JP4843561B2 - A ball valve device with a built-in strainer using a retaining ring and a retaining ring. - Google Patents

Description

  The present invention relates to a retaining ring that fits into a groove provided on the inner periphery of a cylindrical body, and more particularly to a retaining ring that is easy to attach and detach and a ball valve device with a built-in strainer that uses the retaining ring.

  Currently, a retaining ring is used to insert a part into a cylindrical hole provided with a groove and prevent the part from moving or leaving by inserting the part into the groove. . Such a retaining ring is generally called a snap ring or a retainer ring, and is formed in a C shape having a notch in a part of an annular shape. Further, the notch portion of the retaining ring has a hole portion that protrudes toward the center and into which the tip of a snap ring plier or the like for applying an external force can be inserted.

  When inserting such a retaining ring into the groove, first, by applying an external force with a snap ring plier in a direction in which both ends of the notch are close to each other, the retaining ring is elastically deformed to reduce the outer diameter. When the retaining ring is inserted into the hole in this state and the external force is removed at the position where the groove is provided, the outer diameter of the retaining ring that is elastically deformed returns to its original size and is thus fitted into the groove. The snap ring inserted in the groove in this way has axial strength by preventing the movement and separation of the component by having the axial surface in contact with the side surface of the groove or the component. It becomes.

While retaining the function of the retaining ring, keep the retaining ring at a fixed position by forming a retaining ring that reduces the force required to bring the notch close together, or by forming a convex part on the retaining ring. A retaining ring that can be fixed is also known (see, for example, Patent Document 1 and Patent Document 2).
JP 2004-324828 A JP 2000-120633 A

  The above-described retaining ring has the following problems. That is, the minimum diameter of the retaining ring when the retaining ring is made smaller by making the retaining ring notch portion close to each other is determined by the separation distance of the notching portion and the outer diameter of the retaining ring. Further, the outer diameter shape of the retaining ring is formed by one arc, and the inner diameter is formed by one arc with the position slightly shifted from the center of the outer diameter, so that the outer circumference and the inner circumference have different thicknesses. Yes. For this reason, the amount of elastic deformation when an external force is applied to the notch and the retaining ring is elastically deformed differs in each part of the retaining ring, and the shape of the resiliently deformed retaining ring is an elliptical ring shape.

  For this reason, there may be little difference between the outer diameter of the retaining ring before elastic deformation and the maximum outer diameter of the elliptical retaining ring after elastic deformation. That is, there is almost no difference between the maximum outer diameter of the retaining ring after elastic deformation and the inner diameter of the hole into which the retaining ring is inserted, and it is difficult to fit the retaining ring into the groove, or the retaining ring is elastically deformed. Even if it exists, the maximum diameter of the retaining ring may be larger than the inner diameter of the hole, and may not be fitted.

  Therefore, an object of the present invention is to provide a retaining ring that can be easily attached and detached, and a ball valve device with a built-in strainer that makes it easy to attach and detach the retaining ring.

  In order to solve the problems and achieve the object, the retaining ring and the strainer built-in ball valve device using the retaining ring according to the present invention are configured as follows.

In the C-shaped retaining ring formed to be detachable in a groove provided on the inner peripheral surface of the cylindrical member, the outer periphery is formed of arcs having a plurality of different diameters, and at least from the center to the outside of both ends. An annular part formed in an elliptical shape whose distance to the diameter is shorter than the distance to the outer diameter in the other direction, and provided at both ends of the annular part, the annular part from each of the both ends of the annular part. Projecting in the direction of the center of the ring, projecting portions formed so as to be able to apply an external force in the direction in which both ends of the annular portion approach each other, and in the direction opposite to the direction in which the external force is applied from the tip of the projecting portion And an external force application unit having a protruding return part .

