JP2007139000A - Switching valve locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching valve locking device capable of preventing a malfunction of a rotation of a rotational operating member without exchanging the parts or the like in the switching valve of ready made ball valves or the like. <P>SOLUTION: The switching valve locking device 1 have a base mount 2 detachable to the switching valve 100, an engaging position which disapproves movement of a rotation operating member 102 by engaging the rotation operating member 102, while elastically projecting inside the pivoting channel of the rotation operating member 102 of the switching valve 100, a retired line of position which approves the rotation of the rotation operating member 102 after retiring from the pivoting channel of the rotation operating member 102, an engaged member 10 whose space is freely movable and a holding means 20, being fixed to the base mount 2, which holds the engaging member 10 freely movably between the engaging position and the retiring position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a locking device for an on-off valve such as a ball valve having a lever-like handle that is a rotation operation member.

  In the piping systems of various equipment and devices, a lever-like handle arranged on the upper side of the valve sleeve, that is, a valve body in the valve sleeve is rotated through the valve shaft by the lever handle, An open / close valve such as a ball valve for adjusting the flow rate or shutting off or flowing the fluid (liquid, vapor, compressed air, etc.) is mounted.

  If the on-off valve is installed in a place with a lot of vibration, the lever handle may turn naturally due to vibration, and there is a problem that the on-off state of the on-off valve changes. In particular, when the on-off valve is mounted horizontally or vertically, or when the pressing force of the spring washer decreases due to long-term use, the lever handle can be rotated easily, and immediate measures are required. It becomes.

  In addition to the vibration, the lever handle may turn due to careless contact with a human body or the like depending on the installation location of the on-off valve. That is, the operation (open or closed) state of the on-off valve may be switched erroneously.

  Therefore, for example, a valve body arranged in the valve sleeve, that is, a rotary operation key is detachably fitted to the rotary valve, the rotary valve is rotated, and the key is extracted at the valve closed position or the valve open position. Prevention of rotation of the rotary valve is performed. Alternatively, a rotary operation lever of the rotary valve is locked to a valve sleeve or the like with a bolt or a key.

  However, it may be extremely difficult to incorporate a new lock mechanism into an existing on-off valve, and there is also an economical problem.

Therefore, Patent Document 1 discloses a lock device that prevents the rotation of the rotary valve by attaching a lock member to the rotation operation lever and locking the lock portion of the lock member against the valve sleeve or the like. ing.
JP-A-4-217881

  As described above, by using an open / close valve such as a ball valve, the rotation operation lever is locked to the valve sleeve or the like with a bolt or a key, or as described in Patent Document 1, a lock member is attached to the rotation operation lever. When changing to a method such as attaching and locking the lock part of the lock member to the valve sleeve or the like, it is necessary to replace the valve or parts of the valve, etc. It is necessary to exchange after stopping etc. Such replacement work is complicated and causes economic loss due to the suspension of operation.

  Therefore, the present invention solves the above-described problems, and in an existing on-off valve such as a ball valve, it is possible to prevent a malfunction of the rotation of the rotary operation member without replacing its parts. It is to provide a valve locking device.

The above object is achieved by the on-off valve locking device according to the present invention. In summary, the present invention is an on-off valve locking device provided with a rotary operation member that rotates between an open position and a closed position,
A base that can be attached to and detached from the on-off valve or a piping system in which the on-off valve is installed;
An engagement position of the opening / closing valve that elastically protrudes into the rotation path of the rotation operation member and engages with the rotation operation member so that the rotation operation member cannot be moved, and the rotation of the rotation operation member. An engaging member that is movable between a retracted position that is retracted from the moving path and that allows the rotation operation member to rotate.
Holding means attached to the base and holding the engaging member movably between the engaging position and the retracted position;
It is an on-off valve locking device characterized by having.

According to an embodiment of the present invention, the holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube;
The engaging member is constituted by a part of the wall of the inner tube and elastically protrudes outward from the opening formed in the outer tube.

  According to another embodiment of the present invention, the engaging member is formed by cutting and raising a part of the wall of the inner tube outward from the inner tube, and has one end connected to the wall of the inner tube. The other end separated from the wall of the inner tube protrudes outward from the opening of the outer tube.

According to another embodiment of the present invention, the holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube, and forming an opening at a position corresponding to the opening of the outer tube of the inner tube;
The engagement member is disposed in conformity with the opening of the inner tube, and one end of the engagement member is swingably attached to the wall surface of the inner tube with a hinge, and a spring member is disposed on the other end. Concatenated,
The other end elastically protrudes outward from the opening formed in the outer tube and the inner tube by the biasing force of the spring member.

