JP2008169947A - Strainer built-in ball valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strainer built-in ball valve device capable of removing a strainer from a ball valve element without using specific tool. <P>SOLUTION: The strainer built-in ball valve device has a pair of insertion parts 24 capable of inserting the tip of a clipping tool 29 in the inner peripheral side as a retaining ring member 22 which fixes the strainer to the ball valve element 10. Elastic deformation in the diameter contracting direction by which the retaining ring member 22 comes out of the inner surface of a through passage 9 is performed by a move on the closing side of the tip of the usual clipping tool 29 inserted from a strainer inserting/removing opening part 15 into the insertion part 24, and thereby, the strainer 17 can be attached and detached without using the specific tool. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a strainer built-in ball valve device in which a strainer is incorporated in a ball valve body.

  In the water supply system, the ball valve device itself has a structure in which a strainer is incorporated so that it is not necessary to install a strainer device in the piping path to remove foreign matters (such as dust) contained in the water (fluid). Has been done.

  Many of the ball valve devices with a built-in strainer used in such a system incorporate a bottomed cylindrical strainer into the inside of the ball valve body accommodated in the valve chamber, that is, the through passage formed in the ball valve body. The structure is used. That is, when the ball valve body is rotated in the direction of water and water (fluid) is allowed to flow from the inlet portion formed in the main body to the outlet portion, the water (fluid) passing through the through-passage is changed. A foreign substance (such as dust) is removed by a strainer.

In the strainer built-in ball valve device, the strainer is conventionally fixed to the ball valve body using a dedicated retaining ring member. For this, as disclosed in Patent Document 1, after the strainer is accommodated in the through passage while the opening end is locked to the opening edge of the through passage, on the inner surface of the opening edge of the through passage, A special-shaped retaining ring, specifically, a C-shaped retaining ring member with a locking hole at each end is locked to restrict the opening edge of the strainer and fixed so that the strainer does not come out of the ball valve body. A structure is used. In particular, in order to allow the strainer to be attached to and detached from the ball valve device without fluid leakage, in general, as disclosed in Patent Document 1, an inlet portion and an outlet portion serving as a water stop position in the body of the ball valve device. A C-shaped retaining ring member having a locking hole is formed through a strainer insertion / removal opening after a strainer insertion / removal opening is formed at a point between and the ball valve body is positioned at a water stop position. The strainer is fixed to the ball valve body, or the strainer is removed from the ball valve body.
JP 2000-46211

  Workers who maintain each part of the system carry or carry tools that are frequently used in general work in preparation for various maintenance. Then, while bringing many types of tools, the operator looks around each part to be maintained, finds a part that requires maintenance, takes out the tool, inspects it, disassembles it, and cleans the inside. And so on. Even if the tools are small one by one, there are a number of them, so the operator is forced to bear a considerable burden in terms of weight and usage of the tools. For this reason, there is a demand in the field for reducing the types of tools used by the operator as much as possible.

  However, in the case of a C-shaped retaining ring member in which a locking hole is formed, when removing the strainer from the through passage of the ball valve body, a special tool suitable for the member, that is, a locking mechanism that can be engaged with and disengaged from the locking hole. The retaining ring member cannot be removed unless a tool called a snap ring plier having a retaining protrusion at the tip is used. That is, a general tool cannot be substituted.

  For this reason, the operator is forced to carry or prepare a special tool for removing the retaining ring member in order to remove the strainer from the ball valve body.

  Therefore, an object of the present invention is to provide a strainer built-in ball valve device capable of removing the strainer from the ball valve body without using a special tool.

  In order to achieve the above object, the tip of the pinch-type tool is inserted into the retaining ring member in which the open end of the strainer is fixed to the ball valve body on the inner peripheral side. The structure with a pair of possible insertion parts is adopted, and the retaining ring member penetrates by the movement on the closing side of the tip part of a general sandwich tool inserted into the insertion part from the opening for inserting and removing the strainer The elastic deformation in the reduced diameter direction deviating from the inner surface of the road is performed.

  With this configuration, the strainer can be attached / detached from the attaching / detaching operation of the retaining ring member using a general pinch-type tool such as a radio pliers instead of a special tool.

  The invention according to claim 2 uses, as the retaining ring member, a circular retaining ring body cut out at one point on the circumference, so that the structure of the inserting portion is simple, A pair of protrusions are formed at each end of the retaining ring main body so as to protrude from the both ends toward the inside of the retaining ring main body, and the clip tool is sandwiched between the protrusion and each end of the retaining ring body. A space portion into which the tip portion was inserted was formed.