An inflow port and an outflow port are formed on both sides of the valve chamber, a valve case having an opening between the inflow port and the outflow port, the valve chamber being rotatably provided, and the inflow port therein And a ball valve capable of opening and closing between the inflow port and the outflow port by rotational displacement, and inserted into the communication path through the opening. The strainer is removed and the opening edge of the communication passage is locked with the strainer, and the outer periphery has a plurality of different diameters that are inserted into a groove provided at the opening end of the communication passage and restrict the movement of the strainer. An annular portion formed from an arc and having an elliptical shape in which the distance from the center to the outer diameter at both ends thereof is shorter than the distance to the outer diameter in the other direction, and both ends of the annular portion Provided in each of the annular portions from both ends of the annular portion. Projecting portions that protrude in the direction, and are formed so as to be able to apply external force in directions in which both ends of the annular portion are close to each other, and a return portion that further projects in the direction opposite to the direction in which the external force is applied from the tip of the projecting portion And a C-shaped retaining ring including an external force application unit .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the ball valve apparatus with a built-in strainer which can make attachment / detachment easy and the attachment / detachment of a retaining ring easy.

  FIG. 1 is a side view showing a partial cross section of a strainer built-in ball valve device (hereinafter “ball valve device”) 1 according to an embodiment of the present invention, and FIG. FIGS. 3 and 3 are top views showing a retaining ring 40 used in the ball valve device 1. In addition, the arrow F in FIG. 1 shows the flow direction of the liquid.

As shown in FIGS. 1 and 2, the ball valve device 1 includes a valve case 10 and a ball valve 30 provided in the valve case 10.
The valve case 10 includes a cylindrical outer shell portion 11 and a cover portion 12 that is screwed into the outer shell portion 11. Further, the valve case 13 is formed in the valve case 10 by screwing the outer shell portion 11 and the cover portion 12 together.

  The outer shell portion 11 is formed with an inflow port 14 and a valve insertion port 18 in which a female screw portion 18a is formed. The outer shell portion 11 is a direction orthogonal to the fluid traveling direction, and is screwed into the opening portion 19 having a female screw portion and the male screw portion of the opening portion 19 at a position corresponding to a ball valve 30 described later. And a lid 20 to be joined. The opening 19 is formed with a diameter capable of inserting and removing a strainer 34 described later.

  A male screw portion 12 a is formed in the cover portion 12 at a position facing the outer shell portion 11. The valve case 10 is formed by screwing the outer shell portion 11 and the cover portion 12 together.

  The valve chamber 13 has annular ball seats 21 on both sides of the valve chamber. The ball seat 21 seals the ball valve 30 and supports the ball valve 30 in a rotatable manner.

  Both the inflow port 14 and the outflow port 15 communicate with the valve chamber 13. The inlet 14 and the outlet 15 are respectively formed with pipe screw portions 14a and 15a that are tapered screws, and the inlet 14 that is supplied with fluid, for example, water, is connected to the inlet 14 as an outlet. The outflow side piping 17 which guides water to a predetermined place is connected to 15, respectively.

  The ball valve 30 is disposed in the valve chamber 13 and includes a communication passage 31 formed so that the inlet 14 and the outlet 15 can communicate with each other. Further, the ball valve 30 is provided at a valve shaft 32 extending in a direction orthogonal to the flow path from the inlet 14 to the outlet 15, and at the tip of the valve shaft 32, and is configured to be able to turn the valve shaft 32. A switching lever 33 is provided.

  The valve shaft 32 is provided so that the tip end portion of the valve shaft 32 protrudes outside the outer shell portion 11, and the ball valve 30 can be rotated by rotating the valve shaft 32 by the switching lever 33. ing.

  The ball valve 30 includes a strainer 34 in the communication passage 31 of the ball valve 30, a locking portion 35 having a step for locking the strainer 34, and a wall portion of the communication passage 31. A groove 36 provided on the inlet 14 side from the portion 35 and a retaining ring 40 fitted in the groove 36 are provided.

  The strainer 34 has an opening edge (hereinafter referred to as “flange portion”) 34a having a circular shape and a step, and a bottomed cylindrical mesh portion 34b for removing foreign matters such as contaminants assembled to the inner peripheral portion of the flange portion 34a. It is locked by being inserted until the flange portion 34a hits the locking portion 35.