According to an embodiment of the present invention, the holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube, and forming an opening at a position corresponding to the opening of the outer tube of the inner tube;
The engaging member is disposed in conformity with the opening of the inner tube, and one end of the engaging member is attached to the wall surface of the inner tube so as to be swingable by a U-shaped leaf spring member,
With the urging force of the leaf spring member, the other end is elastically projected outward from the opening formed in the outer tube and the inner tube.

According to the present invention,
(1) By disposing an engaging member such as an elastically supported stopper member adjacent to a rotation operation member such as a lever-like handle, the rotation of the rotation operation member due to vibration or the like can be prevented. Furthermore,
(2) When rotating the rotation operation member, the elastically supported engagement member can be retracted to a retracted position where rotation is enabled by the rotational force of the rotation operation member. An erroneous operation rotation of the rotation operation member due to contact can be reliably prevented. Also,
(3) The ease of operation of the rotating operation member can be ensured.
Such effects can be achieved.

  Hereinafter, the on-off valve locking device according to the present invention will be described in more detail with reference to the drawings.

Example 1
1 to 3 show an embodiment of the on-off valve locking device 1 according to the present invention.

  The on-off valve 100 is installed in a piping system 101 connected to various devices and apparatuses, and includes a lever-like handle (hereinafter simply referred to as “lever handle”) 102 as a rotation operation member. The lever handle 102 is perpendicular to the piping system 101, closed in the horizontal position in FIG. 1 (solid line position in FIG. 1), and downward along the piping system 101 in FIG. 2. A rotary valve (not shown) in the valve sleeve can be rotated to an open position (solid line position in FIG. 2) arranged extending vertically, and the lever handle 102 is operated to operate a valve shaft 103. ) To control opening and closing.

  In this embodiment, the locking device 1 for the on-off valve 100 locks the lever handle 102 in the horizontal position shown in FIG. 1, that is, the on-off valve 100 in the closed position. Of course, the horizontal position may be the open position of the on-off valve 100.

  The on-off valve locking device 1 of this embodiment has a base 2 that can be attached to and detached from the on-off valve 100 or a piping system 101 in which the on-off valve 100 is installed. In this embodiment, the base 2 is a rectangular metal plate such as a steel plate, but is not limited thereto.

  As can be understood with reference to FIGS. 1 and 3, in this embodiment, U-shaped stoppers whose ends are screw shafts 3 a, that is, U-shaped bolts 3, are connected upstream and downstream of the on-off valve 100. It is attached to the piping system 101 on the side, and the both-end screw shaft 3a is passed through the mounting hole 2a formed in the base 2. Then, the nut 5 is screwed onto the screw shaft 3a of the U-shaped bolt 3 via the washer 4, and the base 2 is fixed to the piping system 101 in which the on-off valve 100 is installed by bolting.

  The on-off valve locking device 1 of this embodiment includes an engaging member that engages with the lever handle 102, that is, a stopper member 10. The stopper member 10 has an elongated shape, and as shown in FIGS. 1 and 4, the other end (upper end) 12 rotates the lever handle 102 of the on-off valve 100 with the one end (lower end) 11 as a swing center. From the engagement position where the lever handle 102 is elastically protruded and engaged with the lever handle 102 and the lever handle 102 cannot be moved, and from the rotation path of the lever handle 102 as shown by a one-dot chain line in FIG. It is possible to move between a retracted position that allows the lever handle 102 to move backward.

  According to the present embodiment, the stopper member 10 is held swingably by the holding means 20. The holding means 20 is a double-pipe structure of an outer tube 21 and an inner tube 22 that is arranged extending in parallel to the piping system 101. The outer tube 21 and the inner tube 22 are fixedly fitted by being bonded with an adhesive or by press-fitting. The outer tube 21 and the inner tube 22 can be made of metal, resin, and other various materials.

  Similar to the U-shaped bolt 3, the holding means 20 having a double-pipe structure is attached to the base 2 using U-shaped stoppers whose ends are screw shafts 23 a, that is, U-shaped bolts 23. It is attached. That is, the U-shaped bolt 23 is attached to one end (lower end) 20a and the other end (upper end) 20b of the double-pipe structure that is the holding means 20, and the mounting hole 2b in which the both-end screw shaft 23a is formed in the base 2 is provided. And the nut 25 is screwed onto the screw shaft 23 a of the U-bolt 23 via the washer 24 to fix the holding means 20 to the base 2. At this time, an adjusting member 30 for adjusting the height of the holding means 20 from the base 2 is arranged between the base 2 and the holding means 20. The adjustment member 30 is a U-shaped base plate in the present embodiment, but is not limited to this shape, and may have various shapes. The adjustment member 30 is fixed to the base 2 by welding or bolting. By the adjustment member 30, the outer peripheral surface of the outer tube 21 of the holding member 20 is arranged so as to be positioned close to the rotation path of the lever handle 102.

