JP2019044929A - Ball valve - Google Patents

Abstract

To provide a ball valve which enables a reduction of the number of components and downsizing and has a simple structure.SOLUTION: A ball valve includes: a ball valve body 30 which is pivotally supported so as to rotate relative to a valve body 10 and is provided with a third through hole 31 provided so as to communicate with a passage 2 formed by a first through hole 10h of the valve body 10 and a second through hole 20h of a cover member 20; a seal member 50 which seals a gap between the ball valve body 30 and the cover member 20; and a rotation restriction part 70 which restricts rotation of the ball valve body 30 at a position where the ball valve body 30 closes the passage 2. At a range which is not brought into contact with the seal member 50 when the ball valve body 30 rotates, in the rotation restriction part 70, a protruding part 18 is provided on an inner surface of the valve body 10 and a recessed part 38 is provided on an outer surface of the ball valve body 30.SELECTED DRAWING: Figure 2

Description

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

  Conventionally, a ball valve has been used to open and close a flow path of a gas such as a gas or a liquid such as water (hereinafter referred to as a fluid). Such a ball valve is provided with a rotation restricting portion that restricts the rotation of the ball valve body at a predetermined position when the ball valve body in the valve body is rotated. In such a ball valve, for example, the key lock plate fixed to the stem is locked to the stopper plate fixed to the valve body, thereby restricting the rotation of the ball valve body at the open / close position of the ball valve. (For example, refer to Patent Document 1).

JP 2007-205485 A

  However, since the ball valve of Patent Document 1 is provided with a key lock plate and a stopper plate as separate members, the configuration of the ball valve may be complicated and large. In ball valves, simplification and miniaturization have been desired in the past, and further reduction in the number of parts of ball valves and reduction in extra protrusions are required. Thus, a simple structure that suppresses an increase in the number of parts and suppresses an increase in size has been required for a conventional ball valve.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a ball valve having a simple configuration capable of reducing the number of parts and reducing the size.

  In order to achieve the above object, a ball valve according to the present invention has a cylindrical valve body provided with a first through hole having one and the other opening, and the one opening is formed. A cover member attached to the inner surface of the valve body and provided with a second through hole communicating with the first through hole; and a pivot member pivotally supported with respect to the valve body, the first penetration of the valve body A ball valve body provided with a third through hole provided to be able to communicate with a flow path formed by the hole and the second through hole of the cover member, and between the ball valve body and the cover member A seal member that seals the gap; and a rotation restricting portion that restricts rotation of the ball valve body at a position where the ball valve body closes the flow path, the rotation restricting portion including the ball valve As long as the body rotates, the front does not come into contact with the seal member. The inner surface of the valve body with convex portion or concave portion is provided, wherein the concave portion or convex portion on an outer surface of the ball valve body is provided.

  In the ball valve according to one aspect of the present invention, the rotation restricting portion includes the ball valve body at a position where the ball valve body communicates with the flow path in addition to a position where the ball valve body closes the flow path. The concave portion or the convex portion of the valve body and the convex portion or the concave portion of the valve body are engaged to restrict the rotation of the ball valve body.

  In the ball valve according to one aspect of the present invention, the concave portion of the ball valve body is an arc-shaped concave groove formed around the fitting concave portion of the ball valve body fitted to the output shaft of the motor. And the convex portion of the valve body is provided on the inner surface of the valve body facing the sealing recess and on the side facing the seal member with the shaft portion of the ball valve body as a center. It is characterized by being a protrusion.

  In the ball valve according to the aspect of the present invention, the concave portion of the ball valve body is pivotally supported by the valve body on the opposite side of the output shaft in addition to the periphery of the fitting concave portion of the ball valve body. In addition to the inner surface of the valve body facing the fitting recess of the ball valve body, the convex portion of the valve body is formed around the end of the shaft portion of the ball valve body, and the ball It is provided in the inner surface of the said valve main body at the side of the edge part of the said shaft part of a valve body, It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the ball valve of the simple structure which can reduce a number of parts and can be reduced in size can be provided.

