JP6955952B2 - Ball valve - Google Patents

Description

The present invention relates to, for example, a ball valve for gas inflow provided in a smart meter of a gas supply company.

Conventionally, a ball valve has been used to open and close the flow path of a gas such as a gas or a liquid such as water (hereinafter referred to as a fluid). Such ball valves include, for example, a valve body, a ball valve body rotatably provided inside the valve body, first and second valve seats that come into contact with the outer peripheral surface of the ball valve body, and a ball valve. It is configured to include a driving mechanism that applies a rotational driving force to the body (see, for example, Patent Documents 1 and 2).

JP-A-2007-205485 Japanese Unexamined Patent Publication No. 2011-202707

The conventional ball valve has a large number of parts, and its configuration has become complicated and large. Therefore, the ball valve has been conventionally required to be simplified and downsized. However, when the ball valve is miniaturized, the clearance between the valve body and the ball valve body becomes small, and it becomes difficult to assemble the ball valve body to the valve body. As described above, the conventional ball valve is required to have a simple structure that suppresses complication and enlargement, and a structure that can improve the assembling property.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a ball valve having a simple structure and capable of improving assembling property.

In order to achieve the above object, the ball valve according to the present invention has a tubular valve body provided with a first through hole having openings on one side and the other, and a ball valve body around the rotation axis with respect to the valve body. The ball valve body is provided with a ball valve body that is rotatably supported and is provided with a second through hole having an upper opening and a lower opening that can communicate with the first through hole of the valve body. Is provided with a shaft portion rotatably supported around the rotation axis and an output shaft mounting portion on the opposite side of the valve body to which the output shaft of the motor is mounted. The outer peripheral surface of the ball valve body is a first surface extending along a surface inclined with respect to the rotation axis between the output shaft mounting portion and the lower opening in the rotation axis direction. It is characterized in that an inclined surface is provided.

In the ball valve according to one aspect of the present invention, the shaft portion is a second inclined surface formed of protrusions and extending on the outer surface along the surface inclined toward the first inclined surface side with respect to the rotating axis. Is provided.

In the ball valve according to one aspect of the present invention, the normal of the first inclined surface and the normal of the second inclined surface extend on one surface.

In the ball valve according to one aspect of the present invention, the outer surface of the ball valve body has the lower opening and the lower opening between the first inclined surface and the second inclined surface in the direction of the rotation axis. A recess for inserting a jig for assembling the ball valve body to the valve body is provided between the ball valve body and the second inclined surface.

In the ball valve according to one aspect of the present invention, the one opening of the valve body is provided with a notch for inserting a jig for assembling the ball valve body to the valve body.

In the ball valve according to one aspect of the present invention, a cover member attached to the inner surface of the valve body forming the other opening and provided with a third through hole communicating with the first through hole. A sealing member for sealing the gap between the ball valve body and the cover member is further provided, and the first inclined surface does not come into contact with the sealing member when the ball valve body rotates. It is provided in the range.

In the ball valve according to one aspect of the present invention, the ball valve body further includes a rotation restricting portion that regulates the rotation of the ball valve body at a position where the ball valve body closes the first through hole of the valve body. The motion control portion has a convex portion provided on the inner surface of the valve body and a concave portion provided on the outer surface of the ball valve body, and the first inclined surface overlaps the concave portion. It is provided as follows.

In the ball valve according to one aspect of the present invention, the concave portion of the ball valve body is an arcuate concave groove formed around the output shaft mounting portion, and the convex portion of the valve body is a convex portion. On the inner surface of the valve body, it is a protruding portion provided between an output shaft insertion hole through which the output shaft of the motor is inserted and one of the openings.

According to the ball valve according to the present invention, the structure is simple and the assembling property can be improved.

It is a perspective view which shows schematic appearance structure of the ball valve which concerns on embodiment of this invention. It is sectional drawing which shows typically the state which the flow path of the ball valve which concerns on embodiment of this invention is communicated. It is sectional drawing which shows typically the state which the flow path of the ball valve which concerns on embodiment of this invention is closed. It is a perspective view which shows schematic appearance structure of the valve body of the ball valve which concerns on embodiment of this invention. It is a perspective view which saw the valve body of the ball valve shown in FIG. 4 from another direction. It is sectional drawing of the valve body of the ball valve shown in FIG. It is a top view of the valve body of the ball valve shown in FIG. It is a perspective view which shows schematic appearance structure of the ball valve body of the ball valve which concerns on embodiment of this invention. It is a side view of the ball valve body of the ball valve shown in FIG. It is a perspective view which looked at the ball valve body of the ball valve shown in FIG. 8 from another direction. It is a partially enlarged view which shows roughly the structure of the rotation regulation part of the ball valve which concerns on embodiment of this invention. It is a partially enlarged view which shows roughly the structure of the 1st inclined surface of the ball valve which concerns on embodiment of this invention. It is a figure for demonstrating the method of attaching the ball valve body to the valve body in the ball valve which concerns on embodiment of this invention. It is a figure for demonstrating the method of attaching the ball valve body to the valve body in the ball valve which concerns on embodiment of this invention. It is sectional drawing which shows the modification of the ball valve which concerns on embodiment of this invention in the state which the flow path of a ball valve is closed. It is a side view of the ball valve body in the modification of the ball valve which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing an external configuration of a ball valve 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing a state in which the flow path 2 of the ball valve 1 is communicated, and FIG. 3 is a cross-sectional view schematically showing a state in which the flow path 2 of the ball valve 1 is closed. be. Hereinafter, for convenience of explanation, the direction of arrow ab in FIG. 1 is the flow direction of the fluid, the direction of arrow a is the upper side, and the direction of arrow b is the lower side. Further, the arrow cd direction (in FIG. 2, the direction perpendicular to the paper surface) is the width direction, the arrow c direction is the front side, and the arrow d direction is the back side. Further, the arrow ef direction is the rotation axis X1 direction, the arrow e direction is the left side, and the arrow f direction is the right side.

