JP2008039144A - Flow regulating valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow regulating valve, capable of preventing erroneous rotation of a flow regulating knob while facilitating the adjustment of the flow regulating knob. <P>SOLUTION: The flow regulating valve 1 comprises a housing 3 provided in the middle of a flow passage 2 and having a conduit 31 connected with the flow passage 2 and a valve hole 32 provided in the inner part thereof; a throttle valve 4 capable of protruding to and retreating from the valve hole 32; and the flow regulating knob 5 connected to the base end of the throttle valve 4 and screwed to a mount part 33 protruded coaxially with the valve hole 32. A rotation prevention means 6 which prevents erroneous rotation of the knob 5 in an adjacent state to the knob 5 and permits rotating operation of the knob 5 in a separated state from the knob 5 is provided on the outer circumference of the mount part 33 of the housing 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flow control valve.

Generally, a flow rate adjusting valve is widely used as a means for adjusting the flow rate of a fluid such as gas or liquid. The flow rate adjusting valve is provided in the middle of the flow path, and has a housing having a valve hole therein, a throttle valve that can move forward and backward with respect to the valve hole, and a base end of the throttle valve. A flow rate adjustment knob screwed to the valve hole and a mounting portion protruding coaxially, and a lock nut for preventing loosening screwed to the flow rate adjustment knob on the upper surface of the mounting portion, screwing the flow rate adjustment knob A structure is known in which the distance between the valve hole and the throttle valve is adjusted according to the amount to adjust the flow rate of the fluid flowing through the flow path (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2001-141090 (paragraph numbers 0016, 0017, FIG. 1)

  However, the conventional control valve described in Japanese Patent Application Laid-Open No. 2001-141090 has a problem that adjustment is required because the lock nut needs to be tightened after the flow rate adjustment knob is operated. Further, when the lock nut is tightened or the lock nut is loosened, there is a problem that both the flow rate adjusting knobs rotate accidentally and the adjustment amount changes. In particular, when a plurality of flow control valves are installed in series or in a narrow place, finger tightening and loosening operations are difficult. Therefore, it is necessary to adjust using a tool such as pliers, but using a tool such as pliers is not preferable because it causes breakage. Further, since the flow rate adjustment knob is exposed, there is also a problem that the flow rate adjustment knob is erroneously rotated due to the carelessness of the operator and the flow rate adjustment is incorrect.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a flow rate adjustment valve that facilitates adjustment of the flow rate adjustment knob and prevents erroneous rotation of the flow rate adjustment knob.

  In order to solve the above-mentioned problem, a flow control valve according to claim 1 is provided in the middle of a flow path, has a pipe line communicating with the flow path, and has a valve hole therein, and the valve A throttle valve that is movable back and forth with respect to the hole, and a flow rate adjusting knob that is connected to a base end of the throttle valve and is screwed to a mounting portion that protrudes coaxially with the valve hole of the housing. In the control valve, on the outer periphery of the mounting part of the housing, the rotation that prevents the flow rate adjustment knob from rotating erroneously in the state close to the flow rate adjustment knob and enables the flow rate adjustment knob to be rotated away from the flow rate adjustment knob. A prevention means is provided.

  With this configuration, it is possible to adjust the flow rate by operating the flow control knob in a state in which the rotation prevention means is separated from the flow control knob, and by bringing the rotation prevention means close to the flow control knob, Rotation can be prevented.

  According to a second aspect of the present invention, in the flow rate adjusting valve according to the first aspect, a locking groove is provided on the outer periphery of the mounting portion of the housing, and the rotation preventing means covers the outside of the flow rate adjusting knob. A cylindrical portion, and an elastically deformable locking protrusion protruding inward from the lower end of the cylindrical portion, and the locking protrusion is formed to be slidable on the outer periphery of the mounting portion of the housing In addition, it is formed so as to be engageable with the locking groove.

  With this configuration, by engaging the locking protrusion of the rotation preventing means with the locking groove provided on the outer periphery of the mounting portion of the housing, the cylindrical portion of the rotation preventing means causes the outside of the flow rate adjustment knob to be moved outward. Can be covered. In addition, by forming the locking projection slidably on the outer periphery of the mounting portion of the housing, it is possible to adjust the flow rate by rotating the flow rate adjusting knob by moving the rotation preventing means away from the flow rate adjusting knob. .

