the valve body 10 to move. Since it is configured to be pressed and biased toward the seat member S, the rotation and tilting of the valve body 10 can be independently operated, and the opening / closing operation control of the flow passages A and B in various patterns. It can be performed.

  The ball valve 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 embodiment, a pair of second plane portions 110b and 110b is formed on the valve body 10, and a pair of third plane portions that are brought into contact with the second plane portions 110b and 110b on the connection portion 300 of the first stem 30 are used. Although the torque of the first stem 30 can be transmitted to the valve body 10 by forming 300b and 300b, the present invention is not limited to this. For example, FIGS. 4 (a) and 4 (b) As shown in FIG. 1, a pair of protruding ridges 110b and 300b extending in a direction orthogonal or substantially orthogonal to the rotation axis L is formed on either the valve body 10 or the first stem 30 with the rotation axis L interposed therebetween. A pair of flat portions 110b and 300b that extend in a direction orthogonal or substantially orthogonal to the rotation axis L with respect to the other and are in contact with the ridges 110b and 300b are formed with the rotation axis L in between. It may be. Further, as shown in FIG. 4C, a pair of ridges 110b and 300b extending in a direction orthogonal or substantially orthogonal to the rotation axis L with the rotation axis L interposed between the valve body 10 and the first stem 30 are provided. It may be formed and the protrusions 110b and 300b are brought into contact with each other. Further, as shown in FIG. 4D, a pair of pin bodies P and P (110b, 110b) extending in a direction orthogonal to or substantially orthogonal to the rotation axis L with respect to the valve element 10 is sandwiched between the rotation axis L. And a pair of flat surface portions 300b and 300b that extend in a direction orthogonal or substantially orthogonal to the rotation axis L to the connection portion 300 of the first stem 30 and contact the pin bodies P and P are provided with the rotation axis L. It may be formed by sandwiching.

  That is, the valve body 10 forms a pair of first or second fulcrum regions 110a ′ and 110a ′ that are perpendicular or substantially perpendicular to each other and that extend in a direction orthogonal or substantially orthogonal to the rotation axis L. One contact region 110b ′, 110b ′ is formed across the rotation axis L, and the first stem 30 is perpendicular or substantially perpendicular to the pair of second fulcrum regions 300a ′, 300a ′, and the rotation axis L A pair of second contact regions 300b ′, 300b ′ extending in a direction perpendicular to or substantially perpendicular to each other is formed across the rotation axis L, and the first contact regions 110b ′, 110b ′ and the first contact regions 110b ′, 110b ′ When the two contact regions 300b ′ and 300b ′ are brought into contact with each other, the tilting of the valve body 10 can be allowed, and when the torque of the first stem 30 is transmitted, the valve body 10 and the first stem 30 are G Not per transfer sites piece of click can transmit torque in the first contact region 110b ', 110b' and a second contact region 300b ', 300b' contact area throughout the. Thereby, even if the valve body 10 is tilted to bring the valve body 10 into and out of contact with the seat member S, a sufficient strength is provided at the torque transmission portion between the valve body 10 and the first stem 30. Obtainable.

  Moreover, in the said embodiment, while forming a pair of convex part 300a, 300a in the 1st stem 30, and forming the 1st plane part 110a, 110a facing the convex part 300a, 300a in the valve body 10, When the body 10 is tilted, the first fulcrum regions 110a ′ and 110a ′ and the second fulcrum region 300a where the ridges 300a and 300a and the first flat surfaces 110a and 110a are in line contact with the rotation axis L in the orthogonal direction. However, the present invention is not limited to this. For example, as shown in FIG. 5A, the shaft center extends in a direction perpendicular to the rotation axis L with respect to the valve body 10. As described above, a pair of pin bodies P, P (110a, 110a) opposed to each other with the rotation axis L interposed therebetween are provided as a pair of first support regions 110a ′, 110a ′ and the connection of the first stem 30 A pair of flat surface portions 300a, 300a corresponding to the pin bodies P, P (110a, 110a) are formed as a pair of second support regions 300a ′, 300a ′ in 300, and when the valve body 10 tilts, the pin body P , P (110a, 110a) and the plane portions 300a, 300a may be configured to be in line contact with each other.

