JP6892783B2 - Rotary valve with minute opening display function and minute opening adjustment method - Google Patents

Description

The present invention relates to a rotary valve with a minute opening display function for displaying a minute opening of a valve body and a method for adjusting the minute opening.

Conventionally, a rotary valve such as a butterfly valve may be provided with an opening degree display unit for displaying the valve body opening degree to the outside. In this case, in particular, in the butterfly valve having a water filling function, in order to gradually fill the water from the start of water flow, the minute opening of the valve body from the vicinity of the valve closing is finely adjusted via the opening display unit. Often required to be visible. At that time, in general, this type of valve is equipped with an actuator having a built-in reduction gear function, and the rotation of the input shaft is decelerated to the output shaft and output via this reduction gear function. A rotary valve with a minute opening display function is known, which can be operated while visually recognizing the minute opening of the valve body by confirming the rotation angle on the decelerated output shaft side by utilizing this.

As an operating machine having an opening degree display function for a rotary valve, for example, a multi-stage gear type manual operating machine of Patent Document 1 is disclosed. In this manual operation machine, a planetary gear function is provided inside, and the input from the input shaft is decelerated via the planetary gear function and then output from the output shaft. In this case, the opening shaft on the output side is coaxially and rotatably attached to the input shaft, and the pointer is integrally attached to the opening shaft, while the lid covering the planetary gear function is marked with a scale. Has been done. With this configuration, the pointer can be rotated by the same rotation angle as the output shaft, and the rotation angle on the output side can be visually recognized from the outside by pointing the pointer to the scale.

On the other hand, in the valve with a minute opening display function of Patent Document 2, the speed reducer has an input shaft, an output shaft, a gear train between these input / output shafts, and an opening scale portion indicating the opening of the valve body. An opening pointer portion for indicating the opening scale portion is provided. The opening scale includes a full opening display scale that displays the valve body opening corresponding to the rotation angle of the output shaft, and a minute opening display scale that displays the valve body opening corresponding to the rotation angle of the input shaft. The opening degree guide unit has a full opening degree guideline indicating the opening degree on the full opening degree display scale and a minute opening degree guideline indicating the opening degree on the minute opening degree display scale. With this configuration, when the input shaft is rotated, the opening (rotation angle) of the valve body is indicated on the full opening display scale by the rotation of the output shaft, and the opening of the full opening pointer is expanded by the minute opening guide to be minute. It is designed to be instructed by the opening display scale.

Further, a minute opening pointer is provided so that the position can be adjusted around the axis, and the valve body is set to point to "0 degree" on the minute opening display scale at the position where water flow starts, so that water flow can be performed. The amount of rotation of the minute opening pointer from the time of (filling) can be visually recognized.

Japanese Patent No. 4435555 Japanese Unexamined Patent Publication No. 2016-11666

In the case of the former manual operation machine of Patent Document 1, since only the rotation angle on the output side is confirmed by the pointer rotating at the same rotation angle as the output shaft, it is necessary to visually recognize the minute rotation angle of the valve body. Is difficult. For this reason, it is difficult to say that it is particularly suitable for rotary valves that require fine adjustment of the valve body, and it is suitable for water filling butterfly valves that require fine control of the minute opening near the valve closing during water filling. Difficult to use.

On the other hand, in the latter valve with a minute opening display function of Patent Document 2, the state of the minute opening can be confirmed by the minute opening guide and the minute opening display scale, and the minute opening guide is further adjusted. As a result, the rotational state of the input shaft from an arbitrary operating state of the valve body can be visually recognized by the minute opening pointer.

However, with this reducer, the number of times the input shaft has rotated cannot be confirmed on the scale. Therefore, in order to confirm the rotation speed from the start of filling, it is necessary to separately count the rotation speed of the minute opening pointer by a method other than visual inspection. Moreover, since the full opening degree display scale and the minute opening degree scale are in the positioning state, it is not possible to adjust the minute opening degree scale with respect to the full opening degree display scale. From this, it is possible to set the minute opening pointer to point to "0 degrees" on the minute display scale at the time of filling, and to visually recognize the amount of rotation of the minute opening pointer from the start of filling. At the same time, the full opening display scale cannot be adjusted with respect to the full opening display pointer and reset to the 0 position. As a result, at the start of water filling, when the minute opening pointer points to the position of 0 degrees, the full opening display pointer slightly advances from the fully closed state to the opening direction, and the display of the minute opening display and the full opening display deviate from each other. It becomes a relationship. In this way, when the valve body is operated from an arbitrary rotational state, the positional relationship between the pointers on the input shaft side and the output shaft side cannot be displayed correctly, so it is possible to confirm the accurate minute opening from the start of filling. Difficult and poor workability.
For this reason, it is possible to display a minute opening in order to accurately and highly accurately control the amount of rotation when the valve body rotates from the state where the valve body rotates from the valve closed state such as when the valve body is filled with water. The development of a rotary valve has been desired.

