JP2006266394A - Valve opening adjuster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve opening adjuster in which the valve opening can be precisely adjusted without enlarging equipment. <P>SOLUTION: A plurality of stopper holes 12 are bored in an opening plate 12 in equal intervals of a specified angle in the concentric circle having a plurality of rows. The angle of the stopper hole 12a is deviated based on the concentric circle row number. A rod of a rod member 6 is inserted into one of the stopper holes 12 by the operation of an operating lever 1 to rotate a valve shaft 7 of a butterfly valve 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a valve opening adjustment device that adjusts the opening of a butterfly valve in piping such as a plant.

  A butterfly valve is used to adjust the flow rate of piping in a plant or the like. The valve opening of the butterfly valve is adjusted by rotating the valve shaft by an operation lever (handle) connected and fixed to the valve shaft. The operation lever is operated manually. When the valve opening reaches a predetermined opening, the operation lever is locked to maintain the predetermined opening.

  In order to lock the operation lever with high accuracy, it is inevitable that the structure becomes complicated. For this reason, in order to allow a certain degree of opening error and lock the operation lever, a fan-shaped gear plate is fixed to the housing in which the valve is arranged, and a locking portion interlocked with the operation lever is attached to the gear plate. It is made to engage with a trough. This is described, for example, in Patent Document 1 below.

JP-A-9-217858

  In the prior art, the operating lever is locked by engaging a locking portion interlocked with the operating lever with a trough of the gear plate. In order to adjust the valve opening with high accuracy (finely), it is only necessary to shorten the gap between adjacent tooth roots of the gear plate, but the teeth are easily broken and the productivity is also deteriorated. For this reason, the gear plate must have a large diameter, which causes a problem that the apparatus becomes large.

  An object of the present invention is to provide a valve opening adjusting device that can adjust the valve opening with high accuracy without increasing the size of the device.

  A feature of the present invention is that a plurality of locking holes are formed at equal intervals on a plurality of concentric circles at regular intervals, and the angle of the locking holes is shifted based on the number of concentric circular rows for each concentric circular row. The opening plate is provided, and the rod of the lock member is inserted into one locking hole by the operation of the operation lever for rotating the valve shaft of the butterfly valve.

  Specifically, the locking holes of the opening plate are formed so as to be shifted by an angle obtained by dividing the specified angle by the number of concentric rows for each concentric row.

  In the present invention, a plurality of locking holes are formed on a plurality of concentric circles at equal intervals of a predetermined angle, and an opening plate is provided in which the angle of the locking holes is shifted based on the number of concentric circular rows for each concentric circular row. The rod of the lock member is inserted into any one of the locking holes formed in a plurality of concentric circles to lock the operation lever, so that the valve opening can be increased without increasing the size of the device. It can be adjusted with high accuracy.

  The cylindrical housing is provided with a butterfly valve on the inner peripheral side. One end of the valve shaft is fixed to the butterfly valve, and the other end projects from the outer end of a valve shaft cylinder formed in the housing. The valve shaft is rotatably supported by being sealed by a bearing provided in a cylinder of the valve shaft cylinder. The operation lever for rotating the valve shaft is rotatably connected to a fixed lever whose one end is fixed to the other end of the valve shaft. The opening disc is formed with a plurality of locking holes on a plurality of concentric circles at regular intervals of a specified angle. The locking holes are formed so as to be shifted by an angle obtained by dividing the specified angle by the number of concentric circles for each concentric circle. The opening disk is installed at the outer end of the valve stem. The lock member has a concentric array of rods. The rod of the lock member is inserted into any one of the locking holes formed on a plurality of concentric circles by rotating the movable lever, and locks the operation lever.

  FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partially sectional side view.

  In FIG. 1, a cylindrical housing 10 is provided with a butterfly valve 9 on the inner peripheral side. The inner peripheral diameter of the housing 10 is about 150 mm to 400 mm. A valve stem 15 is formed in the housing 10. One end of the valve shaft 7 is fixed to the butterfly valve 9, and the other end protrudes from the outer end of the valve shaft cylinder 15 formed in the housing 10. One end side of the valve shaft 7 is formed in a bifurcated shape, and the butterfly valve 9 is gripped by both legs and fixed by a bolt 16. The valve shaft 7 is sealed by a bearing 11 provided in a cylinder of the valve shaft cylinder 15 and is rotatably supported.