  Further, as shown in FIG. 5 (b), contrary to the above-described embodiment, a pair of protruding ridges extending in a direction orthogonal or substantially orthogonal to the rotation axis L with respect to the valve body 10 are paired with a pair of first fulcrum regions. 110a 'and 110a' are formed so as to face each other across the rotation axis L, and the pair of second ridges 110a 'and 110a' are opposed to the connection portion 300 of the first stem 30 with a gap therebetween. A pair of flat portions are formed as the fulcrum regions 300a ′ and 300a ′, and when the valve body 10 is tilted, the convex strip portions 110a ′ and 110a ′ on the valve body 10 side and the flat portion 300a ′ on the first stem 30 side, It may be configured such that 300a ′ is in line contact. That is, a pair of first fulcrum regions 110a ′ and 110a ′ extending in a direction orthogonal or substantially orthogonal to the rotation axis L is formed on the valve body 10 with the rotation axis L interposed therebetween, and the first stem 30 has A pair of second fulcrum regions 300a ′ and 300a ′ that are opposed to the pair of first fulcrum regions 110a ′ and 110a ′ with a gap therebetween are formed with the rotation axis L therebetween, and the valve body 10 is formed with a first stem. Rotating 30 rotates in a non-contact or substantially non-contact state with respect to the sheet member S, and the urging means 40 urges the first fulcrum regions 110a ′ and 110a ′ and the second fulcrum regions 300a ′ and 300a ′. Can be brought into line contact and tilted toward the sheet member S, various aspects can be employed. However, if the pin bodies P, P are provided as described above, the assembly work becomes complicated. Therefore, it goes without saying that it is preferable to provide the above-described protruding portions 300a, 300a instead of the pin bodies P, P.

  In the above embodiment, the valve body 10 is biased toward the seat member S by rotating the second stem 40 around the rotation axis L. For example, FIG. 6 (a) and FIG. 6 (b). As shown, the second stem 40 is configured to be movable in the direction of the rotation axis L, and the second stem 40 is moved to the end of the housing 20 of the second stem 40 in the direction of the rotation axis L. The inclined surface 410,410 (pressing part 400) which can press the 1st to-be-pressed part 120 of the body 10 may be formed.

  In the above embodiment, the stem (first stem) 30 for rotating the valve body 10 is provided through the lower portion of the housing 20. However, the present invention is not limited to this. Of course, it may be inserted through the top. That is, the configuration may be reversed from the above embodiment. However, in this case, since the second stem 40 side is located below the valve body 10, the valve body 10 may be supported by the second stem 40. Therefore, in this case, it is only necessary to provide the second stem 40 with a convex portion that supports the valve element 10 without providing the convex portion 310 with the first stem 30. And if the outer surface of this convex part is formed in spherical shape, even if the valve body 10 is pressed and changed by the pressing part 400, it can be maintained in the state of being in point contact with the second stem 40 and being supported. .

  In the above embodiment, the first stem 30 for rotating the valve body 10 and the second stem 40 for urging the valve body 10 are provided separately, but the present invention is not limited to this. For example, a ball valve as shown in FIG. 8 described in the related art may be used. That is, the valve body 500 is provided with a pair of pin bodies 501 and 501 that are opposed to each other with the rotation axis L extending in a direction orthogonal to or substantially orthogonal to the rotation axis L that is the rotation center of the valve body 10. A connecting portion 522 formed with a pair of support surfaces 521 and 521 which are parallel to or substantially parallel to the axis of the pin bodies 501 and 501 with respect to the stem 520, and continuous with respect to the support surfaces 521 and 521. And the pressing portion 523 formed with the inclined surfaces 523 ′ and 523 ′, and the connecting portion 523 transmits torque to the valve body 500 to rotate the valve body 500, and then the stem 520 is moved in the direction of the rotation axis L. The pressing portion 523 presses (biases) the valve body 500 by moving the valve body 500, and the pressing causes the valve body 500 to tilt toward the seat member S so that the non-penetrating portion of the valve body 500 is brought into close contact with the seat member S. Bo It may be a Rubarubu.