The present invention has been developed in order to solve the above-mentioned problems, and an object of the present invention is to accurately and highly accurately measure the amount of rotation when the valve body rotates from an arbitrary rotation state as compared with the conventional case. It is an object of the present invention to provide a rotary valve with a minute opening display function and a method for adjusting the minute opening, which can be displayed on the outside to visually recognize the minute opening and improve workability.

In order to achieve the above object, the invention according to claim 1 comprises a speed reducer having an input shaft and an output shaft, and the speed reducer includes a total opening degree display unit indicating the opening degree of the output shaft and the total opening degree display unit. It is a rotary valve provided with a total opening pointer unit that indicates, and on the input shaft side, there is a minute opening display unit that displays the valve body opening corresponding to the rotation angle of the input shaft in the minute opening range. together are provided, the speed reducer further a rotational speed display unit for displaying the rotational speed of the input shaft, and the rotational speed pointer portion pointing in the rotational speed display unit the rotational speed of the input shaft is provided, the rotation speed display The set position of the unit is a rotary valve with a minute opening display function provided on the upper surface of the speed reducer so that the rotation can be adjusted by a rotation adjusting means.

The invention according to claim 2 is a rotary valve with a minute opening degree display function in which the start point position of the rotation speed display part is a pointer part of the minute opening degree display part.

The invention according to claim 3 is a rotary valve with a minute opening display function in which a minute opening display unit is provided on an indicator provided on an input shaft and a start point display unit is provided at a start point position of the minute opening display unit. is there.

The invention according to claim 4 is a rotary valve with a minute opening degree display function, wherein the setting position of the full opening degree display unit is provided on the upper surface of the speed reducer so that the rotation can be adjusted by rotation adjusting means.

The invention according to claim 5 provides a pointer that rotates in synchronization with the output shaft on the output shaft side of the speed reducer that decelerates the rotation of the input shaft and outputs the output to the output shaft to rotate the rotary valve. With the rotary valve fully closed, align the full opening pointer section of the above with the start point position of the full opening display section showing the opening of the output shaft, and rotate the input shaft to the water flow start position with the rotary valve loaded with water pressure. Advance the full opening pointer section from the start point position of the full opening display section to the filling start position, and adjust the start point position of the minute opening indicator section that rotates in synchronization with the input shaft to the rotation speed pointer section provided on the pointer. While fixing to the input shaft, the start point position of the rotation speed display unit that displays the rotation speed of the input shaft is aligned with the start point position of the minute opening degree display unit, so that the minute opening degree can be displayed accurately. This is a method for adjusting the minute opening.

In the invention according to claim 6 , the valve body opening corresponding to the rotation angle of the input shaft is displayed in the minute opening range on the minute opening display unit, and is input to the rotation speed display unit by the rotation speed pointer unit. This is a method for adjusting the minute opening of a rotary valve in which the rotation speed of the shaft is indicated.

The invention according to claim 7 is a method for adjusting a minute opening degree of a rotary valve in which a set position of a rotation speed display unit is provided on the upper surface of a speed reducer so as to be rotatable by a rotation adjusting means.

The invention according to claim 8 is a method for adjusting a minute opening degree of a rotary valve in which a setting position of a full opening degree display unit is provided on the upper surface of the speed reducer so as to be rotatable by a rotation adjusting means.

According to the invention of claim 1, in addition to being able to display the opening degree of the output shaft by the full opening degree display unit and the full opening degree pointer unit, a minute opening degree display unit is displayed on the input shaft and a rotation speed is displayed on the speed reducer. By providing the unit and the rotation speed pointer unit, it is possible to adjust the minute opening while visually recognizing the number of rotations of the input shaft by the rotation speed display unit. At this time, since the minute opening of the input shaft can be indicated while synchronizing the rotation of the output shaft with the input shaft, the amount of rotation when the valve body rotates from an arbitrary rotation state is more accurate than before. Moreover, the minute opening can be visually recognized by displaying it on the outside with high accuracy. As a result, it becomes possible to accurately rotate the output shaft to adjust the minute opening degree and perform the water filling work, and the workability is also improved. Furthermore, even if there is a difference in the valve opening at the start of filling due to the diameter or individual difference of the valve body, or if the valve opening at the start of filling changes due to long-term use or deterioration, etc. The valve opening can be controlled with high accuracy by resetting the water filling start position and adjusting the display of the minute opening. In particular, on the upper surface of the speed reducer, these positions can be adjusted relatively by rotating the position of the rotation speed display unit with respect to the total opening degree display unit via the rotation adjustment means, and the valve closed state is changed to the water filling start state. Starting from the time, the accurate rotation speed of the output shaft from this position can be displayed on the rotation speed display unit.