  In the third aspect of the present invention, the retaining ring member is fixed to the opening edge of the strainer so as not to hinder the movement of the retaining ring member so that the strainer can be attached and detached rationally.

  According to the first aspect of the present invention, it is possible to attach and detach the retaining ring member assembled to the ball valve body through the strainer insertion / removal opening using a general pinch tool such as radio pliers. That is, the strainer can be removed from or attached to the ball valve body by a general tool without using a special tool.

  Therefore, while maintaining the maintainability of the strainer, it can be eliminated from the burden of special tools. In addition, since no special tool is required, the cost can be reduced.

  According to the second aspect of the present invention, the insertion portion only needs to form a pair of protrusions at both ends of the retaining ring body, and a simple structure is sufficient.

  According to the third aspect of the present invention, when the retaining ring member is removed from the ball valve body, the strainer can be extracted from the ball valve body together. In addition, when the retaining ring member is fixed to the ball valve body, the strainer is also inserted into the ball valve body, so that when the strainer is maintained, the strainer can be reasonably attached and detached by a single operation.

  Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.

  FIG. 1 is a half cross-sectional view of a ball valve device with a built-in strainer, and FIG. 2 is an exploded cross-sectional view of the ball valve device around the strainer.

  1 and 2 indicate a main body of the ball valve device. The main body 1 has a valve box portion 2 having one end opened, and a cover portion 3 that closes the opening of the valve box portion 2. Among these, a valve chamber 4 is formed in the valve box portion 2. An inlet portion 5 through which fluid flows is formed on one side of the valve chamber 4, for example, on the side portion of the valve box portion 2. Further, an outlet portion 6 through which a fluid flows out is formed in the cover portion 3 on the opposite side. Note that both the inlet portion 5 and the outlet portion 6 communicate with the valve chamber 4. An inflow side pipe 7 to which a fluid, for example, water is supplied is connected to the inflow part 5, and an outflow side pipe 8 that guides the water to a predetermined place is connected to the outflow part 6. A spherical ball valve element 10 is accommodated in the valve chamber 4. Inside the ball valve body 10, a through-passage 9 for communicating between the inlet portion 5 and the outlet portion 6 is formed. From the ball valve body 10, the valve shaft 11 extends in a direction orthogonal to the flow path from the inlet portion 7 to the outlet portion 8. And the front-end | tip part of this valve shaft 11 has penetrated the valve box part 4 so that rotation is possible. A lever member 12 for switching between water flow and water stop is provided at the tip of the valve shaft 11. The ball valve body 10 is annular ball seats 13 provided on both sides of the valve chamber 6 and is held rotatably about the axis of the valve shaft 11. When the lever member 12 is directed in the water direction, The inflow port portion 7 and the outflow portion mouth portion 8 are communicated with each other through the through passage 9, and when directed in the direction of water stoppage, the through passage 9 is displaced from between the inflow portion 7 and the outflow portion mouth portion 8, and the inflow / outlet portion 7. , 8 is blocked by a solid portion 10a of the ball valve body 10. That is, the operation of the lever switches between water flow and water stop.

  On the other hand, a strainer insertion / removal port 15 (of the present application) is provided at a side portion of the valve box 2, specifically, at a point between the inlet portion 5 and the outlet portion 6 corresponding to the water stop position of the ball valve body 10. Equivalent to the strainer insertion / removal opening). Reference numeral 16 denotes a lid that removably closes the opening of the strainer insertion / removal port 15. A strainer 17 is accommodated in the through-passage 9 of the ball valve body 10 through the strainer insertion / removal port 15 as shown in FIG.

  That is, as shown in FIG. 2, the strainer 17 has a structure including, for example, a circular flange portion 18 and a bottomed cylindrical mesh portion 19 for removing foreign matter attached to the inner peripheral portion of the flange portion 18. Used. The strainer 17 is inserted into the through-passage 9 at the water stop position through the strainer insertion / removal port 15 until it abuts against the stepped portion 20 formed at the opening end of the through-passage 9. A ring-shaped locking groove 21 is formed on the inner surface of the opening end side by side with the stepped portion 20 in the through passage 9, and a retaining ring member 22 is fitted (engaged) into the locking groove 21. The flange portion 18 of the strainer 17 (corresponding to the opening edge portion of the present application) is regulated so that the strainer 17 does not come out of the through passage 9.

