JP2011220365A - Valve device and valve state holding member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device and a valve state holding member capable of easily and compactly fixing an operation handle, even when a valve is in any state of opening or closing.SOLUTION: This valve device 1 includes a valve state holding member 9 having a substantially horseshoe-shaped base body part 91 having a pair of leg parts inserted so as to sandwich a valve rod between the operation handle and a valve body, an opening state holding part 96 fitted between a second locking wall 27 and a second locking part 53 when a valve element is an opening state and a closing state holding part 97 fitted between a first locking wall 26 and a first locking part 52 when the valve element is a closing state.

Description

  The present invention relates to a valve device that is provided in a fluid channel and opens and closes the fluid channel, and a valve state holding member that holds the open / closed state of a valve body of the valve device.

Conventionally, a piping system for flowing various fluids such as gas and liquid has been provided with a valve device as shown in FIGS. 5 (a) and 5 (b). Has been done. The valve device 10 includes a valve body 2 having a flow path through which a fluid passes, a valve body 3 provided inside the flow path of the valve body 2 for opening and closing the flow path, and one end connected to the valve body 3. A valve stem 4 and an operation handle 5 fixed to the other end of the valve stem 4 are provided.
The valve body 2 has a cylindrical portion 21 protruding on the outer surface. The cylindrical portion 21 penetrates from the outside toward the valve chamber 22, and a female screw 23 and a stepped bottom portion 24 are formed from the end of the penetrating portion.
The valve stem 4 is formed with a male screw 41, a first step portion 42, a second step portion 43, and a third step portion 44 in order from the other end, and is inserted into the tubular portion 21. The valve stem 4 is mounted with the second step portion 43 pressed by a bushing 6 screwed into a female screw 41. A thrust ring (not shown) is sandwiched between the third step portion 44 and the bottom portion 24 and between the second step portion 43 and the end face of the bushing 6, and the valve stem 4 is positioned in the tubular portion 21. However, it is supported so that rotation is possible.
The operation handle 5 is formed with a hole 51 through which the end of the valve stem is inserted. The end of the valve stem is inserted into the hole 51 and the fastening nut 8 is tightened via the spring washer 7. The first step portion 42 and the fastening nut 8 are sandwiched and fixed. Further, the operation handle 5 has a part of the outer peripheral portion cut out in a substantially arc shape with the hole 51 as the center, and a first locking portion 52 and a second locking portion 53 are formed at both ends of the cut-out portion. ing. When the valve handle is rotated by operating the operating handle, the first locking portion 52, the second locking portion 53, and a stopper that protrudes from the outer periphery of the cylindrical portion 21 and extends from the end portion are formed. The both ends (the first locking wall 26 and the second locking wall 27) of 25 are locked, so that the operation range of the operation handle is restricted.

  Such a manual valve device can reliably operate the valve body by operating the operation handle. On the other hand, when installed in a place where vibration is intense, the valve body malfunctions due to vibration. Sometimes. Further, after the operation handle is set to the open or closed state of the valve body, the operation handle may malfunction due to a person or object suddenly contacting the operation handle.

In order to solve such a problem, in Patent Document 1, an engagement member that abuts in the rotation direction of the operation handle is provided, and the engagement member is movable in a direction that is within tolerance in the rotation direction of the operation handle. There has been proposed a valve device elastically supported. According to this valve device, even if an external force is applied in the rotation direction of the operation handle, the engagement member restricts the rotation of the operation handle, so that the operation handle is prevented from malfunctioning. Further, when operating the operating handle, the engaging member is elastically deformed and retracted in a direction crossing the rotating direction of the handle, so that the ease of operation is also ensured.
However, in order to elastically support the engaging member on the valve device, it is necessary to fix the engaging member with a nut or the like. Therefore, when this engagement member is to be applied to an existing valve device, the attachment of the engagement member involves the operation of attaching and detaching the operation handle, which is cumbersome and the flow of fluid in the pipe is temporarily reduced. I have to interrupt.

  Therefore, in Patent Document 2, an engagement member that elastically switches between an engagement position that restricts the operation of the operation handle in the rotation direction and a retracted position that enables the rotation operation is provided separately from the valve device. An on-off valve locking device provided with a body has been proposed. According to this on-off valve locking device, since the on-off valve locking mechanism is provided in the existing valve device without replacing the parts of the valve device, the on-off valve locking device can be mounted in a state in which fluid flows in the pipe.

JP-A-7-198061 JP 2007-139000 A

  However, since the on-off valve locking device described in Patent Document 2 has a structure in which the device itself is provided separately from the valve device, many components are required, the structure is complicated, and the device is large. For this reason, a large space is required for installation, and it may be impossible to install in a narrow place. Further, the on-off valve locking device described in Patent Document 2 locks one state of the operation handle, and cannot lock two states of the operation handle. That is, this on-off valve locking device cannot lock both the position of the operation handle when the valve is open and the position of the operation handle when the valve is closed.