As shown in FIGS. 1 to 3, the ball valve 1 according to the embodiment of the present invention has a tubular shape provided with a valve body through hole 10h as a first through hole having openings 11 and 12 on one side and the other. The valve body 10 has an upper opening 31a and a lower opening 31b that are rotatably supported around the rotation axis X1 with respect to the valve body 10 and can communicate with the valve body through hole 10h of the valve body 10. A ball valve body 30 provided with a ball valve body through hole 31 as a second through hole is provided. The ball valve body 30 has a shaft portion 35 rotatably supported by the valve body 10 around the rotation axis X1 and a motor output shaft 41 as an output shaft of the motor 40 on the opposite side of the shaft portion 35. An output shaft fitting recess 42 is provided as an output shaft mounting portion to be mounted. The outer peripheral surface of the ball valve body 30 is a surface extending along a surface inclined with respect to the rotation axis X1 between the output shaft fitting recess 42 and the lower opening 31b in the direction of the rotation axis X1. 1 Inclined surface 80 is provided. Hereinafter, the configuration of the ball valve 1 will be specifically described.

As shown in FIG. 1, the ball valve 1 includes a valve body 10, a cover member 20, and a ball valve body 30. The ball valve 1 has a structure in which a motor 40 for rotating the ball valve body 30 is integrally attached. Further, as shown in FIGS. 2 and 3, the ball valve 1 has a seal member 50 that seals a gap between the ball valve body 30 and the cover member 20, and a rotation that regulates the rotation of the ball valve body 30. It is equipped with a regulation unit 70. Further, the first inclined surface 80 is provided at the same or substantially the same position so as to overlap the rotation restricting portion 70.

FIG. 4 is a perspective view schematically showing the external configuration of the valve body 10 of the ball valve 1 according to the embodiment of the present invention, and FIG. 5 shows another valve body 10 of the ball valve 1 shown in FIG. It is a perspective view seen from a direction. FIG. 6 is a cross-sectional view of the valve body 10 of the ball valve 1 shown in FIG. 4, and FIG. 7 is a top view of the valve body 10 of the ball valve 1 shown in FIG. As shown in FIGS. 1 to 7, the valve body 10 is formed in a cylindrical shape or a substantially cylindrical shape as a whole. The outer shape of the valve body 10 is not particularly limited as long as the inner surface is cylindrical. The valve body 10 is not particularly limited, but to disclose an example, it is made of, for example, a resin or the like. However, the present invention is not limited to this, and it may be made of metal or the like. Further, as shown in FIGS. 1, 4, 5, and 7, the valve body 10 is larger than the outer width of the valve body 10 on the upper side (arrow a direction) of the outer surface thereof, and is in the width direction from the outer surface of the valve body 10. A ball valve side connecting portion 17 projecting in the direction of (arrow cd direction) is provided. The valve body 10 is connected to the motor 40 via the ball valve side connecting portion 17.

As shown in FIGS. 1 to 7, a valve body through hole 10h penetrating between the upper end surface 10a and the lower end surface 10b of the valve body 10 is provided in the flow direction (arrow ab direction) of the valve body 10. It has two lower openings 11 and an upper opening 12 that form a valve body through hole 10h. The lower opening 11 provided on the lower side (direction of arrow b) is formed in a circular shape or a substantially circular shape. Further, the upper opening 12 provided on the upper side (direction of arrow a) is formed in a circular shape or a substantially circular shape having a diameter larger than that of the lower opening 11. The lower opening 11 is an inflow port for a fluid (for example, gas). The upper opening 12 is an outlet for the fluid flowing from the lower opening 11 to the cover member 20. In the valve body 10, an inner peripheral curved surface 14a composed of a concave spherical curved surface whose inner diameter gradually expands from the lower opening 11 toward the upper opening 12 and an upper end (in the direction of arrow a) of the inner peripheral curved surface 14a. It has a valve chamber 14 formed by an annular inner peripheral surface 14b extending linearly upward (in the direction of arrow a) with the same inner diameter from the portion. The valve chamber 14 is a space for rotatably supporting the ball valve body 30 in a state of accommodating the ball valve body 30.