For the retaining ring member 22 used for fixing the strainer 17, a part that can be operated with a general pinching tool such as a radio pliers 29 shown in FIGS. 4 and 5 is used. For the retaining ring member 22, a part formed in a ring shape, for example, from spring steel or punching of a steel plate as shown in FIG. 3 is used. That is, the retaining ring member 22 includes a circular retaining ring body 23 having a notch at one point on the circumference, and tool end insertion portions 24 formed at both ends of the retaining ring body 23. It has a structure. Each of the insertion portions 24 has a pair of parallel projecting pieces 25 (corresponding to the projecting portions for tool application of the present application) that can be sandwiched between the both ends of the retaining ring main body 23 with the sandwiched tool end. The formed structure is used. Each of the projecting pieces 25 is configured by projecting a short piece portion from both ends of the retaining ring main body 23 toward the inside of the main body 23 in parallel. With this structure, the working portion 28 for engaging and disengaging the retaining ring, such as inserting the tip end of the radio pliers 29 into both ends of the retaining ring main body 23 or sandwiching the protruding piece 25 (space of the present application). Equivalent to the part). Thus, the retaining ring member 22 is simply inserted into each working portion 28 by inserting a general pinching tool end, here, the tip end of the radio pliers 29, and moving it to the closing side. As shown in FIG. 4, the retaining ring body 23 is elastically deformed in the direction of reducing the diameter. Using this elastic deformation, the retaining ring member 22 is fitted into the locking groove 21 by a tool operation from the outside of the valve box portion 2, and the strainer 17 is fixed to the ball valve body 10 as shown in FIG. Next, the operation of the ball valve device configured as described above will be described.

  Now, it is assumed that a ball valve device is installed in the piping path, and the ball valve device is switched to the water flow side by lever operation. At this time, the through passage 9 of the ball valve body 10 is positioned in a direction in which the inlet portion 5 and the outlet portion 6 communicate with each other as shown in FIG.

  Thereby, the water (fluid) flowing in from the inflow side pipe 7 flows out to the outflow part 6 through the through passage 9 and reaches the outflow side pipe 8. When the water passes through the through passage 9, foreign matters (such as dust) contained in the water are removed by the strainer 17 installed in the through passage 9.

  It is assumed that such foreign matter removal continues and maintenance time comes, and maintenance such as cleaning of the strainer 17 becomes necessary. At this time, an operator having various tools goes to the site. Then, at the site, first, the lever member 12 is operated to switch the ball valve body 10 from the water passing position to the water stopping position. Subsequently, the lid 16 is removed from the water-stopped state, and the strainer insertion / extraction port 15 is opened as shown in FIG. Thereafter, the operator selects a pinch-shaped tool, for example, a radio pliers 29 having a thin tip from among general tools held as shown in FIGS. 4 and 5, and the pliers 29 are inserted into the open strainer. The inside of the removal port 15 is inserted. Subsequently, the distal end portion of the pliers 29 is inserted into the working portion 28 at each distal end of the retaining ring member 22. Thereafter, when the radio pliers 29 are operated to the closing side, the pair of projecting pieces 25 are sandwiched. Thus, as shown by the two-dot chain line in FIG. 3, the pair of projecting pieces 25 are displaced in a direction approaching each other. Due to this displacement, the retaining ring member 22 is deformed in a direction in which the diameter is reduced, and comes out of the locking groove 21 of the ball valve body 10. By this operation, the retaining ring member 22 is removed from the ball valve body 10.

  Thereby, the fixation of the strainer 17 is released. Therefore, the strainer 17 may be pulled out from the ball valve body 10 and maintenance work, for example, the strainer 17 may be inspected or cleaned (an operation to remove attached foreign matter).

  When the strainer 17 is returned after the maintenance is completed, the retaining ring member 22, which is deformed to the reduction side by the radio pliers 29 after the strainer 17 is accommodated in the through passage 9 of the ball valve body 10, is locked. Then, the strainer 17 is fixed to the ball valve body 10 again when fitted into the locking groove 21. Thereafter, when the strainer insertion / removal port 15 is closed with the lid 16, the original state is restored. And what is necessary is just to return to water flow mode by lever operation again.

  In this manner, the strainer 17 can be detached from the ball valve body 10 by removing the retaining ring member 22 using a general pinch-type tool such as the radio pliers 29. That is, the strainer 17 can be removed from or attached to the ball valve body 10 only by the work with the general pinching tool 29 without using a special tool such as a snap ring plier.

  Therefore, the operator can eliminate the burden of the special tool while maintaining the maintainability of the strainer 17 as it is. In addition, a special tool is not required, and a general tool is used instead. Therefore, the cost can be reduced.

  FIG. 6 shows a second embodiment of the present invention.