  The operation lever 1 for rotating the valve shaft 7 includes a fixed lever 2 having one end fixed to the other end of the valve shaft 7 by a nut 8 and a movable lever 3 connected to the fixed lever 2 by a support pin 5. A return spring 4 is disposed between the fixed lever 2 and the movable lever 3, and can be opened and closed at a predetermined angle as indicated by an arrow B by grasping or releasing the fixed lever 2 and the movable lever 3. That is, the movable lever 3 is rotatably connected to the fixed lever 2.

  The operation lever 1 includes a fixed lever 2, a movable lever 3, a return spring 4, and a support pin 5. The lock member 6 is attached to the movable lever 3 and moves in the vertical direction shown in the figure by the rotation of the movable lever 3 in the direction of arrow B. Details of the lock member 6 will be described later.

  The opening disk 12 is installed at the outer end of the valve stem cylinder 15. The opening disc 12 has a plurality of locking holes 12a formed on a plurality of concentric circles at regular intervals of a specified angle. In the locking holes 12a, the angle of the locking holes 12a is shifted based on the number of concentric circular rows for each concentric circular row. The deviation angle is an angle obtained by dividing the specified angle by the number of concentric circles for each concentric circle.

  FIG. 2 shows an example configuration diagram of the lock member 6. FIG. 2 is a sectional view of the lock member 6.

  The lock member 6 includes a first rod 13a and a second rod 13b. The first rod 13a and the second rod 13b have the same specifications, and the small-diameter tip on the lower side in the figure is easy to be inserted into the engagement hole 12a (12b) of the opening disk 12, and on the surface of the opening disk 12. It is formed in a spherical shape so that it can slide smoothly.

  Both rods 13a and 13b are housed together with the spring 14 in a recess 6b formed in the body 6a. The closing plate 15 is provided so that the rod 13a (13b) does not fall off from the recess 6b, and is fixed to the lower end surface of the body 6a.

  In the state shown in FIG. 2, the lock member 6 has a first rod 13a with a small diameter portion fitted into an engagement hole 12a provided in the opening disc 12, and a second rod 13b with its tip spherical portion opened. In contact with the upper surface of the degree disk 12. At this time, the spring 14 is in the opening direction in the first rod 13a and in the compression direction in the second rod 13b.

  FIG. 3 shows an example configuration diagram of the opening disc 12. FIG. 3 is a plan view seen from AA in FIG.

  The opening disc 12 has a plurality of locking holes 12a and 12b formed at equal intervals of a predetermined angle on two rows of concentric circles. The plurality of engagement holes 12a and 12b are formed on concentric arcs (concentric circles) Da and Db each having the center of the valve shaft 7 (the center of the opening disc 12) as a core. In FIG. 3, the fan angle range θc of about 90 degrees is formed at equal intervals of the specified angles θa and θb.

  In FIG. 3, the specified angles θa and θb are each 10 °, and the engagement holes 12a and 12b of the concentric circles Da and Db are formed by being shifted by 5 °. Therefore, the first rod 13a and the second rod 13b can be fitted into the engagement holes 12a and 12b every 5 °, and the operation lever 1 can be locked at this position. That is, by opening the engagement holes 12a and 12b on two rows of concentric circles, the valve opening can be adjusted with high accuracy.

  In this way, the opening disc 12 has a plurality of locking holes 12a and 12b formed at regular intervals of a predetermined angle on a plurality of concentric circles, and the locking holes 12a and 12b are concentric with a predetermined angle for each concentric circular row. It is drilled with an angle that is divided by the number of rows. The lock member 6 has concentric circular rods 13a and 13b, and the rods 13a and 13b of the lock member 6 are any one of the latches that are formed on a plurality of concentric circles by rotating the movable lever 3. The operation lever 1 is locked by being inserted into the holes 12a and 12b.

  The operation for adjusting the valve opening will be described.