  In this case, a line or a surface that forms a right angle or a substantially right angle with the pair of second fulcrum regions 521 ′ and 521 ′ with respect to the connection portion 522 of the stem 520 and extends in a direction orthogonal to or substantially orthogonal to the rotation axis L. A pair of second contact areas having a shape are formed across the rotation axis L, and the valve body 500 forms a right angle or a substantially right angle with the pair of first fulcrum areas 501 ′, 501 ′, and the rotation axis L If a pair of first contact regions having a linear or planar shape extending in a direction orthogonal or substantially orthogonal are formed across the rotation axis L, and the first contact region and the second contact region are in contact with each other, When the torque of the stem 520 is transmitted while allowing the tilting of the valve body 500, the torque can be transmitted in the entire region of the first contact region and the second contact region without causing a single contact. However, in this case, since the valve body 500 is configured to be tilted by being pressed by a pressing portion 523 (inclined surfaces 523 ′ and 523 ′) continuous to the connection portion 522, the pair of second contact regions is Needless to say, it is formed continuously from the connecting portion 522 to the pressing portion 523.

  Further, as a modification of the ball valve (ball valve for displacing the stem in the rotation axis direction) shown in FIG. 8, the connecting portion 300 and the urging means 40 may be configured integrally. For example, as shown in FIGS. 7A and 7B, a pair of second fulcrum regions 300a ′ and 300a ′ extend in a direction orthogonal to or substantially orthogonal to the rotation axis L and are on the valve body 10 side. The inclined surface inclined to the rotation axis L side is formed in the connection portion 300 of the stem 30 and extends in a direction orthogonal to the rotation axis L as a pair of first fulcrum regions 110a ′ and 110a ′. When the stem 30 is moved in the extending direction of the rotation axis L, the inclined surface 300a ′ presses the ridge 110 and tilts the valve body 10 when the stem 30 is moved in the direction in which the rotation axis L extends. It may be.

  In this case as well, as shown in FIG. 7C, the pair of first fulcrum regions 110a ′ and 110a ′ form a right angle or a substantially right angle and extend in a direction perpendicular to or substantially perpendicular to the rotation axis L. A pair of first contact regions 110b ′ and 110b ′ having a shape or a plane shape is formed with the rotation axis L in between, and the stem 30 is perpendicular to the pair of second fulcrum regions 300a ′ and 300a ′, A pair of second contact regions 300b ′ and 300b ′ having a linear or planar shape extending in a direction orthogonal to the rotation axis L is formed with the rotation axis L in between, and the first contact regions 110b ′ and 110b. If 'is brought into contact with the second contact regions 300b' and 300b ', the torque of the stem 30 can be transmitted to the valve body 10 and the tilting of the valve body 10 can be allowed, as in the above embodiment. it can. However, when the connecting portion 300 and the urging means 40 are integrated as described above, the valve body 10 is connected to only one stem 30, so that the side opposite to the stem 30 side is provided. Thus, for example, the valve body 10 and the housing 20 are partially engaged with each other so that the valve body 10 is tiltably supported.

  In the above-described embodiment, the first stem 30 is provided with the convex portion 310 whose outer surface has a spherical shape at the end portion, and the valve body 10 is supported by the convex portion 310, but is not limited thereto. In order to support the valve body 10 as in the above embodiment, for example, a convex portion protruding toward the first stem 30 side is provided on the inner surface of the second stem insertion portion 130 of the valve body 10, and the convex portion 310 is provided. Is made to contact the end surface of the first stem 30 to support the valve body 10, or convex portions are provided on both the back surface of the second stem insertion portion 130 and the end surface of the first stem 30. You may make it support the valve body 10 by making convex parts contact | abut. Even in this case, the valve body 10 can be supported in a state where the valve body 10 is in point contact with the first stem 30. The convex portion 310 is not limited to a spherical outer surface. For example, the convex portion 310 can be variously modified such as a conical shape or a polygonal pyramid shape. However, it is needless to say that the convex portion 310 preferably has a spherical outer surface in consideration of the tilting of the valve body 10.

  Although the two-way valve has been described in the above embodiment, the present invention is not limited to this. For example, three flow passages are formed in the housing 20 around the rotation axis L at intervals of 90 °, and A communication hole bent at a substantially right angle communicating with two of the three flow passages and a non-penetrating portion facing the remaining flow passages are formed, and the communication hole is formed by rotating the valve body 10 forward and backward by 90 °. It may be a three-way valve in which the flow path communicating through the is switched. In this case as well, the tilting direction of the valve body 10 is constant, and the valve bodies 10 only need to tilt toward the center of the hole of the flow passages (opposing flow passages) formed at intervals of 180 °. If the regions 110b ′, 110b ′ and the second contact regions 300b ′, 300b ′ are formed along the tilting direction of the valve body 10, the torque of the first stem 30 can be increased with these while allowing the valve body 10 to tilt. It can be transmitted in the same manner as in the embodiment.