1 is a perspective view schematically showing an external configuration of a ball valve according to an embodiment of the present invention. It is sectional drawing which shows roughly the state by which the flow path of the ball valve which concerns on embodiment of this invention was connected. It is sectional drawing which shows schematically the state by which the flow path of the ball valve which concerns on embodiment of this invention was closed. FIG. 4 shows the configuration of the valve body of the ball valve according to the embodiment of the present invention, FIG. 4 (a) is a perspective view schematically showing the external configuration of the valve body, and FIG. FIG. 4C is a top view schematically showing a planar structure of the valve body. FIG. 5A is a perspective view schematically showing an external configuration of a ball valve body, and FIG. 5B is a ball valve configuration of the ball valve body according to the embodiment of the present invention. It is a side view which shows the planar view structure of a body. It is the elements on larger scale which show roughly the composition of the rotation control part of the ball valve concerning an embodiment of the invention. FIG. 3 is an arrow view schematically showing a state in which the flow path of the ball valve according to the embodiment of the present invention is communicated when viewed from the direction A in FIG. 2. FIG. 4 is an arrow view schematically showing a state in which the flow path of the ball valve according to the embodiment of the present invention is closed when viewed from the direction A in FIG. 3. It is sectional drawing which shows roughly the structure of 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 the ball valve 1. FIG. 2 is a cross-sectional view schematically showing a state in which the flow path 2 of the ball valve 1 according to the embodiment of the present invention is communicated. FIG. 3 is a cross-sectional view schematically showing a state in which the flow path 2 of the ball valve 1 is closed. Hereinafter, for convenience of explanation, the arrow ab direction in FIG. 1 is the fluid flow direction, the arrow a direction is the upper side, and the arrow b direction is the lower side. Further, the arrow cd 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. Furthermore, the arrow ef direction is the axis X1 direction, the arrow e direction is the left side, and the arrow f direction is the right side.

  As shown in FIG. 1, the ball valve 1 according to the embodiment of the present invention 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.

  As shown in FIGS. 2 and 3, the ball valve 1 includes a seal member 50 that seals a gap between the ball valve body 30 and the cover member 20, and a rotation that restricts the rotation of the ball valve body 30. And a movement restriction unit 70.

  FIG. 4 shows a configuration of the valve body 10 of the ball valve 1 according to the embodiment of the present invention, and FIG. 4A is a perspective view schematically showing an external configuration of the valve body, and FIG. ) Shows a cross-sectional structure of the valve body, and FIG. 4C is a top view schematically showing a planar structure of the valve body. The entire valve body 10 is formed in a hollow shape having a cylindrical shape or a substantially cylindrical shape. The outer shape of the valve body 10 is not particularly limited as long as it is cylindrical. Although this valve main body 10 is not specifically limited, If an example is disclosed, it will be formed with resin etc., for example. However, it is not limited to this, and it may be formed of metal or the like.

  Further, the valve body 10 is provided with a ball valve side connecting portion 17 that protrudes in the width direction (arrow cd direction) longer than the outer diameter of the valve body 10 on the upper part (arrow a direction) of the outer peripheral surface. The motor 40 is connected via the ball valve side connecting portion 17.

  As shown in FIGS. 2 to 4, a first through hole 10 h that penetrates between the upper end surface 10 a and the lower end surface 10 b of the valve body 10 is provided in the flow direction (arrow ab direction) of the valve body 10. The lower opening 11 and the upper opening 12 form the first through hole 10h.

  The lower opening 11 provided on the lower side (arrow b direction) is formed in a circular shape or a substantially circular shape. Further, the upper opening 12 provided on the upper side (in the 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 a fluid (for example, gas) inlet. The upper opening 12 is an outlet for the fluid flowing in from the lower opening 11 to the cover member 20.

  In the valve main body 10, an inner peripheral curved surface 14 a formed of a concave spherical curved surface whose inner diameter gradually expands from the lower opening 11 toward the upper opening 12, and an upper side (in the direction of arrow a) of the inner peripheral curved surface 14 a. It has a valve chamber 14 formed by an annular inner peripheral surface 14b extending in parallel to the upper side (arrow a direction) while maintaining the same inner diameter from the end. The valve chamber 14 is a space for pivotally supporting the ball valve body 30 so as to be rotatable.

  An output shaft insertion hole 15 including a through hole through which the motor output shaft 41, which is an output shaft of the motor 40, is inserted into the valve chamber 14 is provided on the inner peripheral surface 14 b forming the valve chamber 14 in the valve body 10. ing. Further, the inner peripheral surface 14b is formed in a concave shape having a predetermined depth of a bottomed cylindrical shape or a substantially bottomed cylindrical shape at a portion facing the output shaft insertion hole 15 in the axis X1 direction (arrow ef direction). A shaft support hole 16 is provided. The shaft center in the output shaft insertion hole 15 and the shaft center in the shaft support hole 16 coincide with each other in the direction of the axis X1 (arrow ef direction).