According to the second aspect of the present invention, since the start point position of the rotation speed display unit is used as the pointer unit of the minute opening degree display unit, the amount of rotation of the minute opening degree display unit with respect to the start point position of the rotation speed display unit is visually recognized. The minute opening of the input shaft can be confirmed without separately providing a pointer for the minute opening display. Moreover, since the rotation speed display unit can centrally display the rotation speed of the output shaft and the minute opening on the input side, the rotation speed of the output shaft and the input shaft can be visually recognized by visually recognizing the vicinity of the rotation speed display unit. It is possible to accurately check the minute opening due to rotation at a glance.

According to the invention of claim 3, since the start point display unit is provided on the minute opening display unit of the indicator provided on the input shaft, the position of the start point display unit is adjusted with respect to the rotation speed display unit to adjust the scale. If they are aligned, the position of the start point display unit can be confirmed after the input shaft has rotated to the position where the filling starts, and the minute rotation of the input shaft can be accurately displayed.

According to the invention of claim 4 , the total opening scale portion can be adjusted by rotating relative to the rotation speed display portion via the rotation adjusting means, so that the start point of the full opening scale portion can be closed by the valve of the output shaft. It is possible to accurately adjust to the state, and it is possible to display the accurate opening degree of the output shaft from the valve closed state on the full opening degree display unit.

According to the invention of claim 5 , in a state where the output shaft is rotated to the state of being filled with water when the valve is opened, the start point position of the minute opening display unit, the start point position of the rotation speed display unit, and the rotation speed pointer unit are combined. Since the rotation speed display unit can be positioned, it is possible to perform alignment at the start of filling with excellent workability. In addition to being able to display the opening degree of the output shaft by the full opening degree display unit and the full opening degree pointer unit, it is more accurate by the rotation speed pointer unit on the output shaft side and the minute opening degree display unit on the input shaft side when filling water. A small opening can be confirmed.

According to the invention of claim 6 , the rotational state of the rotation speed pointer unit of the pointer on the output shaft side and the minute opening degree display unit on the input shaft side can be confirmed with respect to the start point position of the rotation speed display unit. Compared with the conventional case, it is possible to control the minute opening while accurately and highly accurately checking the amount of rotation when the valve body rotates from the state of starting filling.

According to the invention of claim 7 , these positions can be relatively adjusted by rotating the position of the rotation speed display unit with respect to the total opening degree display unit via the rotation adjustment means on the upper surface of the speed reducer, and the valve is closed. Starting from the time when the water filling start state is reached, the accurate rotation speed of the output shaft from this position can be displayed on the rotation speed display unit.

According to the invention of claim 8 , the total opening scale portion can be adjusted by rotating relative to the rotation speed display portion via the rotation adjusting means, so that the start point of the full opening scale portion can be closed by the valve of the output shaft. It is possible to accurately adjust to the state, and it is possible to display the accurate opening degree of the output shaft from the valve closed state on the full opening degree display unit.

It is a front view which shows the speed reducer for a rotary valve. It is a half cross-sectional view which shows the rotary valve with the minute opening degree display function of this invention. It is a separation sectional view of a reduction gear. It is a plan view of a speed reducer. It is a top view which shows the state at the time of the start of filling of the speed reducer of FIG. It is a top view which shows the state which attached the rotation speed display part to the reduction gear of FIG. It is a top view which shows the valve closed state of the speed reducer of FIG. It is a top view which shows the state which the output shaft of the speed reducer of FIG.

Hereinafter, embodiments of the rotary valve with the minute opening display function and the minute opening adjusting method according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a speed reducer for a rotary valve, and FIG. 2 shows a cross-sectional view of a rotary valve with a minute opening display function of the present invention.

The rotary valve with a minute opening display function in the present invention is, for example, a butterfly valve with a water filling function, and a speed reducer 2 is mounted on the valve body 1.
The speed reducer 2 shown in FIGS. 1 and 2 has an input shaft 3 and an output shaft 4, and further has a speed reduction mechanism 5 and a cap 6. The speed reducer 2 is provided so as to be rotatable by a key handle (opening key) (not shown), a rotational force is input to the input shaft 3 via the cap 6, and the rotation of the input shaft 3 is performed via the speed reduction mechanism 5. After being decelerated, the output is output from the output shaft 4, and the rotation of the output shaft 4 is transmitted to the stem 7 of the valve body 1 to operate a valve body (not shown) connected to the stem 7.