  According to a third aspect of the present invention, in the flow rate adjusting valve according to the first aspect, a plurality of locking grooves and a vertical connection from the locking grooves are provided on a concentric circle on the outer periphery of the mounting portion of the housing. A vertical groove extending from the upper part to the lower part of the attachment part is provided, and the rotation preventing means protrudes inward from the cylindrical part covering the outside of the flow rate adjusting knob and the lower end part of the cylindrical part. A locking protrusion, and the locking protrusion is formed to be slidable in the longitudinal groove and to be engageable with the locking groove.

  With this configuration, the locking protrusion of the rotation preventing means is slid in the vertical groove, the rotation preventing means is rotated along the locking groove at the upper end of the vertical groove, and the locking protrusion is turned into the locking groove. By engaging, the outside of the flow rate adjusting knob can be covered by the cylindrical portion of the rotation preventing means. Further, it is possible to adjust the flow rate by rotating the flow rate adjusting knob by sliding the locking projection in the vertical groove and moving the rotation preventing means away from the flow rate adjusting knob.

  According to a fourth aspect of the present invention, in the flow control valve according to the first aspect, when the rotation preventing means is pivotably attached to the outer periphery of the mounting portion of the housing so as to be able to be tilted, A spring member that urges an elastic force capable of fixing the stopper in an upright state, and an anti-rotation body that is attached to the free end of the stopper and engages with the flow rate adjustment knob when the stopper is in the upright state. It is characterized by becoming.

  By configuring in this way, the stopper is fixed in an upright state by the elastic force of the spring member, and the rotation prevention body mounted on the stopper is engaged with the flow rate adjustment knob to prevent erroneous rotation of the flow rate adjustment knob. be able to. Further, the flow rate can be adjusted by rotating the flow rate adjusting knob in a state where the rotation preventing body of the stopper is separated from the flow rate adjusting knob against the elastic force of the spring member.

  Since the present invention is configured as described above, the following effects can be obtained.

  (1) According to the first aspect of the present invention, the flow rate knob can be operated in a state in which the rotation prevention means is separated from the flow rate adjustment knob. Since erroneous rotation can be prevented, the flow rate adjustment knob can be easily adjusted, and erroneous rotation of the flow rate adjustment knob can be reliably prevented.

  (2) According to the invention described in claim 2, since the outside of the flow rate adjustment knob can be covered by the cylindrical portion by engaging the locking projection with the locking groove, in addition to the above (1), Further, erroneous rotation of the flow rate adjusting knob can be reliably prevented.

  (3) According to the invention described in claim 3, the locking projection is slid along the vertical groove, and the rotation preventing means is rotated along the locking groove at the upper end of the vertical groove so that the locking projection is Since it can engage with the locking groove, in addition to the above (1), it is possible to reliably prevent erroneous rotation of the flow rate adjusting knob.

  (4) According to the invention of claim 4, the stopper is fixed in an upright state by the elastic force of the spring member, and the anti-rotation body mounted on the stopper is engaged with the flow rate adjusting knob to Since erroneous rotation can be prevented, in addition to (1) above, erroneous rotation of the flow rate adjusting knob can be reliably prevented.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best embodiment of the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
FIG. 1 is a cross-sectional view showing a first embodiment of a flow regulating valve according to the present invention, and FIG. 2 is a perspective view showing a first embodiment of a fluid regulating valve according to the present invention.

  As shown in FIG. 1, the flow rate control valve 1 is provided in the middle of a flow path 2 indicated by a two-dot chain line, and has a pipe line 31 communicating with the flow path 2 and a valve hole 32 inside. 3, a throttle valve 4 that can move forward and backward with respect to the valve hole 32, and a flow rate that is coupled to the base end of the throttle valve 4 and screwed into a mounting portion 33 that protrudes coaxially with the valve hole 32 of the housing 3. The control knob 5 is provided on the outer periphery of the mounting portion 33 of the housing 3 to prevent the flow control knob 5 from rotating erroneously in the vicinity of the flow control knob 5 and away from the flow control knob 5. The rotation prevention means 6 which enables the rotation operation of 5 is mainly comprised.

  As shown in FIGS. 1 and 2, the housing 3 is formed in a substantially cylindrical shape. The housing 3 faces and communicates with a pipe line 31 on the outer periphery of the lower part, and a valve hole 32 that communicates with the pipe line 31 is provided inside. The upper portion is formed with a mounting portion 33 to which the flow rate adjusting knob 5 can be screwed.

  The valve hole 32 is orthogonal to the pipe line 31 between the first partition wall 32 a rising from the lower surface of the pipe line 31 and the second partition wall 31 b depending from the upper surface of the pipe line 31. Is formed.