  The inner peripheral curved surface 14 a that forms the valve chamber 14 in the valve main body 10 is opposed to the outer peripheral surface of the ball valve body 30 with a slight clearance (clearance), and in the vicinity of the output shaft insertion hole 15. In addition, a convex portion 18 that is a triangular projection in a side view is integrally formed at a position below the output shaft insertion hole 15 (in the direction of arrow b). The configuration of the convex portion 18 will be described in detail in a rotation restricting portion 70 described later.

  As shown in FIGS. 1-3, the cover member 20 is formed in the hollow shape of the whole cylindrical shape or a substantially cylindrical shape. The material of the cover member 20 is not particularly limited, but when an example is disclosed, for example, a resin or the like is used. However, the present invention is not limited to this, and metal or the like may be used.

  The cover member 20 is provided with a second through hole 20h along a direction perpendicular to the flow direction (arrow ab direction), that is, the axis X1 direction (arrow ef direction), and two lower sides forming the second through hole 20h. It has an opening 21 and an upper opening 22.

  The lower opening 21 provided on the lower side (in the direction of arrow b) is formed in a circular shape or a substantially circular shape, and is an inflow port for fluid flowing in from the upper opening 12 of the valve body 10. The lower opening 21 has 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 a fluid flowing 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 first through hole 10 h from the upper opening 12 of the valve body 10, and the outer peripheral wall 20 a of the cover member 20 contacts the inner peripheral surface 14 b of the valve main body 10. Fixed in contact. In this fixed state, the first through hole 10h of the valve body 10 and the second through hole 20h of the cover member 20 are communicated to form a fluid flow path 2 in the ball valve 1.

  FIG. 5 shows a configuration of the ball valve body of the ball valve 1 according to the embodiment of the present invention, and FIG. 5A is a perspective view schematically showing an external configuration of the ball valve body 30. b) is a side view showing a plan view structure of the ball valve body 30. FIG. As shown in FIGS. 2, 3, and 5, the ball valve body 30 is formed in a spherical or substantially spherical shape as a whole. The material of the ball valve body 30 is not particularly limited, but an example is disclosed, for example, resin. However, it is not limited to this and may be a metal or the like.

  The ball valve body 30 has a third 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, the axis. It is formed along a direction perpendicular to the X1 direction. The ball valve body 30 has a lower side opening 31b (in the direction of arrow b) and an upper side opening 31a on the upper side (in the direction of arrow a) that form the third through hole 31. 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 pivotally supported by the valve chamber 14 of the valve body 10. 32.

  On the flat surface 32, an output shaft fitting recess 33 as a fitting recess having a predetermined shape and a predetermined depth is formed around the axis X1. The output shaft fitting recessed portion 33 is a recessed portion having a predetermined depth of a bottomed columnar shape or a substantially bottomed columnar shape that pivotally supports the motor output shaft 41 of the motor 40 in the 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 in a state facing the shaft support hole 16 of the valve body 10. The flat surface 32 and the flat surface 34 of the ball valve body 30 face away from each other and form parallel surfaces.

  The flat surface 34 of the ball valve body 30 is provided with a shaft portion 35 made of a cylindrical or substantially cylindrical protrusion having a predetermined diameter and a predetermined height with the axis X1 as the center. 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 height of the shaft portion 35 is slightly smaller than the depth of the shaft support hole 16. Between the shaft part 35 of the ball valve body 30 and the shaft support hole 16 of the valve body 10, there is a predetermined gap (clearance) in the direction of the axis X1 (arrow ef direction). It is slightly movable in the direction of the axis X1 (arrow ef direction).

  The shaft center in the output shaft fitting recess 33 and the shaft center in the shaft portion 35 coincide with each other in the direction of the axis X1 (arrow ef direction). The ball valve body 30 is parallel to the direction of the axis X1 (arrow ef direction), and the upper opening portion 31a and the lower opening portion 31b are respectively paired at positions that differ by about 90 degrees in the rotation direction of the motor 40. It has parallel circular or substantially circular flat surfaces 36 and 37. Further, a concave groove 38 as a concave portion having an arc shape in plan view is provided 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. The configuration of the concave groove 38 will be described in detail in a rotation restricting portion 70 described later.