The reduction gear mechanism 5 includes a differential gear function having an external gear 10, an internal gear 11, an eccentric cam 12, and a pin 13, and a predetermined reduction ratio is set by the difference in the number of teeth between the external gear 10 and the internal gear 11. The speed reducer 2 used in this example is provided by a combination of gears in which the input shaft 3 and the output shaft 4 rotate in the same direction, and the output shaft 4 also rotates clockwise due to the clockwise rotation of the input shaft 3. The valve is designed to open. The input shaft 3 and the display member 20 and the pointer 21, which are described later and rotate in synchronization with the input shaft 2, rotate in the same direction, so that the visibility is excellent and intuitive operation is possible. Since the speed reduction mechanism 5 is a gear mechanism in which the input shaft 3 and the output shaft 4 rotate in the same direction, the so-called self-locking function is also exhibited, and the operating force is transmitted while preventing the rotation due to the fluid pressure. There is.
When the input shaft 3 is rotated once, this rotation is decelerated by the deceleration mechanism 5, and the output shaft 4 is decelerated and rotated by the amount of one rotation of the input shaft 3, and the rotation of the input shaft 3 is displayed as the number of rotations described later. Shown by part 22.

The cap 6 of FIG. 3 is provided on the operation portion side, and is integrally attached to the upper end portion of the input shaft 3 by fitting. The cap 6 may have a structure called a so-called slip cap. In this case, when an excessive torque is applied from the input side, the cap 6 slips on the input side and the rotation transmission to the input shaft 3 is cut off. When a slip cap is used, even if an unnecessarily large operating torque is applied in a state where it is difficult to understand the nominal diameter of the valve body 1 due to burying, etc., an excessive rotational force is not transmitted to the input shaft 3. Safe rotation operation is possible. Further, it is possible to select caps 6 having different slip torques according to the torque required for operating the valve body 1.

In FIGS. 3 to 8, the speed reducer 2 is provided with a total opening degree display unit 23 which is a scale indicating the total opening degree, a rotation speed display unit 22 which is a scale indicating the rotation speed, and a pointer 21 for pointing to these scales. The pointer 21 includes a full opening guideline portion 30 and a rotation speed guideline portion 31. On the other hand, on the input shaft 3 side, a minute opening degree display unit 32 having a scale is provided. As a result, the opening degree of the stem 7 is provided so as to be visible from the outside.

Here, the "total opening degree display" in the present invention is the opening degree display on the output side from the valve closing to the valve body when the valve body (stem 7) is operated, while the "small opening degree display" is the valve body. (Stem 7) It means the opening degree display on the input side at the time of operation. As will be described later, the "total opening degree display" is the full opening degree display unit 23 and the pointer 21 (total opening degree guideline unit 30), and the "small opening degree display" is the rotation speed display unit 22 and the minute opening degree display unit 32 and the pointer. 21 (rotation speed pointer unit 31) is provided so as to be able to display each.

An annular name plate 33 is provided on the outer peripheral side of the upper surface of the speed reducer 2 using a material such as SUS, and the full opening degree display unit 23 is provided on the surface of the name plate 33. The full opening degree display unit 23 is provided for opening the output shaft 4, and is fixed to the upper surface of the speed reducer 2 from the valve closed state (valve angle 0 °) to the valve open state (valve angle 90 °). The total opening degree of the valve body is described together with a numerical value indicating the angle of the valve body and the ratio of the valve opening degree over a range of approximately 90 ° of the name plate 33, and when instructed by the total opening degree pointer unit 30, the rotation state of the output shaft 4 Can be displayed. The full opening degree display unit 23 is also marked with a filling opening degree range display unit 34, which is a range of valve opening degrees suitable for filling water. Further, the name plate 33 has a nominal diameter, a manufacturer's name, a nominal pressure, a maximum allowable pressure, a maximum flow velocity, a year of manufacture, and the like (not shown).