  The mounting portion 33 is provided with a screw hole 34 into which a later-described male screw portion 51 of the flow rate adjusting knob 5 can be screwed, and an insertion hole 35 communicating with the screw hole 34 via a step portion, and on an outer concentric circle. Is provided with a locking groove 36 having a substantially U-shaped cross section. The screw hole 34 and the insertion hole 35 are formed coaxially with the valve hole 32.

  As shown in FIG. 1, the throttle valve 4 includes a valve base 41 slidably formed in the insertion hole 35, and a substantially conical valve that decreases in diameter from the lower surface of the valve base 41 toward the valve hole 32. A portion 42 is formed. A circumferential groove 41a is provided around the outer periphery of the valve base 41, and a sealing member 43, for example, an O-ring is attached to the circumferential groove 41a to achieve air-watertightness between the valve base 41 and the insertion hole 35. ing.

  The flow rate adjusting knob 5 is connected to the upper surface of the valve base 41 of the throttle valve 4, and is provided with a male screw portion 51 that can be screwed into the screw hole 34 of the mounting portion 33, and an upper end of the male screw portion 51. The adjustment knob 5 is formed of a knob portion 52 that can be rotated. The throttle valve 4 and the flow rate adjusting knob 5 are integrally formed.

  As shown in FIGS. 1 and 2, the rotation preventing means 6 includes a cylindrical portion 61 that covers the outside of the flow rate adjusting knob 5, and an elastically deformable projection that protrudes inward from the lower end of the cylindrical portion 61. And a locking projection 62. In this case, the cylindrical portion 61 is provided with slits 63 extending vertically from a plurality of circumferential positions, for example, six lower ends, and the locking projections 62 are formed by these slits 63 so as to be elastically deformable.

  As shown in FIG. 3 (a), the flow rate regulating valve 1 formed in this way presses the rotation preventing means 6 downward from above, so that the cylindrical portion 61 and the locking projection 62 are elastically deformed. Thus, the engagement between the locking projection 62 and the locking groove 36 is released, and the locking projection 62 slides on the outer periphery of the mounting portion 33 of the housing 3 and moves downward. In this state, the flow rate can be adjusted easily by rotating the knob 52 of the flow rate adjustment knob 5 and adjusting the distance between the throttle valve 4 and the valve hole 32 to adjust the flow rate. Can do. Further, as shown in FIG. 3B, after the adjustment of the flow rate is finished, the rotation preventing means 6 is slid upward to engage the locking projection 62 with the locking groove 36, and the cylindrical portion 61 Since the flow rate adjustment knob 5 is locked in a state of covering the outer periphery of the flow rate adjustment knob 5, the flow rate adjustment knob 5 can be protected by the rotation preventing means 6. Can be prevented.

  In the first embodiment, the auxiliary lock nut 20 is screwed into the male thread 51 of the flow rate adjustment knob 5 as shown by a two-dot chain line in FIG. And may be fixed.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a partial cross-sectional perspective view (a) and a partial cross-sectional plan view (b) showing a second embodiment of the flow control valve according to the present invention.

  In the second embodiment, instead of the locking groove 36 provided around the mounting portion 33 of the housing 3 in the first embodiment, a plurality of locking grooves 37 and a vertical groove 38 continuing to the locking groove 37 are provided. This is the case.

  As shown in FIG. 4, the housing 3 </ b> A is formed in a substantially cylindrical shape as in the first embodiment. The housing 3 </ b> A communicates with the outer periphery of the lower portion facing the conduit 31 and communicates with the conduit 31 inside. A valve hole (not shown) is provided, and an attachment portion 33 to which the flow rate adjusting knob 5 can be screwed is formed at the top.

  The mounting portion 33 is provided with a screw hole 34 into which the male screw portion 51 of the flow rate adjusting knob 5 can be screwed, and an insertion hole (not shown) communicating with the screw hole 34 via a step portion. A plurality of (in this case, two) locking grooves 37 having a substantially U-shaped cross section are provided on the upper side, and extend vertically from one end of the locking grooves 37 and extend from the upper portion to the lower portion of the mounting portion 33. An existing vertical groove 38 is formed.

  On the other hand, the rotation preventing means 6A includes a cylindrical portion 61 that covers the outside of the flow rate adjusting knob 5, a flange portion 64 that protrudes inward from the lower end portion of the cylindrical portion 61, and a distal end of the flange portion 64. And a plurality of (in this case, two) locking projections 65 projecting from each other.