  In the present embodiment, a sub-projection piece 25 a that extends from the same end toward the inner peripheral side adjacent to the retaining ring main body 23 is integrally formed at each tip of the pair of protrusions 25 to surround the periphery of the working unit 28. It has a protruding piece shape.

  With such a projecting piece shape, the projecting piece 25 and the sub projecting piece portion 25a regulate the tip of the tool inserted into the working unit 28 from the surroundings, so that the projecting piece 25 is sandwiched by the radio pliers 29 (general pinching tool). At this time, it is possible to prevent the radio pliers 29 from falling out of the retaining ring member 22 or sliding down.

  7 (a) and 7 (b) show a third embodiment of the present invention.

  In the present embodiment, the retaining ring member 22 is fixed to the opening edge of the strainer 17 without disturbing the movement of the retaining ring member 22. For example, in the same fixing, the retaining ring member 22 is overlapped on the front surface of the flange portion 18 and a part of the retaining ring member 22, for example, a position where the projecting piece 25 indicated by symbol S in FIG. A structure in which only the point of the retaining ring main body 23 on the opposite side is joined by welding or rivets, and the retaining ring member 22 is integrated with the strainer 17 is used.

  With such a configuration, when the retaining ring member 22 is removed from the ball valve body 10, the strainer 17 can also be extracted from the ball valve body 10, and also when the retaining ring member 22 is fixed to the ball valve body 10, The strainer 17 is also inserted into the ball valve body 10 together. That is, when the strainer 17 is maintained, there is an advantage that the strainer 17 can be attached and detached rationally in one operation.

  Needless to say, the retaining ring member having the sub-projections shown in the second embodiment may be fixed to the strainer.

  However, in the second and third embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

Note that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention.

1 is a half sectional view showing a strainer built-in ball valve device according to a first embodiment of the present invention. Sectional drawing which decomposed | disassembled the strainer periphery of the ball valve apparatus. The perspective view which shows the external appearance of the retaining ring member which fixes a strainer. Sectional drawing explaining when fixation of a strainer is cancelled | released with a general pinch-shaped tool. Similarly perspective view. The front view of the retaining ring member used as the principal part of the 2nd Embodiment of this invention. The figure which shows the external appearance with which the strainer used as the principal part of the 3rd Embodiment of this invention and the retaining ring member were united.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Main body, 4 ... Valve chamber, 5 ... Inlet part, 6 ... Outlet part, 9 ... Through passage, 10 ... Ball valve body, 15 ... Strainer insertion / extraction opening part (strainer insertion / removal opening part), 17 ... Strainer, 22 ... Retaining ring member, 23 ... Retaining ring body, 24 ... Insertion part, 25 ... Projection piece, 28 ... Working part (space part) 29 ... Radio pliers (general pinching tool).

Claims (3)

A main body in which an inlet portion and an outlet portion are formed on both sides of the valve chamber, and a strainer insertion / removal opening is formed between the inlet portion and the outlet portion,
The valve chamber is rotatably accommodated, and has a through-passage that communicates between the inlet portion and the outlet portion inside, and passes between the inlet portion and the outlet portion by rotational displacement. A ball valve body capable of switching between water and still water;
A strainer that is inserted into and removed from the through passage through the strainer insertion opening, and is received in the through passage while the opening edge is locked to the opening end of the through passage;
A ball valve device with a built-in strainer, which includes a retaining ring member that engages with an inner surface of an opening end portion of the through passage, regulates an opening edge portion of the strainer, and fixes the strainer so as not to come out. There,
The retaining ring member has, on the inner peripheral side, a pair of sandwiching tool tip insertion parts into which the tip part of a general sandwiching tool can be inserted,
The movement on the closing side of the front end portion of the pinch-shaped tool inserted into the insertion portion through the strainer insertion / removal opening portion causes elastic deformation in the reduced diameter direction in which the retaining ring member is detached from the inner surface of the through passage. A ball valve device with a built-in strainer, characterized by being configured. The retaining ring member has a circular retaining ring body cut out at one point on the circumference,
The insertion portion is formed with a pair of protrusions at both ends of the retaining ring main body so as to protrude from the both ends toward the inside of the retaining ring body, and the protrusion and each end of the retaining ring body. The ball valve device with a built-in strainer according to claim 1, wherein a space portion into which a tip portion of the pinch-shaped tool is inserted is formed.   Furthermore, the said retaining ring member is fixed to the opening edge part of the said strainer so that a movement of a retaining ring member may not be prevented, The ball valve apparatus with a built-in strainer of Claim 1 or Claim 2 characterized by the above-mentioned.

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