A sticking portion 40 is provided as a rotation adjusting means on the back surface side of the full opening degree display unit 23 (name plate 33) of the name plate 33, and the name plate 33 (full opening degree display unit) is provided on the upper surface of the speed reducer 2 via the sticking portion 40. 23) is attached. As a result, the full opening display unit 23 is attached to the speed reducer 2 while being oriented in a desired direction, so that the set position of the full opening display unit 23 is rotatably provided on the upper surface of the speed reducer 2 by the rotation adjusting means 40. It is possible to display the total opening degree while accurately mounting the output shaft 4 (total opening degree pointer unit 30) according to the rotational state. The rotation adjusting means 40 of the full opening degree display unit 23 may be a means other than the sticking part as long as the rotation of the full opening degree display unit 23 can be adjusted with respect to the upper surface of the speed reducer 2.

The rotation speed display unit 22 is provided for displaying the rotation speed of the input shaft 3, and is marked on the upper surface of the fan-shaped member 41 formed separately from the total opening degree display unit 23. ° Provided on the opposite side. Then, the rotation speed of the input shaft 3 can be displayed by being instructed by the rotation speed pointer unit 31. The rotation speed display unit 22 is described together with a numerical value indicating the rotation speed of the input shaft 3 over a range of approximately 90 °, similarly to the full opening degree display unit 23.

A linear display pointer unit 42 is marked at the start point position (0 (zero) position) of the rotation speed display unit 22, and the display pointer unit 42 reads the scale when the minute opening display unit 32 rotates. It becomes a guideline part for. The scales constituting the rotation speed display unit 22 including the display pointer unit 42 are formed at equal intervals so as to correspond to the rotation speed of the input shaft 3.

In this way, since the display pointer unit 42 functions as a guide unit for reading the scale when the minute opening display unit 32 rotates, it is not necessary to provide a new minute opening guide unit, and the display guideline Since the unit 42 and the minute opening display unit 32 are arranged so as to face each other without the intervention of the fully open display member, the visibility of the minute opening, particularly the visibility of the rotation speed display, can be improved.

The rotation speed display unit 22 (fan-shaped member 41) is provided with two elongated holes 50, 50 and two screws 51, 51 having a predetermined length as rotation adjusting means, and the rotation speed is increased by the elongated holes 50 and the screws 51. The display unit 22 is fixed to the upper surface of the speed reducer 2. At that time, by changing the stop position of the screw 51 to the elongated hole 50, the position of the rotation speed display unit 22 is provided so that the rotation speed can be adjusted on the upper surface of the speed reducer 2. Similar to the rotation adjusting means of the full opening degree display unit described above, this rotation adjusting means is other than the combination of the elongated hole 50 and the screw 51 as long as the rotation speed display unit can be rotated with respect to the upper surface of the speed reducer. Various means can also be used.

In FIG. 2, an opening shaft 52 is rotatably attached to the upper part of the output shaft 4 together with the output shaft 4 and the valve body, and the above-mentioned pointer 21 is integrally fitted to the upper part of the opening shaft 52. The guideline 21 is integrally formed with the full opening guideline portion 30 and the rotation speed guideline portion 31 at intervals of 180 °. The pointer 21 is attached so that the full opening guide unit 30 points to the full opening display unit 23 and the rotation speed guide unit 31 points to the rotation speed display unit 22 in synchronization with the output shaft 4. The full opening degree display unit 23 is indicated according to the amount of rotation of the output shaft 4 from the valve closed state.

On the other hand, the rotation speed pointer unit 31 is configured to point to the rotation speed display unit 22 in a state where the rotation speed of the input shaft 3 is synchronized with the rotation of the output shaft 4, and the rotation speed pointer unit 31 is indicated by the rotation speed pointer unit 31. For example, it is colored red or the like.

The minute opening degree display unit 32 is provided so that the valve body opening degree corresponding to the rotation angle of the input shaft 3 can be rotated in synchronization with the input shaft 3 side for display in the minute opening degree range, and the total opening degree display unit 23 Placed inside. The minute opening display unit 32 is marked on the upper surface of the display member 20 which is a plate material having a substantially annular thickness of an appropriate thickness, and the display member 20 can be fixed to the upper surface of the substantially annular indicator 55 provided on the input shaft 3. It is provided in. At the start point position of the minute opening display unit 32, the start point display unit 60 is provided together with the number "0 (zero)", and the minute opening display unit 32 is a scale unit at equal intervals with the start point display unit 60 as a base point. Is divided by.

In this case, the minute opening degree display unit 32 is described by dividing 360 °, which is one rotation, into 16 parts. When the minute opening degree display unit 32 is finely divided in this way, fine adjustment during rotation of the input shaft 3 becomes easy. For example, when 360 ° is engraved in multiples of 4 such as 1/4 rotation, 1/8 rotation, and 1/16 rotation as the scale step of the input shaft 3 of 1 rotation or less, the minute opening display unit 32 It is easy to intuitively visually recognize the rotation state of the valve, and in particular, as shown in the figure, when the step is divided into steps every 1/16 rotation, the step of the amount of change in the Cv value of the valve can be adjusted more finely. It becomes. The above-mentioned numbers from 0 (zero) to 15 are sequentially written on the minute opening degree display unit 32.