  As shown in FIGS. 1 to 3, the motor 40 is, for example, a stepping motor, a DC (direct current) motor, a brushless DC motor, or the like. On the outer peripheral surface of the main body of the motor 40, motor-side connecting portions 43 that protrude in the width direction (arrow cd direction) are provided. 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. For example, a drive signal is supplied to the motor 40 via a lead wire (not shown) from a controller or the like that controls the motor 40, and the motor output shaft 41 is driven to rotate based on the drive signal.

  The motor output shaft 41 of the motor 40 is inserted through the output shaft insertion hole 15 of the valve body 10. Therefore, the motor 40 can rotationally 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 concave portion 33 of the ball valve body 30.

  A predetermined clearance (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 direction of the axis X1 (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, along the direction of the axis X <b> 1 (arrow ef direction). The output shaft fitting convex part 42 which consists of the support | pillar in which the D-shaped cut part was formed by forming two planes in the position which opposes, and the output in which two planes which oppose the above-mentioned two planes were formed A shaft fitting recess 33 is used. However, the present invention is not limited to this, and a tooth-like groove is formed on the outer side along the circumferential direction as the output shaft fitting convex portion 42, and is formed on the output shaft fitting convex portion 42 as the output shaft fitting concave portion 33. Splines or serrations in which toothed grooves that mesh with each other are formed on the inner side facing the toothed grooves may be used.

  The fitting between 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 performed between the motor output shaft 41 of the motor 40 and the ball valve body 30 in the rotational direction of the motor 40. Is rotated integrally with the motor output shaft 41 of the motor 40 in the direction of the axis X1 (arrow ef direction). The motor output shaft 41 of the motor 40 coincides with the shaft center in the output shaft insertion hole 15, the shaft support hole 16, the output shaft fitting recess 33, and the shaft portion 35 in the direction of the axis X1.

  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 a gap between the valve body 10 and the cover member 20. . An O-ring 61 is attached between the inner peripheral surface of the valve main body 10 forming the output shaft insertion hole 15 of the valve main body 10 and the outer peripheral surface of the motor output shaft 41 of the motor 40. 10 and the motor output shaft 41 are 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 a gap between the ball valve body 30 and the cover member 20. The seal member 50 is held by a pressing force from the ball valve body 30 or an engagement (not shown) with the cover member 20.

  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 larger than the dimension of the gap in order to improve the sealing performance 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 an example is disclosed, 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 slightly larger diameter than the third 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 sealing member 50, the lower corner (in the direction of arrow b) that contacts the ball valve body 30 is formed in an R shape. Therefore, when the ball valve body 30 is rotated, the seal member 50 is brought into contact with less resistance.

  FIG. 6 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 restricts the rotation range of the ball valve body 30 by the convex portion 18 provided on the inner peripheral curved surface 14 a of the valve body 10 and the concave groove 38 of the ball valve body 30. It is. Specifically, the rotation restricting portion 70 restricts the rotation of the ball valve body 30 within 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.

  As shown in FIGS. 5 and 6, the concave groove 38 of the ball valve body 30 is a circle in 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 an arcuate recess. 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 the state in which the upper opening 31a is directed upward (in the direction of arrow a) and the flat surface 36 is directed in the left direction (in the direction of arrow d) in order to regulate the rotation range of the ball valve body 30. In this case, it is formed in the range of about 90 degrees in the range of the third quadrant on the so-called XY axis plane with the 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 over a range from a position near the flat surface 36 of the ball valve body 30 to a position near the lower opening 31b. .

  The concave groove 38 is an arcuate curved surface (hereinafter also referred to as “opposing curved surface”) 38a facing the convex portion 18 of the valve body 10 and the convex surface of the valve body 10 perpendicular to the opposing curved surface 38a. When the flat surface (hereinafter also referred to as “opposing flat surface”) 38 b facing the convex portion 18 is perpendicular to the opposing curved surface 38 a and the opposing flat surface 38 b and is in contact with the convex portion 18, And flat surfaces (hereinafter also referred to as “locking end surfaces”) 38c and 38d.

  As shown in FIGS. 4 and 6, 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 triangular prism-like or substantially triangular prism-shaped protruding portion that protrudes from the inner circumferential curved surface 14 a toward the ball valve body 30.