  As shown in FIG. 3, the retaining ring 40 is a C-shaped substantially elliptical ring shape, and a cutout portion 41 is provided in a part thereof, and has two different diameters (R1 and R2 in FIG. 3). It is formed into a shape. The retaining ring 40 is formed by punching with a steel material such as a spring steel material or a polished special band steel, and is formed so as to be elastically deformable by applying an external force in the proximity direction of both ends of the notch 41.

  The inner diameter of the retaining ring 40 is 2 on the basis of the position of the center line C2 obtained by moving the center of the inner diameter from the center line C of the outer diameter R1 to the notch 41 side so that the thickness to the outer diameter differs at each position. It is formed by an arc having two radii (R3, R4 in FIG. 3). As a result, the difference between the inner diameter and the outer diameter is the largest at the position facing the notch 41, and the difference between the inner diameter and the outer diameter is reduced as the distance from the notch 41 is increased. . In addition, the dashed-two dotted line D in FIG. 3 has shown typically the shape of the conventional retaining ring which formed the outer diameter by one radius.

  That is, the retaining ring 40 has a cutout portion 41 with a part cut off on the circumference, and is formed at both ends of the cutout portion 41 and an elliptical ring portion 42 having two outer diameters. , And a protrusion 44 having an external force application portion (hereinafter referred to as “insertion hole”) 43 into which a tip of a dedicated tool (for example, snap ring pliers) can be inserted and external force can be applied.

  In the ball valve device 1 configured as described above, water flows from the inlet 14 to the outlet 15 as indicated by the flow F of water. At this time, if there is a foreign matter in the water, the foreign matter is received (removed) by the mesh portion 34b of the strainer 34, so that the foreign matter does not flow downstream, that is, toward the outlet 15 side.

  Further, the ball valve 30 is also rotated via the valve shaft 32 by rotating the switching lever 33 by approximately 90 °. Thereby, the communication path 31 of the ball valve 30 is positioned in a direction orthogonal to the water flow F, and the outer surface of the ball valve 30 is in contact with the ball seat 21 and sealed. In this way, the water is blocked from the ball valve 30 (water is stopped). That is, when the switching lever 33 is directed in the direction of water flow of the ball valve 30, the communication path 31 communicates between the inlet 14 and the outlet 15. When the switching lever 33 is rotated approximately 90 ° from the water flow direction and the ball valve 30 is directed in the water stop direction, the water is blocked and the water flow and the water stop are switched.

  In this way, foreign substances contained in the water are removed while water is passed and stopped, and maintenance such as cleaning and replacement of the strainer 34 is performed after use for a certain period of time. Next, this maintenance will be described.

  First, the switching lever 33 is operated to rotate the ball valve 30 to block the flow of water. Next, in this water stop state, the lid 20 is removed and the opening 19 is opened. When the opening 19 is opened in a water-stopped state, the communication path 31 of the ball valve 30 can be visually confirmed from the opening 19. Thereby, the retaining ring 40 can be visually observed.

  Next, the tip of a tool such as a snap ring plier (hereinafter referred to as “plier”) is inserted into the open opening 19, and the tip is inserted into the insertion hole 43 of the retaining ring 40. After that, when an external force is applied by the pliers in a direction in which the cutout portion 41 approaches and the end portion of the cutout portion 41 is brought close, the annular portion 42 of the retaining ring 40 is elastic in the direction in which the outer diameter of the retaining ring 40 is reduced. Deform. For this reason, since the outer diameter of the retaining ring 40 is smaller than the inner diameter of the communication path 31, the retaining ring 40 can be detached from the groove 36. With this operation, the retaining ring 40 is removed from the ball valve 30.

  Since the strainer 34 is released from being fixed by removing the retaining ring 40, the strainer 34 is pulled out from the ball valve 30, and maintenance work such as cleaning (removing attached foreign matter) or replacement of the strainer 34 is performed.