The indicator 55 is fixed to the cap 6 coaxial with the input shaft 3 by the set screw 61. With the set screw 61, the minute opening degree display unit 32 can be fixed in a state where the position of 0 in the circumferential direction with respect to the input shaft 3 can be rotationally adjusted.

As described above, since the positions of the rotation speed display unit 22 and the minute opening display unit 32 can be adjusted respectively, the full opening pointer unit 30 of the pointer 21 with the output shaft 4 of FIG. 5 having a minute opening. Is in a state of being advanced in the valve opening direction from "0 (zero)" which is the start point position of the full opening degree display unit 23, as shown in FIG. 6, the rotation speed display unit 22 and the minute opening degree display unit 32. It is possible to adjust the rotation of each of the above to match the starting point position with respect to the rotation speed pointer portion 31 of the pointer 21. Utilizing this, an arbitrary rotation state of the output shaft 4, for example, a minute opening degree from the state of starting water filling in FIG. 5 is displayed as the rotation speed of the output shaft 4 by the rotation speed pointer unit 31 and the minute opening degree. It can be displayed by the amount of rotation of the input shaft 3 by the unit 32.

The valve body 1 on which the speed reducer 2 described above is mounted is mainly arranged in a water pipe and used for initial water filling, and has a unieccentric structure offset from the center of the stem 7, although not shown. .. A valve body is attached to the stem 7, and a plurality of comb-shaped grooves are formed on the outer peripheral surface of the valve body. When the valve body rotates, the gap between the valve seat surface and the valve seat surface formed in the valve box through the comb-shaped groove gradually widens, so that the gentleness suitable for initial water filling is between the minimum opening and the small opening. A region is provided that exhibits various flow rate change characteristics. The speed reducer 2 is connected to the stem, and a minute opening degree can be displayed via the speed reducer 2.

For example, in the valve body 1, the target flow velocity at the time of filling is set to 0.5 m / s, and in order to satisfy this target flow velocity, the valve opening is 15% and the pressure is 4K when the water pressure is 7.5K. The valve capacity is sometimes 20% and the valve opening is 25% when the pressure is 1K. The speed reducer 2 has a minute opening display function corresponding to these, and the target valve opening corresponding to the water pressure can be adjusted by operating the valve opening while adjusting the minute opening with the speed reducer 2. Therefore, water can be passed at a target flow velocity of 0.5 m / s. The target flow velocity at the time of filling is appropriately set, and the scale and the like can be changed according to the target flow velocity.

Each scale forming the full opening degree display unit 23, the rotation speed display unit 22, and the minute opening degree display unit 32 can be appropriately set so as to display a region of the amount of water suitable for filling according to the working pressure. For this reason, the speed reducer 2 provided with these display parts may have a different filling start position or diameter of the valve body 1, or an eccentric butterfly valve other than the single eccentric structure, a shaft core butterfly valve, or the like. It can be applied to rotary valves of the above, and can also be used for valves other than rotary valves.

The rotation adjusting means described above may be provided on either the rotation speed display unit side or the opening degree display unit side, or may be provided on both of them. The "rotation adjustment" of the rotation adjustment means in the present embodiment means that the rotation adjustment means can be rotated and adjusted with respect to the axis of the input shaft and the output shaft.

Subsequently, the method and operation of adjusting the minute opening degree of the rotary valve according to the above-described embodiment will be described.
In FIG. 4, a name plate 33 (total opening degree display unit 23) is attached to the upper surface of the speed reducer 2 and a cap 6 is attached to the input shaft 3 in advance before adjusting the minute opening degree. Further, the pointer 21 is attached to the opening shaft 52 on the output shaft 4 side so that the pointer 21 rotates synchronously with the output shaft 4. The display member 20 on which the minute opening degree display unit 32 is marked is integrally fixed to the upper surface of the indicator 55. The fan-shaped member 41 on which the rotation speed display unit 22 is marked is temporarily fixed to the upper surface of the speed reducer 2 via a long hole 50 by a screw 51 so that the position can be adjusted.