  The fixed lever 2 and the movable lever 3 of the operation lever 1 are gripped by hand, the lock member 6 is lifted against the return spring 4, and the operation lever 1 is rotated in the circumferential direction of the opening disc 12. . As the operating lever 1 rotates, the butterfly valve 9 also rotates to adjust the flow rate. At this time, the first rod 13a and the second rod 13b are turned on and off from the engagement holes 12a and 12b every 5 ° by the rotation of the operation lever 1.

  When the holding of the fixed lever 2 and the movable lever 3 is released at an arbitrary position, the movable lever 3 is pushed down by the action of the return spring 4, and at the same time, the lock member 6 is also pushed down. For this reason, the rod 13a or the rod 13b is fitted and locked in any one of the engagement hole 12a or the engagement hole 12b. That is, the rod 13 of the lock member 6 is inserted into any one of the locking holes 12 formed on a plurality of concentric circles by the rotation operation of the movable lever 3 to lock the operation lever 1.

  In this way, the valve opening adjustment is performed, and a plurality of locking holes are formed at regular intervals of a predetermined angle on a plurality of concentric circles, and the locking holes are based on the number of concentric circular rows for each concentric circular row. Is provided with an opening plate whose angle is shifted, and the operating lever is locked by inserting the rod of the lock member into any one of the locking holes drilled on a plurality of concentric circles. The valve opening can be accurately adjusted without increasing the size of the apparatus.

  In the above-described embodiment, two concentric circular columns are used. However, the number of columns is not limited, and can be arbitrarily set. For example, three columns can be set at an angle obtained by shifting 10 degrees by three equal angles. Of course, the pitch can be locked about every 3.3 degrees.

  Further, it is obvious that the opening plate may be another shape instead of a disc.

It is a block diagram which shows one Example of this invention. It is an example block diagram of the locking member of this invention. It is an example block diagram of the opening disk of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Operation lever, 2 ... Fixed lever, 3 ... Movable lever, 4 ... Return spring, 5 ... Support pin, 6 ... Lock member, 6a ... Body, 6b ... Recessed part, 7 ... Valve shaft, 8 ... Nut, 9 ... Butterfly valve,
DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... Bearing, 12 ... Opening disk, 12 ... Engagement hole, 13 ... Rod, 14 ... Spring, 15 ... Valve stem cylinder.

Claims (3)

  A cylindrical housing in which a butterfly valve is disposed, one end of which is fixed to the butterfly valve, and the other end is pivotally supported so as to protrude from the outer end of a valve stem formed in the housing. A movable lever is rotatably connected to a valve shaft, and a fixed lever having one end fixed to the other end of the valve shaft, and an operation lever that rotates the valve shaft, and a plurality of rows of concentric circles at regular intervals of a specified angle A plurality of locking holes, and an opening plate in which the angle of the locking holes is deviated based on the number of concentric circular rows for each concentric circular row, and one locking hole by operating the movable lever And a locking member having a rod inserted into the valve opening degree adjusting device.   A cylindrical housing in which a butterfly valve is disposed on the inner peripheral side, a valve shaft having one end fixed to the butterfly valve and the other end protruding from an outer end of a valve shaft cylinder formed in the housing; A movable lever is rotatably connected to a bearing that is provided in the cylinder of the valve stem cylinder and seals the valve shaft so as to be pivotally supported, and a fixed lever that is fixed at one end to the other end of the valve shaft. And an operating lever for rotating the valve shaft and an opening that is provided at an outer end of the valve shaft cylinder and has a plurality of locking holes formed at equidistant intervals of a predetermined angle on a plurality of concentric circles. And a locking member having a concentric circular rod rod inserted into one of the locking holes by rotating the movable lever, and the opening disk has the locking holes. The valve opening is characterized in that each concentric circle is drilled at an angle based on the number of concentric circles. Adjusting device. The opening plate or the opening disk according to any one of claims 1 and 2, wherein the opening hole or the opening disk is formed by shifting the locking hole by an angle obtained by dividing the specified angle by the number of concentric rows for each concentric row. The valve opening degree adjusting device characterized by the above-mentioned.

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