  The convex portion 18 includes a concave surface groove 18a having a slight gap (clearance) opposed to the circular arc-shaped opposing curved surface 38a of the concave groove 38, and a concave groove that is perpendicular to the opposing curved surface 18a. 38. The flat opposed flat surface 18b facing the flat opposed surface 38b with a slight clearance (clearance), the opposed curved surface 18a and the opposed flat surface 18b, and perpendicular to the opposed curved surface 18a and the engaging end surfaces 38c and 38d of the concave groove 38. And flat surfaces (hereinafter also referred to as “locking end surfaces”) 18c and 18d that are locked when they come into contact with each other.

  Subsequently, the operation of the ball valve 1 having the above-described configuration will be described. In the ball valve 1, the ball valve body 30 is rotated to one side by the motor 40, and as shown in FIG. 2, the flow path 2 (the first through hole 10h and the second through hole 20h) of the ball valve 1 and the When the third through hole 31 of the ball valve body 30 is in communication, it is possible to set the fluid in a state in which fluid can flow from the lower opening 11 of the valve body 10 to the upper opening 22 of the cover member 20. Become.

  Here, FIG. 7 is an arrow view schematically showing a state in which the flow path 2 of the ball valve 1 according to the embodiment of the present invention is communicated as viewed from the direction A in FIG. When the flow path 2 (the first through hole 10h and the second through hole 20h) of the ball valve 1 and the third through hole 31 of the ball valve body 30 communicate with each other, the concave groove 38 of the ball valve body 30 is locked. It is in a default state in which the locking end surface 18d of the convex portion 18 of the valve body 10 is in contact with and locked with the end surface 38d.

  In this default state, the third through hole 31 of the ball valve body 30 and the flow path 2 (the first through hole 10h and the second through hole 20h) of the ball valve 1 are in communication with each other, and the lower opening of the valve body 10 is opened. A fluid can flow from the portion 11 toward the upper opening 22 of the cover member 20.

  Thereafter, in this state, when the motor 40 receives a drive signal for closing the flow path 2 (the first through hole 10h and the second through hole 20h) of the ball valve 1 from the controller or the like, the motor 40 outputs the motor output. The shaft 41 is rotated in the counterclockwise direction in FIG. 7, and the ball valve body 30 is rotated in the counterclockwise direction in accordance with the rotation of the motor output shaft 41 of the motor 40.

  8 is an arrow view schematically showing a state where the flow path 2 (the first through hole 10h and the second through hole 20h) of the ball valve 1 is closed as viewed from the direction A in FIG. is there. As described above, when the ball valve body 30 is rotated in the counterclockwise direction, the engaging end surface 38c of the concave groove 38 of the ball valve body 30 is engaged with the engaging portion 38c of the valve body 10 as shown in FIG. As a result of the stop surface 18c being brought into contact and locked, further rotation of the ball valve body 30 in the counterclockwise direction is restricted.

  As a result, the ball valve body 30 rotates about 90 degrees counterclockwise, and the third through hole 31 of the ball valve body 30 and the flow path 2 of the ball valve 1 (the first through hole 10h and the second through hole 20h). ) And the flow path 2 (the first through hole 10h and the second through hole 20h) are closed, and the flow from the lower opening 11 of the valve body 10 to the upper opening 22 of the cover member 20 is performed. Is shut off and the flow of fluid stops.

  Further, as shown in FIG. 8, when the motor 40 receives a drive signal for bringing the flow path 2 of the ball valve 1 into a communication state from a controller or the like in the closed state of the flow path 2, the motor 40 turns the motor output shaft 41 to the clock. The ball valve body 30 is rotated in the clockwise direction in accordance with the rotation of the motor output shaft 41 of the motor 40.

  When the ball valve body 30 is rotated in the clockwise direction, the engagement end face 18d of the convex portion 18 of the valve body 10 comes into contact with the engagement end face 38d of the concave groove 38 of the ball valve body 30 as shown in FIG. The ball valve body 30 is further prevented from rotating in the clockwise direction.

  As a result, the flow path 2 of the ball valve 1 and the third through hole 31 of the ball valve body 30 are in communication with each other, and the fluid again flows from the lower opening 11 of the valve body 10 toward the upper opening 22 of the cover member 20. Flows out.

  As described above, in the ball valve 1, the rotation restricting portion 70 includes the concave groove 38 of the ball valve body 30 and the convex portion 18 of the valve main body 10. In addition, it is not provided as a separate member from the ball valve body 30, and an extra protrusion or the like is not provided.