  As can be understood with reference to FIG. 3, the outer tube 21 constituting the holding means 20 is formed with an elongated opening 26 extending along the longitudinal axis direction.

  According to the present embodiment, the wall portion of the inner tube 22 at the position corresponding to the opening 26 of the outer tube 21 is used as the stopper member 10.

  That is, in the present embodiment, at least the inner tube 22 is a resin tube, and for example, a vinyl chloride resin tube can be suitably used. As shown in FIG. 3, the inner tube 22 has cuts 10 a and 10 b in a predetermined length from the upper side to the lower side with a predetermined width along the longitudinal axis direction. Then, the lower end portion 11 of the inner tube wall member having a rectangular shape that is still connected to the wall of the inner tube 22 is slowly cut and raised while being heated, and the upper end portion 12 is opened to the opening of the outer tube 21. The stopper member 10 is formed by projecting outward from the portion 26 and deforming. An opening 16 is formed in the inner tube 22 after the stopper member 10 is cut and raised.

  The protrusion amount of the upper end 12 of the stopper member 10 is such that the lever handle 102 cannot be moved downward by engaging with the lever handle 102 rotated to the horizontal position while protruding outward. Is done. Further, the outward protrusion of the stopper member 10 is limited by the region in the vicinity of the lower end 11 of the stopper member 10 coming into contact with the opening 26 of the outer tube 21, and the fatigue breakage of the stopper member 10 is prevented.

  In addition, the stopper member 10 formed on the wall portion of the resin inner pipe 22 has the lever handle 102 rotated clockwise from the state of extending downward in FIG. 2 to the upper horizontal position. When moving, the lever handle 102 can be pushed into the opening 26 of the outer tube 21 (and also the opening 16 of the inner tube 22), that is, elastically moved to the retracted position.

  In other words, the stopper member 10 is held between the engaging position where the end 11 is swingably held by the holding means 20 and the lever handle 102 is prevented from rotating and the retracted position where the lever handle 102 is allowed to rotate. It is possible to move (swing) freely.

  The stopper member 10 engages with the lower surface of the lever handle 102 and can reliably prevent the lever handle 102 from moving downward. Even if the lever handle 102 moves slightly upward due to vibration or the like, the stopper member 10 is elastically biased to the protruding position, so that the stopper member 10 does not return to the retracted position. Absent. In other words, it is possible to reliably prevent an erroneous operation of the rotation operation member, that is, the lever handle 102 due to vibration or contact.

  That is, due to the large opposing force of the stopper member 10 at the initial stage of the rotation of the lever handle 102, the lever handle 102 is naturally rotated due to vibration or the like, and the rotation by contact with a human body other than the operation of the lever handle 102 is also ensured. Can be prevented.

  According to the present embodiment, as described above, the double tube structure is used as the holding means 20 of the stopper member 10, so that the stopper member 10 is pushed down by the lever handle 102 and the lever handle 102 can be rotated. After being moved to the position, when the lever handle 102 reaches the stop position and the pressing action on the stopper member 10 is finished, the stopper member 10 is elastically returned to the lever handle rotation prevention engagement position. At this time, the stopper member 10 collides with the wall of the outer tube 21, that is, the lower end portion of the opening 26, and emits a sound. The impact sound of the stopper member 10 against the outer tube 21 resonates inside the double-pipe structure and becomes a sound that can be clearly heard by the handle operator, indicating that the lever handle 102 has been locked by the locking device 1. It is extremely preferable in terms of work.

  On the other hand, when the lever handle 102 held in the closed position by the stopper member 10 is rotated counterclockwise to the open position, the operator pushes the stopper member 10 into the opening 26 of the outer tube 21 by hand. Then, the lever handle 102 may be pushed downward while releasing the downward movement prevention of the lever handle 102.

  When the opening / closing valve 100 is opened / closed, the locking device 1 of this embodiment can easily rotate the handle lever 102 by retracting the stopper member 10 in the elastically supported direction. The ease of operation of the handle 102 can be ensured.

As described above, according to the on-off valve locking device 1 of the present embodiment having the above-described configuration,
(1) By disposing the elastically supported stopper member (engagement member) 10 adjacent to the rotation operation member such as the lever handle 102, rotation of the rotation operation member due to vibration or the like can be prevented. Furthermore,
(2) When rotating the rotation operation member, the elastically supported stopper member can be retracted to a retracted position where rotation is allowed by the rotational force of the rotation operation member. It is possible to reliably prevent erroneous operation rotation of the rotation operation member. Also,
(3) The ease of operation of the rotating operation member can be ensured.
Such effects can be achieved.