  An object of the present invention is to solve these problems and to provide a valve device and a valve state holding member capable of easily and compactly fixing an operation handle regardless of whether the valve is open or closed. And

In order to achieve the above object, the valve device of the present invention comprises:
A valve body provided in the fluid flow path of the valve body is operated by an operation handle provided at the other end of the valve rod via a valve rod having one end connected to the valve body. As a result, the fluid flow path opens and closes,
A stopper provided on the valve main body, a first locking portion provided on the operating handle and locked on a first locking wall of the stopper when the valve body is in an open state, and the operation A valve device in which an operating range of the valve body is restricted by a second locking portion that is provided on a handle for the vehicle and is locked to a second locking wall of the stopper portion when the valve body is in a closed state. ,
A substantially horseshoe-shaped base portion having a pair of legs inserted so as to sandwich the valve stem between the operating handle and the valve body;
An open state holding portion provided integrally with the base portion and fitted between the second locking wall and the second locking portion when the valve body is in an open state;
A closed state holding portion that is provided integrally with the base portion and is fitted between the first locking wall and the first locking portion when the valve body is in a closed state;
It further comprises a valve state holding member having

  In the valve device according to the present invention, it is preferable that an interval between the leg portions is smaller than an outer diameter of the valve stem, and a locking portion that is locked with the valve rod when insertion is completed is provided.

Further, the valve state holding member of the present invention,
A valve body provided in the fluid flow path of the valve body is operated by an operation handle provided at the other end of the valve rod via a valve rod having one end connected to the valve body. As a result, the fluid flow path opens and closes,
A stopper provided on the valve main body, a first locking portion provided on the operating handle and locked on a first locking wall of the stopper when the valve body is in an open state, and the operation The valve body is used in a valve device in which an operating range of the valve body is regulated by a second locking portion that is provided on a handle for locking the second locking wall of the stopper portion when the valve body is in a closed state. A valve state holding member for fixing the position of the operation handle,
A substantially horseshoe-shaped base portion having a pair of legs inserted so as to sandwich the valve stem between the operating handle and the valve body;
An open state holding portion provided integrally with the base portion and fitted between the second locking wall and the second locking portion when the valve body is in an open state;
A closed state holding portion that is provided integrally with the base portion and is fitted between the first locking wall and the first locking portion when the valve body is in a closed state;
It is characterized by having.

  In the valve state holding member according to the present invention, it is preferable that an interval between the leg portions is smaller than an outer diameter of the valve stem, and a locking portion that is locked with the valve stem when insertion is completed is provided.

  The valve device and the valve state holding member of the present invention are configured as described above, and are fitted into a gap formed between the operation handle and the stopper member when the valve is in an open state and a closed state, respectively. Since the open state holding portion and the closed state holding portion are provided, the position of the operation handle can be easily and compactly fixed in both the open and closed states of the valve.

FIG. 1 is a perspective sectional view showing a valve device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a valve state holding member according to the embodiment of the present invention. 3A is a plan view of the valve device in the open state, and FIG. 3B is a plan view of the valve device in the closed state. FIG. 4 is a cross-sectional view taken along line AA in a state where the valve state holding member is mounted. FIG. 5A is a perspective sectional view showing a conventional valve device. FIG. 5B is a plan view of a conventional valve device.

  Since the valve device 1 shown in FIG. 1 is the same as the valve device 10 of FIG. 5 except that it further includes a valve state fixing member 9, the same parts are denoted by the same reference numerals and the description thereof is omitted. .

As shown in FIG. 2, the valve state holding member 9 includes a base portion 91 and a valve state holding portion 92 formed so that a part of the outer periphery of the base portion 91 protrudes. The base portion 91 has a pair of leg portions 93 and is formed in a substantially horseshoe-shaped plate shape. The dimension between the opposing leg portions 93 is smaller than the outer diameter of the valve stem exposed between the end of the tubular portion 21 and the operation handle 5, and the inside of the base of the leg portion is the valve stem. An arcuate locking portion 94 having the same curvature as that of the outer periphery is formed. On the other hand, a tapered surface 95 is formed on the inner side of the end portion of the leg portion 93 so as to expand toward the end portion.
The valve state holding portion 92 is formed in a columnar shape having an arc-shaped cross section, is provided integrally with the base portion 91, and protrudes in the arrow A direction with respect to the base portion 91, and protrudes in the arrow B direction. And a closed state holding unit 97.

  The valve state holding member 9 is formed by injection molding or the like using a general-purpose engineering plastic such as polyacetal.

Next, a method for fixing the handle using the valve state holding member 9 will be described.
(Fixed valve open state)
(1) Valve opening operation The operation handle 5 is operated in the direction of the arrow C until the first locking portion 51 and the first locking wall 26 of the stopper 25 come into contact with each other. The valve is rotated to open (see FIG. 3A). At this time, a space A indicated by a two-dot chain line is formed between the second locking portion 53 and the second locking wall 27. In this state, the second locking portion 53 can freely move in the space A. Therefore, when an external force acts on the operation handle 5 in the direction opposite to the arrow C, the operation handle 5 closes the valve body 3. There is a risk of malfunction in the direction.