  When the maintenance is completed and the strainer 34 is returned, the procedure reverse to that described above is performed. First, the strainer 34 is accommodated in the communication path 31 of the ball valve 30. An external force is applied to the retaining ring 40 by the pliers, elastically deformed to the reduction side, the retaining ring 40 is moved to the groove 36, and the external force is removed, so that the retaining ring 40 is fitted into the groove 36. As a result, the strainer 34 is fixed to the ball valve 30 again. Thereafter, the lid 19 closes the opening 19 to return to the ball valve device 1 before maintenance. And water will flow through ball valve device 1 by making changeover lever 33 into the direction of water again.

  The retaining ring 40 is inserted into the insertion hole 43 and an external force is applied in the direction in which both ends of the notch 41 are close to each other, whereby the annular portion 42 is elastically deformed and the diameter of the retaining ring 40 is reduced. Will be. At this time, due to the two different diameters, the outer diameter shape of the annular portion 42 is formed in an elliptical shape with a short distance from the center of the outer diameter in the direction of the cutout portion 41. The radial shape becomes a substantially circular shape when the notch 41 is close to the radial shape. For this reason, the maximum diameter of the retaining ring 40 after elastic deformation becomes substantially the same, and the maximum diameter of the retaining ring 40 after elastic deformation is reduced.

  In other words, when an external force is applied to the notch portion of the retaining ring having an outer diameter formed by one diameter and the notch portion is brought close by elastic deformation, the outer diameter shape of the retaining ring after elastic deformation is from the center. It becomes a substantially elliptical shape in which the direction of the notch is long. On the other hand, when the retaining ring 40 is elastically deformed and reduced due to the two diameters, the outer diameter of the retaining ring 40 formed in a substantially elliptical shape with the direction of the notch 41 being short, the outer diameter shape after the elastic deformation is It becomes a substantially circular shape. Thereby, the radius in each direction becomes substantially the same, and the difference between the maximum diameter and the minimum diameter of the retaining ring 40 after elastic deformation becomes small. That is, the outer diameter after elastic deformation becomes smaller. This makes it possible to reliably have a difference between the maximum diameter of the retaining ring 40 after elastic deformation and the diameter of the communication path 31 when the retaining ring 40 is attached / detached, and to interfere with the inner diameter of the communication path 31 during attachment / detachment. Can be reduced.

  By adopting such a configuration, even when the retaining ring 40 is attached or detached during maintenance of the strainer 34, the retaining ring 40 formed in an elliptical shape whose outer diameter is short in the direction of the notch 41 is elastically deformed to be elastic. By reducing the maximum diameter at the time of deformation, the retaining ring 40 can be easily attached to and detached from the groove 36 via the communication path 31. That is, the difference between the maximum diameter of the retaining ring 40 before elastic deformation and the maximum diameter of the retaining ring 40 after elastic deformation can be increased. For this reason, the work of attaching and detaching the retaining ring 40 is facilitated, and further, the area of the annular portion 42 contacting the groove 36 of the retaining ring 40 is not reduced. Thus, workability such as maintenance and attachment / detachment can be improved without lowering the function of the retaining ring 40. For this reason, it is possible to prevent a decrease in reliability such as detachment of the retaining ring 40.

  Further, not only when the retaining ring 40 is used in the ball valve device 1 but also when the retaining ring 40 is inserted into the groove provided in the inner diameter of the cylindrical hole, the inner diameter of the hole and the retaining ring 40 Accordingly, the retaining ring 40 can be easily attached and detached. The retaining ring 40 can be applied to various things such as receiving a rotation shaft for rotating the swash plate of the oblique shaft pump.

  As described above, according to the ball valve device 1 according to the present embodiment, the retaining ring 40 can be easily attached and detached in the attachment and detachment of the strainer 34 and the like without reducing the function and reliability of the retaining ring 40, and workability is improved. Can be improved.

  Next, a first modification of the above-described retaining ring 40 will be described with reference to FIG.