  For this reason, it is possible to realize a simple and downsized configuration while preventing the configuration of the ball valve 1 from becoming complicated and large. Further, the concave groove 38 constituting the rotation restricting portion 70 is formed integrally with the ball valve body 30 by injection molding, and the convex portion 18 constituting the rotation restricting portion 70 is formed with the valve body 10 by injection molding. It is integrally formed.

  As described above, in the ball valve 1, the ball valve body 30 is simply attached to the valve chamber 14 of the valve body 10 in a state where the ball valve body 30 can be pivotally supported, and it is not necessary to provide the rotation restricting portion 70 as a separate member. It is possible to prevent an increase in the number of parts constituting the part 1 and to form the parts easily. Thus, in the ball valve 1, the rotation range of the ball valve body 30 can be easily limited by the convex portion 18 of the valve body 10 within the rotation range of the concave groove 38 of the ball valve body 30.

  At this time, the rotation range of the concave groove 38 of the ball valve body 30 in the rotation restricting portion 70 is about 90 degrees at the maximum about the convex portion 18 on the lower opening 11 side of the valve body 10 with respect to the axis X1. is there. That is, the concave groove 38 of the ball valve body 30 does not come into contact with the seal member 50 attached between the valve main body 10 and the cover member 20.

  For this reason, since the concave groove 38 of the ball valve body 30 does not come into contact with the seal member 50, the sealed state between the ball valve body 30 and the seal member 50 is damaged by the concave groove 38, and the valve chamber 14 is fluidized. Can be effectively and effectively prevented from leaking.

  Further, in the rotation restricting portion 70, the convex portion 18 is provided on the inner peripheral curved surface 14 a of the valve body 10, and the outer peripheral surface of the ball valve body 30 has a slight gap (clearance) and a concave shape. By providing the groove 38, the convex portion 18 can be reliably locked to the concave groove 38 when the ball valve body 30 rotates in the valve chamber 14 of the valve body 10. That is, even when the ball valve element 30 moves in the valve chamber 14 of the valve body 10 in the direction of the axis X1 by a slight clearance, a situation in which the convex portion 18 is not locked to the concave groove 38 is avoided. can do. This means that assembly errors in the direction of the axis X1 and machining errors of the valve body 10 and the ball valve body 30 can be tolerated to some extent.

  The rotation restricting portion 70 is constituted by a separate combination in which the convex portion 18 is provided on the inner peripheral curved surface 14 a of the valve body 10 and the concave groove 38 is provided on the outer peripheral surface of the ball valve body 30. . Thereby, in the ball valve 1, the mounting direction in the direction of the axis X <b> 1 of the ball valve body 30 when the ball valve body 30 is mounted on the valve chamber 14 of the valve body 10 is visually recognized by the operator by the convex portion 18 and the concave groove 38. Can be attached easily and accurately.

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

  In addition, as the ball valve 1, the case where the rotation restricting portion 70 is configured by the concave groove 38 of the ball valve body 30 and the convex portion 18 of the valve main body 10 has been described, but the present invention is not limited thereto. A plurality of rotation restricting portions 70 may be provided. For example, as shown in FIG. 9, the ball valve 1 has the same configuration as the rotation restricting portion 70 at a position symmetrical to the rotation restricting portion 70 on the opposite side of the ball valve body 30 in the direction of the axis X1. You may provide the rotation control part 80 which consists of the concave groove 81 and the convex-shaped part 82. FIG.

  More specifically, the rotation restricting portion 80 includes the concave groove 38 of the ball valve body 30, the concave groove 81 provided at a position facing away from the axis X1 (arrow ef direction), and the convex shape of the valve body 10. And a convex portion 82 provided at a position facing the portion 18 in the direction of the axis X1 (arrow ef direction). In this way, by restricting the rotation of the ball valve body 30 by the plurality of rotation restricting portions 70 and 80, the load on the rotation restricting portion is dispersed, and the concave grooves 38 and 81 and the convex portion 18 are dispersed. , 82 can be prevented in advance, and the rotation of the ball valve body 30 can be reliably restricted. Further, by ensuring the symmetry of the members, the dimensional accuracy at the time of molding is improved and the weight balance is also improved. Therefore, the rotation accuracy at the time of rotation of the ball valve body 30 can be increased. 30 rotational behaviors can be stabilized.

  Furthermore, the embodiment of the present invention has been described by taking as an example the case where the ball valve 1 includes the rotation restricting portion 70 having the concave groove 38 of the ball valve body 30 and the convex portion 18 of the valve body 10. The convex portion 18 may be provided on the valve body 30 and the concave groove 38 may be provided on the valve main body 10.