Example 2
In the first embodiment, the stopper member 10 cuts the wall of the inner tube 21 by a predetermined length from the upper side to the lower side with a predetermined width along the longitudinal axis direction. The description has been made assuming that the inner tube 22 is integrally connected.

  The present invention is not limited to such a configuration. In the present embodiment, as shown in FIG. 5, the stopper member 10 cuts off the wall portion of the inner tube 22 to form another member, and the lower end portion 11 is attached to the inner tube 22 with a hinge 13 so as to be swingable. A spring member 14 is provided at the upper end 12. The stopper member 10 may be a part of the cut out inner tube 22 or may be a member produced separately.

  On the other hand, the opening 16 is formed in the inner tube 22 by cutting off the stopper member 10. The opening 16 is a position corresponding to the opening 26 formed in the outer tube 21.

  Therefore, the upper end 12 of the stopper member 10 is usually from the opening 15 of the inner tube 22 and further from the opening 26 of the outer tube 21 by the biasing force of the spring member 14 as in the case of the first embodiment. It protrudes outward.

  As a modified embodiment, as shown in FIG. 6, a leaf spring member 15 such as a phosphor bronze plate formed in a “<” shape may be used instead of the hinge 13. In this case, the spring member 14 can be omitted, and the structure becomes simpler.

  In the present embodiment and the modified embodiment, the same effects as those of the first embodiment can be achieved.

It is a perspective view explaining composition of one example of an on-off valve locking device concerning the present invention, and shows a state where a lever handle is in a closed position. It is a perspective view explaining composition of one example of an on-off valve locking device concerning the present invention, and shows a state where a lever handle moves from an open position to a closed position. It is a disassembled perspective view of the on-off valve locking device according to the present invention. It is sectional drawing for demonstrating the structure of a double pipe structure and a stopper member. It is sectional drawing explaining the other Example of the stopper member of the on-off valve locking device which concerns on this invention. It is sectional drawing explaining the other Example of the stopper member of the on-off valve locking device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 On-off valve locking device 2 Base 3, 23 U-shaped bolt 10 Stopper member 13 Hinge 14 Spring member 15 U-shaped leaf spring member 16 Inner tube opening 20 Double tube structure (holding means)
21 Outer pipe 22 Inner pipe 26 Outer pipe opening 100 On-off valve 101 Piping system 102 Lever-shaped handle

Claims (5)

An on-off valve locking device having a rotation operation member that rotates between an open position and a closed position,
A base that can be attached to and detached from the on-off valve or a piping system in which the on-off valve is installed;
An engagement position of the opening / closing valve that elastically protrudes into the rotation path of the rotation operation member and engages with the rotation operation member so that the rotation operation member cannot be moved, and the rotation of the rotation operation member. An engaging member that is movable between a retracted position that is retracted from the moving path and that allows the rotation operation member to rotate.
Holding means attached to the base and holding the engaging member movably between the engaging position and the retracted position;
And an on-off valve locking device. The holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube;
The engaging member is constituted by a part of the wall of the inner tube and elastically protrudes outward from the opening formed in the outer tube.
The on-off valve locking device according to claim 1.   The engaging member is formed by cutting and raising a part of the wall of the inner tube outward from the inner tube, and is elastically swingable around one end connected to the wall of the inner tube. 3. The on-off valve locking device according to claim 2, wherein the other end separated from the wall of the inner tube protrudes outward from the opening of the outer tube. The holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube, and forming an opening at a position corresponding to the opening of the outer tube of the inner tube;
The engagement member is disposed in conformity with the opening of the inner tube, and one end of the engagement member is swingably attached to the wall surface of the inner tube with a hinge, and a spring member is disposed on the other end. Concatenated,
With the biasing force of the spring member, the other end elastically protrudes outward from the opening formed in the outer tube and the inner tube.
The on-off valve locking device according to claim 1. The holding means is a double tube structure in which an outer tube and an inner tube are fixedly fitted,
Forming an opening in the wall of the outer tube, and forming an opening at a position corresponding to the opening of the outer tube of the inner tube;
The engaging member is disposed in conformity with the opening of the inner tube, and one end of the engaging member is attached to the wall surface of the inner tube so as to be swingable by a U-shaped leaf spring member,
With the urging force of the leaf spring member, the other end elastically protrudes outward from the opening formed in the outer tube and the inner tube.
The on-off valve locking device according to claim 1.

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