  Next, the operation procedure of the flow control valve 1 in the second embodiment will be described. First, as shown in FIG. 5A, the locking protrusion 65 of the rotation preventing means 6 </ b> A is positioned at the lower end of the vertical groove 38 and the rotation preventing means 6 </ b> A is placed on standby at a position away from the flow rate adjusting knob 5. In this state, the flow rate can be adjusted by rotating the knob 52 of the flow rate adjusting knob 5 and adjusting the distance between the throttle valve 4 and the valve hole 32. After the adjustment of the flow rate is finished, the locking protrusion 65 is slid along the vertical groove 38 to the locking groove 37 (see FIG. 5B). When the locking projection 65 reaches the locking groove 37, the locking projection 65 can be engaged with the locking groove 37 by rotating the locking projection 65 along the locking groove 37 (FIG. 5 ( c)).

  Further, in order to move the rotation preventing means 6A away from the flow rate adjusting knob 5, the locking protrusion 65 locked in the locking groove 37 by rotating the rotation preventing means 6A in the reverse procedure to the above description. Is slid along the locking groove 37, and the locking projection 65 is slid along the vertical groove 38 from above to below.

  Since the flow rate adjusting valve 1 formed in this manner can cover the outside of the flow rate adjusting knob 5 by the cylindrical portion 61 by engaging the locking protrusion 65 of the rotation preventing means 6A with the locking groove 37, It is possible to prevent the flow rate adjusting knob 5 from rotating erroneously due to carelessness of the operator. Further, since the locking protrusion 65 of the rotation preventing means 6A can be slid along the locking groove 37 and the longitudinal groove 38, the rotation preventing means 6A can be easily operated.

  In the second embodiment, the case where the locking projection 62 provided on the rotation preventing means 6A is provided at the tip of the flange portion 64 has been described. However, it is not always necessary to form the locking projection 62 in this manner. It is good also as a structure which provides the some latching protrusion protrudingly provided inward from the lower end part of this.

  In the second embodiment, the other parts are the same as those in the first embodiment. Therefore, the same parts are denoted by the same reference numerals and the description thereof is omitted.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a perspective view showing a third embodiment of the flow regulating valve according to the present invention.

  In the third embodiment, the rotation preventing means 6B is pivotally attached to the outer periphery of the mounting portion 33 of the housing 3B so as to be able to rise and fall, and the stopper 66 can be fixed to the stopper 66 in an upright state. This is a case in which the spring member 67 for biasing and the anti-rotation body 68 that is attached to the free end of the stopper 66 and engages the flow rate adjusting knob 5 when the stopper 66 is in the standing state.

  As shown in FIG. 6, the housing 3 </ b> B is formed in a substantially cylindrical shape as in the first and second embodiments. Is provided with a valve hole (not shown), and an attachment portion 33 to which the flow rate adjusting knob 5 can be screwed is formed.

  The mounting portion 33 is provided with a screw hole 34 into which the male screw portion 51 of the flow rate adjusting knob 5 can be screwed, and an insertion hole (not shown) communicating with the screw hole 34 via a step portion. A pair of brackets 39 capable of pivoting the stopper 66 are provided.

  The bracket 39 is formed with a fitting insertion hole 39a into which a pivot 69 for pivotally mounting the stopper 66 is fitted. One end of a spring member 67 is attached to the inner surface of one bracket 39. A spring stopper 39b is provided.

  As shown in FIG. 6, the stopper 66 is provided with a mounting hole 66a through which the pivot shaft 69 can be inserted in the base end portion, and when the stopper 66 is in an upright state on one side of the free end portion, that is, on the flow rate adjusting knob 5 side. Is attached to the side surface of the bracket 39 on the side where the first spring stop 39b is formed, and the other end of the spring member 67 is attached to the second side. The spring stopper 66b is provided. In this case, the anti-rotation body 68 is formed of an elastic member made of synthetic resin, for example, and is elastically deformed when the stopper 66 is engaged with the knob portion 52 of the flow rate adjusting knob 5 in the standing state. The part 52 can be pressed and engaged.

  The spring member 67 is formed by a coiled spring having one end attached to a first spring stop 39 b provided on the bracket 39 and the other end attached to a second spring stop 66 b provided on the stopper 66. . In this case, when the line connecting the first spring stopper 39b and the second spring stopper 66b is positioned on the housing 3B side with respect to the center point 69a of the pivot 69, the spring member 67 has the stopper 66 against the stopper 66. When a line that connects the first spring stopper 39b and the second spring stopper 66b is positioned outside the center point 69a of the pivot 69, the biasing force that can be fixed in an upright state is applied to the stopper 66. The stopper 66 is formed so as to urge the urging force in the direction in which the stopper 66 falls outward (see FIG. 7).