  In the above embodiment, the valve body 10 is supported by the end portion (convex portion 310) of the first stem 30. However, the present invention is not limited to this. For example, the first stem 30 is formed in a stepped rod shape. Of course, the valve body 10 may be supported by the large diameter portion with the small diameter side being the housing 20 side.

  In the above embodiment, the first stem 30 is inserted through the lower side of the housing 20, but the present invention is not limited to this. For example, the arrangement of the first stem 30 and the second stem 40 is upside down. May be. In this case, the valve body 10 is preferably supported by the second stem 40.

It is a longitudinal cross-sectional view of the ball valve which concerns on one Embodiment of this invention, Comprising: The state which the flow path of the housing connected via the communicating hole of the valve body is shown. It is a longitudinal cross-sectional view of the ball valve 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 flow path of the housing is shown. It is the elements on larger scale of the ball valve concerning the embodiment, (a) is II expanded sectional view of Drawing 1 which showed the housing part by a virtual line, and (b) is II- of (a). II expanded sectional drawing, (c) shows the III-III expanded sectional view of (a). It is the elements on larger scale of the connection part of the valve body of the ball valve concerning the other embodiment of the present invention, and the 1st stem, and (a) is while forming the plane part as the 1st contact field in the valve body. The partial expanded sectional view of the ball valve which formed the protruding item | line as a 2nd contact area | region in the 1st stem, (b) is forming the protruding item | line as the 1st contact area | region in a valve body, and making a 2nd contact with a 1st stem The partial expanded sectional view of the ball valve which formed the plane part as a field, (c) forms the ridge as a 2nd contact area in the 1st stem while forming the ridge as the 1st contact field in the valve element (D) is a partially enlarged sectional view of a ball valve in which a pin body as a first contact region is provided on the valve body and a flat portion as a second contact region is formed on the first stem. Indicates. It is the elements on larger scale of the energizing means (connection part of a valve body and a 2nd stem) of a ball valve concerning another embodiment of the present invention, and (a) is as a 1st fulcrum area | region to a valve body. A partially enlarged cross-sectional view of a ball valve in which a pin body is provided and a flat portion as a second fulcrum region is formed on the first stem, FIG. The partial expanded sectional view of the ball valve which formed the plane part as the 2nd fulcrum area in the stem is shown. It is a partial expanded sectional view of the urging means (connection part of a valve body and a 2nd stem) of the ball valve concerning another embodiment of the present invention, and (a) rotates the valve body around the axis of rotation. (B) shows the partial expanded sectional view of the state which pressed the valve body (to-be-pressed part), and made the non-penetrating part of the valve body closely_contact | adhered to the sheet | seat member . It is the elements on larger scale of a ball valve concerning another embodiment of the present invention (ball valve provided with a stem which united a connection part and urging means), and (a) shows the 2nd fulcrum field. A schematic partial enlarged view of a ball valve constituted by an inclined surface and having a first fulcrum region constituted by a ridge, (b) is a state diagram when the valve body is tilted, and (c) is IV- of (a). IV sectional drawing is shown. The longitudinal cross-sectional view of the conventional ball valve is shown. The longitudinal cross-sectional view of another conventional ball valve is shown. 8 and 9 are a partial cross-sectional view and a partially enlarged view for explaining the relationship between the stem and the valve body (first fulcrum region and second fulcrum region) when rotating the valve body of the ball valve shown in FIGS. Indicates.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ball valve, 10 ... Valve body, 20 ... Housing, 30 ... 1st stem, 40 ... Energizing means (2nd stem), 100 ... Communication hole, 110 ... 1st stem insertion part, 110a ... 1st plane part 110a ′ ... first fulcrum region, 110b ... second flat portion, 110b '... first contact region, 120 ... pressed portion (first pressed portion), 121 ... pressed portion (second pressed portion), DESCRIPTION OF SYMBOLS 130 ... 2nd stem insertion part, 200 ... Valve body accommodation space, 210 ... Main frame, 211 ... Main body part, 212 ... 1st stem insertion part, 213 ... 2nd stem insertion part, 214 ... Pipe connection part, 215 ... Insertion 216 ... first stem insertion hole, 217 ... first pressing member, 217a ... pressing portion, 217b ... flange portion, 218 ... flange portion, 219 ... second stem insertion hole, 220 ... second pressing member, 220a ... pressing Part, 220b ... buttocks part, 22 ... Flange, 250 ... Subframe, 251 ... Blocking part, 251a ... Annular part, 251b ... Annular projection, 252 ... Pipe connection part, 253 ... Flange, 300 ... Connection part, 300a ... Round part, 300a '... Second Fulcrum area, 300b ... third plane part, 300b '... second contact area, 310 ... convex part, 400 ... pressing part, 401 ... stem body, A, B ... flow passage, G ... gasket, L ... rotation axis, S ... Sheet material