  FIG. 4 is a top view showing a retaining ring 40A according to the first modification of the above-described embodiment. 4 that are the same as those in FIGS. 1 to 3 are given the same reference numerals, and detailed descriptions thereof are omitted.

  The retaining ring 40 </ b> A includes projecting portions 45 that project from both end portions of the notch portion 41 toward the center of the annular portion 42.

  In the retaining ring 40A configured in this way, an external force is applied in a direction in which the notch 41 comes close to the protrusion 45 provided in the notch 41 of the retaining ring 40A, for example, with a tool having a thin tip such as a radio pliers. Is applied. Thereby, the edge part of the notch part 41 adjoins, and when the annular part 42 of the retaining ring 40 elastically deforms, it elastically deforms in the direction in which the outer diameter of the retaining ring 40 reduces.

  With such a configuration, the retaining ring 40A can be attached and detached with a pair of radio pliers and the like, while having the same effect as the retaining ring 40A described above, without requiring a special tool such as a pliers. For this reason, it becomes possible to reduce the burden of carrying an operator's tool while improving workability.

  As described above, according to the retaining ring 40A according to the first modification described above, the retaining ring 40A can be easily attached and detached, and the workability is improved by using a highly versatile tool. It is possible to reduce the burden on the user.

  Next, a second modification of the retaining rings 40, 40A will be described with reference to FIG.

  FIG. 5 is a top view showing a retaining ring 40B according to the second modification of the embodiment described above. 5 that are the same as those in FIGS. 1 to 4 are given the same reference numerals, and detailed descriptions thereof are omitted.

  The retaining ring 40B includes a protruding portion 46 that protrudes from both ends of the cutout portion 41 toward the center of the annular portion 42, and a return portion 47 that protrudes further from the tip of the protruding portion 46 in the direction opposite to the direction in which external force is applied. And.

  With such a configuration, the same effect as that of the retaining ring 40A described above is obtained, and the return portion 47 prevents the radio pliers from being detached from the protruding portion 46 when radio pliers or the like are used. It becomes possible. As a result, it is possible to prevent damage to other parts (for example, the communication path 31 and the groove 36) due to the removal of the radio pliers. Further, since it is possible to prevent the detachment of the radio pliers, workability is also improved.

  As described above, according to the retaining ring 40B according to the second modification, while having the functions of the retaining rings 40, 40A, the retaining ring 40B can be easily attached and detached, and even if a highly versatile tool is used, It is possible to prevent detachment of the radio pliers during work, prevent damage to other parts, and improve workability.

  The present invention is not limited to the above embodiment. For example, the above-described retaining rings 40, 40A, and 40B are assumed to form the outer diameter of the retaining rings 40, 40A, and 40B by two different radii (R1, R2), but this is limited to two different radii. Instead, there may be three different radii or four different radii. That is, when the retaining ring is elastically deformed by reducing the distance in the direction in which the notch is provided from the center of the retaining ring, the outer diameter shape after elastic deformation is made circular. Any shape can be applied.

Further, the above-described retaining rings 40, 40A, 40B are formed with two different radii (R3, R4), but the elastic deformation of the annular portion 42 has a shape that can secure a predetermined deformation amount. If so, one radius or a plurality of different radii can be applied. Furthermore, although the above-described retaining rings 40, 40A, and 40B are formed by punching, they can be applied by forming them by, for example, wire-cut electric discharge machining or cutting. In addition, various modifications can be made without departing from the scope of the present invention.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] In a C-shaped retaining ring formed to be detachable in a groove provided on an inner peripheral surface of a cylindrical member,
An annular part formed from an arc having an outer periphery having a plurality of different diameters, and at least the distance from the center to the outer diameter of both ends thereof is shorter than the distance to the outer diameter in the other direction;
A retaining ring, comprising: an external force application portion provided at both ends of the annular portion and formed so that an external force can be applied in a direction in which both ends of the annular portion are brought close to each other.
[2] The retaining ring according to [1], wherein the annular portion is formed with two different diameters on the outer periphery.
[3] The retaining ring according to [1], wherein the external force application unit includes projecting portions that project from both end portions of the annular portion toward the center of the annular portion.
[4] The external force application portion further protrudes from both ends of the annular portion toward the center of the annular portion, and further protrudes from the tip of the protruding portion in a direction opposite to the direction in which the external force is applied. The retaining ring according to [1], further including a return portion.
[5] A valve case having an inlet and an outlet formed on both sides of the valve chamber, and having an opening between the inlet and the outlet.
The valve chamber is rotatably provided, and has a communication passage communicating between the inlet and the outlet in the valve chamber, and is opened and closed between the inlet and the outlet by rotational displacement. Possible ball valve,
A strainer that is inserted into and removed from the communication path through the opening, and an opening edge of the communication path is locked to the communication path;
A ball valve device with a built-in strainer, comprising: a retaining ring according to any one of [1] to [4], which is fitted in a groove provided at an opening end of the communication path and restricts movement of the strainer.