The inner peripheral surface 14b forming the valve chamber 14 in the valve body 10 is provided with an output shaft insertion hole 15 formed of a through hole for inserting the motor output shaft 41, which is the output shaft of the motor 40, into the inside of the valve chamber 14. ing. Further, the inner peripheral surface 14b is a concave portion having a predetermined depth of a bottomed cylindrical shape or a bottomed substantially cylindrical shape at a portion facing the output shaft insertion hole 15 in the rotation axis X1 direction (arrow ef direction). The shaft support hole 16 is provided. The output shaft insertion hole 15 and the shaft support hole 16 are coaxially arranged, and the rotation axis X1 is the central axis. The inner peripheral curved surface 14a forming the valve chamber 14 in the valve body 10 faces the ball valve body 30 with a slight gap (clearance) in the vicinity of the output shaft insertion hole 15. Therefore, a convex portion 18 which is a protrusion portion having a triangular shape in a side view is integrally formed at a position below the output shaft insertion hole 15 (in the direction of arrow b). Further, a notch 83 is provided in one opening (lower opening) 11 of the valve body 10. The configuration of the convex portion 18 will be described in detail in the rotation restricting portion 70 described later. Further, the configuration of the notch portion 83 will also be described later.

As shown in FIGS. 1 to 3, the cover member 20 is formed in a cylindrical shape or a substantially cylindrical shape as a whole. The material of the cover member 20 is not particularly limited, but to disclose an example, for example, resin or the like. However, the present invention is not limited to this, and may be a metal or the like. The cover member 20 is provided with the cover member through hole 20h along the flow direction (arrow ab direction), that is, the direction perpendicular to the rotation axis X1 direction (arrow ef direction), and forms the cover member through hole 20h2. It has two lower openings 21 and an upper opening 22.

The lower opening 21 provided on the lower side (direction of arrow b) is formed in a circular shape or a substantially circular shape, and is an inflow port for the fluid flowing in from the upper opening 12 of the valve body 10. The lower opening 21 is formed to have a diameter substantially the same as the diameter of the lower opening 11 of the valve body 10. The upper opening 22 is formed in a circular shape or a substantially circular shape having a diameter slightly larger than that of the lower opening 21, and is an outlet for the fluid flowing in from the lower opening 21 to a pipe (not shown). .. However, the present invention is not limited to this, and the inner diameters of the lower opening 21 and the upper opening 12 may be the same, or the lower opening 21 has a larger inner diameter than the upper opening 12. You may have. The cover member 20 is fitted so as to be partially inserted into the valve body through hole 10h from the upper opening 12 of the valve body 10, and the outer peripheral wall 20a of the cover member 20 is brought into contact with the inner peripheral surface 14b of the valve body 10. It is fixed in the state of being fixed. In this fixed state, the valve body through hole 10h of the valve body 10 and the cover member through hole 20h of the cover member 20 communicate with each other to form the fluid flow path 2 in the ball valve 1.

FIG. 8 is a perspective view schematically showing the external configuration of the ball valve body 30 of the ball valve 1 according to the embodiment of the present invention, and FIG. 9 is a perspective view of the ball valve body 30 of the ball valve 1 shown in FIG. It is a side view. FIG. 10 is a perspective view of the ball valve body 30 of the ball valve 1 shown in FIG. 8 as viewed from another direction. As shown in FIGS. 1 to 3 and 8 to 10, the ball valve body 30 is formed in a spherical shape or a substantially spherical shape as a whole. The material of the ball valve body 30 is not particularly limited, but to disclose an example, for example, resin or the like. However, the present invention is not limited to this, and may be a metal or the like. The ball valve body 30 has a ball valve body through hole 31 having the same or substantially the same inner diameter as the lower opening 11 of the valve body 10 and the lower opening 21 of the cover member 20 in the flow direction (arrow ab direction). That is, it is formed along a direction perpendicular to the rotation axis X1 direction (arrow ef direction). The ball valve body 30 has a lower opening 31b on the lower side (direction of arrow b) and an upper opening 31a on the upper side (direction of arrow a) forming the ball valve body through hole 31.

Further, the ball valve body 30 is a circular or substantially circular flat surface formed flat so as to face the output shaft insertion hole 15 in a state where the ball valve body 30 is rotatably supported by the valve chamber 14 of the valve body 10. It has 32. The flat surface 32 is formed with an output shaft fitting recess 33 as an output shaft mounting portion, which is a fitting recess having a predetermined shape and a predetermined depth, centered on the rotation axis X1. The output shaft fitting recess 33 is a recess having a predetermined depth of a bottomed cylindrical shape or a bottomed substantially cylindrical shape connected to the motor output shaft 41 of the motor 40 in the rotation axis X1 direction (arrow ef direction).

Further, the ball valve body 30 has a circular or substantially circular flat surface 34 having a diameter larger than that of the shaft support hole 16. The flat surface 32 and the flat surface 34 of the ball valve body 30 face each other and form parallel surfaces. The shaft portion 35 includes protrusions rotatably supported by the valve body 10 around the rotation axis X1. Specifically, on the flat surface 34 of the ball valve body 30, a shaft portion 35 formed of a cylindrical or substantially cylindrical protrusion having a predetermined diameter and a predetermined height about the rotation axis X1 is provided. The shaft portion 35 is a portion that functions as a shaft support portion that is rotatably supported by the shaft support hole 16 of the valve body 10. The diameter of the shaft portion 35 is slightly smaller than the diameter of the shaft support hole 16. A predetermined gap (clearance) is provided between the shaft portion 35 of the ball valve body 30 and the shaft support hole 16 of the valve body 10 in the rotation axis X1 direction (arrow ef direction), and the ball valve body 30 Is slightly movable in the rotation axis X1 direction (arrow ef direction).