In this state, first, the cap 6 (input shaft 3) is operated to fully close the valve, and the full opening pointer portion 30 of the pointer 21 that rotates synchronously with the output shaft 4 is placed at the start point position of the full opening display unit 23 ( Align to the 0 position) with the rotary valve fully closed (the valve body opening degree is 0 ° and the valve body rotation speed is 0%). As a result, the full opening pointer unit 30 rotates together with the output shaft 4 within a range of approximately 0 ° to 90 ° of the full opening display unit 23.

Next, in FIG. 5, with the valve body 1 loaded with water pressure, the input shaft 3 is rotated in the opening direction to the water passage start position, and the full opening pointer unit 30 is filled with water from the start point position of the full opening display unit 23. Advance to the position.
In this state, the free indicator 55 is rotated with respect to the cap 6 so that the start point position of the minute opening display unit 32 that rotates in synchronization with the input shaft 3 is aligned with the rotation speed pointer unit 31 of the pointer 21. , The set screw 61 is tightened to fix the indicator 55 (small opening degree display unit 32) to the input shaft 3 (cap 6).

As shown in FIG. 6, in the state where the valve body 1 starts leaking, the display pointer unit 42, which is the starting point position of the rotation speed display unit 22, is aligned with the rotation speed pointer unit 31. The fan-shaped member 41 is adjusted with respect to the name plate 33 so as to match the start point display unit 60 which is the start point position of 32, and the fan-shaped member 41 is screwed 51 to the upper surface of the speed reducer 2 (name plate 33) via the elongated hole 50. Fix it. As a result, the display pointer unit 42 of the rotation speed display unit 22 is aligned with the start point display unit 60 of the minute opening display unit 32, and the display pointer unit 42, the start point display unit 60, and the rotation speed pointer unit 31 are passed through water. By arranging them in a straight line in the start state (filling start state), the filling start position is reset as the start point position where the rotation speed of the input shaft 3 becomes 0, and from this state, the rotation speed display unit 22 and the minute opening degree are set. The minute opening can be accurately displayed by visually recognizing the rotational state of the display unit 32.

At this time, since the fan-shaped member 41 is attached to the upper surface of the speed reducer 2 via the elongated hole 50 and the screw 51, the position of the rotation speed display unit 22 can be easily adjusted, and the leakage start position of the valve body 1 is set. Even if it changes, the water filling start position can be easily reset by changing the mounting position of the fan-shaped member 41.

FIG. 7 shows a state in which the cap 6 of the speed reducer 2 of FIG. 6 is rotated in the valve closing direction. In this case, the full opening pointer unit 30 indicates “0” in the valve closed state of the full opening display unit 23, while the rotation speed guide unit 31 is the display pointer unit 42 (starting point 0) of the rotation speed display unit 22. Point to a minus position rather than the position of). From the state of the rotation speed display unit 22, it can be confirmed that the input shaft 3 has not reached the water filling start state.

In FIG. 8, as an operation example of the speed reducer 2, the input shaft 3 of the speed reducer 2 of FIG. 6 is operated from the water filling start state, and the output shaft 4 rotates the input shaft 3 one and a half revolutions from the water filling start position. Shows the state of In this case, the rotation speed pointer unit 31 is located between the display pointer unit 42 and the scales "1" and "2" of the rotation speed display unit 22, so that the output shaft 4 has one or more rotations and less than two rotations. By locating the scale "8" of the minute opening display unit 32 at the position of the display pointer unit 42, it can be confirmed that the input shaft 3 rotates 8/16, that is, half a rotation. .. Therefore, from the rotational state of the rotation speed pointer unit 31 on the output shaft 4 side and the minute opening display unit 32 on the input shaft 3 side, the input shaft 3 is rotated one and a half turns from the stage when the output shaft 4 is in the water filling start state. You can see that. At this time, since it is sufficient to check the scales of the rotation speed pointer unit 31 and the minute opening degree display unit 32 with reference to the display pointer unit 42, the visibility is excellent.

As described above, in the rotary valve with the minute opening display function of the present invention, the speed reducer 2 having the input shaft 3 and the output shaft 4 has a full opening display unit 23 indicating the opening degree of the output shaft 4 and a full opening guideline. A unit 30 is provided, a minute opening display unit 32 that displays the valve body opening degree of the input shaft 3 in a minute opening range is provided on the input shaft 3 side, and a rotation speed of the input shaft 3 is further provided on the speed reducer 2. By providing the rotation speed display unit 22 and the rotation speed pointer unit 31 for displaying the above, at the start of water filling, the full opening pointer unit 30 is rotated to the water filling start position of the full opening display unit 23. The output shaft 4 in the water filling start state is adjusted so that the rotation of the input shaft 3 is synchronized, and the minute opening from the start of water filling is accurately and highly accurately displayed on the rotation speed display unit 22 by the rotation speed pointer unit 31. Can point.