  As shown in FIG. 7A, the flow control valve 1 formed in this way rotates the stopper 66 outward about the pivot 69, and moves the spring member 67 outside the center point 69a of the pivot 69. By positioning, the stopper 66 is fixed in a state where the stopper 66 is tilted by the urging force of the spring member 67. In this state, the flow rate can be adjusted easily by rotating the knob 52 of the flow rate adjustment knob 5 and adjusting the distance between the throttle valve 4 and the valve hole 32 to adjust the flow rate. be able to. After the adjustment of the flow rate, as shown in FIG. 7B, the stopper 66 is positioned on the flow rate adjustment knob 5 side with the pivot 69 as the center, so that the stopper 66 is in an upright state by the urging force of the spring member 67. In addition to being fixed, the rotation preventing body 68 can be engaged with the knob portion 52 of the flow rate adjusting knob 5 to fix the rotation of the flow rate adjusting knob 5, so that the flow rate adjusting knob 5 is erroneously caused by carelessness of the operator. It can be prevented from rotating.

  In the third embodiment, the case where the number of rotation preventing means 6B is one has been described. However, two rotation preventing means 6B facing each other may be provided as shown by a two-dot chain line in FIGS.

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

It is sectional drawing which shows 1st Embodiment of the flow control valve which concerns on this invention. 1 is a partial cross-sectional perspective view showing a first embodiment of a flow control valve according to the present invention. It is sectional drawing (a) and (b) which show operation | movement of 1st Embodiment of the flow regulating valve which concerns on this invention. It is the partial cross section perspective view (a) which shows 2nd Embodiment of the flow control valve concerning this invention, and the partial cross section top view (b) of (a). It is a perspective view (a) thru / or (c) which shows operation of a 2nd embodiment of a flow control valve concerning this invention. It is a perspective view which shows 3rd Embodiment of the flow regulating valve which concerns on this invention. It is sectional drawing (a) and (b) which show operation | movement of 3rd Embodiment of the flow regulating valve which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flow control valve 2 Flow path 3, 3A, 3B Housing 4 Throttle valve 5 Flow control knob 6, 6A, 6B Anti-rotation means 31 Pipe 32 Valve hole 33 Mounting part 36 Locking groove 37 Locking groove 38 Vertical groove 61 Cylinder Portion 62 Locking protrusion 65 Locking protrusion 66 Stopper 67 Spring member 68 Anti-rotation body

Claims (4)

A housing provided in the middle of the flow path and having a conduit communicating with the flow path and having a valve hole therein, a throttle valve movable forward and backward with respect to the valve hole, and a base end of the throttle valve A flow rate adjusting valve that is coupled to the valve hole of the housing and screwed to a mounting portion that protrudes coaxially with the valve hole,
An anti-rotation means is provided on the outer periphery of the mounting portion of the housing to prevent erroneous rotation of the flow rate adjustment knob in a state close to the flow rate adjustment knob and to allow the rotation operation of the flow rate adjustment knob in a state away from the flow rate adjustment knob. A flow control valve characterized by comprising The flow regulating valve according to claim 1, wherein
A locking groove is provided on the outer periphery of the mounting portion of the housing,
The rotation preventing means includes a cylindrical portion that covers the outside of the flow rate adjusting knob, and an elastically deformable locking protrusion that protrudes inward from the lower end of the cylindrical portion,
The flow rate adjusting valve, wherein the locking protrusion is formed to be slidable on the outer periphery of the mounting portion of the housing and to be engageable with the locking groove. The flow regulating valve according to claim 1, wherein
On the concentric circle on the outer periphery of the mounting portion of the housing, a plurality of locking grooves and a vertical groove extending vertically from the upper portion of the mounting portion of the housing and extending vertically from the locking groove,
The rotation preventing means includes a cylindrical portion that covers the outside of the flow rate adjusting knob, and a locking protrusion that protrudes inward from the lower end of the cylindrical portion,
The flow rate adjusting valve, wherein the locking protrusion is formed to be slidable in the longitudinal groove and is engageable with the locking groove. The flow regulating valve according to claim 1, wherein
The rotation preventing means includes a stopper when pivotably mounted on the outer periphery of the mounting portion of the housing, a spring member that urges the stopper with an elastic force capable of fixing the stopper in an upright state, and the stopper And a rotation preventing body that engages with the flow rate adjusting knob when the stopper is in an upright state.

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