The output shaft fitting recess 33 and the shaft portion 35 are arranged coaxially, and the rotation axis X1 is a central axis. Further, the ball valve body 30 is parallel to the rotation axis X1 direction (arrow ef direction), and at a position different from the upper opening 31a and the lower opening 31b by about 90 degrees in the rotation direction of the motor 40, respectively. It has a pair of parallel circular or substantially circular flat surfaces 36, 37. Further, on the outer peripheral surface of the ball valve body 30, a concave groove 38 as a concave portion having an arc shape in a plan view is provided so as to partially surround the flat surface 32 of the ball valve body 30. Further, in addition to the first inclined surface 80, a second inclined surface 81 and a jig insertion recess 82 are provided on the outer surface of the ball valve body 30. The configuration of the concave groove 38 will be described in detail in the rotation restricting unit 70 described later. Further, the configurations of the first inclined surface 80, the second inclined surface 81, and the jig insertion recess 82 will also be described later.

The motor 40 is, for example, a stepping motor, a DC (direct current) motor, a brushless DC motor, or the like. As shown in FIGS. 1 to 3, motor-side connecting portions 43 projecting in the width direction (arrow cd direction) are provided on the outer peripheral surface of the main body of the motor 40. The motor-side connecting portion 43 is a portion that is integrally connected to the ball valve-side connecting portion 17 of the valve body 10, and is connected by, for example, a screw or a snap fit. A drive signal is supplied to the motor 40 from, for example, a controller that controls the motor 40 via a lead wire (not shown), and the motor output shaft 41 is rotationally driven based on the drive signal.

The motor output shaft 41 of the motor 40 is inserted into the output shaft insertion hole 15 of the valve body 10. Therefore, the motor 40 can rotate and drive the ball valve body 30 via the motor output shaft 41. The motor output shaft 41 is provided with an output shaft fitting convex portion 42 that fits with the output shaft fitting recess 33 of the ball valve body 30. A predetermined gap (clearance) is provided between the motor output shaft 41 of the motor 40 and the output shaft fitting recess 33 of the ball valve body 30 in the rotation axis X1 direction (arrow ef direction). A D-cut is used for fitting the output shaft fitting convex portion 42 of the motor 40 and the output shaft fitting concave portion 33 of the ball valve body 30, and in this case, in the rotation axis X1 direction (arrow ef direction). An output shaft fitting convex portion 42 composed of a support column in which a D-shaped cut portion is formed by forming two planes at positions facing each other along the same direction, and two planes facing the above-mentioned two planes are formed. The output shaft fitting recess 33 is used. However, the present invention is not limited to this, and a tooth-shaped groove is formed on the outer side as the output shaft fitting convex portion 42 along the circumferential direction, and is formed on the output shaft fitting convex portion 42 as the output shaft fitting concave portion 33. Splines or serrations in which tooth-shaped grooves that mesh with each other are formed on the inside facing the tooth-shaped grooves may be used.

The fitting of the output shaft fitting convex portion 42 of the motor 40 and the output shaft fitting concave portion 33 of the ball valve body 30 is formed by fitting the motor output shaft 41 of the motor 40 and the ball valve body 30 in the rotation direction of the motor 40. In the direction of the rotation axis X1 (arrow ef direction), the ball valve body 30 can be slightly moved with respect to the motor output shaft 41 of the motor 40 by the above-mentioned clearance. There is. The motor output shaft 41 of the motor 40 is coaxial with the output shaft insertion hole 15, the shaft support hole 16, the output shaft fitting recess 33, and the shaft portion 35, and has the rotation axis X1 as the central axis.

An O-ring 60 is attached between the upper opening 12 of the valve body 10 and the outer peripheral surface of the cover member 20 to seal the gap between the valve body 10 and the cover member 20. .. Further, an O-ring 61 is attached between the inner peripheral surface of the valve body 10 forming the output shaft insertion hole 15 of the valve body 10 and the outer peripheral surface of the motor output shaft 41 of the motor 40, and the valve body. The gap between 10 and the motor output shaft 41 is sealed.

The seal member 50 is provided between the ball valve body 30 and the cover member 20 in the flow direction (arrow ab direction), and seals the gap between the ball valve body 30 and the cover member 20. The seal member 50 is held by pressing pressure from the ball valve body 30, engagement with the cover member 20 (not shown), or the like. The seal member 50 is an annular or substantially annular elastic body having the same outer diameter as the inner diameter forming the inner peripheral curved surface 14a of the valve body 10. The thickness of the seal member 50 in the flow direction (arrow ab direction) is formed to be larger than the dimension of the gap in order to improve the sealing property of the gap between the ball valve body 30 and the cover member 20. The material of the seal member 50 is not particularly limited, but to disclose an example, it is, for example, a highly elastic member such as rubber, resin, or elastomer. The seal member 50 is formed with a circular or substantially circular opening 51 having a diameter slightly larger than that of the ball valve body through hole 31 of the ball valve body 30 and the lower opening 21 of the cover member 20. In the cross-sectional shape of the seal member 50, a corner portion on the lower side (in the direction of arrow b) in contact with the ball valve body 30 is formed in an R shape. Therefore, the seal member 50 is brought into contact with the ball valve body 30 in a state of low resistance when the ball valve body 30 rotates.