In this case, as described above, the rotation speed pointer unit 31 and the rotation speed display unit 22 use the rotation speed of the input shaft 3 from the start of water filling, the minute opening display unit 32, and the rotation speed display unit 22. By confirming the rotation of the input shaft 3 side that is less than one rotation of the output shaft 4, the opening degree from the start of filling can be accurately displayed to the outside. Moreover, since the rotation speed of the output shaft 4 and the rotation amount of the input shaft 3 are both based on the display pointer unit 42, the rotation speed pointer unit 31 and the minute opening display unit 32 (start point display unit 60) It is possible to prevent misalignment of the output shaft and control the rotation of the output shaft more accurately than when filling the water. As a result, workability at the time of filling is also improved.

Since the rotation speed pointer unit 31 and the minute opening display unit 32 are highly visible with respect to the display pointer unit 42, there is no risk of the operator confusing the display of the total opening degree with the display of the minute opening degree, and the rotation speed display unit Since the start point position of 22 serves as the pointer of the minute opening display unit 32 as the display pointer unit 42, the display portion can be configured with the minimum number of parts necessary without separately providing a pointer for the minute opening.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the description of the embodiments, and is within the scope of the invention described in the claims of the present invention. Therefore, various changes can be made.

1 Valve body 2 Reducer 3 Input shaft 4 Output shaft 21 Guideline 22 Rotation speed display 23 Full opening display 30 Full opening pointer 31 Rotation speed pointer 32 Micro opening display 40 Sticking part (rotation adjusting means)
42 Display pointer section 50 Long hole (rotation adjusting means)
51 screw (rotation adjusting means)
55 Indicator 60 Start point display

Claims (8)

A rotary valve provided with a speed reducer having an input shaft and an output shaft, and a total opening degree display unit indicating the opening degree of the output shaft and a total opening degree pointer unit indicating the total opening degree display unit. The input shaft side is provided with a minute opening degree display unit that displays the valve body opening degree corresponding to the rotation angle of the input shaft in the minute opening degree range, and the speed reducer is further provided. A rotation speed display unit that displays the rotation speed of the input shaft and a rotation speed pointer unit that indicates the rotation speed of the input shaft in the rotation speed display unit are provided , and the set position of the rotation speed display unit is decelerated. A rotary valve with a minute opening display function, which is provided on the upper surface of the machine so that the rotation can be adjusted by a rotation adjusting means. The rotary valve with a minute opening degree display function according to claim 1, wherein the start point position of the rotation speed display part is a pointer part of the minute opening degree display part. The rotation with a minute opening display function according to claim 1 or 2, wherein the indicator provided on the input shaft is provided with the minute opening display unit, and the start point display unit is provided at the start point position of the minute opening display unit. valve. The rotary valve with a minute opening display function according to claim 1, wherein the setting position of the total opening degree display unit is provided on the upper surface of the speed reducer so as to be rotatable by a rotation adjusting means. On the output shaft side of the speed reducer that decelerates the rotation of the input shaft and outputs it to the output shaft to rotate the rotary valve, a pointer that rotates in synchronization with this output shaft is provided, and the full opening pointer portion of this pointer is output. The rotary valve is fully closed to the start point position of the full opening display unit that indicates the opening of the shaft, and the input shaft is rotated to the water passage start position with the rotary valve loaded with water pressure to obtain the full opening pointer. The unit is advanced from the start point position of the total opening degree display unit to the filling start position, and in this state, the start point position of the minute opening degree display unit that rotates in synchronization with the input shaft is aligned with the rotation speed pointer unit provided on the pointer. While being fixed to the input shaft, the minute opening is accurately displayed by aligning the start point position of the rotation number display unit that displays the rotation speed of the input shaft with the start point position of the minute opening display unit. A method for adjusting the minute opening of a rotary valve. The valve body opening corresponding to the rotation angle of the input shaft is displayed in the minute opening range on the minute opening display unit, and the rotation speed pointer unit rotates the input shaft on the rotation speed display unit. The method for adjusting the minute opening degree of a rotary valve according to claim 5 , wherein the number is indicated in synchronization with the output shaft. The method for adjusting the minute opening degree of a rotary valve according to claim 5 , wherein the setting position of the rotation speed display unit is provided on the upper surface of the speed reducer so as to be rotatable by a rotation adjusting means. The method for adjusting the minute opening degree of a rotary valve according to claim 5 , wherein the setting position of the total opening degree display unit is provided on the upper surface of the speed reducer so as to be rotatable by a rotation adjusting means.

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