  Furthermore, although the case where the rotation range by the concave groove 38 and the convex portion 18 is set to about 90 degrees has been described, the present invention is not limited to this, and the flow path 2 (first through hole) of the ball valve 1 is not limited thereto. 10h and the second through hole 20h) and the third through hole 31 of the ball valve body 30 may communicate with each other, for example, a rotation range of about 80 degrees to about 100 degrees.

  Furthermore, although the case where there is a slight gap (clearance) between the inner peripheral curved surface 14 a and the outer peripheral surface of the ball valve body 30 is described, between the inner peripheral curved surface 14 a and the outer peripheral surface of the ball valve body 30. May be slidably in contact with each other. Furthermore, although the case where there is a slight gap (clearance) between the opposed curved surface 38a and the opposed curved surface 18a and between the opposed flat surface 38b and the opposed flat surface 18b, the opposed curved surface 38a and the opposed curved surface 18a are described. And between the opposed flat surface 38b and the opposed flat surface 18b may be slidably in contact with each other.

  DESCRIPTION OF SYMBOLS 1 ... Ball valve, 2 ... Flow path, 10 ... Valve body, 10a ... Upper end surface, 10b ... Lower end surface, 10h ... 1st through-hole, 11 ... Lower side opening part, 12 ... Upper side opening part, 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 ... opposed curved surface, 18b ... opposed flat surface, 18c ... Locking end surface, 18d ... Locking end surface, 20 ... Cover member, 20h ... Second through hole, 20a ... Outer peripheral wall, 21 ... Lower opening, 22 ... Upper opening, 30 ... Ball valve element, 31 ... 3rd through-hole, 31a ... upper side opening part, 31b ... lower side opening part, 32 ... flat surface, 33 ... output shaft fitting recessed part, 34 ... flat surface, 35 ... shaft part, 36 ... flat surface, 37 ... flat surface , 38 ... concave groove, 38a ... opposed curved surface, 38b ... opposed flat surface, 38c ... locking end surface, 38d ... locking Surface, 40 ... motor, 41 ... motor output shaft, 42 ... output shaft fitting convex portion, 43 ... motor side connecting portion, 50 ... sealing member, 51 ... opening portion, 60, 61 ... O-ring, 70 ... rotation restriction Part, 80 ... rotation restricting part, 81 ... concave groove, 82 ... convex part

Claims (4)

A tubular valve body provided with a first through hole having one and the other opening;
A cover member attached to the inner surface of the valve body forming the one opening and provided with a second through hole communicating with the first through hole;
A third through which is pivotally supported with respect to the valve main body and is provided to be able to communicate with a flow path formed by the first through hole of the valve main body and the second through hole of the cover member. A ball valve body with holes,
A seal member that seals a gap between the ball valve body and the cover member;
A rotation restricting portion for restricting the rotation of the ball valve body at a position where the ball valve body closes the flow path,
The rotation restricting portion is provided with a convex portion or a concave portion on the inner surface of the valve main body within a range not contacting the seal member when the ball valve body rotates, and the ball valve body A ball valve, wherein a concave portion or a convex portion is provided on the outer surface of the ball valve. In addition to the position at which the ball valve body closes the flow path, the rotation restricting portion has the concave portion or the convex portion of the ball valve body at a position where the ball valve body communicates with the flow path. The ball valve according to claim 1, wherein the convex portion or the concave portion of the valve main body is engaged to restrict the rotation of the ball valve body. The concave portion of the ball valve body is an arc-shaped concave groove formed around a fitting concave portion of the ball valve body that is fitted to an output shaft of a motor,
The convex portion of the valve body is a projection provided on the inner surface of the valve body facing the sealing recess and facing the seal member with the shaft portion of the ball valve body as a center. The ball valve according to claim 1, wherein the ball valve is a part. The concave portion of the ball valve body includes, in addition to the periphery of the fitting concave portion of the ball valve body, an end portion of the shaft portion of the ball valve body that is pivotally supported by the valve body on the opposite side of the output shaft. Formed around
In addition to the inner surface of the valve body facing the fitting recess of the ball valve body, the convex portion of the valve body has an inner surface of the valve body on the end side of the shaft portion of the ball valve body. The ball valve according to claim 3, wherein the ball valve is provided.

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