FIG. 11 is a partially enlarged view schematically showing the configuration of the rotation restricting portion 70 of the ball valve 1 according to the embodiment of the present invention. The rotation restricting portion 70 has a rotation restricting structure that regulates the rotation range of the ball valve body 30 by the convex portion 18 provided on the inner peripheral curved surface 14a of the valve body 10 and the concave groove 38 of the ball valve body 30. Is. Specifically, the rotation restricting unit 70 regulates the rotation of the ball valve body 30 within a range that does not come into contact with the seal member 50 when the ball valve body 30 rotates.

As shown in FIGS. 8 to 11, the concave groove 38 of the ball valve body 30 has an arcuate shape in a plan view formed on the outer peripheral surface of the ball valve body 30 so as to partially surround the flat surface 32 of the ball valve body 30. It is a dented part. The concave groove 38 is a concave groove that is cut out from the outer peripheral surface of the ball valve body 30 toward the inside in a triangular cross section or a substantially triangular cross section. The concave groove 38 is based on a state in which the upper opening 31a is directed to the upper side (direction of arrow a) and the flat surface 36 is directed to the left side (direction of arrow d) in order to regulate the rotation range of the ball valve body 30. In the case of, it is formed in a range of about 90 degrees in a range of substantially the third quadrant in the so-called XY axis plane with the rotation axis X1 as the rotation center. In other words, the concave groove 38 is formed in a substantially C shape along the periphery of the flat surface 32 from the position near the flat surface 36 of the ball valve body 30 to the position near the lower opening 31b. .. The concave groove 38 has an arcuate curved surface (hereinafter, also referred to as “opposing curved surface”) 38a facing the convex portion 18 of the valve body 10 and a convex surface of the valve body 10 perpendicular to the facing curved surface 38a. When the flat surface facing the shaped portion 18 (hereinafter, also referred to as “opposed flat surface”) 38b is perpendicular to the facing curved surface 38a and the facing flat surface 38b and abuts with the convex portion 18, it is engaged. It has flat surfaces to stop (hereinafter, also referred to as "locking end surfaces") 38c and 38d.

As shown in FIGS. 4 to 7 and 11, the convex portion 18 of the valve body 10 is integrally provided on the inner peripheral curved surface 14a of the valve body 10 facing the seal member 50 in the flow direction (arrow ab direction). It is a triangular columnar or substantially triangular columnar protruding portion having a triangular shape in a side view protruding from the inner peripheral curved surface 14a toward the ball valve body 30. The convex portion 18 has a surface arc-shaped facing curved surface 18a facing the concave facing curved surface 38a with a slight gap (clearance), and a concave groove perpendicular to the facing curved surface 18a. The flat facing flat surface 18b facing the facing flat surface 38b with a slight gap (clearance) is perpendicular to the facing curved surface 18a and the facing flat surface 18b, and the locking end faces 38c and 38d of the concave groove 38 are formed. It has flat surfaces (hereinafter, also referred to as “locking end surfaces”) 18c and 18d that lock when it comes into contact with the surface.

According to the rotation restricting unit 70, in the ball valve 1, the movable range of the ball valve body 30 is an open state in which the valve body through hole 10h of the valve body 10 and the ball valve body through hole 31 of the ball valve body 30 communicate with each other. The ball valve body through hole 31 and the valve body through hole 10h are orthogonal to each other, and the valve body through hole 10h is restricted between the closed states closed by the flat surfaces 36 and 37. In the open state, the locking end face 18d of the convex portion 18 of the valve body 10 is in contact with the locking end face 38d of the concave groove 38 of the ball valve body 30 to be locked, and the ball valve body is further opened. 30 cannot be rotated. Further, when the ball valve body 30 is rotated in the closing direction from the open state, the locking end face 38d and the locking end face 18d are released from each other and separated from each other. The locking end surface 18c of the convex portion 18 of the valve body 10 comes into contact with the locking end surface 38c and is locked. Then, the ball valve body 30 cannot rotate in the closing direction any more.

As described above, in the ball valve 1, the ball valve body 30 is provided with a first inclined surface 80, a second inclined surface 81, and a jig insertion recess 82, and the valve body 10 is provided with a notch 83. .. As shown in FIGS. 3 and 12, the first inclined surface 80 is inclined toward the shaft portion 35 with respect to the rotation axis X1, and the output shaft fitting recess 33 and the lower opening in the direction of the rotation axis X1. It is provided in a range between 31b and the ball valve body 30 so as not to come into contact with the seal member 50 when the ball valve body 30 rotates. Further, the first inclined surface 80 does not reach the ball valve body through hole 31. The first inclined surface 80 has a shape formed by cutting out a part of the ball valve body 30 along a flat surface.