Claims (4)

A valve body configured to be rotatable around a predetermined rotation axis and having a communication hole formed through a virtual plane perpendicular to the rotation axis, the valve body is internally provided, and the valve body is connected via the communication hole of the valve body. A communication passage is formed, and a housing in which an annular seat member is disposed around an opening on the inner side of the flow passage, and the valve body is inserted around the rotation axis so as to pass through the rotation axis. A pair of first fulcrum regions extending in a direction perpendicular to the rotation axis is provided on the valve body, and a biasing means configured to be able to bias the valve body toward the seat member. A pair of second fulcrum regions that are formed across the rotation axis and that are opposed to the pair of first fulcrum regions with a gap are formed across the rotation axis. Is not connected to the sheet member Alternatively, the first fulcrum region and the second fulcrum region are in line contact with each other by the urging force of the urging means and tilted toward the seat member, and the non-penetrating portion of the valve body is moved to the seat member. In the ball valve configured to block the flow path closely, the valve body is perpendicular or substantially perpendicular to the pair of first fulcrum regions and extends in a direction orthogonal or substantially orthogonal to the rotation axis. A pair of first contact regions having a linear or planar shape is formed with the rotation axis interposed therebetween, and the stem forms a right angle or a substantially right angle with the pair of second fulcrum regions and is orthogonal to the rotation axis. A pair of second contact regions having a linear or planar shape extending in a substantially orthogonal direction is formed across the rotation axis, the first contact region and the second contact region are in contact with each other , and the urging means has a shaft The stem so that the center is parallel or substantially parallel to the axis of rotation; The urging stem is configured by an urging stem that is inserted into the housing from the opposite side and is provided with a pressing portion projecting radially outward at at least a part of the outer periphery of the one end located in the housing. The ball valve is configured such that the pressing portion presses the valve body and urges it toward the seat member side by shifting in the axial direction or rotating around the axial center .   The valve body has a pair of first plane portions facing each other across the rotation axis so as to extend in a direction orthogonal or substantially orthogonal to the rotation axis, and a right angle or a substantially right angle with the pair of first plane portions, A pair of second flat portions facing each other with the rotation axis interposed therebetween is formed, and the stem includes a connecting portion that is inserted between the pair of first flat portions and connected to the valve body, and the connecting portion includes A pair of protruding ridges extending in a direction orthogonal to or substantially orthogonal to the rotation axis so as to face the pair of first plane portions are formed across the rotation axis, and the pair of ridges extend. A pair of third plane portions extending in a direction perpendicular to or substantially perpendicular to the direction and parallel or substantially parallel to the rotation axis is formed with the rotation axis interposed therebetween, and the pair of first fulcrum regions are the pair of first plane portions. And a pair of first contact areas is composed of a pair of second flat portions. Is, ball valve according to claim 1, wherein the pair of second pivot region is constituted by a third planar portion the pair of second contact area of the pair while being constituted by the outer surface of the pair of convex portions.   The stem is inserted into a lower portion of the housing, and a convex portion is formed on at least one of the distal end of the stem and the valve body so that the distal end in the housing and the valve body make point contact on the rotation axis. Item 3. The ball valve according to Item 1 or 2.   The ball valve according to any one of claims 1 to 3, wherein the convex portion is formed so that an outer surface has a spherical shape.

Images