(2) Handle fixing operation Next, as shown in FIG. 4, the valve state holding member 9 is mounted by inserting the base portion 91 in the direction of the arrow between the operation handle 5 and the bushing 6. In the valve state holding member 9, the distance between the leg portions 93, 93 is slightly smaller than the outer diameter of the valve stem 4, so that the interval between the leg portions 93, 93 is elastically expanded by the valve stem 4. The insertion is completed when the locking portion 94 is locked to the valve stem 4. At this time, the valve-opening state holding part 96 is housed in the space A of FIG. 3A, thereby restricting the second locking part 53 of the operating handle 5 from moving in the direction of the space A, The operating handle 5 is fixed in the open state.

(Fixed valve body closed)
When the valve body is fixed in the closed state, the operation handle 5 is operated in the direction of arrow D until the second locking portion 53 contacts the second locking wall 27 of the stopper, and the valve is closed. Except for mounting the valve state holding member 9 so that the closed state holding portion 97 is accommodated in B (see FIG. 3B), the description is omitted because it is the same as the fixing method of the valve body in the open state.

  As described above, the valve state holding member 9 includes the open state holding portion 96 that is stored in the space A when the valve body is in the open state, and the closed state holding portion that is stored in the space B when the valve body is in the closed state. 97, and both state holding portions 96, 97 are integrally provided so as to protrude from each surface of the base portion 91, so that the open state holding portion 96 and the closed state holding are held according to the state of the valve body. By selecting one of the portions 97 and mounting it on the valve device 10, the position of the operating handle corresponding to the open / closed state of the valve body can be easily fixed with one member.

  Note that the valve device and the valve state holding member of the present invention are not limited to the above-described embodiment, and can be appropriately changed within the scope of the present invention. For example, the valve state holding member is not limited to a resin material such as general-purpose engineering plastic, but may be a metal material. In addition, the shape, size, and installation position of the stopper are different for each existing valve device, and accordingly, the shape of the space corresponding to the spaces A and B in FIG. 3 is also different for each valve device. Needless to say, the shape of the state holding portion can be changed according to the valve device.

DESCRIPTION OF SYMBOLS 1, 10: Valve apparatus 2: Valve main body 21: Cylindrical part, 22: Valve chamber, 23: Female screw, 24: Bottom part, 25: Stopper, 26: 1st locking wall, 27: 2nd locking wall 3 : Valve body 4: Valve rod 41: Male screw, 42: First step portion, 43: Second step portion, 44: Third step portion 5: Handle for operation 51: Hole, 52: First locking portion, 53 : Second locking part 6: bushing 7: spring washer 8 fastening nut 9: valve state holding member 91: base part, 92: valve state holding part, 93: leg part, 94: locking part, 95: taper part, 96: Open state holding unit, 97: Closed state holding unit

Claims (4)

A valve body provided in the fluid flow path of the valve body is operated by an operation handle provided at the other end of the valve rod via a valve rod having one end connected to the valve body. As a result, the fluid flow path opens and closes,
A stopper provided on the valve main body, a first locking portion provided on the operating handle and locked on a first locking wall of the stopper when the valve body is in an open state, and the operation A valve device in which an operating range of the valve body is restricted by a second locking portion that is provided on a handle for the vehicle and is locked to a second locking wall of the stopper portion when the valve body is in a closed state. ,
A substantially horseshoe-shaped base portion having a pair of legs inserted so as to sandwich the valve stem between the operating handle and the valve body;
An open state holding portion provided integrally with the base portion and fitted between the second locking wall and the second locking portion when the valve body is in an open state;
A closed state holding portion that is provided integrally with the base portion and is fitted between the first locking wall and the first locking portion when the valve body is in a closed state;
A valve device further comprising a valve state holding member.   2. The valve device according to claim 1, wherein an interval between the leg portions is smaller than an outer diameter of the valve stem, and a locking portion that locks the valve stem when insertion is completed is provided. A valve body provided in the fluid flow path of the valve body is operated by an operation handle provided at the other end of the valve rod via a valve rod having one end connected to the valve body. As a result, the fluid flow path opens and closes,
A stopper provided on the valve main body, a first locking portion provided on the operating handle and locked on a first locking wall of the stopper when the valve body is in an open state, and the operation The valve body is used in a valve device in which an operating range of the valve body is regulated by a second locking portion that is provided on a handle for locking the second locking wall of the stopper portion when the valve body is in a closed state. A valve state holding member for fixing the position of the operation handle,
A substantially horseshoe-shaped base portion having a pair of legs inserted so as to sandwich the valve stem between the operating handle and the valve body;
An open state holding portion provided integrally with the base portion and fitted between the second locking wall and the second locking portion when the valve body is in an open state;
A closed state holding portion that is provided integrally with the base portion and is fitted between the first locking wall and the first locking portion when the valve body is in a closed state;
The valve state holding member characterized by having.   The valve state holding member according to claim 3, wherein an interval between the leg portions is smaller than an outer diameter of the valve stem, and a locking portion that locks the valve stem when insertion is completed is provided. .

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