More specifically, as shown in FIGS. 8 and 9, the first inclined surface 80 is formed in a region sandwiched between the flat surface 36 and the lower opening 31b, and is formed in the output shaft fitting recess 33. The surfaces are in contact with or close to each other and do not come into contact with the flat surface 36 and the lower opening 31b. A part of the flat surface 32 and a part of the ball valve body 30 below the flat surface 32 are cut off by the first inclined surface 80. As described above, the first inclined surface 80 is located on the inner peripheral side of the ball valve body 30 with respect to other portions around the rotation axis X1. In the present embodiment, as shown in FIGS. 8 and 9, the first inclined surface 80 is provided at the same position as or substantially the same position as the concave groove 38 so as to overlap the concave groove 38 of the rotation restricting portion 70. The first inclined surface 80 cuts out a part of the facing curved surface 38a and the facing flat surface 38b of the concave groove 38 of the rotation restricting portion 70. As shown in FIGS. 8 and 9, the first inclined surface 80 is formed from the vicinity of the outer peripheral side of the output shaft fitting recess 33 of the ball valve body 30 toward the vicinity of the inner peripheral side of the opposed flat surface 38b of the concave groove 38. A plan view arc-shaped first plane 80a and a plan view sword shape formed from the vicinity of the inner peripheral side of the facing flat surface 38b toward the flat surface 36 of the ball valve body 30 and the vicinity of the outer peripheral side of the lower opening 31b. It has a second plane 80b of.

The angle between the first inclined surface 80 and the rotation axis X1, that is, the angle α between the normal of the first inclined surface 80 and the rotation axis X1, is, for example, 15 degrees to 45 degrees. However, the angle α is not limited to 15 degrees to 45 degrees, but is a value appropriately determined according to the specific form of the valve body 10 and the ball valve body 30, and the ball valve body 30 is described later. Any value may be used as long as it can be assembled or easily assembled to the valve body 10. The angle α is preferably an angle that minimizes the width of the ball valve body 30 from the first inclined surface 80 in the normal direction of the first inclined surface 80.

As shown in FIGS. 3 and 10, the second inclined surface 81 extends from the outer surface of the shaft portion 35 of the ball valve body 30 along the surface inclined toward the first inclined surface 80 with respect to the rotation axis X1. The shape is such that a part of the tip side of the shaft portion 35 is cut off along the plane. More specifically, the second inclined surface 81 is a flat surface having an arc shape in a plan view formed from the top surface of the shaft portion 35 to the flat surface 36 of the ball valve body 30 and the lower opening 31b. be. The second inclined surface 81 is a shaft in the region of the first inclined surface 80 when the first inclined surface 80 is moved downward on the outer peripheral surface of the ball valve body 30 to the shaft portion 35 along the rotation axis X1. The position of the second inclined surface 81 on the shaft portion 35, which is formed in the portion 35, is preferably closer to the center of the width around the rotation axis X1 of the moved first inclined surface 80. Further, the normal of the first inclined surface and the normal of the second inclined surface preferably extend on one surface, that is, the second inclined surface 81 is a ball valve centered on a predetermined point. It is preferable that the body 30 is flush with the first inclined surface 80 when the body 30 is rotated by a predetermined angle. Further, the angle between the second inclined surface 81 and the rotation axis X1, that is, the angle β between the normal line of the second inclined surface 81 and the rotation axis X1, is the angle β between the first inclined surface 80 and the rotation axis X1. It is smaller than the angle α of. However, the angle β between the second inclined surface 81 and the rotation axis X1 is not limited to this as long as the ball valve body 30 can be easily assembled to the valve body 10.

The jig insertion recess 82 is a recess formed on the outer surface of the ball valve body 30 for inserting a jig 84 (described later) when assembling the ball valve body 30 to the valve body 10. As shown, it is provided between the first inclined surface 80 and the second inclined surface 81 in the direction of the rotation axis X1 and between the lower opening 31b and the second inclined surface 81. More specifically, the jig insertion recess 82 is provided between the lower opening 31b and the flat surface 36 and the second inclined surface 81, and is formed in an elongated hole shape or a substantially elongated hole shape. , It is provided so as to be recessed by a predetermined depth in a direction parallel to or substantially parallel to the first inclined surface 80.

As shown in FIGS. 2 to 7, the notch 83 is provided in the lower opening 11 of the valve body 10, and a jig 84 (described later) for assembling the ball valve body 30 to the valve body 10 is inserted therein. It has become like. More specifically, the notch 83 is provided on the side wall of the lower opening 11 of the valve body 10 so as to form a bottom surface of the ball valve 1 parallel to or substantially parallel to the first inclined surface 80. It has a predetermined width and is formed so as to be cut out in a wedge shape. The cutout portion 83 is preferably provided between the output shaft insertion hole 15 and the shaft support hole 16 when viewed from the upper surface (see FIG. 7). As will be described later, the cutout portion 83 forms an escape space for the jig 84 when the ball valve body 30 is assembled to the valve body 10.

Subsequently, a method of attaching the ball valve body 30 to the valve body 10 of the ball valve 1 having the above-described configuration will be described. 13 and 14 are diagrams for explaining a method of attaching the ball valve body 30 to the valve body 10 in the ball valve 1 according to the embodiment of the present invention. First, as shown in FIG. 13, the ball valve body 30 is located below the upper opening 12 of the valve body 10 in a state where the jig 84 is inserted into the jig insertion recess 82 and supported by the jig 84. It is moved in the direction of the arrow b) and inserted into the valve body 10. By supporting the jig 84 in parallel or substantially parallel to the flow direction (arrow ab direction), the first inclined surface 80 of the ball valve body 30 can be supported in parallel or substantially parallel to the flow direction. At this time, the ball valve body 30 is inserted into the valve body 10 with the shaft portion 35 of the ball valve body 30 facing downward (in the direction of arrow b), and the ball valve body 30 in the rotation axis X1 direction of the valve body 10 The width is in the minimum state. Therefore, the ball valve body 30 can be smoothly moved downward in the valve chamber 14, and even if there is a protrusion such as a convex portion 18 in the valve chamber 14, the ball is formed in the valve chamber 14. The valve body 30 can be moved downward.