The side view which shows the partial cross section of the ball valve apparatus with a built-in strainer which concerns on one embodiment of this invention. Explanatory drawing which shows the principal part structure of the ball valve apparatus. The top view which shows the retaining ring used for the ball valve apparatus. The top view which shows the 1st modification of the retaining ring. The top view which shows the 2nd modification of the retaining ring.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Ball valve apparatus with a built-in strainer, 10 ... Valve case, 11 ... Outer shell part, 12 ... Cover part, 13 ... Valve chamber, 14 ... Inlet, 15 ... Outlet, 16 ... Inflow side piping, 17 ... Outflow side piping , 18 ... Valve insertion port, 19 ... Opening, 20 ... Lid, 21 ... Ball seat, 30 ... Ball valve, 31 ... Communication path, 32 ... Valve shaft, 33 ... Switching lever, 34 ... Strainer, 35 ... Locking , 36 ... groove, 40 ... retaining ring, 41 ... notch, 42 ... annular part, 43 ... external force application part (insertion hole), 44 ... projection part, C, C2 ... center line, D ... conventional stopper Ring, F ... Direction of water flow.

Claims (4)

In the C-shaped retaining ring formed to be detachable in a groove provided on the inner peripheral surface of the cylindrical member,
An annular part formed from an arc having an outer periphery having a plurality of different diameters, and at least the distance from the center to the outer diameter of both ends thereof is shorter than the distance to the outer diameter in the other direction;
Provided at both ends of the annular portion, and projecting from both ends of the annular portion toward the center of the annular portion, respectively, so that an external force can be applied in the direction in which both ends of the annular portion are brought close to each other A retaining ring , comprising: a protruding portion that is formed, and an external force applying portion that further includes a return portion that protrudes in a direction opposite to the direction in which the external force is applied from the tip of the protruding portion .   The retaining ring according to claim 1, wherein the annular portion is formed with two different diameters on the outer periphery. An inlet and an outlet are formed on both sides of the valve chamber, and a valve case having an opening between the inlet and the outlet;
The valve chamber is rotatably provided, and has a communication passage communicating between the inlet and the outlet in the valve chamber, and is opened and closed between the inlet and the outlet by rotational displacement. Possible ball valve,
A strainer that is inserted into and removed from the communication path through the opening, and an opening edge of the communication path is locked to the communication path;
The outer periphery is formed from a circular arc having a plurality of different diameters and is inserted into a groove provided at the opening end of the communication path, and restricts the movement of the strainer , and at least from the center to the outer diameter of both ends. An oval part formed in an oval shape whose distance is shorter than the distance to the outer diameter in the other direction, and provided at both ends of the annulus, each of the annulus part from each end of the annulus A protrusion projecting in the center direction and projecting further in the direction opposite to the direction in which the external force is applied from the projecting part formed so as to be able to apply an external force in a direction in which both ends of the annular part approach each other. And a C-shaped retaining ring including an external force application unit having a part .   The ball valve device with a built-in strainer according to claim 3, wherein the annular portion is formed with two different diameters on the outer periphery.

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