In this posture, when the ball valve body 30 is further moved downward and the shaft portion 35 is moved to the vicinity of the shaft support hole 16 of the valve body 10, the jig 84 is moved to the shaft support hole 16 as shown in FIG. The ball valve body 30 is rotated to the side (in the direction of arrow f) so that the shaft portion 35 of the ball valve body 30 fits into the shaft support hole 16 of the valve body 10 inside the valve chamber 14. As a result, the ball valve body 30 is assembled to the valve body 10. At this time, a second inclined surface 81 is formed on the shaft portion 35, the second inclined surface 81 faces the lower edge portion of the shaft support hole 16, and the shaft portion 35 is formed on the shaft support hole 16. The shaft portion 35 can be inserted into the shaft support hole 16 without being caught on the edge.

As described above, in the ball valve 1, a first inclined surface 80 that is inclined with respect to the rotation axis X1 is provided on the outer peripheral surface of the ball valve body 30. Therefore, when the valve body 10 is moved downward (in the direction of arrow b) from the upper opening 12 of the valve body 10 to be inserted into the valve body 10, or when the ball valve body 30 is moved to the vicinity of the shaft support hole 16 of the valve body 10. In addition, the ball valve body 30 can be moved with the first inclined surface 80 of the ball valve body 30 parallel to or substantially parallel to the flow direction (arrow ab direction). Therefore, the ball valve body 30 can be moved without colliding with the inner peripheral surface of the cover member 20 or the inner peripheral surface 14b of the valve body 10. Further, when the jig 84 is moved to the shaft support hole 16 side (direction of arrow f) to rotate the ball valve body 30, a part of the ball valve body 30 is formed by the first inclined surface 80. The ball valve body 30 can be assembled to the valve body 10 without colliding with the inner peripheral curved surface 14a of the valve body 10 or the convex portion 18 of the valve body 10. Therefore, even when the clearance between the valve body 10 and the ball valve body 30 is reduced, the ball valve body 30 can be easily assembled to the valve body 10, so that the ball valve 1 can be miniaturized. , The assembling property of the ball valve 1 can be improved.

Further, in the ball valve 1, since the ball valve body 30 can be pivotally supported by simply assembling the ball valve body 30 into the valve chamber 14 of the valve body 10, it is purposely urged by a spring or fixed by a mounting groove. Since it is not necessary to perform the above, it is possible to suppress an increase in the number of parts constituting the ball valve 1 and extra processing of the ball valve 1, and it is possible to suppress the complexity and size of the ball valve 1 and the ball valve. 1 can be easily formed.

Further, in the ball valve 1, a second inclined surface 81 inclined with respect to the rotation axis X1 is provided on the outer surface of the shaft portion 35. Therefore, even when the jig 84 is moved to the shaft support hole 16 side (arrow f direction) to rotate the ball valve body 30 as described above, a part of the shaft portion 35 is valved by the second inclined surface 81. The ball valve body 30 can be assembled to the valve body 10 without the shaft portion 35 colliding with the inner peripheral curved surface 14a of the main body 10 or the edge and inner peripheral surface of the shaft support hole 16. Therefore, the ball valve body 30 can be more easily assembled to the valve body 10.

Further, in the ball valve 1, the ball valve body 30 is provided with a jig insertion recess 82 for inserting a jig 84 for assembling the ball valve body 30 to the valve body 10. Further, the lower opening 11 of the valve body 10 is provided with a notch 83 into which the jig 84 for assembling the ball valve body 30 to the valve body 10 is inserted. Therefore, when the ball valve body 30 is moved downward (in the direction of arrow b) from the upper opening 12 of the valve body 10 and inserted into the valve body 10, the ball valve body 30 is inserted into the shaft support hole 16 of the valve body 10. It is easy to insert the jig 84 into the jig insertion recess 82 when moving the jig 84 to the shaft support hole 16 side (arrow f direction) to rotate the ball valve body 30. The ball valve body 30 can be moved and rotated. Further, when the jig 84 is moved to the shaft support hole 16 side (direction of arrow f) to rotate the ball valve body 30, the jig 84 is placed under the valve body 10 by using the escape space of the notch 83. The ball valve body 30 can be rotated and assembled to the valve body 10 without colliding with the side opening 11.

Further, the first inclined surface 80 is provided in a range where the ball valve body 30 does not come into contact with the seal member 50 when the ball valve body 30 rotates. Therefore, the sealed state between the ball valve body 30 and the sealing member 50 is impaired by the first inclined surface 80, and it is possible to prevent and effectively prevent the fluid from leaking into the valve chamber 14.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and includes all aspects included in the concept of the present invention and the scope of claims. In addition, each configuration may be selectively combined as appropriate so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment can be appropriately changed depending on the specific usage mode of the present invention.

For example, as the ball valve 1, the case where the rotation restricting portion 70 is formed by the concave groove 38 of the ball valve body 30 and the convex portion 18 of the valve body 10 has been described, but the present invention is not limited to this. , The rotation restricting portion 70 is provided as another mechanism, and for example, as shown in FIGS. 15 and 16, it is not necessary to have the concave groove 38 of the ball valve body 30 and the convex portion 18 of the valve body 10. .. Further, the ball valve 1 does not have to have the rotation restricting portion 70. Even in such a case, when the ball valve body 30 is moved downward (in the direction of arrow b) from the upper opening 12 of the valve body 10 and inserted into the valve body 10, the ball valve body 30 is the shaft support hole 16 of the valve body 10. The ball valve body 30 can be moved without colliding with the inner peripheral surface of the cover member 20 or the inner peripheral surface 14b of the valve body 10 when moving to the vicinity of. Further, when the jig 84 is moved to the shaft support hole 16 side (direction of arrow f) to rotate the ball valve body 30, the ball valve body 30 does not collide with the inner peripheral curved surface 14a of the valve body 10 and the ball is formed. The valve body 30 can be assembled to the valve body 10.

1 ... Ball valve, 2 ... Flow path, 10 ... Valve body, 10a ... Upper end surface, 10b ... Lower end surface, 10h ... Valve body through hole, 11 ... Lower opening, 12 ... Upper opening, 14 ... Valve chamber, 14a ... Inner peripheral curved surface, 14b ... Inner peripheral surface, 15 ... Output shaft insertion hole, 16 ... Shaft support hole, 17 ... Ball valve side connecting portion, 18 ... Convex portion, 18a ... Facing curved surface, 18b ... Facing flat surface, 18c ... Locking end face, 18d ... Locking end face, 20 ... Cover member, 20h ... Cover member through hole, 20a ... Outer wall, 21 ... Lower opening, 22 ... Upper opening, 30 ... Ball valve body, 31 ... Ball valve body through hole, 31a ... upper opening, 31b ... lower opening, 32 ... flat surface, 33 ... output shaft fitting recess, 34 ... flat surface, 35 ... shaft, 36 ... flat surface, 37 ... flat Surface, 38 ... concave groove, 38a ... facing curved surface, 38b ... facing flat surface, 38c ... locking end face, 38d ... locking end face, 40 ... motor, 41 ... motor output shaft, 42 ... output shaft fitting convex portion, 43 ... Motor side connection part, 50 ... Seal member, 51 ... Opening, 60, 61 ... O-ring, 70 ... Rotation control part, 80 ... First inclined surface, 81 ... Second inclined surface, 82 ... Jig insertion recess , 83 ... notch, 84 ... jig

Claims (8)

A cylindrical valve body provided with a first through hole having one and the other openings, and
A ball provided with a second through hole that is rotatably supported around the rotation axis with respect to the valve body and has an upper opening and a lower opening that can communicate with the first through hole of the valve body. Equipped with a valve body,
The ball valve body includes a shaft portion that is rotatably supported by the valve body around the rotation axis, and an output shaft mounting portion that mounts the output shaft of the motor on the side opposite to the shaft portion. It is provided,
The outer peripheral surface of the ball valve body is a first surface extending along a surface inclined with respect to the rotation axis between the output shaft mounting portion and the lower opening in the rotation axis direction. A ball valve characterized by having an inclined surface. The claim is characterized in that the shaft portion is composed of protrusions, and a second inclined surface formed of a surface extending along the surface inclined toward the first inclined surface side with respect to the rotating axis is provided on the outer surface. Item 1. The ball valve according to item 1. The ball valve according to claim 2, wherein the normal of the first inclined surface and the normal of the second inclined surface extend on one surface. On the outer surface of the ball valve body, the ball is formed between the first inclined surface and the second inclined surface in the direction of the rotation axis, and between the lower opening and the second inclined surface. The ball valve according to claim 2 or 3, wherein a recess for inserting a jig for assembling the valve body to the valve body is provided. The ball valve according to claim 4, wherein the one opening of the valve body is provided with a notch for inserting a jig for assembling the ball valve body to the valve body. A cover member attached to the inner surface of the valve body forming the other opening and provided with a third through hole that communicates with the first through hole.
Further provided with a sealing member for sealing the gap between the ball valve body and the cover member.
The ball according to any one of claims 1 to 5, wherein the first inclined surface is provided in a range that does not come into contact with the seal member when the ball valve body rotates. valve. A rotation restricting portion for restricting the rotation of the ball valve body is further provided at a position where the ball valve body closes the first through hole of the valve body.
The rotation restricting portion has a convex portion provided on the inner surface of the valve body and a concave portion provided on the outer surface of the ball valve body.
The ball valve according to any one of claims 1 to 6, wherein the first inclined surface is provided so as to overlap the concave portion. The concave portion of the ball valve body is an arc-shaped concave groove formed around the output shaft mounting portion.
The convex portion of the valve body is a protrusion provided on the inner surface of the valve body between an output shaft insertion hole through which the output shaft of the motor is inserted and one of the openings. The ball valve according to claim 7.

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